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science china chemistry 2009年第11期52卷 2006-2012页

作者： WANG YanHuai,LI Jing,LIU Yan,MA RongNa,JIA WenLi,CUI Hui & WANG HuaiSheng College of chemistry and chemical engineering,Institute of analytical chemistry,Liaocheng university,Liaocheng 252059,china College of chemistry and chemical engineering Institute of Analytical Chemistry Liaocheng University Liaocheng China

A composite film of DNA/poly(3-methylthiophene)(P3MT) modified glassy carbon electrode(GCE) has been fabricated by electro-deposition method.P3MT film was first electropolymerized at the GCE and the DNA layer was then immobilized on the P3MT layer by electrochemical *** voltammetric behavior of 8-hydroxy-2'-deoxyguanosine(8-OH-dG) at the composite film modified electrode was *** effects of scan rates,pH and the interference of uric acid(UA) on the voltammetric behavior and detection of 8-OH-dG were also *** experimental results suggest that the electrochemical behavior of 8-OH-dG at the composite film modified electrode was greatly improved due to the combination of the advantages of P3MT and *** 0.1 M pH 7.0 phosphate buffer solution(PBS),the anodic peak currents of 8-OH-dG were linear with the 8-OH-dG concentration in two intervals,viz.0.28―4.2 μM and 4.2―19.6 μ*** detection limit of 56 nM 8-OH-dG could be estimated(S/N=3).This proposed composite film modified electrode shows excellent reproducibility and *** may have the potential application for the detection of 8-OH-dG in human urine.

关键词： poly(3-methylthiophene) DNA 8-hydroxy-2’-deoxyguanosine composite film modified electrode

Molecular dynamics simulation study on zwitterionic structure to maintain the normal conformations of Glutathione

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science china chemistry 2007年第5期50卷 660-664页

作者： YAN Han1, ZHU HaoMiao2 & SHEN Jian1,2 1 Jiangsu Research Center of Surface and Interface chemical engineering and Technology, nanjing university, nanjing 210093, china 2 Jiangsu engineering Research Center for Bio-medical function Materials, nanjing Normal university, nanjing 210097, china Jiangsu Research Center of Surface and Interface chemical engineering and Technology Nanjing University Nanjing China Jiangsu engineering Research Center for Bio-medical function Materials Nanjing Normal University Nanjing China

Molecular dynamics simulations were applied to normal conformational Glutathione (GSH) and GSH over zwitterionic and hydrophobic surfaces respectively. Conformational analysis of GSH during the simulation time on RMSD, conformational flexibility and dihedral distribution were performed. The re- sults showed that zwitterionic structure maintains the normal conformations of GSH to a better extent, which should be a first good proof of the hypothesis of "maintain of normal structure".

关键词： protein-surface interactions, molecular dynamics simulation, zwitterionic structure, Glutathione, conformational changes, antithrombotic material

A simple solution route to control synthesis of Fe_3O_4 nanomaterials at low temperature and their magnetic properties

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science china chemistry 2009年第7期52卷 916-923页

作者： LIU Yi1,2, CHEN Yun1, ZENG YuPing2 & WANG ShiLong3 1 Department of chemistry and chemical engineering, Zaozhuang university, Zaozhuang 277160, china 2 Shanghai Institute of Ceramics, Chinese Academy of sciences, Shanghai 200050, china 3 school of life science and Technology, Tongji university, Shanghai 200092, china Department of chemistry and chemical engineering Zaozhuang University Zaozhuang China Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China school of life science and Technology Tongji University Shanghai China

A series of nanostructured iron compounds including cubic Fe3O4 and orthorhombic FeOOH were synthesized via a facile low temperature (in the range of 60-100℃) solution method. In the whole process, the interaction between FeCl2·4H2O and methenamine (C6H12N4) was carried out through a reflux device under different reaction conditions such as temperature, solvent, and duration. The samples were detected by XRD, TEM, SAED, physical property measurement system, and Mssbauer spectroscopy, separately. The experiments showed that magnetic mixture nanoparticles had flake and rod morphologies, and cubic Fe3O4 took on grain nanostructure. Magnetism measurements indicated that the saturated magnetization of the as-obtained magnetic mixture was lower than that of the cubic magnetite. Mssbauer spectroscopy testified the sample consisting of cubic magnetite rather than γ-Fe2O3. In addition, a possible growth mechanism of cubic magnetic nanoparticles under different conditions was discussed.

