催化作用

Catalyzing the oxidation of o aminophenol by hydrogen peroxide in weak acidic medium.

5的弱酸性介质中，利用Al 对Cu 催化H2 O2 氧化邻氨基酚显色的指示反应的活化作用。

Catalyzing the oxidation of o aminophenol by hydrogen peroxide in weak acidic medium.

研究了在pH 5 。5的弱酸性介质中，利用Al 对Cu 催化H2 O2 氧化邻氨基酚显色的指示反应的活化作用。

The effects of catalyst dosage, the amounts of hydrogen peroxide and phase transfer agent, the pH value of the solution, the reuse of catalyst and the reaction temperature on the azelaic acid yield were investigated.

以30%过氧化氢作为氧化剂，在相转移试剂和磷钨酸催化剂作用下催化油酸制备壬二酸，考察了催化剂磷钨酸用量、过氧化氢用量、溶液pH值、相转移试剂用量、反应温度等因素对壬二酸产率的影响。

Benzylidene acetone desorption potential acid sulfate tin plating solution is very close to the ideal desorption potential; Benzylidene acetone, formaldehyde can regulate the desorption potential role and can increase the current density range; Composite additive D can make acid sulfate tin plating solution in the hydrogen produced during the rapid detachment; Ammonium metavanadate can catalyze Sn4+ and restore to Sn2+, and then make solution stability.

苄叉丙酮的脱附电位很接近酸性硫酸盐镀锡溶液的理想脱附电位；甲醛具有调节苄叉丙酮脱附电位的作用，并且能够增大电流密度范围；复合添加剂D能够使酸性硫酸盐镀锡溶液在电镀过程中产生的氢气迅速脱离；偏钒酸铵能够催化Sn4+还原为Sn2+，从而使镀液稳定。

Three kinds of CpTiCl had been synthesized when was catechol , 2, 2′-biphenol , or 2, 2′-binaphthol , respectively. In the case of CpTiCl〓, was 8-hydroxylquinoline , 2-methyl-8-hydroxyl-quinoline , and 8hydroxyl-5-nitro-quinoline , respectively.

研究表明，这三类半茂钛配合物在助催化剂MAO作用下，于30℃、0.1MPa乙烯压力下均可催化乙烯聚合，并显示较高的活性，远高于未引入非茂配体的CpTiCl〓及不含茂环的相应非茂配合物的活性，这说明同时含一个茂配体和一个非茂配体的半茂配合物是烯烃聚合的优良催化剂。

Further aza-Wittig reactions of iminophosphorane 3 with aromatic isocyanates gave the carbodiimide s 4, which were reacted with secondary amines to give 2-dialkylamino-thieno[2,3-d]pyrimidin-4(3H)-ones 6 in the presence of catalytic amounts of EtO-Na+ in 58%～82%.

应用膦亚胺3与芳基异氰酸酯的氮杂Wittig反应，生成的碳二亚胺4，再与仲胺作用得到中间体5，而后在醇钠的催化下关环制得2-二烷氨基噻吩并[2，3-d]嘧啶-4(3H)-酮衍生物6，产率为58%～82

Lipoprotein lipase gene is a multifunctional protein, which catalyses the hydrolysis of the triglycerides component of Chylomicrons and very low density lipoproteins.

脂蛋白脂酶是一种多功能蛋白，其主要作用是催化乳糜微粒和极低密度脂肪酸的甘油三酯水解，是影响脂肪沉积的关键酶之一。

Besides, the preparation of polymeric iron through bio—catalytical oxidation and its flocculating function have been investigated.

此外，本论文还就聚合铁的生物催化氧化制备及其絮凝作用进行一些探讨。

With review of the role of Ti-containing catalysts in the modern catalytical industry and its impetus to the development of modern industry,the paper briefly describes the latest development of Ti- containing catalysts.

在概述含钛催化剂于现代工业催化剂中的地位和对现代化工的发展所起推动作用的基础上，就近年含钛催化剂研究的新进展及我国催化科学工作者所做的相关研究和有关文献作了简要介绍。

Few minutes are enough to chemisorb significant amount of H2O and CO2.It is demonstrated that the CO2 is the main deactivating agent whereas the negative effect water is less important.

化学吸收大量的这表明了CO2对催化活性降解起主要作用，而水的影响相对不太重要。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！