查询词典 catalysis

The composite catalyst was characterized by IR,XRD,TG-DSC,SEM,and the catalysis capabilities were evaluated by decolour rate of methyl orange under solar ray.

使用IR，TG-DSC，XRD，SEM等手段对样品进行了表征；以甲基橙为目标物，太阳光为光源，用光解率对光催化剂性能进行了评价。

According to the structure and property of feather fibre fabric and the sizing ingredients,choosing the biological catalyst-enzyme which has high catalysis efficiency and undivided reactivity,to desize the feather fibre fabric ,the paste would be removed quickly and efficiently.

在羽毛纤维织物结构性能基础上，结合织物上所含浆料的组成，选择催化效率高、反应专一的生物催化剂酶对羽毛纤维织物进行退浆处理，可以快速、高效退除织物上的浆料，同时酶退浆时反应条件温和，不需要高温、高压、强酸、强碱的作用条件；采用超声波对羽毛纤维织物进行退浆可以缩短处理时间、降低处理温度，减少药剂用量，而处理效果优于常规法退浆。

Reaction of ketones with sodium diselenide and sodium hydrogen selenide under the catalysis of n-BuNH2 gave a moderate yield of diselenides in a "one-pot" fashion.

在正丁胺的催化下，酮与硒氢化钠、二硒化钠乙醇溶液通过&一锅&法反应得到了中等产率的二硒醚。

Keywords: disubstituted phosphinosilane;cross coupling reaction; Pd(0)-catalysis; disubstituted phosphine compounds

中文关键词：二取代膦基硅烷；钯(0)-催化反应；交叉偶联反应；二取代膦基化合物

The electrocatalytic mechanism is discussed, which was due to the adsorption and the catalysis of functional groups at the electrode surface.

讨论了电催化机理，证明电极表面吸附及表面功能团的催化是发生电催化的主要原因。

The catalysis effect of carbide lime , which is a residue in the ethyne production and has a good sulfur-retention property, on pulverized coal combustion has been studied on a thermogravimetric analyzer.

用热重法研究了不同条件下电石渣的催化煤燃烧特性，发现电石渣对晋城煤的着火温度和固定碳燃尽率都具有一定的促进作用，而且随添加量的增加助燃作用增强。

The characters, types, valid parameters, examinable methods and influence factors are summa-rized for π-π interaction. In addition, some introduction is made for evolution of π-π interaction in the field of self-assembly, asymmetric catalysis, organic semiconductor, and so on.

本文对π-π作用的特征、形式、有效参数和表征方法等作了比较全面的综述，同时小结了影响π-π作用的一些重要因素，最后还概述了近年来π-π作用在超分子组装、不对称催化、有机半导体材料等领域的研究进展。

In this work , 1,8-octodiol, the starting material, reacted with 40% hydrobromic acid to produce 8-bromooctan-1-ol, with the catalytic action of PPTs, its hydroxyl group was protected by 2,3-dihydropyran. Then it coupled with 1-heptaalkyne, by means of P-2 nickel as catalyst, stereoselectivity catalysis hydrogenated, with the catalytic action of acid to take off extremital 2, 3-dihydropyran which protected hydroxy group, then used PCC to oxidize alcohol into corresponding aldehyde.

以1，8-辛二醇为原料，与40%氢溴酸进行单溴代反应，得到8-溴-1-辛醇，在对甲苯磺酸吡啶盐的催化下与2，3-二氢吡喃反应，保护分子中的羟基，再与1-庚炔进行偶联，以P-2镍为催化剂立体选择性催化加氢，酸性条件下脱末端的2，3-二氢吡喃对羟基的保护，使用氯铬酸吡啶盐将醇氧化成醛。

"For his discoveries in connection with the biological combustion processes, with special reference to vitamin C and the catalysis of fumaric acid"

1937年圣捷尔吉·奥尔贝特匈牙利&与生物燃烧过程有关的发现，特别是关于维生素C 和延胡索酸的催化作用&

Surface organometallic chemistry ; tetrabutyl tin ; HY molecular sieve ; grafting reaction ; catalysis ; furfural ; furfuryl alcohol

表面金属有机化学；四丁基锡； HY分子筛；接枝；催化；糠醛；糠醇

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