异构的

These results show that the dual fluorescence of 4-AHBO (5-AHBO) is produced by its different tautomers, hut not by the same isomer: the long wavelength emission is from the keto tautomer, and the short wavelength band is produced by four kinds of enol isomers.

结果表明，4-AHBO(5-AHBO)的双荧光不是由同一种异构体发射的，而是来源于不同异构体的发射：长波区的荧光由酮式构型发射，短波区的发射则可能由四种醇式异构体共同产生。

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。

Via comprehensive computations, the possibilities of vinylidene and allene intermediates were excluded, and the reaction mechanism was found to contain the following three steps:(1) gold-catalyzed cyclization to give the cyclic intermediate,(2) the cyclic intermediate undergoing a 1,3-H migration to give a more stable intermediate, with the assistance of water-cluster,(3) finially, the 1,2-H or 1,2-silyl migration occuring for generation of the observed product.

通过对各种可能的反应路径的进行计算和比较，排除了亚甲基卡宾和连二烯中间体的可能性，并确定该异构化反应机理包含以下三个步骤：（1）炔丙基吡啶反应在金催化条件下发生分子内的成环得到环状中间体；（2）环状中间体在水分子簇的协助下优先发生1，3-氢迁移反应，异构化得到更为稳定的中间体；（3）最后再进行1，2-氢迁移或是1，2-硅烷基团迁移即得到实验中所观察到的环异构化产物。

It was verified that photoinducedisomerization of isonitrile compound in condensed phase followed a free radical chainmechanism at room temperature.

再者，作者针对一系列脂肪烃基异腈化合物室温下在凝聚相中的光诱导异构化反应机理进行了探讨和论证，通过自旋捕捉ESR实验和GC产物分析证明室温下液相中异腈化合物的可见光诱导异构化反应遵循自由基链反应机制。

In the first part, the prototropic hydroxy-oxo tautomerisms of 2 (1H)- pyridones/2-hydorxypyridines, one of the most important model systems in molecular biology, have been investigated with self-consistent reaction field method based on continuum model. The influence of the nature and position of substituent groups, the existence of intramolecular hydrogen bonding and tautomeric competition between 2-hydroxy and 4-hydroxy on the tautomeric equilibria have also been examined.

第一部分，首先从溶剂敏感的异构化性质入手，用基于连续介质的自洽反应场理论方法对一类重要的生化模型体系—2（1H）-吡啶酮／2-羟基吡啶互变异构体系进行了研究，系统地考察了取代基性质、取代基位置、分子内氢键的形成以及互变异构竞争的存在对异构化平衡的影响。

A major challenge of the heterogeneous wireless networks is how to jointly utilize the resources of different radio access technologies in an efficient manner. Because of the different system capacities of BS/AP and ununiformity of traffic distribution in different cells, quantities of new calls may be blocked in the overloaded cell in some hot spots; whereas its neighboring under-loaded BS/AP have superfluous bandwidth. In order to raise resource utilization of heterogeneous networks, several novel load balancing strategies are proposed, which combine the call admission control and multi-hop routing protocol of ad-hoc network.

异构无线网络的主要挑战是如何高效利用各种接入网的无线资源，针对异构无线网络基站或AP的容量差异及业务分布不均，导致通信热点地区的新呼叫因负载过重大量阻塞，而相邻轻负载小区却有容量盈余的现象，本文提出了几种联合呼叫接纳控制及ad hoc网络多跳路由算法的负载均衡策略，以提高整个异构网络的资源利用率。

The results showed that the β zeolite had better activities of isomerization and aromatization,and the cracking and aromatizing activities increased with the reaction temperature increasing,but the yield of isomerized olefin s decreased.

结果表明，β沸石具有较好的异构化和芳构化能力，并随反应温度的升高，其裂解和芳构化能力逐渐增强，异构烃产率逐渐降低；工业低硅ZSM-5型分子筛的裂化活性较强；催化裂化汽油经改质后其烯烃含量均有所降低，且辛烷值基本不变。

In this paper,two flows of total isomerization process are introduced,and several aspects of this process are discussed including the characters of isomerized oil ,isomerization catalyst and adsorbent,the feed projects of different feedstocks,the operational conditions and so on.

简单介绍了完全异构化工艺的2种流程，并对该工艺的以下几方面进行了分析：异构化油的特点、常用异构化催化剂的特点、常用吸附剂的特点、不同原料的进料方案和工艺操作条件等。

By using lysozyme, RNase A and protein disulfide isomerase as model proteins, we present a hypothesis that protein cross-linking can be accomplished in three concerted steps:(1) a change in protein conformation;(2) formation of interchain disulfide bonds; and (3) formation of interchain isopeptide cross-links.

我们以溶菌酶、核糖核酸酶A和蛋白质二硫键异构酶为模型对异肽键进行了体外详细的研究，提出了解释异肽键形成机理的假说：1蛋白质发生构象变化包括二级结构的改变；2蛋白质形成分子间二硫键：3二硫键的形成帮助蛋白质形成了分子间异肽键。

In this paper,two flows of total isomerization process are introduced,and several aspects of this process are discussed including the characters of isomerized oil,isomerization catalyst and adsorbent,the feed projects of different feed stocks,the operational conditions and so on.

简单介绍了完全异构化工艺的2种流程，并对该工艺的以下几方面进行了分析：异构化油的特点、常用异构化催化剂的特点、常用吸附剂的特点、不同原料的进料方案和工艺操作条件等。

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。