异构的

In chatpter three the mechanism of the gold-catalyzed cycloisomerization of propargylic pyridine was reported.

论文第三章将报道金催化的炔丙基吡啶衍生物的环异构化反应的机理研究结果。

Green coffee beans contain up to 10% of chlorogenic acids, i.e.,various isomers of hydroxy-cinnamoyl esters of quinic acid.

咖啡生豆含有最高可达10%的绿原酸，即，奎宁酸的不同种的羟基酯异构体。

Use of stereoselective or stereospecific synthetic methods or separation of racemic mixtures can be used to obtain individual optical isomers.

可以使用立体选择或立体专一的合成方法，或者外消旋混合物的分离，来获得单独的光学异构体。

The difficult problem is how to reformulate a global query into multiple sub-queries over those local data bases.

基于本体的异构信息集成中的关键问题是如何实现全局本体概念实例查询到局域信息数据查询的变换。

Real performance shows that NetMIDS has strengths, such as heterogeneity, distribution, scalability, flexibility, extensibility, robusticity and application-oriented. It can be beneficial to network managers and reduce misoperation and enhance the efficiency of NM.

实践表明，该系统具有异构性、分布性、可移植性、扩展性、灵活性、系统健壮性、面向应用等多种优点，能够大幅度减轻网络管理员的负担和误操作的机率，提高了网络管理的效率。

The current studies on the catalysts for n-heptane isomerization were reviewed systematically. The factors influencing the catalyst properties were discussed. The noble matel catalysts supported on SAPO HZSM-5 and Y .β zeolite were widely studied for n-heptane isomerization.

阐述了当前正庚烷异构化所用的负载型催化剂和过渡金属碳化物和氧化物催化剂的研究进展，对催化剂性能的影响因素及对策进行了分析与讨论。

It obtained the 3D CAD configurations of the grinder parts based on the product modeling, proposed and adopted four modeling methods such as parameterization, skeletonization, scanning and data conversion etc., studied and implemented the automatic transmission of data between isomeric CAD and CAE systems based on specific software platforms.

实现了基于反求工程造型的磨床零件三维CAD造型，提出并应用参数法、骨架法、扫描法和数据转换等四种建模方法，基于具体的软件平台，研究并实现了对异构CAD与CAE系统间数据的自动传递。3。

Facing distributive network share and application service, it divides government affairs information data into the follows: relational data, geographical spatial data, document and media data and so on. By carrying out the reform of multi-source and different-structure information resource, whose main contents are standardization, formulation and spatialization and the complete register of metadata.

面向分布式网络共享与应用服务，将政务信息数据分为关系型数据、地理空间数据、文档和媒体数据等类型，开展以标准化、规范化和空间化为主要改造内容的多源、异构信息源的改造，并进行完整的元数据登记造册。

Results For TCF-4 gene, multiple isoforms are generated by way of alternative splicing, which encode different proteins.

结果 对于TCF-4基因，不同的剪接形式产生不同的异构体，编码不同的蛋白质。

It is found that the stereochemistry of the reactions of telluronium allylide,crotonylide and trimethylsilyallylide with α,β-unsaturated esters and amides can be tuned by thechoice of reaction conditions.

利用反应条件的变化首次实现了烯丙基、巴豆基、含硅烯丙基碲叶立德与α，β-不饱和酯、酰胺进行环丙烷反应的立体化学调控，能高立体选择性地、高效率地合成两种不同几何异构体中的一个。

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。