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Single-Crystalline Hydrogen-Bonded Crosslinked Organic Frameworks and Their Dynamic Guest Sorption

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Accounts of Materials Research 2022年第11期3卷 1186-1200页

作者： Jayanta Samanta Yunjia zhang mingshi zhang Albert D.Chen Chenfeng Ke Department of Chemistry Dartmouth CollegeHanoverNew Hampshire 03755United States

CONSPECTUS:Porous organic framework materials constructed by periodically aligned molecular entities offer chemically tailored microenvironments to absorb molecules and ions for various *** understanding the microenvironments of these porous organic materialsfrom pore size,shape,and dynamics to potential substrate binding sitesis critical for the rational design of porous organic *** solid-state structures of these porous organic materials,such as covalent organic frameworks(COFs),can provide unambiguous atomic-level structural details.

关键词： materials porous details

Nanomaterial Assisted Exosome Analysis Using Mass Spectrometry

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Chemical Research in Chinese Universities 2024年第2期40卷 237-254页

作者： zhang Yi ZHOU Bokai LI Qiuning JIN mingshi BAI Yu Beijing National Laboratory for Molecular Sciences Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871P.R.China Department of Chemistry Yanbian UniversityYanji133002P.R.China

Exosomes,extracellular vesicles(EVs)that play crucial roles in biological processes,have emerged as attractive targets for noninvasive disease diagnosis and *** spectrometry(MS)offers high sensitivity,high throughput,and excellent qualification and quantification capacity,which is the ideal approach for exosome ***’unique physiochemical properties,controllable morphology,and large surface area make them promising in biological sample pretreatment and *** contributed diverse functions to the exosome MS analysis,encompassing substrates for exosome isolation and cargos enrichment,matrices for laser desorption/ionization(LDI),read-out signals and supporters for signal amplification strategies,*** this review,recent progress in the applications of nanomaterial in the exosome MS analysis was summarized and a comprehensive discussion on the challenges and perspectives was proposed for the development of an advancing analysis approach of exosomes for the accurate diagnosis and monitoring of diseases.

关键词： Exosome Nanomaterial Enrichment Matrix Mass spectrometry

Rheological Behavior for Polymer Melts and Concentrated Solutions——Part Ⅶ: A Quantitative Verification for the Molecular Theory of Non-linear Viscoelasticity with Entanglement Constraints in Polymer Melts

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Journal of Materials Science & Technology 2001年第3期17卷 375-382页

作者： mingshi SONG, Chen zhang and Guixian HU Research Institute of Polymeric Materials, Beijing University of Chemical Technology, Beijing 100029, China E-mail: wangzhchen@*** Res. Inst. of Polymeric Mat. Beijing Univ. of Chem. Technol. Beijing 100029 China

Based on the molecular theory of non-linear viscoelasticity with constrained entanglements in polymer melts, the material functions in simple shear flow were formulated, the theoretical relations between. eta((gamma) over dot), psi (10)((gamma) over dot) and shear rate ((gamma) over dot), and topologically constrained dimension number n ' and a were derived. Linear viscoelastic parameters (eta (0) and G(N)(0)) and topologically constrained dimension number (n ' a and )over bar>) as a function of the primary molecular weight (M-n), molecular weight between entanglements (M-C) and the entanglement sites sequence distribution in polymer chain were determined. A new method for determination of viscoelastic parameters (eta (0), psi (10), G(N)(0) and J(e)(0)), topologically constrained dimension number (n ', a and v) and molecular weight (M-n, M-c and M-e) from the shear flow measurements was proposed. It was used to determine those parameters and structures of HDPE, making a good agreement between these values and those obtained by other methods. The agreement affords a quantitative verification for the molecular theory of nonlinear viscoelasticity with constrained entanglement in polymer melts.

关键词： Rheological Behavior for Polymer Melts and Concentrated Solutions A Quantitative Verification for the Molecular Theory of Non-linear Viscoelasticity with Entanglement Constraints in Polymer Melts Part

Assisted System for Precise Surgery Based on Medical Image Computing and VR

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Assisted System for Precise Surgery Based on Medical Image C...

