检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

肉类中己烯雌酚的高速毛细管电泳安培法测定

分析测试学报 2003年第3期22卷 15-18页

作者：杨冰仪莫金垣赖 中山大学化学与化学工程学院

采用高速毛细管电泳安培法对人工合成雌激素———己烯雌酚 (DES)的测定进行了研究 ;通过优化选择检测电位、毛细管内径和长度、分离电压、缓冲溶液等实验参数 ,DES在60s内可以得到较好的分离 ,检出限为1.0×1. -8mol/L ,DEC浓度在1.48... 详细信息

采用高速毛细管电泳安培法对人工合成雌激素———己烯雌酚 (DES)的测定进行了研究 ;通过优化选择检测电位、毛细管内径和长度、分离电压、缓冲溶液等实验参数 ,DES在60s内可以得到较好的分离 ,检出限为1.0×1. -8mol/L ,DEC浓度在1.48×1. -4～3.69×1. -5mol/L ,1.2.×1. -6～1.85×1. -7mol/L与峰面积分段呈良好的线性关系 ;迁移时间和峰面积的相对标准偏差分别为0.65 %、2.2.% ;将该法用于市售肉类中DES的检测。

关键词：高速毛细管电泳安培法测定己烯雌酚肉类饲料添加剂肉制品分析

Force Field Development for Zinc Protein from QM/MM Force Matching:A Short-Long Effective Function Strategy to Model Zinc Interactions in Metalloproteins

在线全文

学校读者我要写书评

暂无评论

Force Field Development for Zinc Protein from QM/MM Force Ma...

中国化学会第2.届学术年会

作者： Ruibo Wu,1.Yingkai Zhang,2.and Zexing Cao3 1.{2. of Pharmaceutical Sciences,Sun Yet-sen {1.,guangzhou,51.006,China 2.6},New York {1.,New York,1.003,United State 3department of chemistry,xiamen university,xiamen,{12.,China

＜正＞Zinc-containing proteins play essential roles in many biological *** are currently over 8000 structure hits for zinc-containing proteins with searching "zinc" in the Protein Data Bank（PDB）,which constitute ～1.% of the total structures in ***,modeling the Zn-Ligand coordination interaction in zinc protein is a well-known challenge due to the inherent flexibility feature of zinc coordination

关键词：

Microphase Separation Behavior on the Surfaces of Poly（dimethylsiloxane）-block-poly（2.2.3,3,4,4,4-heptafl-uorobutyl methacrylate） Diblock Copolymer Coatings

在线全文

cnki会议

学校读者我要写书评

暂无评论

Microphase Separation Behavior on the Surfaces of Poly（dime...

2.1.年全国高分子材料科学与工程研讨会

作者： Zheng-Hong Luo~*,Hai-Jiang Yu,Wei Zhang (department of {1. and Bio{1. engineering,college of chemistry and chemical engineering,xiamen university,xiamen 361.05,P R China

＜正＞Microphase separation behavior on the surfaces of poly（dimethylsiloxane）-block-poly （2.2.3,3,4,4,4-heptafluorobutyl methacrylate）（PDMS-b-PHFBMA） diblock copolymer coatings was *** PDMS-b-PHFBMA diblock copolymers were successfully synthesized via atom transfer radical polymerization（ATRP）.The chemical structure of the copolymers was characterized by nuclear magnetic resonance（NMR） and Fourier transform infrared（FTIR） *** composition was studied by X-ray Photoelectron Spectroscopy（XPS）.Copolymer microstructure was investigated by atomic force microscopy（AFM）.The microstructure observations show that well organized phase-separated surfaces consist of hydrophobic domain from PDMS segments and more hydrophobic domain from PHFBMA segments in the *** increase of the PHFBMA content can strengthen the microphase separation behavior in the PDMS-b-PHFBMA diblock *** the increase of the annealing temperature can also strengthen the microphase separation behavior in the PDMS-b-PHFBMA diblock ***, Flory-Huggins thermodynamic theory was preliminarily used to explain the microphase separation behavior in the PDMS-b-PHFBMA diblock copolymers.

关键词： Microphase separation behavior PDMS-b-PHFBMA Flory-Huggins thermodynamic theory

低碳烷烃选择氧化反应中催化剂动态结构研究进展

在线全文

cnki会议

学校读者我要写书评

暂无评论

天然气化工—C1.学与化工 2002年第6期27卷 38-41页

作者：张昕万惠霖翁维正伊小东清华大学一碳化学与化工国家重点实验室北京100084 厦门大学固体表面物理化学国家重点实验室厦门361005

考察低碳烷烃选择氧化反应中氧化物催化剂的动态结构 ,对于准确揭示反应条件下催化剂的构效关系 ,设计高效催化剂具有重要意义。本文综述了近年来低碳烷烃选择氧化反应中氧化物催化剂动态结构的研究进展。

关键词：低碳烷烃选择氧化反应动态结构氧化物催化剂原位表征

Loss of genetic variation in hatchery produced *** Using AFLP and Aiiozyme Markers

在线全文

学校读者我要写书评

暂无评论

Loss of genetic variation in hatchery produced *** Using AFL...

