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Dolci G, Puricelli S, Cecere G, Tua C, Fava F, Rigamonti L, Grosso M. How does plastic compare with alternative materials in the packaging sector? A systematic review of LCA studies. Waste Manag Res 2024:734242X241241606. [PMID: 38576323 DOI: 10.1177/0734242x241241606] [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] [Indexed: 04/06/2024]
Abstract
In the recent years, packaging made of conventional plastics has been increasingly replaced by materials believed to be more sustainable. However, perceived sustainability must align with scientific assessments, such as life cycle assessments (LCAs). This review analysed 53 peer-reviewed studies published in the time range 2019-2023, aiming at understanding the state of the art in LCA about the environmental impacts of packaging by focusing on the comparison between plastics and alternative materials. The literature showed that consumer perceptions often differ from LCA findings and revealed that, frequently, conventional plastics are not the least environmentally friendly choice. Bioplastics typically show benefits only in the climate change and the fossil resource depletion impact categories. The heavy weight of glass turns out to affect its environmental performances with respect to the light plastics, with reuse being an essential strategy to lower the burdens. The comparison between plastics and metals is more balanced, leaning more towards plastics for food packaging. Similarly, article resulted often preferable than plastics. Finally, for the other materials (i.e. wood and textiles), the picture is variable. To be competitive with plastics, the alternative materials require improvements like the optimisation of their production processes, their reuse and enhanced end-of-life options. At the same time, recycled polymers could boost the eco-performance of virgin plastics.
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Affiliation(s)
- Giovanni Dolci
- Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, Italy
| | - Stefano Puricelli
- Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, Italy
| | - Giuseppe Cecere
- Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, Italy
| | - Camilla Tua
- Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, Italy
| | - Floriana Fava
- Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, Italy
| | - Lucia Rigamonti
- Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, Italy
| | - Mario Grosso
- Department of Civil and Environmental Engineering, Politecnico di Milano, Milano, Italy
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2
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Fenton MA, Fennell HL, Kaiser MJ. Characteristics of papers that affect citations in the Journal of Fish Biology. J Fish Biol 2024; 104:310-314. [PMID: 37721715 DOI: 10.1111/jfb.15565] [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: 04/18/2023] [Revised: 09/10/2023] [Accepted: 09/13/2023] [Indexed: 09/19/2023]
Abstract
Identifying the factors that influence the citation of articles helps authors improve the impact and reach of their research. Analysis of publications in the Journal of Fish Biology between 2008 and 2021 revealed that variables such as the number of keywords, abstract length, number of authors, and page length were associated with higher impact papers. These trends applied to both review and regular papers. These findings suggest that papers that are more informative, have higher numbers of authors, and have more keywords are more likely to be cited. Adoption of some simple "best-practice" behaviors can improve the likelihood that a paper is cited.
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Affiliation(s)
- M A Fenton
- The Lyell Centre, Heriot-Watt University, Edinburgh, Scotland
| | - H L Fennell
- The Lyell Centre, Heriot-Watt University, Edinburgh, Scotland
| | - M J Kaiser
- The Lyell Centre, Heriot-Watt University, Edinburgh, Scotland
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3
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AlJasser MI. Black printed paper as a simple method to assess laser beam profile. J Am Acad Dermatol 2023; 89:e261-e263. [PMID: 34801634 DOI: 10.1016/j.jaad.2021.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 10/29/2021] [Accepted: 11/15/2021] [Indexed: 10/19/2022]
Affiliation(s)
- Mohammed I AlJasser
- Division of Dermatology, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia; King Abdullah International Medical Research Center, Riyadh, Saudi Arabia.
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4
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Zhang J, Cui P, Wang J, Meng H, Ge Y, Feng C, Liu H, Meng Y, Zhou Z, Xuan N, Zhang B, Cheng G, Du Z. Paper-Based Hydroelectric Generators for Water Evaporation-Induced Electricity Generation. Adv Sci (Weinh) 2023; 10:e2304482. [PMID: 37740700 PMCID: PMC10625126 DOI: 10.1002/advs.202304482] [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] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/05/2023] [Indexed: 09/25/2023]
Abstract
The research presented in this paper introduces a novel environmental energy-harvesting technology that harnesses electricity from the evaporation of water using porous structural materials. Specifically, a strategy employing paper-based hydroelectric generators (p-HEGs) is proposed to capture the energy produced during water evaporation and convert it into usable electricity. The p-HEGs offer several advantages, including simplicity in fabrication, low cost, and reusability. To evaluate their effectiveness, the water evaporation-induced electrical output performance of four different p-HEGs are compared. Among the variants tested, the p-HEG combining wood pulp and polyester fiber exhibits the best output performance. At room temperature, this particular p-HEG generates a short-circuit current and open-circuit voltage of ≈0.4 µA and 0.3 V, respectively, thereby demonstrating excellent electrical stability. Furthermore, the electrical current and voltage generated by the p-HEG through water evaporation are able to power an LED light, both individually and in series and parallel connections. This study delves into the potential of electricity harvesting from water evaporation and establishes it as a viable method for renewable energy applications.
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Affiliation(s)
- Jingjing Zhang
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Peng Cui
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Jingjing Wang
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Huan Meng
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Ying Ge
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Can Feng
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Huimin Liu
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Yao Meng
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Zunkang Zhou
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Ningning Xuan
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Bao Zhang
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Gang Cheng
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
| | - Zuliang Du
- School of Materials Science and EngineeringKey Lab for Special Functional Materials of Ministry of EducationNational & Local Joint Engineering Research Center for High‐efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475004China
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5
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Vilhena L, Afonso L, Ramalho A. Skin Friction: Mechanical and Tribological Characterization of Different Papers Used in Everyday Life. Materials (Basel) 2023; 16:5724. [PMID: 37630015 PMCID: PMC10456811 DOI: 10.3390/ma16165724] [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: 12/27/2022] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 08/27/2023]
Abstract
The coefficient of friction for different contacting materials against skin is mainly influenced by the nature of the materials (synthetic and natural fabrics), mechanical contact parameters (interfacial pressure and sliding velocities), and physiological skin conditions (ambient humidity and skin moisture content). In the present research work, seven different types of papers used in everyday life were analyzed. The physical properties of these materials were determined through tensile tests and friction tests. By comparing mechanical properties with coefficient of friction, it was possible to conclude that the coefficient of friction is strongly correlated with the mechanical properties.
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Affiliation(s)
- Luís Vilhena
- Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), Department of Mechanical Engineering, University of Coimbra, 3030-788 Coimbra, Portugal
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Bayés G, Aguado RJ, Tarrés Q, Planella J, Delgado-Aguilar M. Stabilization of Beeswax-In-Water Dispersions Using Anionic Cellulose Nanofibers and Their Application in Paper Coating. Nanomaterials (Basel) 2023; 13:2353. [PMID: 37630938 PMCID: PMC10459156 DOI: 10.3390/nano13162353] [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] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/08/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023]
Abstract
Beeswax is a bio-sourced, renewable, and even edible material that stands as a convincing option to provide paper-based food packaging with moisture resistance. Nonetheless, the difficulty of dispersing it in water limits its applicability. This work uses oxidized, negatively charged cellulose nanofibers along with glycerol to stabilize beeswax-in-water emulsions above the melting point of the wax. The synergistic effects of nanocellulose and glycerol granted the stability of the dispersion even when it cooled down, but only if the concentration of nanofibers was high enough. This required concentration (0.6-0.9 wt%) depended on the degree of oxidation of the cellulose nanofibers. Rheological hindrance was essential to prevent the buoyancy of beeswax particles, while the presence of glycerol prevented excessive aggregation. The mixtures had yield stress and showed pseudoplastic behavior at a high enough shear rate, with their apparent viscosity being positively influenced by the surface charge density of the nanofibers. When applied to packaging paper, the nanocellulose-stabilized beeswax suspensions not only enhanced its barrier properties towards liquid water (reaching a contact angle of 96°) and water vapor (<100 g m-2 d-1), but also to grease (Kit rating: 5) and airflow (>1400 Gurley s). While falling short of polyethylene-coated paper, this overall improvement, attained using only one layer of a biobased coating suspension, should be understood as a step towards replacing synthetic waxes and plastic laminates.
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Affiliation(s)
- Genís Bayés
- LEPAMAP-PRODIS Research Group, University of Girona, Maria Aurèlia Capmany, 61, 17003 Girona, Spain; (G.B.); (Q.T.); (M.D.-A.)
- Noel Alimentària SAU, Pla de Begudà, 17857 Begudà, Spain;
| | - Roberto J. Aguado
- LEPAMAP-PRODIS Research Group, University of Girona, Maria Aurèlia Capmany, 61, 17003 Girona, Spain; (G.B.); (Q.T.); (M.D.-A.)
| | - Quim Tarrés
- LEPAMAP-PRODIS Research Group, University of Girona, Maria Aurèlia Capmany, 61, 17003 Girona, Spain; (G.B.); (Q.T.); (M.D.-A.)
| | - Jaume Planella
- Noel Alimentària SAU, Pla de Begudà, 17857 Begudà, Spain;
| | - Marc Delgado-Aguilar
- LEPAMAP-PRODIS Research Group, University of Girona, Maria Aurèlia Capmany, 61, 17003 Girona, Spain; (G.B.); (Q.T.); (M.D.-A.)
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7
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Xiong C, Wang T, Zhang Y, Duan C, Zhang Z, Zhou Q, Xiong Q, Zhao M, Wang B, Ni Y. Multifunctional Conductive Material Based on Intelligent Porous Paper Used in Conjunction with a Vitrimer for Electromagnetic Shielding, Sensing, Joule Heating, and Antibacterial Properties. ACS Appl Mater Interfaces 2023. [PMID: 37424075 DOI: 10.1021/acsami.3c06926] [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] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
With the continuous improvement of living standards and advancements in science and technology, composite materials with multiple functionalities are gaining high practical value in modern society. In this paper, we present a multifunctional conductive paper-based composite with electromagnetic (EMI) shielding, sensing, Joule heating, and antimicrobial properties. The composite is prepared by growing metallic silver nanoparticles inside the cellulose paper (CP) modified with polydopamine (PDA). The resulting CP@PDA@Ag (CPPA) composite has high conductivity and EMI shielding properties. Furthermore, CPPA composites demonstrate exceptional sensing, Joule heating, and antimicrobial properties. In addition, Vitrimer, a polymer with excellent cross-linked network structure, is introduced into CPPA composites to obtain CPPA-V intelligent electromagnetic shielding materials with shape memory function. These excellent properties show that the prepared multifunctional intelligent composite has exceptional EMI shielding, sensing, Joule heating, and antibacterial and shape memory properties. In short, this multifunctional intelligent composite material has great application prospects in flexible wearable electronics.
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Affiliation(s)
- Chuanyin Xiong
- College of Bioresources Chemical & Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Tianxu Wang
- College of Bioresources Chemical & Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Yongkang Zhang
- College of Bioresources Chemical & Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Chao Duan
- College of Bioresources Chemical & Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Zhao Zhang
- College of Bioresources Chemical & Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Qiusheng Zhou
- College of Bioresources Chemical & Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Qing Xiong
- College of Bioresources Chemical & Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Mengjie Zhao
- College of Bioresources Chemical & Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Bo Wang
- College of Bioresources Chemical & Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Yonghao Ni
- Department of Chemical and Biomedical Engineering, The University of Maine, Orono, Maine 04469, United States
- University of New Brunswick, Limerick Pulp & Paper Ctr, Fredericton, New Brunswick E3B 5A3, Canada
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8
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Hernández-García E, Pacheco-Romeralo M, Zomeño P, Viscusi G, Malvano F, Gorrasi G, Torres-Giner S. Development and Characterization of Thermoformed Bilayer Trays of Paper and Renewable Succinic Acid Derived Biopolyester Blends and Their Application to Preserve Fresh Pasta. Materials (Basel) 2023; 16:ma16103872. [PMID: 37241499 DOI: 10.3390/ma16103872] [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] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/09/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023]
Abstract
The present study reports on the development by thermoforming of highly sustainable trays based on a bilayer structure composed of paper substrate and a film made of a blend of partially bio-based poly(butylene succinate) (PBS) and poly(butylene succinate-co-adipate) (PBSA). The incorporation of the renewable succinic acid derived biopolyester blend film slightly improved the thermal resistance and tensile strength of paper, whereas its flexural ductility and puncture resistance were notably enhanced. Furthermore, in terms of barrier properties, the incorporation of this biopolymer blend film reduced the water and aroma vapor permeances of paper by two orders of magnitude, while it endowed the paper structure with intermediate oxygen barrier properties. The resultant thermoformed bilayer trays were, thereafter, originally applied to preserve non-thermally treated Italian artisanal fresh pasta, "fusilli calabresi" type, which was stored under refrigeration conditions for 3 weeks. Shelf-life evaluation showed that the application of the PBS-PBSA film on the paper substrate delayed color changes and mold growth for 1 week, as well as reduced drying of fresh pasta, resulting in acceptable physicochemical quality parameters within 9 days of storage. Lastly, overall migration studies performed with two food simulants demonstrated that the newly developed paper/PBS-PBSA trays are safe since these successfully comply with current legislation on plastic materials and articles intended to come into contact with food.
