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Yang X, Wang F, Gao Y, Zhang H, Liu Z, Feng J. Compatibilization of Immiscible Polypropylene/Poly(methyl methacrylate) Blends by Silica Particles with Janus and Random Component-Selective Grafts. ACS Appl Mater Interfaces 2024; 16:19615-19624. [PMID: 38587106 DOI: 10.1021/acsami.4c01934] [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: 04/09/2024]
Abstract
Introducing component-selective polymer chains onto the surface of a particle is an effective approach to improve the compatibilization efficiency of a particle-based compatibilizer. In this study, two particles with different kinds of component-selective polymer chains that have the same length and similar density but different graft locations were synthesized and their compatibilization effects were comparatively investigated. It was found that compared with the particle with homogeneous PMMA and PP grafts (R-P), the particle with a hemisphere of poly(methyl methacrylate) (PMMA) grafts and other hemisphere of polypropylene (PP) chains (J-P) showed a better compatibilization effect under equal loadings, although both particles exhibited high efficiency. The better compatibilization effect of particles with Janus grafts may be attributed to the stronger entanglements between grafted polymer chains and selective individual components. This work suggests that optimizing the graft location of a particle is an effective strategy for improving its compatibilization efficiency and helpful for the design of advanced particle compatibilizers.
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Affiliation(s)
- Xin Yang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, P. R. China
| | - Fushan Wang
- Lanzhou Petrochemical Corporation of PetroChina, Lanzhou 730060, P. R. China
| | - Yan Gao
- Lanzhou Petrochemical Corporation of PetroChina, Lanzhou 730060, P. R. China
| | - Hongxing Zhang
- Lanzhou Petrochemical Corporation of PetroChina, Lanzhou 730060, P. R. China
| | - Zhiqin Liu
- Lanzhou Petrochemical Corporation of PetroChina, Lanzhou 730060, P. R. China
| | - Jiachun Feng
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, P. R. China
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2
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Hallab NJ, Hallab SR, Alexander A, Pourzal R. Characterization of residual debris on packaged hip arthroplasty stems demonstrates the dominance of less than 10 μm sized particulate: Updated USP788 guidelines for orthopedic implants. J Biomed Mater Res B Appl Biomater 2024; 112:e35387. [PMID: 38340016 DOI: 10.1002/jbm.b.35387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 10/19/2023] [Accepted: 01/27/2024] [Indexed: 02/12/2024]
Abstract
Past evaluation of particle contamination on packaged implants has typically been conducted using US Pharmacopeia (USP) 788, a 1970s pharmaceutical guideline created to evaluate contaminant particles in injectable fluids and syringes. Our objective was to reestablish relevant acceptance criteria for residual orthopedic and other implant debris, including smaller particles (i.e., <10 μm in diameter). Packaged total hip arthroplasty (THA) titanium (Ti6Al4V)-alloy femoral stems were used (hydroxyapatite [HA]-coated and non-coated stems). Short-term ultrasonication and longer-term 24-hour soak/agitation methods were used to elute surface-bound contaminant particles, and released particles were analyzed via scanning electron microscopy, energy-dispersive x-ray analysis, image analysis, and particle characterization. For HA-coated THA-stems, >99% of eluted particles were calcium phosphate. For plain non-coated THA-stems, >99% of eluted particles were titanium-alloy-based. The number-based median size of particles in both groups was approximately 1.5 μm in diameter despite being composed of different materials. The total volume of particulate removed from HA-coated stems was 0.037 mm3 (671 × 103 particles total), which was approximately >50-fold more volume than that on plain non-coated stems at 0.0006 mm3 (89 × 103 particles total). Only non-coated THA stems passed reestablished USP788 acceptance criteria, compared by using equivalent total volumes of contaminant particulate within new and legacy guideline ranges of >10 and >25 μm ECD, that is, <1.0 × 107 particles for <1 μm diameter in size, <600,000 for <1-10 μm, <6000 for 10-25 μm and <600 for >25 μm. These results fill a knowledge gap on how much residual debris can be expected to exist on packaged implants and can be used as a basis for updating acceptance criteria (i.e., termed USP788-Implant [USP788-I]). Residual implant particulate assessment is critical given the increasing implant complexity and new manufacturing techniques (e.g., additive manufacturing).
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Affiliation(s)
- Nadim J Hallab
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois, USA
- Department of Biomedical Engineering, Bioengineering Solutions Inc, Chicago, Illinois, USA
| | - Salem R Hallab
- Department of Biomedical Engineering, Bioengineering Solutions Inc, Chicago, Illinois, USA
| | - Anastasia Alexander
- Department of Biomedical Engineering, Bioengineering Solutions Inc, Chicago, Illinois, USA
| | - Robin Pourzal
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois, USA
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3
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Chen S, Jiang Y, Zhu Z, Zhang Q, Zhang C, Zhang Q, Qian W, Zhang S, Wei F. Fluidization and Application of Carbon Nano Agglomerations. Adv Sci (Weinh) 2024; 11:e2306355. [PMID: 38115551 PMCID: PMC10885674 DOI: 10.1002/advs.202306355] [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: 09/04/2023] [Revised: 11/30/2023] [Indexed: 12/21/2023]
Abstract
Carbon nanomaterials are unique with excellent functionality and diverse structures. However, agglomerated structures are commonly formed because of small-size effects and surface effects. Their hierarchical assembly into micro particles enables carbon nanomaterials to break the boundaries of classical Geldart particle classification before stable fluidization under gas-solid interactions. Currently, there are few systematic reports regarding the structural evolution and fluidization mechanism of carbon nano agglomerations. Based on existing research on carbon nanomaterials, this article reviews the fluidized structure control and fluidization principles of prototypical carbon nanotubes (CNTs) as well as their nanocomposites. The controlled agglomerate fluidization technology leads to the successful mass production of agglomerated and aligned CNTs. In addition, the self-similar agglomeration of individual ultralong CNTs and nanocomposites with silicon as model systems further exemplify the important role of surface structure and particle-fluid interactions. These emerging nano agglomerations have endowed classical fluidization technology with more innovations in advanced applications like energy storage, biomedical, and electronics. This review aims to provide insights into the connections between fluidization and carbon nanomaterials by highlighting their hierarchical structural evolution and the principle of agglomerated fluidization, expecting to showcase the vitality and connotation of fluidization science and technology in the new era.
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Affiliation(s)
- Sibo Chen
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Yaxin Jiang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Zhenxing Zhu
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Qi Zhang
- Beijing Research Institute of Chemical Industry, SINOPEC, Beijing, 100013, China
| | - Chenxi Zhang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
- Ordos Laboratory, Inner Mongolia, 017000, China
| | - Qiang Zhang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Weizhong Qian
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
- Ordos Laboratory, Inner Mongolia, 017000, China
| | - Shijun Zhang
- Beijing Research Institute of Chemical Industry, SINOPEC, Beijing, 100013, China
| | - Fei Wei
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
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4
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Ma Q, Lim CS. Molecular Activation of NLRP3 Inflammasome by Particles and Crystals: A Continuing Challenge of Immunology and Toxicology. Annu Rev Pharmacol Toxicol 2024; 64:417-433. [PMID: 37708431 PMCID: PMC10842595 DOI: 10.1146/annurev-pharmtox-031023-125300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
Particles and crystals constitute a unique class of toxic agents that humans are constantly exposed to both endogenously and from the environment. Deposition of particulates in the body is associated with a range of diseases and toxicity. The mechanism by which particulates cause disease remains poorly understood due to the lack of mechanistic insights into particle-biological interactions. Recent research has revealed that many particles and crystals activate the NLRP3 inflammasome, an intracellular pattern-recognition receptor. Activated NLRP3 forms a supramolecular complex with an adaptor protein to activate caspase 1, which in turn activates IL-1β and IL-18 to instigate inflammation. Genetic ablation and pharmacological inhibition of the NLRP3 inflammasome dampen inflammatory responses to particulates. Nonetheless, how particulates activate NLRP3 remains a challenging question. From this perspective, we discuss our current understanding of and progress on revealing the function and mode of action of the NLRP3 inflammasome in mediating adaptive and pathologic responses to particulates in health and disease.
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Affiliation(s)
- Qiang Ma
- Receptor Biology Laboratory, Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia, USA;
| | - Chol Seung Lim
- Receptor Biology Laboratory, Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia, USA;
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5
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Yang W, Wang L, Fan L, Li W, Zhao Y, Shang L, Jiang M. Photothermal Responsive Microcarriers Encapsulated With Cangrelor and 5-Fu for Colorectal Cancer Treatment. Small Methods 2023:e2301002. [PMID: 38127997 DOI: 10.1002/smtd.202301002] [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: 08/05/2023] [Revised: 11/29/2023] [Indexed: 12/23/2023]
Abstract
Localized chemotherapy is emerging as a potential strategy for cancer treatment due to its low systemic toxicity. However, the immune evasion of tumor cells and the lack of an intelligent design of the delivery system limit its clinical application. Herein, photothermal responsive microcarriers are designed by microfluidic electrospray for colorectal tumor treatment. The microcarriers loaded with Cangrelor, 5-FU and MXene (G-M@F/C+NIR) show sustained delivery of antiplatelet drug Cangrelor, thus inhibiting the activity of platelets, interactions of platelet-tumor cell, as well as the tumor cells invasion and epithelial-mesenchymal transition (EMT). In addition, the sustained delivery of chemotherapeutics 5-FU and the photothermal effect provided by MXene enable the microcarriers to inhibit tumor cells proliferation and migration. In vivo studies validate that the G-M@F/C+NIR microcarriers significantly inhibites tumor growth, decreased the expression of Ki-67 in tumor cells and vascular endothelial growth factor (VEGF) in the tumor microenvironment, while increased the expression of E-cadherin. It is believe that by means of the proposed photothermal responsive microcarriers, the synergistic strategy of platelet inhibition, chemotherapy, and photothermal therapy can find practical applications in cancer treatment.
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Affiliation(s)
- Wei Yang
- Clinical Laboratory Center, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Li Wang
- Clinical Laboratory Center, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Lu Fan
- Clinical Laboratory Center, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Wenzhao Li
- Clinical Laboratory Center, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
| | - Yuanjin Zhao
- Clinical Laboratory Center, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China
| | - Luoran Shang
- Zhongshan-Xuhui Hospital and the Shanghai Key Laboratory of Medical Epigenetics the International Co-laboratory of Medical Epigenetics and Metabolism Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Minghua Jiang
- Clinical Laboratory Center, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China
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Brag P, Piotter V, Plewa K, Klein A, Herzfeldt M, Umbach S. Development and Production of Artificial Test Swarf to Examine Wear Behavior of Running Engine Components-Part 2: Experimentally Derived Designs. Materials (Basel) 2023; 16:6276. [PMID: 37763554 PMCID: PMC10532478 DOI: 10.3390/ma16186276] [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: 08/02/2023] [Revised: 08/31/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023]
Abstract
In subtractive manufacturing processes, swarf, burrs or other residues are produced, which can impair the function of a tribological system (e.g., journal bearings). To prevent premature engine damage, cleanliness requirements are defined for production processes. Damaging particle tests are an experimental approach for validating these defined cleanliness requirements. This methodical approach is not yet widely used. For one, the test setup must be developed and proven for the respective application. For another, in order to carry out the tests in a systematic manner, defined test particles with properties similar to those of the contaminants encountered in reality are required. In the second part of the paper, the process chain for manufacturing artificial test swarf by micro powder injection molding (MicroPIM) is described. The size and shape of the swarf were derived from real swarf via several abstraction processes. Although certain design guidelines for MicroPIM parts could not be taken into account, the targeted manufacturing tolerances were achieved in most cases. During demolding, it became apparent that the higher ejection forces of the free-formed geometries must be taken more into account in the design of the mold. The experiments on the test setup also revealed that the artificial test swarf was unexpectedly brittle and was therefore ground up in the bearing gap without causing any substantial damage to the bearing. Thus, the artificial test swarf in its current sintered state is not a suitable substitute for micromilled swarf. However, MicroPIM could still be used to manufacture test particles in applications involving lower mechanical forces.
