查询词典 catalysis

Propylene epoxidation to propylene epoxide is one of the most important challenges in catalysis because this reaction possesses both industrial significance and academic importance.

中文摘要：丙烯环氧化制环氧丙烷具有重大的工业应用背景和重要的学术意义，开拓该反应的高效催化体系和催化剂是催化领域的最重要的挑战之一。

MnO_x catalytic gauzes are analyzed using BET、SEM and IR before and after treatment. The result shows that the specific surface area, total pore volume and average pore size of MnO_x reduce dramatically, and the infrared absorption band of N-O enhances. The removal mechanism of NO_2 using MnO_x catalyzer is preliminarily believed as absorption-catalysis process.

对使用前后的MnO_x催化网进行线性扫描和红外光谱分析，得到使用后催化剂比表面积、总孔容和总孔面积明显减小，N-O键增多，初步分析认为NO_2被MnO_x催化网去除的机理为先吸附后发生催化反应为酸。

Under the catalysis of ammonia, tetraethoxysilane hydrolysed and polymerized to form the silica nanoparticles.

将环己烷、正己醇和表面活性剂Triton X-100按一定体积比(12.3∶1.04∶1)混合均匀，形成清澈透明的溶液；将适量的四羧基铝酞菁溶解到浓氨水中，加入到上述混合溶液中，形成反向胶束。

The outstanding properties of near-critical water comparing to that of water at ambient temperature and pressure are its high ionization constant and low dielectric constant,so it possesses self-acid/base catalysis function and special solubility of organics and inorganics.

近临界水与常温常压水相比其突出的性能是电离常数大和介电常数小，因而近临界水自身具各酸碱催化功能和能同时溶解有机物和无机物的特性。

So far they have been synthesized with various substituted groups and cavity-size of 4-20 phenol units. Calixarenes have been utilized in fields of complexation, catalysis, extraction, ionophore and so on.

目前已经合成出了4-20个苯酚单元所构成的不同环腔尺寸和具有不同取代基的杯芳烃：它已在配位、催化、萃取、离子载体、分离材料等领域得到了应用，在色谱中的应用也日益受到关注。

In order to study the catalysis of iron oxide nanoparticles on the metallic fuel ,the nanoparticles of α-Fe2O3 were prepared using iron chloride as raw material and special surfactant as dispersant agent by an orthonormal test.

为了研究纳米氧化铁对金属燃料的催化作用，以氯化铁为原料，以特种表面活性剂为分散剂，通过正交试验制备出分散性好、晶粒度为25。

In chapter I, We study that the catalysis of Al~(3+) on the reduction of Cr~(6+) by citrate acid, tartaric acid, oxalate acid, butyric acid, laetrile acid and malic acid at different temperatures and pH.

本论文共分三部分：第一部分：在不同的温度和pH条件下，通过批式试验研究了Al~(3+)对柠檬酸、酒石酸、草酸、正丁酸、苦杏仁酸、苹果酸还原Cr~(6+)的催化作用。

Thermal decomposition, sometimes with catalysis, of a complex substance, especially the breaking of petroleum molecules into shorter molecules to extract low-boiling fractions such as gasoline .

裂化有时通过催化作用对复合物的热分解，尤指把石油分子分解成更小的分子并提取低沸点的分馏部分，如汽油

It has become emergent to exploit new surfactants, which suit for constituting reverse micelles applied to enzymatic catalysis.

开发新型的表面活性剂，以构建适用于酶催化反应的反胶束体系，已经成为一个亟待解决的问题。

WT5BZThe catalysis of lipase in reversed micelles system s was showed in this review.

该综述对逆胶束系统脂肪酶的催化作了较详细的叙述。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。