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侵染人参果的马铃薯M病毒基因组全序列分析

微生物学报 2003年第3期43卷 336-341页

作者：郑红英陈炯陈剑平浙江省农业科学院病毒学与生物技术研究所

测定了侵染人参果的马铃薯M病毒 (PVM Ch)基因组全序列。线状、单链正义RNA全长 852 6bp ,含 6个开读框 (ORF) ,具麝香石竹潜隐病毒属 (GenusCarlavirus)典型结构特征。序列比较表明它与其他PVM分离物各基因核苷酸和编码蛋白氨基酸序列... 详细信息

测定了侵染人参果的马铃薯M病毒 (PVM Ch)基因组全序列。线状、单链正义RNA全长 852 6bp ,含 6个开读框 (ORF) ,具麝香石竹潜隐病毒属 (GenusCarlavirus)典型结构特征。序列比较表明它与其他PVM分离物各基因核苷酸和编码蛋白氨基酸序列同源性分别为62 5 %～ 97 2 %和 60 9%～ 97 4% ,其中CP基因最保守 ,而TGB3基因变异最大。系统进化树分析表明美国爱达荷州马铃薯分离物 (PVM Id) (AF0 2 3877)为PVM的一个远缘株系 ,而其他 4个PVM分离物的成簇在外壳蛋白 (Coatprotein ,CP)和核酸结合蛋白 (Nucleicacidbindingpro tein ,NABP)区域略有差异。这是PVM在人参果上侵染的首次报道。

关键词：侵染人参果序列分析马铃薯M病毒基因系统进化树基因组结构

Progress and prospects of studies on Polymyxa graminis and its transmitted cereal viruses in china

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Progress in Natural Science:Materials International 2005年第6期15卷 481-490页

作者： CHEN Jianping*(virology and Biotechnology Institute, zhejiang academy of agricultural sciences, Key Laboratory of Plant virology, Ministry of Agriculture and zhejiang Province, hangzhou 310021, china) virology and Biotechnology Institute Zhejiang Academy of Agricultural Sciences Key Laboratory of Plant Virology Ministry of Agri- culture and Zhejiang Province Hangzhou 310021 China

Polymyxa graminis is a eukaryotic obligate biotrophic parasite of plant roots that belongs to a poorly studied discrete taxonomic unit informally called “plasmodiophorids”. P. graminis is nonpathogenic, but has the ability to acquire and transmit nine plant viruses which belong to genera Bymovirus and Furovirus and cause serious diseases in cereal crop species and also result in significant yield reductions in china and elsewhere. Genus Bymovirus contains barley yellow mosaic virus (BaYMV), barley mild mosaic virus (BaMMV), wheat yellow mosaic virus (WYMV), wheat spindle streak mosaic virus (WSSMV), and oat mosaic virus (OMV), and genus Furovirus contains soil-borne wheat mosaic virus (SBWMV), oat golden stripe virus (OGSV), and newly identified Chinese wheat mosaic virus (CWMV) and soil-borne cereal mosaic virus (SBCMV). All these viruses have been sequenced and their worldwide distributions have been studied. The viruses are protected by the environment within P. graminis resting spores that may remain dormant but viable for decades (probably until a suitable host plant is encountered). Spontaneous deletion mutants of SBWMV, OGSV and OMV are detected, and these deletion mutants are not transmissible by the fungus. The persistent, soil-borne nature of these diseases makes the use of virus-resistant crop varieties currently the only practical and environmentally friendly means to control them, and a large number of disease resistant germplasms have been screened.

关键词： Polymyxa graminis cereal viruses genus Bymovirus genus Furovirus.

Line bundles on non-primary Hopf manifolds

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Science china Mathematics 2004年第4期47卷 538-551页

作者： LIU Weiming & ZHOU XiangyuInstitute of Mathematics, academy of Mathematics and System sciences, Chinese academy of sciences, Beijing 100080, china department of Mathematics, zhejiang University, hangzhou 310028, china 1. Institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences 100080 Beijing China 2. department of Mathematics Zhejiang University 310028 Hangzhou China

Let X be a Hopf manifolds with Abelian fundamental group, L any flat line bundle on X, we give a formula for computing explicitly the cohomology Hq(X, Ωp(L) using the method of group action and the generalized Douady... 详细信息

关键词： Hopf surface, cohomology, line bundle, sections.