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Affiliation(s)
- Patrick Brag
- Department of Ultraclean Technology and Micromanufacturing, Fraunhofer Institute for Manufacturing Engineering and Automation IPA, Nobelstrasse 12, 70569 Stuttgart, Germany
| | - Volker Piotter
- Institute for Applied Materials (IAM-WK), Karlsruhe Institute of Technology (KIT), Hermann-von Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (V.P.); (K.P.); (A.K.)
| | - Klaus Plewa
- Institute for Applied Materials (IAM-WK), Karlsruhe Institute of Technology (KIT), Hermann-von Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (V.P.); (K.P.); (A.K.)
| | - Alexander Klein
- Institute for Applied Materials (IAM-WK), Karlsruhe Institute of Technology (KIT), Hermann-von Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; (V.P.); (K.P.); (A.K.)
| | - Mirko Herzfeldt
- AuE Kassel GmbH, Heinrich-Hertz-Str. 52, 34123 Kassel, Germany;
| | - Sascha Umbach
- Department of Machine Elements and Engineering Design (iaf), University of Kassel, Mönchebergstr. 7, 34125 Kassel, Germany;
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Abstract
Breast cancer is the most common malignant tumor in female patients. Along with surgery, radiotherapy is one of the most commonly prescribed treatments for breast cancer. Over the past few decades, breast cancer radiotherapy technology has significantly improved. Nevertheless, related posttherapy complications should not be overlooked. Common complications include dose-related coronary toxicity, radiation pneumonia, and the risk of second primary cancer of the contralateral breast. Particle radiotherapy with protons or carbon ions is widely attracting interest as a potential competitor to conventional photon radiotherapy because of its superior physical and biological characteristics. This article summarizes the results of clinical research on proton and carbon-ion radiotherapy for treating breast cancer.
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Affiliation(s)
- Hanguang Ruan
- Department of Radiation Oncology, Gunma University, Maebashi, Japan
- Gunma University Heavy Ion Medical Center, Gunma University, Maebashi, Gunma, Japan
| | - Masahiko Okamoto
- Department of Radiation Oncology, Gunma University, Maebashi, Japan
- Gunma University Heavy Ion Medical Center, Gunma University, Maebashi, Gunma, Japan
| | - Tatsuya Ohno
- Department of Radiation Oncology, Gunma University, Maebashi, Japan
- Gunma University Heavy Ion Medical Center, Gunma University, Maebashi, Gunma, Japan
| | - Yang Li
- Department of Radiation Oncology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Yuan Zhou
- Department of Radiation Oncology, Gunma University, Maebashi, Japan
- Gunma University Heavy Ion Medical Center, Gunma University, Maebashi, Gunma, Japan
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8
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Choi J, Sahoo JK, Hasturk O, Falcucci T, Yao Y, Kaplan DL. Instantaneous Formation of Silk Protein Aerosols and Fibers with a Portable Spray Device Under Ambient Conditions. Adv Mater Technol 2023; 8:2201392. [PMID: 37635855 PMCID: PMC10456984 DOI: 10.1002/admt.202201392] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Indexed: 08/29/2023]
Abstract
A variety of artificial silk spinning approaches have been attempted to mimic the natural spinning process found in silkworms and spiders, yet instantaneous silk fiber formation with hierarchical structure under physiological and ambient conditions without post-treatment procedures remains unaddressed. Here, we report a new strategy to fabricate silk protein-based aerosols and silk fibers instantaneously (< 1 s) in situ using a simple, portable, spray device, avoiding complicated and costly advanced manufacturing techniques. The key to success is the instantaneous conformational transition of silk fibroin from random coil to β-sheet right before spraying by mixing silk and polyethylene glycol (PEG) solutions in the spray device, allowing aerosols and silk fibers to be sprayed in situ, with further control achieved via the molecular weight of silk. The spinning process of the spray device is based on the use of green solvents, i.e., all steps of instant conformational transition of silk fibroin are carried out in aqueous conditions or with buffers at ambient conditions, in combination with shear and elongational flow caused by the hydraulic pressure generated in the spray container. The system supports a portable and user-friendly system that could be used for drug delivery carriers, wound coating materials and rapid silk fiber conformal coatings on surfaces.
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Affiliation(s)
- Jaewon Choi
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA; Department of Polymer Science and Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Jugal Kishore Sahoo
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
| | - Onur Hasturk
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
| | - Thomas Falcucci
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
| | - Ya Yao
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
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Peng G, Gao Q, Dong Z, Liang L, Chen J, Zhu C, Zhang P, Lu L. Surface Cleanliness Maintenance with Laminar Flow Based on the Characteristics of Laser-Induced Sputtering Particles in High-Power Laser Systems. Micromachines (Basel) 2023; 14:598. [PMID: 36985007 PMCID: PMC10051549 DOI: 10.3390/mi14030598] [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: 02/13/2023] [Revised: 02/28/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
In high-power laser systems, the primary cause of contamination of optical components and degradation of spatial cleanliness is laser-induced sputtering of particles. To mitigate this problem, laminar flow is frequently utilized to control the direction and transport of these particles. This study characterizes the properties of laser-induced sputtering particles, including their flying trend, diameter range, and velocity distribution at varying time intervals. A time-resolved imaging method was employed to damage the rear surface of fused silica using a 355 nm Nd: YAG pump laser. The efficacy of laminar flow in controlling these particles was then assessed, with a particular focus on the influence of laminar flow direction, laminar flow velocity, particle flight height, and particle diameter. Our results indicate that the optimal laminar flow velocity for preventing particle invasion is highly dependent on the maximum particle attenuation distance (or safety distance), which can vary by up to two orders of magnitude. Furthermore, a laminar flow velocity of 0.5 m/s can effectively prevent particle sedimentation. Future research will aim to optimize laminar flow systems based on these findings to achieve high surface cleanliness in high-power laser systems with minimal energy consumption.
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Affiliation(s)
- Ge Peng
- Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street, Harbin 150001, China
| | - Qiang Gao
- Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street, Harbin 150001, China
- Chongqing Research Institute of Harbin Institute of Technology, Chongqing 401135, China
| | - Zhe Dong
- Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street, Harbin 150001, China
| | - Lingxi Liang
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, West Dazhi Street, Harbin 150080, China
| | - Jiaxuan Chen
- Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street, Harbin 150001, China
| | - Chengyu Zhu
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, West Dazhi Street, Harbin 150080, China
| | - Peng Zhang
- Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street, Harbin 150001, China
| | - Lihua Lu
- Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, West Dazhi Street, Harbin 150001, China
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Luo Z, Sun L, Bian F, Wang Y, Yu Y, Gu Z, Zhao Y. Erythrocyte-Inspired Functional Materials for Biomedical Applications. Adv Sci (Weinh) 2023; 10:e2206150. [PMID: 36581585 PMCID: PMC9951328 DOI: 10.1002/advs.202206150] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 10/22/2022] [Revised: 12/03/2022] [Indexed: 05/30/2023]
Abstract
Erythrocytes are the most abundant cells in the blood. As the results of long-term natural selection, their specific biconcave discoid morphology and cellular composition are responsible for gaining excellent biological performance. Inspired by the intrinsic features of erythrocytes, various artificial biomaterials emerge and find broad prospects in biomedical applications such as therapeutic delivery, bioimaging, and tissue engineering. Here, a comprehensive review from the fabrication to the applications of erythrocyte-inspired functional materials is given. After summarizing the biomaterials mimicking the biological functions of erythrocytes, the synthesis strategies of particles with erythrocyte-inspired morphologies are presented. The emphasis is on practical biomedical applications of these bioinspired functional materials. The perspectives for the future possibilities of the advanced erythrocyte-inspired biomaterials are also discussed. It is hoped that the summary of existing studies can inspire researchers to develop novel biomaterials; thus, accelerating the progress of these biomaterials toward clinical biomedical applications.
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Affiliation(s)
- Zhiqiang Luo
- Department of Rheumatology and ImmunologyNanjing Drum Tower HospitalSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China
| | - Lingyu Sun
- Department of Rheumatology and ImmunologyNanjing Drum Tower HospitalSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China
| | - Feika Bian
- Department of Rheumatology and ImmunologyNanjing Drum Tower HospitalSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China
| | - Yu Wang
- Department of Rheumatology and ImmunologyNanjing Drum Tower HospitalSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China
| | - Yunru Yu
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health)Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhou325001China
| | - Zhuxiao Gu
- Department of Rheumatology and ImmunologyNanjing Drum Tower HospitalSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China
| | - Yuanjin Zhao
- Department of Rheumatology and ImmunologyNanjing Drum Tower HospitalSchool of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health)Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhou325001China
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11
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Lathers S, Krishnamoorthy M, Vasdev N, Tegan G. Distribution of surgical smoke particles within a simulated laparoscopic cavity utilizing an AirSeal ® system. J Med Eng Technol 2023; 47:12-28. [PMID: 35801978 DOI: 10.1080/03091902.2022.2096134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 03/25/2022] [Accepted: 06/27/2022] [Indexed: 01/11/2023]
Abstract
An exploratory study was performed to determine the distribution of surgical smoke particulate matter (SSPM) and evacuation times within an AirSeal® System and a traditional insufflation access system in various simulated surgical scenarios. Identified trends showed statistical significance when setting the AirSeal® System to Low smoke evacuation that it reduces the percentage of particulate matter at the Access Port opening. Additionally, it was observed that when utilising a laparoscopic tool a similar trend in particle distributions were seen between either insufflation and access system at the opening of the Access Port and trocar. Evacuation times for SSPM removal within the AirSeal® System showed an overall average to ≥95% reduction of 5.64 min within the surgical cavity, 3.69 min at the Access Port opening, and 3.61 min within the smoke evacuation line. The overall average for the traditional insufflation and access system was 9.38 min within the surgical cavity and 6.06 min at the trocar opening. Results showed that when using the traditional system compared to the AirSeal® System, it resulted in a percent change increase in evacuation times of 66.31% within the surgical cavity and 64.23% at the trocar opening.
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Affiliation(s)
- Steven Lathers
- Research and Development, CONMED Corporation, Largo, Florida, USA
| | | | - Nikhil Vasdev
- Department of Urology, Lister Hospital, Hertfordshire and Bedfordshire Urological Cancer Centre, Stevenage, UK
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK
| | - Gary Tegan
- Research and Development, CONMED Corporation, Largo, Florida, USA
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12
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Lin SC, Chang PC, Lin CH, Liang HJ, Huang CH. Particulate Cell Wall Materials of Lactobacillus acidophilus as Vaccine Adjuvant. Vet Sci 2022; 9. [PMID: 36548859 DOI: 10.3390/vetsci9120698] [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: 10/22/2022] [Revised: 12/08/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
We evaluated Lactobacillus acidophilus (LA) for adjuvant application in animal vaccines. LA particles (LAPs) are made by treating LA with purification processes and high-pressure homogenization (HPH). We found that LAPs treated with HPH with trehalose and emulsifiers had an average particle size of 179 nm, considerably smaller than LAPs without additives. First, we evaluated the adjuvanticity of LAPs using a murine model with ovalbumin antigens, revealing that LAPs, especially in a five-fold concentration, could induce a considerable antibody response compared with other current adjuvants. In poultry vaccination tests using inactivated Newcastle disease virus, LAPs alone could induce a similar antibody response compared to commercial water-in-oil (W/O) adjuvant ISA70, a commercial adjuvant, at weeks 4 and 6; however, they declined faster than ISA70 at weeks 8 and 10. LAPs added to conventional adjuvant materials, such as mineral oil-based O/W emulsions, showed similar adjuvanticity to ISA70. LA-H5-C, composed of carbomer, emulsifiers and trehalose showed no significant body weight change in acute toxicity compared to other adjuvants including ISA70, making formulated LAPs a potential candidate for use as a veterinary vaccine adjuvant.
