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Otaka A, Yamamoto T, Yamaoka T. High pressure pasteurization: Simultaneous native tissue decellularization and sterilization. Regen Ther 2024; 26:2-8. [PMID: 38361603 PMCID: PMC10864870 DOI: 10.1016/j.reth.2024.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 12/21/2023] [Accepted: 01/25/2024] [Indexed: 02/17/2024] Open
Abstract
Introduction Terminal sterilization is important for the clinical applicability of decellularized xenografts. High hydrostatic pressurization (HHP) process is a potential strategy for decellularization and decontamination of xenografts; however, its disinfection efficiency remains poorly elucidated. This study investigated the disinfection efficacy of the HHP process at physiologically relevant 36 °C against difficult-to-kill spore-forming bacteria. Methods Bacillus atrophaeus and Geobacillus stearothermophilus were suspended in a pressurization medium with or without antibiotic agents and pressurized under two different HHP procedures: repeated and sustained pressurization. Results The sustained pressurizing conditions, exploited for the conventional tissue decellularization, did not effectively eliminate the bacteria; however, repeated pressurization greatly increased the disinfection effect. Moreover, the antibiotic-containing pressurization medium further increased the disinfection efficiency to the level required for sterilization. Conclusions The optimized high hydrostatic pressurization can be used to sterilize biological tissues during the decellularization process and is a promising strategy for manufacturing tissue-derived healthcare products.
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Affiliation(s)
- Akihisa Otaka
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, 6-1 Kishibe-Shimmachi, Suita, Osaka, 564-8565, Japan
| | - Takashi Yamamoto
- Research & Development, JMS Co. Ltd, 12-17 Kako-machi, Naka-ku, Hiroshima, Japan
| | - Tetsuji Yamaoka
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, 6-1 Kishibe-Shimmachi, Suita, Osaka, 564-8565, Japan
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2
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Rowan NJ. Digital technologies to unlock safe and sustainable opportunities for medical device and healthcare sectors with a focus on the combined use of digital twin and extended reality applications: A review. Sci Total Environ 2024; 926:171672. [PMID: 38485014 DOI: 10.1016/j.scitotenv.2024.171672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/09/2024] [Accepted: 03/10/2024] [Indexed: 03/26/2024]
Abstract
Medical devices have increased in complexity where there is a pressing need to consider design thinking and specialist training for manufacturers, healthcare and sterilization providers, and regulators. Appropriately addressing this consideration will positively inform end-to-end supply chain and logistics, production, processing, sterilization, safety, regulation, education, sustainability and circularity. There are significant opportunities to innovate and to develop appropriate digital tools to help unlock efficiencies in these important areas. This constitutes the first paper to create an awareness of and to define different digital technologies for informing and enabling medical device production from a holistic end-to-end life cycle perspective. It describes the added-value of using digital innovations to meet emerging opportunities for many disposable and reusable medical devices. It addresses the value of accessing and using integrated multi-actor HUBs that combine academia, industry, healthcare, regulators and society to help meet these opportunities. Such as cost-effective access to specialist pilot facilities and expertise that converges digital innovation, material science, biocompatibility, sterility assurance, business model and sustainability. It highlights the marked gap in academic R&D activities (PRISMA review of best publications conducted between January 2010 and January 2024) and the actual list of U.S. FDA's approved and marketed artificial intelligence/machine learning (AI/ML), and augmented reality/virtual reality (AR/VR) enabled-medical devices for different healthcare applications. Bespoke examples of benefits underlying future use of digital tools includes potential implementation of machine learning for supporting and enabling parametric release of sterilized products through efficient monitoring of critical process data (complying with ISO 11135:2014) that would benefit stakeholders. This paper also focuses on the transformative potential of combining digital twin with extended reality innovations to inform efficiencies in medical device design thinking, supply chain and training to inform patient safety, circularity and sustainability.
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Affiliation(s)
- Neil J Rowan
- Centre for Sustainable Disinfection and Sterilization, Technological University of the Shannon, Midlands Campus, Ireland; CURAM SFI Research Centre for Medical Devices, University of Galway, Ireland.
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3
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Atero N, Córdova-Bührle F, Salgado-Caxito M, Benavides JA, Fernández M, Diethelm-Varela B, Ramos R, Sapiente Aguirre C, Trujillo F, Dürr S, Mardones FO. An assessment of the owned canine and feline demographics in Chile: registration, sterilization, and unsupervised roaming indicators. Prev Vet Med 2024; 226:106185. [PMID: 38507889 DOI: 10.1016/j.prevetmed.2024.106185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 03/06/2024] [Accepted: 03/08/2024] [Indexed: 03/22/2024]
Abstract
The global rise in companion animal populations, particularly dogs and cats, is driven by emotional and social benefits for owners, and their population management is becoming critically important to avoid a plethora of adverse effects on themselves, humans, and wildlife. We estimated the size and density of the owned canine and feline population in Chile and evaluated the status of microchipping, registration, sterilization rates, and the proportion of owned animals that roam unsupervised. A cross-sectional household survey in 36 districts was conducted and standard inferential statistics was employed to analyze differences between cats and dogs, sexes within each species, and between rural and urban areas. Additionally, two negative binomial models with mixed effects were developed to predict the number of dogs and cats per households. Two methods were used to compare population size estimates at the country level, multiplying: (1) the estimated mean number of companion animals per household by the estimated number of households at the country level, and (2) the estimated human:dog and human:cat ratios by the total human population. The study involved 6333 respondents, of which 76% (74% urban; 83% rural) owned companion animals (dogs and/or cats). Individuals in rural multi-person households increase the probability of owning dogs and/or cats. Additionally, women exhibit a greater inclination towards cat and dog ownership compared to men, while those over 30 years old demonstrate lower rates of companion animal ownership in contrast to the 18-30 age group for both species. The overall human:dog and human:cat ratios estimated were 2.7:1, and 6.2:1, respectively. The estimated total number of owned dogs and cats in Chile ranged from 9.6 to 10.7 million, depending on the methodological approach, while national median density of companion animals was 12 dogs per km2 (ranging from 0.02 to 7232) and 5 cats per km2 (ranging from 0.01 to 3242). This nationwide study showed one of the highest percentages of households with companion animals in Latin America and relatively low registration and sterilization rates, highlighting the need to strength long-term public policies to control populations of companion animals and promote responsibility in pet ownership.
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Affiliation(s)
- Nicolhole Atero
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Francisca Córdova-Bührle
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; Dirección de Transferencia y Desarrollo, Vicerrectoría de Investigación, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Julio A Benavides
- UMR MIVEGEC, IRD, CNRS, Université Montpellier, Montpellier, France; Centro de Investigación para la Sustentabilidad y Doctorado en Medicina de la Conservación, Facultad Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
| | - Miriam Fernández
- Estación Costera de Investigaciones Marinas (ECIM), Las Cruces, Facultad de Ciencias Biológicas y Núcleo Milenio para la Ecología y la Conservación de los Ecosistemas de Arrecifes Mesofóticos Templados (NUTME), Pontificia Universidad Católica de Chile, Av. Bernardo O'Higgins 340, Santiago, Chile
| | - Benjamín Diethelm-Varela
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago 7820244, Chile
| | - Romina Ramos
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Claudia Sapiente Aguirre
- Programa Nacional de Tenencia Responsable de Animales de Compañía (PTRAC), Subsecretaría de Desarrollo Regional y Administrativo (SUBDERE), Ministerio del Interior y Seguridad Pública de Chile; Departamento de Planificación y Gestión, de la División de Administración y Finanzas, Subsecretaría de Desarrollo Regional y Administrativo (SUBDERE), Ministerio del Interior y Seguridad Pública de Chile, Chile
| | - Florencia Trujillo
- Programa Nacional de Tenencia Responsable de Animales de Compañía (PTRAC), Subsecretaría de Desarrollo Regional y Administrativo (SUBDERE), Ministerio del Interior y Seguridad Pública de Chile
| | - Salome Dürr
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Fernando O Mardones
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; Departamento de Enfermedades Infecciosas e Inmunología Pediátrica, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago 7820244, Chile.
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Xu F, Zhang W, Wang X, Dai H, Yu C, Liu X, Li Z, Zhang M, Yan D, Chen F, Tang Y. Multi-level FeCo/N-doped carbon nanosheet for peroxymonosulfate oxidation and sterilization inactivation. J Colloid Interface Sci 2024; 661:840-852. [PMID: 38330656 DOI: 10.1016/j.jcis.2024.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/18/2024] [Accepted: 02/02/2024] [Indexed: 02/10/2024]
Abstract
Magnetic carbon-based catalysts with environmental friendliness have exhibited prominent effects on advanced oxidation processes. Herein, a multi-level FeCo/N-doped carbon nanosheet (FeCo/CNS) was synthesized by facile impregnation iron-cobalt salt onto cotton and followed by confined pyrolysis. We identified excellent advantages of the modified FeCo/CNS materials: (i) The convenience of the synthesis method and (ii) The dual effect of sterilization and contaminant degradation achieved through the FeCo/CNS-activated Peroxymonosulfate (PMS). The comparative experimental showed that FeCo/CNS could provide favorable catalytic performance, completely removing bisphenol A (BPA) and tetracycline (TC) within 5 min. Moreover, the potent sterilization properties against Staphylococcus aureus and Escherichia coli were also verified. Analysis of the degradation pathway confirmed the existence of intermediates, and toxicological research demonstrated that the toxicity of the degradation intermediates of BPA gradually decreased over time. Our research provided an excellent application of FeCo/CNS in PMS oxidation and sterilization inactivation.
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Affiliation(s)
- Fang Xu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Wuxiang Zhang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China.
| | - Xingang Wang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Hongliang Dai
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Chao Yu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Xingyu Liu
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Zihan Li
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Ming Zhang
- Department of Environmental Engineering, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
| | - Dengxin Yan
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, 9052 Gent, Belgium
| | - Fangyan Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China
| | - Yubin Tang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China.
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5
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Ghali H, Bouhlel H, Bhiri S, Helal S, Zitouni C, Somaii S, Othmen TB, Belhadj N, Saad OB, Balhi S, Khefacha S, Rejeb MB, Cheikh AB, Latiri HS. Connaissances et pratiques des étapes préalables à la stérilisation des dispositifs médicaux thermorésistants : Etude au Centre Hospitalo-Universitaire Sahloul, Sousse-Tunisie - 2022. Ann Pharm Fr 2024:S0003-4509(24)00060-9. [PMID: 38649136 DOI: 10.1016/j.pharma.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 03/09/2024] [Accepted: 04/15/2024] [Indexed: 04/25/2024]
Abstract
OBJECTIVES The standard process of central sterilization is crucial for the optimal functioning of the operating room. The outcome of this process is closely linked to the steps preceding the steps prior to the sterilization step itself. These steps include pre-disinfection carried out in the operating rooms and other stages, namely washing, drying and packaging, which must be performed in the central sterilization unit. In this context, this study aimed to describe the knowledge of the staff in the operating rooms and the central sterilization unit at Sahloul University Hospital in Sousse (Tunisia) in 2022, regarding the steps prior to the sterilization of reusable thermoresistant medical devices and to describe their practices in terms of compliance with these steps. METHOD A descriptive study was conducted from January 2022 to June 2022 with the aforementioned staff, using a self-administered questionnaire to assess their knowledge of the pre-sterilization steps and a direct observation audit of their practices with regard to these steps. Both measurement instruments were pre-tested. RESULTS Out of 102 self-administered questionnaires (knowledge assessment) distributed to the staff concerned, only 80 were returned and correctly filled out, giving a response rate of 78.4%. Participants' responses regarding the order of steps prior to the sterilization were incorrect in 64% of cases. With regard to the evaluation of professional practices, 224 observations were made in the study area (practice audit). In 82% of these observations, the pre-disinfection step was confused with the washing step. The use of Betadine brushes and scrubbing pads for device washing was noted in 89.3%, along with the absence of swabbing of the canals and hollow parts in 9.4% of cases and the absence of drying of the canals with compressed air. CONCLUSION Mastery of the steps prior to sterilisation of reusable thermoresistant medical devices was insufficient in our institution, suggesting the importance of reinforcing the implementation of the procedure through a continuous training program followed by action plans.
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Affiliation(s)
- Hela Ghali
- Service de Prévention et Sécurité des Soins, CHU Sahloul, Sousse, Tunisie; Université de Sousse, Faculté de Médecine de Sousse, Sousse, Tunisie
| | - Hela Bouhlel
- Médecine de Famille, Faculté de Médecine de Sousse, Sousse, Tunisie
| | - Sana Bhiri
- Service de Prévention et Sécurité des Soins, CHU Sahloul, Sousse, Tunisie; Université de Sousse, Faculté de Médecine de Sousse, Sousse, Tunisie
| | - Sondes Helal
- Ecole Supérieure des Sciences et Techniques de la Santé de Sousse, Sousse, Tunisie
| | - Chaima Zitouni
- Ecole Supérieure des Sciences et Techniques de la Santé de Sousse, Sousse, Tunisie
| | - Sarra Somaii
- Ecole Supérieure des Sciences et Techniques de la Santé de Sousse, Sousse, Tunisie
| | - Takwa Ben Othmen
- Service de Prévention et Sécurité des Soins, CHU Sahloul, Sousse, Tunisie
| | - Nouha Belhadj
- Médecine de Famille, Faculté de Médecine de Sousse, Sousse, Tunisie
| | - Omar Ben Saad
- Service de Prévention et Sécurité des Soins, CHU Sahloul, Sousse, Tunisie
| | - Salma Balhi
- Service de Prévention et Sécurité des Soins, CHU Sahloul, Sousse, Tunisie; Université de Sousse, Faculté de Médecine de Sousse, Sousse, Tunisie
| | - Salwa Khefacha
- Service de Prévention et Sécurité des Soins, CHU Sahloul, Sousse, Tunisie
| | - Mohamed Ben Rejeb
- Service de Prévention et Sécurité des Soins, CHU Sahloul, Sousse, Tunisie; Université de Sousse, Faculté de Médecine de Sousse, Sousse, Tunisie
| | - Asma Ben Cheikh
- Service de Prévention et Sécurité des Soins, CHU Sahloul, Sousse, Tunisie; Université de Sousse, Faculté de Médecine de Sousse, Sousse, Tunisie
| | - Houyem Said Latiri
- Service de Prévention et Sécurité des Soins, CHU Sahloul, Sousse, Tunisie; Université de Sousse, Faculté de Médecine de Sousse, Sousse, Tunisie
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6
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Cai S, Wen Y, Zhang Q, Zeng Q, Yang Q, Gao B, Tang G, Zeng Q. Four-in-one multifunctional self-driven photoelectrocatalytic system for water purification: Organics degradation, U(VI) reduction, electricity generation and disinfection against bacteria. Sci Total Environ 2024; 928:172353. [PMID: 38614351 DOI: 10.1016/j.scitotenv.2024.172353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/18/2024] [Accepted: 04/08/2024] [Indexed: 04/15/2024]
Abstract
This study addresses the energy-intensive nature of conventional wastewater treatment processes and proposes a solution through the development of a green, low-energy, and multifunctional wastewater treatment technology. The research focuses on a multifunctional self-driven photoelectrocatalytic (PEC) system, exploring its four-in-one applications in eliminating organic pollutants, reducing U(VI), generating electrical energy, and disinfecting pathogenic microorganisms. A TiO2-decorated carbon felt (CF@TiO2) cathode is synthesized to enhance interfacial charge transfer, with TiO2 coating improving surface binding sites (edge TiO and adsorbed -OH) for UO22+ adsorption and reduction. The self-driven PEC system, illuminated solely with simulated sunlight, exhibits remarkable efficiency in removing nearly 100 % of uranium within 0.5 h and simultaneously degrading 99.9 % of sulfamethoxazole (SMX) within 1.5 h, all while generating a maximum power output density (Pmax) of approximately 1065 μW·cm-2. The system demonstrates significant anti-interference properties across a wide pH range and coexisting ions. Moreover, 49.4 % of the fixed uranium on the cathode is reduced into U(IV) species, limiting its migration. The self-driven PEC system also excels in detoxifying various toxic organic compounds, including tetracycline, chlortetracycline, and oxytetracycline, and exhibits exceptional sterilization ability by disinfecting nearly 100 % of Escherichia coli within 0.5 h. This work presents an energy-saving, sustainable, and easily recyclable wastewater purification system with four-in-one capabilities, relying solely on sunlight for operation.