第30届中国控制与决策会议

作者： zhang mingshi Sha Hengyu Ren Zebin Tan Wenjun School of Computer Science and Engineering Northeastern University Key Laboratory of Medical Image Computing of Ministry of Education Northeastern University

Virtual assisted surgery system in the preoperative planning, teaching, communication between doctors and patients has an important application value. Due to the hardware and computer technology constraints, most of the research on the virtual surgery system based on 3 D software model simulation to simulate human tissue. To solve the problem, an assisted system for precise surgery based on medical image computing and VR is designed in this paper. Firstly, this work designed the overall scheme of the system, including function design, hardware design scheme, software design scheme and key technology, starting from the system requirements and feasibility. Secondly, the work studies the key technologies of virtual assistant surgery system, such as the generation of human tissue model and the collision detection. In order to improve the quality of grid generation and remove noise, a tetrahedral mesh generation method based on grid and improved Laplacian smoothing algorithm is adopted in this work. Finally, the modular idea is used, respectively, to start UI and virtual surgery scene construction and interaction,independent units and the overall integration test to ensure that the system is running without errors and fluent, to achieve the original design of virtual assistant surgery system.

关键词： Virtual assisted surgery system Tetrahedral mesh Grid collision detection Bounding box

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溴化衍生气相色谱法测定环境水体中痕量苯酚

分析化学 1999年第1期27卷 63-65页

作者：张明时王爱民贵州师范大学分析测试中心贵州师范大学分析测试中心贵阳550001

以溴水为衍生化试剂,使苯酚转化为三溴酚.选用抗坏血酸为稳定剂,甲苯为萃取剂,以FFAP或SE-30大口径石英毛细管柱及电子俘获检测器,采用气相色谱方法测定环境水体中痕量苯酚.本方法操作简便,灵敏度高,选择性好,线性范围宽.检测限为0.01μ... 详细信息

以溴水为衍生化试剂,使苯酚转化为三溴酚.选用抗坏血酸为稳定剂,甲苯为萃取剂,以FFAP或SE-30大口径石英毛细管柱及电子俘获检测器,采用气相色谱方法测定环境水体中痕量苯酚.本方法操作简便,灵敏度高,选择性好,线性范围宽.检测限为0.01μg/L;水样添加回收率为95%～102%;相对标准偏差为1.6%;工作曲线的线性范围0.01～40μg/L.本方法与目前国家饮用水质标准中苯酚的标准检测方法比较灵敏度提高了两个数量级,操作大大简化,并可用于各类环境水体中苯酚的测定.

关键词：气相色谱苯酚环境水柱前衍生化

Analysis on research strategy for "dark matter"in design innovation

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Analysis on research strategy for "dark matter"in design inn...

2010国际工业设计研讨会暨第十五届全国工业设计学术年会

作者： mingshi Zhao,Weiming zhang School of Architecture,Harbin Institute of Technology,150001,Harbin,China

This paper proposed that there are uncertain factors in the process of design innovation, and they are difficult to capture and *** define the "dark matter" in design innovation, compared with the mysterious dark matter in the universe,and analyze the expressions and the causes of their ***,it proposed the research strategy for the "dark matter" in design innovation, including the research based on the user,market and organization.

关键词： dark matter design innovation user market organization

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浅谈体育游戏在大学体育课程中的运用

科教导刊 2016年第2X期 34-35页

作者：张明士西南大学体育学院重庆400715

本文通过对重庆市大学体育课中体育游戏运用情况的调查,对体育游戏在体育课程中的合理实施进行了探讨、分析,得出体育游戏在体育课程中开展的重要作用和意义。同时,体育游戏的运用对提升体育教学中学生的积极性起到了促进作用。通过探... 详细信息

本文通过对重庆市大学体育课中体育游戏运用情况的调查,对体育游戏在体育课程中的合理实施进行了探讨、分析,得出体育游戏在体育课程中开展的重要作用和意义。同时,体育游戏的运用对提升体育教学中学生的积极性起到了促进作用。通过探究使学校体育课程的教学质量进一步改善。

