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Relaxation of Chain Extension of Amorphous PET Fiber Above the Glass Transition Temperature

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chinese Chemical Letters 2000年第10期11卷 925-928页

作者： Xin LINGHU, Jun ZHAO, Rui SONG, Qing Rong FAN (Polymer Physics Laboratory, Center of Molecular Science, institute of Chemistry, chinese Academy of sciences, Beijing, 100080) Polymer Physics Laboratory Center of Molecular Science Institute of Chemistry Beijing 100080 China

The recovery of amorphous PET fiber in global chain orientation but nearly random segmental orientation (GOLR) state was studied by the hot shrinkage measurement above the glass transition temperature. The relaxation curves in the form of di-exponential decay were acquired and the change of two special times with the variation of treating temperature and residual recovery ratio ' was discussed.

关键词： GOLR state PET recovery of chain extension hot shrinkage measurement.

Decision-making facing conflicting visual cues and crossmodal interaction between olfactory and visual learning in Drosophila

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Decision-making facing conflicting visual cues and crossmoda...

Laser scanning fluorescence microscopic measurement of the movement of cleaving egg surface of Rana Amurensis

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作者： Aike GUO,institute of Neuroscience,Shanghai institutes for Biological sciences, {3. Academy of sciences,Shanghai 20003.,china institute of Biophysics, {3. Academy of sciences,Beijing 100101,china

＜正＞A prerequisite for any animal’ s survival is the ability to make decision about its sensory world. Here we show that Drosophila can make discrete and firm choices among behavioural alternatives on the basis of small difference in the saliency of visual cues（color/shape and color/position dilemma）;Mushroom bodies in Drosophila brain are likely site for such choice behavior;Dopamine neurons in Drosophila play a key role in the coding of negative reward（or punishment） probability and uncertainty behavior.

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Cell Research 1995年第1期5卷 9-24页

作者： GU GUOYAN (FORMERLY KU KUOYEN) CHENGTANG XU KONGHUA ZHANG QIRONG GAO.(Shanghai institute of Cell Biology, chinese Academy of sciences, Shanghai 20003., {3.) Shanghai institute of Cell Biology Chinese Academy of Sciences Shanghai 200031 China.&#x0002A Dedicated to Prefessor Zhen YAO on the occasion of his 80th birthday.† This work was supported by the director's foundation of Shanghai institute of Cell BiologyReceived 27October1994 Revised 6April1995 Accepted 25April1995

By laser scanning fluorescence microscopy for quan-titative measurement of fluorescence intensity changes on egg surface stained with fluorescein isothiocyanate duxing cleavage furrow extending forward, it was found that in area of presumptive cleavage furrow the scanning curve became ∨ shape, indicating dark stripe appeared in that place. Then the fluorescence intensity increased at the place where the botton of ∨ shape had located, and the scanning curve tuxned to ∧ shape, indicating single stripe was formed. While enhanced fluorescence appeared on the borders of ∧ shape, an M shape curve was found, show-ing double stripe occurred. During the distance between two borders of M shape incresing from 50 μm to 100μm,a fluorescence peak came to sight in the middle of the M shape, which being the cleavge furrow bottom. The two lateral sides of furrow bottom with decreasing fluorescence were nascent membrane. At that time the curve became W shape. By the sides of cleavage furrow the the stress folds became conspicous after double stripe stage, showing the stretching of the egg surface being increased. With our[3., 3.] and others[3.] reports that polylysine could induce the appearance of nascent membrane and phyto-hemagglutinins could decrease or prevent the appearance of nascent membrane, we believed the idea of Schroeder[25] that increasing mechanical stress could initiate nascent membrane formation and thought that the stress lay to the outsides of cleavage furrow.

