异构体

The keto form having H atom at N(1) and N(9) was always the predominant structure when cisplatin adducts were bound to guanine. However, other forms could coexist in water.

氢原子在N1和N9上的（1，9）形式异构体总是最稳定的构型，但是别的异构体也可能共存于水中。

X+_ Following host injury, the balance between the epimers and isomers is a determining factor in the overall regulation of hematopoiesis, TH/TH(2) balance, and host resistance to infections and tumor growth.

在宿主损伤以后，雄甾烯的异构体和同分异构体之间的平衡是全部生血作用的控制、平衡细胞/体液免疫、宿主抗感染和抗肿瘤增殖的决定因素。8p*f：kz\-JT6Z，l

This paper introduces tests of constituents and isomeric compound contents of PXE、PEPE and M/DBT produced by several chemical plant by way of gas chromatography and gas chromatography-mass spectrograph combination , and also gibes some comments on present status and quality control of the insulation oil.

本文介绍了采用气相色谱分析及气质联用分析方法对各厂家生产的PXE、PEPE、M/DBT的组份及其同分异构体的含量进行测定的情况，对绝缘油品质的现状及质量的控制提出了一些见解。关键词：绝缘油；气相色谱；组分分析；同分异构体

Results indicated that pesticides show different variability in certain extent in relative response between different matrixes. Certain pesticides are matrix-dependent such as chlorothalonil, paraoxon, deltamethrin, methamidophos, acephate etc, among them, chlorothalonil have better relative response in acidic matrixes (as orange, tomato, grape, kiwi fruit) but have serious suppression in scallion, onion, garlic, leek, lotus root etc.

结果表明，各农药相对响应值具有不同程度差异，个别农药显示了较强的基质依赖特点(如百菌清、对氧磷、溴氰菊酯、甲胺磷、乙酰甲胺磷)；其中百菌清在酸性基质橙子、番茄、葡萄、猕猴桃、蘑菇中稳定，其基质对百菌清起到了保护性作用，且能够抑制或减少溴氰异构体2向异构体1的转化；而在大葱、洋葱、蒜、藕、梨等基质中存在显著的降解或抑制作用。

The separation behavior of o hydroxybenzoic acid, m hydroxybenzoic acid and p hydroxybenzoic acid in high performance capillary zone electrophoresis was investigated using cetyltrimethylammonium bromide as reversed reagent for electroosmotic flow The effects of pH of buffer solution and volume fraction of methanol on the separation, peak shape and elution order were studie

采用十六烷基三甲基溴化铵为电渗流改性剂，考察了邻羟基苯甲酸、间羟基苯甲酸和对羟基苯甲酸在高效毛细管区带电泳模式下的分离行为，研究了缓冲液的pH和添加剂甲醇的用量对这 3种同分异构体的分离、峰形和出峰顺序的影响，并据此优化了这 3种异构体的分离条件。

Objective:To establish a method for determination of the concentration of the stereoisomers of soman in mice brain and diaphragm after soman was subcutaneously administrated to mice.

梭曼有一个不对称的碳原子和一个不对称的磷原子，因此有 4个光学异构体，即CP ，CP ，CP ，CP ，这些异构体的毒理学及代谢特性差别很大。

Enantiomer or solid-state form ratios (e.g., for racemates, and for defined admixtures of isomers or enantiomers or solid-state forms); solubility profile (aqueous and nonaqueous as applicable); partition coefficients; solution pH; dissociation constant; melting or boiling point; refractive index; specific gravity.

该要求可以通过提供下述信息来满足：名称（通用名、化学名、编码等）、化学摘要服务编码、性状描述（如：外观、颜色、物理状态）、分子式和分子重量、结构式、立体化学（找出手性中心、顺式反式异性等）、对映结构体比率（如：外消旋物、规定的异构体、对映异构物和固态形式的混合物）、溶解度概况、分配系数、溶液pH值、解离常数、熔点或沸点、折射率、比重。

Enantiomer or solid-state form ratios (e.g., for racemates, and for defined admixtures of isomers or enantiomers or solid-state forms); solubility profile (aqueous and nonaqueous as applicable); partition coefficients; solution pH; dissociation constant; melting or boiling point; refractie index; specific graity.

该要求可以通过提供下述信息来满足：名称（通用名、化学名、编码等）、化学摘要服务编码、性状描述（如：外观、颜色、物理状态）、分子式和分子重量、结构式、立体化学（找出手性中心、顺式反式异性等）、对映结构体比率（如：外消旋物、规定的异构体、对映异构物和固态形式的混合物）、溶解度概况、分配系数、溶液pH值、解离常数、熔点或沸点、折射率、比重。

The electronic spectra of C70H2 have been studied, of which the characteristic absorptions are consistent with the experimental results.

在此基础上预测C70F2和C70Cl2的稳定性和电子光谱，表明C70F2四种异构体的稳定性顺序与C70H2一致，而C70Cl2则以21， 42-异构体最为稳定。

The enantiomeric purity can be expressed as enantiomeric excess e.e.

光学异构体纯度可以用异构体过量来表示，举例如下

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。