查询词典 isomerization

The feedstock was changed from high purity meta- trimethylbenzene to meta- trimethylbenzene blended with 45%-55% mixed trimethylbenzene obtained from the top of the heavy component removal column; the original 3-column separation scheme was replaced by 2 columns; and modified the isomerization reaction system in compatible with the separation system for capacity enlarge.

金陵石化公司炼油厂针对异构化装置生产均三甲苯经济效益不明显的情况，改变了原料路线，在原以高纯度偏三甲苯为原料的基础上掺炼 4 5 %～ 5 5 %的脱重组分塔塔顶混合三甲苯；优化了均三甲苯分离流程，将原来的三塔流程改为两塔流程；进行了异构化反应系统与分离系统相匹配的扩容改造，收到了良好的效果，均三甲苯生产能力由 4 5 0t/a提高到 12 0 0t/a ，收率由 11%提高到 2 2 。0 %～ 2 4 。0 %，纯度由 97.9%提高到 98.9%。

A and B isomers could interconvert each other by an inversion of the imine nitrogen atom. In this work, we investigated the substituent effects and solvent effects. This study used the most popular one of density functional theory method unrestricted hybrid Becke three-parameter Lee-Yang-Parr (B3LYP) with the 6-31+G basis set to compute the reaction and activation energies of B/A thermal isomerization.

腙分子的异构化过程藉由转动亚胺基上的氮原子，使腙分子由A 型结构转变成B 型结构(Scheme1)，本研究运用密度泛函数理论中最常被使用的B3LYP，搭配6-31+G基底函数，计算腙分子异构化过程的活化能以及反应热，并且考虑取代基与溶剂效应对能量所造成的影响。

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。

Fall congeal degrees on mixture of KH150BS bodying oil with different base oil of different nature such as high viscosity index base oil,isomerization unit based oil lost and so on were studied.

进行了KH150BS与高粘度指数基础油、大庆加氢异构化脱蜡油等不同性质基础油调兑后对降凝剂的感受性研究，用倾点测定法考察其降凝效果。

The transition state theory approach to cis-trans isomerization in substituted disilenes is presented.

本文介绍了过渡态理论对双键取代物顺反异构化过程的处理方法。

Reorientation for photo induced cis-trans isomerization and high T_gs of PIs matrix.

因此，它们在信息存储和光开关等方面具有尤为重要的应用价值。

The photoinduced cis-trans isomerization reaction occurs after photo-irradiation of this compound, and the rate of conversion depends strongly on the polarity of solvents used.

八 研究了C5位联有含氮茋的三芳基-2-吡唑啉化合物(TPP15)的光物理行为，发现：该化合物在不同极性溶剂中的荧光量子产率值呈倒钟形状，这与在不同极性溶剂中邻近效应的大小以及吡唑啉环和含氮芪基团间的电子转移的难易程度有关。

Azobenzene functionalized polyelectrolytes and polyamphiphiles are novel functional polymers with many interesting characteristics such as the photo-responsive properties based on the photo-induced cis-trans isomerization, the ability to build up ordered supramolecular structure, and the sensitivity to the environmental stimuli. The aim of this dissertation is to investigate the rules that control the formation of ordered structures from the azo polyelectrolytes and polyamphiphiles based on the supramolecular interaction, to explore the relationships between the material functionality and the supramolecular self-assembled structures at different levels, and to establish the methods for producing novel materials with potential applications in photonic and electronic areas.

中文题名光响应性偶氮聚电解质自组装及超分子结构的研究副题名外文题名 Self-assembly and supramolecular structure of photoresponsive azo polyelectrolytes 论文作者庹新林导师刘德山教授学科专业材料学研究领域\研究方向高分子材料学位级别博士学位授予单位清华大学学位授予日期2002 论文页码总数162页关键词聚电解质超分子结构自组装偶氮聚电解质馆藏号BSLW /2003 /O631 /38 偶氮聚电解质和两亲性偶氮聚合物是一类新颖的功能性聚合物，同时具有偶氮苯基团的光响应性、聚电解质和两亲性聚合物在适当条件下形成各种有序结构及其结构对周围环境具有敏感响应性等特点。

The azo-dyes perform an optically induced cis-trans isomerization.

氮基染料会发生光致羰基配合物异构化。

This study demonstrates optically and spatially band-tunable color cone lasers based on DDCLC cells with a photoisomerizable chiral dopant. The band-tunability is attributable to the recovery of the helix of the CLC resulted from the trans-cis isomerization induced decrease of the helical twisting power of the chiral dopant.The more the chiral cis-isomers are produced, the larger the tuned lasing band is.

本文主要藉由在胆固醇液晶射中加入可光致同素构化亲手性材，使胆固醇液晶所输出的彩色锥角射波段可光调控及空间调控，其射输出波段可调控的机制是由於当同素构化反应产生后，光致同素构化亲手性材的HTP值低并造成胆固醇液晶距改变，藉此间接调控输出的射波长，同素构化的程愈高，胆固醇液晶所输出的彩色锥角射波段可调控范围也愈大。

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。