检索结果-南通市图书馆

Establishment of the key Technical Indicators of Positive Pressure Biological Protective Clothing

在线全文

学校读者我要写书评

暂无评论

Journal of Biosafety and Biosecurity 2019年第2期1卷 128-133页

作者： Hao Limei Zhang Zongxing Yi Ying qi jiancheng Zhou Yongyun Wu Jinhui Institute of Medical Support Technology Academy of System EngineeringAcademy of Military ScienceTianjin 300161China National Bio-protection Engineering Center Tianjin 300161China China National Accreditation Center for Conformity Assessment Beijing 100101China

Objective:Trying to establish the key technical indicators related to positive pressure biological protective clothing(PPBPC),providing technical support for the establishment of PPBPC standards in the ***:We examined the protection standard systems established by the major standards organizations in China and other developed *** also analyzed the technical indicators of the gas-tight chemical protective clothing and ventilated protective clothing against particulate radioactive contamination which closely related to *** tested the performance of a set of imported dual-purpose PPBPC to verify the fit of its technical indicators with the *** aimed to identify the status of China’s standards in the area of personnel protection and put forward feasible suggestions for the production of PPBPC in ***:Developed countries in Europe and North America have a complete system of standard protective *** should also strengthen the construction of standard protective clothing,especially ***:With the improvements in infectious disease prevention and control on a global scale,the demand for PPBPC continues to increase and consideration should be given to the establishment of standards for this.

关键词： Biosafety Protective clothing Positive pressure Standard

Research and development of airtight biosafety containment facility for stainless steel structures

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Biosafety and Biosecurity 2019年第1期1卷 56-62页

作者： Zongxing Zhang Jinhui Wu Enlei Zhang Siqing Zhao Dong Wang Ying Yi jiancheng qi Institute of Medical Service Technology Academy of Military Science PLA ChinaTianjin 300161China National Bio-Protection Engineering Center of China Tianjin 300161China Academy of Military Medicine Academy of Military Sciences PLA ChinaBeijing 100071China Harbin Veterinary Research Institute Chinese Academy of Agricultural SciencesHarbin 150069China

Objective:Airtightness of containment structures of a high-level biosafety laboratory is a critical parameter for preventing leakage of harmful *** aim of this study is to investigate the sealing technology of stainless steel structural airtight biosafety containment ***:An experimental study was conducted on a domestic high-level pathogenic microorganism model laboratory,considering the sealing process of the containment structure,including airtight doors,pass boxes,dunk tanks,through-wall pipeline sealing devices,and sealed floor ***:The results indicate that the airtightness of the model laboratory containment structure meets the tightness requirements of a biosafety level-4(BSL-4)*** also indicate that the construction technology of stainless steel enclosure structures used by the laboratory and the tightness performance and installation process of the developed airtight protective equipment meet the technical requirements of a BSL-4 ***:This successful model laboratory indicates that China has the research and development capacity for stainless steel airtight containment structure manufacturing processes,airtight protective equipment,and technical capacity for independent construction of the highest-level pathogenic microorganism laboratories.

关键词： Biosafety level-4 laboratory Airtightness Containment structure Sealing process

Sulfur and carbon co-doped g-C_(3)N_(4)microtubes with enhanced photocatalytic H2 production activity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers in Energy 2024年第1期18卷 110-121页

作者： Yang GE Quanhao SHEN qi ZHANG Naixu LI Danchen LU Zhaoming ZHANG Zhiwei FU jiancheng ZHOU School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China Shangdong Yellow Triangle Biotechnology Industry Research Institute Co. Ltd.Dongying 257091China Xuzhou B&C Chemical Co. Ltd.Xuzhou 221300China

Metal-free graphitic carbon nitride(g-C_(3)N_(4))has captured significant attention as a low-cost and efficient hydrogen production photocatalyst *** regulating the microstructure and accelerating the separation of photogenerated carriers remain crucial strategies for promoting the photocatalytic performance of this ***,a novel sulfur–carbon co-doped g-C_(3)N_(4)(SCCN)hierarchical microtubules filled with abundant nanosheets inside by thermal polymerization is *** nanosheets create abundant pores and cavities inside the SCCN microtubes,thereby increasing the specific surface area of g-C_(3)N_(4)and providing sufficient reactant attachment ***,the hierarchical structure of SCCN microtubules strengthens the reflection and scattering of light,and the utilization of visible light is favorably *** importantly,co-doping S and C has greatly improved the photocatalytic performance of graphitic carbon nitride,optimized the band gap structure and enhanced the photogenerated carrier ***,the SCCN exhibits a remarkable photocatalytic H_(2)evolution rate of 4868μmol/(g·h).This work demonstrates the potential of multi-nonmetal doped g-C_(3)N_(4)as the ideal photocatalyst for H2 evolution.

