查询词典 cinchona

Quinine: Alkaloid found in the bark of cinchona trees and shrub s.

奎宁：金鸡纳树皮中的生物碱，主要用于治疗疟疾。

Quinine: Alkaloid found in the bark of cinchona trees and shrubs.

奎宁：金鸡纳树皮中的生物碱，主要用于治疗疟疾。

The first widely known remedy—from the bark of the cinchona tree—was discovered in the region in the early 1600s.

首先广泛知道的治疗药物――从南美洲的金鸡纳树的树皮――最早在1600年发现在南美。

There was two dollars' worth of fluid extract of cinchona and a dime's worth of aniline in that half-gross of bitters.

不，先生。那六打药酒里面有值两块钱的金鸡纳皮浸膏和一毛钱的阿尼林。

For example, under the most favorable reaction conditions, 5 mol % of bifunctional cinchona alkaloid 1 catalyzed the rearrangement of endoperoxide 2 to the corresponding 4-hydroxyenone in 97% yield and 99% ee.

举例来说，最有利的反应条件下，5%摩尔双金鸡生物碱12催化重组内过氧化物相应4-hydroxyenone在97%和99%产量夷。

"Cinchona:any of several trees and shrubs of the genus Cinchona, native chiefly to the andes and cultivated for bark that yields the medicinal alkaloids quinine and quinidine, which are used to treat malaria."

金鸡纳树：一种金鸡纳属的树木和灌木，原产于安第斯山区，其树皮含有治疗疟疾的药用生物碱奎宁和奎尼定，因而被栽植。

This paper is focused on the preparation, characterization of metal clusters and theircatalytic performance in the enantioselective as well as stereoselective hydrogenations. It iscomposed of the five parts as follows: Chapter 1 A review was given on the two most studied enantioselective systems—Ni/TA and Pt/cinchona system, including some recent progress.

本论文研究了铂、铱纳米金属簇在α-酮酯、α-二酮不对称氢化中的催化性能及金属离子在α-二酮立体选择性氢化中的修饰作用，主要分为以下几部分：第一章对多相不对称催化体系一Ni／TA和Pt／cinchona及其一些最新进展作了较系统的评述；同时简要介绍了纳米金属簇的特性及其在催化中的一些应用。

Cinchona, Costa Rica, January 11, 2009--Debris from houses destroyed by a landslide lie scattered a week after a magnitude 6.1 earthquake hit the region.

2009年1月11日，哥斯达黎加，Cinchona ---被山崩摧毁的房屋的碎片散落了一个星期，一场6.1级的地震之前袭击了这一地区。

The proper in-situ polymerization systems of acidic and basic compounds using amino acid derivatives and cinchona alkaloids as template molecules respectively were adopted for preparation of molecularly imprinted monolithic columns by systematically investigating the effect of polymerization conditions on pore structure and selectivity of resulting polymers. The enantiomers of amino acid derivatives and the diastereomers of cinchona alkaloids were successfully resolved on these columns.

本文分别以氨基酸衍生物和辛可纳生物碱为模板分子，系统研究了制备条件对聚合物孔结构和选择性的影响，建立了合适的酸性化合物和碱性化合物的原位印迹体系。

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。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。