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Chinese chemical Letters 1995年第11期6卷 931-934页

作者： Xiao Pei GUAN Jian Guang SUN Yong Zhong YU(College of chemical Engineering and Materials Science, Beijing institute of Technology, 100081 Beijing) Beijing inst Technol Coll Chem Engn & Mat Sci Beijing 100081 Peoples R China

Selective epoxidation of 11-ene double bond in 11-isopropylidene-endo-tricyclo [6. 2. 1.02.7]undeca-4. 9-diene-3. 6-dione (1)by mCPBA afforded exclusively syn-epoxide 3 3 is much more stable than *** of 3 resulted the corresponding trishomocubane 4. Single crystal X-ray analysis of 4 was carried out to establish the stereo chemistry of the epoxide moiety.

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MICROPOROUS PVDF-HFP-BASED POLYMER MEMBRANES FORMED FROM SUPERCRITICAL CO_2 INDUCED PHASE SEPARATION

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Chinese Journal of Polymer Science 2008年第1期26卷 13-21页

作者： Cao, Jian-hua Zhu, Bao-ku Zuo, Dan-ying Xu, You-yi Li, Ji-ding Zhejiang Univ Inst Polymer Sci Hangzhou 310027 Yuquan Peoples R China Tsinghua Univ Dept Chem Engn Membrane Technol & Engn Res Ctr Beijing 100084 Peoples R China

Microporous poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)membranes following supercritical CO_2 induced phase separation process were prepared using four *** solid electrolytes of PVDF-HFP were formed by microporous PVDF-HFP membranes filled and swollen by a liquid *** effect of the solvents on the morphology and structure,electrolyte absorptions and lithium ionic conductivity of the activated membranes were *** was approved that all the membrane had the similar...

关键词： Poly(vinylidene fluoride-co-hexafluoropropylene) Microporous membrane Conductivity Supercritical CO_2

Study on anti-fungal activity of nitrogen-doped TiO_2 nanophotocatalyst under visible light irradiation

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Chinese chemical Letters 2010年第1期21卷 117-121页

作者： Li, Min Huang, Qun Zeng Qiu, Dong Fang Jiao, Zhu Jin Meng, Zhao Hui Shi, Heng Zhen Nanyang Normal Univ Coll Chem & Pharm Engn Nanyang 473061 Peoples R China Henan inst Educ Dept Chem Zhengzhou 450046 Peoples R China

Nitrogen-doped TiO_2 nanophotocatalysts were prepared,and characterized by XRD patterns and UV-vis *** results indicated that nitrogen was doped effectively and the shift of the absorption edge to a lower energy and a stronger absorption in the visible light region were *** calcinations temperature is a key factor to narrow the band gap of titania,and consequently affects the response to visible light of nitrogen-doped TiO_2 *** photocatalyst can effectively inhibit the g...

关键词： Nitrogen-doped TiO_2 Inhibit H.maydis

A Novel Sieving Medium for Separation of DNA Fragments-Poly(acrylamide-dimethylacrylamide)

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Chinese chemical Letters 2000年第11期11卷 1015-1018页

作者： Ren, JC Fang, ZF Hunan Normal Univ Coll Chem & Chem Engn Dept Chem Changsha 410081 Peoples R China

A short chain poly (acrylamide-dimethylacrylamide) was synthesized in water phase using isopropanol as a chain transfer agent. This copolymer can form a stable dynamic coating on the inner surface of the capillary, thereby suppressing the electroosmotic flow and DNA-capillary wall interaction. The high efficient separation of DNA fragments and SSCP analysis were obtained in bare capillaries using this copolymer as a sieving medium.

关键词： poly (acrylamide-dimethylacrylamide) DNA capillary electrophoresis

Preparation of open-tubular columns in electrochromatography with sol-gel technology

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Chinese Science Bulletin 1998年第9期43卷 790-791页

作者： Li, F Zhang, HB Gao, D Lu, GJ Gu, JL Fu, RN Beijing inst Technol Dept Chem Engn Beijing 100081 Peoples R China

Oscillation Conditions for An Electrode-separated Piezoelectric Sensor in Electrolyte Solution

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chemical Research in Chinese Universities 1996年第1期12卷 22-31页

