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Transitional function of DG to CA3.in the hippocampus

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Progress in Natural Science:Materials International 2007年第12期17卷 1436-1444页

作者： Yan Chuankui1.and Liu Shenquan2(1. department of{1., Hangzhou Normal university, Hangzhou 3.003., {3. 2. department of Applied{1., School of Mathematical Sciences, South {3. university of Technology, Guangzhou 51.640, {3.) department of{1. Hangzhou Normal University Hangzhou 310036 China department of Applied{1. School of Mathematical Sciences South China University of Technology Guangzhou 510640 China

Using single cell channel model, the transmission features of CA3.DG network in the hippocampus are investigated. The influence of the stimulation on discharge pattern of pyramidal neurons is analyzed, which shows that it starts with period spiking discharges, followed by period-doubling bifurcation to chaos, and period 3.discharge evolving into chaos, and ultimately a period of bursting discharges. By the synaptic model, the CA3.DG network model is constructed, which analyzes the summation of postsynaptic currents in the network, the influence of postsynaptic current on discharge rhythm as well as the mechanism of bursting discharges. The strong capacity of spatiotemporal encoding in the network indicates the features of CA3.network during the information transmission process in the hippocampus. The modeling result with time delay of the synaptic transmission is in accordance with the experimental phenomena of action potential in the hippocampus.

关键词： hippocampus CA3.DG period-doubling bifurcation chaos.

K-uniformly rotund spaces and k-uniformly smooth spaces

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Chinese Science Bulletin 1998年第2期43卷 92-95页

作者： Suyalatu 1.and WU Congxin 2 1. department of{1.,Inner Mongolia Normal university, Huhhot 01.022, {3. 2. department of{1., Harbin Institute of Technology, Harbin 1.0006, {3. department of{1. Inner Mongolia Normal University Huhhot China department of{1. Harbin Institute of Technology Harbin China

The conception of k_uniform smoothness (KUS) is introduced. It is the extension of the conception of uniform smoothness. It is proved that the k_uniform smoothness and Sullivan’s K_uniform rotundity (KUR) are the daul notions. X+* is a KUR space if and only if X is a KUS space, X+* is a KUS space if and only if X is a KUR space. If X is a KUS space, then X is a (K+1.US space. It is also proved that the KUS space includes the Nan’s k_strongly smooth space.

关键词： K_uniform smoothness K_uniform convexity.

Simultaneously inducing synthesis of semiconductor selenium multi-armed nanorods and nanobars through bio-membrane bi-templates

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Science china Chemistry 2004年第6期47卷 507-511页

作者： LI Li1. WU Qingsheng1.DING Yaping2 & LI Ping3.1. {1. of Chemistry, Tongji {1., Shanghai 200092, china 2. {1. of Chemistry, Shanghai {1., Shanghai 20043., china 3. {1. of Food, Anhui Agricultural {1., Hefei 23.03., china 1. department of Chemistry Tongji University 200092 Shanghai China 2. department of Chemistry Shanghai University 200436 Shanghai China 3. {1. of Food Anhui Agricultural University 230036 Hefei China

Multi-armed nanorods and nanobars of semiconductor selenium were simultane- ously synthesized in the light of biomineralization process through bio-membrane bi-templates of rush at room temperature. The multi-armed nanorods are 60 nm in diameter and 1.5 μm in length; the nanobars are 1.0 nm in diameter and 1.00—1.00 nm in length. The XRD pattern indicates that these nanocrystals were crystallized in the hexagonal structure with lattice constants a = 0.43. nm, c = 0.495 nm. The possible formation mechanism was investigated.

关键词： selenium, multi-armed nanorods, nanobars, bio-membrane, bi-templates.

Synergistic actions of complement and lysozyme in clearance of Escherichia coli from amphioxus Branchiostoma belcheri

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Progress in Natural Science:Materials International 2009年第2期19卷 179-185页

作者： Guangfeng Wang a,Shicui Zhang a,Zhimeng Zhuang b,Zhiping Wang a a department of Marine Biology,{1. university of {3.,qingdao 266003.{3. b Yellow Sea Fisheries Research Institute,qingdao 266071,{3. [a]department of Marine Biology Ocean University of China Qingdao 266003 China [b]Yellow Sea Fisheries Research Institute Qingdao 266071 China

Amphioxus appears to lack free circulating blood cells. How it clears invading pathogens from its body remains unknown to date. We demonstrate here that amphioxus Branchiostoma belcheri is capable of efficiently eliminating the invading bacterium Escherichia coli from its humoral fluid,and the complement and lysozyme are both involved in the elimination of the invading pathogen. Both the com-plement and lysozyme act in concert against the invading bacterium,but the complement appears to play a more dominant role than the lysozyme.

关键词： Amphioxus Branchiostoma Complement Lysozyme Humoral fluids Anti-bacterial activity

A study of two-dimensional magnetic polaron

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Science china(Physics,Mechanics & Astronomy) 2006年第4期49卷 421-429页

作者： LIU Tao1. ZHANG Huaihong1. FENG Mang1.2 & WANG Kelin1.3.1. School of Science, Southwest {1. of Science and Technology, Mianyang 621.1., {1. 2. Wuhan Institute of Physics and mathematics, Chinese Academy of Sciences, Wuhan 43.070, {1. 3. department of Modern Physics, {1. of Science and Technology of {1., Hefei 23.026, {1. School of Science Southwest University of Science Technology Mianyang 621010 China Wuhan Institute of Physics mathematics Chinese Academy of Sciences Wuhan 430070 China department of Modern Physics University of Science Technology of china Hefei 230026 China

By using the variational method and anneal simulation, we study in this paper the self-trapped magnetic polaron (STMP) in two-dimensional anti-ferromagnetic material and the bound magnetic polaron (BMP) in ferromagnetic material. Schwinger angular momentum theory is applied to changing the problem into a coupling problem of carriers and two types of Bosons. Our calculation shows that there are single-peak and multi-peak structures in the two-dimensional STMP. For the ferromagnetic material, the properties of the two-dimensional BMP are almost the same as that in one-dimensional case; but for the anti-ferromagnetic material, the two-dimensional STMP structure is much richer than the one-dimensional case.

