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Rapid Inhibition of the Glutamate-induced Increase of Intracellular Free Calcium by Magnesium in Rat Hippocampal Neurons

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2004年第5期24卷 424-426页

作者：张蕲胡波孙圣刚邓学军梅元武童萼塘 Department of Phathophysiology School of Basic Medical Sciences Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China Department of Neurology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China

By using Fura-2.AM, the effects of magnesium (Mg 2.) on the glutamate-induced increase of intracellular free calcium ([Ca 2.]i) in the cultured hippocampal neurons and the features were investigated by integrated photoelectric detecting system. The experiments were designed to three groups (The drug was spit to the cells for 2. s): Group A receiving 1×10 —5 mol/L glutamate; Group B receiving 1×10 —5 mol/L glutamate and1×10 —5 mol/L Mg 2. simultaneously; Group C receiving 1×10 —5 mol/L glutamate again after [Ca 2.]i in group B back to the baseline. The results showed that in group A, [Ca 2.]i was obviously increased. In group B, the changes in [Ca 2.]i and the peak value were significantly decreased. Moreover, the elevation of Phase 1 was slowed down and Phase 2.was shortened to some extent, and the plateau phase between them was relatively prolonged. In group C, calcium oscillation similar to that in group A occurred, but both the Phase 1 and Phase 2.were shortened and the △[Ca 2.]i was slightly decreased. It was suggested that Mg 2. could quickly inhibit the rise of [Ca 2.]i induced by glutamate in the cultured hippocampal neurons in rats.

关键词： magnesium glutamate intracellular free calcium

Induced phase transition of BECs in optical lattices by impurity

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Science China(Physics,Mechanics & Astronomy) 2010年第3期53卷 469-473页

作者： TIAN DongPing1,2.& LIU XuanZuo1 1Institute of Condensed Matter Physics, School of Science, Xi’an Jiaotong University, Xi’an 710049, China 2.i’an University of Architecture and Technology, Xi’an 710055, China Institute of Condensed Matter Physics School of Science Xi’an Jiaotong University Xi’an China Xi’an University of Architecture and Technology Xi’an China

In this work, the influence of imparity on BECs in optical lattices is investigated, and the possibility of MI-SF transition induced by impurity is verified. After the numerical calculation, the schematic phase diagram is discussed with an emphasis on the role of impurity. When n10 = n2., the phase boundaries coincide with each other; when n10 2. and U12.2. and U12.> 0, the phase boundaries may or may not intersect, depending on the values of U12. n10 and n2..

关键词： BECs Green function MI-SF transition

A three-dimensional k-ε-k_p model in curvilinear coordinates for sediment movement and bed evolution

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Science China(Technological Sciences) 2009年第4期52卷 1090-1100页

作者： SHEN YongMing1 & LIU Cheng2.1 State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 11602., China 2.Pearl River Hydraulic Research Institute, Guangzhou 510611, China State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116023 China Pearl River Hydraulic Research Institute Guangzhou 510611 China

To aim at the substitution of the magnitude and direction of water flow movement near bed for those of bed load transport in solid-liquid two-phase one-fluid model, and to simulate the effect of secondary flow on transverse bed load transport in channel bends and the effect of bed slope on bed load trans- port in a better way, a three-dimensional k-ε-kp solid-liquid two-phase two-fluid model in curvilinear coordinates is solved numerically with a finite-volume method on an adaptive grid for studying wa- ter-sediment movements and bed evolution in a 12.° channel bend. Numerical results show that the trajectories of solid-phase deviate from those of liquid-phase in the channel bend, and the deviation increases with the increase of the particle diameters. The calculated bed deformation by the k-ε-kp model is in better agreement with measured bed deformation than those by one-fluid model. It is proved that the k-ε-kp model can simulate the effect of secondary flow on lateral bed load transport with the higher accuracy than the one-fluid model.

