查询词典 catalytic

The investigation of the catalytic activity and stereoselectivity of ligand 10 was also carried out under another standard set of K〓Fe 〓 conditions (〓/ligand/substrate=0.002: 0.01: 1). The AD reaction of seven olefins gave corresponding diols in 72～99% yield (except for ethyl cinnamate, 48%) and 91～99% ees, which was comparable to those obtained from the reactions using the commercial ligand 〓PHAL.

将单季铵盐手性配体10用于AD反应的另一个催化体系〓BuOH-H〓O/K〓Fe〓中考察其催化活性和立体选择性，在七种烯烃的AD反应中，〓、配体与底物的摩尔比为0.002：0.01：1时，化学产率为72～99％（肉桂酸乙酯除外，为48％），ee值为91～99.9％，与商品配体〓PHAL的催化结果相当。

A new catalytic kinetic spectrophotometric method for the determination of trace cobalt was studied.

研究了催化动力学光度法测定痕量钴的方法。

"Cofactor: An atom , organic molecule, or molecular group that is necessary for the catalytic activity of many enzymes."

辅助因子：许多的一种非蛋白质组分。如果将其从全中除去，则蛋白质部分便失去催化活性。

In this paper,methanol synthesis by the catalytic conversion of coke oven gas was technologically and economically assessed.

焦化工业的清洁生产提出了对焦炉气进行有效利用的重要课题。

Increasing the selective reduction ability of NOx under lean burning condition, enhancing the thermal stability and decreasing the light-off temperature of the catalysts are the three key researching hot points in the area. And quality of the honey comb g-Al2O3 coatings, additives and the preparation parameters are the major effectors of the catalytic activation of the catalysts.

目前对单钯三效催化剂的研究的热点和难点在于：1 提高催化剂对氮氧化物的选择还原能力； 2 增强催化剂的高温热稳定性；3 降低催化剂的起燃温度。g-Al2O3 性能质量，助催化剂的选择及用量，涂层及催化剂的制备工艺等对单钯三效催化剂的催化活性起决定性作用。

Increasing the selective reduction ability of NOx under lean burning condition, enhancing the thermal stability and decreasing the light-off temperature of the catalysts are the three keyresearching hot points in the area. And quality of the honey comb g-Al2O3 coatings, additives and the preparation parameters are the major effectors of the catalytic activation of the catalysts.

目前对单钯三效催化剂的研究的热点和难点在于：1 提高催化剂对氮氧化物的选择还原能力； 2 增强催化剂的高温热稳定性；3 降低催化剂的起燃湿度。g-Al2O3 性能质量、助催化剂的选择及用量、涂层及催化剂的制备工艺等对单钯三效催化剂的催化活性起决定性作用。

From the point of view of the need, fulfilling environmental responsibility is an inevitable requirement of the Sustainable Development Concept and the Scientific Development Concept. From the point of view of the possibility, the rise of Communitarianism will play a catalytic role on the implementation of environmental responsibility.

如果从宏观层面进行理论划分的话，环境责任观念是责任伦理的组成部分；从必要性的角度看，履行环境责任是可持续发展观与科学发展观的必然要求；从可能性的角度讲，共同体主义的兴起将对环境责任的落实将起到促进作用。

The author also changes theproportion of Fe~(3+)、Cu~(2+) in total ions to study the complementariness of Fe~(3+)、Cu~(2+) in thesystem and proves that the replacement of the single catalytic ions with the complicatedSystem Fe~(3+)/Cu~(2+)/H_2O_2 has a good ability of the ability of counter assault against thechanges of pH value.

通过改变Fe~(3+)、Cu~(2+)在总离子中的不同比例，研究了Fe~(3+)、Cu~(2+)在体系中的相互补充、相互促进的作用，证明了用Fe~(3+)／Cu~(3+)／H_2O_2复合体系代替单一的催化离子能有效的对pH的变化起到很好的抗冲击的作用。

The invention provides a fuel cell carbon platinum-carried compound catalyst with small amount of platinum and high catalytic activity, and a preparation method thereof.

本发明提供了一种铂用量少且具高催化活性的燃料电池碳载铂复合催化剂及其制备方法。

Honda defied conventional wisdom by announcing that its new Compound Vortex Controlled Combustion engine could exceed the standard without a catalytic converter or unleaded fuel.

本田无视传统智慧宣布，其新的复合涡流控制燃烧引擎可能超过标准没有催化转换器或无铅汽油。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。