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CMC surfaces in the hyperbolic 3-space

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Chinese Science Bulletin 1998年第7期43卷 547-550页

作者： YU Zuhuan 1, 2 and LI Zhenqi 1, 3 1. institute of mathematics, fudan university, shanghai 200433, china 2. Department of mathematics,Sichuan Union university, Chengdu 610064, china 3. Department of mathematics, Nanchang university, Nanchang 33 nstitute of Mathemalics Fudan University Shanghai China Department of mathematics Sichuan Union University Chengdu China Department of mathematics Nanchang University Nanchang China

CMC-H surfaces satisfying H≥1 are studied. It is proved that these surfaces possess a natural representation which is a generalization of the Bryant’s result.

关键词： hyperbolic space CMC surface Weierstrass representation.

Preparation and characterization of some surface negatively charged residue mutants of cytochrome b_5

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Chinese Science Bulletin 2001年第7期46卷 555-559页

作者： WANG Yunhua, WANG Wenhu, LU Junxia, REN Yi, GU Shaohua, xie Yi & HUANG Zhongxian1. Chemical Biology Lab, Department of Chemistry, fudan university, shanghai 200433, china 2. Genetic institute, school of Life, fudan university, shanghai 200433, china Chemical Biology Lab Department of Chemistry Fudan University Shanghai China Genetic institute School of Life Fudan University Shanghai China

Site-directed mutagenesis was used to obtain seven variants of tryptic fragment of bovine liver cytochrome bs (cyt bs), in which the negatively charged residues around the heme exposed edge of cyt bs were replaced by hydropho-bic amino acid alanine. Double-site mutants, triple-site mutants and even quadruple-site mutants were obtained. DNA sequencing and molecular weight measurements of the mutant proteins both confirmed that these site-directed muta-genesises were successfully performed. Spectroelectrochem-istry of these mutant proteins revealed that the apparent redox potentials of these mutant proteins caused a positive shift of 2-10 mV. The global structure of these mutant proteins did not show much difference from that of the wild type cyt bs, providing a solid base for the further study on the roles of the proteins’ surface charges.

关键词： cytochrome bs site-directed mutagenesis negative charge on the protein surface redox potential.

THE REGULARITY OF SOLUTIONS FOR NONLINEAR DEGENERATE ELLIPTIC BOUNDARY VALUE PROBLEM

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Chinese Annals of mathematics,Series B 1990年第3期11卷 330-341页

作者：洪家兴 institute of mathematics Fudan University

This paper is devoted lo the study of regularity of solutions for Dirichlet probelm ofnonlinear degenerate elliptic equations in two dimensional case. A sufficient condition fortheir solutions in C3+α（Ω） to be cer... 详细信息

关键词： regularity elliptic degenerate devoted Dirichlet proof Nirenberg grateful implies milar

Local Existence of the Shock Front Solution to the Axi-symmetrical Piston Problem in Compressible Flow

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Acta Mathematicae Applicatae Sinica 2004年第4期 589-604页

作者： Ze Jun WANG institute of mathematics,fudan university,shanghai 200433,P.R.china

In this paper,we study a kind of 2-dimensional axi-symmetrical piston problem in com-pressible *** corresponding mathematical model is the well-known Euler *** theNewton iteration procedure and energy estimate,we give... 详细信息

关键词： Piston problem Euler system Shock front solution Newton iteration Energy estimate

Mean Curvature Flow via Convex Functions on Grassmannian Manifolds

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Chinese Annals of mathematics,Series B 2010年第3期31卷 315-328页

作者： Yuanlong XIN Ling YANG institute of mathematics Fudan University Shanghai 200433 China. Max Planck institute for the mathematics in sciences Inselstr. 22-24 Leibzig 04103 Germany.

Using the convex functions on Grassmannian manifolds, the authors obtain the interior estimates for the mean curvature flow of higher codimension. Confinable properties of Gauss images under the mean curvature flow have been obtained, which reveal that if the Gauss image of the initial submanifold is contained in a certain sublevel set of the v-function, then all the Gauss images of the submanifolds under the mean curvature flow are also contained in the same sublevel set of the v-function. Under such restrictions, curvature estimates in terms of v-function composed with the Gauss map can be carried out.

