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Studies on the energy transfer system of terbium-norfloxacin chelate and its interaction with serum albumins

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Chinese Journal of chemistry 1997年第2期15卷 138-143页

作者： Xu, Y Shen, HX Huang, HG NANKAI UNIV DEPT CHEMTIANJIN 300071PEOPLES R CHINA hebei inst TECHNOL DEPT CHEM ENGNTANGSHAN 063009HEBEIPEOPLES R CHINA

The energy absorbed by norfloxacin could be transferred to terbium(III) through chelation of norfloxacin with terbium(III), then the characteristic fluorescence emission could be observed. The interaction of serum albumins with norfloxacin have been investigated in this paper. The results showed that HSA could inhibit the energy transfer between norfloxacin and terbium(III). But, BSA could not. It was shown that the binding properties of norfloxacin to HSA and BSA were totally different.

关键词： norfloxacin terbium(III) energy transfer HSA BSA

Synthesis of a new pyridine-containing diamine and related polyimide

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Chinese chemical Letters 2010年第3期21卷 277-278页

作者： Zhao, Jiu Jiang Gong, Chen Liang Zhang, Shu Jiang Shao, Yu Li, Yan Feng Lanzhou Univ Inst Biochem Engn & Environm Technol Coll Chem & Chem Engn State Key Lab Appl Organ Chem Lanzhou 730000 Peoples R China

A new kind of aromatic diamine monomer containing pyridine unit,2,6-bis[4-(4-aminophenoxy)phenoxy]pyridine(BAPP),was synthesized in three steps,using hydroquinone as starting material.A novel pyridine-containing polyimide was prepared from the resulting diamine BAPP with 4,4 -oxydiphthalic anhydride(ODPA) via a conventional two-step thermal imidization *** resulting polyimide exhibits excellent solubility,film-forming capability and high thermal resistance.

关键词： Pyridine Aromatic polyimide Pyridine-containing diamine

A New Method to Investigate the Clustering Phenomena in Supercritical Fluids

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Chinese chemical Letters 1998年第2期9卷 197-201页

作者： Lu, J Huo, Q Han, BX Yan, HK Chinese Acad Sci Inst Chem Beijing 100080 Peoples R China Beijing Union Univ Chem Engn Coll Dept Chem Engn Beijing Peoples R China

The solvatochromic behavior of acetone in supercritical CO? was investigated from 75 bar to 239 bar and at 318.15K. A clustering model is proposed to investigate the formation of solute-solvent and solute-solute clusters, based on the solvatochromic study and some reasonable assumptions. At lower pressures, there were more than one solute molecules in one cluster. At higher pressures, however, each cluster only contained one solute and the clustering of solute-solvent was dominant.

关键词： supercritical CO2 acetone solvatochromic behavior local density enhancement cluster

Surface Modification of Nanometer Silica by N, N'-dicyclohexyl- carbodiimide Mediated Amidation

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Chinese chemical Letters 2001年第10期12卷 933-934页

作者： Guo, ZX Yu, J Yu, J Tsing Hua Univ Dept Chem Engn Inst Polymer Sci & Engn Beijing 100084 Peoples R China

A potentially versatile procedure for surface modification of nanometer silica is illustrated by N, N-dicyclohexylcarbodiimide (DCC) mediated amidation of stearic acid.

关键词： Nanometer silica surface modification DCC acid amidation.

Predictive toxicology of chemicals and database mining

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Chinese Science Bulletin 2000年第12期45卷 1093-1097页

作者： Jiansuo Wang Luhua Lai Youqi Tang Peking Univ Coll Chem & Mol Engn Inst Phys Chem Beijing 100871 Peoples R China

The toxic chemicals from the database Registry of Toxic Effects of chemical Substances (RTECS) were analyzed by structural similarity comparison, which shows that the structure patterns or characteristics of toxic chemicals exist in a sufficiently large database. Then, a two-step strategy was proposed to explore noncongeneric toxic chemicals in the database: the screening of structure patterns by similarity comparison and the derivation of detailed relationship between structure and activity by using comparative molecular field analysis (CoMFA) of Quantitative Structure-Activity Relationship (QSAR) technologies. From the performance of the procedure, such a stepwise scheme is demonstrated to be feasible and effective to mine a database of toxic chemicals. It can be anticipated that database mining of toxic chemicals will be a new area for predictive toxicology of chemicals.

