对映的

Objective: To develop a method for purity test and enantioseparation of ephedrine levorotatory by capillary electrophoresis.

目的：建立左旋麻黄碱中对映异构体杂质检查的毛细管电泳方法。

Although it occupies no space in the file, it contributes to the segment's memory image.

尽管在文件中不占用空间，它却对段的内存映像有所贡献。

The theory of kinetic method used in the chiral quantification is introduced and the improvement and applications of it are reviewed.

本文对质谱动力学方法用于手性化合物对映体过量值测定的原理、改进方法、应用领域进行了评述。

The two enantiomers rotate polarized light through opposite angles, canceling each other out so that the racemic mixture has no optical activity.

两种对映体使偏振光向相反的角度旋转，彼此抵销，所以外消旋混合物没有光学活性。

The two enantiomers rotate polarize d light through opposite angles, canceling each other out so that the racemic mixture has no optical activity.

两种对映体使偏振光向相反的角度旋转，彼此抵销，所以外消旋混合物没有光学活性。

More than 60%conversion of the racemate with enantiomeric excess of product higher than 96%was obtained.

当转化率超过60％时，产物-萘普生的对映体过量值仍在96％以上。

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。

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。

Besides, vicinal diamines and hydroxyamines were also synthesized in high enantioselectivities, which should be useful in asymmetric synthesis as optically active ligands.

同时，也高对映选择性地合成了一系列不对称反应中有用的手性邻二胺和邻羟胺化合物。

The attempt to hydrogenation of the alkenyl phthalides has been proved promising, and 55% ee value was the best selectivity by far. But the reault was not very repeatable.

对于烯基苯酞的不对称氢化进行了一定尝试，目前对映选择性最高可以获得55%，但是目前结果还不是很稳定。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！