关键词： cleavage egg surface movement initiating nascent membrane formation laser scanning fluorescence microscopy Rana Amurensis

Synthesis and Properties of Ru(phen)_2(phen-NHCOCH_2Br)(PF_6)_2

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chinese Chemical Letters 1999年第5期10卷 373-374页

作者： Peng WANG Yi YUAN Guo Yi ZHU (Laboratory of Electroanalytical Chemistry. Changchun institute of Applied Chemistry.chinese Academy of sciences. Changchun 13.022) Lab. of Electroanalytical Chemistry Changchun Inst. of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

A new active material for ECL sensor. Ru(phen)2(phen-NICH2Br)(PF6)2 has beendesigned and synthesized. its structure was confirmed by means of IR. MS and 'H NMR. *** of its properties such as electrochemstry. fluoresce... 详细信息

关键词： Ru(phen)_2(phen-NHCH_2Br)(PF_6_2 electrochemistry fluorescence ECL

Positive Shifts of the Reduction Potentials of C_(60) by Substitution of Cyanogens

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chinese Chemical Letters 1998年第1期9卷 99-101页

作者： Lou Zhen FAN Yong Fang LI Feng Ying LI Yu Liang LI Dao Ben ZHU(institute of Chemistry, chinese Academy of sciences, Beijing 100080) chinese Acad Sci Inst Chem Beijing 100080 Peoples R China

The electrochemical properties of a new derivative of C60 were investigated by cyclic voltammetry. It was found that the derivative was reduced at a more positive potential than C60,reflecting its significance to acce... 详细信息

关键词： C_(60) derivative electrochemical properties NIR absorption bands

Synchronized oscillation in a modular neural network composed of columns

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Science china(Life sciences) 2005年第1期48卷 6-17页

作者： LI Su, Ql Xianglin, HU Hong & WANG Yunjiu Laboratory for Visual Information Processing, institute of Biophysics, chinese Academy of sciences, Beijing 100101, {3. institute of Computing Technology, chinese Academy of sciences, Beijing 100080, {3. Laboratory for Visual Information Processing Institute of Biophysics Chinese Academy of Sciences Beijing100101 China institute of Computing Technology Chinese Academy of Sciences Beijing100080 China

The columnar organization is a ubiquitous feature in the cerebral cortex. In this study, a neural network model simulating the cortical columns has been constructed. When fed with random pulse input with constant rate, a column generates synchronized oscillations, with a frequency varying from 3.to 43.Hz depending on parameter values. The behavior of the model under periodic stimulation was studied and the input-output relationship was non-linear. When identical columns were sparsely interconnected, the column oscillator could be locked in synchrony. In a network composed of heterogeneous columns, the columns were organized by intrinsic properties and formed partially synchronized assemblies.

关键词： cortical column, synchronized oscillation, Rose-Hindmarsh model.

Stereoselective Synthesis of (6R)-6-(5-Methyl-2-furyl)-2-oxocyclohexanecarboxyl-10', 2'-Sultam

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chinese Chemical Letters 1999年第9期10卷 733-734页

作者： Xi Lu WANG You Hong HU Li Gong OU Dong Lu BAI(Shanghai institute of Materia Medica. chinese Academy of sciences, Shanghai 20003.) chinese Acad Sci Shanghai Inst Mat Med Shanghai 200031 Peoples R China

Stereoselective synthesis of sultam 8 was reported. The overall yield in a scLluence of 4steps is 27.5%.

关键词： Stcreoselective. synthesis. sultam. conjugated addition.

长短波相互作用方程的Jacobi椭圆函数求解

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物理学报 2003年第11期52卷 2660-2663页

作者：郭冠平张解放浙江师范大学教育科学与技术学院金华321004 上海大学应用数学和力学研究所

推广了Jacobi椭圆函数展开方法 ,研究了复非线性演化方程组的求解问题 ,得到了长短波相互作用方程的准确包络周期解 .该结果在一定条件下包含了相应的孤波解 .

关键词：长短波相互作用方程孤波解 Jacobi椭圆函数法非线性科学行波解数学物理方法

Involvement of dopamine D1-like receptor in activity-induced long-term potentiation of GABAergic synapses in adult mouse dentate gyrus

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Involvement of dopamine D1-like receptor in activity-induced...