催化作用

By analyzing the differences between acidic and basic catalytic action in this transesterificatios, it is considered that the main cause of yielding an anisole by-product is due to the basic catalysis, a Lewis acidic catalyst is helpful for the selective DPC formation.

通过分析酸碱催化作用在酯交换反应中的差异，认为碱催化是副产物苯甲醚生成的主要原因，Lewis酸性的催化剂有利于碳酸二苯酯的高选择性。

In the acylation reaction between anisole with acetyl chloride, The catalyst of ZnCl〓/HY-98 prepared by MWI had the best catalytic activity and the selectivity of p-methoxy acetopheone. The catalytic active centers were ZnCl〓 dispersed in zeolite and the Bronsted acid sites in HY-98 zeolite itself.

在苯甲醚与乙酰氯的酰化反应中，微波固相法制备的ZnCl〓／Y催化剂有相对较好的催化活性和选择性，起催化作用的主要是分散在分子筛表面的ZnCl〓和分子筛本身的B酸。

The method is based on the catalytic effect of trace formaldehyde on the reaction between potassium bromate and Azur A .

研究了在H2SO4介质中，微量甲醛对KBrO3氧化天青A 有较强的催化作用，建立了催化光度法测定微量甲醛的新方法。

Based on the catalytic effects of trace formaldehyde on the reaction between potassium bromate and oxidized azur A,a new catalytic spectrophotometric method has been developed in this paper.

基于在一定温度和硫酸介质中，痕量甲醛对溴酸钾氧化天青A 有较强的催化作用，建立了测定痕量甲醛的新的催化光度法。

With regard to potential catalysis mechanism it is of interest to further investigate the structural basis of phosphorylated protein.

由于磷酸化蛋白质在生物体内具有重要的催化作用，因此研究其催化的结构基础非常重要。

The catalysis of FeS〓 to chalcopyrite was remarkable and a theory of "electrochemical catalysis"was proposed.

基于FeS〓对黄铜矿细菌浸出的显著催化效果，提出了FeS〓对黄铜矿细菌浸出具有"电化学催化作用"的见解。

The results of further experiments show that most of the metallic oxides give a catalytic effect on NO/CO reaction, while pre-reduced Ni2O3 sample shows remarkable catalytic activity to the direct decomposition of NO.

大部分金属氧化物以对NO/CO反应的催化作用为主，而Ni2O3的预还原试样对NO的直接分解反应表现了极强的催化活性。

In ChapterⅤ, the asymmetric reduction of prochiral ketones using borane as the reagent catalyzed by chiral dysprosium catalyst were described.

第五章主要研究了手性镝试剂催化下硼烷对潜手性酮的不对称还原反应，结果表明异丙氧基镝对硼烷还原酮有明显的催化作用。

It can be used in wastewater treatment including papermaking, leather making, coking, printing and dyeing, heavy metals, pesticide and oil pollution with principles of absorption, flocculus and photocatalysis.

空心微珠在水处理方面的研究涉及造纸废水、制革废水、焦化废水、印染废水、重金属废水、农药废水、石油污染等，其作用原理包括吸附作用，絮凝作用，光催化作用三大方面。

The results show that there is a synergism for methanol oxidation on the electrode.

研究结果表明，此种电极对甲醇氧化具有很好的电催化活性，并有协同催化作用。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。