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THE VErTICAL BELTS OF NATUrAL VEGETATION pArTITIONING OF THE GUANDI MOUNTAINS BY USING OrDErED pLOT CLUSTErING,shanxi,NOrTH china

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植物研究 1997年第4期17卷 95+101+105+109+97+10-95+101+105+109+97+10页

作者： Feng Zhang 1 Tieliang Shang-guan 1 Anders Telenius 2(1. department of Life Science, shanxi university, Taiyuan 030006, p. r. china) (2. department of Botany, university of Stockholm, S-106 91 Stockholm, Sweden) 山西大学生命科学系山西太原 university of Stockholm 瑞典

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关键词： Ordered plot clustering TWINSpAN Non-hierarchical agglomerative algorithm Vertical belt of natural vegetation Gold partitioning method Guandi Mountains shanxi

Systemic Acquired resistance and Signal Transduction in plant

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Agricultural Sciences in china 2003年第5期2卷 539-548页

作者： ZHAO Shu-qing and GUO Jian-boLaboratory of Biotechnology , shanxi university , Taiyuan 030006 ,p. r. china Laboratory of Biotechnology Shanxi University Taiyuan 030006P. R. China

Systemic acquired resistance (SAr), known as the broad-spectrum, inducible plant immunity, is a defense response triggered by pathogen infection. The response starts from the recognition of plant resistance (r) with the corresponding avirulence (avr) gene from the pathogen. There are some genes for convergence of signals downstream of different r/avr interacting partners into a single signaling pathway. Salicylic acid (SA) is required for the induction of SAr and involved in transducing the signal in target tissues. The SA signal is transduced through Npr1, a nuclear-localized protein that interacts with transcription factors that are involved in regulating SA-mediated gene expression. Some chemicals that mimic natural signaling compounds can also activate SAr. The application of biochemical activators to agriculture for plant protection is a novel idea for developing green chemical pesticide.

关键词： Systemic acquired resistance Signal transduction Salicylic acid. Activators Broad-spectrum disease resistance

A Hierarchy of Multidimensional Hénon-Heiles Systems

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Acta Mathematica Sinica,English Series 2000年第3期16卷 527-534页

作者： Yunbo Zeng department of Mathematical Sciences,Tsinghua university,Beijing 100084 p.r.china department of Mathematical Sciences Tsinghua University Bejing 100084 P. R. China

A hierarchy of multidimensional Hénon-Heiles(M-H-H)systems are constructed via the x-and t_n-higher-order-constrained flows of KdV *** Lax representation for the M-H-H hierarchy is determined from the adjoint representation of the auxiliary linear problem for the KdV *** using the Lax representation the classical poisson structure and r-matrix for the hierarchy are found and the Jacobi inversion problem for the hierarchy is constructed.

关键词： Higher-order constrained flow Multidimensional Hénon-Heiles systems Lax representation Jacobi inversion problem

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.

K-Functional, Weighted Moduli of Smoothness, and Best Weighted polynomial Approximation on a Simplex

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Acta Mathematica Sinica,English Series 1999年第3期15卷 395-403,405-406页

作者： Song Li department of mathematics, Zhejiang university, Hangzhou 310027, p. r. china department of mathematics Zhejiang University Hangzhou P. R. China

An inverse theorem for the best weighted polynomial approximation of a function in Lwαp（S） is established. We also investigate Besov spaces generated by Freud weight and their connection with algebraic polynomial a... 详细信息

An inverse theorem for the best weighted polynomial approximation of a function in Lwαp>pp>（S） is established. We also investigate Besov spaces generated by Freud weight and their connection with algebraic polynomial approximation in Lp（r）wλ, where wα is a Jacobi-type weight on S, 0p≤∞, S is a simplex and Wλ is a Freud weight. For Ditzian-Totik K-functionals on Lp（S）, 1≤p≤∞, we obtain a new equivalence expression.

关键词： Weighted moduli of smoothness K-functional Best weighted polynomial approximation Simplex

On a Diophantine Inequality Involving prime Numbers (Ⅲ)

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Acta Mathematica Sinica,English Series 1999年第3期15卷 387-394页

作者： Yingchun Cai department of mathematics, Shanghai university, Shanghai 201800, p. r. china department of mathematics Shanghai University Shanghai P. R. China

Let 10 such that for each real number N>N（c） the inequality |p1c+p2c+p3c-N|-（1/c）（11/10-c）logc1 N is solvable in prime numbers p1, p2, p3, where c1 is some absolute positive constant.

Let 1present paper it is proved that there exists a number N（c）>0 such that for each real number N>N（c） the inequality |p1p>cp>+p2p>cp>+p3p>cp>-N|p>-（1/c）（11/10-c）p>logp>c1p> N is solvable in prime numbers p1, p2, p3, where c1 is some absolute positive constant.

关键词： prime Inequality Exponential sum

On Holomorphic Automorphisms of a Class of Non-homogeneous rigid Hypersurfaces in C^(N+1)

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Chinese Annals of mathematics,Series B 2010年第2期31卷 201-210页

作者： Qingyan WU department of mathematics,Linyi Normal university,Linyi 276005,Shandong,china department of mathematics,Zhejiang university,Hangzhou 310027,china department of mathematics Linyi Normal University Linyi 276005 Shandong China department of mathematics Zhejiang University Hangzhou 310027 China

The author determines the real-analytic infinitesimal Cr automorphisms of a class of non-homogeneous rigid hypersurfaces in CN+1 near the origin,and the connected component containing the identity transformation of al... 详细信息

关键词： real-analytic infinitesimal Cr automorphisms rigid hypersurfaces Holomorphic automorphisms

Spectral radius of Non-negative Matrices and Digraphs

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Acta Mathematica Sinica,English Series 2002年第2期18卷 293-300页

作者： ZHANG Xiao Dong department of mathematics.East china Normal university,Shanghai 200062.p.r.china E-mail:xdzhang2@hotmail.comLI Jiong Sheng department of mathematics.university of Science and Technology of china,Hefei 230026,p.r.china department of mathematics East China Normal University Shanghai P. R. China department of mathematics University of Science and Technology of China Hefei P. R. China

We present,an upper and a lower bound for the spectral radius of non-negative matrices. Then we give the bounds for the spectral radius of digraphs.

关键词： Non-negative matrix Digraph Spectral radius

La^(3+) Transmembrane research in Guinea pig Ventricular Cells by Fura-2 Fluorescence

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Chinese Chemical Letters 2000年第8期11卷 725-726页

作者： rong CHEN, pin YANG, Chun Ying WEI (Institute of Molecular Science, shanxi university. Taiyuan 030006) shanxi Univ Inst Mol Sci Taiyuan 030006 Peoples R China

Binding of La3+ to Fura-2 can change 340/380 nm fluorescence intensity ratio. Whether La3+ cross ventricular cell membrane was detected by this fluorescent probe technique. Fura-2 loaded isolated guinea pig ventricular cells were exposed to 0.01-0.1 mM extracellular Lanthanum ion concentration, 340nm/380 nm fluorescence ratio was not changed. Using calcium channel agonist BAY K8644, KCL (35mM) depolarization to open the voltage-dependent calcium channel (VDCC); Adrenoceptor agonist to excite adrenoceptor, 340/380 ratio was not changed, suggesting that La3+can not enter guinea pig ventricular cells in this case.

关键词： Ventricular cells adrenaline La3+ transmembrane Fura-2 BAY K8644.