查询词典 catalytic

The tetraoxazoline ligands only afforded the-configuration whether monometallic and/or bimetallic palladium complexes were formed upon the complexing process. Using the chelation-induced axially chiral palladium complex as a catalyst, excellent catalytic activities and enantioselectivities in the Wacker- type cyclization of allylphenols with up to 99% ee were gained.

当它与钯离子配位后只得到了轴构型为S的单金属或双金属配合物，并将该配体应用于钯催化的邻烯丙基苯酚的Wacker-type环化反应中，获得了很好催化活性和高达99% ee。

In addition,the one complex containing benzoaza-15-crown-5 pendant has a relatively higher catalytic activity over another one containing morpholine,which may be due to the preponderant effect of hydrophobic environment of the former.

Schiff碱类金属配合物除在氢化反应、环氧化反应、聚合反应、仿生催化氧化等方面得到广泛的应用外[5]，近两年来，我们发现Schiff碱金属配合物也能有效地促进酯的水解或剪切4

By comparison, multivalent transition metal halides have the best catalytic activity to the Mg-based hydrogen storage materials.

比较发现，多价态过渡族金属卤化物对镁基储氢材料具有最好的催化作用。

The impact of catalysts on naphtha catalytic cracking was investigated.

考察了催化剂对石脑油催化裂解的影响。

A catalyst and an improved process for producing olefins by catalytic naphtha cracking are described.

公开了一种由石脑油催化裂化生产烯烃的催化剂和改进的方法。

Catalytic WAO of naphthalene derivatives was then studied and CuO proved to be an excellent catalyst again.

在层状双电层化合物催化剂中，具有变价组份的组成更有利于提高催化剂的催化效率。

It includes the preparation of catalysts, chlorine dioxide catalytic oxidation high concentration organic wastewater containing naphthol green B and eriochrome black T.

本论文主要研究了二氧化氯催化氧化处理高浓度难降解有机废水新技术，包括催化剂的制备、催化氧化处理萘酚绿和铬黑T两种高浓度有机废水。

Bifunctional catalyst using Mg /Al oxide solid solution as carrier impregnated with cobalt phthalocyanine sulfo nates was prepared in the laboratory. The test result showed that the sa id catalyst had good catalytic activity.

在实验室以镁铝氧化物固溶体Mg(AlO固体碱负载磺化酞菁钴制成的双功能催化剂，对硫醇氧化反应具有良好的催化活性。

It is shown that main reason causing browning and senescence of Nelumbo nucifera gaertn in the storage is that catalytic oxidation of polyphenol oxidasein its tissue make phenols into black pigment.

指出莲藕在贮藏过程中发生褐变和衰老的主要原因是组织内部的多酚氧化酶催化氧化酚类物质产生黑色素。

The character of the niobium oxides and their catalytic application were reviewed.

综述了含铌氧化物的特徵及其在不同催化过程中的应用。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。