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In the first part of this thesis, a formal [4+2] cycloaddition of ketenes with N-benzoyldiazenes catalyzed by chiral NHCs was studied, which gave 1,3,4-oxadiazin-6-ones in very high yields and enantioselectivites.

论文的第一部分内容是在手性氮杂环卡宾的催化下，烯酮与N-苯甲酰偶氮化合物的环加成反应，合成各种手性的噁二嗪酮，它们还可以经过简单的两步一锅法制备手性氨基酯。

The experiment research shows that the Cu2O catalyzed by visible light make the methylene blue and methyl orange to degrade more than 90%, and the Cu2O can be used for several times.

第三、四章中用氧化亚铜进行光催化活性研究，试验表明在可见光照射下，氧化亚铜能使亚甲基蓝和甲基橙溶液经过一段时间降解达到90%以上；并且氧化亚铜能重复使用几次。

Application of reverse micella enzyme system in oil industry;2. Synthesis of ethyl oleate catalyzed by Lipex lipase in AOT/isooctane reverse micella r system was studied.

在二-(2-乙基己基)琥珀酸酯磺酸钠和异辛烷构建的逆胶束体系中，以Lipex脂肪酶为催化剂，合成了油酸乙酯，考察了各影响因素对其产率的影响，并进行了脂肪酶紫外荧光检测和体系粒度分析。

According to the orthogonal experiments, the optimal transesterification conditions for rapeseed oil and methanol catalyzed by sodium methoxide were obtained: molar ratio of methanol to oil 6:1, amount of catalyst CH3ONa 1.2% of the oil weight, molar ratio of the cosolvent isopropylether to oil 1.2:1, reaction temperature 60℃, reaction time 80 min, the low speed of mixing intensity 120 rad/min, The yield of biodiesel was 96.45%.

通过正交试验得出菜籽油与甲醇酯交换反应的最优条件为：醇油比为6：1，甲醇钠催化剂用量为油重的1.2%，共溶剂与油的摩尔比为1.2：1，反应温度60℃，反应时间80min，低速120r/min搅拌强度下，转化率达到96.45%。

Nucleic acids were determined at nanogram levels based on their enhancement effects on the fluorescence reaction system between H 2O 2 and p hydroxyphenylacetic acid catalyzed by Mn [tetrakis(3 N methylpyridiniumy)porphyrin],a mimetic peroxidase.

痕量核酸对meso 四(3 N 甲基吡啶基)卟啉合锰催化H2 O2 氧化对羟基苯乙酸的荧光反应产生增强作用，且增强程度与核酸浓度之间有良好的线性关系，据此建立了测定核酸的高灵敏的荧光分析方法。

In this paper,we have discussied the desulphurization me- chanism of sulphide catalyzed by the PDS in the level of elec- trons,and proposed the model of the two-center mechanism.

本文在电子水平上探讨了双核酞菁钴磺酸盐催化氧化硫化物的反应机理，提出了 PDS 自解氰化物中毒的双核双中心反应机理模型。

Then the selenium-catalyzed oxidative carbonylation of aniline with thiols has been studied.

接着，考察了在催化量硒作用下苯胺和硫醇的氧化羰基化反应。

In order to broaden the types of the reaction, we have also studied and realized the selenium-catalyzed redox carbonylation of nitroarenes with thiols under pressurized carbon monoxide condition systematically.

为了拓宽反应类型，我们又系统地探讨并实现了在一氧化碳加压条件下硒催化芳香硝基化合物和硫醇的氧化还原羰基化反应。

In the process of reaction of the catalyst, the metal contained in it is introduced in a molecular state into the substance catalyzed (nitro-cellulose).

这种新催化剂是将起催化作用的金属以分子状态引进到被催化的物质之中——硝棉铅，它是金属高聚物的一种。

Thus, after a certain amount of commercial refinement, Superglue (or "Alcohol-Catalyzed Cyanoacrylate Adhesive Composition", to give it its full name) was born.

因此，在经过了一定量的商业提炼之后，万能胶(全名为Alcohol-Catalyzed Cyanoacrylate Adhesive Composition)问世了。

Some of them were ligated to the plasmid vector pCR 2.1 andsequenced,respectively.

将所获DNA片段克隆到pCR2.1载体进行测序，并与基因组数据库进行同源性比较。

Thinking since Google owns Blogger, I would be able to escalate this issue to the support team.

自谷歌的思考拥有Blogger的，我将能够缓解这一问题的支持团队。