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Affiliation(s)
- Eva Hernández-García
- Research Institute of Food Engineering for Development (IIAD), Universitat Politècnica de València (UPV), Camino de Vera s/n, 46022 Valencia, Spain
| | - Marta Pacheco-Romeralo
- Research Institute of Food Engineering for Development (IIAD), Universitat Politècnica de València (UPV), Camino de Vera s/n, 46022 Valencia, Spain
| | - Pedro Zomeño
- Packaging Technologies Department, AINIA, Calle Benjamín Franklin 5-11, 46980 Paterna, Spain
| | - Gianluca Viscusi
- Department of Industrial Engineering (DIIn), University of Salerno (UNISA), Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Francesca Malvano
- Department of Industrial Engineering (DIIn), University of Salerno (UNISA), Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Giuliana Gorrasi
- Department of Industrial Engineering (DIIn), University of Salerno (UNISA), Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Sergio Torres-Giner
- Research Institute of Food Engineering for Development (IIAD), Universitat Politècnica de València (UPV), Camino de Vera s/n, 46022 Valencia, Spain
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Vrabič-Brodnjak U. Bio-Based Adhesives Formulated from Tannic Acid, Chitosan, and Shellac for Packaging Materials. Polymers (Basel) 2023; 15:polym15051302. [PMID: 36904541 PMCID: PMC10007413 DOI: 10.3390/polym15051302] [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: 01/30/2023] [Revised: 02/24/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
The aim of this study was to develop bio-based adhesives that can be used for various packaging papers. In addition to commercial paper samples, papers produced from harmful plant species in Europe, such as Japanese Knotweed and Canadian Goldenrod, were used. In this research, methods were developed to produce bio-based adhesive solutions in combinations of tannic acid, chitosan, and shellac. The results showed that the viscosity and adhesive strength of the adhesives were best in solutions with added tannic acid and shellac. The tensile strength with adhesives of tannic acid and chitosan was 30% better than with commercial adhesives and 23% for combinations of shellac and chitosan. For paper from Japanese Knotweed and Canadian Goldenrod, the most durable adhesive was pure shellac. Because the surface morphology of the invasive plant papers was more open and had numerous pores compared to the commercial papers, the adhesives penetrated the paper structure and filled the voids. There was less adhesive on the surface and the commercial papers achieved better adhesive properties. As expected, the bio-based adhesives also showed an increase in peel strength and exhibited favorable thermal stability. In summary, these physical properties support the use of bio-based adhesives use in different packaging applications.
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Affiliation(s)
- Urška Vrabič-Brodnjak
- Department of Textiles, Graphic Arts and Design, Faculty of Natural Sciences and Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia
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Worku LA, Bachheti A, Bachheti RK, Rodrigues Reis CE, Chandel AK. Agricultural Residues as Raw Materials for Pulp and Paper Production: Overview and Applications on Membrane Fabrication. Membranes (Basel) 2023; 13:228. [PMID: 36837731 PMCID: PMC9959550 DOI: 10.3390/membranes13020228] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
The need for pulp and paper has risen significantly due to exponential population growth, industrialization, and urbanization. Most paper manufacturing industries use wood fibers to meet pulp and paper requirements. The shortage of fibrous wood resources and increased deforestation are linked to the excessive dependence on wood for pulp and paper production. Therefore, non-wood substitutes, including corn stalks, sugarcane bagasse, wheat, and rice straw, cotton stalks, and others, may greatly alleviate the shortage of raw materials used to make pulp and paper. Non-woody raw materials can be pulped easily using soda/soda-AQ (anthraquinone), organosolv, and bio-pulping. The use of agricultural residues can also play a pivotal role in the development of polymeric membranes separating different molecular weight cut-off molecules from a variety of feedstocks in industries. These membranes range in applications from water purification to medicinal uses. Considering that some farmers still burn agricultural residues on the fields, resulting in significant air pollution and health issues, the use of agricultural residues in paper manufacturing can eventually help these producers to get better financial outcomes from the grown crop. This paper reviews the current trends in the technological pitch of pulp and paper production from agricultural residues using different pulping methods, with an insight into the application of membranes developed from lignocellulosic materials.
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Affiliation(s)
- Limenew Abate Worku
- Centre of Excellence in Nanotechnology, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
| | - Archana Bachheti
- Department of Environment Science, Graphic Era University, Dehradun 248002, India
| | - Rakesh Kumar Bachheti
- Centre of Excellence in Nanotechnology, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
- Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa P.O. Box 16417, Ethiopia
| | | | - Anuj Kumar Chandel
- Department of Biotechnology, Engineering School of Lorena (EEL), Estrada Municipal do Campinho, University of São Paulo (USP), Lorena 12602-810, São Paulo, Brazil
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11
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Sežun M, Karlovits I, Kavčič U. Chemical and enzymatic deinking efficiency of agricultural and industrial waste fiber-based paper packaging. J Sci Food Agric 2023; 103:1069-1076. [PMID: 35152422 DOI: 10.1002/jsfa.11815] [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: 11/19/2021] [Revised: 01/18/2022] [Accepted: 02/13/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Deinking is an important part of paper recycling that involves the removal of ink particles from the paper fibres. This industrial process is important so that the fibres can be recirculated back into paper production, which enables better sustainability as fewer fresh fibres are needed. In this study, we examined five different alternative fibre materials from different agricultural residues and industrial processes for the pilot production of papers. Papers containing fibres from invasive plants (Japanese knotweed), dedicated crops (miscanthus, acacia), agricultural residues (tomato stems), and industrial waste (jute - fibres from coffee bags) were printed with water-based flexo inks and deinked with two separate processes (chemical and enzymes). Mechanical (break and tensile index, breaking length) and optical properties (ISO whiteness, brightness and CIE L*a*b* values) were measured and ink elimination IR700 and deinking efficiency was calculated for the two deinking processes. RESULTS Enzymatic treatment improved the mechanical properties of deinked pulp in comparison with the classic chemical treatment. Mechanical strength for almost all papers increased slightly (breaking length up to 20% in tomato and jute), and the optical result (brightness) increased similarly for both processes due to the bleaching action of the colour-shaded samples, whereas the deinking efficiency showed mixed results between chemical- and enzyme-type deinking (with chemical achieving better elimination measured at 700 nm) in the typical range of ink elimination values (15-35%) for flexographic inks. This indicates further optimization of the deinking with enzymes is needed due to different alternative fibre compositions and variations of residues in the delignification processes. CONCLUSION Using a combination of adjusted enzymatic treatment as a precursor for deinking of paper-based packaging materials sourced from alternative fibres showed promising results regarding mechanical properties, whereas the optical properties need to be improved with cellulase optimization or by using mixes of different enzymes. These kinds of paper materials printed with flexo inks were found to be successfully deinkable with the chemical ISO-based deinking protocol. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Mija Sežun
- Pulp and Paper Institute, Ljubljana, Slovenia
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12
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Khomutinnikov NV, Govyazin IO, Ivanov GE, Fedorova EM, Makarov IS, Vinogradov MI, Kulichikhin VG. Experimental Study on the Manufacturing of Functional Paper with Modified by N-Methylmorpholine-N-oxide Surfaces. Polymers (Basel) 2023; 15:692. [PMID: 36771993 DOI: 10.3390/polym15030692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/18/2023] [Accepted: 01/27/2023] [Indexed: 02/03/2023] Open
Abstract
The manufacturing of paper with new functional properties is a current problem today. A method of modifying the surface layer of paper by the partial dissolution of cellulose on its surface is proposed. N-Methylmorpholine-N-oxide (NMMO) is proposed for use as a solvent, the regeneration of which provides an environmentally friendly process. It was shown that among the possible hydrate forms of the solvent, the monohydrate and higher-melting forms are optimal for modifying the paper surface. The temperature-time modes of processing were revealed and the weight gain and density increase in the course of modification were estimated. The structural and morphological features of the original and modified paper were studied by X-ray imaging and scanning microscopy. The NMMO surface treatment makes it possible to vary the air permeability of the paper, making it practically non-permeable. The capillary and pore system were radically transformed after the partial dissolution of cellulose and its coagulation, as the formed cellulose film isolates them, which leads to a decrease in surface absorbency. The processing conditions allowing for the optimization of the optical and strength properties of the modified paper samples are revealed. The resulting paper with a modified N-methylmorpholine-N-oxide surface layer can be used for printing valuable documents.
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Kaneko M, Kim JY, Ishida M, Kawai M, Mitsumata T. Development of a Method for Peeling Off Paper from Celluloid Pictures for Animation Films. Polymers (Basel) 2023; 15. [PMID: 36771991 DOI: 10.3390/polym15030690] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/25/2023] [Accepted: 01/27/2023] [Indexed: 01/31/2023] Open
Abstract
During the storage of celluloid pictures for animation films over half a century, an interleave paper adhered to acrylic paint. The purpose of this study is to establish a methodology to cleanly remove the paper from the paint. A layered film, a replica of the celluloid pictures, adhered with paper was prepared and immersed in water or ethanol. The effect of these solvents on the peeling behavior was investigated using a peel test. The maximum peel force for the dry layered film in was distributed at ~0.5 N, independently of the peel speed. The peel force was significantly reduced after the layered film was immersed in pure water or ethanol. A morphological observation revealed that the dry paper was peeled off via the cohesive failure of the paper. After the layered film was immersed in pure water, the paper was also peeled off via cohesive failure. The layered film immersed in ethanol was peeled off at the paper/paint interface. To clear the effect of the volume change in the paint on peel behavior, the relative volume was determined via image analysis. The relative volume of paint was 1.56 in pure water and 1.37 in ethanol. It can be considered that the large difference in the volume of paint induces a large shear stress at the paint/paper interface.
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14
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Moriwaki H, Kamine T. "Plasma-Structural Coloring" of Penciling on a Paper. ACS Appl Mater Interfaces 2023; 15:4781-4788. [PMID: 36631746 DOI: 10.1021/acsami.2c19642] [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] [Indexed: 06/17/2023]
Abstract
The penciling part on a paper is colored by the formation of structural color, and the coloring of a paper without ink has been achieved. In a previous study, our group reported that structural color is formed by plasma irradiation (40-120 s) of the surface of a pencil lead or paper painted with a pencil. The formation of structural color due to the thin-layer interference of components of the pencil lead was observed. The clay exposed by removal of the surface graphite through plasma etching plays the role of a "thin layer". The pencil lead can be colored blue, red, and green by the method. In the case of the paper painted with a pencil (6B), the paper turned blue but could not form the other colors by the method. The reason is that the graphite layer on the paper is not thick enough to form thin-layer interference to show colors other than blue. We now present the method that forms structural colors by plasma irradiation of the paper painted by a graphite-rich pencil lead (9B and 12B). The formation of various structural colors, such as blue, yellow, red-purple, and green, on the paper was achieved. The colored site can be effaced by an eraser. This method is a novel coloring method without using colored inks. This environmentallly friendly coloring method can be applied to various activities, such as studies and art, and can contribute to the achievement of a sustainable society.