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Affiliation(s)
- Sixuan Cai
- School of Public Health, University of South China, Hengyang, Hunan 421001, China
| | - Yanjun Wen
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Qingyan Zhang
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Qingming Zeng
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Qingqing Yang
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Beibei Gao
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Guolong Tang
- School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China
| | - Qingyi Zeng
- School of Public Health, University of South China, Hengyang, Hunan 421001, China; School of Resources & Environment and Safety Engineering, University of South China, Hengyang 421001, PR China.
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7
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Mori H, Taketsuna Y, Shimogama K, Nishi K, Hara M. Interpenetrating gelatin/alginate mixed hydrogel: The simplest method to prepare an autoclavable scaffold. J Biosci Bioeng 2024:S1389-1723(24)00035-5. [PMID: 38570220 DOI: 10.1016/j.jbiosc.2024.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 01/11/2024] [Accepted: 01/21/2024] [Indexed: 04/05/2024]
Abstract
The choice of sterilization method for hydrogels used for cell culture influences the ease of preparing the gel. We prepared interpenetrating gelatin/calcium alginate hydrogels containing 1% (w/v) alginate and 1-16% (w/v) gelatin by molding with the mixture of gelatin/sodium alginate solution, followed by the addition of calcium ions by incubation in calcium chloride solution. It is the simplest method to prepare autoclavable gelatin/sodium hydrogel. We measured various properties of the hydrogels including volume, Young's modulus in the compression test, storage modulus, and loss modulus in the dynamic viscoelasticity measurement. The gelatin/alginate hydrogel can be easily fabricated into any shape by this method. After autoclave treatment, the hydrogel was shrunk to smaller than the original shape in similar figures. The shape of the gelatin/alginate hydrogel can be designed into any shape with the reduction ratio of the volume. Human osteosarcoma (HOS) cells adhered to the gelatin/alginate hydrogel and then proliferated. Gelatin/calcium alginate hydrogels with a high concentration are considered to be autoclavable culture substrates because of their low deformation and gelatin elution rate after autoclaving and the high amount of cells attached to the hydrogels.
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Affiliation(s)
- Hideki Mori
- Department of Biological Chemistry, Graduate School of Science, Osaka Metropolitan University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
| | - Yaya Taketsuna
- Department of Biological Chemistry, Graduate School of Science, Osaka Metropolitan University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
| | - Kae Shimogama
- Department of Biological Chemistry, Graduate School of Science, Osaka Metropolitan University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
| | - Koki Nishi
- Department of Biological Chemistry, Graduate School of Science, Osaka Metropolitan University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
| | - Masayuki Hara
- Department of Biological Chemistry, Graduate School of Science, Osaka Metropolitan University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan.
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Chang WK, Peng CL, Chen YW, Sun CK, Chen CC, Liu TC, Chu YY, Tsai IF, Chung CS, Lin HF, Hsu FY, Tai WC, Lee HC, Yen HH, Wang EM, Chen SH, Chu CH, Chen MJ, Lu CL, Chiu CT. Recommendations and guidelines for endoscope reprocessing: Current position statement of digestive endoscopic society of Taiwan. J Microbiol Immunol Infect 2024; 57:211-224. [PMID: 38135645 DOI: 10.1016/j.jmii.2023.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 10/23/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023]
Abstract
Reprocessing of gastrointestinal (GI) endoscopes and accessories is an essential part of patient safety and quality control in GI endoscopy centers. However, current endoscopic reprocessing guidelines or procedures are not adequate to ensure patient-safe endoscopy. Approximately 5.4 % of the clinically used duodenoscopes remain contaminated with high-concern microorganisms. Thus, the Digestive Endoscopy Society of Taiwan (DEST) sets standards for the reprocessing of GI endoscopes and accessories in endoscopy centers. DEST organized a task force working group using the guideline-revision process. These guidelines contain principles and instructions of step-by-step for endoscope reprocessing. The updated guidelines were established after a thorough review of the existing global and local guidelines, systematic reviews, and health technology assessments of clinical effectiveness. This guideline aims to provide detailed recommendations for endoscope reprocessing to ensure adequate quality control in endoscopy centers.
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Affiliation(s)
- Wei-Kuo Chang
- Division of Gastroenterology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taiwan
| | - Chen-Ling Peng
- Department of Integrated Diagnostics & Therapeutics, National Taiwan University Hospital, National Taiwan University College of Medicine, Taiwan
| | - Yen-Wei Chen
- Endoscopy Center for Diagnosis and Treatment, Taipei Veterans General Hospital, Taiwan
| | - Cheuk-Kay Sun
- Division of Hepatology and Gastroenterology, Department of Internal Medicine, Shin Kong Wu Ho-Su Memorial Hospital, Taipei 11101, Taiwan
| | - Chieh-Chang Chen
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, National Taiwan University Hospital, Taiwan
| | - Tao-Chieh Liu
- Division of Gastroenterology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taiwan
| | - Yin-Yi Chu
- Department of Gastroenterology and Hepatology, New Taipei Municipal Tucheng Hospital, Chang Gung University, Taoyuan, Taiwan
| | - I-Fang Tsai
- Ultrasonography and Endoscopy Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Chen-Shuan Chung
- Ultrasonography and Endoscopy Center, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Hsiao-Fen Lin
- Division of Gastroenterology and Hepatology, Renai Branch, Taipei City Hospital, Taiwan
| | - Fang-Yu Hsu
- Therapeutic Endoscopic Center, Department of Gastroenterology and Hepatology, Linkou Chang Gung Memorial Hospital, Taiwan
| | - Wei-Chen Tai
- Division of Hepato-Gastroenterology, Department of Internal Medicine, Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Hsi-Chang Lee
- Division of Gastroenterology and Hepatology, Renai Branch, Taipei City Hospital, Taiwan
| | - Hsu-Heng Yen
- Division of Gastroenterology, Changhua Christian Hospital, Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taiwan
| | - E-Ming Wang
- Department of Internal Medicine Division of Gastroenterology and Hepatology, Kaohsiung Veterans General Hospital, Taiwan
| | - Shu-Hui Chen
- Division of Gastroenterology, Changhua Christian Hospital, Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taiwan
| | - Cheng-Hsin Chu
- Division of Gastroenterology, Internal Medicine, MacKay Memorial Hospital, Taiwan
| | - Ming-Jen Chen
- Division of Gastroenterology, Internal Medicine, MacKay Memorial Hospital, Taiwan
| | - Ching-Liang Lu
- Endoscopy Center for Diagnosis and Treatment, Taipei Veterans General Hospital, Taiwan
| | - Cheng-Tang Chiu
- Department of Gastroenterology & Hepatology, Linkou Chang Gung Memorial Hospital, Chang Gung Medical Foundation, Taiwan.
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Yan H, Liu JH, Lu Y, Wu YH, Chen Z, Hu HY. Do all algae grow faster in environments replenished by reclaimed water? Examples of two effluents produced in Beijing. Sci Total Environ 2024; 919:170784. [PMID: 38340834 DOI: 10.1016/j.scitotenv.2024.170784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/28/2024] [Accepted: 02/05/2024] [Indexed: 02/12/2024]
Abstract
Reclaimed water with nitrogen, phosphorus, and other contaminants may trigger algal blooms during its ecological utilization in replenishing rivers or lakes. However, the effect of reclaimed water on algal growth rates is not well understood. In this study, the growth potentials of algae in terms of Cyanophyta, Chlorophyta, and Bacillariophyta, as well as mixed algae in both regular culture medium and reclaimed water produced from treatment plants in Beijing with similar N and P concentrations, were compared to evaluate whether reclaimed water could facilitate algal growth. In addition, reclaimed water was also sterilized to verify the impact of bacteria's presence on algal growth. The results indicated that most algae grew faster in reclaimed water, among which the growth rate of Microcystis aeruginosa even increased by 5.5 fold. The growth of mixed algae in reclaimed water was not enhanced due to the strong adaptive ability of the community structure. Residual bacteria in the reclaimed water were found to be important contributors to algal growth. This work provided theoretical support for the safe and efficient utilization of reclaimed water.
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Affiliation(s)
- Han Yan
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, China
| | - Jun-Han Liu
- Baowu Clean Energy Co., Ltd, Shanghai 201999, China
| | - Yun Lu
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, China; Beijing Laboratory for Environmental Frontier Technologies, Beijing 100084, China.
| | - Yin-Hu Wu
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, China; Beijing Laboratory for Environmental Frontier Technologies, Beijing 100084, China
| | - Zhuo Chen
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, China; Beijing Laboratory for Environmental Frontier Technologies, Beijing 100084, China.
| | - Hong-Ying Hu
- Environmental Simulation and Pollution Control State Key Joint Laboratory, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, China; Beijing Laboratory for Environmental Frontier Technologies, Beijing 100084, China; Research Institute for Environmental Innovation (Suzhou), Tsinghua University, Suzhou 215163, China
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10
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Wang H, Ding C, Lu J, Bao Y, Han B, Zhang J, Duan S, Song Z, Chen H. Study on the thawing characteristics of beef in ultrasound combined with plasma-activated water. Food Chem X 2024; 21:101104. [PMID: 38229670 PMCID: PMC10790005 DOI: 10.1016/j.fochx.2023.101104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/20/2023] [Accepted: 12/25/2023] [Indexed: 01/18/2024] Open
Abstract
The effects of deionized water thawing (DT), plasma-activated water thawing (PT), ultrasound (150 W, 40 kHz) combined with deionized water thawing (UDT), and ultrasound combined with plasma-activated water thawing (UPT) on the thawing characteristics and the physicochemical properties of the beef were investigated. The results showed that the UPT group had a faster thawing rate (38 % higher compared to the PT group) and good bactericidal ability (75 % higher compared to the UDT group), and had no adverse effect on the color and pH value of the beef. Plasma-activated water (PAW) can maintain the stability of the beef fiber, improve the water holding capacity (WHC), inhibit lipid oxidation, and reduce the loss of soluble substances such as protein. Therefore, UPT thawing is a promising meat thawing technology, which provides practical guidance and methods for the wide application of UPT in the field of meat thawing.
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Affiliation(s)
- Huixin Wang
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Changjiang Ding
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
- Electric Power College, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Jingli Lu
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Yuting Bao
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Bingyang Han
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Jie Zhang
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Shanshan Duan
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Zhiqing Song
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
- Electric Power College, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Hao Chen
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
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11
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Tan Z, Deng H, Ou H, Liao Z, Wu X, Liu R, Ou H. Microplastics and volatile organic compounds released from face masks after disinfection: Layers and materials differences. Sci Total Environ 2024; 917:170286. [PMID: 38280606 DOI: 10.1016/j.scitotenv.2024.170286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 01/11/2024] [Accepted: 01/17/2024] [Indexed: 01/29/2024]
Abstract
Effective disinfection methods are critical for ensuring the reusability of masks, yet these methods may inadvertently introduce health concerns associated with microplastics (MPs) and volatile organic compounds (VOCs). This study investigated the impact of ultraviolet germicidal irradiation (UVGI) and sodium hypochlorite (NaClO) bleaching on mask filter layers composed of four distinct materials. Our results revealed that UVGI induced more pronounced damage compared to bleaching, leading to the significant release of both MPs and VOCs. After UVGI treatment at conventional disinfection doses, meltblown (MB) fabrics released MPs reaching 864 ± 182 μg/g (92 ± 19 particles/g). For all filter layers, the quantity of released MPs followed the order: MB > HDPE>PU ≈ NW. These MPs were identified as degraded debris from the mask filter layers. The specific VOCs generated varied depending on the material composition. Non-woven (NW) and MB fabrics, both comprised of polypropylene, predominantly produced various branched aliphatic hydrocarbons and their derivative oxides. The cotton-like fabric, composed of high-density polyethylene, primarily emitted different linear aliphatic hydrocarbons and oxygenates. In contrast, the polyurethane filter layer of reusable masks released aromatic compounds, nitrogenous compounds, and their oxidation products. The formation of VOCs was primarily attributed to bond breakage and oxidative damage to the filter structure resulting from the disinfection process. In summary, as UVGI induced higher yields of MPs and VOCs compared to bleaching, the latter would be a safer option for mask disinfection.
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Affiliation(s)
- Zongyi Tan
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China; Center for Environmental Microplastics Studies, Jinan University, Guangzhou 511443, China
| | - Haiyang Deng
- CECEP Construction Engineering Design Institute Limited Company, Chengdu 610052, China
| | - Huali Ou
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China
| | - Zhianqi Liao
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China; Center for Environmental Microplastics Studies, Jinan University, Guangzhou 511443, China
| | - Xinni Wu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China; Center for Environmental Microplastics Studies, Jinan University, Guangzhou 511443, China
| | - Ruijuan Liu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China; Center for Environmental Microplastics Studies, Jinan University, Guangzhou 511443, China
| | - Huase Ou
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 511443, China; Center for Environmental Microplastics Studies, Jinan University, Guangzhou 511443, China.
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12
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Zhou X, Tian L, Wu H, Chen X, Zhang J, Li W, Qin H, Tao Z, Wang S, Liu Y. Reusable and self- sterilization mask for real-time personal protection based on sunlight-driven photocatalytic reaction. J Hazard Mater 2024; 466:133513. [PMID: 38262319 DOI: 10.1016/j.jhazmat.2024.133513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/25/2024]
Abstract
Personal protective masks play critical role in preventing the disease epidemic and resisting pathogenic bacterial infestation. However, large quantities of masks were disposed during COVID-19 epidemic, which caused environmental problem and huge economic burden. Herein, we developed reusable masks with inherent antimicrobial and self-cleaning features under solar irradiation. With spun-bonded nonwoven fabrics (SNF) layer as substrate, copper sulfide@polydopamine nanoparticles are deposited on SNF layer (CuS@PDANPs-SNF), which presents excellent photocatalytic activity. Under solar irradiation, CuS@PDANPs produce abundant of singly linear oxygen (1O2), which inactivates pathogenic bacteria with high efficiency over 99%. Interestingly, CuS@PDANPs-SNF cannot cause high temperature to bring any uncomfortable to the person, which is suitable for human to wear in daily life. Such design effectively protect person from the transmission of viral aerosol. Meanwhile, CuS@PDANPs-SNF masks are reusable and still maintain robust bactericidal ability after washing. The sunlight-mediated self-sterilization at low temperature endows CuS@PDANPs-SNF masks as powerful personal protective equipment for daily protection, which also provides an instructive way for reducing the environmental impact.
