查询词典 nitrating

In some more complex cases, secondary amines can be nitrated directly with nitrating mixtures.

在某些复杂的情况下，仲胺能用混合硝化剂直接硝化。

Aminothiazole and its homologues can be nitrated in the same way, using a double excess of nitrating mixture

用二倍过量的混合硝化剂，能将氨基噻唑及其同系物以同样的方法硝化。

Not suitable for case hardening or nitrating.

不适合的情况硬化或硝化。

More expensive nitrating agents may be used.

还可应用较贵的硝化剂。

With excessive nitric acid of different concentrations as the nitrating agent, regiospecific of meso-tetraphenylporphyrin were investigated in detail.

以不同浓度的硝酸为硝化试剂，详细考察了多种因素对meso-四苯基卟啉苯环上para位硝化反应的影响。

Research in three aspects is studied in this thesis:(1) Through many experiments,the effects of mixed acid nitratiny reagent and its constitute and the proportion of reactant,as well as the reaction temperature and time ,on the nitrating reaction were studied.

本课题主要做了三个方面的研究：(1)硝化工艺采用硫酸硝酸组成的混酸硝化，通过实验来确定适宜的物料配比、混酸的组成、温度和反应时间以及分析这些因素对反应的影响。

Experiments studied the effects of reacting conditions, solvents, catalysts etc on the reaction, and the best nitrating condition was established.

实验分析了反应条件、溶剂及催化剂等因素对反应的影响，找出了最佳硝化条件。

By the use of new nitrating agent, the reaction eliminated the use of concentrated sulfuric acid and was environmental friendly with high atom economy.

该方法通过改变硝化剂，不仅成功地避免了浓硫酸的使用，而且提高了原子经济性，具有良好的环境效益。

Toluene nitration was carried out with supported heteropolyacids as catalysts and N2O5 as nitrating agent.

用负载型杂多酸为催化剂，N2O5为硝化剂的新型硝化体系，对甲苯的硝化反应进行研究。

In this paper, the latest progress of the nitration of deactivated aromatic compounds is reviewed in the point of view of nitrating agents, including nitrate-sulfuric acid, nitrate ester, nitric acid and nitrogen oxides.

本文从硝化试剂角度综述了近年来钝化芳环的硝化反应的进展，包括硝酸盐/硫酸、硝酸酯、硝酸、氮氧化物等硝化方法。

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％。