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Wronka A, Beer P, Kowaluk G. Selected Properties of Single and Multi-Layered Particleboards with the Structure Modified by Fibers Implication. Materials (Basel) 2022; 15:8530. [PMID: 36500026 PMCID: PMC9740832 DOI: 10.3390/ma15238530] [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: 10/21/2022] [Revised: 11/26/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
One of the ways of potential improvement of the particleboard properties, especially surface quality, can be the incorporation of wood fibers to face layers. This study aimed to evaluate the selected mechanical and physical parameters of single and multi-layered particleboards with the structure modified by the incorporation of various types and amounts of wood fibers. Single, 3- and 5-layers particleboards were produced with two different types of wood fibers added to the face and core layers. The basic mechanical parameters (modulus of rupture, modulus of elasticity, internal bond, surface soundness), as well as density profile and surface roughness, have been investigated. The results have shown that the single-layer panels with fibers did not meet the standard requirements due to unsatisfactory unstable parameters, probably caused by uneven resination. The remaining panels, 3- and 5-layer, met the standard requirements, and, due to fiber incorporation, there is also potential to reduce the panel density, still meeting standard requirements. The addition of fibers from 0% to 75% in face layers leads to an increase in the modulus of rupture from 10.6 N mm-2 to 15.6 N mm-2. Depending on the fibers' type, the surface soundness can vary between 0.7 N mm-2 and 1.2 N mm-2. Five-layer panels were of similar or even higher parameters, but due to much-complicated technology, it seems unreasonable to develop this type of composite. The novelty of the conducted research is the attempt to modify the structure of particleboards by adding various amounts of two different types of fibers by mixing them with particles or adding them as separate layers and producing panels of different densities.
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14
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Zhang Q, Kuang G, Yu Y, Ding X, Ren H, Sun W, Zhao Y. Hierarchical Micro particles Delivering Oxaliplatin and NLG919 Nanoprodrugs for Local Chemo-immunotherapy. ACS Appl Mater Interfaces 2022; 14:48527-48539. [PMID: 36263713 DOI: 10.1021/acsami.2c16564] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Chemo-immunotherapy shows promising antitumor therapeutic outcomes for many primary cancers. Research in this area has been focusing on developing an ideal formula that enables the potent efficacy of chemo-immunotherapy in combating various cancers with reduced systemic toxicity. Herein, we present novel hierarchical hydrogel microparticles (MDDP) delivering oxaliplatin and NLG919 nanoprodrugs for local chemo-immunotherapy with desired features. The oxaliplatin prodrug and NLG919 were efficiently loaded in the dual-drug polymeric nanoparticles (DDP NPs), which were further encapsulated into a MDDP by using microfluidic technology. When delivered to the tumor site, the DDP NPs will be sustainedly released from the MDDP and retained locally to reduce systemic toxicity. After being endocytosed by cancer cells, the cytotoxic oxaliplatin and NLG919 could be successfully triggered to release from DDP NPs in a chain-shattering manner, leading to the immunogenic cell death (ICD) of tumor cells and the suppression of intratumoral immunosuppressive Tregs, respectively. With the assistance of an immune modulator, the chemotherapeutics-induced ICD could trigger robust systemic antitumor immune responses, presenting superior synergistic antitumor efficacies. Thus, the hierarchical microparticles could substantially inhibit the growth of mouse subcutaneous colorectal tumors, breast tumors, and colorectal tumors with large initial sizes via synergized chemo-immunotherapy, showing great potential in the practical clinical application of oncotherapy.
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Affiliation(s)
- Qingfei Zhang
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
| | - Gaizhen Kuang
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
| | - Yunru Yu
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
| | - Xiaoya Ding
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
| | - Haozhen Ren
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
| | - Weijian Sun
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - Yuanjin Zhao
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325001, China
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15
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Lakshmikanthan A, Angadi S, Malik V, Saxena KK, Prakash C, Dixit S, Mohammed KA. Mechanical and Tribological Properties of Aluminum-Based Metal-Matrix Composites. Materials (Basel) 2022; 15:ma15176111. [PMID: 36079492 PMCID: PMC9458116 DOI: 10.3390/ma15176111] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/27/2022] [Accepted: 08/29/2022] [Indexed: 06/01/2023]
Abstract
This review article focuses on the aluminum-based metal matrix composites (Al-based MMCs). Studies or investigations of their mechanical and tribological properties performed by researchers worldwide in the past are presented in detail. The processing techniques and applications for Al-based MMCs are also documented here. A brief background on the composite materials, their constituents, and their classification, as well as the different matrix materials and particulates used in Al-based MMCs, can be found in this review. Then, an overview of dual-particle-size reinforced composites, heat treatment of Al alloys, and temper designations used in heat treatment are also included. In addition, the factors influencing the mechanical and wear properties of Al-based MMCs are discussed. The primary objective is that both present and future researchers and investigators will be assisted by the comprehensive knowledge compiled in this article to further explore and work towards the betterment of society in general.
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Affiliation(s)
- Avinash Lakshmikanthan
- Department of Mechanical Engineering, Nitte Meenakshi Institute of Technology, Bangalore 560064, India
| | - Santosh Angadi
- Department of Mechanical Engineering, Nitte Meenakshi Institute of Technology, Bangalore 560064, India
| | - Vinayak Malik
- Department of Mechanical Engineering, KLS Gogte Institute of Technology, Belagavi 590008, India
| | - Kuldeep K. Saxena
- Department of Mechanical Engineering, GLA University, Mathura 281406, India
| | - Chandar Prakash
- School of Mechanical Engineering, Lovely Professional University, Phagwara 144001, India
- Division of Research and Development, Lovely Professional University, Phagwara 144001, India
| | - Saurav Dixit
- Peter the Great St. Petersburg Polytechnic University, 195251 Saint Petersburg, Russia
- Division of Research & Innovation, Uttaranchal University, Dehradun 248007, India
| | - Kahtan A. Mohammed
- Department of Medical Physics, Hilla University College, Babylon 51002, Iraq
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16
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Maia FS, Marques MC, Macedo ACD, Matos CC, Rocha MVP. Analysis of gunshot residues from nontoxic ammunition: a contribution to health and environmental analysis. J Environ Sci Health A Tox Hazard Subst Environ Eng 2022; 57:427-435. [PMID: 35535718 DOI: 10.1080/10934529.2022.2072152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 06/14/2023]
Abstract
This study's aim was to determine the presence, as well as to evaluate the health and environmental impacts, of chemical elements from firearm shots during shooter practice at outdoor shooting ranges, both in the environment and on the shooters' hands. Two high-precision devices were used for measuring suspended particles that are released during discharge of Taurus PT 100 .40 caliber pistols. The analysis of collected data allowed the identification of specific distribution patterns of samples that were adsorbed. Moreover, samples were collected from the opisthenar area of the hand to investigate both the occurrence and deposition of particles and chemical elements through scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS). The results indicate that copper, lead, and zinc concentration profiles will be able to delimit and reveal more precise details regarding shots made with nontoxic ammunition (NTA). In particular, the residual graphic analysis indicated that the majority of metal deposited in the shooter's hand is zinc. Further, the metals barium and lead also were detected. Due to the exposure to these elements, it could be concluded that engineering controls and administrative management should be sought in order to avoid human overexposure and environmental release of these airborne toxic metals.
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Affiliation(s)
- Francisco Sílvio Maia
- Institute of Engineering and Sustainable Development, University of International Integration of Afro-Brazilian Lusophony, Acarape, Brazil
| | - Margarida Correia Marques
- School of Life and Environmental Sciences, Department of Biology and Environment; Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, Vila Real, Portugal
| | | | - Carlos Costa Matos
- Chemistry Research Centre (CQ-VR), University of Trás-os-Montes and Alto Douro, Vila Real, Portugal
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17
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Nazaroff WW. Indoor aerosol science aspects of SARS-CoV-2 transmission. Indoor Air 2022; 32:e12970. [PMID: 34873752 DOI: 10.1111/ina.12970] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [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: 07/02/2021] [Revised: 11/17/2021] [Accepted: 11/26/2021] [Indexed: 05/04/2023]
Abstract
Knowledge about person-to-person transmission of SARS-CoV-2 is reviewed, emphasizing three components: emission of virus-containing particles and drops from infectious persons; transport and fate of such emissions indoors; and inhalation of viral particles by susceptible persons. Emissions are usefully clustered into three groups: small particles (diameter 0.1-5 µm), large particles (5-100 µm), and ballistic drops (>100 µm). Speaking generates particles and drops across the size spectrum. Small particles are removed from indoor air at room scale by ventilation, filtration, and deposition; large particles mainly deposit onto indoor surfaces. Proximate exposure enhancements are associated with large particles with contributions from ballistic drops. Masking and social distancing are effective in mitigating transmission from proximate exposures. At room scale, masking, ventilation, and filtration can contribute to limit exposures. Important information gaps prevent a quantitative reconciliation of the high overall global spread of COVID-19 with known transmission pathways. Available information supports several findings with moderate-to-high confidence: transmission occurs predominantly indoors; inhalation of airborne particles (up to 50 µm in diameter) contributes substantially to viral spread; transmission occurs in near proximity and at room scale; speaking is a major source of airborne SARS-CoV-2 virus; and emissions can occur without strong illness symptoms.
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Affiliation(s)
- William W Nazaroff
- Department of Civil and Environmental Engineering, University of California, Berkeley, California, USA
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18
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Du B, Schwartz-Narbonne H, Tandoc M, Heffernan EM, Mack ML, Siegel JA. The impact of emissions from an essential oil diffuser on cognitive performance. Indoor Air 2022; 32:e12919. [PMID: 34709668 DOI: 10.1111/ina.12919] [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] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
Essential oil products are increasingly used in indoor environments and have been found to negatively contribute to indoor air quality. Moreover, the chemicals and fragrances emitted by those products may affect the central nervous system and cognitive function. This study uses a double-blind between-subject design to investigate the cognitive impact of exposure to the emissions from essential oil used in an ultrasonic diffuser. In a simulated office environment where other environmental parameters were maintained constant, 34 female and 25 male university students were randomly allocated into four essential oil exposure scenarios. The first two scenarios contrast lemon oil to pure deionized water, while the latter two focus on different levels of particulate matter differentiated by HEPA filters with non-scented grapeseed oil as the source. Cognitive function was assessed using a computer-based battery consisting of five objective tests that involve reasoning, response inhabitation, memory, risk-taking, and decision-making. Results show that exposure to essential oil emissions caused shortened reaction time at the cost of significantly worse response inhabitation control and memory sensitivity, indicating potentially more impulsive decision-making. The cognitive responses caused by scented lemon oil and non-scented grapeseed oil were similar, as was the perception of odor pleasantness and intensity.