关键词：体育游戏体育课程身心发展运用

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丙烯酰氯的气相色谱分析

分析化学 1999年第12期27卷 1475-1475页

作者：张明时赵小毛贵州师范大学分析测试中心贵州师范大学分析测试中心贵阳550001

1 引言丙烯酰氯易挥发,暴露于空气与水份作用产生盐酸酸雾,具有强烈的刺激性和腐蚀性.本文用苯胺作衍生反应试剂,使丙烯酰氯与苯胺定量反应生成N-苯基丙烯酰胺,氯化氢与过量苯胺生成氯化苯铵沉淀,从而消除了游离氯化氢对仪器的腐蚀性和... 详细信息

1 引言丙烯酰氯易挥发,暴露于空气与水份作用产生盐酸酸雾,具有强烈的刺激性和腐蚀性.本文用苯胺作衍生反应试剂,使丙烯酰氯与苯胺定量反应生成N-苯基丙烯酰胺,氯化氢与过量苯胺生成氯化苯铵沉淀,从而消除了游离氯化氢对仪器的腐蚀性和给操作带来的不便,再以邻苯二甲酸二异丙酯为内标,经OV-17柱分离,FID检测器测定,实现了丙烯酰氯的无腐蚀简便快速气相色谱分析.2 实验部分2.1 仪器和试剂 GC-9A气相色谱仪(日本岛津公司),FID检测器,CR-3A记录仪.玻璃色谱柱1.1m×3mm,OV-17固定液5%,担体Shimalite W(AW-DMCS)粒径180～154μm.丙烯酰氯对照品98%(贵州省冶金化学研究所).邻苯二甲酸二异丙酯溶液(内标溶液):60g/L苯溶液.苯胺溶液:10%(V/V)的苯溶液.所用溶剂

关键词：气相色谱分析无腐蚀刺激性试剂苯胺反应伯胺烯烃丙烯氢化合物氯化氢

红枫湖沉积物中不同形态硫与硫酸盐还原菌的分布特征

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贵州农业科学 2012年第10期40卷 190-196页

作者：尹亚茹张明时冯业强夏品华张元秦樊鑫贵州师范大学贵州省山地环境信息系统与生态环境保护重点实验室贵州贵阳550001 贵州师范大学分析测试中心贵州贵阳550001 吉林省长春市长春工业大学吉林长春130012

为了解贵州省红枫湖不同形态硫和硫酸盐还原菌的分布特征,对红枫湖6个站点进行采样,测定红枫湖沉积物中不同形态硫含量和硫酸盐还原菌数量。结果表明:红枫湖表层沉积物中含有丰富的不同形态硫和硫酸盐还原菌(SRB),各采样点总硫(TS)含量... 详细信息

为了解贵州省红枫湖不同形态硫和硫酸盐还原菌的分布特征,对红枫湖6个站点进行采样,测定红枫湖沉积物中不同形态硫含量和硫酸盐还原菌数量。结果表明:红枫湖表层沉积物中含有丰富的不同形态硫和硫酸盐还原菌(SRB),各采样点总硫(TS)含量分布范围为934～10 017μg/g,平均为4 568.33μg/g;SRB变化幅度是7 013～1 34669cfu/g(干泥重),在红枫湖表层沉积物中广泛存在,且空间分布存在差异。在垂直分布上,不同形态硫总体分布趋势为自上而下逐渐降低,SRB在沉积物界面下5cm内分布较广。以全湖平均值看,红枫湖表层沉积物不同形态硫含量由高到低顺序为黄铁矿硫>酸可挥发性硫(AVS)>硫代硫酸盐>硫酸盐>亚硫酸盐>单质硫。相关性分析表明:SRB与AVS、硫代硫酸盐及硫酸盐均具有较强的相关性。

关键词：沉积物红枫湖硫酸盐还原不同形态硫硫酸盐还原菌