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Science China Chemistry 1982年第12期25卷 1303-1311页

作者：孙德青冯传汉张嘉庆郭振泉蒋化龙 Beijing Medical College People’s Hospital Bone Tumor Research Group Dept.Biology.Peking University.Associate Professor

An attempt has been made of cryopreservation of tissue fragments from 6 GCTB surgicalspecimens. They have been kept in 10% DMSO or 15% glycerol medium and stored in liquidnitrogen for periods up to 180 days. Tumor cellular components survive the process of slowfreezing and rapid thawing as cellular growth is successful in subsequent culture. Thoughcertain reversible ultrastructural changes have been detected, no apparent distinction couldbe found in microscopic morphology, motility, growth behavior and LDH isozyme pattern be-tween cultured cells of the cryopreserved fragments and those of the fresh ones. Electronmicroscopy shows that DMSO exceeds glycerol in protecting the ultrastructure of the cells.Slow cooling and rapid thawing is recommended because ice-crystals form in the intercellularspace. which causes only light damage to the cells.

关键词： TISSUE CRYOPRESERVATION AND REWARMING STUDY ON GIANT CELL TUMOR OF BONE mgc

Catalytic effect of a novel mgc0.5Co3 compound on the dehydrogenation of MgH2

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Progress in Natural Science:Materials International 2021年第2期31卷 264-269页

作者： Yaokun Fu Zhenmin Ding Lu Zhang Hongming Zhang Wenfeng Wang Yuan Li Shumin Han Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical Engineering Yanshan University State Key Laboratory of Metastable Materials Science and Technology Yanshan University

The application of magnesium hydride(MgH) is limited due to the high reaction temperature and slow kinetics during dehydrogenation. In order to ameliorate the dehydrogenation property of MgH, mgcCocompound with induction and catalytic effects was introduced into the Mg/MgHsystem via ball-milling and hydriding combustion methods in present study. Compared to the pure MgH,the initial hydrogen desorption temperature of MgH–mgcCocomposite lowered to 237°C, decreasing by 141°C. At 325°C the MgH–mgcCocomposite could release 4.38 wt% Hwithin 60 min, which is 4.5 times the capacity of hydrogen released by as milled-MgH. Besides, the hydrogen desorption activation energy of the MgH–mgcCocomposite was dramatically reduced to 126.7 ± 1.4 k J/mol. It was observed that mgcCowas chemically stable and no chemical transformation occurred after cycling, which not only inhibited the nucleation and growth of composite particles, but also had a positive effect on the hydrogen desorption reaction of MgHdue to its catalytic effect.This study may provide references for designing and synthesizing Mg–C–Co alloy compound for the Mg-based hydrogen storage area.

关键词： Hydrogen storage materials Magnesium hydride Dehydrogenation performance mgc 0.5 Co 3 alloy compound

Cold welding sealing of copper-water micro heat pipe ends

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中国有色金属学会会刊：英文版 2009年第3期19卷 568-574页

作者：汤勇陆龙生邓大祥袁冬 School of Mechanical and Automotive Engineering South China University of Technology

The quality of micro heat pipe(MHP) is strongly affected by sealing technology. Based on the analysis of requirements of sealing technology, a cold welding technology was presented to seal MHP. In the cold welding process, compression force was used to flatten micro groove copper(mgc) tube. Then the bonding of mgc tube was reached because of intensively plastic deformation of mgc tube under pressure. It is found that the plastic deformation area of the cold welding of mgc tube can be divided into three sections. The deformation of micro grooves in each section was investigated; the influence of the dimensions of cylindrical heads on the weld joint shape and strength was studied; and a comparison between smooth copper tube and mgc tube was done. The results show that a groove compression stage exists in the cold welding of mgc tube besides a flattened stage and a melting stage.

关键词：密封技术微型热管铜管冷焊塑性变形 mgc 焊接技术焊接工艺

社交型跨境电商平台中创作内容对顾客消费意向的作用机制——消费者与营销者的双重视角

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商业经济研究 2023年第8期 143-146页

作者：刘露蔓首尔科学综合大学院大学韩国首尔100-744 内蒙古财经大学内蒙古呼和浩特010000

由于用户和平台之间存在良好的互动性,所以社交型电商平台相比传统电商平台和线下购物平台更具发展活力。但对于社交型跨境电商平台这一新生渠道,许多经营者还缺乏相应的营销经验。因此,本文以社交型跨境电商平台为研究对象,通过实证分... 详细信息

由于用户和平台之间存在良好的互动性,所以社交型电商平台相比传统电商平台和线下购物平台更具发展活力。但对于社交型跨境电商平台这一新生渠道,许多经营者还缺乏相应的营销经验。因此,本文以社交型跨境电商平台为研究对象,通过实证分析的方式,考察了消费者创作内容(CGC)和营销者创作内容(mgc)对顾客消费意向的作用机制,同时分析了感知信息质量与感知有用性的中介效应,旨在为社交型跨境电商平台经营者优化营销策略提供参考依据。

关键词： mgc CGC 社交媒体跨境电商社交型电商平台消费意向

Retrovirus-mediated antisense RNA to bcl-2 alter the biological behavior of stomach carcinoma mgc-803 cell lines

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World Journal of Gastroenterology 1998年第S1期4卷 53-56页

ＩＮＴＲＯＤＵＣＴＩＯＮＢｃｌ２ｇｅｎｅ，ｆｉｒｓｔｄｅｔｅｃｔｅｄａｓａｐｕｔｕｔｉｖｅｏｎｃｏｇｅｎｅｌｏｃａｔｅｄｎｅａｒｔｏｔｈｅｂｒｅａｋｐｏｉｎｔｏｆｔ（１４，１８）（ｑ３２，ｑ２１）ｔｒａｎｓｌｏｃａ... 详细信息

ＩＮＴＲＯＤＵＣＴＩＯＮＢｃｌ２ｇｅｎｅ，ｆｉｒｓｔｄｅｔｅｃｔｅｄａｓａｐｕｔｕｔｉｖｅｏｎｃｏｇｅｎｅｌｏｃａｔｅｄｎｅａｒｔｏｔｈｅｂｒｅａｋｐｏｉｎｔｏｆｔ（１４，１８）（ｑ３２，ｑ２１）ｔｒａｎｓｌｏｃａｔｉｏｎｓｉｎｈｕｍａｎｆｏｌｉｃ...