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Affiliation(s)
- Bowen Du
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, ON, Canada
| | | | - Marlie Tandoc
- Department of Psychology, University of Pennsylvania, Philadelphia, PA, USA
| | - Emily M Heffernan
- Department of Psychology, University of Toronto, Toronto, ON, Canada
| | - Michael L Mack
- Department of Psychology, University of Toronto, Toronto, ON, Canada
| | - Jeffrey A Siegel
- Department of Civil and Mineral Engineering, University of Toronto, Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
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19
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Yang L, Sun L, Zhang H, Bian F, Zhao Y. Ice-Inspired Lubricated Drug Delivery Particles from Microfluidic Electrospray for Osteoarthritis Treatment. ACS Nano 2021; 15:20600-20606. [PMID: 34870960 DOI: 10.1021/acsnano.1c09325] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Particle-based drug delivery systems have a demonstrated value in osteoarthritis treatment. Research in this area trends to developing functional particles to improve the therapeutic effects. Herein, inspired by the super lubricated surface of ice that consists of a contiguous and ultrathin layer of bound water, we developed a 2-methylacryloyloxyethyl phosphorylcholine (MPC) decorated methacrylate anhydride- hyaluronic acid (HAMA) drug delivery particle with satisfying strength and enhanced lubrication from microfluidic electrospray for osteoarthritis treatment. Benefiting from the precise control of microfluidic electrospray flows, the generated drug delivery particles are imparted with well-tailored sizes and good dispersion. As the generated HAMA particles were modified by MPC with the positively (N+(CH3)3) and negatively (PO4-) charged chemical groups, they were imparted with enhanced lubrication effect and reduced friction on the joint interface by forming a hydrated lubricating layer. We have demonstrated that the MPC-modified HAMA particles could be employed as microcarriers for loading diclofenac sodium (DS) to inhibit the inflammatory response, thus further enhancing the osteoarthritis therapeutic effect in vivo and in vitro. Thus, the proposed drug delivery particles with satisfactory biocompatibility and therapeutic effect are great potential for clinical applications.
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Affiliation(s)
- Lei Yang
- Department of Rheumatology and Immunology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 210008 Nanjing, China
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
- Oujiang Laboratory, Zhejiang Lab for Regenerative Medicine, Vision and Brain Health, Wenzhou, Zhejiang 325001, China
| | - Lingyu Sun
- Department of Rheumatology and Immunology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 210008 Nanjing, China
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Han Zhang
- Department of Rheumatology and Immunology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 210008 Nanjing, China
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Feika Bian
- Department of Rheumatology and Immunology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 210008 Nanjing, China
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Yuanjin Zhao
- Department of Rheumatology and Immunology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, 210008 Nanjing, China
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
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20
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Wang Y, Wu L, Wang Y. Study on Particle Manipulation in a Metal Internal Channel under Acoustic Levitation. Micromachines (Basel) 2021; 13:18. [PMID: 35056183 PMCID: PMC8778359 DOI: 10.3390/mi13010018] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/17/2021] [Accepted: 12/22/2021] [Indexed: 11/16/2022]
Abstract
In order to study the acoustic levitation and manipulation of micro-particles in the heterogeneous structures inside metal, a test system for internal levitation in three-dimensional space is designed, establishing the 3D motion model of ultrasonic levitation and manipulation of micro-particles. The relationship between levitation force, particle diameter, internal channel size, and transmission thickness is established through the motion manipulation tests of multi-configuration channel levitation micro-particles in components. The results show that the proposed method can realize the following movement of levitation micro-particles at a higher speed and the control of motion accuracy in three-dimensional space. The micro-particles can be reliably suspended and continuously moved inside the components along a predesigned motion trajectory. The results provide an effective and feasible processing scheme for direct processing through the internal spatial structure.
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Affiliation(s)
- Yaxing Wang
- School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China; (L.W.); (Y.W.)
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21
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Liang Z, Meng Q, Yang Q, Chen N, You C. Size-Specific Particulate Matter Associated With Acute Lower Respiratory Infection Outpatient Visits in Children: A Counterfactual Analysis in Guangzhou, China. Front Public Health 2021; 9:789542. [PMID: 34926398 PMCID: PMC8674437 DOI: 10.3389/fpubh.2021.789542] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 11/01/2021] [Indexed: 11/13/2022] Open
Abstract
The burden of lower respiratory infections is primarily evident in the developing countries. However, the association between size-specific particulate matter and acute lower respiratory infection (ALRI) outpatient visits in the developing countries has been less studied. We obtained data on ALRI outpatient visits (N = 105,639) from a tertiary hospital in Guangzhou, China between 2013 and 2019. Over-dispersed generalized additive Poisson models were employed to evaluate the excess risk (ER) associated with the size-specific particulate matter, such as inhalable particulate matter (PM10), coarse particulate matter (PMc), and fine particulate matter (PM2.5). Counterfactual analyses were used to examine the potential percent reduction of ALRI outpatient visits if the levels of air pollution recommended by the WHO were followed. There were 35,310 pneumonia, 68,218 bronchiolitis, and 2,111 asthma outpatient visits included. Each 10 μg/m3 increase of 3-day moving averages of particulate matter was associated with a significant ER (95% CI) of outpatient visits of pneumonia (PM2.5: 3.71% [2.91, 4.52%]; PMc: 9.19% [6.94, 11.49%]; PM10: 4.36% [3.21, 5.52%]), bronchiolitis (PM2.5: 3.21% [2.49, 3.93%]; PMc: 9.13% [7.09, 11.21%]; PM10: 3.12% [2.10, 4.15%]), and asthma (PM2.5: 3.45% [1.18, 5.78%]; PMc: 11.69% [4.45, 19.43%]; PM10: 3.33% [0.26, 6.49%]). The association between particulate matter and pneumonia outpatient visits was more evident in men patients and in the cold seasons. Counterfactual analyses showed that PM2.5 was associated with a larger potential decline of ALRI outpatient visits compared with PMc and PM10 (pneumonia: 11.07%, 95% CI: [7.99, 14.30%]; bronchiolitis: 6.30% [4.17, 8.53%]; asthma: 8.14% [2.65, 14.33%]) if the air pollutants were diminished to the level of the reference guidelines. In conclusion, short-term exposures to PM2.5, PMc, and PM10 are associated with ALRI outpatient visits, and PM2.5 is associated with the highest potential decline in outpatient visits if it could be reduced to the levels recommended by the WHO.
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Affiliation(s)
- Zhenyu Liang
- Department of Pediatrics, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Qiong Meng
- Department of Pediatrics, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Qiaohuan Yang
- Department of Pediatrics, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Na Chen
- Department of Pediatrics, Guangdong Second Provincial General Hospital, Guangzhou, China
| | - Chuming You
- Department of Pediatrics, Guangdong Second Provincial General Hospital, Guangzhou, China
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Abstract
The elementary particles of relativistic quantum field theory are not simple field quanta, as has long been assumed. Rather, they supplement quantum fields, on which they depend on but to which they are not reducible, as shown here with particles defined instead as a unified collection of properties that appear in both physical symmetry group representations and field propagators. This notion of particle provides consistency between the practice of particle physics and its basis in quantum field theory.
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Affiliation(s)
- Gregg Jaeger
- Quantum Communication and Measurement Laboratory, Department of Electrical and Computer Engineering and Division of Natural Science and Mathematics, Boston University, Boston, MA 02215, USA
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23
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Hossain MS, Mahmud M, Sultana S, Bin Mobarak M, Islam MS, Ahmed S. Coupled effect of particle size of the source materials and calcination temperature on the direct synthesis of hydroxyapatite. R Soc Open Sci 2021; 8:210684. [PMID: 34527274 PMCID: PMC8424352 DOI: 10.1098/rsos.210684] [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] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 08/11/2021] [Indexed: 05/05/2023]
Abstract
We report the effect of controlled particle size (obtained by using 80, 100, 120, 140 and 200 mesh) of the source materials on the synthesis of a well-known biomaterial, hydroxyapatite (Hap). In addition to this, we have also mapped the consequence of applied temperature (700°C, 800°C and 900°C) on the crystallographic properties and phase composition of the obtained Hap. Nevertheless, although with Hap, in each case, β-tricalcium phosphate (β-TCP) was registered as the secondary phase the ANOVA test revealed that the results of the crystallographic parameters are significantly different for the applied sintering temperature 700°C and 800°C (p < 0.05), while the data obtained for calcination temperature 800°C are not significantly different from that acquired at 900°C (p > 0.05). Fourier transform infrared spectrophotometer data ensured that, irrespective of mesh size and calcination temperature, the synthesized Hap samples were of carbonated apatite with B-type substitution. Interestingly, for all cases, the % of carbonate content was below the maximum limit (8%) of theCO 3 2 - ion present in bone tissue hydroxyapatite.
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Affiliation(s)
- Md. Sahadat Hossain
- Institute of Glass and Ceramic Research and Testing (IGCRT), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhanmondi, Dhaka-1205, Bangladesh
| | - Monika Mahmud
- Institute of Glass and Ceramic Research and Testing (IGCRT), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhanmondi, Dhaka-1205, Bangladesh
| | - Sazia Sultana
- Institute of Glass and Ceramic Research and Testing (IGCRT), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhanmondi, Dhaka-1205, Bangladesh
| | - Mashrafi Bin Mobarak
- Institute of Glass and Ceramic Research and Testing (IGCRT), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhanmondi, Dhaka-1205, Bangladesh
| | - M. Saiful Islam
- BCSIR Laboratories, Dhaka, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhanmondi, Dhaka-1205, Bangladesh
| | - Samina Ahmed
- Institute of Glass and Ceramic Research and Testing (IGCRT), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhanmondi, Dhaka-1205, Bangladesh
- BCSIR Laboratories, Dhaka, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dr. Qudrat-i-Khuda Road, Dhanmondi, Dhaka-1205, Bangladesh
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Dueck ME, Rafiee A, Mino J, Nair SG, Kamravaei S, Pei L, Quémerais B. Welding Fume Exposure and Health Risk Assessment in a Cohort of Apprentice Welders. Ann Work Expo Health 2021; 65:775-788. [PMID: 33889935 DOI: 10.1093/annweh/wxab016] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 02/03/2021] [Accepted: 02/12/2021] [Indexed: 12/18/2022] Open
Abstract
Welding fumes vary in composition depending on the materials and processes used, and while health outcomes in full-time welders have been widely studied, limited research on apprentices exists. Besides, few data are available for metals such as vanadium and antimony. This study aimed to look at individual metals present in welding fumes in the learning environment of apprentice welders. Forty-three welders and 41 controls were chosen from trade programmes at the Northern Alberta Institute of Technology. Ambient and personal air samples were collected at days 0, 1, 7, and 50 of their training and analysed for mass and metal concentrations using Inductively Coupled Plasma Mass Spectrometry. Results showed increases in particle and metal concentrations as apprentices progressed throughout their education and that concentrations at day 50 were similar to levels found in the literature for professional welders. Variable concentrations indicate that some individuals may not properly use the local exhaust ventilation system. Other possible explanation for variations are the position of the sampler on the shoulder, the time spent welding and in each welding position, and the skills of the welders. Strong relationships were observed between particle and metal concentrations, suggesting that these relationships could be used to estimate metal exposure in welders from particle exposure. Welding processes were the most important determinant of exposure in apprentice welders, with Metal Core Arc Welding producing the largest particle concentrations followed by oxyacetylene cutting, and Gas Metal Arc Welding. Health risk assessment showed that welder apprentices are at risk for overexposure to manganese, which suggests that professional welders should be monitored for manganese as they are exposed more than apprentices. Training in proper positioning of local exhaust ventilation system and proper use of respirators are recommended in training facilities.