关键词： curvilinear coordinates three-dimensional k-ε-kp model two-fluid model solid-liquid flows channel bend bed load bed evolution tra- jectory

C^MC^N D-computable state

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Science China(Physics,Mechanics & Astronomy) 2008年第9期51卷 1300-1307页

作者： LIU DongDong1,2.& DI YaoMin1 1 School of Physics & Electronic Engineering,Xuzhou Normal University,Xuzhou 2.1116,China 2.School of Mathematics & Physics Science,Xuzhou Institute of Technology,Xuzhou 2.1008,China School of Physics & Electronic Engineering Xuzhou Normal University Xuzhou China School of Mathematics & Physics Science Xuzhou Institute of Technology Xuzhou China

The notions of D-computable state and D-concurrence are generalized to the CMCN system. A class of D-computable state on CMCN is given and the calculating method of the lower bound of D-concurrence is provided. Th... 详细信息

关键词： quantum entanglement entanglement of formation concurrence D-computable state

Review on Sino-German Cooperation Projects on Sustainable Forest Management

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Chinese Forestry Science and Technology 2010年第4期9卷 42-52页

作者： LEI Jingpin1 CHANG Ermei1 JIANG Zeping1 SHEN Suhua2.GUO Yufu2.1. Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, P.R.China 2. Interantional Cooperation Project Center, State Forestry Administration, Beijing 100714, P.R.China

Sino-German financial cooperation projects began in the 1980s, containing both technique and finance areas. Sino-German cooperation projects not only produced the significant eco-efficiency and economic benefits by raising forest coverage, but also made Chinese forestry workers acquire new idea and technology of forestry. However, forestry infrastructure and technological information sevice are still imperfect, forestry policy is not suitable and follow-up funds are insufficient. The outcome and experience of Sino-German cooperation projects after 2. years were summarized through analysis the activities and social ecological benefits. Advanced forest management technology and improvement of forest management were introduced and capacity building was remarkably improved by implementing Sino-German financial cooperation projects. At last, the gaps appearing in the Sino-German cooperation were pointed out, and factors which constrained smooth implementation were analyzed in this paper.

关键词： sustainable forest management Sino-German cooperation project

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非饱和土中镉离子迁移规律的实验研究

水动力学研究与进展（A辑） 2003年第6期18卷 725-731页

作者：崔凯李宝元李兴斯大连理工大学工业装备结构分析国家重点实验室大连116023 大连理工大学工程力学系大连116023

　采用实验室土柱法研究了重金属镉离子在非饱和土壤中的迁移规律。通过微机控制真空系统,使得土柱出流端维持稳定负压,从而使土样获得比单靠重力自流更低的饱和度。实验过程通过分时加污及加水,模拟了实际污染及清洗过程。针对9种来自... 详细信息

　采用实验室土柱法研究了重金属镉离子在非饱和土壤中的迁移规律。通过微机控制真空系统,使得土柱出流端维持稳定负压,从而使土样获得比单靠重力自流更低的饱和度。实验过程通过分时加污及加水,模拟了实际污染及清洗过程。针对9种来自比利时和葡萄牙的土样进行了实验,得到了相应的穿透曲线。在实验结果及有限元法正演的基础上,利用梯度正则化方法反演确定镉离子在相应非饱和土样中迁移的相关参数:纵向弥散度、吸附速度、裂解速度和相对最大沉淀量,得到了具有应用价值的参数结果。

关键词：非饱和土镉离子迁移对流扩散参数反演纵向弥散度吸附速度裂解速度环境污染

The Glacier Area Changes in the Qangtang Plateau Based on the Multi-temporal Grid Method and its Sensitivity to Climate Change

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Journal of Mountain Science 2011年第6期8卷 882-893页

作者： WANG Liping XIE Zichu WANG Xin LIU Shiyin DING Liangfu SHANGGUAN Donghui The College of Resources and Environmental Science Hunan Normal University Changsha China Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou China Department of Geography Hunan University of Science and Technology Xiangtan China

Glacier area changes in the Qangtang Plateau are analyzed during 1970-2.00 using air photos,relevant photogrammetric maps and satellite images based on the multi-temporal grid *** results indicate that the melting of glaciers accelerated,only a few of glaciers in an advancing state during 1970-2.00 in the whole Qangtang ***,the glaciers seemed still more stable in the study area than in most areas of western *** estimate that glacier retreat was likely due to air temperature warming during 1970-2.00 in the Qangtang ***,the functional model of glacier system is applied to study climate sensitivity of glacier area changes,which indicates that glacier lifespan mainly depends on the heating rate,secondly the precipitation,and precipitation increasing can slow down glacier retreat and make glacier lifespan prolonged.

