查询词典 catalytic

The character of the niobium oxides and their catalytic application were reviewed.

综述了含铌氧化物的特徵及其在不同催化过程中的应用。

The structures,physicochemical properties and catalytic applications of niobic acid and niobium oxide are reviewed in this paper.

介绍了铌酸-氧化铌的结构、性质及其在多相催化反应中的研究现状及应用前景。

The property and catalytic application of niobium oxide in the multiphase field were briefly introduced.

简要介绍了铌氧化物的性质及其在多相催化领域内的应用。

Property of metal , catalytic application of acidity , influence of disperse configuration , leaching of niobium

在催化过程中所起的作用，并结合铌在不同反应中的具体应用实例进行了分析和验证。

In chapter 4 an abnormal reaction that the nitro group of 1-aryl-2-nitroethenescan be easily replaced by the organic moity of FG-RZnI using Ni〓 and tertiaryamine as catalyst was first given. The experimental results show that in the presenceof catalytic amount of Ni〓 and tertiary amines, the reaction of FG-RZnI andl-aryl-2-nitroethenes give the substitution products l-aryl-l-alkene, instead ofMichael addition products.

通过实验发现，在催化量的Ni〓及叔胺催化下， l-硝基-2-芳基乙烯与烷基碘化锌并不进行Michael加成反应，而是发生1-硝基-2-芳基乙烯中硝基被取代的反应，生成了高产率的1-芳基-l-烯烃，由于此反应的原料易得、反应条件温和、产物的产率高，因而是合成l-芳基-1-烯烃的有效方法。

Effect of background constituents on the catalytic ozonation of nitrobenzene was investigated.

考察了水中本底成分对催化臭氧化分解水中微量硝基苯的影响规律。

In the reaction of NAE18 with nitrogen mustard aryl phosphorochloridate, 4-dimethylaminopyridine played critical catalytic action.

在合成工作中发现：在NAE18与氮芥芳基磷酰氯的反应过程中， 4-二甲氨基吡啶起着关键性的催化作用。

The domination sites and catalytic active sites in PAL protein of Oryza sativa and Zea mays were also found in NoPAL...

NoPAL1编码的蛋白质序列包含与水稻、玉米PAL蛋白质相同的脱氨基位点和催化活性位点。

Selective catalytic reduction which is extensively studied in recent years is an effective method of taking off NOX .

选择性催化还原作为一种有效脱除氮氧化物的方法，在近年来得到了广泛深入的研究。

The as-prepared NPG showed high catalytic activity towards the oxidation of formic acid and formaldehyde.

研究发现NPG对甲酸、甲醛的氧化具有很高的电催化活性。

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％。