关键词： stomach neoplasms RNA, antisense bcl 2 gene mgc 803 cell lines gene therapy

IMMUNOELECTRON MICROSCOPIC STUDY ON THE LOCALIZATION OF MONOCLONAL ANTIBODIES ON GASTRIC CANCER CELLS

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Chinese Journal of Cancer Research 1991年第2期3卷 44-47页

作者：魏淑敏郭琪刘晓兰董志伟樊景禹刘智卫之湄 Beijing Institute for Cancer Research Department of Biophysics Beijing Medical University Department of Biophysics Beijing Medical Universityhe localization of three monoclonal antibodies (MAb) against gastric cancer was studied on two human gastric cancer cell lines by immunoelectron microscopic technique. It has shown that the corresponding antigens of MAb 3G9 and 3H11 were distributed on the microvilli (M) and non-microvillus (NM) plasma membrane of target cells with various M to NM ratios depending on the MAbs and target cells used. However the corresponding antigens of MAb PD4 was only localized on the surface of round or finger-like bulges of target cells and never on the microvilli and non-microvillous plasma membrane. Since the nature and function of these tumor antigens have not been identified yet the implication of the different distributions of these antigens remians to be clarifated.

The localization of three monoclonal antibodies (MAb) against gastric cancer was studied on two human gastric cancer cell lines by immunoelectron microscopic technique. It has shown that the corresponding antigens of MAb 3G9 and 3H11 were distributed on the microvilli (M) and non-microvillus (NM) plasma membrane of target cells, with various M to NM ratios depending on the MAbs and target cells used. However, the corresponding antigens of MAb PD4 was only localized on the surface of round or finger-like bulges of target cells and never on the microvilli and non-microvillous plasma membrane. Since the nature and function of these tumor antigens have not been identified yet, the implication of the different distributions of these antigens remians to be clarifated.

关键词： IMMUNOELECTRON MICROSCOPIC STUDY ON THE LOCALIZATION OF MONOCLONAL ANTIBODIES ON GASTRIC CANCER CELLS mgc IgG

基于H.248协议的IP用户媒体网关设计模型

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东北大学学报（自然科学版） 2004年第10期25卷 927-930页

作者：李瀛李海旭王光兴东北大学信息科学与工程学院辽宁沈阳110004

介绍了NGN和软交换的概念,根据'中国软交换设备总体技术要求',提出了基于H.248协议的IP用户媒体网关的一种设计模型,对系统进行了仿真,并说明了各个模块的功能和实现以及用户媒体网关之间语音数据处理流程·最后,分析了系统实现的难点... 详细信息

介绍了NGN和软交换的概念,根据'中国软交换设备总体技术要求',提出了基于H.248协议的IP用户媒体网关的一种设计模型,对系统进行了仿真,并说明了各个模块的功能和实现以及用户媒体网关之间语音数据处理流程·最后,分析了系统实现的难点与关键技术·应用这种设计模型,可以保护已有PSTN网的巨额投资,解决了现有各种类型用户顺利接入NGN问题,实现其原有的基本业务和各种增值业务,进而使PSTN网平滑过渡到下一代网络·

关键词： NGN 软交换 H.248 RTP/RTCP IP用户媒体网关 mgc PEFN

ANSYS在气体探测器电场分布计算中的应用

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高能物理与核物理 2003年第7期27卷 623-627页

作者：来永芳郭勇李元景李金军事医学科学院清华大学工程物理系北京100084

介绍了气体探测器电场分布的计算方法 ,以计算MSGC探测器单元电场分布为例说明了如何用ANSYS软件包来计算结构较复杂的气体探测器内部电场分布 ,同时讨论了电场分布对气体探测器性能的影响 .

关键词： ANSYS 电场分布计算方法电场强度 MSGC 漂移速度微条气体探测器微间隙气体探测器 mgc

一种验证双基编队卫星InSAR相位同步mgc正确性的方法研究

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雷达与对抗 2023年第2期43卷 20-24页

作者：赵毅轩刘爱芳黄龙中国电子科技集团公司第十四研究所南京210039

针对新型系统工程实际需求,提出一种快速验证InSAR相位同步mgc正确性的方法。利用等效思想与矢量投影方法,巧妙快速计算同步信号发射接收的离轴角,减少了运算量,提高了算法的时效性;通过模拟卫星遥测数据、卫星下行的同步信号数据开展... 详细信息

针对新型系统工程实际需求,提出一种快速验证InSAR相位同步mgc正确性的方法。利用等效思想与矢量投影方法,巧妙快速计算同步信号发射接收的离轴角,减少了运算量,提高了算法的时效性;通过模拟卫星遥测数据、卫星下行的同步信号数据开展地面仿真试验。仿真与试验结果证明了方法的有效性,为双基编队卫星InSAR相位同步性能评估提供了有效保障。

关键词： InSAR 相位同步 mgc