Boundedness of a class of super singular integral operators and the associated commutators

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Science china Mathematics 2004年第6期47卷 842-853页

作者： CHEN Qionglei & ZHANG Zhifei department of Mathematics, zhejiang University, hangzhou 310028, china academy of Mathematics and System sciences, Chinese academy of sciences, Beijing 100080, china 1. department of Mathematics Zhejiang University 310028 Hangzhou China 2. academy of Mathematics and System sciences Chinese Academy of Sciences 100080 Beijing China

In this paper we give the (L p α, L p ) boundedness of the maximal operator of a class of super singular integrals defined by $$T_{\Omega ,\alpha }^* f(x) = \mathop {\sup }\limits_{\varepsilon > 0} \left| {\int_{|x - y| > \varepsilon } {b(|y|)} \Omega (y)|y|^{ - n - \alpha } f(x - y)dy} \right|,$$ which improves and extends the known result. Moreover, by applying an off-Diagonal T1 Theorem, we also obtain the (L p , L q ) boundedness of the commutator defined by $$C_{\Omega ,\alpha } f(x) = p.v. \int_{\mathbb{R}^n } {(A(x)} - A(y))\Omega (x - y)|x - y|^{ - n - \alpha } f(y)dy.$$

关键词： singular integral operator maximal operator commutator T1 Theorem

POLYMERIZATION OF p-DIETHYNYLBENZENE INITIATED BY Ni(C≡CC_6H_4C≡CH)_2(PPH_3)_2

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Chinese Journal of Polymer Science 2001年第3期19卷 303-309页

作者： Mu-jie Yang Xiao-wei Zhan department of Polymer Science and Engineering zhejiang University hangzhou 310027, china Present address: Institute of Chemistry, Chinese academy of sciences, Beijing 100080, china 浙江大学浙江杭州

Homogeneous polymerization of p-diethynylbenzene initiated by nickel acetylide Ni(C ≡ C C_6H_4 C ≡ CH)_2(PPh_3)_2has been investigated in terms of different solvents, addition agents, atmosphere gases, catalyst concentrations, monomerconcentrations and polymerization temperatures. The yield and catalytic efficiency approach 88% and 11. 1 kg polymer/molNi, respectively, under the optimum conditions: [cat] = 0.01 mol/L, [M] = 1.0 mol/L, NEt_3/cat (mol ratio) = 3～5, 1,4-dioxane/toluene (volume ratio) = 1 and T = 25℃ for 5 h. The polymerization rate equation can be expressed as R_p =k_p[M][cat]~2, where k_p= 0.47 L^2. mol^(-2)·S^(-1) (25℃). The overall polymerization activation energy was found to be203 kJ·mol^(-1). Poly(p-diethynylbenzene) so obtained is soluble in THF, CHCl_3 and toluene with weight-average molecularweights as high as 27, 100 and a rich-trans extended π-conjugated polyene chain structure with pendent groups ofp-C_6H_4C≡CH.

关键词： Polymerization p-Diethynylbenzene Nickel acetylide Catalyst

Local and global behavior for algorithms of solving equations

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Chinese Science Bulletin 2001年第6期46卷 441-448,529页

作者： WANG Xinghua & LI Chongdepartment of Mathematics, zhejiang University, hangzhou 310028, china academy of Mathematics and System sciences, Chinese academy of sciences, Beijing 100080, china department of Applied Mathematics, Southeast University, Nanjing 210096, china department of Mathematics Zhejiang University Hangzhou China academy of Mathematics and System sciences Chinese Academy of Sciences Beijing China department of Applied Mathematics Southeast University Nanjing China

The theory of 'point estimate' and the concept of 'general convergence', which were put forward by Smale in order to investigate the complexity of algorithms for solving equations, have been producing a deep impact on the research about the local behavior, the semi-local behavior and the global behavior of iteration methods. The criterion of point estimate introduced by him not only provides a tool for quantitative analysis of the local behavior but also motivates the establishing of the unified determination for the semi-local behavior. Studying the global behavior in the view of discrete dynamical system will lead to many profound research subjects and open up a rich and colorful prospect. In this review, we will make a summarization about the research progress and some applications in nonsmooth optimizations.