关键词： The Qangtang Plateau Glacier change Multi-temporal Climate change Functional model ofglacier system Simulation

Effect of Pesticides on soil microbial and enzyme activity

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Effect of Pesticides on soil microbial and enzyme activity

Delayed Hopf bifurcation in time-delayed slow-fast systems

两岸三地药理学与临床药理学术会议

作者： LI Xia~1 WANG Lan~2.LI Xiao-hui~1 (1. Institute of Materia Medica, Third Military Medical University, Chongqing 400038, China 2. Chengdu Institute of Biology, Chinese Acadamy of Sciences, Chengdu 610041, China)

Objective Pesticides has gain an increasing awareness because of it is becoming a serious environ- mental problem and come to threaten the health of *** effect of five pesticides (zineb,cop- force,the mixture of carbendazim and mancozeb,hymexazol) on soil bacteria,fungi,actinomyces,and Five specific enzymes were chosen for investigation (urease,dehydrogenase,invertase,acid phosphates and pro- tease).Methods The enumeration of the soil micro flora was done by the dilution plate method;The enzyme activity was determined by traditional ***-Wiener index as well as 16S rRNA-PCR amplifica- tion and DGGE fingerprinting was used for detection of shift in microbial community diversity in pesticides contaminated agricultural *** The outcome showed that the microbial diversity was significantly changed after the application of pesticides,the effect of pesticides on microbe had a order from top to bot- tom:*** Our results indicate that the use of the pesticides hymexazol resulted in an altered soil community structure,in particular for the *** was markedly in- hibited by hymexazol,zineb,carbendazim and mancozeb and the inhibiting rates were varied between 30.30 % and 2..2.%;Urease activity was also inhibited significantly by hymexazol,the inhibiting rate was 37.67%;Protease activity was markedly inhibited by zineb and hymexazol,the inhibiting rates were 2..2. % and 18.18 % respectively;Phosphates activity was inhibited significantly by hymexazol,zineb,car- bendazim and mancozeb,the inhibiting rates were range from 2..12.%-3.54 %;Dehydrogenase activity was not significantly affected by ***,the correlation of all indexes were analyzed,the data sug- gested that all indexes existed certain correlation.

关键词： pesticides soil microbe soil enzyme microbial diversity

来源： cnki会议评论

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Science China(Technological Sciences) 2010年第3期53卷 656-663页

作者： ZHENG YuanGuang1 & WANG ZaiHua1,2.1 Institute of Vibration Engineering Research,Nanjing University of Aeronautics and Astronautics,Nanjing 2.0016,China 2.Institute of Science,PLA University of Science and Technology,Nanjing 2.1101,China Institute of Vibration Engineering Research Nanjing University of Aeronautics and Astronautics Nanjing China Institute of Science PLA University of Science and Technology Nanjing China

This paper presents an investigation on the phenomenon of delayed bifurcation in time-delayed slow-fast differential *** the two delayed's have different *** delayed bifurcation means that the bifurcation does not happen immediately at the bifurcation point as the bifurcation parameter passes through some bifurcation point,but at some other point which is above the bifurcation point by an obvious *** a time-delayed system,the evolution of the system depends not only on the present state but also on past *** this paper,the time-delayed slow-fast system is firstly simplified to a slow-fast system without time delay by means of the center manifold reduction,and then the so-called entry-exit function is defined to characterize the delayed bifurcation on the basis of Neishtadt's *** shows that delayed Hopf bifurcation exists in time-delayed slow-fast systems,and the theoretical prediction on the exit-point is in good agreement with the numerical calculation,as illustrated in the two illustrative examples.

关键词： time delay delayed bifurcation Hopf bifurcation slow-fast systems exit-point entry-exit function