查询词典 purity

The obtained sodium cyanate′s purity was analyzed through gravimetric analysis and the characterization was made by X-ray diffraction.

用重量法分析了所得氰酸钠的纯度，并用X射线衍射对其结构进行了表征。

The influence of synthesis parameters on the purity of sodium cyanate was investigated,such as the mole ratio of urea to anhydrous sodium carbonate,reaction time and reaction temperature.

研究了尿素/无水碳酸钠物质的量比、反应时间和反应温度等反应条件对氰酸钠产品纯度的影响。

Article Name The preparation of high purity sodium cyanate by liquid-solid chemical reaction method

所得氰酸钠的XRD衍射图谱与氰酸钠标准图谱完全一致。英文翻译

Two kinds of cyanate ester of novolac are synthesized with self-made phenolic resin varnish and high purity novolac .

分别以酚醛清漆、高纯酚醛为改性基体制备了酚醛三嗪树脂，并运用热失重分析研究了树脂的耐热性及残炭率。

High purity potassium silver cyanide and potassium gold cyanide were prepared using air blasting cyanidation technique for the first time.

提出了以粗金和粗银为原料制备金银的超细或纳米粉末，用鼓氧氰化技术直接制备氰化亚金钾和氰化银钾的的新方法。

Air blasting cyanidation technique was developed to prepare high purity potassium silver cyanide using raw silver or gold as a starting material.

采取金粉或银粉过量投料和控制浓缩水量，可以使反应后废液中的游离氰含量大大降低，有利于环境保护。

This item plans to construct 5 thousand t/y Tert - butylamine production equipment which uses internally developed independently isobutene cyanide process for the production of raw materials for pure isobutylene, purity of 99.5% of the domestic production of tert - butylamine.

拟建设5000吨/年叔丁胺生产装置。该装置采用国内自主开发的异丁烯氰化法生产工艺，以纯异丁烯为原料，生产纯度为99.5％的叔丁胺产品。

Experimental results indicate that the optical purity of the chiral cyanohydrin obtained by enzymatic reaction is quite high, and it is an excellent starting material for the stereoselective synthesis of the chiral amino alcohol compounds.

实验结果表明，醇腈酶催化合成的手性氰醇光学纯度较高，是合成手性氨基醇化合物的优秀原料，并且在随后的化学转化过程中各步反应产物均很好地保留了光学纯度。

The conditions of reaction of cyclization were moderate, the purity and yield of the product was higher.

环合反应的条件缓和，产品收率和纯度高，在四氢咔唑类化合物的化学制备中具有重要参考价值。

A fast method for the preparation of cytochrome C of high purity from pig heart is presented.

提出了一种从猪心中快速制备高纯度细胞色素C的方法。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。