查询词典 catalysis

The adsorption of urea nitrogen onto dialdehyde cellulose under catalysis of immobilized urease in gelatin was studied in batch system.

研究了在固定化脲酶催化作用下双醛纤维素对尿素氮的吸附平衡和动力学。

The weight ratio of catalysis system and ammonium lactate being 0.005-5％, and the magnetism solid acid catalyst and tin dichloride being 20∶1-1∶20; c.

催化体系总的加入量为乳酸铵重量的0.005-5％，磁性固体酸催化剂与二氯化锡的重量比为20∶1-1∶20；c。

Some of the complexes withβ-diketone derive ligands, which potential applicated in optical, electricity, magnetism, absorption, catalysis, ion exchange, gas storage and so forth.

此类配体所构筑的各式各样的配合物在光、电、磁、吸附、催化、离子交换、气体储存、分子载体、生物活性、荧光器件材料等方面具有一定的应用价值。

Catalysis of sulfuric acid has been investigated in the preparation of dibromoalkane by epoxy compound and aliphatic diol .

结果表明：浓硫酸的用量对环氧化合物以及脂肪二元醇合成二溴代烷的收率有很大的影响

The transition metal catalysis reduction, hydride reagents reduction, sodium dithionite reduction and bioreduction ware discussed.

综述了近年来α，β-不饱和羰基化合物α，β-碳碳双键和碳氧双键的选择还原研究进展，讨论了过渡金属催化还原、氢化试剂还原、连三亚硫酸钠还原以及生物还原。

In order to obtain high catalysis effect, dolomite with bigger specific surface area should be chosen.

要想得到好的焦油裂解效果，须选择高比表面积的白云石。

In thes subject, I have analyzed the developing conditions of esculen packing inland and overseas, according to ourselves level, adopting cheap bean dregs as material, using biological zymolysis technology, biological protease and lipase as catalyzer and through the catalysis of enzyme tO make soybean fibre of bean dregs and then form new esculent packing.

本课题通过分析国内外可食性包装的发展状况，结合我国的实际情况，采用价格低廉的豆渣为原料，运用生物发酵技术，以生物蛋白酶、脂肪酶为催化剂，经酶的生物催化作用提取豆渣中的膳食纤维，制成新型可食性包装。

After esterification, the ethyl-2-chloro-3-phenylpropionate reacts with diethyl malonate under the catalysis of sodium ethylate, and we obtain the corresponding triethyl ester. The-benzylsuccinic acid is formed by the triethyl ester reacting with concentrate hydrochloric acid and taking place hydrolyzation and decarboxylation reaction at the same time. In order to avoid the formation of cinnamic acid, the sodium ethylate and diethyl malonate must be react sufficiently. The course has simple operation, inexpensive materials and better yield.

具体制备工艺为：首先以L-苯丙氨酸为原料采用重氮化方法得到-2-氯-3-苯基丙酸，再经酯化得到-2-氯-3-苯基丙酸乙酯后在乙醇钠催化作用下和丙二酸二乙酯缩合，发生SN2反应，得到相应的三乙酯，然后经水解和脱羧，得到-苄基丁二酸；在实验中乙醇钠要和丙二酸二乙酯充分反应，避免生成肉桂酸乙酯；该过程操作简单，原料便宜，产率较高，总收率可达到26.8%。

Expectedly, catalysis by a proper microbial consortium at the MFC anode was also critical to this study.

MFC在适合的管径条件下可以高效去除苯酚的同时，能有较高的产电效率；MFC的阳极反应需要微生物的催化。

Nano ferric oxide is a kind of materials of many functions, and have wide applications in such fields as catalysis, magnet, and medicine etc.

纳米氧化铁是一种多功能材料，在催化、磁介质、医药等方面具有广泛的应用。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。