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Affiliation(s)
- Xiao Zhou
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Li Tian
- China Resources Biopharmaceutical Co., Ltd., Beijing 100120, PR China
| | - Haotian Wu
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Xiying Chen
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Jingjing Zhang
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Weiran Li
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Haijuan Qin
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Zhanhui Tao
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, PR China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, PR China
| | - Yaqing Liu
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, PR China.
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13
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Jiang J, Zou Y, Sun Q, Liu S, Sun M, Zheng H, Li H. Copolymers functionalized with quaternary ammonium compounds under template chain exhibit simultaneously efficient bactericidal and flocculation properties: Characterization, performance and mechanism. J Hazard Mater 2024; 465:133476. [PMID: 38232546 DOI: 10.1016/j.jhazmat.2024.133476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/25/2023] [Accepted: 01/07/2024] [Indexed: 01/19/2024]
Abstract
In this work, novel multifunctional cationic template copolymers with flocculation and sterilization capabilities were synthesized using a low-pressure ultraviolet (LP-UV) template polymerization method for the removal of kaolin and Escherichia coli (E. coli) from water. The influence of template agents on the structural performance of the copolymers was evaluated through characterization, which showed that template copolymer TPADM possesses a higher cationic charge density and a more complex rough surface, contributing to better flocculation performance than that of the non-template copolymer CPADM. Under optimal experimental conditions, TPADM-1 exhibited removal rates of 98.45% for kaolin and 99% for E. coli (OD600 =0.04), marginally outperforming the non-template copolymer. Simultaneously, TPADM-1 produced good adaptability to kaolin and E. coli wastewater in terms of wide pH, speculating that charge neutralization, adsorption bridging, patching, and sweeping simultaneously dominate the flocculation mechanism. Interestingly, SEM and 3D-EEM analysis confirm that the sterilization of E. coli occurs through two distinct functions: initially adsorption followed by subsequent cell membrane rupture and leakage of cellular contents, ultimately leading to cell death. This research further confirms the feasibility of the designed novel multifunctional copolymers for achieving simultaneous disinfection and turbidity removal, demonstrating practical applicability in real water treatment processes.
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Affiliation(s)
- Junyi Jiang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, PR China; Institute for Smart City of Chongqing University in Liyang, Chongqing University, Liyang, Jiangsu 213300, PR China
| | - Yuhong Zou
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, PR China; Institute for Smart City of Chongqing University in Liyang, Chongqing University, Liyang, Jiangsu 213300, PR China
| | - Qiang Sun
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, PR China; Institute for Smart City of Chongqing University in Liyang, Chongqing University, Liyang, Jiangsu 213300, PR China
| | - Shuang Liu
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, PR China; Institute for Smart City of Chongqing University in Liyang, Chongqing University, Liyang, Jiangsu 213300, PR China
| | - Manli Sun
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, PR China; Institute for Smart City of Chongqing University in Liyang, Chongqing University, Liyang, Jiangsu 213300, PR China
| | - Huaili Zheng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, PR China; Institute for Smart City of Chongqing University in Liyang, Chongqing University, Liyang, Jiangsu 213300, PR China.
| | - Hong Li
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, PR China; Institute for Smart City of Chongqing University in Liyang, Chongqing University, Liyang, Jiangsu 213300, PR China.
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14
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Kremer T, Rowan NJ, McDonnell G. A proposed cleaning classification system for reusable medical devices to complement the Spaulding classification. J Hosp Infect 2024; 145:88-98. [PMID: 38103694 DOI: 10.1016/j.jhin.2023.11.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 11/17/2023] [Accepted: 11/22/2023] [Indexed: 12/19/2023]
Abstract
A central tenet in infection prevention is application of the Spaulding classification system for the safe use of medical devices. Initially defined in the 1950s, this system defines devices and surfaces as being critical, semi-critical or non-critical depending on how they will be used on a patient. Different levels of antimicrobial treatment, defined as various levels of disinfection or sterilization, are deemed appropriate to reduce patient risk of infection. However, a focus on microbial inactivation is insufficient to address this concern, which has been particularly highlighted in routine healthcare facility practices, emphasizing the underappreciated importance of cleaning and achieving acceptable levels of cleanliness. A deeper understanding of microbiology has evolved since the 1950s, which has led to re-evaluation of the Spaulding classification along with a commensurate emphasis on achieving appropriate cleaning. Albeit underappreciated, cleaning has always been important as the presence of residual materials on surfaces can interfere with the efficacy of the antimicrobial process to inactivate micro-organisms, as well as other risks to patients including device damage, malfunction and biocompatibility concerns. Unfortunately, this continues to be relevant, as attested by reports in the literature on the occurrence of device-related infections and outbreaks due to failures in processing expectations. This reflects, in part, increasing sophistication in device features and reuse, along with commensurate manufacturer's instructions for use. Consequently, this constitutes the first description and recommendation of a new cleaning classification system to complement use of the traditional Spaulding definitions to help address these modern-day technical and patient risk challenges. This quantitative risk-based classification system highlights the challenge of efficient cleaning based on the complexity of device features present, as an isolated variable impacting cleaning. This cleaning classification can be used in combination with the Spaulding classification to improve communication of cleaning risk of a reusable medical device between manufacturers and healthcare facilities, and improve established cleaning practices. This new cleaning classification system will also inform future creation, design thinking and commensurate innovations for the sustainable safe reuse of important medical devices.
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Affiliation(s)
- T Kremer
- Centre for Sustainable Disinfection and Sterilization, Bioscience Research Institute, Technological University of the Shannon Midlands Midwest, Athlone, Ireland; Microbiological Quality and Sterility Assurance, Johnson & Johnson, Raritan, NJ, USA.
| | - N J Rowan
- Centre for Sustainable Disinfection and Sterilization, Bioscience Research Institute, Technological University of the Shannon Midlands Midwest, Athlone, Ireland; Department of Nursing and Healthcare, Technological University of the Shannon Midwest Mideast, Athlone, Ireland; SFI-funded CURAM Centre for Medical Device Research, University of Galway, Galway, Ireland
| | - G McDonnell
- Microbiological Quality and Sterility Assurance, Johnson & Johnson, Raritan, NJ, USA
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15
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Nicita F, Calapaj M, Alibrandi S, Donato L, Aquilio E, D'Angelo R, Sidoti A. Efficacy of an experimental gaseous ozone-based sterilization method for clear aligners. Angle Orthod 2024; 94:194-199. [PMID: 38381802 PMCID: PMC10893927 DOI: 10.2319/061623-421.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 11/01/2023] [Indexed: 02/23/2024] Open
Abstract
OBJECTIVES To assess effectiveness of an experimental sterilization method based on the exposure of an O3/O2 gas mixture directly inside the packaging for clear aligners. MATERIALS AND METHODS Fifty samples consisting of pieces of polyethylene terephthalate glycol (PET-G) aligners were contaminated by manual handling and subsequently divided into different groups (n = 30 for exposure to O3/O2 gas at different times, n = 10 for positive control with 2% chlorhexidine digluconate, n = 10 for negative control). The measurement of optical densities (OD) of the initial and final microbial cultures was recorded for all groups. Kruskal-Wallis test was used for differences between groups while Wilcoxon test was used to compare initial and final OD values within groups. Statistical significance was set at P < .05. RESULTS Comparison within the groups showed statistically significant differences for exposure to the gaseous mixture (72 hours), for positive and negative controls. Other significant differences were found in the multiple comparisons between the application of gaseous ozone (48 hours and 72 hours) and the negative control. CONCLUSIONS The direct exposure of gaseous ozone on the aligners inside their packaging showed microbicidal capacity at 72 hours, which was equivalent to the positive control with immersion in chlorhexidine digluconate. This innovative sterilization procedure could be considered in the final manufacturing processes of clear aligners to eliminate the potentially pathogenic microorganisms that are deposited on surfaces of these orthodontic devices.
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16
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Gao L, Guan M, Qin Y, Ji N, Wang Y, Li Y, Li M, Xiong L, Sun Q. Utilization of heat-induced curdlan gel to improve the cooking qualities of thermally sterilized fresh rice noodles. Int J Biol Macromol 2024; 262:129693. [PMID: 38278386 DOI: 10.1016/j.ijbiomac.2024.129693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 01/15/2024] [Accepted: 01/21/2024] [Indexed: 01/28/2024]
Abstract
Thermal sterilization is the most economical and efficient method to guarantee the shelf life of extruded fresh rice noodles, but it often leads to a high cooking breakage rate and poor elongation at break of the noodles. The aim of this study was to improve the edible quality of sterilized fresh rice noodles through the addition of low concentrations of curdlan (0.38 %-1.13 %), which can form a thermal-irreversible gel to resist high-temperature sterilization. Compared with the control group without curdlan, the cooking breakage rate of sterilized fresh rice noodles with 1.13 % curdlan decreased from 16.85 % to 5.22 %, the tensile strain increased from 91.15 % to 147.05 %, and the microstructure was more dense and uniform. The results showed that adding the proper amount of curdlan is an effective strategy to improve the quality of sterilized fresh rice noodles.
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Affiliation(s)
- Lin Gao
- College of Food Science and Engineering, Qingdao Agricultural University Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Minghang Guan
- College of Food Science and Engineering, Qingdao Agricultural University Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Yang Qin
- College of Food Science and Engineering, Qingdao Agricultural University Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China; Academy of Dongying Efficient Agricultural Technology and Industry on Saline and Alkaline Land in Collaboration with Qingdao Agricultural University, 257100, China
| | - Na Ji
- College of Food Science and Engineering, Qingdao Agricultural University Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China; Academy of Dongying Efficient Agricultural Technology and Industry on Saline and Alkaline Land in Collaboration with Qingdao Agricultural University, 257100, China
| | - Yanfei Wang
- College of Food Science and Engineering, Qingdao Agricultural University Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Yang Li
- College of Food Science and Engineering, Qingdao Agricultural University Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Man Li
- College of Food Science and Engineering, Qingdao Agricultural University Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Liu Xiong
- College of Food Science and Engineering, Qingdao Agricultural University Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China
| | - Qingjie Sun
- College of Food Science and Engineering, Qingdao Agricultural University Qingdao, Shandong Province 266109, China; Qingdao Special Food Research Institute, Qingdao 266109, China.
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17
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Zhang J, Cheng J, Li Z, Weng M, Zhang X, Tang X, Pan Y. Effects of ultra-high pressure, thermal pasteurization, and ultra-high temperature sterilization on color and nutritional components of freshly-squeezed lettuce juice. Food Chem 2024; 435:137524. [PMID: 37832336 DOI: 10.1016/j.foodchem.2023.137524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 09/14/2023] [Accepted: 09/16/2023] [Indexed: 10/15/2023]
Abstract
The aim of this study was to evaluate the effects of ultra-high pressure (UHP, 600 MPa/2 min), thermal pasteurization (TP, 95 °C/1 min) and ultra-high temperature (UHT, 115 °C/5 s) sterilization on the color, sensory evaluation, microorganisms, physicochemical characteristics and nutritional components of freshly-squeezed lettuce juice (FLJ). Results showed that three sterilization methods demonstrated desirable inactivation effects on total aerobic bacteria, yeast and mold, and there were no significant changes in the main nutritional components, including ash, protein, carbohydrate and total dietary fiber. However, UHT and TP significantly affected the color of FLJ from bright green to light brown and made chlorophyll, β-carotene and vitamins (VE, VC, VK1, VB6, VB12, and folic acid) contents markedly decreased. By contrast, UHP maintained the original color, fresh-like sensory qualities, vitamins, and carotene of FLJ to the greatest extent. Our results provide a promising application of UHP in the large-scale processing of FLJ.
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Affiliation(s)
- Jiadi Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China; College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Jinxiao Cheng
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China; College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Zhixuan Li
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Mengting Weng
- Institute of Edible Mushroom, Fujian Academy of Agricultural Sciences, Fuzhou 350014, China
| | - Xudong Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xuanming Tang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yanfang Pan
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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18
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Eveland R, Antloga K, Meyer A, Tuscano L. Low temperature vaporized hydrogen peroxide sterilization of 3D printed devices. 3D Print Med 2024; 10:6. [PMID: 38416324 PMCID: PMC10900786 DOI: 10.1186/s41205-024-00206-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 02/12/2024] [Indexed: 02/29/2024] Open
Abstract
BACKGROUND Low temperature vaporized hydrogen peroxide sterilization (VH2O2) is used in hospitals today to sterilize reusable medical devices. VH2O2 sterilized 3D printed materials were evaluated for sterilization, biocompatibility and material compatibility. MATERIALS & METHODS Test articles were printed at Formlabs with BioMed Clear™ and BioMed Amber™, and at Stratasys with MED610™, MED615™ and MED620™. Sterilization, biocompatibility and material compatibility studies with 3D printed materials were conducted after VH2O2 sterilization in V-PRO™ Sterilizers. The overkill method was used to evaluate sterilization in a ½ cycle. Biocompatibility testing evaluated the processed materials as limited contact (< 24-hours) surface or externally communicating devices. Material compatibility after VH2O2 sterilization (material strength and dimensionality) was evaluated via ASTM methods and dimensional analysis. RESULTS 3D printed devices, within a specific design window, were sterile after VH2O2 ½ cycles. After multiple cycle exposure, the materials were not cytotoxic, not sensitizing, not an irritant, not a systemic toxin, not pyrogenic and were hemo-compatible. Material compatibility via ASTM testing and dimensionality evaluations did not indicate any significant changes to the 3D printed materials after VH2O2 sterilization. CONCLUSION Low temperature vaporized hydrogen peroxide sterilization is demonstrated as a suitable method to sterilize 3D printed devices. The results are a subset of the data used in a regulatory submission with the US FDA to support claims for sterilization of 3D printed devices with specified materials, printers, and device design 1.
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Affiliation(s)
| | | | - Ashley Meyer
- STERIS, 5960 Heisley Road, Mentor, OH, 44060, USA
| | - Lori Tuscano
- STERIS, 5960 Heisley Road, Mentor, OH, 44060, USA
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Ulusoy S, Basturk FB, Turkaydın D, Garip Berker Y, Gunday M, Durmazpınar PM. Cutting efficiency and corrosion resistance of heat-treated endodontic files after various disinfection protocols. Odontology 2024:10.1007/s10266-023-00896-9. [PMID: 38381265 DOI: 10.1007/s10266-023-00896-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 12/27/2023] [Indexed: 02/22/2024]
Abstract
The aim of this study is to evaluate the effect of various disinfection protocols on the cutting efficiency and chemical composition of ProTaper, Twisted File, Twisted File Adaptive, and Hedström files. Four experimental groups (n = 10) were presoaked in either enzymatic solution or 1% sodium hypochlorite for 30 min, followed by either 5 or 15 min of ultrasonic cleaning and then autoclaved. Resin-simulated canals with a single curvature of 38-40° were prepared by each instrument system. Cutting efficiency of each instrument was analyzed by subtracting the final weight from the initial weight of the resin blocks. Chemical compositions were studied by field emission scanning electron microscopy and X-ray energy-dispersive spectrometry. The cutting efficiency of Hedström, ProTaper, and Twisted File instruments decreased compared to their control groups (p < 0.05) whereas it did not change for Twisted File Adaptive. More corrosion was detected with longer ultrasonication time. No difference was observed regarding the pre-soaking media. Disinfection protocols exerted a significant overall effect on the performance of Hedström, ProTaper, and Twisted File instruments. Corrosion, microcracks, and crevices were evident on all tested instruments after disinfection protocols applied. All disinfection protocols, regardless of the pre-soaking media used or the ultrasonic cleaning time applied, have some effect on the cutting efficiency and the surface characteristics of the files.