关键词： magnetic nanoparticles cubic Fe3O4 oxidation-coprecipitation method reflux magnetic properties at room temperature Mssbauer spectrum

Theoretical Study on the Reaction Mechanism of F2+2HBr = 2HF+Br2

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Chinese Journal of Structural chemistry 2005年第11期 110-115+12页

作者： SUN De-Shenga, b WANG Zun-Yaob YANG Chun-Shengb a (school of chemistry and chemical engineering, nanjing university of Technology, Jiangsu, nanjing 210009, china) b(Department of chemical engineering, Yancheng Institute of Technology, Jiangsu, Yancheng 224003, china)

The gas phase reaction mechanism of F2 + 2HBr = 2HF + Br2 has been investigated by (U)MP2 at 6-311G** level, and a series of four-center and three-center transition states have been obtained. The reaction mechanism was achieved by comparing the activation energy of seven reaction paths, i.e. the dissociation energy of F2 is less than the activation energy of the bimolecular elementary reaction F2 + HBr → HF + BrF. Thus it is theoretically proved that the title reaction occurs more easily in the free radical reaction with three medium steps.

关键词： (U)MP2 transition state reaction mechanism free radical reaction.

Mathematic Expression of Kinetic Compensation Effect and Relationship between the Exothermic Decomposition Temperature and Critical Temperature of Thermal Explosion of Eighty-six Energetic Materials

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含能材料 2001年第1期9卷 8-9页

作者： HU Rong zu 1, YANG De suo 2, ZHANG Jiao qiang 3 (1. Department of chemistry,Northwest university, Xi′an 710065, china 2. Department of chemistry and chemical engineering, Baoji College of Arts and science, Baoji 721007, china 3. Department of 西北大学陕西西安 710065 宝鸡文理学院陕西 721007 西北工业大学陕西西安 710072

Two relationships are established using the least squares method,between the kinetic parameters (the apparent activation energy and pre exponential constant),and the exothermic decomposition temperature and ther... 详细信息

关键词： critical temperature of thermal explosion decomposition temperature DSC energetic materials.

MORPHOLOGY AND PROPERTIES OF LINEAR LOW-DENSITY POLYETHYLENE HIGHLY LOADED WITH ALUMINUM HYDROXIDE

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Chinese Journal of Polymer science 2002年第3期20卷 253-259页

作者： Gen-lin Wang Ping-kai Jiang Zi-kang Zhu Jie Yin school of chemistry and chemical engineering Shanghai Jiaotong university Shanghai 200240 china school of chemistry and chemical engineering Shanghai Jiaotong University 上海 200240

An experimental study was carried out to investigate the effects of isopropoxy tri(dioctyl pyrophosphoryl) titanate coupling agent on the mechanical performance, rheological property and microstructures of polyethylene highly loaded with aluminum hydroxide (Al(OH)(3)) composite, It was found that the addition of coupling agent results in reduced tensile strength and increased percentage elongation of the filled systems. Silane crosslinkable polyethylene substituting for polyethylene as matrix improves the tensile strength of the composite, while the percentage elongation of the composite still remains at a desired level. Melt viscosity of the composite will be improved by addition of titanate coupling agent. Microstructures of the composites were also studied by means of the scanning electron microscopy (SEM) technique. SEM micrographs reveal that finer dispersion of Al(OH)(3) will be obtained upon treatment of titanate and a transition from brittle to tough fracture takes place before and after silane crosslinking structure is introduced into polyethylene highly filled with Al(OH)(3) composite.

