查询词典 salts

An unstable acid known only in solution and as chromate salts.

一种不稳定的酸，已知仅存在于溶液中或作为一种铬酸盐。

The hide is then stabilized by one of several methods using animal oils, alum, chrome salts or vegetable tanning.

然后是一个隐藏的几种方法采用了稳定的动物油脂、明矾、铬盐鞣制或蔬菜。

Hard-to-detect imitation chrysoprase is made by staining agate with chromium salts.

由铬盐染色的玛瑙可生产出难以检测的仿绿玉髓。

A new chiral quaternary ammonium salt 1a was synthesized by the reaction of cinchonine and(2,4,6-)trimethyl benzyl chloride.Etherification between 1a and benzyl bromide,allyl chloride,or methyl give corresponding etherified quaternary ammonium salts 1b,1c,and 1d.

由辛可宁和2，4，6-三甲基苄氯，合成了一种新的手性季铵盐(1a)，并进一步用苄基溴、碘甲烷和烯丙基氯对分子中的羟基进行醚化，得到相转移催化剂1b、1c和1d。

It is demonstrated that the chiral quaternary ammonium salts catalysts exhibit promising catalytic properties for the substrate. Part III: The synthesis and the characterizing of the macroporous aminomethyl resin-supported cinchona alkaloid complexes and the study on its catalytic properties The part consists of two subsections. the macroporous aminomethyl resin -supported cinchona alkaloid complexes were synthesized by the stuff (cinchonine, quinine and macroporous aminomethyl resin). Their structures were characterized by means of elemental analysis, XPS, TG/DTA; the chiral polymer-supported complexes were first used as catalysts for the reduction of ketones. Their catalytic properties for the reduction processes were investigated. The comparison of the products e.e., the conversion of the substrate among different reduction processes was employed with determined by HPLC. The effects of the time, the temperature, the ratio of catalyst to substrate, reaction solvent as well as the recycle times were also discussed.

第三章聚-4-氨甲基苯乙烯负载金鸡纳碱金属络合物的合成与表征及其不对称催化性能研究本章分为两节，以辛可宁和奎宁及聚-4-氨甲基苯乙烯为原料，合成了4种聚-4-氨甲基苯乙烯负载金鸡纳碱络合物催化剂，并对它们的结构用元素分析、X-射线光电子能谱、TG/DTA等几种测试手段进行了表征；首次将所合成的手性高分子负载的金属络合物用于催化芳香酮不对称还原反应，详细研究了所得的手性高分子负载的金属络合物对不同底物的催化性能，用HPLC等分析手段定量检测了还原过程的底物转化率及其产物对映异构体选择性，并考察了反应时间、反应温度、催化剂和底物投料比、反应溶剂和循环次数对催化性能的影响。

It is the Emperor's mix ofjade cinnabar and salts of mercury.

那是玉帝用紫晶珠砂和天仙玉露所制而成

Investigation was made on the use of aluminum salts coagulant in urban water treatment plant and aluminum concentration in drinking water.

问题的提出铝盐是使用最早、最广泛的混凝剂，据报道，在世界范围内铝盐类混凝剂占混凝剂总量的 80 %。

Some, such as cochineal, come from insects and a small number, including iron and copper salts, come from mineral sources.

有一些，如洋红，来自昆虫，还有一小部分，包括铁和铜盐，来自矿产资源。

The differences of electric mechanism, phase behavior and high temperature stability of cyhalothrin drug-loading microemulsion were investigated when the dodecyl benzenesulfonic salts combined with five coherer counter-ions and polyoxyethylene styrenyl ether were mixed at the same molar ratio.

将十二烷基苯磺酸盐和苯乙烯化苯酚聚氧乙烯醚按摩尔比1∶1混合后，结合5种金属反离子配成增溶高效氯氟氰菊酯的载药微乳体系，研究其在导电机理、相行为及热贮稳定性上的差异。

There was money in the till, perhaps, for surely the village apothecary could not have feared that the most daring housebreaker would imperil his liberty in the pursuit of blue pill and colocynth, or salts and senna.

也许在账台抽斗里存放着钱；毫无疑问，这位乡村药剂师不可能担心最大胆的撬门贼会危及他搜求汞丸、药西瓜和旃那时泻盐的自由。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。