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Affiliation(s)
- Meghan E Dueck
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Ata Rafiee
- Department of Medicine, Edmonton, Alberta, Canada
| | - James Mino
- North West Environmental Group Ltd, Victoria, British Columbia, Canada
| | - Sindhu G Nair
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | | | - Lei Pei
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada
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25
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Malouff TD, Combs SE, Trifiletti DM. Editorial: Exploring the Potential of Particle Radiotherapy: Helium, Neutrons, Carbon, and Other Heavy Ions. Front Oncol 2021; 11:740974. [PMID: 34395297 PMCID: PMC8358599 DOI: 10.3389/fonc.2021.740974] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Timothy D Malouff
- Department of Radiation Oncology, Mayo Clinic Florida, Jacksonville, FL, United States
| | - Stephanie E Combs
- Department of Radiation Oncology, Technical University of Munich, Munich, Germany
| | - Daniel M Trifiletti
- Department of Radiation Oncology, Mayo Clinic Florida, Jacksonville, FL, United States
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26
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Liu FX, Cocks ACF, Tarleton E. Dislocation dynamics modelling of the creep behaviour of particle-strengthened materials. Proc Math Phys Eng Sci 2021; 477:20210083. [PMID: 35153563 PMCID: PMC8299550 DOI: 10.1098/rspa.2021.0083] [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: 02/01/2021] [Accepted: 05/20/2021] [Indexed: 11/12/2022] Open
Abstract
Plastic deformation in crystalline materials occurs through dislocation slip and strengthening is achieved with obstacles that hinder the motion of dislocations. At relatively low temperatures, dislocations bypass the particles by Orowan looping, particle shearing, cross-slip or a combination of these mechanisms. At elevated temperatures, atomic diffusivity becomes appreciable, so that dislocations can bypass the particles by climb processes. Climb plays a crucial role in the long-term durability or creep resistance of many structural materials, particularly under extreme conditions of load, temperature and radiation. Here we systematically examine dislocation-particle interaction mechanisms. The analysis is based on three-dimensional discrete dislocation dynamics simulations incorporating impenetrable particles, elastic interactions, dislocation self-climb, cross-slip and glide. The core diffusion dominated dislocation self-climb process is modelled based on a variational principle for the evolution of microstructures, and is coupled with dislocation glide and cross-slip by an adaptive time-stepping scheme to bridge the time scale separation. The stress field caused by particles is implemented based on the particle-matrix mismatch. This model is helpful for understanding the fundamental particle bypass mechanisms and clarifying the effects of dislocation glide, climb and cross-slip on creep deformation.
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Affiliation(s)
- F X Liu
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK
| | - A C F Cocks
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK
| | - E Tarleton
- Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK.,Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK
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27
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Affiliation(s)
- Satoshi Hamada
- Department of Advanced Medicine for Respiratory Failure, Graduate School of Medicine, Kyoto University, Japan
| | - Naoya Tanabe
- Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University, Japan
| | - Toyohiro Hirai
- Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University, Japan
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28
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Kim JS, Lee MH. Effect of filter collection efficiency on the clean air delivery rate in an air cleaner. Indoor Air 2021; 31:745-754. [PMID: 33020961 DOI: 10.1111/ina.12757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 09/17/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
The performance of an air cleaner is evaluated by the clean air delivery rate (CADR), which is defined as the measure of the delivery of contaminant-free air. Herein, we conducted comparative analyses of various particulate air filters with various collection efficiencies. We installed each filter in identical commercial air cleaners to determine the effects of the collection efficiency on the CADR. Three different filters (E11, E12, and H13 classes) were prepared to determine the effects of the filter collection efficiency and pressure drop on the air cleaner performance (ie, the CADR). Based on experimental data, filters E11 and E12 had similar CADRs and flow rates. However, filter H13, which had the highest collection efficiency and the lowest flow rate, had the lowest CADR. This indicates that even if a filter with higher collection efficiency is installed in an air cleaner, the larger pressure drop causes a reduction in the air flow rate. The CADR value is widely distributed for a flow rate range for commercially available models; however, the collection efficiencies for most air cleaners on the market lie in a narrow range. Therefore, the flow rate has the most direct impact on the performance of a commercial air cleaner.
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Affiliation(s)
- Jin Sik Kim
- Educational Environment Assessment Team, Korea Educational Environments Protection Agency, Osong-eup, Heungdeok-gu, Chungbuk, South Korea
| | - Myong-Hwa Lee
- Department of Environmental Engineering, Kangwon National University, Chuncheon-si, Gangwon-do, 24341, South Korea
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29
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Abstract
Polymeric particles with intricate morphologies and properties have been developed based on bioinspired designs for applications in regenerative medicine, tissue engineering, and drug delivery. However, the fabrication of particles with asymmetric functionalities remains a challenge. Janus polymeric particles are an emerging class of material with asymmetric functionalities; however, they are predominantly spherical in morphology, made from non-biocompatible materials, and made using specialized fabrication techniques. We therefore set out to fabricate nonspherical Janus particles inspired by high aspect ratio filamentous bacteriophage using polycaprolactone polymers and standard methods. Janus high aspect ratio particles (J-HARPs) were fabricated with a nanotemplating technique to create branching morphologies selectively at one edge of the particle. J-HARPs were fabricated with maleimide handles and modified with biomolecules such as proteins and biotin. Regioselective modification was observed at the tips of J-HARPs, likely owing to the increased surface area of the branching regions. Biotinylated J-HARPs demonstrated cancer cell biotin receptor targeting, as well as directional crosslinking with spherical particles via biotin-streptavidin interactions. Lastly, maleimide J-HARPs were functionalized during templating to contain amines exclusively at the branching regions and were dual-labeled orthogonally, demonstrating spatially separated bioconjugation. Thus, J-HARPs represent a new class of bioinspired Janus material with excellent regional control over biofunctionalization.
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Affiliation(s)
- Joel A Finbloom
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, 204 Byers Hall, 1700 4 Street, San Francisco, CA 94158 USA
| | - Yiqi Cao
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, 204 Byers Hall, 1700 4 Street, San Francisco, CA 94158 USA
| | - Tejal A Desai
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, 204 Byers Hall, 1700 4 Street, San Francisco, CA 94158 USA
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30
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Abstract
Aerosols are liquid or solid particles suspended in the atmosphere, typically with diameters on the order of nanometers to microns. These particles impact air quality and the radiative balance of the planet. Dry deposition is a key process for the removal of aerosols from the atmosphere and plays an important role in controlling the lifetime of atmospheric aerosols. Dry deposition is driven by turbulence and shows a strong dependence on particle size. This review summarizes the mechanisms behind aerosol dry deposition, including measurement approaches, field observations, and modeling studies. We identify several gaps in the literature, including deposition over the cryosphere (i.e., snow and ice surfaces) and the ocean; in addition, we highlight new techniques to measure black carbon fluxes. While recent advances in aerosol instrumentation have enhanced our understanding of aerosol sources and chemistry, dry deposition and other loss processes remain poorly investigated.
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Affiliation(s)
- Delphine K Farmer
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA;
| | - Erin K Boedicker
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA;
| | - Holly M DeBolt
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA;
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31
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Ma Q, Pollard KM, Brown JM, Italiani P, Moghimi SM. Editorial: Immune Mechanisms in the Pathologic Response to Particles, Fibers, and Nanomaterials. Front Immunol 2021; 12:665810. [PMID: 33815427 PMCID: PMC8017123 DOI: 10.3389/fimmu.2021.665810] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 02/24/2021] [Indexed: 11/22/2022] Open
Affiliation(s)
- Qiang Ma
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV, United States
| | - Kenneth Michael Pollard
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, United States
| | - Jared M Brown
- Skaggs School of Pharmacy, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Paola Italiani
- Institute of Biochemistry and Cell Biology, National Research Council (CNR), Naples, Italy
| | - Seyed Moein Moghimi
- School of Pharmacy, Newcastle University, Newcastle upon Tyne, United Kingdom
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32
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Abdillah A, Sonawane PM, Kim D, Mametov D, Shimodaira S, Park Y, Churchill DG. Discussions of Fluorescence in Selenium Chemistry: Recently Reported Probes, Particles, and a Clearer Biological Knowledge. Molecules 2021; 26:692. [PMID: 33525729 PMCID: PMC7866183 DOI: 10.3390/molecules26030692] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 12/15/2022] Open
Abstract
In this review from literature appearing over about the past 5 years, we focus on selected selenide reports and related chemistry; we aimed for a digestible, relevant, review intended to be usefully interconnected within the realm of fluorescence and selenium chemistry. Tellurium is mentioned where relevant. Topics include selenium in physics and surfaces, nanoscience, sensing and fluorescence, quantum dots and nanoparticles, Au and oxide nanoparticles quantum dot based, coatings and catalyst poisons, thin film, and aspects of solar energy conversion. Chemosensing is covered, whether small molecule or nanoparticle based, relating to metal ion analytes, H2S, as well as analyte sulfane (biothiols-including glutathione). We cover recent reports of probing and fluorescence when they deal with redox biology aspects. Selenium in therapeutics, medicinal chemistry and skeleton cores is covered. Selenium serves as a constituent for some small molecule sensors and probes. Typically, the selenium is part of the reactive, or active site of the probe; in other cases, it is featured as the analyte, either as a reduced or oxidized form of selenium. Free radicals and ROS are also mentioned; aggregation strategies are treated in some places. Also, the relationship between reduced selenium and oxidized selenium is developed.
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Affiliation(s)
- Ariq Abdillah
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (A.A.); (P.M.S.); (D.K.); (D.M.); (S.S.); (Y.P.)
| | - Prasad M. Sonawane
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (A.A.); (P.M.S.); (D.K.); (D.M.); (S.S.); (Y.P.)
| | - Donghyeon Kim
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (A.A.); (P.M.S.); (D.K.); (D.M.); (S.S.); (Y.P.)
| | - Dooronbek Mametov
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (A.A.); (P.M.S.); (D.K.); (D.M.); (S.S.); (Y.P.)
| | - Shingo Shimodaira
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (A.A.); (P.M.S.); (D.K.); (D.M.); (S.S.); (Y.P.)
| | - Yunseon Park
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (A.A.); (P.M.S.); (D.K.); (D.M.); (S.S.); (Y.P.)
| | - David G. Churchill
- Molecular Logic Gate Laboratory, Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; (A.A.); (P.M.S.); (D.K.); (D.M.); (S.S.); (Y.P.)
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
- KAIST Institute for Health Science and Technology (KIHST) (Therapeutic Bioengineering), Daejeon 34141, Korea
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33
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Hall AP, Tepper JS, Boyle MH, Cary MG, Flandre TG, Piaia A, Tarnow I, Macri NP, Freke MC, Nikula KJ, Paul GR, Cauvin A, Gregori M, Haworth R, Naylor S, Price M, Robinson IN, Allen A, Gelzleichter T, Hohlbaum AM, Manetz S, Wolfreys A, Colman K, Fleurance R, Jones D, Mukaratirwa S. BSTP Review of 12 Case Studies Discussing the Challenges, Pathology, Immunogenicity, and Mechanisms of Inhaled Biologics. Toxicol Pathol 2021; 49:235-260. [PMID: 33455525 DOI: 10.1177/0192623320976094] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The inhalation route is a relatively novel drug delivery route for biotherapeutics and, as a result, there is a paucity of published data and experience within the toxicology/pathology community. In recent years, findings arising in toxicology studies with inhaled biologics have provoked concern and regulatory challenges due, in part, to the lack of understanding of the expected pathology, mechanisms, and adversity induced by this mode of delivery. In this manuscript, the authors describe 12 case studies, comprising 18 toxicology studies, using a range of inhaled biotherapeutics (monoclonal antibodies, fragment antigen-binding antibodies, domain antibodies, therapeutic proteins/peptides, and an oligonucleotide) in rodents, nonhuman primates (NHPs), and the rabbit in subacute (1 week) to chronic (26 weeks) toxicology studies. Analysis of the data revealed that many of these molecules were associated with a characteristic pattern of toxicity with high levels of immunogenicity. Microscopic changes in the airways consisted of a predominantly lymphoid perivascular/peribronchiolar (PV/PB) mononuclear inflammatory cell (MIC) infiltrate, whereas changes in the terminal airways/alveoli were characterized by simple ("uncomplicated") increases in macrophages or inflammatory cell infiltrates ranging from mixed inflammatory cell infiltration to inflammation. The PV/PB MIC changes were considered most likely secondary to immunogenicity, whereas simple increases in alveolar macrophages were most likely secondary to clearance mechanisms. Alveolar inflammatory cell infiltrates and inflammation were likely induced by immune modulation or stimulation through pharmacologic effects on target biology or type III hypersensitivity (immune complex disease). Finally, a group of experts provide introductory thoughts regarding the adversity of inhaled biotherapeutics and the basis for reasonable differences of opinion that might arise between toxicologists, pathologists, and regulators.