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Affiliation(s)
- Hiroshi Moriwaki
- Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1, Tokida, Ueda 386-8567, Japan
- Research Initiative for Supra-Materials, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, 3-15-1, Tokida, Ueda 386-8567, Japan
| | - Tomoya Kamine
- Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1, Tokida, Ueda 386-8567, Japan
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15
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Abdelkader A, Nallbati L, Keck CM. Improving the Bioactivity of Norfloxacin with Tablets Made from Paper. Pharmaceutics 2023; 15:pharmaceutics15020375. [PMID: 36839695 PMCID: PMC9959448 DOI: 10.3390/pharmaceutics15020375] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 01/10/2023] [Accepted: 01/12/2023] [Indexed: 01/24/2023] Open
Abstract
(1) Background: Many drugs possess poor bioavailability, and many strategies are available to overcome this issue. In this study, smartFilm technology, i.e., a porous cellulose matrix (paper), in which the active compound can be loaded onto in an amorphous state was utilised for oral administration to improve the solubility and bioactivity of a poorly soluble BSC class IV antibiotic. (2) Methods: Norfloxacin was used as the model drug and loaded into commercially available paper. The resulting norfloxacin-loaded smartFilms were transformed into smartFilm granules via wet granulation and the resulting norfloxacin-loaded smartFilm granules were transformed into norfloxacin-loaded tablets made from paper, i.e., smartFilm tablets. The crystalline state of norfloxacin was investigated, as well as the pharmaceutical properties of the granules and the tablets. The bioactivity of the smartFilm tablets was assessed in vitro and ex vivo to determine the antibacterial activity of norfloxacin. The results were compared to a physical mixture tablet that contained non-loaded paper granules and equal amounts of norfloxacin as a crystalline powder. (3) Results: Norfloxacin-loaded smartFilm granules and norfloxacin-loaded smartFilm tablets contained norfloxacin in an amorphous state, which resulted in an improved and faster release of norfloxacin when compared to the physical mixture tablet. The bioactivity was up to three times higher when compared to the physical mixture tablet. The ex vivo model was demonstrated to be a useful tool that allows for a fast and cost-effective discrimination between "good" and "bad" formulations. It provides realistic physiological conditions and can therefore yield meaningful, additional biopharmaceutical information that cannot be assessed in classical in vitro experiments. (4) Conclusions: smartFilm tablets are a promising, universal, industrially feasible and cost-effective formulation strategy for improved solubility and enhanced bioactivity of poorly soluble drugs.
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Affiliation(s)
- Ayat Abdelkader
- Department of Pharmaceutics and Biopharmaceutics, Philipps-Universität Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
- Assiut International Center of Nanomedicine, Al-Rajhi Liver Hospital, Assiut University, Assiut 71515, Egypt
| | - Laura Nallbati
- Department of Pharmaceutics and Biopharmaceutics, Philipps-Universität Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Cornelia M. Keck
- Department of Pharmaceutics and Biopharmaceutics, Philipps-Universität Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
- Correspondence: ; Tel.:+49-6421-282-5881
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16
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Sasaki Y, Lyu X, Minami T. Printed colorimetric chemosensor array on a 96-microwell paper substrate for metal ions in river water. Front Chem 2023; 11:1134752. [PMID: 36909708 PMCID: PMC9996040 DOI: 10.3389/fchem.2023.1134752] [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: 12/30/2022] [Accepted: 02/02/2023] [Indexed: 02/25/2023] Open
Abstract
Here, we propose a printed 96-well microtiter paper-based chemosensor array device (PCSAD) to simultaneously detect metal ions for river water assessment. Colorimetric chemosensors for metal ions have been designed based on molecular self-assembly using off-the-shelf catechol dyes and a phenylboronic acid (PBA) derivative. The colorimetric self-assembled chemosensors consisting of catechol dyes and a PBA derivative on a 96-well microtiter paper substrate demonstrated various color changes according to the disassembly of the ensembles by the addition of nine types of metal ions. An in-house-made algorithm was used to automate imaging analysis and extract color intensities at seven types of color channels from a captured digital image, allowing for rapid data processing. The obtained information-rich inset data showed fingerprint-like colorimetric responses and was applied to the qualitative and quantitative pattern recognition of metal ions using chemometric techniques. The feasibility of the 96-well microtiter PCSAD for environmental assessment has been revealed by the demonstration of a spike-and-recovery test against metal ions in a river water sample.
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Affiliation(s)
- Yui Sasaki
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
| | - Xiaojun Lyu
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
| | - Tsuyoshi Minami
- Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
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17
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Pinheiro T, Correia R, Morais M, Coelho J, Fortunato E, Sales MGF, Marques AC, Martins R. Water Peel-Off Transfer of Electronically Enhanced, Paper-Based Laser-Induced Graphene for Wearable Electronics. ACS Nano 2022; 16:20633-20646. [PMID: 36383513 PMCID: PMC9798867 DOI: 10.1021/acsnano.2c07596] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 10/03/2022] [Indexed: 06/09/2023]
Abstract
Laser-induced graphene (LIG) has gained preponderance in recent years, as a very attractive material for the fabrication and patterning of graphitic structures and electrodes, for multiple applications in electronics. Typically, polymeric substrates, such as polyimide, have been used as precursor materials, but other organic, more sustainable, and accessible precursor materials have emerged as viable alternatives, including cellulose substrates. However, these substrates have lacked the conductive and chemical properties achieved by conventional LIG precursor substrates and have not been translated into fully flexible, wearable scenarios. In this work, we expand the conductive properties of paper-based LIG, by boosting the graphitization potential of paper, through the introduction of external aromatic moieties and meticulous control of laser fluence. Colored wax printing over the paper substrates introduces aromatic chemical structures, allowing for the synthesis of LIG chemical structures with sheet resistances as low as 5 Ω·sq-1, translating to an apparent conductivity as high as 28.2 S·cm-1. Regarding chemical properties, ID/IG ratios of 0.28 showcase low defect densities of LIG chemical structures and improve on previous reports on paper-based LIG, where sheet resistance has been limited to values around 30 Ω·sq-1, with more defect dense and less crystalline chemical structures. With these improved properties, a simple transfer methodology was developed, based on a water-induced peel-off process that efficiently separates patterned LIG structures from the native paper substrates to conformable, flexible substrates, harnessing the multifunctional capabilities of LIG toward multiple applications in wearable electronics. Proof-of concept electrodes for electrochemical sensors, strain sensors, and in-plane microsupercapacitors were patterned, transferred, and characterized, using paper as a high-value LIG precursor for multiples scenarios in wearable technologies, for improved sustainability and accessibility of such applications.
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Affiliation(s)
- Tomás Pinheiro
- CENIMAT|i3N,
Departamento de Ciência de Materiais, Faculdade de Ciências
e Tecnologia, Universidade Nova de Lisboa
and CEMOP/UNINOVA, Campus da Caparica, 2829-516Caparica, Portugal
- BioMark@UC,
Department of Chemical Engineering, Faculty of Science and Technology, Coimbra University, 3030-790, Coimbra, Portugal
| | - Ricardo Correia
- CENIMAT|i3N,
Departamento de Ciência de Materiais, Faculdade de Ciências
e Tecnologia, Universidade Nova de Lisboa
and CEMOP/UNINOVA, Campus da Caparica, 2829-516Caparica, Portugal
| | - Maria Morais
- CENIMAT|i3N,
Departamento de Ciência de Materiais, Faculdade de Ciências
e Tecnologia, Universidade Nova de Lisboa
and CEMOP/UNINOVA, Campus da Caparica, 2829-516Caparica, Portugal
| | - João Coelho
- CENIMAT|i3N,
Departamento de Ciência de Materiais, Faculdade de Ciências
e Tecnologia, Universidade Nova de Lisboa
and CEMOP/UNINOVA, Campus da Caparica, 2829-516Caparica, Portugal
| | - Elvira Fortunato
- CENIMAT|i3N,
Departamento de Ciência de Materiais, Faculdade de Ciências
e Tecnologia, Universidade Nova de Lisboa
and CEMOP/UNINOVA, Campus da Caparica, 2829-516Caparica, Portugal
| | - M. Goreti F. Sales
- BioMark@UC,
Department of Chemical Engineering, Faculty of Science and Technology, Coimbra University, 3030-790, Coimbra, Portugal
- CEB
− Centre of Biological Engineering, University of Minho, 4710-057, Braga, Portugal
| | - Ana C. Marques
- CENIMAT|i3N,
Departamento de Ciência de Materiais, Faculdade de Ciências
e Tecnologia, Universidade Nova de Lisboa
and CEMOP/UNINOVA, Campus da Caparica, 2829-516Caparica, Portugal
| | - Rodrigo Martins
- CENIMAT|i3N,
Departamento de Ciência de Materiais, Faculdade de Ciências
e Tecnologia, Universidade Nova de Lisboa
and CEMOP/UNINOVA, Campus da Caparica, 2829-516Caparica, Portugal
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18
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Yang L, Zhang L, Sun D. Harvesting Electricity from Atmospheric Moisture by Engineering an Organic Acid Gradient in Paper. ACS Appl Mater Interfaces 2022; 14:53615-53626. [PMID: 36437545 DOI: 10.1021/acsami.2c12777] [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] [Indexed: 06/16/2023]
Abstract
Moisture-activated electric generators (MEGs) that harvest clean energy from atmospheric humidity offer exciting opportunities for upgraded energy conversions. However, it is challenging to obtain MEGs that are both easy to fabricate and of high output power, due to the requirement for particular functional materials and the cumbersome manufacturing process. Herein, a simple and general method is adopted to prepare MEGs with chemically gradient structures. As a specific example, a gradient distribution of citric acid was successfully constructed inside an A4 printer paper by asymmetric drying, which can generate a continuous voltage of tens of millivolts by ambient humidity, and even to volts (275 mV and 7.6 μA cm-2) under asymmetric humidity stimulation, and the maximum power density output was 2.1 μW cm-2. The driving force behind this energy conversion is a self-maintained ionic gradient created within the paper by the asymmetric ionization of gradient organic acids when exposed to gradient or nongradient humid air. This work broadens the class of materials and possibilities for the rapid development of MEGs, shedding new light on the revolution of generators that harvest green and sustainable energy for power generation.
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Affiliation(s)
- Luyu Yang
- Institute of Chemicobiology and Functional Materials, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei, Nanjing210094, China
| | - Lei Zhang
- Institute of Chemicobiology and Functional Materials, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei, Nanjing210094, China
| | - Dongping Sun
- Institute of Chemicobiology and Functional Materials, School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei, Nanjing210094, China
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19
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Yan T, Zhang G, Chai H, Qu L, Zhang X. Corrigendum: Flexible biosensors based on colorimetry, fluorescence, and electrochemistry for point-of-care testing. Front Bioeng Biotechnol 2022; 10:1087738. [PMID: 36457856 PMCID: PMC9706210 DOI: 10.3389/fbioe.2022.1087738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 09/18/2023] Open
Abstract
[This corrects the article DOI: 10.3389/fbioe.2021.753692.].
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Affiliation(s)
- Tingyi Yan
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Intelligent Wearable Engineering Research Center of Qingdao, Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, Qingdao University, Qingdao, China
| | - Guangyao Zhang
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Intelligent Wearable Engineering Research Center of Qingdao, Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, Qingdao University, Qingdao, China
| | - Huining Chai
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
| | - Lijun Qu
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Intelligent Wearable Engineering Research Center of Qingdao, Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, Qingdao University, Qingdao, China
| | - Xueji Zhang
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
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20
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Pinto PIF, Magina S, Fateixa S, Pinto PCR, Liebner F, Evtuguin DV. Modification of Paper Surface by All-Lignin Coating Formulations. Materials (Basel) 2022; 15:7869. [PMID: 36431355 PMCID: PMC9695548 DOI: 10.3390/ma15227869] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/02/2022] [Accepted: 11/04/2022] [Indexed: 06/16/2023]
Abstract
All-lignin coating formulations were prepared while combining water-soluble cationic kraft lignin (quaternized LignoBoost®, CL) and anionic lignosulphonate (LS). The electrostatic attraction between positively charged CL and negatively charged LS led to the formation of insoluble self-organized macromolecule aggregates that align to films. The structures of the formed layers were evaluated by atomic force microscopy (AFM), firstly on glass lamina using dip-coating deposition and then on handsheets and industrial uncoated paper using roll-to-roll coating in a layer-by-layer mode. Coated samples were also characterized by optical microscopy, scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (SEM/EDS), and contact angle measurements. It was suggested that the structure of all-lignin aggregates is the result of the interaction of amphiphilic water-soluble lignin molecules leading to their specifically ordered mutual arrangement depending on the order and the mode of their application on the surface. The all-lignin coating of cellulosic fiber imparts lower air permeability and lower free surface energy to paper, mainly due to a decrease in surface polarity, thus promoting the paper's hydrophobic properties. Moderate loading of lignin coating formulations (5-6 g m-2) did not affect the mechanical strength of the paper.