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Affiliation(s)
- Seyma Ulusoy
- Department of Endodontics, Faculty of Dentistry, Marmara University, Başıbüyük Yolu Marmara Üniversitesi Başıbüyük Sağlık Yerleşkesi 9/3, Başıbüyük, Maltepe, P.O. Box: 34854, Istanbul, Turkey
| | - Fatima Betül Basturk
- Department of Endodontics, Faculty of Dentistry, Istanbul Gelisim University, Prof. Dr. Cavit Orhan Tütengil Sk. No: 4, Fatih, Süleymaniye, Istanbul, 34116, Turkey
| | - Dilek Turkaydın
- Department of Endodontics, Faculty of Dentistry, Marmara University, Başıbüyük Yolu Marmara Üniversitesi Başıbüyük Sağlık Yerleşkesi 9/3, Başıbüyük, Maltepe, P.O. Box: 34854, Istanbul, Turkey
| | - Yıldız Garip Berker
- Department of Endodontics, Faculty of Dentistry, Istanbul Biruni University, Kazlıçeşme, Cinoğlu Çk. No:2, Zeytinburnu, Istanbul, 34020, Turkey
| | - Mahir Gunday
- Department of Endodontics, Faculty of Dentistry, Istanbul Gelisim University, Prof. Dr. Cavit Orhan Tütengil Sk. No: 4, Fatih, Süleymaniye, Istanbul, 34116, Turkey
| | - Parla Meva Durmazpınar
- Department of Endodontics, Faculty of Dentistry, Marmara University, Başıbüyük Yolu Marmara Üniversitesi Başıbüyük Sağlık Yerleşkesi 9/3, Başıbüyük, Maltepe, P.O. Box: 34854, Istanbul, Turkey.
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20
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Garcia-Alexander G, Thompson M. Judgment, shame, and coercion: the criminal legal system and reproductive autonomy. Health Justice 2024; 12:6. [PMID: 38363420 PMCID: PMC10870550 DOI: 10.1186/s40352-024-00259-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 01/22/2024] [Indexed: 02/17/2024]
Abstract
BACKGROUND A growing body of research has called attention to limitations to reproductive autonomy in both women who are socially disadvantaged and in those who have had contact with the criminal legal (CL) system. However, it is unclear whether CL system contact influences contraceptive use patterns and how these processes unfold. We utilize a mixed-methods approach to investigate whether history of arrest is associated with receipt of contraceptive counseling, use of long-term contraception, sterilization, and subsequent desire for reversal of sterilization. We further consider how agents in and around the CL system may influence women's reproductive decisions and outcomes (856 survey respondents; 10 interviewees). RESULTS We observe that women who have been arrested more commonly report receipt of contraceptive counseling and sterilization. They are also significantly more likely to want their sterilization reversed. Our in-depth interviews suggest that women with CL contact experience considerable shame, and in some cases, coercion to limit fertility from various agents in and outside the criminal legal system including medical providers, Parole/Probation Officers (POs), guards, and family members. CONCLUSIONS Our findings suggest the need for ongoing attention to how exposure to this system may promote uneven use of certain forms of contraception and dissatisfaction, i.e., desire for reversal of sterilization, among these women. Findings further suggest that de-emphasizing the CL system as a means through which to address reproductive needs should be considered.
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Affiliation(s)
- Ginny Garcia-Alexander
- Department of Sociology, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA.
| | - Melissa Thompson
- Department of Sociology, Portland State University, P.O. Box 751, Portland, OR, 97201, USA
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21
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Penoy N, Delma KL, Homkar N, Karim Sakira A, Egrek S, Sacheli R, Sacré PY, Grignard B, Hayette MP, Somé TI, Semdé R, Evrard B, Piel G. Development and optimization of a one step process for the production and sterilization of liposomes using supercritical CO 2. Int J Pharm 2024; 651:123769. [PMID: 38181994 DOI: 10.1016/j.ijpharm.2024.123769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/21/2023] [Accepted: 01/02/2024] [Indexed: 01/07/2024]
Abstract
Liposomes are very interesting drug delivery systems for pharmaceutical and therapeutic purposes. However, liposome sterilization as well as their industrial manufacturing remain challenging. Supercritical carbon dioxide is an innovative technology that can potentially overcome these limitations. The aim of this study was to optimize a one-step process for producing and sterilizing liposomes using supercritical CO2. For this purpose, a design of experiment was conducted. The analysis of the experimental design showed that the temperature is the most influential parameter to achieve the sterility assurance level (SAL) required for liposomes (≤10-6). Optimal conditions (80 °C, 240 bar, 30 min) were identified to obtain the fixed critical quality attributes of liposomes. The conditions for preparing and sterilizing empty liposomes of various compositions, as well as liposomes containing the poorly water-soluble drug budesonide, were validated. The results indicate that the liposomes have appropriate physicochemical characteristics for drug delivery, with a size of 200 nm or less and a PdI of 0.35 or less. Additionally, all liposome formulations demonstrated the required SAL and sterility at concentrations of 5 and 45 mM, with high encapsulation efficiency.
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Affiliation(s)
- Noémie Penoy
- Laboratory of Pharmaceutical Technology and Biopharmacy, Development of Nanomedicine, Center for Interdisciplinary Research on Medicines (CIRM), University of Liege, Avenue Hippocrate 15, 4000 Liege, Belgium; FRITCO(2)T (Federation of Researchers in Innovative Technologies for CO(2) Transformation), University of Liege, Sart-Tilman B6a, Liege 4000, Belgium
| | - Kouka Luc Delma
- Laboratory of Pharmaceutical Technology and Biopharmacy, Development of Nanomedicine, Center for Interdisciplinary Research on Medicines (CIRM), University of Liege, Avenue Hippocrate 15, 4000 Liege, Belgium; Laboratory of Drug Development, Doctoral School of Sciences and Health, University Joseph KI-ZERBO, 03 BP 7021 Ouagadougou 03, Burkina Faso
| | - Nirmayi Homkar
- Laboratory of Pharmaceutical Technology and Biopharmacy, Development of Nanomedicine, Center for Interdisciplinary Research on Medicines (CIRM), University of Liege, Avenue Hippocrate 15, 4000 Liege, Belgium
| | - Abdoul Karim Sakira
- Laboratoire de Toxicologie, Environnement et Santé (LATES), Ecole Doctorale des Sciences de La Santé (ED2S), Université Joseph KI-ZERBO, 03 BP 7021 03 Ouagadougou, Burkina Faso
| | - Sabrina Egrek
- Laboratory of Clinical Microbiology, Center for Interdisciplinary Research on Medicines (CIRM), University of Liège, Avenue Hippocrate 15, 4000 Liege, Belgium
| | - Rosalie Sacheli
- Laboratory of Clinical Microbiology, Center for Interdisciplinary Research on Medicines (CIRM), University of Liège, Avenue Hippocrate 15, 4000 Liege, Belgium
| | - Pierre-Yves Sacré
- Research Support Unit in Chemometrics, Center for Interdisciplinary Research on Medicines (CIRM), University of Liege, Avenue Hippocrate 15, 4000 Liege, Belgium
| | - Bruno Grignard
- FRITCO(2)T (Federation of Researchers in Innovative Technologies for CO(2) Transformation), University of Liege, Sart-Tilman B6a, Liege 4000, Belgium
| | - Marie-Pierre Hayette
- Laboratory of Clinical Microbiology, Center for Interdisciplinary Research on Medicines (CIRM), University of Liège, Avenue Hippocrate 15, 4000 Liege, Belgium
| | - Touridomon Issa Somé
- Laboratoire de Toxicologie, Environnement et Santé (LATES), Ecole Doctorale des Sciences de La Santé (ED2S), Université Joseph KI-ZERBO, 03 BP 7021 03 Ouagadougou, Burkina Faso
| | - Rasmané Semdé
- Laboratory of Drug Development, Doctoral School of Sciences and Health, University Joseph KI-ZERBO, 03 BP 7021 Ouagadougou 03, Burkina Faso
| | - Brigitte Evrard
- Laboratory of Pharmaceutical Technology and Biopharmacy, Development of Nanomedicine, Center for Interdisciplinary Research on Medicines (CIRM), University of Liege, Avenue Hippocrate 15, 4000 Liege, Belgium
| | - Géraldine Piel
- Laboratory of Pharmaceutical Technology and Biopharmacy, Development of Nanomedicine, Center for Interdisciplinary Research on Medicines (CIRM), University of Liege, Avenue Hippocrate 15, 4000 Liege, Belgium.
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22
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S S Schneider D, de Magalhães AMM, de Oliveira JLC, Costanzi AP, Nora CRD, Trevilato DD. Integrity and filtration efficiency of decontaminated N95/PFF2 masks to protect health care professionals against COVID-19: A systematic literature review and meta-analysis. Am J Infect Control 2024:S0196-6553(24)00059-2. [PMID: 38342344 DOI: 10.1016/j.ajic.2024.01.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 01/27/2024] [Accepted: 01/31/2024] [Indexed: 02/13/2024]
Abstract
BACKGROUND To evaluate the evidence related to maintaining the integrity and filtration efficiency of N95 and/or PFF2 respirators after decontamination in health care professionals' protection against COVID-19. METHODS Systematic review, developed based on the guidelines from Joanna Briggs Institute for syntheses focusing on effectiveness evidence. The protocol was registered on the International Prospective Register of Ongoing Systematic Reviews platform, under the number CRD42022354256. This study report was developed in accordance with the guidelines recommended by the Preferred Reporting Items for Systematic Reviews and Meta-Analysis Publications between January 2020 and August 2022 were selected of Embase, Medline, CINAHL, Web of Science, Cochrane, SciELO and Virtual Health Library databases. Joanna Briggs critical appraisal tool for nonrandomized experimental tests was used to evaluate the evidence quality. RESULTS Seven articles were included in the data extraction and critical evaluation, and 3 in the meta-analysis. Four studies evaluated the integrity by visual inspection and 2 by electron microscopy. There was no association between the number of cycles increase and the reduction in filtration in up to 10 cycles. None study was considered of high methodological quality. CONCLUSIONS There is some evidence that integrity and filtration capacity were maintained after decontamination of N95/PFF2 respirators to prevent COVID-19.
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Affiliation(s)
- Daniela S S Schneider
- PhD in Nursing at the Federal University of Rio Grande do Sul (UFRGS), Master in Genetics and Toxicology, Specialist in Operations Management for Health, Nursing Manager of the Central sterile services department (CSSD) of the Hospital de Clínicas de Porto Alegre (HCPA), Member of the Center for Nursing Management Studies (NEGE), Porto Alegre, Rio Grande do Sul, Brazil; PhD student in Nursing at the Federal University of Rio Grande do Sul (UFRGS), Master in Health Teaching, Nurse Assistant of the Surgical Center department of the Hospital Moinhos de Vento (RS), Assistant Professor of the Undergraduate Nursing Course of the Moinhos de Vento Health Sciences College, Porto Alegre, Rio Grande do Sul, Brazil.
| | - Ana M M de Magalhães
- Director of the School of Nursing of the Federal University of Rio Grande do Sul (UFRGS), Associate Professor of the Department of Assistance and Professional Orientation, DAOP, Permanent Professor of the Postgraduate Program in Nursing (PPGENF-UFRGS), Coordinator of the Center for Nursing Management Studies (NEGE), Porto Alegre, Rio Grande do Sul, Brazil.
| | - Joao L C de Oliveira
- Adjunct Professor, Department of Assistance and Professional Guidance, DAOP of the School of Nursing, Federal University of Rio Grande do Sul (UFRGS), Assistant Professor of the Service of Clinical Nursing of the Nursing Department of the Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Rio Grande do Sul, Brazil.
| | | | - Carlise R D Nora
- Adjunct Professor, Department of Assistance and Professional Guidance, DAOP, School of Nursing, Federal University of Rio Grande do Sul (UFRGS), Advisory Professor at the Nursing Service in Surgical Center (SECC) of the Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, Rio Grande do Sul, Brazil.
| | - Denilse D Trevilato
- PhD student in Nursing at the Federal University of Rio Grande do Sul (UFRGS), Master in Health Teaching, Nurse Assistant of the Surgical Center department of the Hospital Moinhos de Vento (RS), Assistant Professor of the Undergraduate Nursing Course of the Moinhos de Vento Health Sciences College, Porto Alegre, Rio Grande do Sul, Brazil.
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23
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Feng Y, Suo K, Zhang Y, Yang Z, Zhou C, Shi L, Chen W, Wang J, Wang C, Zheng Y. Ultrasound synergistic slightly acidic electrolyzed water treatment of grapes: Impacts on microbial loads, wettability, and postharvest storage quality. Ultrason Sonochem 2024; 103:106751. [PMID: 38241946 PMCID: PMC10825514 DOI: 10.1016/j.ultsonch.2023.106751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 12/26/2023] [Accepted: 12/30/2023] [Indexed: 01/21/2024]
Abstract
Microbial contamination is the principal factor in the deterioration of postharvest storage quality in grapes. To mitigate this issue, we explored a synergistic treatment which combines ultrasound (US) and slightly acidic electrolyzed water (SAEW), and rigorously compared with conventional water cleaning (CW), exclusive US treatment, and standalone SAEW treatment. The US + SAEW treatment proved to be markedly superior in reducing total bacterial, mold & yeast counts on grapes. Specifically, it achieved reductions of 2.23 log CFU/g and 2.76 log CFU/g, respectively, exceeding the efficiencies of SAEW (0.78, 0.75), US (0.58, 0.65), and CW (0.24, 0.46). The efficacy of this synergistic treatment is attributed to the ultrasound removal of the wax layer on grape skins, which transitions the skin from hydrophobic to hydrophilic. This alteration increases the contact area between the grape surface and SAEW, thereby enhancing the antimicrobial efficacy of SAEW. From a physicochemical quality standpoint, the US + SAEW treatment exhibited multiple advantages. It not only minimized weight loss, color deviations, polyphenol oxidase activity and malondialdehyde synthesis in comparison to CW-treated samples but also preserved firmness, sugar-acid ratio and the activities of key enzymes including phenylalanine ammonia-lyase, superoxide dismutase and catalase, and thus maintaining high levels of total phenolics, total ascorbic acid, total anthocyanins, and antioxidants. Consequently, US + SAEW treatment put off the times of decay onset in grapes by 12 days, outperforming both SAEW (8) and US (4) in comparison to CW. These results highlight the potential of US + SAEW as an effective strategy for maintaining grape quality during their postharvest storage period.
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Affiliation(s)
- Yabin Feng
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China; Haitong Food (Ninghai) Co., Ltd, Ningbo 315602, China.
| | - Kui Suo
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Yang Zhang
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Zhenfeng Yang
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China.
| | - Cunshan Zhou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Liyu Shi
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | - Wei Chen
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China
| | | | - Caiying Wang
- Haitong Food (Ninghai) Co., Ltd, Ningbo 315602, China
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24
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Zhao W, Gao Q, Cao Y, Meng Y, He J. Kinetics of sterilization of atomized slightly acidic electrolyzed water on tableware. Heliyon 2024; 10:e24721. [PMID: 38312634 PMCID: PMC10835237 DOI: 10.1016/j.heliyon.2024.e24721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/05/2023] [Accepted: 01/12/2024] [Indexed: 02/06/2024] Open
Abstract
The aim of this study was to elucidate the kinetics of atomization of slightly acidic electrolyzed water (SAEW) for use in sterilization of secondary contaminated tableware surfaces. The sterilization efficacy of SAEW was assessed on the basis of the change in the total number of colonies with different contamination levels (101 CFU/mL and 102 CFU/mL), atomization time (10, 20, 30, 40, and 50 s), atomizing distance (5, 10, 15, 20, 25, and 30 cm), and available chlorine concentration (ACC; 25.2, 30.2, 34.9, 40.5, 44.8, and 53.3 mg/L) as the main influencing factors. According to the relationship among flux, atomization area, and time, a kinetic model of SAEW atomization for the sterilization of tableware surfaces was established. The results indicated that the sterilization efficacy of SAEW gradually improved with decreased contamination levels (12.69 %-15.74 %), extended atomization time (13.68 %-46.58 %), and increased ACC (36.89 %-95.14 %). Based on the kinetics analysis, the change law of the kinetic model of SAEW atomization and sterilization of tableware surfaces with secondary pollution was found to be consistent with the change law of sterilization (r2 > 0.8). The results of this study provide a theoretical basis for SAEW atomization for sterilization of secondary contaminated tableware surfaces and also contributes to the improvement of technological theory of SAEW sterilization.