中国遗传学会七届二次青年研讨会

作者： LI Zhongbao Chen Xiaolan (Rsheries college,Jimei {1.,{2.,Fujian 361.2.1}P. R. China) (department of chemistry,college of chemistry and chemical engineering,xiamen university,{2.,361.05,P. R. China)

The genetic diversity and differentiation between wild and hatchery *** populations were tested by allozyme and AFLP technique. The results from allozyme technique showed that there was a decline in allelic richness, percentage of polymorphic loci (P0.95%) and observed heterozygosity and a change in allele frequency in three loci, SDH-1. AAT-1.and EST-1. Allelic richness, percentage of polymorphic loci and observed heterozygosities ranged from 1.4 (0.2. to 1.2.(0.1., from 30 to 2., from 0.1.0 (0.1.4) to 0.1.0 (0.1.3) within both wild and hatchery *** populations, respectively. Compared to wild population, the hatchery population from AFLP technique also showed that there was a reduction in effective number of alleles, gene diversity, shannon’s information index and percentage of polymorphic loci, they ranged from 1.52.0} to 1.4675, from 0.2.32.to 0.2.09, from 0.42.2.to 0.3778 and from 69.93 to 62.09, respectively. But no significant differentiation was found between wild and hatchery *** populations (allozyme FST = 0.003;AFLP FST = 0.012.. It is inferred that it is small effective population size inbreeding that results in loss of genetic variation in the hatchery *** seed.

关键词：

Effects of Ancillary Ligand on Au-Carbene Bonding and Implications to the Electrophilicity and Chemoselectivity of Gold-Carbene Complexes

在线全文

cnki会议

学校读者我要写书评

暂无评论

Effects of Ancillary Ligand on Au-Carbene Bonding and Implic...

中国化学会第2.届学术年会

作者： Qiao He,Kai Tan,Xin Lu State Key Laboratory of Physical chemistry of Solid Surfaces & Fujian Provincial Key Laboratory of Theoretical and Computational chemistry,{2.,college of chemistry and chemical engineering,xiamen university,xiamen,361.05

＜正＞Gold-carbene complexes have been recognized as key intermediates in a variety of Au（I）-catalyzed organic transformations that involve such carbene precursors as alkynes,α-diazocarbonyl compounds,cyclopropenes and cycloheptatrienes etc.1.ecent experiments revealed that the efficacy and chemoselectivity of such transformations depend strongly on the

关键词：

Modeling and Simulation for the Hydrocracking Reactor

在线全文

cnki会议

学校读者我要写书评

暂无评论

Modeling and Simulation for the Hydrocracking Reactor

第二十七届中国控制会议

作者： Li Qunyong 1.Jiang Qingyin 1.Cao Zhikai 1.Ai Lijiang 2.Zhang Yuqin 2.1.department of {1. and Bio{1. engineering,college of chemistry and chemical engineering,xiamen university,xiamen 361.05,P.R.China 2.PetroChina Kelamayi Petro{1. Company(KPC),Kelamayi Xinjiang 834003,P.R.China

A simplified six-lump-model for one practical residue hydrocracking reactor has been developed according to the characteristics of hydrocracking *** model,including six lumps（crude oil,diesel oil,aviation kerosene,heavy naphtha,light naphtha and gas） ,took both mass balance and kinetics equations into *** fifteen kinetic pa-rameters of the model need to be estimated,which was half less than that of literature [1.,and the parameters were estimated with the measured industrial data shown in literature [1. by Nelder-Mead minimization *** distribution of the hy-drocracking product yields along the reactor position and the reaction time can be predicted by solving this simplified *** calculated result was compared with the measured industrial value and all the relative deviations were within 5%which was close to the literature [1. .

关键词： Hydrocracking Reactor Model Simulation

Viable Eight-coordinate Homoleptic Actinide Carbonyls An（CO）8（An=Th,Pa,U）

在线全文

cnki会议

学校读者我要写书评

暂无评论

Viable Eight-coordinate Homoleptic Actinide Carbonyls An（CO...

中国化学会第2.届学术年会

作者： Rongfu Liu,Kai Tan,Xin Lu State Key Laboratory of Physical chemistry of Solid Surface&Fujian Provincial Key Laboratory of Theoretical and Computational chemistry,{2.,college of chemistry and chemical engineering,xiamen university,xiamen,361.05

＜正＞The actinide chemistry developed rapidly over the past few decades. 1.Yet detailed understanding of the electronic structures and {1. bonding of actinide complexes are challenges to chemists,on account of t...

关键词：

Ruthenium　Coordination　Compounds　with　Polypyridines　Ⅶ．　Non－intercalative　Binding　of　Ru（Ⅱ）　Complexes　with　Calf　Thymus　DNA

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese chemical Letters 1996年第12期7卷 1127-1130页

作者： Guang YANG Jian Zhong WU Lei WANG Tian Xian ZENG Liang Nian JI(department of chemistry, Zhongshan {1., Guanghou. 51.2.5)Xuan TIAN (National Laboratory of Applied of Applied Organic chemistry, Lanzhou {1., Lanzhou,730000) department of chemistry Zhongshan University Guangzhou 510275 Natl. Lab. of Appl. Organ. chemistry Lanzhou University Lanzhou730000

Two new ruthenium polypyridine complexes. L2.uL2. where L=2.2.-bipyridine (bpy) and 2. 9-dimethyl-1. 1.-phenanthroline (dmp); L' is Schiff base prepared from condensation of 4. 5 diazafluoren-9-one (AFO) and aniline. have been prepared and characterized by elemental analyses, electronic absorption, IR spectra. The binding of the complexes to calf thymus DNA has beeninvestics by absorption. emission spectra and circular dichroism spectroscopy. Experimental results show these two complexes bind to DNA by electrostatic mode and non-interactive binding mode.

关键词： Ruthenium Coordination Compounds Polypyridines Calf Binding DNA