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Affiliation(s)
- Patricia I. F. Pinto
- RAIZ—Forest and Paper Research Institute, Quinta de S. Francisco, Apartado 15, 3801-501 Eixo Aveiro, Portugal
- CICECO—Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Sandra Magina
- CICECO—Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Sara Fateixa
- CICECO—Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Paula C. R. Pinto
- RAIZ—Forest and Paper Research Institute, Quinta de S. Francisco, Apartado 15, 3801-501 Eixo Aveiro, Portugal
| | - Falk Liebner
- CICECO—Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
- Department of Chemistry, Institute of Chemistry of Renewable Resources, University of Natural Resources and Life Sciences, Vienna (BOKU), Konrad Lorenz Strasse 24, A-3430 Tulln, Austria
| | - Dmitry V. Evtuguin
- CICECO—Aveiro Institute of Materials and Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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21
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Susu L, Vulpoi A, Astilean S, Focsan M. Portable Plasmonic Paper-Based Biosensor for Simple and Rapid Indirect Detection of CEACAM5 Biomarker via Metal-Enhanced Fluorescence. Int J Mol Sci 2022; 23:11982. [PMID: 36233297 DOI: 10.3390/ijms231911982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 10/05/2022] [Accepted: 10/07/2022] [Indexed: 11/07/2022] Open
Abstract
Rapid, simple, and sensitive analysis of relevant proteins is crucial in many research areas, such as clinical diagnosis and biomarker detection. In particular, clinical data on cancer biomarkers show great promise in forming reliable predictions for early cancer diagnostics, although the current analytical systems are difficult to implement in regions of limited recourses. Paper-based biosensors, in particular, have recently received great interest because they meet the criteria for point-of-care (PoC) devices; the main drawbacks with these devices are the low sensitivity and efficiency in performing quantitative measurements. In this work, we design a low-cost paper-based nanosensor through plasmonic calligraphy by directly drawing individual plasmonic lines on filter paper using a ballpoint pen filled with gold nanorods (AuNR) as the colloidal ink. The plasmonic arrays were further successively coated with negatively and positively charged polyelectrolyte layers employed as dielectric spacers to promote the enhancement of the emission of carboxyl-functionalized quantum dots (QD)—previously conjugated with specific antibodies—for indirect detection of the carcinoembryonic antigen-related cell adhesion molecule 5 (CEACAM5). The efficiency, sensitivity, as well as the specificity of our portable nanosensor were validated by recording the luminescence of the QD@Ab complex when different concentrations of CEACAM5 were added dropwise onto the calligraphed plasmonic arrays.
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22
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Abdelkader A, Preis E, Keck CM. SmartFilm Tablets for Improved Oral Delivery of Poorly Soluble Drugs. Pharmaceutics 2022; 14:pharmaceutics14091918. [PMID: 36145666 PMCID: PMC9500710 DOI: 10.3390/pharmaceutics14091918] [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: 08/07/2022] [Revised: 08/24/2022] [Accepted: 09/06/2022] [Indexed: 11/30/2022] Open
Abstract
(1) Background: Numerous oral drugs exhibit limited bioavailability due to their poor solubility and poor intestinal permeability. The smartFilm technology is an innovative approach that improves the drug aqueous solubility via incorporating the drug in an amorphous state into a cellulose-based matrix, i.e., paper. smartFilms can be transformed into a free-flowing physical form (i.e., paper granules) that can be compressed into tablets with optimum physico-chemical and pharmaceutical properties. The aim of this study was to investigate if smartFilm tablets are suitable for improved oral delivery of poorly water-soluble drugs. (2) Methods: Curcumin is a poorly soluble drug with low intestinal permeability and was used for the production of curcumin-loaded smartFilms. The curcumin-loaded smartFilms were transferred into smartFilm granules which were then compressed into curcumin-loaded smartFilm tablets. The tablets were characterized regarding their physico-chemical and pharmaceutical properties, and the intestinal permeability of curcumin was determined with the ex vivo porcine intestinal model. The ex vivo intestinal permeability of curcumin from the smartFilm tablets was compared to a physical mixture of curcumin and paper and to a classical and to an innovative commercial product, respectively. (3) Results: The produced curcumin-loaded smartFilm tablets fulfilled the European Pharmacopoeia requirements, incorporated curcumin in amorphous state within the cellulose matrix and exhibited an enhanced dissolution rate. The ex vivo intestinal permeation data were shown to correlate to the in vitro dissolution data. The ex vivo intestinal permeation of curcumin from the smartFilm tablets was about two-fold higher when compared to the physical mixture and the classical commercial product. No differences in the ex vivo bioavailability were found between the smartFilm tablets and the innovative commercial product. (4) Conclusions: smartFilm tablets are a cost-effective and industrially feasible formulation approach for the formulation of poorly water-soluble drugs, i.e., BCS class II and IV drugs.
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Affiliation(s)
- Ayat Abdelkader
- Department of Pharmaceutics and Biopharmaceutics, Philipps-Universität Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
- Assiut International Center of Nanomedicine, Al-Rajhi Liver Hospital, Assiut University, Assiut 71515, Egypt
| | - Eduard Preis
- Department of Pharmaceutics and Biopharmaceutics, Philipps-Universität Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
| | - Cornelia M. Keck
- Department of Pharmaceutics and Biopharmaceutics, Philipps-Universität Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany
- Correspondence: ; Tel.: +49-6421-282-5881
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23
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Nguyen MP, Rivard RL, Blaschke B, Vang S, Schroder LK, Cole PA, Cunningham BP. Capturing patient-reported outcomes: paper versus electronic survey administration. OTA Int 2022; 5:e212. [PMID: 36349121 PMCID: PMC9580259 DOI: 10.1097/oi9.0000000000000212] [Citation(s) in RCA: 4] [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: 11/01/2021] [Accepted: 04/25/2022] [Indexed: 11/26/2022]
Abstract
Objective: To compare the capture rates and costs of paper patient-reported outcomes (pPRO) administered in-clinic and electronic PROs (ePRO) collected through emails and texts. Design: Retrospective review. Setting: Level 1 trauma center. Patients/Participants: The pPRO program enrolled 2164 patients for postsurgical follow-up in 4 fracture types: ankle, distal radius, proximal humerus, and implant removal from 2012 to 2017. The ePRO program enrolled 3096 patients in 13 fracture types from 2018 to 2020. Among the patients enrolled in the ePRO program, 1296 patients were matched to the 4 original fracture types and time points. Main Outcome Measures: PRO capture rates in 4 fracture types by matched time point and estimated cost of each program per enrolled patient. Results: At first follow-up, pPRO provided a higher capture rate than ePRO for 3 of 4 fracture types except for implant removal (P < 0.05). However, at 6-month and 1-year follow-ups, ePRO demonstrated statistically significant higher capture rates when compared with pPRO for all applicable modules (P < 0.05). The average cost for the pPRO program was $171 per patient versus $56 per patient in the ePRO program. Patients were 1.19 times more likely to complete ePRO compared with pPRO (P = 0.007) after controlling for age, sex, fracture type, and time point. Conclusion: The electronic PRO service has improved long-term capture rates compared with paper PROs, while minimizing cost. A combined program that includes both in-clinic and out of clinic effort may be the ideal model for collection of PROs. Level of Evidence: Level 3.
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Affiliation(s)
- Mai P. Nguyen
- Department of Orthopaedic Surgery, Regions Hospital, St. Paul, MN
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN; and
| | | | - Breanna Blaschke
- Department of Orthopaedic Surgery, Methodist Hospital, St. Louis Park, MN
| | - Sandy Vang
- Department of Orthopaedic Surgery, Regions Hospital, St. Paul, MN
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN; and
| | - Lisa K. Schroder
- Department of Orthopaedic Surgery, Regions Hospital, St. Paul, MN
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN; and
| | - Peter A. Cole
- Department of Orthopaedic Surgery, Regions Hospital, St. Paul, MN
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN; and
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24
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Ahn BK, Ahn YJ, Lee YJ, Lee YH, Lee GJ. Simple and Sensitive Detection of Bacterial Hydrogen Sulfide Production Using a Paper-Based Colorimetric Assay. Sensors (Basel) 2022; 22:5928. [PMID: 35957485 PMCID: PMC9371415 DOI: 10.3390/s22155928] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/02/2022] [Accepted: 08/05/2022] [Indexed: 06/15/2023]
Abstract
Hydrogen sulfide (H2S) is known to participate in bacteria-induced inflammatory response in periodontal diseases. Therefore, it is necessary to quantify H2S produced by oral bacteria for diagnosis and treatment of oral diseases including halitosis and periodontal disease. In this study, we introduce a paper-based colorimetric assay for detecting bacterial H2S utilizing silver/Nafion/polyvinylpyrrolidone membrane and a 96-well microplate. This H2S-sensing paper showed a good sensitivity (8.27 blue channel intensity/μM H2S, R2 = 0.9996), which was higher than that of lead acetate paper (6.05 blue channel intensity/μM H2S, R2 = 0.9959). We analyzed the difference in H2S concentration released from four kinds of oral bacteria (Eikenella corrodens, Streptococcus sobrinus, Streptococcus mutans, and Lactobacillus casei). Finally, the H2S level in Eikenella corrodens while varying the concentration of cysteine and treatment time was quantified. This paper-based colorimetric assay can be utilized as a simple and effective tool for in vitro screening of H2S-producing ability of many bacteria as well as salivary H2S analysis.
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Affiliation(s)
- Byung-Ki Ahn
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Yong-Jin Ahn
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Young-Ju Lee
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Yeon-Hee Lee
- Department of Orofacial Pain and Oral Medicine, Kyung Hee University Dental Hospital, Kyung Hee University School of Dentistry, Seoul 02447, Korea
| | - Gi-Ja Lee
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul 02447, Korea
- Department of Medical Engineering, Kyung Hee University Graduate School, Seoul 02447, Korea
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Spagnuolo L, D'Orsi R, Operamolla A. Nanocellulose for Paper and Textile Coating: The Importance of Surface Chemistry. Chempluschem 2022; 87:e202200204. [PMID: 36000154 DOI: 10.1002/cplu.202200204] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [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: 06/12/2022] [Revised: 07/29/2022] [Indexed: 11/11/2022]
Abstract
Nanocellulose has received enormous scientific interest for its abundance, easy manufacturing, biodegradability, and low cost. Cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs) are ideal candidates to replace plastic coating in the textile and paper industry. Thanks to their capacity to form an interconnected network kept together by hydrogen bonds, nanocelluloses perform an unprecedented strengthening action towards cellulose- and other fiber-based materials. Furthermore, nanocellulose use implies greener application procedures, such as deposition from water. The surface chemistry of nanocellulose plays a pivotal role in influencing the performance of the coating: tailored surface functionalization can introduce several properties, such as gas or grease barrier, hydrophobicity, antibacterial and anti-UV behavior. This review summarizes recent achievements in the use of nanocellulose for paper and textile coating, evidencing critical aspects of coating performances related to deposition technique, nanocellulose morphology, and surface functionalization. Furthermore, beyond focusing on the aspects strictly related to large-scale coating applications for paper and textile industries, this review includes recent achievements in the use of nanocellulose coating for the safeguarding of Cultural Heritage, an extremely noble and interesting emerging application of nanocellulose, focusing on consolidation of historical paper and archaeological textile. Finally, nanocellulose use in electronic devices as an electrode modifier is highlighted.
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Affiliation(s)
- Laura Spagnuolo
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Giuseppe Moruzzi, 13, 56124, Pisa, Italy.,Interuniversity Consortium of Chemical Reactivity and Catalysis (CIRCC), Via Celso Ulpiani 27, Bari, 70126, Italy
| | - Rosarita D'Orsi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Giuseppe Moruzzi, 13, 56124, Pisa, Italy.,Interuniversity Consortium of Chemical Reactivity and Catalysis (CIRCC), Via Celso Ulpiani 27, Bari, 70126, Italy
| | - Alessandra Operamolla
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Giuseppe Moruzzi, 13, 56124, Pisa, Italy.,Interuniversity Consortium of Chemical Reactivity and Catalysis (CIRCC), Via Celso Ulpiani 27, Bari, 70126, Italy
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26
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Bian Y, Ye Z, Zhao G, Tang K, Teng Y, Chen S, Zhao L, Yuan X, Zhu S, Ye J, Lu H, Yang Y, Fu L, Gu S. Enhanced Contactless Salt-Collecting Solar Desalination. ACS Appl Mater Interfaces 2022; 14:34151-34158. [PMID: 35830567 DOI: 10.1021/acsami.2c09063] [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] [Indexed: 06/15/2023]
Abstract
Solar desalination is expected to solve the problem of global water shortage. Yet its stability is plagued by salt accumulation. Here, a paper-based thermal radiation-enabled evaporation system (TREES) is demonstrated to achieve sustainable and highly efficient salt-collecting desalination, featuring a dynamic evaporation front based on the accumulated salt layer where water serves as its own absorber via energy down-conversion. When processing 7 wt % brine, it continuously evaporates water at a high rate─2.25 L m-2 h-1 under 1 sun illumination─which is well beyond the input solar energy limit for over 366 h. It is revealed that such enhanced evaporation arises from the unique vertical evaporation wall of the paper-TREES, which captures the thermal energy from the heated bottom efficiently and gains extra energy from the warmer environment. These findings provide novel insights into the design of next-generation salt-harvesting solar evaporators and take a step further to advance their applications in green desalination.
