查询词典 aldehyde ammonia

The reaction process in methanol solvent can be deduced from the computational results with CPCM solvent model and the supermolecular handling, namely the reaction involves four steps in the methanol solvent. The nucleophilic addition of trimethylamine to acraldehyde generates an enolate. Nucleophilic attack of the enolate on the aldehyde forms the carbon-carbon bond, followed by the proton-transfer process and the further elimination generating the product and liberating the trimethylamine catalyst.

对于CH3OH对反应体系的影响，可以综合考虑CPCM溶剂模型及超分子模型下的研究结果，即CH3OH溶剂中反应按四步进行，催化剂三甲胺首先与丙烯醛发生亲核加成，生成的两性离子中间体与甲醛发生类似于Aldol的醛醇缩合，形成碳-碳键，之后发生分子内质子转移，最后经E1cb消除得到产物，并释放催化剂三甲胺。

This method handy, fast, accurate, reappearance is good, the aldehyde in suiting all sorts of water and acrolein while determine

该方法简便、快速、准确、重现性好，适合各种水中乙醛和丙烯醛的同时测定

The special interest devoted to acrolein arises from the fact that it is the shortest unsaturated aliphatic aldehyde.

如果氧化镁可表面中心和酸性沸石存在互补作用，这样催化剂的活性就可以得到解释。

China's recent studies have shown that the mutation of aldehyde dehydrogenase with coronary heart disease and diabetes.

中国最近的研究表明，这个突变的乙醛脱氢酶还与冠心病和糖尿病有关。

This is of course hypothetical, but it is aldehyde fixative for fixed tissue principle.

这当然是假设，但这就是醛类固定液用于固定细胞组织的原理。

The company has the most advanced wood-based panel production equipment, quality inspection apparatus and aldehyde production line.

公司拥有国内最先进的人造板生产设备、质量检测仪器和醛胶生产线。

The aromatic aldehyde compounds are a kind of fine chemicals and have the very broad market prospect.

芳香族醛类化合物是非常重要的一类精细化学品，具有很广阔的市场前景。

The application of traditional wet strength agent such as aldehyde is restricted because of its impact on environment.

摘 要：以醛类树脂为代表的传统湿强剂因对环境有不良影响，应用受到限制。

This review mainly summarized the reaction mechanism and the method of methyl oxided into aldehyde group.

这一部分主要对甲基氧化生成醛基的反应机理、方法及化合物的用途进行综述。

But you do not forget that half of the Chinese people with the mutation of aldehyde dehydrogenase.

可您别忘了，中国人一半带有突变的乙醛脱氢酶。

You can buy sweetened beverages, if that suits you.

你若喜欢的话，可以买些含有糖精的混合饮料。

As many of you are probably aware, Nick and Vanessa were recently faced with an embarrasing sex scandal after naked pictures of the two getting jiggy with it in a hot tub surfaced the net.

正如很多你可能知道，尼克和 Vanessa 最近面临一个尴尬的绯闻事件后，赤裸裸的图片两个越来越jiggy与它在浴缸中的一个热点浮现净。