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Experimental study on mechanism and protection of stress ulcer produced by explosive noise

World Journal of Gastroenterology 1998年第6期4卷 64-68页

作者： LIU Guo Shi 1. HUANG Yu Xin 1. LI Shuan Wei 2, PAN Bo Rong 3, WANG Xin 1. SUN Da Yong 1.and WANG Qing Li 1

AIM To establish an experimental model of stress ulcer produced by explosive noise, and to probe into its mechanism and protection. METHODS The country standard Wistar white rats were randomly divided into control group ( n =8), which were neither stimulated nor protected, and stimulating group (divided into subgroups A, B and C, including 8 rats each which were decapitated to draw blood for test immediately, 1. hours and 24 hours after stimulation) and prevention group (divided into subgroups A, B and C, having 8 rats each, subgroup A was given cimetidine, B anisodamine and C both drugs). Firing noises of submachine guns were used as inflicting factor. The rats were fasted for 24 hours and stimulated by firing noise for 1. hours. The change of ulcer index, gastric mucosal and related serum hormones were observed. RESULTS Stress ulcer was significant in the stimulating group, and its ulcer index (8 6±0 6) was remarkably higher than that in both the control group and prevention group (0 3±0 1. P 1.. Its serum gastrin (Gas ng/L , 294±1.3 vs 63±40, P 1. and endothelin (ET ng/L , 1.1.57 vs 1.5±42, P 1. were apparently higher than those in the control group, and its serum nitric oxide (NO) level was conspicuously lower than that in the control group ( ng/L , 0 2±0 1. vs 0 8±0 5, P 1. and stimulating group ( P <0 05). There were no significant differences in the changes of ET and NO between the control and the stimulating groups. CONCLUSION Stress ulcer model of rats can be successfully established by the stimulation of explosive noise. Gas, ET and NO are related to the formation of stress ulcer, and play an important role in its mechanism. Hepatic function affected by noise is observed in this experiment.

关键词： stomach ulcer/etiology stomach ulcer/prevention and control gastric mucosa/pathology noise/adverse effects stress ulcer

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Synthesis and Characterization of Radiate MgO Whiskers

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稀有金属材料与工程 2006年第S3期 648-649页

作者： Yanli Gong~1.Jianbao Li~1.Hong Lin~1.Xiaozhan Yang~1.Xuguang Tong~1.Xiangdong Huang~2 (1.State Key Laboratory of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Tsinghua University,Beijing 1.0084,China) (2.Department of Materials Science and Engineering,Fuzhou University,Fuzhou 350002,China)

In this paper,radiate MgO whiskers were fabricated in the system of Mg-B-NaCl-Ar at relatively low temperature. The Mg vapor reacted with trace O2contained in the reaction system and formed MgO *** appropriate conditions,the MgO vapor could reach supersaturation and grow into highly radiate *** were characterized by means of field emission scanning electronic microscopy （FE-SEM）,transmission electronic microscopy （TEM） and energy dispersive spectrometer （EDS）.The mechanism of the morphologies of MgO was discussed.

关键词： MgO whiskers Synthesis

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Molecular dynamics simulation of adsorption of an oil-water-surfactant mixture on calcite surface

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Petroleum Science 2009年第1期6卷 76-81页

作者： Lu Guiwu Zhang Xuefen Shao Changjin Yang Hong Department of Mathematics and Physics China University of Petroleum Beijing 102249 China Basic Department of Beijing Information Engineering College Beijing 100081 China

An interface super molecular structure model for oil-water-surfactant mixture and calcite was established. By using a molecular dynamics method, the effects of rhamnolipid, sodium dodecyl benzene sulfonate and sodium hexadecyl sulfonate on the interface adsorption behavior of oil molecules were investigated. It was found that these three surfactants could reduce oil-calcite interface binding energy, and play a role of oil-displacing agent.

关键词： Oil calcite adsorption molecular dynamics

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蓝相液晶指向有序的定域化及微结构制备

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物理学报 2018年第6期67卷 170-176页

作者：周康袁从龙李萧王骁乾沈冬郑致刚华东理工大学物理系上海200237 华东理工大学材料科学与工程学院上海200237

蓝相液晶晶格指向有序性的体系构建对先进光子学应用乃至软物质三维可控生长具有重要的科学与技术意义.对指向有序性的蓝相液晶进行定域化的高分子稳定,进而形成蓝相区域的微结构图案化,有望实现全新的光子调控器件.本文使用稳定性好、... 详细信息

蓝相液晶晶格指向有序性的体系构建对先进光子学应用乃至软物质三维可控生长具有重要的科学与技术意义.对指向有序性的蓝相液晶进行定域化的高分子稳定,进而形成蓝相区域的微结构图案化,有望实现全新的光子调控器件.本文使用稳定性好、操作简易、普遍的摩擦取向方法,达到蓝相晶格指向一致化目的,同时结合掩膜曝光的手段进行区域可控的光聚合,即定域光聚合,达到对蓝相晶格的定域化高分子稳定,实现了晶格指向有序、稳定性强的蓝相区域微结构图案化分布.最后基于这样的特殊结构,研究了潜在的光子学等方面的应用.