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Affiliation(s)
- Yue Bian
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
- Research School of Physics, Australian National University, Acton 2601, Australia
| | - Zhihao Ye
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Gengyou Zhao
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Kun Tang
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Yan Teng
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Si Chen
- School of the Environment, Nanjing University, Nanjing 210093, China
| | - Lijuan Zhao
- School of the Environment, Nanjing University, Nanjing 210093, China
| | - Xiu Yuan
- Computer Science and Engineering, University of California, San Diego, California 92093, United States
| | - Shunming Zhu
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Jiandong Ye
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Hai Lu
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Yi Yang
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
| | - Lan Fu
- Research School of Physics, Australian National University, Acton 2601, Australia
| | - Shulin Gu
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
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Lyu X, Sasaki Y, Ohshiro K, Tang W, Yuan Y, Minami T. Printed 384-Well Microtiter Plate on Paper for Fluorescent Chemosensor Array in Food Analysis. Chem Asian J 2022; 17:e202200479. [PMID: 35612563 DOI: 10.1002/asia.202200479] [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: 05/07/2022] [Revised: 05/24/2022] [Indexed: 11/06/2022]
Abstract
We propose a printed 384-well microtiter paper-based fluorescent chemosensor array device (384-well microtiter PCAD) to simultaneously categorize and discriminate saccharides and sulfur-containing amino acids for food analysis. The 384-well microtiter PCAD required 1 μL/4 mm 2 of each well can allow high-throughput sensing. The device embedded with self-assembled fluorescence chemosensors displayed a fingerprint-like response pattern for targets, the image of which was rapidly captured by a portable digital camera. Indeed, the paper-based chemosensor array system combined with imaging analysis and pattern recognition techniques successfully not only categorized saccharides and sulfur-containing amino acids but also classified mono- and disaccharide groups. Furthermore, the quantitative detectability of the printed device was revealed by a spike recovery test for fructose and glutathione in a diluted freshly made tomato juice. We believe that the 384-well microtiter PCAD using the imaging analysis system will be a powerful sensor for multi-analytes at several categorized groups in real samples.
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Affiliation(s)
- Xiaojun Lyu
- The University of Tokyo: Tokyo Daigaku, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
| | - Yui Sasaki
- The University of Tokyo: Tokyo Daigaku, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
| | - Kohei Ohshiro
- The University of Tokyo: Tokyo Daigaku, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
| | - Wei Tang
- The University of Tokyo: Tokyo Daigaku, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
| | - Yousi Yuan
- The University of Tokyo: Tokyo Daigaku, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
| | - Tsuyoshi Minami
- The University of Tokyo, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
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Jordan JH, Easson MW, Cheng HN, Condon BD. Application of Lignin-Containing Cellulose Nanofibers and Cottonseed Protein Isolate for Improved Performance of Paper. Polymers (Basel) 2022; 14:2154. [PMID: 35683825 DOI: 10.3390/polym14112154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/16/2022] [Accepted: 05/20/2022] [Indexed: 11/16/2022] Open
Abstract
There is current interest in replacing petroleum-based additives in consumer paper products with abundantly available, renewable and sustainable biopolymers such as lignin-containing cellulose nanofibers (LCNFs) and cottonseed protein. This research characterized the performance of cottonseed protein isolate with/without LCNFs to increase the dry strength of filter paper. The application of 10% protein solution with 2% LCNFs as an additive improved the elongation at break, tensile strength and modulus of treated paper products compared to the improved performance of cottonseed protein alone. Improvements in tensile modulus and tensile strength were greatest for samples containing larger amounts of lignin and a greater degree of polymerization than for those with less lignin from the same biomass sources.
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Lee DH, Yeo CD, Ho Kim Y. Human Acellular Dermal Allograft Patch on Traumatic Tympanic Membrane Perforation. J Int Adv Otol 2022; 18:243-251. [PMID: 35608494 PMCID: PMC10682802 DOI: 10.5152/iao.2022.21272] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 03/09/2021] [Accepted: 08/04/2021] [Indexed: 11/30/2023] Open
Abstract
BACKGROUND This study aimed to investigate the outcome of using the human acellular dermal allograft patch compared with the conven- tional paper patch in traumatic tympanic membrane perforation. METHODS This was a retrospective study including 41 patients (42 ears) treated with 22 human acellular dermal allografts and 20 paper patches for acute traumatic tympanic membrane perforation from April 2013 to June 2020. The procedure was performed by applying human acellular dermal allograft or paper patches after trimming of perforation margins under local anesthesia. Patient's age, sex, cause, duration, side, location, size of perforation, and the result of healing was analyzed. The audiologic or computed tomography data were also investigated when available. RESULTS There was no significant difference in sex, age, affected side ratio, size and duration of perforation, recovery confirmation time, and audiogram results between the two groups. There was no significant difference in the size or duration of perforation between the success and failure groups. The human acellular dermal allograft and paper-patch groups showed no significant difference in the recovery confirmation time (70.7 ± 42.3 vs. 89.9 ± 119.4 days, P = .486) and recovery rate (95.5% vs. 85.0%, P = .333). However, the patch maintenance time of the human acellular dermal allograft group was statistically longer than the paper-patch group (32.9 ± 14.9 vs. 15.6 ± 19.9 days, P = .001). On multivariable regression analysis, patch material was the only parameter associated with patch maintenance time (P = .002). CONCLUSION Treatment outcomes of traumatic tympanic membrane perforation using human acellular dermal allograft showed better or similar therapeutic efficacy compared to paper patch. The important advantage of this material is to stay in situ for a sufficient time without being detached until successful healing.
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Affiliation(s)
- Dong-Han Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University Medical Center, Seoul, Republic of Korea
| | - Cha-Dong Yeo
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, South Korea
| | - Young Ho Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, South Korea
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30
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Loesch-Zhang A, Cordt C, Geissler A, Biesalski M. A Solvent-Free Approach to Crosslinked Hydrophobic Polymeric Coatings on Paper Using Vegetable Oil. Polymers (Basel) 2022; 14:1773. [PMID: 35566941 DOI: 10.3390/polym14091773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/19/2022] [Accepted: 04/22/2022] [Indexed: 02/06/2023] Open
Abstract
Hydrophobic coatings are of utmost importance for many applications of paper-based materials. However, to date, most coating methods demand vast amounts of chemicals and solvents. Frequently, fossil-based coating materials are being used and multiple derivatization reactions are often required to obtain desired performances. In this work, we present a solvent-free paper-coating process, where olive oil as the main biogenic component is being used to obtain a hydrophobic barrier on paper. UV-induced thiol-ene photocrosslinking of olive oil was pursued in a solvent-free state at a wavelength of 254 nm without addition of photoinitiator. Optimum reaction conditions were determined in advance using oleic acid as a model compound. Paper coatings based on olive oil crosslinked by thiol-ene reaction reach water contact angles of up to 120°. By means of Fourier transform infrared spectroscopy and differential scanning calorimetry, a successful reaction and the formation of a polymer network within the coating can be proven. These results show that click-chemistry strategies can be used to achieve hydrophobic polymeric paper coatings while keeping the amount of non-biobased chemicals and reaction steps at a minimum.
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Zhao M, Luo L, Guo Y, Zhao B, Chen X, Shi X, Khan M, Lin JM, Hu Q. Viscosity-Based Flow Sensor on Paper for Quantitative and Label-Free Detection of α-Amylase and Its Inhibitor. ACS Sens 2022; 7:593-600. [PMID: 35050602 DOI: 10.1021/acssensors.1c02489] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
α-Amylase (AMS) in human serum is a critical biomarker for the early diagnosis of pancreatic damage. In addition, the inhibition of α-amylase has long been thought to decrease the occurrence of diabetes. Thus, it is critical to construct a facile and convenient method for the determination of AMS and its inhibitor. In this study, we demonstrate a novel amylase sensor based on translating the viscosity change of the aqueous solution into the difference of the water diffusion length on a pH paper strip. AMS can be quantitatively detected by measuring the viscosity change of the amylopectin solution in the presence of AMS with different concentrations. The paper-based AMS sensor has a very high sensitivity with a detection limit of 0.017 U/mL and also shows excellent specificity. In addition, the inhibitory effect of acarbose on AMS is demonstrated with the IC50 value determined to be 21.66 ± 1.13 μg/mL. Furthermore, it is also evaluated for the detection of AMS in human serum samples of healthy people and acute pancreatitis patients. The difference in amylase levels between the two groups is unambiguously distinguished. Overall, this study provides a very simple, cost-effective, equipment-free, high-throughput, and label-free method for rapid and quantitative detection of α-amylase and may have significant applications in the diagnosis of acute pancreatitis and the screening of AMS inhibitors.
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Affiliation(s)
- Mei Zhao
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Limei Luo
- Maternal and Child Health Development Research Center, Shandong Provincial Maternal and Child Health Care Hospital, Jinan 250014, China
| | - Yongxian Guo
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Binglu Zhao
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Xiangfeng Chen
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Xingang Shi
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Mashooq Khan
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Jin-Ming Lin
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Qiongzheng Hu
- School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
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32
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Pigorsch E, Kiessler B, Hüls M. New method for the absolute dating of paper by radiocarbon measurements. J Forensic Sci 2022; 67:1505-1512. [PMID: 35195289 DOI: 10.1111/1556-4029.15018] [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: 10/28/2021] [Revised: 01/14/2022] [Accepted: 02/10/2022] [Indexed: 11/30/2022]
Abstract
The absolute dating of documents is still one of the most important challenges for forensic document examiners (FDE). The potential difference between the date on a questioned document and the actual year of production of the used paper can be only 1 to 5 years. Until now, there was no analytical method with this accuracy available. This study demonstrates a method for an absolute dating of paper by using the 14 C bomb peak and dating the starch in the paper. Accelerator mass spectroscopy (AMS) radiocarbon measurements were performed on starch extracts and cellulose fibers from 50 paper samples with known production year from 1950 to 2018. For most of the paper samples, the measured 14 C concentration values in the starch extracts were highly correlated with the data of the 14 C bomb peak calibration curve. The differences between the calibrated ages and the actual harvest years of the starch-containing plants were only up to 3 years. The 14 C concentration in the paper fibers showed a lower but significant correlation with the production year of the papers and can be used to support the dating results of the starch extracts. In order to secure the accuracy of the dating, aside from the radiocarbon measurements of the extracted starch other analytical methods or data are used, like a detailed chemical analysis of the paper composition including fiber composition and the spectroscopic analysis of the purity of the starch extracts. In practice, only starch extracts without contaminations are used for the paper dating.
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Affiliation(s)
| | | | - Matthias Hüls
- Leibniz-Labor für Altersbestimmung und Isotopenforschung, Christian-Albrechts-Universität Kiel, Kiel, Germany
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33
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Lv C, Guo X, Hou Y, Liu W, Guo Y, Zhang Z, Jin Y, Li B. Long-Lasting Luminol Chemiluminescence Emission with 1,10-Phenanthroline-2,9-dicarboxylic Acid Copper(II) Complex on Paper. ACS Appl Mater Interfaces 2021; 13:53787-53797. [PMID: 34726366 DOI: 10.1021/acsami.1c14563] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
As most of the known systems are flashtype, long-lasting chemiluminescence (CL) emissions are extremely needed for the application of cold light sources, accurate CL quantitative analysis, and biological mapping. In this work, the flashtype system of luminol was altered to a long lasting CL system just because of the paper substrate. The Cu(II)-based organic complex was loaded on the paper surface, which can trigger luminol-H2O2 to produce a long lasting CL emission for over 30 min. By using 1,10-phenanthroline-2,9-dicarboxylic acid (PDA) as the ligand, a hexacoordinated Cu(II)-based organic complex was synthesized by the simple freeze-drying method. It is interesting that the complex morphology can be controlled by adding different amounts of water in the synthesizing procedure. The complex with a certain size can be definitely trapped in the pores of the cellulose. Then, slow diffusion, which can be attributed to the long lasting CL emission, was produced. With the high catalytic activity of the complex, reactive oxygen species from H2O2 was generated and was responsible for the high CL intensity. By using the paper substrate, the flash-type luminol system can be easily transferred to the long-duration CL system without any extra reagent. This long-lasting emission system was used for hydrogen sulfide detection by the CL imaging method. This paper-based sensor has great potential for CL imaging in the clinical field in the future.
