查询词典 additives

We studied effects of additives in the allylic amination reaction. We found that4NF could improve the reactivity and enantioselectivity.

对于烯丙基胺化反应，我们研究了外加添加剂对对映选择性的影响，我们发现四丁基氟化铵的加入可以大大提高反应速度及对映选择性。

Of course, we can experiment with other additives, such as alum.

当然也可以用其他助剂试验，如明矾等。

In this study, the influence of additives on the mechanical properties and porosity of alumina ceramics is investigated.

本研究主要探讨添加剂对氧化铝陶瓷材料的机械性质及孔隙率之影响。

The influence of phosphorous slag on the setting time of Portland cement and improvement by some additives such as sodium sulphate,calcined gypsum and calcined alunite and synthesized additive were studied.

磷渣是电炉制取黄磷工业的一种工业废渣，在用电炉法制取黄磷时，所得到的以硅酸钙为主要成分的熔融物，经淬冷为粒化电炉磷渣，简称磷渣[1，2]。

We had found that heat absorbents can be used as effective flame retarding additives to those explosives whose heat decomposition mechanisms are mainly decided on temperature, such as AMATOL, while char forming promotors to those explosives in which molecules exsist char forming group, such as TNT, RDX, HMX, etc.

文中推导出的点燃公式和实际情况基本相符，本文还用负催化原理，热点燃的稳态理论以及链反应原理解释了出现自熄的原因并导出了出现自熄的判据。

In this paper,the composition technics and technical requirement of cladding additives of ammonium nitrate are studied.

文章主要对包覆硝酸铵所选用材料的复合工艺及技术要求等进行研究。

Additionally the development prospects and trend of amphoteric papermaking additives and t

并对其在早知工业上的应用状况及其发展前景进行了展望。

Additionally,the development prospect and trend of amphoteric papermaking additives and their specific applications in other related indus- tries are briefly presented.

介绍了两性造纸助剂的分类、制备及其在造纸工业上的应用现状，并对其发展前景进行了展望。

Under certain circumstances, antifoam additives can be abnormally depleted.

在某些情况下，抗泡沫添加剂会无缘无故的损失。

Other causes include loss of antifoam additives, suction leaks, poor reservoir design, using the wrong viscosity or using too much antifoam additive.

其他原因包括抗泡沫添加剂丧失，吸入泄露，蹩脚的油箱设计，粘度不对，或防泡沫添加剂使用过量。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。