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Affiliation(s)
| | | | - Yu Cao
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201, China
| | - Yuanyan Meng
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201, China
| | - Jinsong He
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201, China
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25
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Hoffman D, Cool C. Costs involved in compliance with new endoscope reprocessing guidelines. Clin Endosc 2024:ce.2023.164. [PMID: 38273218 DOI: 10.5946/ce.2023.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 09/21/2023] [Indexed: 01/27/2024] Open
Abstract
Background/Aims In March 2022, the Association for the Advancement of Medical Instrumentation (AAMI) released the American National Standards Institute (ANSI)/AAMI ST91:2021, their latest update on comprehensive, flexible, and semirigid endoscope reprocessing. These updated standards recommend the sterilization of high-risk endoscopes when possible and provide new recommendations for the precleaning, leak testing, manual cleaning, visual inspection, automated reprocessing, drying, storage, and transport of endoscopes. Methods ANSI/AAMI ST91:2021 was compared with ANSI/AAMI ST91:2015 for major reprocessing differences that result in either time and/or cost increases. Time estimates were captured by explicit recommendation inclusion or taken from the literature. All the costs were estimated using publicly available resources. Results The updated standards represent a potential 24.3-minute and 52.35 to 67.57 United States dollars increase per procedure in terms of reprocessing time and spending, respectively, not including capital investments. Capital costs per procedure were highly dependent on the procedure volume of the facility. Conclusions The new AAMI standards recommend several major changes, such as sterilization, for facilities to reprocess and manage endoscopes between uses. As more facilities increase their reprocessing methods to reflect the updated standards, they do so at a cost and introduce several delays. As the reprocessing landscape evolves, facilities should consider their true costs and alternative solutions, such as single-use endoscopes.
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Affiliation(s)
- David Hoffman
- Health Economics Outcomes Research and Market Access, Ambu USA, Columbia, MD, USA
| | - Christina Cool
- Health Economics Outcomes Research and Market Access, Ambu USA, Columbia, MD, USA
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Qin Z, Yin S, She P, Kong L, Yang X, Sun H. Cotton Cloth@ Polydimethylsiloxane -Graphene Flakes- Titanium Dioxide Composite Membrane for Wastewater Purification. J Colloid Interface Sci 2024; 654:1251-1259. [PMID: 37907004 DOI: 10.1016/j.jcis.2023.10.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/11/2023] [Accepted: 10/11/2023] [Indexed: 11/02/2023]
Abstract
Interfacial solar steam generation (ISSG) has been regarded as a simple and highly-efficient method for wastewater purification. Herein, we prepared a superhydrophobic composite membrane, in which polydimethylsiloxane employed as binders to pack graphite flakes and titanium dioxide tightly onto cotton cloth (defined as cotton cloth@PDMS-C-P25). Benefiting from its powerful photothermal effects, cotton cloth@PDMS-C-P25 exhibited high evaporation flux of 1.86 kg m-2 h-1 and 1.73 kg m-2 h-1 for pure water and seawater, respectively. Meanwhile, the prepared composite membrane fulfilled the targets of sewage purification set by its photocatalytic properties, which demonstrated a degradation rate of 66.1 % for Rhodamine B (RhB), and antibacterial efficiency of over 99.99 % for Escherichia coli (E. coli). Furthermore, cotton cloth@PDMS-C-P25 surface was endowed with superhydrophobic and low-adhesion characteristics mainly owing to the synergy of multiscale structure and low surface energy matter, which contribute to the anti-adhesion effect of 97.9 % for E. coli at a high concentration of 107 colony forming units (CFUs). In this work, the cost-effective, environmentally friendly, long-term stable, and superhydrophobic solar-absorber holds a potential prospect for wastewater treatment and desalination in a typical pollution-induced water shortage area.
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Affiliation(s)
- Zhen Qin
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, China
| | - Shengyan Yin
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, China
| | - Ping She
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, International Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | - Liang Kong
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, China
| | - Xiangyu Yang
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, China
| | - Hang Sun
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, China.
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27
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Wang X, Wang J, Liu S, Dou M, Gao B. Sterilization mechanism and nanotoxicity of visible light-driven defective carbon nitride and UV-excited TiO 2. J Hazard Mater 2024; 461:132109. [PMID: 37734307 DOI: 10.1016/j.jhazmat.2023.132109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 07/05/2023] [Accepted: 07/19/2023] [Indexed: 09/23/2023]
Abstract
The sterilization effect of photocatalysis and biotoxicity of nanomaterial catalysts have attracted high attention. In this study, the novel visible-driven defective carbon nitride (VL/DCN) system exhibits non-photoreactivation, non-toxic superior performance compared with traditional ultraviolet radiation (UV) and UV/titanium dioxide (UV/TiO2). The inactivation of antibiotic-resistant bacteria (ARB) by novel VL/DCN still reached 7 log within 4 h, and the reduction rates of aminoglycoside gene strB and tetracycline gene tetA exceeded 0.8 log and 1.2 log, respectively. Further, the sterilization mechanism and nanotoxicity were contrastively and systematically analyzed among above three systems as following. Firstly, in the VL/DCN system, reactive oxygen species (ROSs) generated from photocatalytic process leads to the destruction of cell membranes, resulting in dissolving out of potassium ion (K+), protein and cell membrane ATP content. Thus, resistant bacteria were completely inactivated and photoreactivation disappears. In contrast, the UV only acted on bacterial DNA and existed the light resurrection. The UV/TiO2 strictly dependent on ultraviolet light and can be used in limited scenarios. Secondly, in cell viability analysis by human lung cell line BEAS-2B experiments, the 10% inhibition of cell growth when DCN was 600 mg/L much lower than 28% inhibition of cell growth when TiO2 was only 200 mg/L. The expression of pro-inflammatory cytokines ((Interleukin, IL) -6), IL-8, IL-1β) under the effect of DCN was 1.5-fold, 5.7-fold and 3.7-fold lower than TiO2, respectively. Meanwhile, DCN induced cells to produce less ROSs, malondialdehyde (MDA), and more superoxide dismutase (SOD). Above results demonstrated that DCN has far lower cytotoxicity than TiO2. This study provides theoretical support for the application of photocatalytic sterilization technology and the exploration of the toxicity of nanomaterials.
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Affiliation(s)
- Xiaoyue Wang
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Haidian District, Beijing 100044, China
| | - Jin Wang
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Haidian District, Beijing 100044, China.
| | - Shanjun Liu
- Jinan Environmental Research Academy, Jinan 250102, China
| | - Mengmeng Dou
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Haidian District, Beijing 100044, China
| | - Boru Gao
- China International Engineering Consulting Corporation, Beijing 100048, China
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28
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Wang Y, Lin Y, He S, Wu S, Yang C. Singlet oxygen: Properties, generation, detection, and environmental applications. J Hazard Mater 2024; 461:132538. [PMID: 37734310 DOI: 10.1016/j.jhazmat.2023.132538] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 09/01/2023] [Accepted: 09/11/2023] [Indexed: 09/23/2023]
Abstract
Singlet oxygen (1O2) is molecular oxygen in the excited state with high energy and electrophilic properties. It is widely found in nature, and its important role is gradually extending from chemical syntheses and medical techniques to environmental remediation. However, there exist ambiguities and controversies regarding detection methods, generation pathways, and reaction mechanisms which have hindered the understanding and applications of 1O2. For example, the inaccurate detection of 1O2 has led to an overestimation of its role in pollutant degradation. The difficulty in detecting multiple intermediate species obscures the mechanism of 1O2 production. The applications of 1O2 in environmental remediation have also not been comprehensively commented on. To fill these knowledge gaps, this paper systematically discussed the properties and generation of 1O2, reviewed the state-of-the-art detection methods for 1O2 and long-standing controversies in the catalytic systems. Future opportunities and challenges were also discussed regarding the applications of 1O2 in the degradation of pollutants dissolved in water and volatilized in the atmosphere, the disinfection of drinking water, the gas/solid sterilization, and the self-cleaning of filter membranes. This review is expected to provide a better understanding of 1O2-based advanced oxidation processes and practical applications in the environmental protection of 1O2.
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Affiliation(s)
- Yue Wang
- College of Environmental Science and Engineering, Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Gongshang University, Hangzhou, Zhejiang 310012, China; College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China
| | - Yan Lin
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China
| | - Shanying He
- College of Environmental Science and Engineering, Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Gongshang University, Hangzhou, Zhejiang 310012, China.
| | - Shaohua Wu
- Academy of Environmental and Resource Sciences, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China.
| | - Chunping Yang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China; Academy of Environmental and Resource Sciences, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China; School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, Jiangxi 330063, China.
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29
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Kim J, So B, Heo Y, So H, Jo JK. Advances in Male Contraception: When Will the Novel Male Contraception be Available? World J Mens Health 2024; 42:42.e1. [PMID: 38164023 DOI: 10.5534/wjmh.230118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/18/2023] [Accepted: 07/26/2023] [Indexed: 01/03/2024] Open
Abstract
Many contraceptive methods have been developed over the years due to high demand. However, female contraceptive pills and devices do not work for all females due to health conditions and side effects. Also, the number of males who want to actively participate in family planning is gradually increasing. However, the only contraceptive options currently available to males are condoms and vasectomy. Therefore, many male contraceptive methods, including medication (hormonal and non-hormonal therapy) and mechanical methods, are under development. Reversibility, safety, persistence, degree of invasion, promptness, and the suppression of anti-sperm antibody formation are essential factors in the development of male contraceptive methods. In this paper, male contraceptive methods under development are reviewed according to those essential factors. Furthermore, the timeline for the availability of a new male contraception is discussed.
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Affiliation(s)
- Jongwon Kim
- Department of Medical and Digital Engineering, Hanyang University, Seoul, Korea
| | - Byeongchan So
- Department of Medical and Digital Engineering, Hanyang University, Seoul, Korea
| | - Yongki Heo
- Department of Medical and Digital Engineering, Hanyang University, Seoul, Korea
| | - Hongyun So
- Department of Medical and Digital Engineering, Hanyang University, Seoul, Korea
- Institute of Nano Science and Technology, Hanyang University, Seoul, Korea
- Department of Mechanical Engineering, Hanyang University, Seoul, Korea.
| | - Jung Ki Jo
- Department of Medical and Digital Engineering, Hanyang University, Seoul, Korea
- Department of Urology, College of Medicine, Hanyang University, Seoul, Korea.
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30
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Zhang L, Wang W, He W, Du T, Wang S, Hu P, Pan B, Jin J, Liu L, Wang J. A tailored slow-release film with synergistic antibacterial and antioxidant activities for ultra-persistent preservation of perishable products. Food Chem 2024; 430:136993. [PMID: 37527577 DOI: 10.1016/j.foodchem.2023.136993] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 07/14/2023] [Accepted: 07/23/2023] [Indexed: 08/03/2023]
Abstract
Rapid decrease in antibacterial efficacy of existing active packages is difficult to promisingly prevent microbial infection during the storage of perishable products. Here, we pioneered an advanced ZnO-doped hollow carbon-encapsulated curcumin (ZHC-Cur)-chitosan (CS) slow-release film (ZHC-Cur-CS) with "nano-barricade" structure through demand-oriented tailoring of the structure and components of zeolitic imidazolate framework-8 (ZIF-8) carrier. Such an exquisite structure realized the effective sustained release of Curcumin through the dual complexity of diffusion pathway by the disordered hierarchical pore structure and steric hindrance. Prepared ZHC-Cur-CS film exhibited boosting bactericidal and antioxidant abilities by virtue of the functional synergy between curcumin and ZnO. Thus, ZHC-Cur-CS film demonstrated excellent preservation performance by significantly prolonging the shelf life of Citrus (∼2.4 times). Furthermore, the upgraded mechanical strength, improved barrier ability, and proven safety laid the foundation for its practical application. These satisfactory properties underscore the applicability of ZHC-Cur-CS film for the efficient preservation of perishable products.
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Affiliation(s)
- Liang Zhang
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Wenze Wang
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Wen He
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Ting Du
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Shaochi Wang
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Puyuan Hu
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Bing Pan
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Jingjing Jin
- Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China.
| | - Lizhi Liu
- Department of Anesthesiology, Division of Critical Care Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA..
| | - Jianlong Wang
- College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China.
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31
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Wang S, Zeng J, Li P, Li J, Wang B, Gao W, Xu J. High-strength hydrophilic N-halamines chitosan and cellulose nanofibers membranes with repeated bactericidal properties. Int J Biol Macromol 2023; 253:127065. [PMID: 37748591 DOI: 10.1016/j.ijbiomac.2023.127065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 09/14/2023] [Accepted: 09/22/2023] [Indexed: 09/27/2023]
Abstract
Direct addition of disinfectants and membrane separation techniques have been common methods to address microbial contamination in water. However, disinfectants may generate toxic by-products, and even minor damage or biofilm formation on filtration membranes can lead to a heightened risk of microbial contamination. Consequently, how to quickly and safely disinfect microbial contaminated water sources remains a huge challenge. In this study, the high-strength broad-spectrum antibacterial CNF/CS composite membrane was fabricated by utilizing cellulose nanofibers (CNF) to reinforce the structure of chitosan (CS). The resulting CNF/CS composite membrane exhibits an impressive tensile strength of 148 MPa and boasts an active chlorine content of 5.29 %. Notably, even after undergoing 50 washing cycles and 10 repeated chlorination procedures, the structural integrity and high active chlorine content of the composite membrane remain preserved, validating its exceptional strength, stability, and chlorine rechargeability. Additionally, the CNF/CS antibacterial materials demonstrate remarkable attributes in terms of rapid sterilization, sustained and consistent release of active chlorine, and efficient inhibition of biofilm formation, demonstrating great potential in efficient, green, and safe sterilization.