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Affiliation(s)
- Congcong Lv
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Xiaoyan Guo
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Yue Hou
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Wei Liu
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Yanli Guo
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Zixuan Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Yan Jin
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Baoxin Li
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
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Malhotra G, Chapadgaonkar SS. Production of Thermo-Alkali-Stable Xylanase from Bacillus licheniformis Isolated from Natural Hot Water Geyser. J Microsc Ultrastruct 2021; 9:131-135. [PMID: 34729354 PMCID: PMC8507516 DOI: 10.4103/jmau.jmau_21_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 04/10/2020] [Accepted: 07/15/2020] [Indexed: 11/29/2022] Open
Abstract
Context: Xylanase constitutes 20% of world enzyme market. Significantly, they are used in poultry feed, paper pulp, bakery, and textile industries. In view of the increasing demand of the enzyme, it is vital to develop indigenous strains and scalable technologies for the production of industrial enzymes. Aims: The objective of the present paper was to isolate a high-yielding strain of thermo-alkali-stable xylanase-producing bacteria for potential application in paper and pulp and biofuel industry. Methods: Sampling for prospecting of suitable organism was carried out from the places with dead and decaying lignocellulosic waste, and then Congo red screening was employed for the primary isolation of xylanase producers. Results: We report the isolation of 18 different strains of xylanase producer bacteria from natural hot water geyser of Sohna, Haryana, India. Subsequently, two of these isolates were chosen for further studies based on xylanase yield and desirable properties such as thermostability and alkali stability of xylanase produced. Conclusion: Isolate B2 was later identified as Bacillus licheniformis, whereas isolate Y3 was identified as Brevibacillus borstelensis. This strain when cultured at 35°C for 72 h showed xylanase production at 128 U/ml. The molecular weight of xylanase was determined to be 25 kDa. The production was scaled up in a 5-L stirred-tank bioreactor which led to high xylanase concentration of 380 U/ml in the first 48 h of culture.
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Affiliation(s)
- Girisha Malhotra
- Department of Biotechnology, Manav Rachna International Institute of Research and Studies, Faridabad, Haryana, India
| | - Shilpa Samir Chapadgaonkar
- Department of Biotechnology, Manav Rachna International Institute of Research and Studies, Faridabad, Haryana, India
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35
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Yan T, Zhang G, Chai H, Qu L, Zhang X. Flexible Biosensors Based on Colorimetry, Fluorescence, and Electrochemistry for Point-of-Care Testing. Front Bioeng Biotechnol 2021; 9:753692. [PMID: 34650963 PMCID: PMC8505690 DOI: 10.3389/fbioe.2021.753692] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 08/05/2021] [Accepted: 09/13/2021] [Indexed: 12/24/2022] Open
Abstract
With the outbreak and pandemic of COVID-19, point-of-care testing (POCT) systems have been attracted much attention due to their significant advantages of small batches of samples, user-friendliness, easy-to-use and simple detection. Among them, flexible biosensors show practical significance as their outstanding properties in terms of flexibility, portability, and high efficiency, which provide great convenience for users. To construct highly functional flexible biosensors, abundant kinds of polymers substrates have been modified with sufficient properties to address certain needs. Paper-based biosensors gain considerable attention as well, owing to their foldability, lightweight and adaptability. The other important flexible biosensor employs textiles as substrate materials, which has a promising prospect in the area of intelligent wearable devices. In this feature article, we performed a comprehensive review about the applications of flexible biosensors based on the classification of substrate materials (polymers, paper and textiles), and illustrated the strategies to design effective and artificial sensing platforms, including colorimetry, fluorescence, and electrochemistry. It is demonstrated that flexible biosensors play a prominent role in medical diagnosis, prognosis, and healthcare.
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Affiliation(s)
- Tingyi Yan
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Intelligent Wearable Engineering Research Center of Qingdao, Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, Qingdao, China
| | - Guangyao Zhang
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Intelligent Wearable Engineering Research Center of Qingdao, Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, Qingdao, China
| | - Huining Chai
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
| | - Lijun Qu
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Intelligent Wearable Engineering Research Center of Qingdao, Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, Qingdao, China
| | - Xueji Zhang
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China
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Thakur S, Verkicharla PK. Greater axial elongation associated with low accommodative lag: new insights on accommodative lag theory for myopia. Ophthalmic Physiol Opt 2021; 41:1355-1362. [PMID: 34569632 DOI: 10.1111/opo.12893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 05/05/2021] [Revised: 08/19/2021] [Accepted: 08/19/2021] [Indexed: 12/21/2022]
Abstract
PURPOSE We aimed to test the accommodative lag and mechanical tension theories for myopia by assessing the influence of the lag of accommodation on axial elongation by using three different near targets that are known to influence the accommodative response differently. METHODS Forty-two young adults were recruited for the study. Axial length was measured using a non-contact biometer, before and immediately after a 15 minute visual task, with one of the three near targets placed 20 cm from the eye: reading text from a paper, reading text from a smartphone and watching a video on a smartphone. The accommodative response was determined using an open-field autorefractor while the participants viewed the near target monocularly. RESULTS Lag of accommodation was significantly different for the three tasks: watching a video (mean ± standard error of the mean [SEM] 0.92 ± 0.10 D); reading text on the smartphone (0.59 ± 0.08 D); and reading text on paper (0.24 ± 0.09 D). There was a significant (p < 0.05) increase in axial length after reading text from a paper (10.5 ± 1.9 µm after 15-min) and reading text from a smartphone (5.2 ± 2.7 µm), but not after watching a video on a smartphone (-0.5 ± 1.7 µm, p = 0.47). Vitreous chamber depth increased significantly more with the reading tasks compared with watching a video (reading text from a paper and smartphone: 33.9 ± 4 µm and 31.7 ± 4 µm vs. watching a video on a smartphone: 14.6 ± 5 µm, p = 0.001). CONCLUSION Greater changes in axial length associated with the low lag of accommodation failed to support the theory that lag of accommodation during visual tasks could be the trigger for axial elongation. Reading on paper and smartphone at the closest reading distance may stimulate high accommodative demand and axial elongation as a consequence, possibly due to increased "ciliary muscle tension" during accommodation.
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Affiliation(s)
- Swapnil Thakur
- Myopia Research Lab, Prof. Brien Holden Eye Research Centre, Brien Holden Institute of Optometry and Vision Sciences, L V Prasad Eye Institute, Hyderabad, 500034, India
| | - Pavan K Verkicharla
- Myopia Research Lab, Prof. Brien Holden Eye Research Centre, Brien Holden Institute of Optometry and Vision Sciences, L V Prasad Eye Institute, Hyderabad, 500034, India
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Marvasi M, Pangallo D, Cavalieri D, Poyatos-Jiménez F. Editorial: Multi-Omics Revolution in Microbial Cultural Heritage Conservation. Front Microbiol 2021; 12:720509. [PMID: 34526978 PMCID: PMC8437395 DOI: 10.3389/fmicb.2021.720509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 06/30/2021] [Indexed: 12/03/2022] Open
Affiliation(s)
| | - Domenico Pangallo
- Department of Microbial Ecology, Institute of Molecular Biology, Slovak Academy of Sciences, Bratislava, Slovakia
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Gunatilake U, Garcia-Rey S, Ojeda E, Basabe-Desmonts L, Benito-Lopez F. TiO 2 Nanotubes Alginate Hydrogel Scaffold for Rapid Sensing of Sweat Biomarkers: Lactate and Glucose. ACS Appl Mater Interfaces 2021; 13:37734-37745. [PMID: 34340308 PMCID: PMC8397235 DOI: 10.1021/acsami.1c11446] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 07/21/2021] [Indexed: 06/13/2023]
Abstract
Versatile sensing matrixes are essential for the development of enzyme-immobilized optical biosensors. A novel three-dimensional titanium dioxide nanotubes/alginate hydrogel scaffold is proposed for the detection of sweat biomarkers, lactate, and glucose in artificial sweat. Hydrothermally synthesized titanium dioxide nanotubes were introduced to the alginate polymeric matrix, followed by cross-linking nanocomposite with dicationic calcium ions to fabricate the scaffold platform. Rapid colorimetric detection (blue color optical signal) was carried out for both lactate and glucose biomarkers in artificial sweat at 4 and 6 min, respectively. The superhydrophilicity and the capillarity of the synthesized titanium dioxide nanotubes, when incorporated into the alginate matrix, facilitate the rapid transfer of the artificial sweat components throughout the sensor scaffold, decreasing the detection times. Moreover, the scaffold was integrated on a cellulose paper to demonstrate the adaptability of the material to other matrixes, obtaining fast and homogeneous colorimetric detection of lactate and glucose in the paper substrate when image analysis was performed. The properties of this new composite provide new avenues in the development of paper-based sensor devices. The biocompatibility, the efficient immobilization of biological enzymes/colorimetric assays, and the quick optical signal readout behavior of the titanium dioxide nanotubes/alginate hydrogel scaffolds provide a prospective opportunity for integration into wearable devices.
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Affiliation(s)
- Udara
Bimendra Gunatilake
- Microfluidics
Cluster UPV/EHU, Analytical Microsystems & Materials for Lab-on-a-Chip
(AMMa-LOAC) Group, Analytical Chemistry Department, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, Spain
- Microfluidics
Cluster UPV/EHU, BIOMICs Microfluidics Group, Lascaray Research Center, University of the Basque Country UPV/EHU, Avenida Miguel de Unamuno, 3, 01006 Vitoria-Gasteiz, Spain
| | - Sandra Garcia-Rey
- Microfluidics
Cluster UPV/EHU, Analytical Microsystems & Materials for Lab-on-a-Chip
(AMMa-LOAC) Group, Analytical Chemistry Department, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, Spain
- Microfluidics
Cluster UPV/EHU, BIOMICs Microfluidics Group, Lascaray Research Center, University of the Basque Country UPV/EHU, Avenida Miguel de Unamuno, 3, 01006 Vitoria-Gasteiz, Spain
| | - Edilberto Ojeda
- Microfluidics
Cluster UPV/EHU, Analytical Microsystems & Materials for Lab-on-a-Chip
(AMMa-LOAC) Group, Analytical Chemistry Department, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, Spain
- Microfluidics
Cluster UPV/EHU, BIOMICs Microfluidics Group, Lascaray Research Center, University of the Basque Country UPV/EHU, Avenida Miguel de Unamuno, 3, 01006 Vitoria-Gasteiz, Spain
| | - Lourdes Basabe-Desmonts
- Microfluidics
Cluster UPV/EHU, BIOMICs Microfluidics Group, Lascaray Research Center, University of the Basque Country UPV/EHU, Avenida Miguel de Unamuno, 3, 01006 Vitoria-Gasteiz, Spain
- Bioaraba
Health Research Institute, Microfluidics Cluster UPV/EHU, Avenida Miguel de Unamuno, 3, 01006 Vitoria-Gasteiz, Spain
- BCMaterials,
Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48949 Leioa, Spain
- Basque
Foundation of Science, IKERBASQUE, María Díaz Haroko Kalea, 3, 48013 Bilbao, Spain
| | - Fernando Benito-Lopez
- Microfluidics
Cluster UPV/EHU, Analytical Microsystems & Materials for Lab-on-a-Chip
(AMMa-LOAC) Group, Analytical Chemistry Department, University of the Basque Country UPV/EHU, Barrio Sarriena s/n, 48940 Leioa, Spain
- Bioaraba
Health Research Institute, Microfluidics Cluster UPV/EHU, Avenida Miguel de Unamuno, 3, 01006 Vitoria-Gasteiz, Spain
- BCMaterials,
Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48949 Leioa, Spain
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Guha A, Kalkus TJ, Schroeder TBH, Willis OG, Rader C, Ianiro A, Mayer M. Powering Electronic Devices from Salt Gradients in AA-Battery-Sized Stacks of Hydrogel-Infused Paper. Adv Mater 2021; 33:e2101757. [PMID: 34165826 DOI: 10.1002/adma.202101757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 05/17/2021] [Indexed: 06/13/2023]
Abstract
Strongly electric fish use gradients of ions within their bodies to generate stunning external electrical discharges; the most powerful of these organisms, the Atlantic torpedo ray, can produce pulses of over 1 kW from its electric organs. Despite extensive study of this phenomenon in nature, the development of artificial power generation schemes based on ion gradients for portable, wearable, or implantable human use has remained out of reach. Previously, an artificial electric organ inspired by the electric eel demonstrated that electricity generated from ion gradients within stacked hydrogels can exceed 100 V. The current of this power source, however, was too low to power standard electronics. Here, an artificial electric organ inspired by the unique morphologies of torpedo rays for maximal current output is introduced. This power source uses a hybrid material of hydrogel-infused paper to create, organize, and reconfigure stacks of thin, arbitrarily large gel films in series and in parallel. The resulting increase in electrical power by almost two orders of magnitude compared to the original eel-inspired design makes it possible to power electronic devices and establishes that biology's mechanism of generating significant electrical power can now be realized from benign and soft materials in a portable size.
