催化的

Through a series of experiments that were carefully designed, the different magnetization time and magnetic field strength made photocatalytic reaction change in varying degrees.

通过合理实验设计，研究了磁化时间、磁场强度对光催化的影响，讨论了磁化对光催化过程的作用机理，提出磁化对光催化存在协同作用。

The results showed that the effect of the electrostatic field is very different from the traditional electrically assisted photocatalysis.

结果表明，静电场对光催化的影响与通常的电助光催化不同，电场强度越高，光催化效率反而降低。

The test results indicate that the zincate catalyst systems can accelerate these reactions high-effectively, so its selectivity is up to 100% and TOF is 5472h -1, and the activity and the selectivity of the catalyst are kept in six times, and the catalyst system can be availab.

研究了离子液体助催化的各种无机盐催化剂体系用于二氧化碳和环氧化合物通过环加成反应制备环状碳酸酯，结果表明锌盐催化剂体系能够非常高效地催化该反应，最高得到了 5 472h- 1的催化转化频率和 10 0 %的选择性，催化剂使用六次以后没有发现催化活性和选择性的下降，并且该催化剂体系能够适用于各种结构的环氧化合物。

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。

In this field, the absorption on solid surface is the indispensable step of heterogonous catalysis, and the most widely applied catalysis is the one of gas on solid.

据统计，世界上85%的化学制品要依靠催化反应制得，而催化与吸附关系密切，其中固体表面的吸附是多相催化的必经步骤，应用的最为广泛的是气固相的催化作用。

The pH stability of enzyme was 8 and the temperature stability of enzyme was 30℃. Bap-degrading enzyme catalyzed the oxidation of veratryl alcohol to veratraldehyde without H2O2 and the oxidation of Mn2+ by H2O2 to Mn3+.

酵素在将veratryl alcohol氧化生成veratraldehyde时是不需要H2O2协助催化，然而在对Mn2+离子氧化生成Mn3+离子时若有H2O2协助催化下可以加快酵素催化的速度。

Base played a crucial role in this reaction: in the Pd2/L1 catalyzed α-arylation of ethyl malonate, K3PO4 is the base of choice; in the α-arylation of ethyl acetoacetate, K2CO3 is the most effective base.

在这类催化反应中，碱的选择具有重要的影响：以K3PO4为碱， Pd2/L1催化体系在丙二酸二乙酯的α-芳基化中，富电子溴代芳烃显示较好的活性； Pd2/L1催化的乙酰乙酸乙酯α-芳基化时，以 K2CO3为碱，催化体系显示较好的活性，这个催化体系可控制反应得到α-芳基乙酰乙酸乙酯，而不是脱乙酰基的产物。

Base played a crucial role in this reaction: in the Pd2/L1 catalyzed α-arylation of ethy malonate, K3PO4 is the base of choice; in the α-arylation of ethyl acetoacetate, K2CO3 is the most effectiv base.

在这类催化反应中，碱的选择具有重要的影响：以K3PO4为碱，Pd2/L1催化体系在丙二酸二乙酯的α-芳基化中，富电子溴代芳烃显示较好的活性；Pd2/L1催化的乙酰乙酸乙酯α-芳基化时，以K2CO3为碱，催化体系显示较好的活性，这个催化体系可控制反应得到α-芳基乙酰乙酸乙酯，而不是脱乙酰基的产物。

On this basis, chosing 15w germicidal lamp with radiation centred at 253. 7nm or 15w blacklight fluorescent lamp with radiation centred at 365nm as the light source respectively, the destruction effects of trace impurities in water by photocatalytic oxidation method using TiO〓 as an immobile phase have been investigated, and the effects are contrasted with photolysis. The investigation is mounted into Phenol aqueous solution, Hydroquinone and Humic Acid aqueous solutions、three representative halohydrocarbons coexisting in main water、the comprehensive index removal of varied trace organic pollutants in main water、the removal of residual chlorine and the disinfecting action, etc..

在此基础上，选择主波长253.7nm的紫外线杀茵灯或主波长365nm的蓝黑管紫外线荧光灯作为光源，研究了TiO〓膜固定相光催化氧化法去除水中微污染物的效果，包括苯酚水溶液、对苯二酚水溶液和腐植酸水溶液的光催化氧化以及自来水中共存的三种典型的氯代烃水溶液三氯甲烷、四氯化碳和四氯乙烯的混合光催化氧化、自来水中有机物总体去除效果以及光催化去除自来水中余氯的作用和光催化的消毒作用等，并进行了光解对比实验。

This thesis is concerned with studies on the ring opening reaction catalyzed by gold catalysis via carbon-carbon bond cleavages.

本文主要研究了金催化碳碳键断裂的开环反应，全文共分为三个部分：第一章：对均相金催化研究进行了总结，综述了均相金催化的研究进展。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