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Affiliation(s)
- Shuxiu Wang
- Plant Fiber Research Center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China
| | - Jinsong Zeng
- Plant Fiber Research Center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China.
| | - Pengfei Li
- Plant Fiber Research Center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China; School of Environment and Energy, South China University of Technology, Guangzhou 510640, China.
| | - Jinpeng Li
- Plant Fiber Research Center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China
| | - Bin Wang
- Plant Fiber Research Center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China
| | - Wenhua Gao
- Plant Fiber Research Center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China
| | - Jun Xu
- Plant Fiber Research Center, State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Guangzhou 510006, China
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32
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Wood JP. Review of techniques for the in-situ sterilization of soil contaminated with Bacillus anthracis spores or other pathogens. Res Microbiol 2023:104175. [PMID: 38141796 DOI: 10.1016/j.resmic.2023.104175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/11/2023] [Accepted: 12/15/2023] [Indexed: 12/25/2023]
Abstract
This review summarizes the literature on efficacy of techniques to sterilize soil. Soil may need to be sterilized if contaminated with pathogens such as Bacillus anthracis. Sterilizing soil in-situ minimizes spread of the bio-contaminant. Soil is difficult to sterilize, with efficacy generally diminishing with depth. Methyl bromide, formaldehyde, and glutaraldehyde are the only soil treatment options that have been demonstrated at full-scale to effectively inactivate Bacillus spores. Soil sterilization modalities with high efficacy at bench-scale include wet and dry heat, metam sodium, chlorine dioxide gas, and activated sodium persulfate. Simple oxidants such as chlorine bleach are ineffective in sterilizing soil.
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Affiliation(s)
- Joseph P Wood
- United States Environmental Protection Agency, Office of Research and Development, Homeland Security Research Program, 109 T.W. Alexander Dr., P.O. Box 12055, Research Triangle Park, NC, USA.
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Hiep NT, Nguyen MK, Nhut HT, Hung NTQ, Manh NC, Lin C, Chang SW, Um MJ, Nguyen DD. A review on sterilization methods of environmental decontamination to prevent the coronavirus SARS-CoV-2 (COVID-19 virus): A new challenge towards eco-friendly solutions. Sci Total Environ 2023; 904:166021. [PMID: 37543323 DOI: 10.1016/j.scitotenv.2023.166021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 06/13/2023] [Accepted: 08/01/2023] [Indexed: 08/07/2023]
Abstract
In recent years, the COVID-19 pandemic is currently wreaking havoc on the planet. SARS-CoV-2, the Severe Acute Respiratory Syndrome Coronavirus, is the current term for this outbreak. Reports about this novel coronavirus have been presented since the pandemic's breakout, and they have demonstrated that it transmits rapidly from person to person, primarily by droplets in the air. Findings have illustrated that SARS-CoV-2 can survive on surfaces from hours to days. Therefore, it is essential to find practical solutions to reduce the virus's impact on human health and the environment. This work evaluated common sterilization methods that can decontaminate the environment and items. The goal is that healthcare facilities, disease prevention organizations, and local communities can overcome the new challenge of finding eco-friendly solutions. Further, a foundation of information encompassing various sterilization procedures and highlighting their limits to choose the most appropriate method to stop disease-causing viruses in the new context has been presented. The findings of this crucial investigation contribute to gaining insight into the comprehensive sterilization approaches against the coronavirus for human health protection and sustainable environmental development.
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Affiliation(s)
- Nguyen Trung Hiep
- Research Institute for Sustainable Development, Ho Chi Minh University of Natural Resources and Environment, 236B Le Van Sy, Ward 1, Tan Binh District, Ho Chi Minh City 700000, Viet Nam
| | - Minh-Ky Nguyen
- Faculty of Environment and Natural Resources, Nong Lam University, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Viet Nam; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan
| | - Huynh Tan Nhut
- Faculty of Environment and Natural Resources, Nong Lam University, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Viet Nam
| | - Nguyen Tri Quang Hung
- Faculty of Environment and Natural Resources, Nong Lam University, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Viet Nam.
| | - Nguyen Cong Manh
- Department of Aquatic and Atmospheric Environment Research, Research Institute of Biotechnology and Environment, Nong Lam University, Ho Chi Minh City 700000, Viet Nam
| | - Chitsan Lin
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan
| | - S Woong Chang
- Department of Civil & Energy System Engineering, Kyonggi University, Suwon 16227, South Korea
| | - Myoung Jin Um
- Department of Civil & Energy System Engineering, Kyonggi University, Suwon 16227, South Korea
| | - D Duc Nguyen
- Department of Civil & Energy System Engineering, Kyonggi University, Suwon 16227, South Korea; Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City 755414, Viet Nam.
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34
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Baron T. Why-UD? Assessing the requirement to trial an intrauterine device as a condition for elective sterilisation in female patients. J Med Ethics 2023:jme-2023-109264. [PMID: 38124158 DOI: 10.1136/jme-2023-109264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 11/16/2023] [Indexed: 12/23/2023]
Abstract
Some National Health Service healthcare boards in the UK will approve a request for female sterilisation only if the patient first accepts a trial period of 1 year with an intrauterine device (IUD), a form of long-acting reversible contraception. In this article, I argue that this requirement is not justified by appeal to any of (or any combination of) promotion of informed consent, paternalistic concerns regarding patient regret in later life and health service budgetary considerations. Informed consent and patient autonomy may be promoted by a mandatory waiting period, but the concomitant imposition of an IUD trial during this period cannot be justified on these grounds. As long as elective vasectomy is offered by the healthcare system, elective female sterilisation should be accessible under reasonably similar-even if not identical-conditions.
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Affiliation(s)
- Teresa Baron
- Philosophy, University of Nottingham, Nottingham, UK
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35
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Xu Y, Liu J, You G, Yang Z, Miao L, Wu J, Yang G, Hou J. A quaternary ammonium salt grafted tannin-based flocculant boosts the conjugative transfer of plasmid-born antibiotic resistance genes: The nonnegligible side of their flocculation- sterilization properties. Sci Total Environ 2023; 901:166515. [PMID: 37619725 DOI: 10.1016/j.scitotenv.2023.166515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/07/2023] [Accepted: 08/21/2023] [Indexed: 08/26/2023]
Abstract
This study developed dual-function tannin-based flocculants, namely tannin-graft-acrylamide-diallyl dimethyl ammonium chloride (TGCC-A/TGCC-C), endowed with enhanced flocculation-sterilization properties. The impacts of these flocculants on proliferation and transformation of antibiotic resistance genes (ARGs) among bacteria during the flocculation-deposition process were examined. TGCC-A/TGCC-C exhibited remarkable flocculation capacities towards both Escherichia coli and Staphylococcus aureus, encompassing a logarithmic range of initial cell density (108-109 CFU/mL) and a broad pH spectrum (pH 2-11). The grafted quaternary ammonium salt groups played pivotal parts in flocculation through charge neutralization and bridging mechanisms, concurrently contributing to sterilization by disrupting cellular membranes. The correlation between flocculation and sterilization entails a sequential progression, where an excess of TGCC, initially employed for flocculation, is subsequently consumed for sterilization purposes. The frequencies of ARGs conjugative transfer were enhanced in bacterial flocs across all TGCC treatments, stemming from augmented bacterial aggregation and cell membrane permeability, elicited stress response, and up-regulated genes encoding plasmid transfer. These findings underscore the indispensable role of flocculation-sterilization effects in mediating the propagation of ARGs, consequently providing substantial support for the scientific evaluation of the environmental risks associated with flocculants in the context of ARGs dissemination during the treatment of raw water featuring high bacterial density.
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Affiliation(s)
- Yi Xu
- College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, People's Republic of China
| | - Jialin Liu
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Guoxiang You
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China.
| | - Zijun Yang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Lingzhan Miao
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Jun Wu
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China
| | - Guang Yang
- Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, People's Republic of China
| | - Jun Hou
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China
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Ghosh S, Dave V, Sharma P, Patel A, Kuila A. Protective face mask: an effective weapon against SARS-CoV-2 with controlled environmental pollution. Environ Sci Pollut Res Int 2023:10.1007/s11356-023-30460-5. [PMID: 37968481 DOI: 10.1007/s11356-023-30460-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 10/10/2023] [Indexed: 11/17/2023]
Abstract
Masks are face coverings that give protection from infectious agents, airborne pathogens, bacteria, viruses, surgical fog, dust, and other chemical hazards by acting as a barrier between the wearer and the environment. In the COVID-19 pandemic, this major personal protective equipment's became essential part of our daily life. The aim of this review is to analyze and discuss the different types of masks with their pros and cons, manufacturing procedures, evaluation criteria, and application with some of the sterilization process for reuse and smart mask. The review used a thorough examination of the literature to analyze the preventive effects of surgical, N95, smart mask, and potential environmental damage from those masks. Several studies and evidence were also examined to understand the efficiency of different mask on different environment. N95 respirators are capable of filtering out non-oil-based 95% air-born particles, and surgical masks act as a protective barrier between the wearer and the environment. The application of spoon bond and melt blown techniques in the fabrication process of those masks improves their protective nature and makes them lightweight and comfortable. But the high demand and low supply forced users to reuse and extend their use after sterilizations, even though those masks are recommended to be used once. Universal masking in the SARS-COV-2 pandemic increased the chance of environmental pollution, so the application of smart masks became essential because of their high protection power and self-sterilizing and reusing capabilities.
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Affiliation(s)
- Shovan Ghosh
- Department of Pharmacy, School of Health Science, Central University of South Bihar, Bihar, India
| | - Vivek Dave
- Department of Pharmacy, School of Health Science, Central University of South Bihar, Bihar, India.
| | - Prashansa Sharma
- Department of Home Science, Mahila Maha Vidyalaya, Banaras Hindu University, Varanasi, India
| | - Akash Patel
- Department of Pharmacy, School of Health Science, Central University of South Bihar, Bihar, India
| | - Arindam Kuila
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Sikar, Rajasthan, 304022, India
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Luan D, Li S, Wang Y, Wang Y. Studying the non-thermal effects of microwave on amino acids in sterilized rainbow trout (Oncorhynchus mykiss) fillets using a double side approximating method. Food Res Int 2023; 173:113352. [PMID: 37803699 DOI: 10.1016/j.foodres.2023.113352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/31/2023] [Accepted: 08/03/2023] [Indexed: 10/08/2023]
Abstract
The aim of this study was to investigate the impact of microwave non-thermal effects on thermal sensitive amino acids in rainbow trout (Oncorhynchus mykiss) fillets. To distinguish non-thermal effects from thermal effects occurring simultaneously, a Double Side Approximating Method (DSAM) derived from computational mathematics was developed. Two corresponding water bath treatments were designed for each microwave processing to approximate the time-temperature profiles at the hot and cold spots of the microwave processed samples while maintaining a comparable thermal intensity (F0). The microwave non-thermal effects on amino acids were determined by comparing the amount of each of 22 amino acids between the microwave processed and the two corresponding water bath treated rainbow trout fillets. The results indicated that the DSAM was successfully implemented, as the amino acid contents' order curve in the microwave processed samples was clearly exceeded the boundary formed by the two corresponding water bath treated samples. This finding confirmed the occurrence of microwave non-thermal effects on amino acids. The non-thermal effect resulted in a notable increase in the quantity of most amino acids, while it reduced the content of Lys and Hyp. Longer microwave processing times intensified these effects, while higher thermal processing intensities resulted in more damage to each amino acid.
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Affiliation(s)
- Donglei Luan
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Egineering Research Center of Food Thermal-processing Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Shu Li
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Egineering Research Center of Food Thermal-processing Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Yajing Wang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; Egineering Research Center of Food Thermal-processing Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Yifen Wang
- China Biosystems Engineering Department, Auburn University, Auburn, AL 36849, USA.
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Guo L, Zhao P, Jia Y, Wang Z, Chen M, Zhang H, Liu D, Zhang Y, Wang X, Rong M. Inactivation of airborne pathogenic microorganisms by plasma-activated nebulized mist. J Hazard Mater 2023; 459:132072. [PMID: 37480605 DOI: 10.1016/j.jhazmat.2023.132072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/21/2023] [Accepted: 07/14/2023] [Indexed: 07/24/2023]
Abstract
The airborne microorganisms in the aerosols are one main transmission way of pathogenic microorganisms and therefore inactivation of microorganisms in aerosols could effectively prevent the transmission of pathogenic microorganisms to control epidemics. The mist nebulized by plasma-activated air could effectively inactivate bacteria and could be developed for the sterilization of microorganisms in aerosols. In this study, the plasma-activated nebulized mist (PANM) was applied for the inactivation of microorganisms in aerosols and efficiently inactivated the bacteria, yeast, and viruses in aerosols after 2-min treatment. The PANM treatment caused morphologic changes and damage to the bacteria cells in aerosols. The PANM could also inactivate the microorganisms attached to the surface of the treatment chamber and the bacteria attached to the skin of mice within 6-min treatment. The biosafety assays demonstrated that the PANM treatment exhibited no effects on the behavior, hematological and serum biochemical parameters of blood, and organs from the mice. This study would supply an efficient, broad-spectrum, and safe aerosol sterilization strategy based on plasma technology to prevent the transmission of airborne microorganisms.
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Affiliation(s)
- Li Guo
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Pengyu Zhao
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Yikang Jia
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Zifeng Wang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Min Chen
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Hao Zhang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Dingxin Liu
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China.
| | - Yong Zhang
- State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Xiaohua Wang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Mingzhe Rong
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
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Whelan J. Current issues in reprocessing of medical and surgical instruments. Am J Infect Control 2023; 51:1185-1188. [PMID: 37044263 DOI: 10.1016/j.ajic.2023.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 04/04/2023] [Indexed: 04/14/2023]
Abstract
By the very nature of reusability, processing for reusable medical devices has been and continues to be risk prone. Healthcare systems have historically been slow to embed best practice quality control elements into everyday reprocessing workflow. The identification of weak points and an openness to change are necessary to allow for a proactive culture of safety. Infection preventionists can play key roles in establishing and maintaining related quality control and oversight.
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Affiliation(s)
- John Whelan
- Clinical Education Specialist, Healthmark Industries Company, Inc., Fraser, MI.
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Kunambi HJ, Ngowo H, Ali A, Urio N, Ngonzi AJ, Mwalugelo YA, Jumanne M, Mmbaga A, Tarimo FS, Swilla J, Okumu F, Lwetoijera D. Sterilized Anopheles funestus can autodisseminate sufficient pyriproxyfen to the breeding habitat under semi-field settings. Malar J 2023; 22:280. [PMID: 37735680 PMCID: PMC10515043 DOI: 10.1186/s12936-023-04699-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 09/01/2023] [Indexed: 09/23/2023] Open
Abstract
BACKGROUND Anopheles funestus, the main malaria vector, prefer to oviposit in permanent and/or semi-permanent breeding habitats located far from human dwellings. Difficulties in identifying and accessing these habitats jeopardize the feasibility of conventional larviciding. In this way, a semi-field study was conducted to assess the potential of autodissemination of pyriproxyfen (PPF) by An. funestus for its control. METHODS The study was conducted inside a semi-field system (SFS). Therein, two identical separate chambers, the treatment chamber with a PPF-treated clay pot (0.25 g AI), and the control chamber with an untreated clay pot. In both chambers, one artificial breeding habitat made of a plastic basin with one litre of water was provided. Three hundred blood-fed female An. funestus aged 5-9 days were held inside untreated and treated clay pots for 30 min and 48 h before being released for oviposition. The impact of PPF on adult emergence, fecundity, and fertility through autodissemination and sterilization effects were assessed by comparing the treatment with its appropriate control group. RESULTS Mean (95% CI) percentage of adult emergence was 15.5% (14.9-16.1%) and 70.3% (69-71%) in the PPF and control chamber for females exposed for 30 min (p < 0.001); and 19% (12-28%) and 95% (88-98%) in the PPF and control chamber for females exposed for 48 h (p < 0.001) respectively. Eggs laid by exposed mosquitoes and their hatch rate were significantly reduced compared to unexposed mosquitoes (p < 0.001). Approximately, 90% of females exposed for 48 h retained abnormal ovarian follicles and only 42% in females exposed for 30 min. CONCLUSION The study demonstrated sterilization and adult emergence inhibition via autodissemination of PPF by An. funestus. Also, it offers proof that sterilized An. funestus can transfer PPF to prevent adult emergence at breeding habitats. These findings warrant further assessment of the autodissemination of PPF in controlling wild population of An. funestus, and highlights its potential for complementing long-lasting insecticidal nets.
