化学合成

By changing the ratio of ZnO and Ca2 and by different abstersion methods,three kinds of Ca[Zn-3]2·2 H2O powers with diffrent phase purities were prepared with chemo-synthesized method.

采用化学合成的方法，通过调整ZnO和Ca2的配比，以及用或不用KOH溶液洗涤产物，分别制备了相纯度不同的3种Ca[Zn3]2·2H2O粉体。

The "acetal route" starts from 2-chloro-4-cyanopyridine, 8 , and represents an enantioselective and optimized modification of the original racemic discovery chemistry synthesis.

"缩醛三号"从2-氯-4-氰基、八日而且是不对称和优化原始消旋发现化学合成。

Uses 用途 Approximately 80% of the annual acetylene production of the United States is used for chemical syntheses.

美国每年生产的乙炔的大约80%用于化学合成。

In the first part, chemical synthesis, including by acraldehyde, malonic ester, ami no lactone and others were discussed and synthesis by hydantoin was emphasized.

第一部分讨论了DL-蛋氨酸及其衍生物的化学合成，包括丙烯醛法、丙二酸酯法，氨基内酯法等，并着重介绍了海因法。

Insect repellent ; alicyclic compound ; synthesis ; mosquitoe

昆虫驱避剂；脂环化合物；化学合成；蚊虫

According to sanitary law, food additives is the natural or man-made component not only to improve the quality , color , smelling and taste , but also to antisepsis and manufacture.

按《中华人民共和国食品卫生法》的规定，是指为改善食品品质和色、香、味以及防腐和加工工艺的需要，加入食品中的化学合成或天然物质。

So far the biotin is produced by chemical methods mainly.

但到目前为止，生物素的生产主要依赖于化学合成方法。

Indigo carmine is a kind of common dye and mainly synthesized by chemical methods.

靛蓝是最常用的染料之一，目前主要采用化学合成生产。

This suggests that bacterial chemosynthesis is not a sufficient source of nutrition for these creatures.

这意味着细菌化学合成作为一种食物来源对这些生物并不充分。

The chloromethyl benzoate was first introduced as spacerarm between SW and BSA to synthesize SW quaternary ammonium salt compound , after every compounds were identified by poppen analysis, then to get SW-BSA by the methord of EDC.

引入对氯甲基苯甲酸作为SW与BSA之间偶联的间隔臂，通过化学合成的方法，先合成。。。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失