Objective: In the acid-fast staining experiment of pathological tissues, sulfuric acid and hydrochloric acid were used to evaluate the staining results, so as to get the best staining method. Methods: Using sulfuric a...Objective: In the acid-fast staining experiment of pathological tissues, sulfuric acid and hydrochloric acid were used to evaluate the staining results, so as to get the best staining method. Methods: Using sulfuric acid differentiation solution and hydrochloric acid differentiation solution, the paraffin blocks of pathological tissues known to contain Mycobacterium tuberculosis were compared to evaluate the staining effect. Results: When 0.5% hydrochloric acid differentiation solution is used and the differentiation time is 6 s, the dyeing effect is better than that of sulfuric acid differentiation solution.展开更多
Antimicrobial packaging films are an effective means to avoid food infections.PVA has good film-forming and mechanical properties,but its water resistance and antimicrobial properties are insufficient.In this study,a ...Antimicrobial packaging films are an effective means to avoid food infections.PVA has good film-forming and mechanical properties,but its water resistance and antimicrobial properties are insufficient.In this study,a rod-shaped Ag-MOF with photocatalytic properties was synthesized as an antimicrobial agent by a hydrothermal method using citrate esterified PVA as a film-forming substrate.The MICs of Ag-MOF against Escherichia coli and Staphylococcus aureus were 16μg/mL and 32μg/mL,respectively,and it had good biocompatibility.Under blue light irradiation,Ag-MOF induced the production of ROS,which increased the inhibition rate by more than 83.78%.The antimicrobial mechanism experiments showed that it caused irreversible damage to the bacterial cell membrane through the synergistic effect of Ag^(+)and ROS.The best mechanical properties of the films were obtained at 3%citric acid content,with the water vapor transmission rate,water solubility and swelling rate reduced by 0.19 g⋅mm⋅m^(-2)⋅h^(-1)⋅kPa^(-1),65.33%and 11.26%,respectively.The antimicrobial rate of the com-posite film could reach more than 98%by adding only 1 MIC of Ag-MOF.In conclusion,photocatalytic anti-microbial agents have great potential for application in food packaging.展开更多
The consumer demand for emerging technologies such as augmented reality(AR),autopilot,and three-dimensional(3D)internet has rapidly promoted the application of novel optical display devices in innovative industries.Ho...The consumer demand for emerging technologies such as augmented reality(AR),autopilot,and three-dimensional(3D)internet has rapidly promoted the application of novel optical display devices in innovative industries.However,the micro/nanomanufacturing of high-resolution optical display devices is the primary issue restricting their development.The manufacturing technology of micro/nanostructures,methods of display mechanisms,display materials,and mass production of display devices are major technical obstacles.To comprehensively understand the latest state-of-the-art and trigger new technological breakthroughs,this study reviews the recent research progress of master molds produced using nanoimprint technology for new optical devices,particularly AR glasses,new-generation light-emitting diode car lighting,and naked-eye 3D display mechanisms,and their manufacturing techniques of master molds.The focus is on the relationships among the manufacturing process,microstructure,and display of a new optical device.Nanoimprint master molds are reviewed for the manufacturing and application of new optical devices,and the challenges and prospects of the new optical device diffraction grating nanoimprint technology are discussed.展开更多
文摘Objective: In the acid-fast staining experiment of pathological tissues, sulfuric acid and hydrochloric acid were used to evaluate the staining results, so as to get the best staining method. Methods: Using sulfuric acid differentiation solution and hydrochloric acid differentiation solution, the paraffin blocks of pathological tissues known to contain Mycobacterium tuberculosis were compared to evaluate the staining effect. Results: When 0.5% hydrochloric acid differentiation solution is used and the differentiation time is 6 s, the dyeing effect is better than that of sulfuric acid differentiation solution.
基金supported by the National Natural Science Foundation of China(31700689)Natural Science Foundation of Shanxi Province(202203021221093)+2 种基金Key Technology Research and Development Plan of Jinzhong City in Shanxi(Y201022)Research Project Supported by Shanxi Scholarship Council of China(2024-055)Liuweizhai Food Research Institute(213020310-J).
文摘Antimicrobial packaging films are an effective means to avoid food infections.PVA has good film-forming and mechanical properties,but its water resistance and antimicrobial properties are insufficient.In this study,a rod-shaped Ag-MOF with photocatalytic properties was synthesized as an antimicrobial agent by a hydrothermal method using citrate esterified PVA as a film-forming substrate.The MICs of Ag-MOF against Escherichia coli and Staphylococcus aureus were 16μg/mL and 32μg/mL,respectively,and it had good biocompatibility.Under blue light irradiation,Ag-MOF induced the production of ROS,which increased the inhibition rate by more than 83.78%.The antimicrobial mechanism experiments showed that it caused irreversible damage to the bacterial cell membrane through the synergistic effect of Ag^(+)and ROS.The best mechanical properties of the films were obtained at 3%citric acid content,with the water vapor transmission rate,water solubility and swelling rate reduced by 0.19 g⋅mm⋅m^(-2)⋅h^(-1)⋅kPa^(-1),65.33%and 11.26%,respectively.The antimicrobial rate of the com-posite film could reach more than 98%by adding only 1 MIC of Ag-MOF.In conclusion,photocatalytic anti-microbial agents have great potential for application in food packaging.
基金supported by the Fundamental Key Research Project of Shenzhen(Grant No.JCYJ20210324115806017)the Innovation and Entrepreneurship Project for Overseas High-Level Talents of Shenzhen(Grant No.KQJSCX20180328095603847)+1 种基金the National Natural Science Foundation of China(Grant No.51805331)the National Key R&D Program of China(Grant No.6142005180401).
文摘The consumer demand for emerging technologies such as augmented reality(AR),autopilot,and three-dimensional(3D)internet has rapidly promoted the application of novel optical display devices in innovative industries.However,the micro/nanomanufacturing of high-resolution optical display devices is the primary issue restricting their development.The manufacturing technology of micro/nanostructures,methods of display mechanisms,display materials,and mass production of display devices are major technical obstacles.To comprehensively understand the latest state-of-the-art and trigger new technological breakthroughs,this study reviews the recent research progress of master molds produced using nanoimprint technology for new optical devices,particularly AR glasses,new-generation light-emitting diode car lighting,and naked-eye 3D display mechanisms,and their manufacturing techniques of master molds.The focus is on the relationships among the manufacturing process,microstructure,and display of a new optical device.Nanoimprint master molds are reviewed for the manufacturing and application of new optical devices,and the challenges and prospects of the new optical device diffraction grating nanoimprint technology are discussed.
