检索结果-南通市图书馆

2-对甲氧基苯基-4-苯基-1,5-苯并硫氮杂-α-(N-噁唑烷酮基)-β-内酰胺的反相高效液相色谱法测定

在线全文

学校读者我要写书评

暂无评论

分析测试学报 2003年第3期22卷 92-93页

作者：朱智甲王兰芝李媛河北师范大学实验中心河北石家庄050016 河北师范大学化学系河北石家庄050016

建立了一种测定2_对甲氧基苯基_4_苯基_1 ,5_苯并硫氮杂_α_(N_唑烷酮基 )_β_内酰胺(MPPBOL)的反相高效液相色谱法 ,色谱柱为HypersilODS2(4.6mm×250mm,5μm) ,流动相为CH3CN -CH2Cl2-H2O(体积比70∶0.5∶30) ,检测波长240nm ;MPPBOL在0.1～10mg范围内 ,峰面积与待测物质的质量呈良好的线性关系 ,相关系数为0.9994 ,相对标准偏差3.4 % (m=1.0mg,n=6) ,回收率在97 %～103

关键词： 2-对甲氧基苯基-4-苯基-1,5-苯并硫氮杂Zhuo-α-(N-噁唑烷酮基)-β-内酰胺反相高效液相色谱法测定药理活性

The feature study on the π and proton rapidity distributions at AGS, SPS and RHIC

在线全文

学校读者我要写书评

暂无评论

Science china(Physics,Mechanics & Astronomy) 2009年第2期52卷 198-206页

作者： FENG ShengQin1,2 & YUAN XianBao1,3 1 College of Science, china Three Gorges university, Yichang 443002, china 2 School of Physics and Technology, Wuhan university, Wuhan 430072, china 3 Institute of Particle Physics, Central china normal university, Wuhan 430070, china 1. College of Science China Three Gorges University Yichang 443002 China 2. School of Physics and Technology Wuhan University Wuhan 430072 China 3. Institute of Particle Physics Central China Normal University Wuhan 430070 China

The features of nuclear stopping power and multi-hadron production systematically are studied by making an analysis of rapidity distributions of pion and proton at AGS, SPS and RHIC in this work. It is found that nuclear stopping power increases linearly with project rapidity yp at AGS and SPS, but that is not liner at RHIC. It is argued that the average rapidity loss is saturated at central rapidity region at RHIC. For pion distribution, it is found that the phase space of pion distribution distributes uniformly in the longitudinal direction,and a linear relationship of L with log s is given at AGS and SPS. Non-uniform flow model may explain the features of the distribution at AGS and SPS, but may not ex- plain those of at RHIC.

关键词： non-uniform flow model average rapidity loss baryon number density nuclear stopping power

The resonance Rayleigh scattering of the interaction of copper(Ⅱ)-bleomycinA2 with DNA and its analytical application

在线全文

学校读者我要写书评

暂无评论

Science china Chemistry 2010年第3期53卷 618-624页

作者： LIU JiangTao1,LIU ShaoPu2 & LIU ZhongFang2 1School of Chemistry,Chongqing normal university,Chongqing 400300,china 2School of Chemistry and Chemical Engineering,Southwest university,Chongqing 400715,china School of Chemistry Chongqing Normal University Chongqing China School of Chemistry and Chemical Engineering Southwest University Chongqing China

The forming of bleomycinA2-Cu(Ⅱ) cationic chelate and the interaction of the chelate with DNA have been investigated by using resonance Rayleigh scattering(RRS),molecular absorption and fluorescence *** result shows that in aqueous solution,bleomycinA2(BLMA2) can react with Cu(Ⅱ) to form 1:1 cationic chelate which contributes to the changes of the absorption spectra and the quenched fluorescence of *** the cationic chelate further bound with DNA to form ternary ion-association complexes,the remarkable enhancement of the RRS intensity was *** this work,the optimum conditions for the coordination reaction of BLMA2 with Cu(Ⅱ) and some influencing factors have been *** reaction mechanism of BLMA2-Cu(Ⅱ) binding with DNA was suggested and a binding model was *** addition,the fluorescence quenching type of BLMA2 was investigated.A highly sensitive,simple and rapid new method for the determination of DNA by using BLMA2-Cu(Ⅱ) as RRS probe has been *** detection limits(3σ) are 7.2 ng/mL for ctDNA,7.1 ng/mL for sDNA and 18 ng/mL for *** method can be applied to the determination of trace amounts of DNA.

关键词： bleomycinA2 Cu(Ⅱ) DNA resonance Rayleigh scattering fluorescence quenching

ON THE VARIATIONS OF G_2

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2003年第3期24卷 387-394页

作者： LIU DONG LIN LEI Department of Mathematics, East china normal university, Shanghai 200062, china. Department of Mathematics, East china normal university, Shanghai 200062, china. Department of Mathematics East China Normal University Shanghai 200062 China

In [1], Shen Guangyu constructed several classes of new simple Lie algebras of characteristic 2, which are called the variations of G2. In this paper, the authors investigate their derivation algebras. It is shown that G2 and its variations all possess unique nondegenerate associative forms. The authors also find some nonsingular derivations of ViG for i = 3,4, 5, 6, and thereby construct some left-symmetric structures on Vi G for i = 3,4,5,6. Some errors about the variations of sl(3, F) in [1] are corrected.