作者： SHEN Da-zhong(chemistry College, Shandong University, Jinan, 250100)KANG Qi(chemical Engineering Department, Jinan Branch of Shandong institute of Mining and Technology, Jinan, 250031 )YAO Shou-zhuo(New Material institute, Hunan University, Changsha, 4100 SHANDONG UNIV COLL CHEMJINAN 250100PEOPLES R CHINA inst MIN & TECHNOL DEPT CHEM ENGNJINAN 250031PEOPLES R CHINA HUNAN UNIV NEW MAT INSTCHANGSHA 410082PEOPLES R CHINA

Based on the needs of the oscillation equation and frequency stability, three oscillation conditions are proposed and have been experimentally verified for an electrode-separated piezoelectric sensor (ESPS ) in electrolyte solutions. The present paper covers the dependence of the minimum cell constant needed for the ESPS on solution conductivity. The oscillation conditions of the classical liquid piezoelectric sensor are discussed. The 'cease-to-oscillate' frequencies of the ESPS were measured.

关键词： Piezoelectric sensor Quartz crystal Cell constant Conductivity

Water-Soluble Metalloporphyrins as Mimics of Heme-containing Enzymes

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Chinese chemical Letters 2001年第11期12卷 979-982页

作者： Li, XF Liu, JY Guo, ZX Li, YZ Huang, AJ Chang, WB Peking Univ Coll Chem & Mol Engn Key Lab Bioorgan Chem & Mol Engn Beijing 100871 Peoples R China

This letter compared catalase-, peroxidase- and cytochrome P450-like catalytic activities of 15 water-soluble metalloporphyrins produced from Fe, Mn and Co ions and 5 porphyrins. The metalloporphyrins with Fe and Mn as central ions show relatively high catalytic activities of catalase and peroxidase at pH 11.0. Only Mn-meso-tetrakis (4-N-methylpyridinium) porpho-phine of the 15 metalloporphyrins exhibits high cytochrome P450-like activity. Effects of imidazole on the catalytic reactions were also studied.

关键词： metalloporphyrin biomimetic catalysis peroxidase catalase cytochrome P450

Electrochemical Studies on the Deposition of Neodymium in DMSO

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Chinese chemical Letters 1998年第2期9卷 169-171页

作者： Liu, GK Gu, LW Tong, YX Liu, JP Lu, SJ Zhongshan Univ Sch Chem & Chem Engn Guangzhou 510275 Peoples R China

The electrodeposition of neodymium on Pt and Cu electrodes was investigated in DMSO containing NdCl3 and a small mount of water at room temperature. Cyclic voltammetry indicated that the reduction process of Nd(III) on the Pt cathode was complicated. The one-step reduction wave showed two steps by adding 0.3 mol/L ethylenediamine(EN). A delicate yellow, lustrous, strongly adhering film on the Cu electrode was obtained using potentiostatic electrolysis at -1.80 V (vs. aq SCE).

关键词： electrochemical studies deposition neodymium

Real time monitoring of nucleic acids ligation based on molecular beacon

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Chinese Science Bulletin 2003年第12期48卷 1215-1218页

作者： Zhiwen Tang Kemin Wang Weihong Tan Jun Li Lingfeng Liu Qiuping Guo Xiangxian Meng Shasheng Huang Du Li Weifang Luo Hunan Univ Coll Chem & Chem Engn Inst Biol Technol State Key Lab Chemobiosensing & Chemometr Changsha 410082 Peoples R China

A novel method has been developed to monitor the nucleic acids ligation process. Molecular beacon was employed here to convert the ligation information into fluo-rescence signal quickly and quantitatively. This method pro-vides effective and original approach to researching the dy-namic ligation process and the interactions between nucleic acids and ligase. An analytical method for T4 DNA ligase based on this way has been built up with a linear detection range from 2.3×10-4 U/mL to 0.23 U/mL. It is rapid and sensitive to detect 2.8×10-5 U T4 DNA ligase in 10 min.

关键词： nucleic acids ligation T4 DNA ligase real time assay molecular beacon.

Enantioselective Synthesis of Chiral 1-Ferrocenyl Alcohol via CBS-Reduction

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Chinese chemical Letters 2001年第12期12卷 1079-1080页

作者： Chen, WY Lu, J Zhang, YW Shen, ZX Suzhou Univ Dept Chem & Chem Engn Suzhou 215006 Peoples R China

Reduction of prochiral ferrocenyl ketones 2a-e in the presence of 10 mol% of chiral beta -amino alcohols 4a-b provides 1-ferrocenyl alcohols 1a-e in high yields (> 85%) with high optically purity (e.e. up to 96%).

关键词： beta-amino alcohol chiral ferrocene enantioselective synthesis borane