异构现象

农药分子中顺反异构现象

Recent Advances in Cis-Trans Isomerism in Pesticides Molecules

异构现象是非常重要的，因为酶的特异性限制生物体都只能使用两种同分异构体中的一种。

Isomerism is very important because enzyme specificity restricts viable organisms to the use of only one of the two forms .

在实际中，特别是在Internet和Intranet上，大部分XML文档缺少结构说明或存在异构现象，这使得NFS查询有着广泛的应用前景。

In practices , especially in Internet / Intranet , most of XML documents are lack of structural information or heterogeneous , so NFS query becomes more and more popular in recent years .

日光照射对荧光增白剂VBL顺-反异构现象影响的研究

A Study on the Effect of Sunlight Radiation on Fluorescent Brightening Agent VBL

本论文研究内容的重点是如何应用中间件技术来开发基于Web的企业信息系统并给出企业信息系统中存在的异构现象、遗留系统等普遍问题的解决方法。

This paper mainly focuses on the application of middleware technique to the web-based enterprise information system development . It has proposed an approach on solving the heterogeneous database interoperability and legacy system data integration that occurred in ubiquitous enterprise information system by using middleware based technology .

发现了在不同pH介质中喹诺酮类药物的荧光波长和荧光强度的变化规律，并对喹诺酮类药物质子化作用及互变异构现象与荧光性质的相关性进行了考察。

Rules of wavelength and intensity of the fluorescence in different pH medium were discovered . The correlation between the protonation , tautomerism and luminescence characteristics of quinolone are studied . It is found that in pH 6-8 or 2-4 there are two luminescence species .

在模型的构建过程中，考虑了二酮酸类化合物的互变异构现象（酮式和烯醇式）、分子场、电荷以及叠合方式等因素对CoMFA模型的影响。

The influence of tautomerism ( enol and keto ) of DKAs , molecular field , charge , alignment rules and other factors on the CoMFA model were considered .

另外，针对各成员馆之间数据库异构现象，文章利用Z39.50协议标准，设计了HTTP/Z39.50网关，用以解决该问题。

Otherwise , in order to solve the problems of heterogeneous systems between libraries , this article designs HTTP / Z39.50 gateway .

贝尔纳与默顿：科学社会学同基异构现象的社会形成

Bernal and Merton : Social Formation of Base Alloisomerism of Sociology of Science

异构现象与最大硬度原理

Isomeric Phenomenon and the Maximum Hardness Principle

观测到了酮-烯醇互变异构现象。

Ketone - enol tautomerism was observed .

体内pBR322DNA的拓扑异构现象

Topological Isomers of pBR322 DNA iu vivo

从数据库异构现象产生的根本原因出发，研究解决这个问题的方式与方法。

Building on the rooted cause of isomer database , the solution to the problem is studied .

由于地域差异，各国兵器铭文异写、异构现象非常严重。

Due to geographical differences , all weapons , written inscription of heterogeneous phenomenon is very serious .

发现在二氢海松酸异海松酸型树脂酸的分子间存在因双键移位而引起的异构现象。

It was found that isomerization existed between dihydropimaricisopimaric-type resin acids due to the shift of double bonds .

论文对影响反应收率的因素进行了探讨，并对反应产物的异构现象进行了讨论。

The influence of the reaction conditions on yield was examined and the isomerism of the products was discussed . 2 .

在当前村庄建设异构现象明显的情况下，实现异构协同难度大。

The Isomerism phenomenon is obvious in the current construction of the village ; realizing " heterogeneous coordination " is difficult .

随着专题军事地理信息数字化及数据库的普遍应用，专题地理数据库间存在异构现象。

With the development of military thematic geographic information digitizing and broad application of databases , heterogeneity phenomenon exists between thematic geographic databases .

这些衍生物活性分子在生物体中存在着互变异构现象，不同的异构体有不同的生物活性，这些异构体的相对稳定性和异构体之间的相互转变对其性质具有重要的影响。

But the tautomerism of these activity thio derivatives molecular can exist in biology systems and the different tautomers have variable activity effects .

由于偶氮染料光致异构现象，这种体系体现出很多独特的性质，且用现有理论无法进行解释。

Because of the photoisomerization of azo dyes , this system shows many unique characteristics , which could not be explained by existing theories .

同分异构现象存在同分异构体的现象多色空间相干光经杨氏三孔干涉后的光谱奇异现象

The phenomenon of the existence of isomers . The Spectral Anomalies in Young 's Three-Pinhole Experiment Formed by a Spatial Fully Coherent Polychromatic Wave

首次发现并证实了在4,4′-二硝基二苯乙烯-2,2′-二磺酸稀溶液中存在顺反异构现象。采用紫外吸收光谱对其稀溶液的光致顺反异构进行了研究。

The photo-induced cis-trans isomerism in dilute DNS solution was discovered and confirmed for the first time , and was studied by UV absorption spectra .

大量的理论和实验研究丰富了关于质子转移在可能的反应机理、引发异构现象以及其它一些性质方面的认识。

Many theoretical and experimental researches have enabled us to understand the role that proton transfer play in the possible reaction mechanisms and in the induced isomerization processes .

β-二酮类化合物存在着互变异构现象，是典型的烯醇-酮互变体系。其溶液体系的互变现象研究得比较透彻，而气相体系由于缺少研究手段，这方面的报道很少。

The tautomerism of β - keto esters is a typical system of enol-keto tautomerism , which has been thoroughly studied in liquid phase , yet less in gas phase , for lacking of effective techniques .

由于数据库产品的丰富化、数据模式的自治性以及数据语义的多样性等原因的存在，使得数据之间的异构现象日益突出。

Because of the richness of database products , the autonomy of data model , the diversity of semantic data and some other reasons , the heterogeneous situation of data is increasingly outstanding and seriously affects the routine work .

随着网络科技资源的数量迅速增长，科技资源的异构现象、不规范问题日益突出，网络科技资源利用、管理效率亟待提高。

With rapid growth of the network technology resources in number , the heterogeneous phenomenon of the science and technology resources , no norms increasingly prominent , the utilization and the efficient management of the network technology resources need to be improved .

成语多数为四字格，语言空间极为有限，出现同形异构的现象在所难免。

Chinese idioms are always formed with four characters , which are limited in space in homonymy .

肽在生物体系中起着十分重要的作用。肽单元的互变异构平衡现象决定着许多生物分子的结构和功能。

The peptide plays a vital role in biological systems , and the tautomerization of the peptide unit is important for the determination of structures and functions of biological molecules .

基于同步上下文无关文法的句法模型只允许处于同层次中的兄弟节点之间进行调序，无法处理语言间的异构对应现象。

The synchronous context-free gram-mar based syntax models only allow the reordering among the sibling nodes . Thus , it is unable to effectively handle the non-isomorphic tree structure corresponding .

从光谱发现它有顺反异构体互变现象与变色效应。

Spectroscopic experiment found the cis-trans-tautomerism and the color change effect of basic blue .