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Affiliation(s)
- Hamisi J Kunambi
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania.
- School of Life Science and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania.
- Tanzania Biotech Products Limited, The National Development Cooperation, P.O. Box 30119, Kibaha, Tanzania.
| | - Halfan Ngowo
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania
| | - Ali Ali
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania
| | - Naomi Urio
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania
| | - Amos J Ngonzi
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania
| | - Yohana A Mwalugelo
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania
- Department of Biomedical Sciences, Jaramogi Oginga Odinga University of Science and Technology, P.O. Box 210-40601, Bondo, Kenya
| | - Mohamed Jumanne
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania
| | - Augustino Mmbaga
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania
- School of Life Science and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania
| | - Felista S Tarimo
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania
- School of Life Science and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania
| | - Joseph Swilla
- School of Life Science and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania
| | - Fredros Okumu
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania
- School of Life Science and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania
- School of Public of Health, Faculty of Health Science, University of Witwatersrand, Johannesburg, South Africa
- Institute of Biodiversity, Animal Health and, Comparative Medicine, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Dickson Lwetoijera
- Environmental Health and Ecological Science Department, Ifakara Health Institute, P.O. Box 53, Ifakara, Tanzania.
- School of Life Science and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania.
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Chinthanom P, Dokladda K, Vichai V, Choeyklin R, Thongpanchang C, Isaka M. Chemical analysis and antitubercular activity evaluation of the dried mycelial powders of the basidiomycete Ganoderma australe TBRC-BCC 22314. Fitoterapia 2023; 169:105597. [PMID: 37380134 DOI: 10.1016/j.fitote.2023.105597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/21/2023] [Accepted: 06/23/2023] [Indexed: 06/30/2023]
Abstract
The isolation of lanostane triterpenoids possessing significant anti-tuberculosis (anti-TB) activity from mycelial cultures of the basidiomycete Ganoderma australe strain TBRC-BCC 22314 was previously reported. To demonstrate the potential of the dried mycelial powder for utilization in anti-TB medicinal products, its authentic chemical analysis was performed. Considering the possibility of the changes in the lanostane compositions and anti-TB activity by sterilization, both autoclave treated and non-autoclaved mycelial powder materials were chemically investigated. The study led to the identification of the lanostanes responsible for the activity of the mycelial extract against Mycobacterium tuberculosis H37Ra. The anti-TB activity of the extracts from autoclaved and non-autoclaved mycelial powders were the same (MIC 3.13 μg/mL). However, the analytical results revealed several unique chemical conversions of the lanostanes under the sterilization conditions. The most potent major lanostane, ganodermic acid S (1), was shown to be significantly active also against the extensively drug-resistant (XDR) strains of M. tuberculosis.
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Affiliation(s)
- Panida Chinthanom
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Klong Luang, Pathumthani 12120, Thailand
| | - Kanchana Dokladda
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Klong Luang, Pathumthani 12120, Thailand
| | - Vanicha Vichai
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Klong Luang, Pathumthani 12120, Thailand
| | - Rattaket Choeyklin
- National Biobank of Thailand (NBT), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Klong Luang, Pathumthani 12120, Thailand
| | - Chawanee Thongpanchang
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Klong Luang, Pathumthani 12120, Thailand
| | - Masahiko Isaka
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Klong Luang, Pathumthani 12120, Thailand.
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Potart D, Gluais M, Gaubert A, Da Silva N, Hourques M, Sarrazin M, Izotte J, Mora Charrot L, L'Heureux N. The cell-assembled extracellular matrix: A focus on the storage stability and terminal sterilization of this human "bio" material. Acta Biomater 2023; 166:133-146. [PMID: 37149079 PMCID: PMC7614989 DOI: 10.1016/j.actbio.2023.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 04/18/2023] [Accepted: 05/02/2023] [Indexed: 05/08/2023]
Abstract
The Cell-Assembled extracellular Matrix (CAM) is an attractive biomaterial because it provided the backbone of vascular grafts that were successfully implanted in patients, and because it can now be assembled in "human textiles". For future clinical development, it is important to consider key manufacturing questions. In this study, the impact of various storage conditions and sterilization methods were evaluated. After 1 year of dry frozen storage, no change in mechanical nor physicochemical properties were detected. However, storage at 4 °C and room temperature resulted in some mechanical changes, especially for dry CAM, but physicochemical changes were minor. Sterilization modified CAM mechanical and physicochemical properties marginally except for hydrated gamma treatment. All sterilized CAM supported cell proliferation. CAM ribbons were implanted subcutaneously in immunodeficient rats to assess the impact of sterilization on the innate immune response. Sterilization accelerated strength loss but no significant difference could be shown at 10 months. Very mild and transient inflammatory responses were observed. Supercritical CO2 sterilization had the least effect. In conclusion, the CAM is a promising biomaterial since it is unaffected by long-term storage in conditions available in hospitals (hydrated at 4 °C), and can be sterilized terminally (scCO2) without compromising in vitro nor in vivo performance. STATEMENT OF SIGNIFICANCE: In the field of tissue engineering, the use of extracellular matrix (ECM) proteins as a scaffolding biomaterial has become very popular. Recently, many investigators have focused on ECM produced by cells in vitro to produce unprocessed biological scaffolds. As this new kind of "biomaterial" becomes more and more relevant, it is critical to consider key manufacturing questions to facilitate future transition to the clinic. This article presents an extensive evaluation of long-term storage stability and terminal sterilization effects on an extracellular matrix assembled by cells in vitro. We believe that this article will be of great interest to help tissue engineers involved in so-called scaffold-free approaches to better prepare the translation from benchtop to bedside.
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Affiliation(s)
- Diane Potart
- BIOTIS - Laboratory for the Bioengineering of Tissues (UMR Inserm 1026), University of Bordeaux, Inserm, BIOTIS, UMR1026, Campus Carreire, 146 Rue Léo-Saignat, case 45, Bordeaux F-33076, France
| | - Maude Gluais
- BIOTIS - Laboratory for the Bioengineering of Tissues (UMR Inserm 1026), University of Bordeaux, Inserm, BIOTIS, UMR1026, Campus Carreire, 146 Rue Léo-Saignat, case 45, Bordeaux F-33076, France
| | - Alexandra Gaubert
- University of Bordeaux, CNRS, UMR 5320, Inserm, UMR121, ANRA, Bordeaux F-33076, France
| | - Nicolas Da Silva
- BIOTIS - Laboratory for the Bioengineering of Tissues (UMR Inserm 1026), University of Bordeaux, Inserm, BIOTIS, UMR1026, Campus Carreire, 146 Rue Léo-Saignat, case 45, Bordeaux F-33076, France
| | - Marie Hourques
- BIOTIS - Laboratory for the Bioengineering of Tissues (UMR Inserm 1026), University of Bordeaux, Inserm, BIOTIS, UMR1026, Campus Carreire, 146 Rue Léo-Saignat, case 45, Bordeaux F-33076, France
| | - Marie Sarrazin
- BIOTIS - Laboratory for the Bioengineering of Tissues (UMR Inserm 1026), University of Bordeaux, Inserm, BIOTIS, UMR1026, Campus Carreire, 146 Rue Léo-Saignat, case 45, Bordeaux F-33076, France
| | - Julien Izotte
- Animal Facility A2, University of Bordeaux, Bordeaux F-33076, France
| | - Léa Mora Charrot
- Animal Facility A2, University of Bordeaux, Bordeaux F-33076, France
| | - Nicolas L'Heureux
- BIOTIS - Laboratory for the Bioengineering of Tissues (UMR Inserm 1026), University of Bordeaux, Inserm, BIOTIS, UMR1026, Campus Carreire, 146 Rue Léo-Saignat, case 45, Bordeaux F-33076, France.
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Dagne H, S VP, Palanivel H, Yeshitila A, Benor S, Abera S, Abdi A. Advanced modeling and optimizing for surface sterilization process of grape vine ( Vitis vinifera) root stock 3309C through response surface, artificial neural network, and genetic algorithm techniques. Heliyon 2023; 9:e18628. [PMID: 37554794 PMCID: PMC10404695 DOI: 10.1016/j.heliyon.2023.e18628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 07/16/2023] [Accepted: 07/24/2023] [Indexed: 08/10/2023] Open
Abstract
In vitro, sterilization is one of the key components for proceeding with plant tissue cultures. Since the effectiveness of sterilization has a direct impact on the culture's final outcomes, there is a crucial need for optimization of the sterilization process. However, compared with traditional optimizing methods, the use of computational approaches through artificial intelligence-based process modeling and optimization algorithms provides a precise optimal condition for in vitro culturing. This study aimed to optimise in vitro sterilization of grape rootstock 3309C using RSM, ANN, and genetic algorithm (GA) techniques. In this context, two output responses, namely, Clean Culture and Explant Viability, were optimised using the models developed by RSM and ANN, followed by a GA, to obtain a globally optimal solution. The most influential independent factors, such as HgCl2, NaOCl, AgNO3, and immersion time, were considered input variables. The significance of the developed models was investigated with statistical and non-statistical techniques and was optimised to determine the significance of selected inputs. The optimal clean culture of 91%, and the explant viability of 89% can be obtained from 1.62% NaOCl at a 13.96 min immersion time, according to MLP-NSGAII. Sensitivity analysis revealed that the clean culture and explant viability were less sensitive to AgNO3 and more sensitive to immersion time. Results showed that the differences between the GA predicted and validation data were significant after the performance validation of predicted and optimised sterilising agents with immersion time combinations were tested. In general, GA, a potent methodology, may open the door to the development of new computational methods in plant tissue culture.
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Affiliation(s)
- Habtamu Dagne
- Department of Biotechnology, Centre of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - Venkatesa Prabhu S
- Department of Chemical Engineering, Centre of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - Hemalatha Palanivel
- Department of Biotechnology, Centre of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - Alazar Yeshitila
- Department of Biotechnology, Centre of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - Solomon Benor
- Department of Plant Biology and Biodiversity Management, College of Natural and Computational Sciences, Addis Ababa University, Ethiopia
| | - Solomon Abera
- Department of Biotechnology, Centre of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
| | - Adugna Abdi
- Department of Biotechnology, Centre of Excellence for Biotechnology and Bioprocess, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, PO Box 16417, Addis Ababa, Ethiopia
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覃 思, 王 闰, 李 虎, 范 铠, 王 港, 张 镱. [Study on the sterilization effect of plasma jet and plasma activated water on Streptococcus mutans]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2023; 40:559-565. [PMID: 37380397 PMCID: PMC10307596 DOI: 10.7507/1001-5515.202212030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 05/01/2023] [Indexed: 06/30/2023]
Abstract
To explore the effects of plasma jet (PJ) and plasma activated water (PAW) on the sterilization of Streptococcus mutans ( S. mutans) and compare the advantages and disadvantages of the two methods, so as to provide a basis for plasma treatment of dental caries and to enrich the treatment means of dental caries, an atmospheric pressure plasma excitation system was built, and the effects of PJ and PAW on the sterilization rate of S. mutans and the changes of temperature and pH during treatment were studied under different excitation voltage ( U e ) and different excitation time ( t e ). The results showed that in the PJ treatment, the difference in the survival rate of S. mutans between the treatment group and the control group was statistically significant ( P = 0.007, d=2.66) when U e = 7 kV and t e = 60 s, and complete sterilization was achieved at U e = 8 kV and t e = 120 s in the PJ treatment. In contrast, in the PAW treatment, the difference in the survival rate of S. mutans between the treatment group and the control group was statistically significant ( P = 0.029, d = 1.71) when U e = 7 kV and t e = 30 s, and complete sterilization was achieved with PAW treatment when U e = 9 kV and t e = 60 s. Results of the monitoring of temperature and pH showed that the maximum temperature rise during PJ and PAW treatment did not exceed 4.3 °C, while the pH value after PAW treatment would drop to a minimum of 3.02. In summary, the optimal sterilization parameters for PJ were U e =8 kV and 90 s < t e ≤ 120 s, while the optimal sterilization parameters for PAW were U e = 9 kV and 30 s< t e ≤ 60 s. Both treatment methods achieved non-thermal sterilization of S. mutans, where PJ required only a smaller U e to achieve complete sterilization, while at pH < 4.7, PAW only required a shorter t e to achieve complete sterilization, but its acidic environment could cause some chemical damage to the teeth. This study can provide some reference value for plasma treatment of dental caries.
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Affiliation(s)
- 思 覃
- 广西大学 电气工程学院(南宁 530004)School of Electrical Engineering, Guangxi University, Nanning 530004, P. R. China
| | - 闰宁 王
- 广西大学 电气工程学院(南宁 530004)School of Electrical Engineering, Guangxi University, Nanning 530004, P. R. China
| | - 虎 李
- 广西大学 电气工程学院(南宁 530004)School of Electrical Engineering, Guangxi University, Nanning 530004, P. R. China
| | - 铠源 范
- 广西大学 电气工程学院(南宁 530004)School of Electrical Engineering, Guangxi University, Nanning 530004, P. R. China
| | - 港 王
- 广西大学 电气工程学院(南宁 530004)School of Electrical Engineering, Guangxi University, Nanning 530004, P. R. China
| | - 镱议 张
- 广西大学 电气工程学院(南宁 530004)School of Electrical Engineering, Guangxi University, Nanning 530004, P. R. China
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Shawn S, Harshman SW, Davidson C, Lee JH, Jung A, Parker A, Hawkins MA, Stamps B, Pitsch R, Martin J. Sterilization and reuse of masks for a standardized exhaled breath collection device by autoclaving. J Breath Res 2023. [PMID: 37352843 DOI: 10.1088/1752-7163/ace127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2023]
Abstract
Exhaled breath research has been hindered by a lack of standardization in collection and analysis methodologies. Recently, the Respiration Collector for In Vitro Analysis (ReCIVA) sampling device has illustrated the potential to provide a consistent and convenient method for exhaled breath collection onto adsorbent media. However, the significant costs, compared to exhaled breath bags, associated with the standardized collector is believed to be the reason for limited widespread use by researchers in the exhaled breath field. For example, in addition to the sampling hardware, a single-use disposable silicon mask affixed with a filter is required for each exhaled breath collection. To reduce the financial burden, streamline device upkeep, reduce waste material, and ease the logistical burden associated with the single use masks, it is hypothesized that the consumable masks and filters could be sterilized by autoclaving for reuse. The masks were contaminated, autoclaved, and then tested for any surviving pathogens with spore strip standards and by measuring the optical density of cultures. The compound background collected when using the ReCIVA with new masks was compared to that collected with repeatedly autoclaved masks via thermal desorption gas chromatography mass spectrometry (TD-GC-MS). The capacity to block particulate matter of new filters was tested against that of autoclaved filters by introducing an aerosol and comparing pre-filter and post-filter particle counts. Finally, breath samplings were conducted with new masks and autoclaved masks to test for changes in measurements by TD-GC-MS of exogenous and endogenous compounds. The data illustrate the autoclave cycle sterilizes masks spiked with saliva to background levels (p=0.2527). The results indicate that background levels of siloxane compounds are increased as masks are repetitively autoclaved. The data show that mask filters have significant breakthrough of 1μm particles after five repetitive autoclaving cycles compared to new filters (p=0.0219). Finally, exhaled breath results utilizing a peppermint ingestion protocol indicate two compounds associated with peppermint, menthone and 1-Methyl-4-(1-methylethyl)-cyclohexanol, and an endogenous exhaled breath compound, isoprene, show no significant difference if sampled with a new mask or a mask autoclaved five times (p>0.1063). Collectively, the data indicate that ReCIVA masks and filters can be sterilized via autoclave and reused. The results suggest ReCIVA mask and filter reuse should be limited to three times to limit potentially problematic background contaminants and filter dysfunction.
