查询词典 quaternary

In this paper, we synthesized two kinds of new carboxylate Gemini surfactants and one of new bis-quaternary ammonium salt.

本论文共合成了两种新型羧酸盐Gemini 表面活性剂和一种新型季铵盐Gemini 表面活性剂。

The Cenozoic Era is composed of Tertiary period followed by Quaternary period.

新生代是由第三纪和第四纪组成的。

My memory is still very vivid how he delivered his presidental address entitled "Quaternary Glaciation at Lushan, Kiangsi Province, and Its Probable Extension in Central and North China" with convincing g...

作为一个科学家，他强调一个地质工作者首先要做好野外工作，一切地质假说和理论必须以事实为依据。作为新中国的第一任地质部部长，他鼓励地质工作者要为祖国的社会主义建设作出贡献。

A new chiral quaternary ammonium sails prepared from cinchonine was designed and synthesized.

本课题设计并合成了一种新的辛可宁型手性季铵盐。

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。

Alkoxyhydroxylpropylchitooligosaccharide and quaternary ammo-nium-hydroxylpropylchitooligosaccharide possess certain emulsifying property, good hygroscopicity and humidity-retaining ability;the former also possesses good compatibleness, the latter also possesses good generating and stabilizing foam ability.

烷氧基羟丙基甲壳低聚糖和季铵基羟丙基甲壳低聚糖具有一定的乳化性能和良好的吸湿保湿性能；而且前者的配伍性能良好，后者表现出优良的泡沫性能。

The phase change layer may be formed of a quaternary compound including an amount of indium ranging from about 15 at.

该相变层由包括铟的数量在大约15at。

The main differences in chemical compounds related to the taste and flavorbetween cultured and wild prawns may be summerized as follows: 1 The content of quaternary bases in the extractives of wild prawn is higher than that of cultured prawn; 2 The content of fatty acids, C18:2ω6 is higher in the cultured prawn; 3 Many thiazole compounds were found in the odor concentrate of cultured prawn, azulene was found in the odor compounds of wild prawn; 4 The textrue of cultrued prawn meat is relatively weak.

综上所述，养殖对虾与天然对虾的尝味比较中主要差别是提取物组分的有机碱；对虾肌肉脂质比较结果是养殖对虾肌肉脂质中C18：2ω6含量特别高；对虾挥发性成分结果是养殖对虾中有大量的噻唑化合物，天然对虾存在薁类化合物；两类对虾质地比较的结果是养殖对虾质地不及天然对虾。

The result indicated that cationic quaternary ammonium salt decolorizer was a kind of effectual decolorizer for leather dye wastewater.

结果表明季胺盐类脱色剂对皮革染料废水具有良好的脱色效果。

Under this tectonic stress, the neotectonic movement of the basin is active. The main manifestations of the neotectonics include the formation of unconformities at the end of the Miocene, the Pliocene and Quaternary within the sequences, the shift of sedimentation centers, the strong fault activities, echelon pattern of diapir structures, mud volcanoes and earthquakes.

受该应力场作用，盆地新构造运动活跃，主要表现包括中新统末、上新统与第四纪之间及层系内部的不整合，盆地的沉降，沉积中心的迁移，断裂活动，底辟带的发育与分布，泥火山和地震等。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。