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Affiliation(s)
| | | | | | | | - Thierry G Flandre
- 98560Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - Alessandro Piaia
- 98560Novartis Institutes for Biomedical Research, Basel, Switzerland
| | | | | | - Mark C Freke
- 70294Charles River Laboratories Montreal ULC, Senneville, Quebec, Canada
| | | | | | | | | | | | - Stuart Naylor
- Charles River Laboratories, Edinburgh, United Kingdom
| | - Mark Price
- 1929GlaxoSmithKline, Ware, United Kingdom
| | | | | | | | | | | | | | - Karyn Colman
- 70089Genomics Institute for the Novartis Research Foundation, San Diego, CA, USA
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34
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Mu Z, Tang R, Liu Z. Construction of Inorganic Bulks through Coalescence of Particle Precursors. Nanomaterials (Basel) 2021; 11:241. [PMID: 33477573 PMCID: PMC7831130 DOI: 10.3390/nano11010241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 12/14/2020] [Revised: 01/09/2021] [Accepted: 01/14/2021] [Indexed: 11/18/2022]
Abstract
Bulk inorganic materials play important roles in human society, and their construction is commonly achieved by the coalescence of inorganic nano- or micro-sized particles. Understanding the coalescence process promotes the elimination of particle interfaces, leading to continuous bulk phases with improved functions. In this review, we mainly focus on the coalescence of ceramic and metal materials for bulk construction. The basic knowledge of coalescent mechanism on inorganic materials is briefly introduced. Then, the properties of the inorganic precursors, which determine the coalescent behaviors of inorganic phases, are discussed from the views of particle interface, size, crystallinity, and orientation. The relationships between fundamental discoveries and industrial applications are emphasized. Based upon the understandings, the applications of inorganic bulk materials produced by the coalescence of their particle precursors are further presented. In conclusion, the challenges of particle coalescence for bulk material construction are presented, and the connection between recent fundamental findings and industrial applications is highlighted, aiming to provide an insightful outlook for the future development of functional inorganic materials.
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Affiliation(s)
- Zhao Mu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China; (Z.M.); (R.T.)
| | - Ruikang Tang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China; (Z.M.); (R.T.)
- State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
| | - Zhaoming Liu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China; (Z.M.); (R.T.)
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35
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González-Portillo LF, Albrecht K, Ho CK. Techno-Economic Optimization of CSP Plants with Free-Falling Particle Receivers. Entropy (Basel) 2021; 23:e23010076. [PMID: 33419200 PMCID: PMC7825578 DOI: 10.3390/e23010076] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 12/11/2020] [Revised: 12/31/2020] [Accepted: 12/31/2020] [Indexed: 11/16/2022]
Abstract
Particle receivers are one of the candidates for the next generation of CSP plants, whose goal is to reduce the levelized cost of electricity (LCOE) to 0.05 $/kWh. This paper presents a techno-economic analysis to study if a CSP system with free-falling particle receiver can achieve this goal. The plant analyzed integrates two ground-based bins to store the excess energy and a supercritical CO2 cycle to generate electricity. The model used for the analysis presents several upgrades to previous particle systems models in order to increase its fidelity, accuracy, and representativeness of an actual system. The main upgrades are the addition of off-design conditions during the annual simulations in all the components and an improved receiver model validated against CFD simulations. The size of the main components is optimized to obtain the system configuration with minimum LCOE. The results show that particle CSP systems can reduce the LCOE to 0.056 $/kWh if the configuration is composed of 1.61 × 106 m2 of heliostats, a 250 m high tower with a 537 m2 falling particle curtain, and 16 h thermal energy storage.
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Affiliation(s)
- Luis F. González-Portillo
- Departamento de Ingeniería Energética, ETSII, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, 28006 Madrid, Spain
- Correspondence:
| | - Kevin Albrecht
- Sandia National Laboratories, Albuquerque, NM 87123, USA; (K.A.); (C.K.H.)
| | - Clifford K. Ho
- Sandia National Laboratories, Albuquerque, NM 87123, USA; (K.A.); (C.K.H.)
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36
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Lehrer EJ, Prabhu AV, Sindhu KK, Lazarev S, Ruiz-Garcia H, Peterson JL, Beltran C, Furutani K, Schlesinger D, Sheehan JP, Trifiletti DM. Proton and Heavy Particle Intracranial Radiosurgery. Biomedicines 2021; 9:31. [PMID: 33401613 PMCID: PMC7823941 DOI: 10.3390/biomedicines9010031] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 12/02/2020] [Revised: 12/23/2020] [Accepted: 12/30/2020] [Indexed: 12/25/2022] Open
Abstract
Stereotactic radiosurgery (SRS) involves the delivery of a highly conformal ablative dose of radiation to both benign and malignant targets. This has traditionally been accomplished in a single fraction; however, fractionated approaches involving five or fewer treatments have been delivered for larger lesions, as well as lesions in close proximity to radiosensitive structures. The clinical utilization of SRS has overwhelmingly involved photon-based sources via dedicated radiosurgery platforms (e.g., Gamma Knife® and Cyberknife®) or specialized linear accelerators. While photon-based methods have been shown to be highly effective, advancements are sought for improved dose precision, treatment duration, and radiobiologic effect, among others, particularly in the setting of repeat irradiation. Particle-based techniques (e.g., protons and carbon ions) may improve many of these shortcomings. Specifically, the presence of a Bragg Peak with particle therapy at target depth allows for marked minimization of distal dose delivery, thus mitigating the risk of toxicity to organs at risk. Carbon ions also exhibit a higher linear energy transfer than photons and protons, allowing for greater relative biological effectiveness. While the data are limited, utilization of proton radiosurgery in the setting of brain metastases has been shown to demonstrate 1-year local control rates >90%, which are comparable to that of photon-based radiosurgery. Prospective studies are needed to further validate the safety and efficacy of this treatment modality. We aim to provide a comprehensive overview of clinical evidence in the use of particle therapy-based radiosurgery.
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Affiliation(s)
- Eric J. Lehrer
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (E.J.L.); (K.K.S.); (S.L.)
| | - Arpan V. Prabhu
- Department of Radiation Oncology, UAMS Winthrop P. Rockefeller Cancer Institute University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA;
| | - Kunal K. Sindhu
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (E.J.L.); (K.K.S.); (S.L.)
| | - Stanislav Lazarev
- Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (E.J.L.); (K.K.S.); (S.L.)
| | - Henry Ruiz-Garcia
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL 32224, USA; (H.R.-G.); (J.L.P.); (C.B.); (K.F.)
| | - Jennifer L. Peterson
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL 32224, USA; (H.R.-G.); (J.L.P.); (C.B.); (K.F.)
| | - Chris Beltran
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL 32224, USA; (H.R.-G.); (J.L.P.); (C.B.); (K.F.)
| | - Keith Furutani
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL 32224, USA; (H.R.-G.); (J.L.P.); (C.B.); (K.F.)
| | - David Schlesinger
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA 22903, USA; (D.S.); (J.P.S.)
| | - Jason P. Sheehan
- Department of Neurological Surgery, University of Virginia, Charlottesville, VA 22903, USA; (D.S.); (J.P.S.)
| | - Daniel M. Trifiletti
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, FL 32224, USA; (H.R.-G.); (J.L.P.); (C.B.); (K.F.)
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Begay J, Sanchez B, Wheeler A, Baldwin F, Lucas S, Herbert G, Ordonez Y, Shuey C, Klaver Z, Harkema JR, Wagner JG, Morishita M, Bleske B, Zychowski KE, Campen MJ. Assessment of particulate matter toxicity and physicochemistry at the Claim 28 uranium mine site in Blue Gap, AZ. J Toxicol Environ Health A 2021; 84:31-48. [PMID: 33050837 PMCID: PMC7726040 DOI: 10.1080/15287394.2020.1830210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Thousands of abandoned uranium mines (AUMs) exist in the western United States. Due to improper remediation, windblown dusts generated from AUMs are of significant community concern. A mobile inhalation lab was sited near an AUM of high community concern ("Claim 28") with three primary objectives: to (1) determine the composition of the regional ambient particulate matter (PM), (2) assess meteorological characteristics (wind speed and direction), and (3) assess immunological and physiological responses of mice after exposures to concentrated ambient PM (or CAPs). C57BL/6 and apolipoprotein E-null (ApoE-/-) mice were exposed to CAPs in AirCARE1 located approximately 1 km to the SW of Claim 28, for 1 or 28 days for 4 hr/day at approximately 80 µg/m3 CAPs. Bronchoalveolar lavage fluid (BALF) analysis revealed a significant influx of neutrophils after a single-day exposure in C57BL/6 mice (average PM2.5 concentration = 68 µg/m3). Lungs from mice exposed for 1 day exhibited modest increases in Tnfa and Tgfb mRNA levels in the CAPs exposure group compared to filtered air (FA). Lungs from mice exposed for 28 days exhibited reduced Tgfb (C57BL/6) and Tnfa (ApoE-/-) mRNA levels. Wind direction was typically moving from SW to NE (away from the community) and, while detectable in all samples, uranium concentrations in the PM2.5 fraction were not markedly different from published-reported values. Overall, exposure to CAPs in the region of the Blue GAP Tachee's Claim-28 uranium mine demonstrated little evidence of overt pulmonary injury or inflammation or ambient air contamination attributed to uranium or vanadium.
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Affiliation(s)
- Jessica Begay
- University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Bethany Sanchez
- University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Abigail Wheeler
- University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | | | - Selita Lucas
- University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Guy Herbert
- University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Yoselin Ordonez
- University of New Mexico College of Pharmacy, Albuquerque, NM, USA
| | - Chris Shuey
- Southwest Research and Information Center, Albuquerque, NM, USA
| | | | | | | | | | - Barry Bleske
- University of New Mexico College of Pharmacy, Albuquerque, NM, USA
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38
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Zuo YY, Uspal WE, Wei T. Airborne Transmission of COVID-19: Aerosol Dispersion, Lung Deposition, and Virus-Receptor Interactions. ACS Nano 2020; 14:16502-16524. [PMID: 33236896 PMCID: PMC7724984 DOI: 10.1021/acsnano.0c08484] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Accepted: 11/19/2020] [Indexed: 05/02/2023]
Abstract
Coronavirus disease 2019 (COVID-19), due to infection by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is now causing a global pandemic. Aerosol transmission of COVID-19, although plausible, has not been confirmed by the World Health Organization (WHO) as a general transmission route. Considering the rapid spread of SARS-CoV-2, especially nosocomial outbreaks and other superspreading events, there is an urgent need to study the possibility of airborne transmission and its impact on the lung, the primary body organ attacked by the virus. Here, we review the complete pathway of airborne transmission of SARS-CoV-2 from aerosol dispersion in air to subsequent biological uptake after inhalation. In particular, we first review the aerodynamic and colloidal mechanisms by which aerosols disperse and transmit in air and deposit onto surfaces. We then review the fundamental mechanisms that govern regional deposition of micro- and nanoparticles in the lung. Focus is given to biophysical interactions between particles and the pulmonary surfactant film, the initial alveolar-capillary barrier and first-line host defense system against inhaled particles and pathogens. Finally, we summarize the current understanding about the structural dynamics of the SARS-CoV-2 spike protein and its interactions with receptors at the atomistic and molecular scales, primarily as revealed by molecular dynamics simulations. This review provides urgent and multidisciplinary knowledge toward understanding the airborne transmission of SARS-CoV-2 and its health impact on the respiratory system.
