Equations that can predict worsted fabrics’ properties such as bending, shearing, compression, surface and tension, were achieved by means of theoretical and experimental studies. By combining these equations with Ka...Equations that can predict worsted fabrics’ properties such as bending, shearing, compression, surface and tension, were achieved by means of theoretical and experimental studies. By combining these equations with Kawabata’s hand and silhouette evaluation methods, a software system was established. Then the mechanical properties, hand and silhouette of a fabric can be predicted quickly and accurately in terms of fiber configurations, yarn and fabric structures. The predictive result if unsatisfied can be revised by the function of “Help for designing modification”.展开更多
Coronavirus disease 2019(COVID-19), caused by severe acute respiratory syndrome coronavirus 2(SARSCo V-2), has become a global pandemic. Clinical evidence suggests that the intestine is another high-risk organ for SAR...Coronavirus disease 2019(COVID-19), caused by severe acute respiratory syndrome coronavirus 2(SARSCo V-2), has become a global pandemic. Clinical evidence suggests that the intestine is another high-risk organ for SARS-Co V-2 infection besides the lungs. However, a model that can accurately reflect the response of the human intestine to the virus is still lacking. Here, we created an intestinal infection model on a chip that allows the recapitulation of human relevant intestinal pathophysiology induced by SARSCo V-2 at organ level. This microengineered gut-on-chip reconstitutes the key features of the intestinal epithelium-vascular endothelium barrier through the three-dimensional(3 D) co-culture of human intestinal epithelial, mucin-secreting, and vascular endothelial cells under physiological fluid flow. The intestinal epithelium showed permissiveness for viral infection and obvious morphological changes with injury of intestinal villi, dispersed distribution of mucus-secreting cells, and reduced expression of tight junction(E-cadherin), indicating the destruction of the intestinal barrier integrity caused by virus.Moreover, the vascular endothelium exhibited abnormal cell morphology, with disrupted adherent junctions. Transcriptional analysis revealed abnormal RNA and protein metabolism, as well as activated immune responses in both epithelial and endothelial cells after viral infection(e.g., upregulated cytokine genes), which may contribute to the injury of the intestinal barrier associated with gastrointestinal symptoms. This human organ system can partially mirror intestinal barrier injury and the human response to viral infection, which is not possible in existing in vitro culture models. It provides a unique and rapid platform to accelerate COVID-19 research and develop novel therapies.展开更多
文摘Equations that can predict worsted fabrics’ properties such as bending, shearing, compression, surface and tension, were achieved by means of theoretical and experimental studies. By combining these equations with Kawabata’s hand and silhouette evaluation methods, a software system was established. Then the mechanical properties, hand and silhouette of a fabric can be predicted quickly and accurately in terms of fiber configurations, yarn and fabric structures. The predictive result if unsatisfied can be revised by the function of “Help for designing modification”.
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB29050301,XDB32030200,and XDA16020900)the National Key R&D Program of China(2017YFB0405404)+6 种基金the National Science and Technology Major Project(2018ZX09201017-001-001)Yunnan Key Research and Development Program(202003AD150009)the National Natural Science Foundation of China(31671038,31971373,8170347081803492)China Postdoctoral Science Foundation(2019M660065)Innovation Program of Science and Research from the Dalian Institute of Chemical PhysicsChinese Academy of Sciences(DICP I201934)。
文摘Coronavirus disease 2019(COVID-19), caused by severe acute respiratory syndrome coronavirus 2(SARSCo V-2), has become a global pandemic. Clinical evidence suggests that the intestine is another high-risk organ for SARS-Co V-2 infection besides the lungs. However, a model that can accurately reflect the response of the human intestine to the virus is still lacking. Here, we created an intestinal infection model on a chip that allows the recapitulation of human relevant intestinal pathophysiology induced by SARSCo V-2 at organ level. This microengineered gut-on-chip reconstitutes the key features of the intestinal epithelium-vascular endothelium barrier through the three-dimensional(3 D) co-culture of human intestinal epithelial, mucin-secreting, and vascular endothelial cells under physiological fluid flow. The intestinal epithelium showed permissiveness for viral infection and obvious morphological changes with injury of intestinal villi, dispersed distribution of mucus-secreting cells, and reduced expression of tight junction(E-cadherin), indicating the destruction of the intestinal barrier integrity caused by virus.Moreover, the vascular endothelium exhibited abnormal cell morphology, with disrupted adherent junctions. Transcriptional analysis revealed abnormal RNA and protein metabolism, as well as activated immune responses in both epithelial and endothelial cells after viral infection(e.g., upregulated cytokine genes), which may contribute to the injury of the intestinal barrier associated with gastrointestinal symptoms. This human organ system can partially mirror intestinal barrier injury and the human response to viral infection, which is not possible in existing in vitro culture models. It provides a unique and rapid platform to accelerate COVID-19 research and develop novel therapies.