关键词： Banach space nonlinear operator equation point esti-mate Sullivan domain nonsmooth optimization.

Energy functionals and killing transform

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Chinese Science Bulletin 1997年第19期42卷 1593-1596页

作者： YING Jiangangdepartment of Mathematics, zhejiang University, hangzhou 310027, china Istitute of Applied Mathematics, Chinese academy of sciences, Beijing 100080, china department of Mathematics Zhejiang University Hangzhou China Istitute of Applied Mathematics Chinese Academy of Sciences Beijing China

LET X=（Xt,Px） be a right Markov process with state space （E,ε）, semigroup （P1） andresolvent （Uq）. As in ref.[1, 2], we denote by Excq（X ）, Disq（X） and Conq（X） thecones of excessive, dissipative, conservative measures of X, respectively, and by Sq（X） thecone of excessive functions of X. By convention we drop the superscript q when it is zero. LetMF be the set of all exact multiplicative functional of X. For any given M∈MF, writeEM:= {x∈E:PM0 = 1 = 1} and SM: = inf} t>0: M1= 0 } for the set of

关键词： right processes multiplicative functionals Revuz measures energy functional capacity.

Inheritance of semidwarfism in Oryza sativa ***

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Rice Science 1991年第3期 2-3页

作者： XU Jianlong SHEN Zongtan Agronomy department,zhejiang agricultural University,hangzhou 310029,china LIN Yizi Institute of Crop Breeding and Cultivation,zhejiang academy of agricultural sciences,hangzhou 310021,china

It had been reported that Xuehe'aizao（XHAZ）,a mutant coming from Yunnan,hadsdsgene nonallelic to ***,in crosses withboth tall and semidwarf varieties,all F1plantsshowed super-tall and a large number ofsuper-tall pla... 详细信息

关键词： Inheritance of semidwarfism in Oryza sativa L.ssp.japonica

Cloning and Alternative Splicing Analysis of Bombyx mori Transformer-2 Gene using Silkworm EST Database

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Acta Biochimica et Biophysica Sinica 2005年第11期37卷 728-736页

作者： Bao-Long NIU Zhi-Qi MENG Yue-Zhi TAO Shun-Lin LU Hong-Biao WENG Li-Hua HE Wei-Feng SHEN Sericultural Research Institute,zhejiang academy of agricultural sciences,hangzhou 310021,china department of Sericulture and Apiculture,College of Animal sciences,zhejiang University,hangzhou 310029,china SericulturalResearchInstitute ZhejiangAcademyofAgriculturalSciencesHangzhou310021China

We have identified Bombyx mori transformer-2 gene(Bmtra-2)cDNA by blasting the ESTdatabase of *** was expressed in the whole life of the male and female silkworm and was observed asa band of 1.3 kb by Northern blot *** comparing corresponding ESTs to the Bmtra-2 DNA sequence,it was revealed that there were eight exons and seven introns,and all splice sites of exons/introns conformedto the GT/AG ***-2 pre-mRNA can produce multiple mRNAs encoding six distinct isoforms ofBmTRA-2 protein using an alternative splicing pathway during *** types of Bmtra-2 cDNAclones were identified by reverse transcription-polymerase chain *** isoforms of BmTRA-2 proteincontain two arginine/serine-rich domains and one RNA recognition motif,showing striking organizationalsimilarity to Drosophila TRA-2 proteins.

关键词： EST database transformer-2 gene Bmtra-2 alternative splicing gene clone Bombyxmori