查询词典 catalyze

It shown that PDC does not only catalyze the production of acetaldehyde (PDC's main activity), but also catalyzes an aldoltype condensation reaction in which the hydroxyethyl-ThDP intermediate of enzyme is condensed with a second acetaldehyde to form acetoin.

在研究中发现PDC不仅能催化产生乙醛，还具有醛连接酶的活性。即将二个乙醛分子缩合成3-羟基丁酮，尽管这个活性比产生乙醛的活性低得多。

Basing on above researches, we designed a series of ionic liquid supported acetylacetone metal catalysts and non ionic liquid supported acetylacetone metal catalysts. The catalytic abilities of these catalysts were evaluated by using them to catalyze the methane oxidation reaction.

在以上研究的基础上，本论文设计了系列离子液体支载的乙酰丙酮金属催化剂及非离子液体支载的乙酰丙酮金属催化剂，并通过这些催化剂对甲烷氧化反应的催化效果来预测它们的活性。

Microwave; polymerization; Methacrylic acid; 2- ethyl ester; Allylthiourea; Polymer-Metal Complexes; catalyze; adsorption.

微波； 聚合；甲基丙烯酸N； N-二甲胺乙酯；烯丙基硫脲；高分子金属配合物；催化；吸附

Some new results are obtained from the studies: 1 a novel thermokinetic research method, the characteristic reduced parameter method, has been proposed, and the kinetics of oxidation of benzoquinone by hydrogen peroxide has also been investigated with this method; 2 the kinetic mathematical models that the metallomicelles made from the mono-nuclear or dinuclear complexes and surfactants catalyze the phenolic derivant oxidation have been established respectively; 3 the feasibility and mechanism that the metallomicelle, a mimetic model of peroxidase, catalyzes the phenolic derivant oxidation has been discussed.

研究得到如下新的结果：(1)提出了一种新的热动力学研究法——特征对比参量法，用该法研究了过氧化氢氧化苯醌反应动力学；(2)分别建立了由单核和双核金属配合物与表面活性剂形成的金属胶束催化酚类氧化反应的动力学数学模型；(3)探讨了金属胶束模拟过氧化物酶催化酚类氧化反应的可行性及其机理。

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。

In the same time, water-soluble bidental phosphines ligand BISBIS sulfonated 2,2''-bis(diphenylphosphinomethyl-1,1''-biphenyl was synthesized, and water-soluble rhodium complex Cl was synthesized in situ. This complex which was used as catalysts to catalyze the hydrogenation of avermectin was also tested. Although the rhodium complex containing bidentate phosphine BISBIS showed a higher catalytic activity than one containing TPPDS, the selectivity for ivermectin was lower. How to improve the selectivity will be needed to studied in futur.

同时我们用磺化的2，2''-二-- 1，1''--联苯，以及它们的水溶性威尔金森型铑配合物和环辛二烯的阳离子铑配合物，在利用这些配合物作催化剂，考察它们在各种反应条件下对阿维菌素的选择加氢，由于反应条件以及复合催化剂体系的组成还需要进一步优化，虽然双齿膦配合物显示了较高的活性，然而选择性还有待进一步提高。

The first step in the pathway of bilin biosynthesis is the conversion of heme to biliverdin IX by the heme oxygenase encoded by ho1, then PCB:ferredoxin oxidoreductase encoded by pcyA catalyze BVD to 3Z-PCB.

在血红素氧化酶的作用下，血红素Ⅸ被氧化而共轭环断裂形成胆绿素IV，胆绿素IV被藻蓝胆素合成酶还原和异构化形成藻蓝胆素PCB。

A number of these enzymes have been biochemically characterized in detail, because the potential of alkane hydroxylases to catalyze high added-value reactions was widely recognized.

很多这一类的酶生化特性已作了详细的描述，烷烃加氧酶催化高附加值反应的潜力已得到了广泛地认可。

The results show that in the presence of NaHCO3 as base and DMF-H2O (volume ratio 2∶1) as solvent, the complex could catalyze not only iodobenzene but also non-activated bromobenzene quantitatively at 90 ℃ without the inert gas protection, and furthermore the catalyst could be recovered and reused more than eight times.

结果表明，在没有惰性气体保护的情况下，以NaHCO3作碱，以DMF水溶液(体积比为2∶1)作溶剂，在90 ℃时，该配合物不仅对活性较高的碘代苯能够定量地催化，对未活化的溴代苯也能定量地催化，并且催化剂能够回收再利用8次以上。

The results showed that the dewatered ionic liquid could still catalyze the alkylation, and the carbonium mechanism was established through the GC-MS analysis of the reaction liquid product.

结果表明，脱水后的离子液体仍然可以催化烷基化反应，液体产物的GC-MS分析结果支持正碳离子机理。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。