关键词： Mean curvature flow Convex function Gauss map

LIFE-SPAN OF CLASSICAL SOLUTIONS TO ONE DIMENSIONAL NONLINEAR WAVE EQUATIONS

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Chinese Annals of mathematics,Series B 1992年第3期13卷 266-279页

作者：李大潜俞新周忆 institute of mathematics Fudan UniversityShanghai 200433China. Department of Applied mathematics Tongji UniversityShanghai 200092China.

By means of a simple and direot method,the authors obtain the sharp lower bound ofthe life-span of classioal solutions to the Cauohy problem with small initial data for onedimensional fully nonlinear wave equations ut... 详细信息

关键词： WAVE sharp affine verified 云一岁夕 integer applying desired satisfy

IRRATIONAL ROTATION c-ALGEBRA FOR GROUPOID c-ALGEBRA

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Chinese Annals of mathematics,Series B 1995年第4期16卷 445-452页

作者： CHEN XIAOMAN XU QINGXIANG XU SHENGZHI (institute of mathematics, F’udan university, shanghai 200433, china.) fudan UNIV INST MATHSHANGHAI 200433PEOPLES R CHINA

This paper characterizes the irrational rotaion C-algebra associated with the Toeplitz Calgebraover the L-shaped domain in in the sense of the maximal radical series, which is an isomorphism invariant.

关键词： L-shaped domain Toeplitz C-algebra Irrational rotation Invariant subset Maximal ideal.

Ozone decomposition under the irradiation of 253.7 nm in the presence of methyl bromide

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Journal of Environmental sciences 2000年第3期12卷 266-269页

作者： LI Chao\|min, HOU Jian, YU Yong, HOU Hui\|qi (institute of Environmental Science, fudan university, shanghai 200433, china) institute of Environmental Science Fudan University Shanghai 200433 China

In this paper the mechanism and kinetic of ozone decomposition under the irradiation of 253.7 nm UV\|light were studied. The quantum yield of the ozone depletion in the presence of methyl bromide is further determine... 详细信息

关键词： methyl bromide ozone UV

Identification and Characterization of a Rat Novel Gene RSEP4 Expressed Specifically in Central Nervous System

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Acta Biochimica et Biophysica Sinica 2004年第7期36卷 501-507页

作者： Xi-Dao WANG1,2, Ling-Wei KONG1, Zhi-Qin xie1, Yu-Qiu ZHANG3, Zhi-Xin LIN2, Zhi-Qi ZHAO3,Lei YU4, and Nai-He JING1* 1 Laboratory of Molecular Cell Biology, Laboratory of Stem Cell Biology, institute of Biochemistry and Cell Biology, shanghai institutes for Biological sciences, Chinese Academy of sciences, Graduate school of the Chinese Academy of sciences, shanghai 200031, china school of Life Science and Biotechnology, 2 shanghai Jiaotong university, shanghai 200030, china institute of Neurobiology, fudan university, shanghai 200433, china 3 4 Department of Cell Biology, Neurobiology and Anatomy, College of Medicine, university of Cincinnati, Cincinnati, Ohio, USA Laboratory of Molecular Cell Biology and Stem Cell Biology Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Graduate School of the Chinese Academy of Sciences Shanghai China

The low-abundantly expressed genes composed the majorities of the mRNAs expressed in the central nervous system (CNS), and were thought to be important for the normal brain functions. Through differential screening a low-abundance cDNA sublibrary with mRNA from neuropathic pain of chronic constriction injury (CCI) model, we have identified a novel rat gene, rat spinal-cord expression protein 4 gene (RSEP4). The total length of RSEP4 cDNA is 2006 bp, with a 501 nucleotide open reading frame (ORF) that encodes a 167 amino acid polypeptide. Northern blot revealed that RSEP4 was expressed specifically in the CNS. In situ hybridization showed that the mRNA of RSEP4 was strongly expressed in the CA1, CA2, CA3 and DG regions of hippocampus, the Purkinje cells of cerebellum, and the small sensory neurons of dorsal horn and large motor neurons of ventral horn of spinal cord. Over-expression of RSEP4-EGFP fusion protein in the human embryonic kidney 293T cells showed that RSEP4 protein was mainly localized in the cell cytoplasm. These results suggest that RSEP4 may play some roles in the CNS.

关键词： central nervous system (CNS) rat Northern blot in situ hybridization