关键词： predictive toxicology database mining similarity analysis structure patterns QSAR.

Synthesis of 2H-3,1-pyrazolo[3,4-e]oxazines via a new conversion of Friedlander reaction

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Chinese chemical Letters 2007年第6期18卷 636-638页

作者： Li, Jia Rong Zhang, Li Jun Chen, Jin Nan Yang, Xi Quan Wang, Li Jun Zhao, Xiao Fan Qiu, Jun Xia Beijing inst Technol Sch Chem Engn & Environm Beijing 100081 Peoples R China

2H-3,l-Pyrazolo[3,4-e]oxazines (5a-c) and tacrine analogies (6a-c) were designed and prepared using 5-amino-4-cyanopyrazole (7) and cycloketones (2a-c) as reactants. The study demonstrated that the new conversion existed in the Friedlander reaction of o-aminocyanopyrazole with cycloketones. (C) 2007 Jia Rong Li. Published by Elsevier B.V. on behalf of Chinese chemical Society. All rights reserved.

关键词： pyrazole oxazines tacrine cyclocondensation synthesis

A new package:MySAS for small angle scattering data analysis

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Nuclear Science and Techniques 2010年第6期21卷 325-329页

作者： Huang Chaoqiang Xia Qingzhong Yan Guanyun Sun Guang'ai Chen Bo China Acad engn Phys Inst Nucl Phys & Chem Mianyang 621900 Peoples R China

In this paper,A MySAS package,which is verified on Windows XP,can easily convert two-dimensional data in small angle neutron and X-ray scattering analysis,operate individually and execute one particular operation as numerical data reduction or analysis,and graphical *** MySAS package can implement the input and output routines via scanning certain properties,thus recalling completely sets of repetition input and selecting the input *** starting from the two-dimensional files,the MySAS package can correct the anisotropic or isotropic data for physical interpretation and select the relevant *** 50 model functions are fitted by the POWELL code using x^2 as the figure of merit function.

关键词：数据分析小角散射 Windows 二维数据重复输入输入文件 X射线散射数据还原

NOVEL OXIDATION OF HEXABENZYLHEXAAZA-ISOWURTZITANE BY Me_2CHNO_2/CuCl/Py/O_2

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Chinese chemical Letters 1996年第6期7卷 511-512页

作者： Guan, XP Yan, H Sun, JG Yu, YZ BEIJING inst TECHNOL SCH CHEM ENGN & MAT SCIBEIJING 100081PEOPLES R CHINA

Treatheent of2.4. 6. 8, 10.12-hexahany1-2.4. 6, 8,10, 12-hexaazateteracyclo [5.***.0.03.9 03.11]dodecane (1) with ***2/CuCl/Py/O2 results in C(1)-C(7) okidative cleavop to give 1,3.4,5,7,8-hexabenzy-2,6-dioxo-cis-cisid... 详细信息

关键词： CuCl Me2CHNO2 ISOWURTZITANE BY NOVEL OF OXIDATION Py

Neutron response functions and detection efficiency of a spherical proton recoil proportional counter

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Nuclear Science and Techniques 2010年第6期21卷 330-333页

作者： Wang Xinhua He Tie Guo Haiping An Li Zhen Pu Mou Yunfeng Yang Jian China Acad engn Phys Inst Nucl Phys & Chem Mianyang 621900 Peoples R China

The neutron response function and detection efficiency of a spherical proton recoil proportional counter (SP) play key roles in precise measurement of neutron spectra of the interior *** this paper,the response functions and detection efficiency of three SPs developed at CAEP are simulated by *** simulated spectra are compared with pulse-height spectra measured at 0.165,0.575,1.4,and 14.1 MeV of incident *** the calculated detector efficiencies agree within 5%with the data obtained by neutron activation.

关键词：正比计数器响应函数探测效率反冲质子中子谱球形 GEANT4 检测效率