关键词： polyethylene aluminum hydroxide organic titanate silane crosslink

Resolution of α-cyclohexyl-mandelic acid enantiomers by two-phase (O/W) recognition chiral extraction

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science china chemistry 2007年第6期50卷 764-769页

作者： TANG KeWen1,2, ZHANG GuoLi2, HUANG KeLong2, LI Yuanjian3 & YI JianMin1,2 1 Department of chemistry and chemical engineering, Hunan Institute of science and Technology, Yueyang 414000, china 2 College of chemistry and chemical engineering, Central South university, Changsha 410083, china 3 College of Pharmaceutical science, Central South university, Changsha 410078, china Department of chemistry and chemical engineering Hunan Institute of Science and Technology Yueyang China College of chemistry and chemical engineering Central South University Changsha China College of Pharmaceutical science Central South University Changsha China

This paper presents a new chiral separation technology:two-phase(O/W)recognition chiral *** behavior of alpha-cyclohexyl-mandelic acid enantiomers was studied in the extraction system with D(L)-isobutyl tartrate in 1,2-dichloroethane organic phase and beta-CD derivatives in aqueous phase,and the influence of the kind and concentration of extractant and pH on extraction performance was *** experimental results indicate that two-phase(O/W)recognition chiral extraction is of strong chiral separation ***-^-CD,HE-beta-CD and Me-beta-CD have higher recognition ability for S-CHMA than that for R-CHMA,among which HP-beta-CD has the strongest ability;whereas,D-isobutyl tartrate has reversed recognition ability for *** the extraction system containing HP-beta-CD and D-isobutyl tartrate,e.e.% of S-CHMA in aqueous phase reached 27.6% by one stage extraction,and the distribution ratio for R-CHMA(k_R)and for S-CHMA(k_S)and separation factor(alpha)are 2.44,0.89 and 2.49,***,pH and concentration of extractant have great effects on chiral separation ***-phase(O/W)recognition chiral extraction has great significance for preparative separation of racemic compounds.

关键词： two-phase(W/0)recognition chiral extraction alpha-cyclohexyl-mandelic acid enantiomers

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

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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

A simple solvothermal route towards the morphological control of ZnO and tuning of its optical and photocatalytic properties

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science china chemistry 2010年第8期53卷 1711-1717页

作者： JIANG YaQi,LI FangFang,SUN Ran,XIE ZhaoXiong & ZHENG LanSun State Key laboratory for Physical chemistry of Solid Surfaces Department of chemistry,College of chemistry and chemical engineering,Xiamen university,Xiamen 361005,china State Key laboratory for Physical chemistry of Solid Surfaces Department of chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen China

ZnO nanoparticles with different morphologies were solvothermally synthesized by controlling the alkali (sodium hydroxide) concentration in an isopropanol *** products were characterized by means of powder X-ray diffraction,UV-visible absorption spectra,scanning electron microscopy,transmission electron microscopy,and selected area electron *** morphologies of the formed ZnO nanocrystals were dependent on the concentration of the alkali,and with increases of sodium hydroxide concentration,the ZnO nanocrystals evolved from rod to hexagonal bipyramid,and then to a flower-like *** flower-like nanostructure resulted from the etching of the hexagonal bipyramid by the excess *** photoluminescence and photocatalytic properties of the prepared ZnO were *** difference of green emission among the ZnO nanocrystals indicated that a higher sodium hydroxide concentration led to a higher level of *** size,the surface structure and defects in the ZnO nanocrystals affected its photo-degradation characteristics.

关键词： zinc oxide solvothermal method nanocrystal photoluminescence photocatalysis

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基因兴奋剂检测的现状与策略

色谱 2008年第4期26卷 402-407页

作者：何坚刚刘震刘晶窦鹏陈洪渊南京大学化学化工学院教育部生命分析化学重点实验室江苏南京210093

本文综述了基因兴奋剂检测的现状和反基因兴奋剂的策略。归纳了可能被运动员滥用的基因兴奋剂,分析了由这些基因表达的促红细胞生成素(EPO)、人生长激素(hGH)等蛋白的检测进展,讨论了未来检测基因兴奋剂的可能策略。

关键词：基因兴奋剂重组蛋白检测综述