关键词： self-trapped magnetic polaron, bound magnetic polaron, impurity potential, anti-ferromagnet.

Origin and shallow-layer structure of the sediments in the Yellow Sea trough

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Acta oceanologica Sinica 1991年第1期10卷 107-115页

作者： Zhao Songling and Li Guogang Institute of oceanology, Academica Sinica,{1., 266071, {3.International department of {3. ocean Press, 1. Fuxingmenwei Street, Beijing, 1.0860, {3. Inst of oceanology Academica Sinica Qingdao 266071 China China

On the basis of the analysis and study of the records of shallow-layer profiles and information from systematic analyses of some cores and their 1.C datings, the sediments of Yellow Sea trough since the final slage the Late Pleistocene are found to have the following features. On the south slope of the trough, it is probably composed of island-shelf de posits. On the mouth of the trough, it is made up of eolian dunes and its deposits. In the centra! bottom region of the trough where intense desertization occurred in the early stage of the regression, there are parallel oblique beddings in the strata known as the 'angle of repose' texture, which demonstrates that the deposits there are composed of eolian sands. And in the late stage, thin derivative deposits developed in the northern part of the trough. On the north slope of the trough, thick-layer derivative deposits developed. This primary sedimentary pattern still remains unchanged since the occurrence of the Holocene transgression.

关键词： Origin and shallow-layer structure of the sediments in the Yellow Sea trough

OSCILLATION CRITERIA FOR NONLINEAR SECOND ORDER ELLIPTIC DIFFERENTIAL EQUATIONS

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Chinese Annals of mathematics,Series B 1996年第1期17卷 89-102页

作者： ZHANG BINGGEN ZHAO TAO B. S. LALLI (department of{1., ocean {3. of qingdao, qingdao 266003. china.)(department of{1., Arizona State {3., U.S.A.)(Departmemt of{1., {3. of Saskatchewan, Canada.) ocean UNIV{1. DEPT MATHQINGDAO 266003PEOPLES R CHINA ARIZONA STATE UNIV DEPT MATHTEMPEAZ 85287 UNIV SASKATCHEWAN DEPT MATHSASKATOONSK S7N 0W0CANADA

The second order elliptic differential equations are considered in an exterior domain Ω Rn, n≥2, where p can chang sign. Some new sufficient conditions for the oscillation of solutions of (1.1. and (1.2) are establi... 详细信息

关键词： Oscillation Nonlinear elliptic equation Riccati inequality

Morphology and electrical conductivity of PACS

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Journal of Environmental Sciences 2000年第3期12卷 319-324页

作者： GAO Bao\|yu\+1. LIU Zong\|gang\+2, YUE Qin\|yan\+3. ZHAO Hua\|zhang\+3.(1. department of Environmental Engineering, Shandong {1., Jinan 2501.0, china 2. Environmental Monitoring Station of Huaiyin, Jinan 250022, china 3. department of Environ 山东大学山东济南 2 50 1 0 0 山东济南市槐荫区环境监测山东济南 2 50 0 2 2

Polyaluminium chlorides with sulfate ion(PACS) were prepared by using AlCl 3.6H 2O, Al(SO 4) 3.1.H 2O and Na 2CO 3.as raw materials. The effects of basicity ( r ), Al 3. /SO 4 2- molar ratio and aging time on the morphology of PACS were observed by transmission electrical microscope. The influence of aging time on charge neutralization and coagulation effect of PACS was studied. The effects of basicity ( r ), Al 3. /SO 4 2- molar ratio and aging time on the electrical conductivity of PACS solution were also investigated. The experimental results show that the degree of polymerization of polyaluminium chloride(PAC) increases when SO 4 2- ion is added. The higher the basicity( r ) and the longer the aging time, the larger the size of polymer PACS. The ability of PACS neutralizing the charge on Kaolinite decreases with the increase of aging time. The electrical conductivity of PACS solution(the concentration of Al 3. ion is 0.1. mol/L) with different aging time is the function of the basicity and Al 3. /SO 4 2- molar ratios and has its maximum at r =0.5 and Al 3. /SO 4 2- =1..

关键词： coagulant PACS morphology transmission electron microscope electrical conductivity coagulation

ω-Gorenstein injective modules and dimensions

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Science china{1. 2011年第3期54卷 421-436页

作者： ZHU HaiYan1.2 & DING NanQing3.1.1. of {1., Zhejiang university, Zhejiang 3.0027, {3. 2{1. of {1., Zhejiang university of Technology, Zhejiang 3.0023. {3. 3.0} of {1., Nanjing university, Nanjing 21.093. {3. 1. department of{1. Zhejiang University Zhejiang 310027 China2. Department of Mathematics Zhejiang University of Technology Zhejiang 310023 China3. Department of Mathematics Nanjing University Nanjing 210093 China

Gorenstein injective modules and dimensions have been studied extensively by many authors. In this paper, we investigate Gorenstein injective modules and dimensions relative to a Wakamatsu tilting module.

关键词： Wakamatsu tilting module ω-Gorenstein injective module ω-Gorenstein injective dimension cotilting module