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Experimental Study on the Characterization of Orientation of Polyester Short Fibers in Rubber Composites by an X-ray Three-Dimensional Microscope. MATERIALS 2022; 15:ma15103726. [PMID: 35629752 PMCID: PMC9147132 DOI: 10.3390/ma15103726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/02/2022] [Accepted: 05/03/2022] [Indexed: 11/17/2022]
Abstract
Polyester-short-fiber-reinforced rubber composites have been detected by an X-ray three-dimensional microscope, and then the three-dimensional reconstruction of the image has been carried out to characterize the orientation of polyester short fibers in the composites for the first time. Based on the summary of three traditional methods and mechanisms of characterizing the orientation of polyester short fibers by the numerical parameter method, the direct test method, and the indirect test method, the method and mechanism of the X-ray three-dimensional microscope applied to the orientation characterization of polyester short fibers have been studied. The combination of the center point and threshold segmentation methods has been used to distinguish which fiber section belongs to the same fiber, and the identification of the whole short fiber in different slice images has been realized for the first time. Moreover, Avizo software has been used to realize the three-dimensional reconstruction of a polyester short fiber scanning image. The obtained data have been integrated and the orientation angle and orientation degree have been quantitatively characterized for the first time. This has filled the key technical problem of quantitative characterization of the orientation angle and orientation degree of polyester fibers. The image has been verified by 3Dmed software, and furthermore, the accuracy of the three-dimensional reconstruction results has been verified.
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Wang L, Li C, Li J, Zhang X, Li X, Cui Y, Xia Y, Zhang Y, Mao S, Ji Y, Sheng W, Han X. Liquid-phase scanning electron microscopy for single membrane protein imaging. Biochem Biophys Res Commun 2022; 590:163-168. [PMID: 34979317 DOI: 10.1016/j.bbrc.2021.12.081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 12/22/2021] [Indexed: 11/02/2022]
Abstract
Liquid-phase electron microscopy is highly desirable for observing biological samples in their native liquid state at high resolution. We developed liquid imaging approaches for biological cells using scanning electron microscopy. Novel approaches included scanning transmission electron imaging using a liquid-cell apparatus (LC-STEM), as well as correlative cathodoluminescence and electron microscopy (CCLEM) imaging. LC-STEM enabled imaging at a ∼2 nm resolution and excellent contrast for the precise recognition of localization, distribution, and configuration of individually labeled membrane proteins on the native cells in solution. CCLEM improved the resolution of fluorescent images down to 10 nm. Liquid SEM technologies will bring unique and wide applications to the study of the structure and function of cells and membrane proteins in their near-native states at the monomolecular level.
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Affiliation(s)
- Li Wang
- Beijing Key Laboratory of Microstructure and Property of Solids, Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Changshuo Li
- Beijing Key Laboratory of Microstructure and Property of Solids, Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Jintao Li
- Beijing Key Laboratory of Environmental and Viral Oncology, Beijing International Science and Technology, Cooperation Base of Antivirus Drug, College of Life Science and Bioengineering, Beijing University of Technology, Beijing, 100124, China
| | - Xiaofei Zhang
- Beijing Key Laboratory of Microstructure and Property of Solids, Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Xiaochen Li
- Beijing Key Laboratory of Microstructure and Property of Solids, Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Yiran Cui
- Beijing Key Laboratory of Microstructure and Property of Solids, Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Yang Xia
- Beijing Key Laboratory of Environmental and Viral Oncology, Beijing International Science and Technology, Cooperation Base of Antivirus Drug, College of Life Science and Bioengineering, Beijing University of Technology, Beijing, 100124, China
| | - Yinqi Zhang
- Beijing Key Laboratory of Microstructure and Property of Solids, Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Shengcheng Mao
- Beijing Key Laboratory of Microstructure and Property of Solids, Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
| | - Yuan Ji
- Beijing Key Laboratory of Microstructure and Property of Solids, Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China.
| | - Wang Sheng
- Beijing Key Laboratory of Environmental and Viral Oncology, Beijing International Science and Technology, Cooperation Base of Antivirus Drug, College of Life Science and Bioengineering, Beijing University of Technology, Beijing, 100124, China.
| | - Xiaodong Han
- Beijing Key Laboratory of Microstructure and Property of Solids, Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China.
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