关键词： Variation Derivation Associative form Left-symmetric structure

Automatic generalization of metro maps based on dynamic segmentation

在线全文

学校读者我要写书评

暂无评论

Science china(Technological Sciences) 2010年第S1期53卷 158-165页

作者： DONG WeiHua 1,TIAN Yuan 2 & ZHANG Yi 2 1 Institute of Geography and Remote Sensing,Beijing normal university,Beijing 100875,china 2 Institute of Remote Sensing and Geographic Information System,Peking university,Beijing 100871,china 1. Institute of Geography and Remote Sensing Beijing Normal University Beijing 100875 China 2. Institute of Remote Sensing and Geographic Information System Peking University Beijing 100871 China

A metro map is usually optimized for the readability of connections and transportation networks *** order to assure good readability and meet aesthetic considerations,a set of principles for good metro map layout are *** to these principles,a new methodology based on dynamic segmentation is presented to produce the metro maps ***,routes are constructed according to the line attribute similarity and geometry *** a set of cartographic generalization methods about the shape,angle,length,and topology are presented for these *** method is validated by Beijing metro plan *** the experiment results,it can be concluded that this new method is more effective than the static segmentation method to produce metro maps with better readability for route plans.

关键词： metro maps generalization dynamic segmentation visualization

Lepton flavor violating Z-boson decays at GigaZ as a probe of supersymmetry

在线全文

学校读者我要写书评

暂无评论

Science china(Physics,Mechanics & Astronomy) 2010年第11期53卷 1949-1952页

作者： YANG JinMin 1,2 1 Department of Physics,Henan normal university,Xinxiang 453007,china 2 Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,china 1. Department of Physics Henan Normal University Xinxiang 453007 China2. Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China

This paper briefly reviews the lepton flavor violating Z-decays at GigaZ as a probe of supersymmetry by focusing on Z → i j in two representative supersymmetric models: the minimal supersymmetric model without R-parity and the supersymmetric seesaw *** work concludes that under the current experimental constraints from LEP and i → j γ,these rare decays can still be enhanced to reach the sensitivity of the ***,supersymmetry can be probed via these decays at GigaZ.

关键词： Z-decay GigaZ supersymmetry

CATALYTIC BEHAVIOR OF HYDROTALCITE-LIKE COMPOUND IN NITROGEN MONOXIDE REDUCTION BY CO

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 1997年第6期 6-7页

作者： Wang Xuezhong1, Liu Yumin2, Wu Yue1*(1 Changchun Institute of Applied Chemistry, The Chinese Academy of Sciences, Changchun 130022 2 hebei Science and Technology university, shijiazhuang 050019)

ＣＡＴＡＬＹＴＩＣＢＥＨＡＶＩＯＲＯＦＨＹＤＲＯＴＡＬＣＩＴＥＬＩＫＥＣＯＭＰＯＵＮＤＩＮＮＩＴＲＯＧＥＮＭＯＮＯＸＩＤＥＲＥＤＵＣＴＩＯＮＢＹＣＯＷａｎｇＸｕｅｚｈｏｎｇ１，ＬｉｕＹｕｍｉｎ２，ＷｕＹｕｅ１（１... 详细信息

ＣＡＴＡＬＹＴＩＣＢＥＨＡＶＩＯＲＯＦＨＹＤＲＯＴＡＬＣＩＴＥＬＩＫＥＣＯＭＰＯＵＮＤＩＮＮＩＴＲＯＧＥＮＭＯＮＯＸＩＤＥＲＥＤＵＣＴＩＯＮＢＹＣＯＷａｎｇＸｕｅｚｈｏｎｇ１，ＬｉｕＹｕｍｉｎ２，ＷｕＹｕｅ１（１ＣｈａｎｇｃｈｕｎＩｎｓｔｉｔｕｔ...

关键词： Nitrogen monoxide Carbon monoxide Reduction Hydrotalcitelike compound

Codimension 3 nonresonant bifurcations of homoclinic orbits with two inclination flips

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science china Mathematics 2005年第2期48卷 248-260页

作者： SHUI Shuliang & ZHU Deming College of Mathematics and Physics, Zhejiang normal university, Jinhua 321004, china Department of Mathematics, East china normal university, Shanghai 200062, china 1. College of Mathematics and Physics Zhejiang Normal University 321004 Jinhua China 2. Department of Mathematics East China Normal University 200062 Shanghai China

Homoclinic bifurcations in four-dimensional vector fields are investigated by setting up a local coordinate near a homoclinic orbit. This homoclinic orbit is principal but its stable and unstable foliations take inclination flip. The existence, nonexistence, and uniqueness of the 1-homoclinic orbit and 1-periodic orbit are studied. The existence of the two-fold 1-periodic orbit and three-fold 1 -periodic orbit are also obtained. It is indicated that the number of periodic orbits bifurcated from this kind of homoclinic orbits depends heavily on the strength of the inclination flip.

关键词： bifurcation, homoclinic orbit, non-resonance, inclination flip, 1-periodic orbit.

Extension of isometries on the unit sphere of l^p (Γ) space

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2010年第4期53卷 1085-1096页

作者： FANG XiNian 1,& WANG JianHua 2 1 School of Mathematics and Statistics,Nanjing Audit university,Nanjing 210029,china 2 Department of Mathematics,Anhui normal university,Wuhu 241000,china 1. School of Mathematics and Statistics Nanjing Audit University Nanjing 210029 China2. Department of Mathematics Anhui Normal University Wuhu 241000 China

In this paper,we obtain that every isometry from the unit sphere S(l p (Γ)) of l p (Γ) (1 < p < ∞,p≠2) onto the unit sphere S(E) of a Banach space E can be extended to be a (real) linear isometry of l p (Γ) onto ... 详细信息

In this paper,we obtain that every isometry from the unit sphere S(l p (Γ)) of l p (Γ) (1 2) onto the unit sphere S(E) of a Banach space E can be extended to be a (real) linear isometry of l p (Γ) onto E,so,we give an affirmative answer to the corresponding Tingley’s problem.

关键词： isometric extension l p (Γ) space isometry 1-Lipschitz mapping