查询词典 catalyst

The influences of temperature, time, carboxylic acid dosage and catalyst dosage on the yield and optical purity were discussed.

着重研究了反应温度、反应时间、羧酸溶剂用量和催化剂的用量对产物收率和光学纯度的影响，获得了最佳工艺条件。

In this paper, the direct esterification of carboxylic acid and alcohol by using dealuminated USY as catalyst was studied.

研究脱铝USY 催化羧酸与醇的直接酯化反应，考察了催化剂硅铝比对酯化反应的影响及不同类型酸酶酯化的一般规律。

The effect of the Ni_(70)Mn(25)CO_5 catalyst alloy of high tempera-ture carburization on synthetic diamond have been studied.

本文研究了 Ni_(70)Mn_(25)Co_5触媒合金高温渗碳对人工合成金刚石的影响。

It was found that, after 30 min ultrasonic shock, the surface loading cast-off of the catalyst is only 0.3%.

超声振荡测试结果表明所得催化剂具有较好的粘结强度，30min后脱落率仅为0.3%。

The catalyst and technological conditions that suitable for hydrogenation of castor oil are selected by orthogonal experimental design.

通过正交试验筛选出适合蓖麻油加氢的催化剂及相应的工艺条件。

We ask ourselves therefore, what has been the catalyst to bring about such cataclysmic change?

我们自问，是什么促成了这种巨大变化的发生？

A general problem in homogeneous catalysis, however, is separation and recycling of the catalyst.

在环境问题日益严重的今天，催化剂分离、回收和重复利用成为化学研究的热点。

I think I'm the catalyst.

我想我就是催化剂。

It is the catalyst for economic recovery.

这是经济复苏的催化剂。

I think I can stop the catalyst before they put it in me.

我想我能阻止他们给我注射催化剂了。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。