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Affiliation(s)
- Anirvan Guha
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Trevor J Kalkus
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Thomas B H Schroeder
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA, 02138, USA
| | - Oliver G Willis
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Chris Rader
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Alessandro Ianiro
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Michael Mayer
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
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Jordan JH, Cheng HN, Easson MW, Yao W, Condon BD, Gibb BC. Effect of Nanocellulose on the Properties of Cottonseed Protein Isolate as a Paper Strength Agent. Materials (Basel) 2021; 14:4128. [PMID: 34361323 PMCID: PMC8347482 DOI: 10.3390/ma14154128] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/17/2021] [Accepted: 07/22/2021] [Indexed: 11/16/2022]
Abstract
Currently, there is an increasing interest in the use of biopolymers in industrial applications to replace petroleum-based additives, since they are abundantly available, renewable and sustainable. Cottonseed protein is a biopolymer that, when used as a modifier, has shown improved performance for wood adhesives and paper products. Thus, it would be useful to explore the feasibility of using cellulose nanomaterials to further improve the performance of cottonseed protein as a paper strength agent. This research characterized the performance of cottonseed protein isolate with/without cellulose nanofibers (CNFs) and cellulose nanocrystals (CNCs) to increase the dry strength of filter paper. An application of 10% protein solution with CNCs (10:1) or CNFs (50:1) improved the elongation at break, tensile strength and modulus of treated paper products compared to the improved performance of cottonseed protein alone. Further analysis using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) indicated that the cottonseed protein/nanocellulose composites interacted with the filter paper fibers, imparting an increased dry strength.
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Affiliation(s)
- Jacobs H. Jordan
- The Southern Regional Research Center, Agricultural Research Service, USDA, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, USA; (J.H.J.); (H.N.C.); (B.D.C.)
| | - Huai N. Cheng
- The Southern Regional Research Center, Agricultural Research Service, USDA, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, USA; (J.H.J.); (H.N.C.); (B.D.C.)
| | - Michael W. Easson
- The Southern Regional Research Center, Agricultural Research Service, USDA, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, USA; (J.H.J.); (H.N.C.); (B.D.C.)
| | - Wei Yao
- Department of Chemistry, 2015 Percival Stern Hall, 6400 Freret Street, Tulane University, New Orleans, LA 70118, USA; (W.Y.); (B.C.G.)
| | - Brian D. Condon
- The Southern Regional Research Center, Agricultural Research Service, USDA, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, USA; (J.H.J.); (H.N.C.); (B.D.C.)
| | - Bruce C. Gibb
- Department of Chemistry, 2015 Percival Stern Hall, 6400 Freret Street, Tulane University, New Orleans, LA 70118, USA; (W.Y.); (B.C.G.)
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41
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Sąsiadek E, Olejnik K, Kozicki M. Paper Doped with Polyacrylonitrile Fibres Modified with 10,12-Pentacosadiynoic Acid. Materials (Basel) 2021; 14:4006. [PMID: 34300925 DOI: 10.3390/ma14144006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 11/17/2022]
Abstract
This work reports a modification of a fibrous cellulose material (paper) by the addition of polyacrylonitrile (PAN) fibres doped with 10,12–pentacosadiynoic acid (PDA). The fibres are sensitive to ultraviolet (UV) light. When the paper containing PAN–PDA is irradiated with UV light it changes colour to blue as a consequence of interaction of the light with PDA. The colour intensity is related to the absorbed dose, content of PAN–PDA fibres in the paper and the wavelength of UV radiation. The features of the paper are summarised after reflectance spectrophotometry and scanning microscopy analyses. All the properties of the modified paper were tested in accordance with adequate ISO standards. Moreover, a unique method for assessing the unevenness of the paper surface and the quality of printing was proposed by using a Python script (RGBreader) for the analysis of RGB colour channels. The modification applied to the paper can serve as a paper security system. The modified paper can act also as a UV radiation indicator.
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Abstract
BACKGROUND To perform the citation and content analysis of 100 articles on Hallux valgus from the most cited to the least. MATERIALS AND METHODS Articles published on Hallux valgus between 1980 and 2020 were analyzed by making use of the Web of Science database. Articles were ranked from most cited to the least. Content analysis of all articles was also carried out. Original research articles, reviews, and clinical trials were included in the study whereas case reports were excluded from the study. RESULTS The total number of citations of the 100 most-cited articles was 7,697. The most-cited article was 'Prevalence of hallux valgus in the general population; systematic review and meta-analysis' published by Sheere Nix in Journal of Foot and Ankle Research in 2010. The country where the articles were mostly produced was USA (n = 46). The most interesting issue was the osteotomy techniques and changes in Hallux valgus surgery. CONCLUSION The treatment of the Hallux valgus disease is still discussed today. Citation analyses have shown that surgical developments related to HV surgery still attract attention, and this information will be updated continuously in line with the increasing number of articles.
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Affiliation(s)
- Sezgin Bahadır Tekin
- Surgeon, Department of Orthopedic Surgery, 25 Aralık State Hospital, Şehitkamil, Gaziantep, Turkey.
| | - Bahri Bozgeyik
- Surgeon, Department of Orthopedic Surgery, Gaziantep University Hospital, Şahinbey, Gaziantep, Turkey
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Resnik M, Levičnik E, Gosar Ž, Zaplotnik R, Kovač J, Ekar J, Mozetič M, Junkar I. The Oleofobization of Paper via Plasma Treatment. Polymers (Basel) 2021; 13:polym13132148. [PMID: 34209876 PMCID: PMC8272229 DOI: 10.3390/polym13132148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/02/2021] [Revised: 06/25/2021] [Accepted: 06/25/2021] [Indexed: 11/17/2022] Open
Abstract
Cellulose is a promising biomass material suitable for high volume applications. Its potential lies in sustainability, which is becoming one of the leading trends in industry. However, there are certain drawbacks of cellulose materials which limit their use, especially their high wettability and low barrier properties, which can be overcome by applying thin coatings. Plasma technologies present a high potential for deposition of thin environmentally friendly and recyclable coatings. In this paper, two different plasma reactors were used for coating two types of cellulose-based substrates with hexamethyldisiloxane (HMDSO). The changes in surface characteristics were measured by atomic force microscopy (AFM), scanning electron microscopy (SEM), surface free energy and contact angles measurements, X-ray photoelectron spectroscopy (XPS), and secondary ion mass spectrometry (SIMS). Successful oleofobization was observed for an industrial scale reactor where pure HMDSO was used in the absence of oxygen.
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Affiliation(s)
- Matic Resnik
- Department of Surface Engineering, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (E.L.); (R.Z.); (J.K.); (J.E.); (M.M.); (I.J.)
- Correspondence:
| | - Eva Levičnik
- Department of Surface Engineering, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (E.L.); (R.Z.); (J.K.); (J.E.); (M.M.); (I.J.)
| | - Žiga Gosar
- Elvez d.o.o., Ulica Antona Tomšiča 35, 1294 Višnja Gora, Slovenia;
| | - Rok Zaplotnik
- Department of Surface Engineering, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (E.L.); (R.Z.); (J.K.); (J.E.); (M.M.); (I.J.)
| | - Janez Kovač
- Department of Surface Engineering, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (E.L.); (R.Z.); (J.K.); (J.E.); (M.M.); (I.J.)
| | - Jernej Ekar
- Department of Surface Engineering, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (E.L.); (R.Z.); (J.K.); (J.E.); (M.M.); (I.J.)
| | - Miran Mozetič
- Department of Surface Engineering, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (E.L.); (R.Z.); (J.K.); (J.E.); (M.M.); (I.J.)
| | - Ita Junkar
- Department of Surface Engineering, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia; (E.L.); (R.Z.); (J.K.); (J.E.); (M.M.); (I.J.)
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Samyn P. Active Barrier Coating for Packaging Paper with Controlled Release of Sunflower Oils. Molecules 2021; 26:3561. [PMID: 34200922 DOI: 10.3390/molecules26123561] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 01/19/2023] Open
Abstract
The use of paper as a sustainable packaging material is favored, but it lacks sufficient barrier properties in terms of water repellence and oil resistance. Novel approaches consider active packaging materials or coatings with controlled release providing additional functionality for delivery of specific components to the surface. In this study, the development of a waterborne coating with organic nanoparticles and encapsulated sunflower oils is presented as a system for thermal release of the oil and on-demand tuning of the final barrier properties of the paper substrate. After synthesis of the nanoparticles, it seems that the encapsulation of various grades of sunflower oil (i.e., either poly-unsaturated or mono-unsaturated) strongly affects the encapsulation efficiency and thermal release profiles. The water contact angles are controlled by the oil release and chemical surface composition of the coating upon thermal heating. The oil resistance of the paper improves as a more continuous oil film is formed during thermal release. In particular, the chemical surface composition of the paper coatings is detailed by means of micro-Raman spectroscopy and surface imaging, which provide an analytical quantification tool to evaluate surface coverage, oil delivery, and variations in organic coating moieties.
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Co R, Hug LA. Prediction, enrichment and isolation identify a responsive, competitive community of cellulolytic microorganisms from a municipal landfill. FEMS Microbiol Ecol 2021; 97:6261183. [PMID: 33930130 DOI: 10.1093/femsec/fiab065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 12/09/2020] [Accepted: 04/27/2021] [Indexed: 01/04/2023] Open
Abstract
Landfills are engineered, heterogeneously contaminated sites containing large reservoirs of paper waste. Cellulose degradation is an important process within landfill microbial ecology, and these anoxic, saturated environments are prime locations for discovery of cellulases that may offer improvements on industrial cellulose degradation efforts. We sampled leachate from three locations within a municipal landfill, a leachate collection cistern, and groundwater from an adjacent aquifer to identify cellulolytic populations and their associated cellulases. Metagenomic sequencing identified wide-spread and taxonomically diverse cellulolytic potential, with a notable scarcity of predicted exocellulases. 16S rRNA amplicon sequencing detected nine landfill microorganisms enriched in a customized leachate medium amended with microcrystalline cellulose or common paper stocks. Paper-enrichment cultures showed competition dynamics in response to the specific composition (lignin: hemi-cellulose: cellulose) of the different paper stocks. From leachate biomass, four novel cellulolytic bacteria were isolated, including two with the capacity for cellulolysis at industrially relevant temperatures. None of the isolates demonstrated exocellulase activity, consistent with the metagenome-based predictions. However, there was very little overlap between metagenome-derived predicted cellulolytic organisms, organisms enriched on paper sources, or the isolates, suggesting the landfill cellulolytic community is at low abundance but able to rapidly respond to introduced substrates.