关键词： carbon nitride photocatalysis hydrogen production

Qualitative analysis of aromatic compounds via 1D TOCSY techniques

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Magnetic Resonance Letters 2024年第1期4卷 21-27页

作者： Wenbo Dong qi Zhao jiancheng Zhao Jiarong Zhang Yingxiong Wang Yan qiao State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of Sciences27 South Taoyuan RoadTaiyuan030001China Graduate University of Chinese Academy of Sciences Beijing100049China Marine Biomedical Research Institution Guangdong Medical UniversityZhanjiang524023China College of Chemistry Taiyuan University of Technology79 Yingze West StreetWanbailin DistrictTaiyuan030024China

The aromatic compounds,including o-xylene,m-xylene,p-xylene,and ethylbenzene,primarily originate from the catalytic reforming of crude oil,and have a wide variety of ap***,because of similar physical and chemical properties,these compounds are difficult to be identified by gas chromatography(GC)without standard *** the development of modern nuclear magnetic resonance(NMR)techniques,NMR has emerged as a powerful and efficient tool for the rapid analysis of complex and crude mixtures without *** this study,the parameters of one-dimensional(1D)total correlation spectroscopy(TOCSY)NMR techniques,including 1D selective gradient TOCSY and 1D chemicalshift-selective filtration(CSSF)with TOCSY,were optimized to obtain comprehensive molecular structure *** results indicate that the overlapped signals in NMR spectra of nonpolar aromatic compounds(including o-xylene,m-xylene,p-xylene and ethylbenzene),polar aromatic compounds(benzyl alcohol,benzaldehyde,benzoic acid),and aromatic compounds with additional conjugated bonds(styrene)can be resolved in 1D *** importantly,full molecular structures can be clearly distinguished by setting appropriate mixing time in 1D *** approach simplifies the NMR spectra,provides structural information of entire molecules,and can be applied for the analysis of other structural isomers.

关键词： 1D TOCSY NMR technologies Xylenes Aromatic compounds Structure information of entire molecular Qualitative analysis

Resilience Augmentation in Unmanned Weapon Systems via Multi-Layer Attention Graph Convolutional Neural Networks

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第8期80卷 2941-2962页

作者： Kexin Wang Yingdong Gou Dingrui Xue jiancheng Liu Wanlong qi Gang Hou Bo Li Northwest Institute of Mechanical and Electrical Engineering Xianyang712099China

The collective Unmanned Weapon System-of-Systems(UWSOS)network represents a fundamental element in modern warfare,characterized by a diverse array of unmanned combat platforms interconnected through hetero-geneous network *** its strategic importance,the UWSOS network is highly susceptible to hostile infiltrations,which significantly impede its battlefield recovery *** methods to enhance network resilience predominantly focus on basic graph relationships,neglecting the crucial higher-order dependencies among nodes necessary for capturing multi-hop meta-paths within the *** address these limitations,we propose the Enhanced-Resilience Multi-Layer Attention Graph Convolutional Network(E-MAGCN),designed to augment the adaptability of *** approach employs BERT for extracting semantic insights from nodes and edges,thereby refining feature representations by leveraging various node and edge ***,E-MAGCN integrates a regularization-based multi-layer attention mechanism and a semantic node fusion algo-rithm within the Graph Convolutional Network(GCN)*** extensive simulation experiments,our model demonstrates an enhancement in resilience performance ranging from 1.2% to 7% over existing algorithms.

关键词： Resilience enhancement heterogeneous network graph convolutional network

Development of biosafety equipment for high containment laboratory and for personal protection in China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biosafety and Health 2020年第1期2卷 12-17页

作者： Zhang Zongxing Wu Jinhui Hao Limei Yi Ying qi jiancheng Institute of Medical Service Technology Academy of Military Science PLA ChinaTianjin 300161China National Bio-Protection Engineering Center of China Tianjin 300161China

Biosafety equipment is the key barrier enabling high containment laboratories to handle high risk agents that may cause serious and potentially lethal infections. This perspective thoroughly analyzes the development of many kinds of key biosafety technologies, and equipment for protection of laboratory workers and for high containment laboratory facilities in China. Over more than ten years of rapid development, China has had remarkable achievements in key biosafety technologies and equipment in high containment laboratories. These technologies basically meet the needs of high containment laboratories construction in China. Furthermore, according to the current global situation regarding the prevention and control of infectious diseases and the technical development level of biosafety equipment, this paper proposes targeted suggestions and notes that China still needs to increase investment in scientific research to provide further technical and equipment support enabling us to build a community with a bright future in terms of human biosafety.