关键词：蓝相高分子稳定定域微结构

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Ruled Real Hypersurfaces of A Complex Space Form

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Acta Mathematica Sinica,English Series 1994年第4期10卷 401-409页

作者： U-Hang Ki (1. Nam-Gil Kim (2) 1. Department of Mathematics Kyungpook University 702-701 Taegu Korea 2. Department of Mathematics Chosun University 501-759 Kwangju Korea

The purpose of this paper is to define a ruled real hypersurface of a complex space form M_n(c),c≠0,and to give characterizations of this hypersurface by the infinitesimal affine transformation of the structure vecto... 详细信息

关键词： Math real Ruled Real Hypersurfaces of A Complex Space Form

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Acid/alkali gated photochromism of two diarylperfluorocyclopentenes

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Science China Chemistry 2007年第5期50卷 581-586页

作者： CHEN ZiHui1. ZHAO ShengMin2, LI ZhongYu1. ZHANG Zhi1.& ZHANG FuShi1.1.The Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 1.0084, China 2 Lab of Printing & Packing Materials and Technology-Beijing Area Major Laboratory, Beijing Institute of Graphic Communication, Beijing 1.0084, China 1. The Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China 2. Lab of Printing & Packing Materials and Technology-Beijing Area Major Laboratory Beijing Institute of Graphic Communication Beijing 100084 China

Two novel diarylfuorocyclopentenes, which underwent gated photochromism, were synthesized. It was found that the photochromic property of these diarylethenes could be switched by alternative addition of acids/alkalis,... 详细信息

关键词： photochromism, diarylethene, gated reactivity, pyridinium betaine

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Geochemical records of carbon in recent sediments of Erhai Lake, China: Implication of effects of the Himalayas uplift on global environmental changes

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Chinese Science Bulletin 1999年第S2期44卷 123-124页

作者： WAN Guojiang~1. BAI Zhanguo~(1.2), WANG Haoran~1.and HUANG Ronggui~1.1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2. State Key Laboratory of Plant Nutrition Research of Chinese Ministry of Agriculture, Institute of Soil and Fertilizer, Chinese Academy of Agricultural Sciences, Beijing 1.0081. China

THE formation and uplift of the Himalayas and the Tibetan Plateau may have been responsible for the past1.0 Ma global environmental changes, resulting in the development of a three-tiered landform in southernChina. The Yunnan-Guizhou Plateau, as the middle tier in eastern slope of the Himalayas, has beencomplex environmental unit with great altitude gradients and plateau landform characters. Both monsoonsfrom the Pacific and the Indian resulting in apparent environmental changes on variable time scales influence it. Environmental geochemical effect of low latitude-high altitude could be yielded, and well recorded in the geological bodies in this region. To build and verify a quantitative model of environmental evolution it is necessary to obtain high-resolution data of elemental cycles and mass equilibrium.

关键词： records sediments Erhai Lake Himalayas uplift global environmental changes.

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Research on an Electromagnetic Wave Exposed System for Animal Experiments

Research on an Electromagnetic Wave Exposed System for Anima...

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IEEE 2005 International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications

作者： Wu Shizeng1. Cao Zhaojin 2 , Wu Changzhe1. Yan Jing1.(1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 1.0080) (2. National Institute for Environmental Health & related Product Safety, Chinese Center for Disease Control & Prevention, Beijing 1.0021.

The effect on the electromagneticradiation biology is one of topics in great demand,which scientists have been exploring. Thesignificant on electromagnetic radiation biologyeffect to be explored is in

关键词： Electromagnetic wave, GTEMcell, Effect on electromagnetic biology, Exposedsystem, Electric field intensity.

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Tissue Distribution and Purification of Prophenoloxidase in Larvae of Asian Corn Borer, Ostrinia furnacalis Guenée (Lepidoptera: Pyralidae)

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Acta Biochimica et Biophysica Sinica 2004年第5期36卷 360-364页

作者： Cong-Jing FENG1.2 and Wen-Jun FU1. 1.nstitute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, the Chinese Academy of Sciences, Shanghai 200025, China 2The GraduateSchool of the Chinese Academy of Sciences, Beijing 1.0039, China Institute of Plant Physiology and Ecology Shanghai Institute for Biological Sciences the Chinese Academy of Sciences The Graduate School of the Chinese Academy of Sciences

Using ammonium sulphate precipitation, Blue-Sepharose CL-6B, Phenyl-Sepharose CL-4B, prophenoloxidase (PPO) was isolated and purified from hemolymph of Ostrinia furnacalis larvae. This zy- mogen was a heterodimer, and composed of two subunits with the relative molecular mass ranging from 66.2 kD to 97.4 kD determined by SDS-PAGE. Western blotting and indirect immunofluorescence test showed that PPO was present in integument, hemolymph plasma and cell membrane of granular hemocytes and oenocytoids of O. furnacalis larvae.

关键词： Ostrinia furnacalis prophenoloxidase tissue distribution purification

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型面检测修整技术在高精度复合材料反射面加工中的应用

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航天制造技术 2024年第2期 21-24页

作者：田杰侯进森王晓蕾鞠博文盛涛薛凌明郝旭峰上海复合材料科技有限公司上海201112 上海航天树脂基复合材料工程技术研究中心上海201112

为满足宇航等领域对探测技术的发展要求,研究采用型面检测修整技术实现复合材料反射面的高精度加工。针对型面检测修整技术的技术特点进行原理分析,研究满足复合材料高精度加工要求的技术参数和工艺路径。探究了压强、转速和进给速度等... 详细信息

为满足宇航等领域对探测技术的发展要求,研究采用型面检测修整技术实现复合材料反射面的高精度加工。针对型面检测修整技术的技术特点进行原理分析,研究满足复合材料高精度加工要求的技术参数和工艺路径。探究了压强、转速和进给速度等加工参数对不同型面去除效率以及去除稳定性的影响,并提出了相应解决方案。在已有型面精度数据及云图分布基础上,开展截取误差云图法进行碳纤维复合材料磨削加工,经过多次迭代,使反射面型面精度RMS由初始状态的33.4μm收敛到2.9μm。实现了全碳纤维复合材料反射面的高效高精度加工。

关键词：型面检测修整技术高精度复合材料反射面加工

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