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Affiliation(s)
- Yi Y. Zuo
- Department of Mechanical Engineering,
University of Hawaii at Manoa,
Honolulu, Hawaii 96822, United States
- Department of Pediatrics, John A.
Burns School of Medicine, University of
Hawaii, Honolulu, Hawaii 96826, United
States
| | - William E. Uspal
- Department of Mechanical Engineering,
University of Hawaii at Manoa,
Honolulu, Hawaii 96822, United States
| | - Tao Wei
- Chemical Engineering Department,
Howard University, Washington, DC
20059, United States
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Kim JY, Kim JH, Kim YD, Seo JH. High Vulnerability of Oligodendrocytes to Oxidative Stress Induced by Ultrafine Urban Particles. Antioxidants (Basel) 2020; 10:antiox10010004. [PMID: 33375107 PMCID: PMC7822157 DOI: 10.3390/antiox10010004] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 11/23/2020] [Revised: 12/14/2020] [Accepted: 12/18/2020] [Indexed: 01/29/2023] Open
Abstract
Oligodendrocytes, myelin-forming cells in the brain, are vulnerable to oxidative stress. Recent work indicates that air pollution causes demyelinating diseases such as multiple sclerosis. However, little is known about the mechanism of toxicity of ultrafine particulate matters (PMs) to oligodendrocytes. Here, we aimed to determine whether oligodendrocyte precursor cells (OPCs) and mature oligodendrocytes (mOLs) are more vulnerable to ultrafine urban PMs (uf-UPs) than other types of brain cells and damage to adult OPCs and mOLs in the mouse brain exposed to uf-UPs. For in vitro experiments, following exposure to various concentrations (2, 20, and 200 μg/mL) of uf-UPs, we measured survival rates, the amount of reactive oxygen species (ROS), and the total antioxidant capacities (TACs) of brain cells isolated from neonatal Sprague-Dawley rats. For animal experiments, after a four-week exposure to a uf-UP suspension (20 μL, 0.4 mg/mL), we enumerated the number of damaged cells and typed damaged cells in the white matter of the cerebellum of uf-UP-exposed mice. MTT assays and Hoechst staining demonstrated that OPCs and mOLs were more vulnerable to uf-UP-induced damage than astrocytes and cortical neurons at 2, 20, and 200 μg/mL of uf-UPs examined in this study (p < 0.05). Damage to OPCs and mOLs depended on uf-UP concentration. DCF assays and DHE staining indicated that the amount of ROS generated in OPCs and mOLs was significantly higher than in other brain cell types (p < 0.05). In contrast, TAC values in OPCs and mOLs were significantly lower than those of other brain cell types (p < 0.05). Fluoro-Jade B (FJB)-positive cells in the cerebellar white matter of the uf-UP-exposed group were significantly greater in number relative to the control group. Double immunofluorescence indicated that FJB-positive cells are NG2-positive adult OPCs and carbon anhydrase II-positive mOLs. Taken together, our findings suggest that oxidative stress induced by uf-UPs in the brain impairs adult OPCs and mOLs, causing demyelination and reducing the capacity for remyelination.
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Affiliation(s)
- Ji Young Kim
- Department of Anatomy, Chungbuk National University College of Medicine, Cheongju 28644, Korea;
| | - Jin-Hee Kim
- Department of Biomedical Laboratory Science, College of Health Science, Cheongju University, Cheongju 28503, Korea;
| | - Yong-Dae Kim
- Department of Preventive Medicine, Chungbuk National University College of Medicine, Cheongju 28644, Korea
- Chungbuk Regional Cancer Center, Chungbuk National University Hospital, Cheongju 28644, Korea
- Correspondence: (Y.-D.K.); (J.H.S.); Tel.: +82-43-261-2845 (Y.-D.K.); +82-43-261-2866 (J.H.S.)
| | - Je Hoon Seo
- Department of Anatomy, Chungbuk National University College of Medicine, Cheongju 28644, Korea;
- Correspondence: (Y.-D.K.); (J.H.S.); Tel.: +82-43-261-2845 (Y.-D.K.); +82-43-261-2866 (J.H.S.)
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Abstract
Studies have shown that a wide range of factors including drugs, chemicals, microbes, and other environmental agents can induce pre-clinical autoimmunity. However, only a few have been confidently linked to autoimmune diseases. Among these are exposures to inhaled particulates that are known to be associated with autoimmune diseases such as lupus and rheumatoid arthritis. In this article, the potential of particle, fiber, and nanomaterial exposures to induce autoimmunity is discussed. It is hypothesized that inhalation of particulate material known to be associated with human autoimmune diseases, such as cigarette smoke and crystalline silica, results in a complex interplay of a number of pathological processes, including, toxicity, oxidative stress, cell and tissue damage, chronic inflammation, post-translational modification of self-antigens, and the formation of lymphoid follicles that provide a milieu for the accumulation of autoreactive B and T cells necessary for the development and persistence of autoimmune responses, leading to disease. Although experimental studies show nanomaterials are capable of inducing several of the above features, there is no evidence that this matures to autoimmune disease. The procession of events hypothesized here provides a foundation from which to pursue experimental studies to determine the potential of other environmental exposures to induce autoimmunity and autoimmune disease.
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Affiliation(s)
- K Michael Pollard
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, United States
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41
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Majoral C, Coates AL, Le Pape A, Vecellio L. Humidified and Heated Cascade Impactor for Aerosol Sizing. Front Bioeng Biotechnol 2020; 8:589782. [PMID: 33282850 PMCID: PMC7691492 DOI: 10.3389/fbioe.2020.589782] [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: 07/31/2020] [Accepted: 10/22/2020] [Indexed: 11/21/2022] Open
Abstract
Aerosol sizing is generally measured at ambient air but human airways have different temperature (37°C) and relative humidity (100%) which can affect particle size in airways and consequently deposition prediction. This work aimed to develop and evaluate a new method using cascade impactor to measure particle size at human physiological temperature and humidity (HPTH) taking into account ambient air conditions. A heated and humidified trachea was built and a cascade impactor was heated to 37°C and humidified inside. Four medical aerosols [jet nebulizer, mesh nebulizer, Presurized Metered Dose Inhaler (pMDI), and Dry Powder Inhaler (DPI)] under ambient conditions and at HPTH were tested. MMAD was lower at HPTH for the two nebulizers; it was similar at ambient conditions and HPTH for pMDI, and the mass of particles smaller than 5 μm decreased for DPI at HPTH (51.9 vs. 82.8 μg/puff). In conclusion, we developed a new method to measure particle size at HPTH affecting deposition prediction with relevance. In vivo studies are required to evaluate the interest of this new model to improve the precision of deposition prediction.
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Affiliation(s)
- Caroline Majoral
- INSERM, Research Center for Respiratory Diseases, Tours, France.,Université de Tours, Tours, France
| | | | - Alain Le Pape
- INSERM, Research Center for Respiratory Diseases, Tours, France.,Université de Tours, Tours, France
| | - Laurent Vecellio
- INSERM, Research Center for Respiratory Diseases, Tours, France.,Université de Tours, Tours, France
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Gaeckle NT, Lee J, Park Y, Kreykes G, Evans MD, Hogan CJ. Aerosol Generation from the Respiratory Tract with Various Modes of Oxygen Delivery. Am J Respir Crit Care Med 2020; 202:1115-1124. [PMID: 32822208 PMCID: PMC7560792 DOI: 10.1164/rccm.202006-2309oc] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 08/21/2020] [Indexed: 12/12/2022] Open
Abstract
Rationale: Aerosol generation with modes of oxygen therapy such as high-flow nasal cannula and noninvasive positive-pressure ventilation is a concern for healthcare workers during the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic. The amount of aerosol generation from the respiratory tract with these various oxygen modalities is unknown.Objectives: To measure the size and number concentration of particles and droplets generated from the respiratory tract of humans exposed to various oxygen delivery modalities.Methods: Ten healthy participants with no active pulmonary disease were enrolled. Oxygen modalities tested included nonhumidified nasal cannula, face mask, heated and humidified high-flow nasal cannula, and noninvasive positive-pressure ventilation. Aerosol generation was measured with each oxygen mode while participants performed maneuvers of normal breathing, talking, deep breathing, and coughing. Testing was conducted in a negative-pressure room. Particles with a diameter between 0.37 and 20 μm were measured using an aerodynamic particle spectrometer.Measurements and Main Results: Median particle concentration ranged from 0.041 to 0.168 particles/cm3. Median diameter ranged from 1.01 to 1.53 μm. Cough significantly increased the number of particles measured. Measured aerosol concentration did not significantly increase with the use of either humidified high-flow nasal cannula or noninvasive positive-pressure ventilation. This was the case during normal breathing, talking, deep breathing, and coughing.Conclusions: Oxygen delivery modalities of humidified high-flow nasal cannula and noninvasive positive-pressure ventilation do not increase aerosol generation from the respiratory tract in healthy human participants with no active pulmonary disease measured in a negative-pressure room.
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Affiliation(s)
- Nathaniel T. Gaeckle
- Division of Pulmonary, Allergy, Critical Care, and Sleep, Department of Medicine
| | | | | | - Gean Kreykes
- Department of Respiratory Care, M Health Fairview, Minneapolis, Minnesota
| | - Michael D. Evans
- Clinical and Translational Science Institute, University of Minnesota, Minneapolis, Minnesota; and
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43
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Gliga AR, Taj T, Wahlberg K, Lundh T, Assarsson E, Hedmer M, Albin M, Broberg K. Exposure to Mild Steel Welding and Changes in Serum Proteins With Putative Neurological Function-A Longitudinal Study. Front Public Health 2020; 8:422. [PMID: 32984236 PMCID: PMC7485227 DOI: 10.3389/fpubh.2020.00422] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 07/13/2020] [Indexed: 12/20/2022] Open
Abstract
Welders are exposed to high levels of metal particles, consisting mainly of iron and manganese (Mn) oxide. Metal particles, especially those containing Mn can be neurotoxic. In this exploratory study, we evaluated associations between welding and expression of 87 putative neurology-related proteins in serum in a longitudinal approach. The study cohort from southern Sweden included welders working with mild steel (n = 56) and controls (n = 67), all male and non-smoking, which were sampled at two timepoints (T1, T2) 6-year apart. Observed associations in the longitudinal analysis (linear mixed models) were further evaluated (linear regression models) in another cross-sectional sample which included welders (n = 102) and controls (n = 89) who were sampled only once (T1 or T2). The median respirable dust levels for welders after adjusting for respiratory protection was at T1 0.6 (5–95 percentile: 0.2–4.2) and at T2 0.5 (0.1–1.8) mg/m3. The adjusted median respirable Mn concentration was at T2 0.049 mg/m3 (0.003–0.314) with a Spearman correlation between adjusted respirable dust and respirable Mn of rS = 0.88. We identified five neurology-related proteins that were differentially expressed in welders vs. controls in the longitudinal sample, of which one (nicotinamide/nicotinic acid mononucleotide adenylyltransferase 1; NMNAT1) was also differentially expressed in the cross-sectional sample. NMNAT1, an axon-protective protein linked to Alzheimers disease, was upregulated in welders compared with controls but no associations were discerned with degree of exposure (welders only: years welding, respirable dust, cumulative exposure). However, we identified five additional proteins that were associated with years welding (GCSF, EFNA4, CTSS, CLM6, VWC2; welders only) both in the longitudinal and in the cross-sectional samples. We also observed several neurology-related proteins that were associated with age and BMI. Our study indicates that low-to-moderate exposure to welding fumes is associated with changes in circulating levels of neurology-related proteins.