关键词： Biosafety Containment laboratory Biosafety equipment Protection Infectious disease

Rapid and accurate evaluation of vaporized hydrogen peroxide on the efficiency of disinfection, using a sensitive dual-channel laser scanning cytometer

在线全文

学校读者我要写书评

暂无评论

Biosafety and Health 2021年第1期3卷 56-64页

作者： Meng Chen jiancheng qi Yaohua Du Zhi Cheng Tianyu Cai Chao Li Institute of Medical Support Technology Academy of System Engineering Academy of Military ScienceTianjin 300161China

Vaporized hydrogen peroxide(VHP)is a highly active disinfectant,and VHP decontamination systems have been widely applied in hospitals,microbiological laboratories,and pharmaceutical ***,the decomposition of VHP into non-toxic by-products is *** of the disinfection efficacy of VHP is crucial to ensuring the reliability of VHP disinfection and controlling microbial *** this study,a rapid and sensitive strategy is proposed to evaluate the efficacy of VHP in surface disinfection by detecting the survived and killed bacteria from VHP-exposed biological indicators(BIs).A dual-channel solid-phase cytometer is designed,and fluorescent dyes are used as indicators to automatically and accurately distinguish live cells from dead cells in themixtures of *** verify the availability and effectiveness of the laser scanning cytometry,experiments on its application in estimating the efficacy of VHP disinfection practice have been carried out in this study,and its estimation effect compared with that of the traditional plate counting *** show that the proposed assay might distinctly identify live or killed cells labeled by green and red fluorescent dyes and examined the disinfection efficacy in 30 min by calculating the bactericidal *** with the plate counting method,the proposed approach is accurate and practical,with an average detection efficiency of 98.47%±1.55%.Moreover,an excellent correlation between the concentrations of *** var niger(ATCC 9372)measured by the proposed detection system and by the plate counting method is noticed(R2=0.9971),indicating that this approach had advantages in the detection of trace *** summarize,the proposed strategy appears practical and significant in many fields in which microbial counting and identification are required.

关键词： Microbial contamination control VHP surface disinfection Live/dead identification Bactericidal rate Disinfection efficacy assurance

Protective performance test and safety risk evaluation of a powered air-purifying suit

在线全文

学校读者我要写书评

暂无评论

Biosafety and Health 2019年第2期1卷 91-97页

作者： Hao Limei qi jiancheng Wang Runze Yi Ying Wu Jinhui Institute of Medical Support Technology Academy of System EngineeringAcademy of Military ScienceChina National Bio-Protection Engineering Center of China Tianjin 300161China

The positive pressure biological protective suit is the highest degree of personal protective equipment, and its performance directly impacts the health and safety of the wearer. Protection factor is the most critical measure of the performance of a positive pressure bio-protective suit. This study establishes a dynamic detection system for the positive pressure bio-protective suit, to evaluate its safety risks, and explores methods to reduce these risks. A manikin was used to perform human actions, such as raising the arms, sitting, and walking, that were simulated at different levels. Integrity breaches of different shapes and sizes were made to different parts of the suit for evaluation. The aerosol concentration and the pressure of the suit were detected. Positive-pressure suits provide exceptionally good protection even in accident scenarios and provide a greater flexibility and more ergonomic benefits. However, sufficiently large (>3 cm) breaches caused a negative-pressure and an inward airflow during vigorous activities. The location of the breach site on the suit also had a significant effect on bio-aerosol leakage. Studies have shown that effective methods to avoid the risk of damage include increasing the air supply flow and performing gentle movements while wearing the suit. The dynamic detection method and the results obtained in this study are a significant advance to predict and avoid the risks associated with powered air-purifying suits.

关键词： Powered air-purifying suit Protective performance Safety risk

Disinfection efficiency of positive pressure respiratory protective hood using fumigation sterilization cabinet

在线全文

学校读者我要写书评

暂无评论

Biosafety and Health 2019年第1期1卷 46-53页

作者： Limei Hao Jinhui Wu Enlei Zhang Ying Yi Zongxing Zhang Jinming Zhang jiancheng qi Institute of Medical Support Technology Academy of System EngineeringAcademy of Military ScienceChina National Bio-Protection Engineering Center of ChinaTianjin 300161China

Concerns have been raised about both the disinfection and the reusability of respiratory protective equipment following a disinfection ***,there is little data available on the effects of disinfection and decontamination on positive pressure respiratory protective hoods(PPRPH).In this study,we evaluated the effect of vaporized hydrogen peroxide(VHP)on the disinfection of PPRPH to determine applicability of this method for disinfection of protective equipment,especially protective equipment with an electric supply system.A hydrogen peroxide-based fumigation sterilization cabinet was developed particularly for disinfection of protective equipment,and the disinfection experiments were conducted using four PPRPHs hung in the fumigation *** pathogenic microorganism Geobacillus stearothermophilus ATCC 7953 was used as a biological indicator in this study and the relationship between air flow(the amount of VHP)and disinfection was *** function and the material physical properties of the PPRPH were assessed following the disinfection *** surviving Geobacillus stearothermophilus ATCC 7953,both inside and outside of these disinfected PPRPHs,could be observed after a 60 min treatment with an air flow of 10.5–12.3 m^(3)/*** function and material physical properties of these PPRPHs met the working requirements after *** study indicates that air flow in the fumigation chamber directly influences the concentration of *** protective equipment fumigation sterilization cabinet developed in this paper achieves the complete sterilization of the PPRPHs when the air flow is at 10.5–12.3 m^(3)/h,and provides a potential solution for the disinfection of various kind of protective equipment.

关键词： Vaporized hydrogen peroxide Positive pressure respiratory protective hood Fumigation sterilization cabinet Disinfection efficiency