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Affiliation(s)
- Samuel Shawn
- Air Force Research Laboratory, 2510 Fifth Street, Wright-Patterson AFB, Ohio, 45433-7131, UNITED STATES
| | - Sean William Harshman
- Air Force Research Laboratory, 2510 Fifth Street, Wright-Patterson AFB, Ohio, 45433-7131, UNITED STATES
| | - Christina Davidson
- Air Force Research Laboratory 711th Human Performance Wing, 2510 Fifth Street, Wright-Patterson AFB, Ohio, 45433, UNITED STATES
| | - Jae Hwan Lee
- Air Force Research Laboratory, 2510 Fifth Street, Wright-Patterson AFB, Ohio, 45433-7131, UNITED STATES
| | - Anne Jung
- UES Inc, 2510 Fifth Street, Area B, Building 840, WPAFB, Ohio, 45433, UNITED STATES
| | - Ariel Parker
- UES Inc, 4401 Dayton Xenia Rd, Dayton, Ohio, 45432-1894, UNITED STATES
| | | | - Blake Stamps
- Air Force Research Laboratory, 2510 Fifth Street, Wright-Patterson AFB, Ohio, 45433-7131, UNITED STATES
| | - Rhonda Pitsch
- Air Force Research Laboratory, 2510 Fifth Street, Area B, Building 840, Wright-Patterson AFB, Ohio, 45433-7131, UNITED STATES
| | - Jennifer Martin
- Air Force Research Laboratory, 2510 Fifth Street, Wright-Patterson AFB, Ohio, 45433-7131, UNITED STATES
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Naghilou A, Peter K, Millesi F, Stadlmayr S, Wolf S, Rad A, Semmler L, Supper P, Ploszczanski L, Liu J, Burghammer M, Riekel C, Bismarck A, Backus EHG, Lichtenegger H, Radtke C. Insights into the material properties of dragline spider silk affecting Schwann cell migration. Int J Biol Macromol 2023:125398. [PMID: 37330085 DOI: 10.1016/j.ijbiomac.2023.125398] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 06/09/2023] [Accepted: 06/13/2023] [Indexed: 06/19/2023]
Abstract
Dragline silk of Trichonephila spiders has attracted attention in various applications. One of the most fascinating uses of dragline silk is in nerve regeneration as a luminal filling for nerve guidance conduits. In fact, conduits filled with spider silk can measure up to autologous nerve transplantation, but the reasons behind the success of silk fibers are not yet understood. In this study dragline fibers of Trichonephila edulis were sterilized with ethanol, UV radiation, and autoclaving and the resulting material properties were characterized with regard to the silk's suitability for nerve regeneration. Rat Schwann cells (rSCs) were seeded on these silks in vitro and their migration and proliferation were investigated as an indication for the fiber's ability to support the growth of nerves. It was found that rSCs migrate faster on ethanol treated fibers. To elucidate the reasons behind this behavior, the fiber's morphology, surface chemistry, secondary protein structure, crystallinity, and mechanical properties were studied. The results demonstrate that the synergy of dragline silk's stiffness and its composition has a crucial effect on the migration of rSCs. These findings pave the way towards understanding the response of SCs to silk fibers as well as the targeted production of synthetic alternatives for regenerative medicine applications.
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Affiliation(s)
- Aida Naghilou
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria.
| | - Karolina Peter
- University of Natural Resources and Life Sciences, Department of Material Sciences and Process Engineering, Institute of Physics and Materials Science, Peter-Jordan-Strasse 82, 1190 Vienna, Austria
| | - Flavia Millesi
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Sarah Stadlmayr
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Sonja Wolf
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Anda Rad
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Lorenz Semmler
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Paul Supper
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Leon Ploszczanski
- University of Natural Resources and Life Sciences, Department of Material Sciences and Process Engineering, Institute of Physics and Materials Science, Peter-Jordan-Strasse 82, 1190 Vienna, Austria
| | - Jiliang Liu
- European Synchrotron Radiation Facility, 71 avenue des Martyrs, 38000 Grenoble, France
| | - Manfred Burghammer
- European Synchrotron Radiation Facility, 71 avenue des Martyrs, 38000 Grenoble, France
| | - Christian Riekel
- European Synchrotron Radiation Facility, 71 avenue des Martyrs, 38000 Grenoble, France
| | - Alexander Bismarck
- University of Vienna, Faculty of Chemistry, Institute of Materials Chemistry & Research, Währingerstraße 42, 1090 Vienna, Austria
| | - Ellen H G Backus
- University of Vienna, Faculty of Chemistry, Institute of Physical Chemistry, Währingerstraße 42, 1090 Vienna, Austria
| | - Helga Lichtenegger
- University of Natural Resources and Life Sciences, Department of Material Sciences and Process Engineering, Institute of Physics and Materials Science, Peter-Jordan-Strasse 82, 1190 Vienna, Austria
| | - Christine Radtke
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Spitalgasse 23, 1090 Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
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Li P, Ke X, Leng D, Lin X, Yang W, Zhang H, Tian C, Xu H, Chen Q. High-Intensity Ultraviolet-C Irradiation Efficiently Inactivates SARS-CoV-2 Under Typical Cold Chain Temperature. Food Environ Virol 2023; 15:123-130. [PMID: 36890342 PMCID: PMC9994784 DOI: 10.1007/s12560-023-09552-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 02/27/2023] [Indexed: 06/13/2023]
Abstract
SARS-CoV-2 contaminated items in the cold chain becomes a threat to public health, therefore the effective and safe sterilization method fit for the low temperature is needed. Ultraviolet is an effective sterilization method while its effect on SARS-CoV-2 under low-temperature environment is unclear. In this research, the sterilization effect of high-intensity ultraviolet-C (HIUVC) irradiation against SARS-CoV-2 and Staphylococcus aureus on different carriers at 4 °C and - 20 °C was investigated. The results showed that dose of 15.3 mJ/cm2 achieved more than 3 log reduction of SARS-CoV-2 on gauze at 4 °C and - 20 °C. The vulnerability of coronavirus to HIUVC under - 20 °C was not significantly different than those under 4 °C. Four models including Weibull, biphasic, log-linear tail and log linear were used to fit the survival curves of SARS-CoV-2 and Staphylococcus aureus. The biphasic model fitted best with R2 ranging from 0.9325 to 0.9878. Moreover, the HIUVC sterilization correlation between SARS-CoV-2 and Staphylococcus aureus was established. This paper provides data support for the employment of HIUVC under low-temperature environment. Also, it provides a method of using Staphylococcus aureus as a marker to evaluate the sterilization effect of cold chain sterilization equipment.
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Affiliation(s)
- Peiru Li
- Key Laboratory of Science and Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xianliang Ke
- CAS Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, Hubei, China
| | - Dongmei Leng
- Key Laboratory of Science and Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xian Lin
- CAS Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, Hubei, China
| | - Wenling Yang
- CAS Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, Hubei, China
| | - Hainan Zhang
- Key Laboratory of Science and Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Changqing Tian
- Key Laboratory of Science and Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hongbo Xu
- Key Laboratory of Science and Technology on Space Energy Conversion, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Quanjiao Chen
- CAS Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, Hubei, China.
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Liu M, Guan L, Wen Y, Su L, Hu Z, Peng Z, Li S, Tang Q, Zhou Z, Zhou N. Rice husk biochar mediated red phosphorus for photocatalysis and photothermal removal of E. coli. Food Chem 2023; 410:135455. [PMID: 36641916 DOI: 10.1016/j.foodchem.2023.135455] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 11/06/2022] [Accepted: 01/08/2023] [Indexed: 01/12/2023]
Abstract
The current photocatalytic bactericidal materials in the field of food pathogen control are usually consisted of metals that always suffering from poor stability and possible secondary pollution. Besides, the requirement for high energy excitation also inspires the enthusiasm on exploring non-metallic catalysts. Herein, the non-metallic composite of rice shell biochar loaded with red phosphorus (B@RP) was developed for photocatalysis and photothermal removal of bacteria. The B@RP showed effective photocatalysis performance to stimulate the generation of OH and O2- free radicals for the elimination of Escherichia coli (E. coli). At the same time, the photothermal effect of B@RP can also increase the permeability of cell membrane, which is conducive to free radicals entering the cell interior. Therefore, the non-metallic composite could achieve complete removal of E. coli within 2 h under illumination. Meanwhile, B@RP had excellent stability and the sterilization efficiency maintained 100% after 9 cycles. Hence, B@RP is expected to be a harmless and efficient bactericidal material for food industry.
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Affiliation(s)
- Meng Liu
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha 410128, China; College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Liqian Guan
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha 410128, China; College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Yujiao Wen
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha 410128, China; College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Lezhu Su
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha 410128, China; College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Zhan Hu
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha 410128, China; College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Zhengjie Peng
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha 410128, China; College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Shikai Li
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha 410128, China; College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Qiyuan Tang
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Zhi Zhou
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha 410128, China; College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Nan Zhou
- Hunan Engineering Research Center for Biochar, Hunan Agricultural University, Changsha 410128, China; College of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China.
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49
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Shih S, Askinas C, Caughey S, Vernice N, Berri N, Dong X, Spector JA. Sourcing and development of tissue for transplantation in reconstructive surgery: A narrative review. J Plast Reconstr Aesthet Surg 2023; 83:266-275. [PMID: 37279636 DOI: 10.1016/j.bjps.2023.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/28/2023] [Accepted: 05/02/2023] [Indexed: 06/08/2023]
Abstract
The wealth of allogeneic and xenogeneic tissue products available to plastic and reconstructive surgeons has allowed for the development of novel surgical solutions to challenging clinical problems, often obviating the need to inflict donor site morbidity. Allogeneic tissue used for reconstructive surgery enters the tissue industry through whole body donation or reproductive tissue donation and has been regulated by the FDA as human cells, tissues, and cellular and tissue-based products (HCT/Ps) since 1997. Tissue banks offering allogeneic tissue can also undergo voluntary regulation by the American Association of Tissue Banks (AATB). Tissue prepared for transplantation is sterilized and can be processed into soft tissue or bone allografts for use in surgical reconstruction, whereas non-transplant tissue is prepared for clinical training and drug, medical device, and translational research. Xenogeneic tissue, which is most often derived from porcine or bovine sources, is also commercially available and is subject to strict regulations for animal breeding and screening for infectious diseases. Although xenogeneic products have historically been decellularized for use as non-immunogenic tissue products, recent advances in gene editing have opened the door to xenograft organ transplants into human patients. Herein, we describe an overview of the modern sourcing, regulation, processing, and applications of tissue products relevant to the field of plastic and reconstructive surgery.
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Affiliation(s)
- Sabrina Shih
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Weill Cornell Medical Center/New York-Presbyterian Hospital, New York, NY, United States of America
| | - Carly Askinas
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Weill Cornell Medical Center/New York-Presbyterian Hospital, New York, NY, United States of America
| | - Sarah Caughey
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Weill Cornell Medical Center/New York-Presbyterian Hospital, New York, NY, United States of America
| | - Nicholas Vernice
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Weill Cornell Medical Center/New York-Presbyterian Hospital, New York, NY, United States of America
| | - Nabih Berri
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Weill Cornell Medical Center/New York-Presbyterian Hospital, New York, NY, United States of America
| | - Xue Dong
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Weill Cornell Medical Center/New York-Presbyterian Hospital, New York, NY, United States of America
| | - Jason A Spector
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Weill Cornell Medical Center/New York-Presbyterian Hospital, New York, NY, United States of America.
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50
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Valls-Esteve A, Lustig-Gainza P, Adell-Gomez N, Tejo-Otero A, Englí-Rueda M, Julian-Alvarez E, Navarro-Sureda O, Fenollosa-Artés F, Rubio-Palau J, Krauel L, Munuera J. A state-of-the-art guide about the effects of sterilization processes on 3D-printed materials for surgical planning and medical applications: A comparative study. Int J Bioprint 2023; 9:756. [PMID: 37555083 PMCID: PMC10406103 DOI: 10.18063/ijb.756] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 03/01/2023] [Indexed: 08/10/2023] Open
Abstract
Surgeons use different medical devices in the surgery, such as patient-specific anatomical models, cutting and positioning guides, or implants. These devices must be sterilized before being used in the operation room. There are many sterilization processes available, with autoclave, hydrogen peroxide, and ethylene oxide being the most common in hospital settings. Each method has both advantages and disadvantages in terms of mechanics, chemical interaction, and post-treatment accuracy. The aim of the present study is to evaluate the dimensional and mechanical effect of the most commonly used sterilization techniques available in clinical settings, i.e., Autoclave 121, Autoclave 134, and hydrogen peroxide (HPO), on 11 of the most used 3D-printed materials fabricated using additive manufacturing technologies. The results showed that the temperature (depending on the sterilization method) and the exposure time to that temperature influence not only the mechanical behavior but also the original dimensioning planned on the 3D model. Therefore, HPO is a better overall option for most of the materials evaluated. Finally, based on the results of the study, a recommendation guide on sterilization methods per material, technology, and clinical application is presented.
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Affiliation(s)
- Arnau Valls-Esteve
- Innovation Department, Hospital Sant Joan de Déu,
Esplugues de Llobregat, Spain
- Medicina i Recerca Translacional, Facultat de Medicina i
Ciències de la Salut, Universitat de Barcelona, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
| | | | - Nuria Adell-Gomez
- Innovation Department, Hospital Sant Joan de Déu,
Esplugues de Llobregat, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
| | - Aitor Tejo-Otero
- Centre CIM, Universitat Politècnica de Catalunya
(CIM UPC), Barcelona, Spain
| | - Marti Englí-Rueda
- Innovation Department, Hospital Sant Joan de Déu,
Esplugues de Llobregat, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
| | | | - Osmeli Navarro-Sureda
- Sterilization Department, Hospital Sant Joan de Déu,
Universitat de Barcelona, Spain
| | - Felip Fenollosa-Artés
- Centre CIM, Universitat Politècnica de Catalunya
(CIM UPC), Barcelona, Spain
- Department of Mechanical Engineering, School of Engineering
of Barcelona (ETSEIB), Universitat Politècnica de Catalunya, Barcelona,
Spain
| | - Josep Rubio-Palau
- Medicina i Recerca Translacional, Facultat de Medicina i
Ciències de la Salut, Universitat de Barcelona, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
- Department of Pediatric Surgery, Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
- Maxillofacial Unit, Department of Pediatric Surgery,
Hospital Sant Joan de Déu, Universitat de Barcelona, Spain
| | - Lucas Krauel
- Medicina i Recerca Translacional, Facultat de Medicina i
Ciències de la Salut, Universitat de Barcelona, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
- Department of Pediatric Surgery, Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
| | - Josep Munuera
- Medicina i Recerca Translacional, Facultat de Medicina i
Ciències de la Salut, Universitat de Barcelona, Spain
- 3D for Health Unit (3D4H), Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
- Department of Diagnostic Imaging, Hospital Sant Joan de
Déu, Universitat de Barcelona, Spain
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