查询词典 catalysts

The reaction products of ethylene hydroformylation on the three kinds of catalysts were mainly propanal, ethane and propanol.

反应温度、空速、压力及物料配比对乙烯转化率和丙醛选择性均产生一定程度的影响。

Of the various catalysts which spark off Damon's sense of protectiveness over Graham, the girlfriends issue is the most powerful.

在众多激发Damon对Graham保护欲的事件中"女友"是非常重要的一项。

The performance of these catalysts was similar to that in their methoxycarbonylation of pyrrole, suggesting that the catalyst system obeyed the same mechanism in the methoxycarbonylation of heterocyclic compounds.

这些催化剂的性能和反应规律类似于吡咯的甲氧基羰基化反应，意味着在杂环的甲氧基羰基化反应中，催化体系具有相近的反应机理，这有待于进一步的研究。

In recent years, various skeletal derivatives have been synthesized with organic metals as catalysts, and different side-chain derivatives have been obtained with the reaction of pyrrolidine and hydrophobic functional groups.

近年来，采用有机金属催化合成骨架、四氢吡咯烷与疏水基团相连接合成侧链，取得了一定的进展。

In this paper, not only the mechanism of thermal degradation of polylactide is introduced, but also the kinds of metal catalysts, their influence on L-lactide formation and racemization through thermal degradation of PLLA are referred.

本文介绍了聚乳酸热降解的反应机理，详细阐述了添加的金属催化剂的种类，及其催化PLLA热降解生成L-丙交酯及发生消旋化作用的机理。

A key feature of this methodology is the use of metal catalysts for the in situ racemization of enzymatically unreactive enantiomers in the enzymatic resolution of racemic substrates.

酶和金属配合物的结合扩展了这个方法的使用范围，该方法的主要特征是用酶催化拆分和金属催化原位外消旋化未反应的底物，克服了经典动力学拆分最高产率只有50%的缺陷。

The different effect of catalysts reaction temperature,pressure and reactant vatio was studied.

讨论了催化剂寿命及种类、反应温度、压力、反应物比例对反应的影响。

The effects of reaction time, solvent and catalysts were investigated.

考察了时间、溶剂和催化剂对反应的影响。

The influence of the reaction time, the quantities of catalysts on the yield and quality were investigated.

研究了催化剂的用量，水醇比，反应时间对收率和质量的影响。

The differences of these catalysts reactivity were related to their structures and the activity of lattice oxygen.

这一方面是因为氢的引入使表面的氧物种发生了变化，形成了活性更高的氧物种，另一方面是因为氢的引入加速了氧分子向晶格氧转化。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