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Affiliation(s)
- Rebecca Co
- Dapartment of Biology, University of Waterloo, 200 University Ave, Waterloo, ON, N2L3G1, Canada
| | - Laura A Hug
- Dapartment of Biology, University of Waterloo, 200 University Ave, Waterloo, ON, N2L3G1, Canada
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Vaithanomsat P, Kongsin K, Trakunjae C, Boonyarit J, Jarerat A, Sudesh K, Chollakup R. Biosynthesized Poly(3-Hydroxybutyrate) on Coated Pineapple Leaf Fiber Papers for Biodegradable Packaging Application. Polymers (Basel) 2021; 13:polym13111733. [PMID: 34073164 PMCID: PMC8198808 DOI: 10.3390/polym13111733] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 04/23/2021] [Revised: 05/15/2021] [Accepted: 05/16/2021] [Indexed: 12/14/2022] Open
Abstract
This paper is aimed at investigating the usage of biosynthesized poly(3-hydroxybutyrate) (P(3-HB)) for a coating on pineapple leaf fiber paper (PLFP). For this purpose, (P(3-HB)) was produced by Rhodococcus pyridinivorans BSRT1-1, a highly potential P(3-HB) producing bacterium, with a weight-average molecular weight (Mw) of 6.07 × 10 −5 g/mol. This biosynthesized P(3-HB) at 7.5% (w/v) was then coated on PLFP through the dip-coating technique with chloroform used as a solvent. The respective coated PLFP showed that P(3-HB) could be well coated all over on the PLFP surface as confirmed by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The brightness and mechanical properties of PLFP could be improved by coating with biosynthesized P(3-HB) in comparison to commercially available P(3-HB) and non-coated PLFP. Furthermore, coating of P(3-HB) significantly increased the water drop penetration time on the surface of PLFP and was similar to that of the commercial P(3-HB) with the same content. The results showed that all the coated PLPF samples can be degraded under the soil burial test conditions. We have demonstrated that the P(3-HB) coated PLFP paper has the ability to prevent water drop penetration and could undergo biodegradation. Taken together, the P(3-HB) coated PLFP can be applied as a promising biodegradable paper packaging.
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Affiliation(s)
- Pilanee Vaithanomsat
- Kasetsart Agricultural and Agro-Industrial Product Improvement Institute (KAPI), Kasetsart University, Bangkok 10900, Thailand; (P.V.); (K.K.); (C.T.); (J.B.)
- Center for Advanced Studies in Tropical Natural Resources, National Research University-Kasetsart University, Kasetsart University, Bangkok 10900, Thailand
| | - Kunat Kongsin
- Kasetsart Agricultural and Agro-Industrial Product Improvement Institute (KAPI), Kasetsart University, Bangkok 10900, Thailand; (P.V.); (K.K.); (C.T.); (J.B.)
- Biotechnology of Biopolymers and Bioactive Compounds Special Research Unit, Department of Biotechnology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand
| | - Chanaporn Trakunjae
- Kasetsart Agricultural and Agro-Industrial Product Improvement Institute (KAPI), Kasetsart University, Bangkok 10900, Thailand; (P.V.); (K.K.); (C.T.); (J.B.)
- Ecobiomaterial Research Laboratory, School of Biological Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia;
| | - Jirachaya Boonyarit
- Kasetsart Agricultural and Agro-Industrial Product Improvement Institute (KAPI), Kasetsart University, Bangkok 10900, Thailand; (P.V.); (K.K.); (C.T.); (J.B.)
| | - Amnat Jarerat
- Food Technology Program, Kanchanaburi Campus, Mahidol University, Kanchanaburi 71150, Thailand;
| | - Kumar Sudesh
- Ecobiomaterial Research Laboratory, School of Biological Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia;
| | - Rungsima Chollakup
- Kasetsart Agricultural and Agro-Industrial Product Improvement Institute (KAPI), Kasetsart University, Bangkok 10900, Thailand; (P.V.); (K.K.); (C.T.); (J.B.)
- Correspondence: ; Tel.: +66-2-942-8600
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Tritschler U, Zlotnikov I, Fratzl P, Schlaad H, Grüner S, Cölfen H. Corrigendum: Gas barrier properties of bio-inspired laponite-LC polymer hybrid films (2016 Bioinsp. Biomim.11 035005). Bioinspir Biomim 2021; 16:049502. [PMID: 34011697 DOI: 10.1088/1748-3190/abf3b2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 03/30/2021] [Indexed: 06/12/2023]
Affiliation(s)
- Ulrich Tritschler
- University of Konstanz, Physical Chemistry, Universitätsstraße 10, D-78457 Konstanz, Germany
| | - Igor Zlotnikov
- Max-Planck-Institute of Colloids and Interfaces, Department of Biomaterials, Research Campus Golm, D-14424 Potsdam, Germany
| | - Peter Fratzl
- Max-Planck-Institute of Colloids and Interfaces, Department of Biomaterials, Research Campus Golm, D-14424 Potsdam, Germany
| | - Helmut Schlaad
- University of Potsdam, Institute of Chemistry, Karl-Liebknecht-Straße 24-25, D-14476 Potsdam, Germany
| | - Simon Grüner
- Material Physics, BASF SE, GMC/R - B001, 67056 Ludwigshafen, Germany
| | - Helmut Cölfen
- University of Konstanz, Physical Chemistry, Universitätsstraße 10, D-78457 Konstanz, Germany
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Chen J, Tran VT, Du H, Wang J, Chen C. A Direct-Writing Approach for Fabrication of CNT/ Paper-Based Piezoresistive Pressure Sensors for Airflow Sensing. Micromachines (Basel) 2021; 12:504. [PMID: 33946362 PMCID: PMC8146501 DOI: 10.3390/mi12050504] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/21/2021] [Accepted: 04/27/2021] [Indexed: 12/29/2022]
Abstract
Airflow sensor is a crucial component for monitoring environmental airflow conditions in many engineering fields, especially in the field of aerospace engineering. However, conventional airflow sensors have been suffering from issues such as complexity and bulk in structures, high cost in fabrication and maintenance, and low stability and durability. In this work, we developed a facile direct-writing method for fabricating a low-cost piezoresistive element aiming at high-performance airflow sensing, in which a commercial pen was utilized to drop solutions of single-walled carbon nanotubes onto tissue paper to form a piezoresistive sensing element. The encapsulated piezoresistive element was tested for electromechanical properties under two loading modes: one loading mode is the so-called pressure mode in which the piezoresistive element is pressed by a normal pressure, and another mode is the so-called bending mode in which the piezoresistive element is bended as a cantilever beam. Unlike many other developed airflow sensors among which the sensing elements are normally employed as cantilever beams for facing winds, we designed a fin structure to be incorporated with the piezoresistive element for airflow sensing; the main function of the fin is to face winds instead of the piezoresistive element, and subsequently transfer and enlarge the airflow pressure to the piezoresistive element for the normal pressure loading mode. With this design, the piezoresistive element can also be protected by avoiding experiencing large strains and direct contact with external airflows so that the stability and durability of the sensor can be maintained. Moreover, we experimentally found that the performance parameters of the airflow sensor could be effectively tuned by varying the size of the fin structure. When the fin sizes of the airflow sensors were 20 mm, 30 mm, and 40 mm, the detection limits and sensitivities of the fabricated airflow sensors were measured as 8.2 m/s, 6.2 m/s, 3.2 m/s, 0.0121 (m/s)-2, 0.01657 (m/s)-2, and 0.02264 (m/s)-2, respectively. Therefore, the design of the fin structure could pave an easy way for adjusting the sensor performance without changing the sensor itself toward different application scenarios.
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Affiliation(s)
- Jinyan Chen
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; (J.C.); (J.W.)
| | - Van-Thai Tran
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; (V.-T.T.); (H.D.)
| | - Hejun Du
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore; (V.-T.T.); (H.D.)
| | - Junshan Wang
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; (J.C.); (J.W.)
| | - Chao Chen
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; (J.C.); (J.W.)
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49
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Raina SK, Kumar R, Natrajan S, Gilada I, Garg S, Dhariwal AC, Galvankar S, Khaparde SD, Bhatt R, Bodhankar U, Agarwal P. India's need for long-term solutions to COVID-19-like pandemics: A policy paper by Organized Medicine Academic Guild. J Family Med Prim Care 2021; 10:1508-1511. [PMID: 34123882 PMCID: PMC8144750 DOI: 10.4103/jfmpc.jfmpc_2220_20] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/09/2020] [Accepted: 12/16/2020] [Indexed: 11/04/2022] Open
Abstract
The entire world seems to have responded to COVID-19 pandemic in a knee-jerk manner with a short mindset without building on the existing strengths of public health infrastructure. National governments cannot be blamed for this as we are dealing with a crisis that comes once in a lifetime. Realising this, the Organized Medicine Academic Guild (OMAG) an association of major health associations in this country has suggested measures for long-term solutions to COVID-19-like pandemics in the form of a policy paper by OMAG.
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Affiliation(s)
- Sunil K Raina
- Department of Community Medicine, Dr. R.P. Government Medical College, Tanda, Himachal Pradesh, India
| | - Raman Kumar
- Academy of Family Physicians of India, New Delhi, India
| | - S Natrajan
- Aditya Jyot Eye Hospital, Wadala, Mumbai, India
| | - Ishwar Gilada
- India Unison Medicare and Research Centre, Alibhai Premji Marg, Grant Road-E, Mumbai, Maharashtra, India
| | - Suneela Garg
- Department of Community Medicine, Maulana Azad Medical College, New Delhi, India
| | - A C Dhariwal
- National Vector Borne Disease Control Programme (NVBDCP), Directorate General of Health Services, Ministry of Health and Family Welfare, Florida, USA
| | - Sagar Galvankar
- Department of Emergency Medicine, Sarasota Memorial Hospital Florida State University, Florida, USA
| | - Sunil D Khaparde
- Former Deputy Director General TB Control, Father Muller Medical College, Manglore, Karnataka, India
| | - Ramesh Bhatt
- Department of Dermatology, Father Muller Medical College, Manglore, Karnataka, India
| | - Uday Bodhankar
- Department of Emergency Medicine, AIIMS, New Delhi, India
| | - Praveen Agarwal
- Bodhankar Childrens Hospital, Sharhari, Central Bazaar Road, Nagpur, Maharashtra, India
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50
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Korte R, Schulz S, Brauer B. Chloropropanols (3-MCPD, 1,3-DCP) from food contact materials: GC-MS method improvement, market survey and investigations on the effect of hot water extraction. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 38:904-913. [PMID: 33872118 DOI: 10.1080/19440049.2021.1903569] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The chloropropanols, monochloropropane-1,2-diol (3-MCPD) and 1,3-dichloro-2-propanol (1,3-DCP) are potential contaminants that may be found in food contact materials (FCM) from paper and paperboard that have been treated with certain wet-strength resins. They can migrate from the paper matrix to aqueous food and beverages and, due to their potentially carcinogenic properties, are of increasing interest in quality assurance or official controls of paper-based FCM. We hereby describe an improved method for the analysis of 3-MCPD and 1,3-DCP in water extracts of FCM making use of 1-chloro-3-methoxy-2-propanol (CMP) as a novel internal standard. The LOD and LOQ were determined to be 0.4 µg/L and 1.2 µg/L for both analytes, making the method appropriate for the quantification of 3-MCPD and 1,3-DCP below the current legal limits. The method was applied to an extensive market survey of food contact articles made from paper and paperboard including 674 samples. The survey revealed that a high percentage of the products available on the market (e.g., up to 55% of the analysed drinking straws) exceed the BfR limits with values of up to 327 µg/L 3-MCPD and 20 µg/L 1,3-DCP detected in the cold water extract. Remarkable differences were observed concerning the release of 3-MCPD and 1,3-DCP from different kinds of paper-based FCM products, with drinking straws, cupcake cases, bagasse bowls and kitchen rolls showing particularly high rates (>10%) of non-conformity with the legal limits. A number of samples with especially high concentrations were additionally analysed by hot water extraction, which surprisingly yielded considerably lower results for the release of 3-MCPD and 1,3-DCP than cold water extraction. The results indicate that cold water extraction is the most sensitive method to detect the migration and control the risk of exposure to 3-MCPD and 1,3-DCP.
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Affiliation(s)
- Robin Korte
- Department for Food Contact Materials, Chemical and Veterinary Analytical Institute Münsterland-Emscher-Lippe (CVUA-MEL), Münster, Germany
| | - Susann Schulz
- Department for Food Contact Materials, Chemical and Veterinary Analytical Institute Münsterland-Emscher-Lippe (CVUA-MEL), Münster, Germany
| | - Beate Brauer
- Department for Food Contact Materials, Chemical and Veterinary Analytical Institute Münsterland-Emscher-Lippe (CVUA-MEL), Münster, Germany
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