查询词典 chiral

In this thesis, a totally new type of chiral heteropolyanion, [Sb_5_(10)Mo_5O_(26)]~(7-), has been isolated as racemic compound 1. The racemate was further resolved into enantiomerically pure crystals L-2 and R-2 by addition of organic units.

本文我们得到了一个由新的手性多阴离子[Sb_5_(10)Mo_5O_(26)]~(7-)构筑的外消旋体1，通过向外消旋体1的溶液中加入有机基团，实现了对外消旋体1的拆分得到了纯旋光活性化合物2，即L-2和R-2。

Pharmacological interactions between the enantiomers may happen when a chiral drug w as used as its racemate .

当手性药物以外消旋体供药用时，其对映体间就可能发生药效学和药代动力学的相互作用。

For drug substances with chiral centers or other configurational requirements, the specifications and tests should assure that material (whether a single enantiomer or isomer, a racemate, or a known ratio of isomers) with the requisite properties for therapeutic activity has been produced.

对有手性中心或其它结构要求的原料药，相关的控制参数和检验应该能够保证，所生产出原料药具有治疗活动所需特征。

The effects of racemate initial concentration, volume ratio of surfactant to organic solvent, pH value in internal or external phase, pH gradient from external to internal phase, ligand metallicion and system temperature on the performances of chiral separation were discussed.

摘 要：研究在含有Cu2+和N-n-十二烷基-L-脯氨酸手性配体的乳状液膜体系中手性萃取分离氧氟沙星对映体的效果，以及外消旋体的初始浓度、表面活性剂与有机溶剂的体积配比、内外水相pH值、从外水相到内水相pH值梯度变化以及配位金属离子与体系温度对液膜手性分离性能的影响。

For drug substances with chiral centers or other configurational requirements, the specifications and tests should assure that material (whether a single enantiomer or isomer, a racemate, or a known ratio of isomers) with the requisite properties for therapeutic actiity has been produced.

对有手性中心或其它结构要求的原料药，相关的控制参数和检验应该能够保证，所生产出原料药具有治疗活动所需特征。

The kinetic resolution of raceme is one of the important ways in the synthesis of chiral com-pounds.

外消旋体的动力学拆分反应是制备手性化合物的重要方法之一。

It may be due to the following two reasons: 1 High steric hindrance caused by rigid structure of substituted fluorenone preventsthe approach of the chiral reductor;2 The prochiral center is, moreover, linked to two coplanar aromatic rings, which due to strong conjugation are highly electronically similar and thus it becomes extremely difficult to distinguish between them.

主要是以下两个原因：1取代芴酮的刚性结构产生高的空间位阻，阻止了手性催化剂的接近；2潜手性中心旁的两个芳香环不仅立体构型非常相似，而且高度的电子相似，很难被手性配体识别。

Objective To develop a RP-HPLC method for the enantiomeric separation of indapamide on a new chiral column CHIRALCEL OD-RHcellulose tris(3,5-dimethylphenylcarbamatecoated on a5μm silica-gel substratefor pharmaceutical study of indapamide.Methods To obtain optimistic method for the enantiomeric separation of indapamide,the inferences of the composition of mobile phase,the flow rate and the temperature on the enantiomer retentivity and selectivity were examined and discussed.

目的采 用新型反相手性色谱柱CHIRALCEL OD-RH(纤维素3，5-二甲基苯基氨基甲酸酯涂敷在5μm硅胶上)，建立吲达帕胺对映体的反相高效液相色谱拆分方法，为研究吲达帕胺手性对映体药代动力学提供基础。

The experimental results show that the quenching mechanism of chiral ruthenium complexes to bovine serum albumin was static quenching.

结果表明，钌配合物对牛血清白蛋白的荧光猝灭机制为静态猝灭。

1Among the many kinds of sea animals , only the shell is chiral.

在芸芸众生的海洋生物中，惟有贝类的壳是手性的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。