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Affiliation(s)
- Anda R Gliga
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Tahir Taj
- Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Karin Wahlberg
- Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Thomas Lundh
- Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Eva Assarsson
- Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Maria Hedmer
- Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Maria Albin
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Karin Broberg
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
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Padukudru Anand M, Larsson K, Johanson G, Phuleria HC, Ravindra PV, Ernstgård L, Mabalirajan U, Krishna M, Palmberg L, Pollitt KJG, Upadhyay S, Ganguly K. Clinical, Epidemiological and Experimental Approaches to Assess Adverse Health Outcomes of Indoor Biomass Smoke Exposure: Conclusions from An Indo-Swedish Workshop in Mysuru, January 2020. Toxics 2020; 8:E68. [PMID: 32899560 DOI: 10.3390/toxics8030068] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 08/31/2020] [Accepted: 09/03/2020] [Indexed: 12/14/2022]
Abstract
This report summarizes the outcome of a workshop held in Mysuru, India in January 2020 addressing the adverse health effects of exposure to biomass smoke (BMS). The aim of the workshop was to identify uncertainties and gaps in knowledge and possible methods to address them in the Mysuru study on Determinants of Health in Rural Adults (MUDHRA) cohort. Specific aims were to discuss the possibility to improve and introduce new screening methods for exposure and effect, logistic limitations and other potential obstacles, and plausible strategies to overcome these in future studies. Field visits were included in the workshop prior to discussing these issues. The workshop concluded that multi-disciplinary approaches to perform: (a) indoor and personalized exposure assessment; (b) clinical and epidemiological field studies among children, adolescents, and adults; (c) controlled exposure experiments using physiologically relevant in vitro and in vivo models to understand molecular patho-mechanisms are warranted to dissect BMS-induced adverse health effects. It was perceived that assessment of dietary exposure (like phytochemical index) may serve as an important indicator for understanding potential protective mechanisms. Well trained field teams and close collaboration with the participating hospital were identified as the key requirements to successfully carry out the study objectives.
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45
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Takeuchi H. [ Particle Design Strategies for Developing Patient Centric Dosage Form Preparations]. YAKUGAKU ZASSHI 2020; 140:1013-1024. [PMID: 32741859 DOI: 10.1248/yakushi.20-00011] [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] [Indexed: 11/22/2022]
Abstract
Novel dosage form designs aiming at patient centric drug therapy are summarized here based on my carrier research in this field. The common key word for this research is particle design. The topics will be divided into two parts, based on the type of particle: coarse particles (powder) and colloidal particles. The former includes the preparation and characterization of functional particles prepared using a spray dryer. Solid dispersions, solvent deposition particles and dry emulsion systems are described. Polymer coated liposomes are described as a useful drug delivery carrier in several administration routes. As chitosan, a mucoadhesive polymer, was used as a coating polymer, the resultant chitosan-coated liposome was found to work as a good carrier for peptide drugs such as insulin and calcitonin in the gastrointestinal tract after oral administration. In another administration route (inhalation), polymer-coated liposomes enhanced the absorption of the drugs. Liposomal carriers applied to the surface of the eye as eye drops are able to deliver drugs to the posterior part of the eye, such as the retina. As a typical example of patient centric dosage form design, particle designs for the preparation of orally disintegrating tablets and films were introduced in one of our recent studies on oral dosage form design.
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Affiliation(s)
- Hirofumi Takeuchi
- Laboratory of Pharmaceutical Engineering, Gifu Pharmaceutical University
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46
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Abstract
Polarization of immune cells is commonly observed in host responses associated with microbial immunity, inflammation, tumorigenesis, and tissue repair and fibrosis. In this process, immune cells adopt distinct programs and perform specialized functions in response to specific signals. Accumulating evidence indicates that inhalation of micro- and nano-sized particulates activates barrier immune programs in the lung in a time- and context-dependent manner, including type 1 and type 2 inflammation, and T helper (Th) 17 cell, regulatory T cell (Treg), innate lymphoid cell (ILC), and myeloid-derived suppressor cell (MDSC) responses, which highlight the polarization of several major immune cell types. These responses facilitate the pulmonary clearance and repair under physiological conditions. When exposure persists and overwhelms the clearance capacity, they foster the chronic progression of inflammation and development of progressive disease conditions, such as fibrosis and cancer. The pulmonary response to insoluble particulates thus represents a distinctive disease process wherein non-infectious, persistent exposures stimulate the polarization of immune cells to orchestrate dynamic inflammatory and immune reactions, leading to pulmonary and pleural chronic inflammation, fibrosis, and malignancy. Despite large variations in particles and their associated disease outcomes, the early response to inhaled particles often follows a common path. The initial reactions entail a barrier immune response dominated by type 1 inflammation that features active phagocytosis by M1 macrophages and recruitment of neutrophils, both of which are fueled by Th1 and proinflammatory cytokines. Acute inflammation is immediately followed by resolution and tissue repair mediated through specialized pro-resolving mediators (SPMs) and type 2 cytokines and cells including M2 macrophages and Th2 lymphocytes. As many particles and fibers cannot be digested by phagocytes, resolution is often extended and incomplete, and type 2 inflammation becomes heightened, which promotes interstitial fibrosis, granuloma formation, and tumorigenesis. Recent studies also reveal the involvement of Th17-, Treg-, ILC-, and MDSC-mediated responses in the pathogenesis caused by inhaled particulates. This review synopsizes the progress in understanding the interplay between inhaled particles and the pulmonary immune functions in disease pathogenesis, with focus on particle-induced polarization of immune cells and its role in the development of chronic inflammation, fibrosis, and cancer in the lung.
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Affiliation(s)
- Qiang Ma
- Receptor Biology Laboratory, Toxicology and Molecular Biology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, United States
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Abstract
The Ultrasonic Personal Aerosol Sampler (UPAS) is a small, lightweight, and quiet sampler that collects airborne particulate matter on a filter for gravimetric or compositional analysis. The objective of this work was to develop UPAS inlets with collection efficiencies that match criteria for respirable or thoracic mass sampling. The two-stage inlet for respirable mass described here utilizes an impaction stage and a cyclone, whereas the one-stage inlet for thoracic mass sampling utilizes a circular slot impactor. Inlet designs are based on particle collection theory used in conjunction with an optimization algorithm to predict initial inlet dimensions; these predictions were the starting points for experiments that finalized dimensions and operating conditions. Both the respirable mass inlet and the thoracic mass inlet described here are interchangeable with the UPAS, and both have efficiencies that match well with their respective standards. With either inlet, the collected sample should be within ±5% of what the standard specifies for aerosols with reasonably broad size distributions.
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Affiliation(s)
- David Leith
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Christian L'Orange
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado
| | - John Mehaffy
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado
| | - John Volckens
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado
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48
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Brostrøm A, Kling KI, Hougaard KS, Mølhave K. Analysis of Electron Transparent Beam-Sensitive Samples Using Scanning Electron Microscopy Coupled With Energy-Dispersive X-ray Spectroscopy. Microsc Microanal 2020; 26:373-386. [PMID: 32475372 DOI: 10.1017/s1431927620001464] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Scanning electron microscopy, coupled with energy-dispersive X-ray spectroscopy (EDS), is a powerful tool used in many scientific fields. It can provide nanoscale images, allowing size and morphology measurements, as well as provide information on the spatial distribution of elements in a sample. This study compares the capabilities of a traditional EDS detector with a recently developed annular EDS detector when analyzing electron transparent and beam-sensitive NaCl particles on a TEM grid. The optimal settings for single particle analysis are identified in order to minimize beam damage and optimize sample throughput via the choice of acceleration voltage, EDS acquisition time, and quantification model. Here, a linear combination of two models is used to bridge results for particle sizes, which are neither bulk nor sufficiently thin to assume electron transparent. Additionally, we show that the increased count rate obtainable with the annular detector enables mapping as a viable analysis strategy compared with feature detection methods, which only scan segmented regions. Finally, we discuss advantages and disadvantages of the two analysis strategies.
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Affiliation(s)
- Anders Brostrøm
- Technical University of Denmark, DTU Nanolab - National Centre for Nano Fabrication and Characterization, Fysikvej, Building 307, Kgs Lyngby2800, Denmark
- National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen2100, Denmark
| | - Kirsten Inga Kling
- Technical University of Denmark, DTU Nanolab - National Centre for Nano Fabrication and Characterization, Fysikvej, Building 307, Kgs Lyngby2800, Denmark
- SAXOCON A/S, Bredevej 2D, Virum2830, Denmark
| | - Karin Sørig Hougaard
- National Research Centre for the Working Environment, Lersø Parkallé 105, Copenhagen2100, Denmark
| | - Kristian Mølhave
- Technical University of Denmark, DTU Nanolab - National Centre for Nano Fabrication and Characterization, Fysikvej, Building 307, Kgs Lyngby2800, Denmark
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49
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McDonald LT, Christopher SJ, Morton SL, LaRue AC. Physical and elemental analysis of Middle East sands from recent combat zones. Inhal Toxicol 2020; 32:189-199. [PMID: 32448007 DOI: 10.1080/08958378.2020.1766602] [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] [Indexed: 10/24/2022]
Abstract
Objective: The lungs are uniquely exposed to the external environment. Sand and dust exposures in desert regions are common among deployed soldiers. A significant number of Veterans deployed to the Middle East report development of respiratory disorders and diseases.Materials and methods: Sand collected from Fallujah, Iraq and Kandahar, Afghanistan combat zones was analyzed and compared to a sand sample collected from an historic United States (U.S.) battle region (Fort Johnson, James Island, SC, Civil War battle site). Sand samples were analyzed to determine the physical and elemental characteristics that may have the potential to contribute to development of respiratory disease.Results: Using complementary scanning electron microscopy (SEM) imaging and analysis, and inductively coupled plasma mass spectrometry (ICP-MS), it was determined that Iraq sand contained elevated levels of calcium and first row transition metals versus Afghanistan and U.S. sand. Iraq sand particle texture was smooth and round, and particles were considerably smaller than Afghanistan sand. Afghanistan sand was elevated in rare earth metals versus Iraq or U.S. sands and had sharp edge features and larger particle size than Iraq sand.Conclusions: These data demonstrate significant differences in Iraq and Afghanistan sand particle size and characteristics. Middle East sands contained elevated levels of elements that have been associated with respiratory disease versus control site sand, suggesting the potential of sand/dust storm exposure to promote adverse respiratory symptoms. Data also demonstrate the potential for variation based on geographical region or site of exposure. The data generated provide baseline information that will be valuable in designing future exposure studies.
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Affiliation(s)
- Lindsay T McDonald
- Research Services, Ralph H. Johnson VA Medical Center, Charleston, SC, USA.,Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Steven J Christopher
- Inorganic Measurement Science Group, National Institute of Standards and Technology, Charleston, SC, USA
| | - Steve L Morton
- Stressor Detection and Impacts Division, National Centers for Coastal Ocean Science, NOAA National Ocean Service, Charleston, SC, USA
| | - Amanda C LaRue
- Research Services, Ralph H. Johnson VA Medical Center, Charleston, SC, USA.,Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, USA
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Kobayashi S, Kondoh J. Feasibility Study on Shear Horizontal Surface Acoustic Wave Sensors for Engine Oil Evaluation. Sensors (Basel) 2020; 20:E2184. [PMID: 32290628 DOI: 10.3390/s20082184] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/08/2020] [Accepted: 04/11/2020] [Indexed: 11/16/2022]
Abstract
On site monitoring of engine oil is required. The features of a shear horizontal surface acoustic wave (SH-SAW) sensor include simultaneous detection of mechanical and electrical properties of liquids (such as viscosity, relative permittivity, and conductivity) and loaded mass on the sensor surface. In this paper, the used engine oil extracted from a motorbike was measured using the SH-SAW sensor. The degradation factors of the used engine oil were experimentally discussed. Especially, the influences of the particles in the engine oil, heating effect, and water contained in the engine oil were considered by comparing the differences between new and used engine oils. The results indicate that the influence of the water contained in the engine oil is the primary cause of the degradation of the used engine oil.
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