查询词典 chiral

Chlorpheniramine, promethazine. dioxopromethazine and ofloxacin racemates were separated with high performance capillary electrophoresis using β-cyclodextrin or its deriva- tives as chiral selectors.

1引言在1985年首次应用于手性分离'后，高效毛细管电泳就以其高柱效，高分辨和分析时间短等优点而被迅速用于各种手性化合物的拆分。

Total of 11545 chiral crystals were identified by the polarizers.

使用偏光显微镜鉴定了11545颗晶体的手性。

The role of pions in nuclear physics is associated intimately with chiral symmetry, and has evolved far since the initial ideas of Yukawa in which the pion was the intermediate particle of the nuclear forces.

介子在核物理中的作用直接联系着手征对称性，汤川秀树关于π介子的最初概念已经大大发展了。

Generally the catalysts have high activity and good selectivity. At present the coupling reactions of organoborahes with terminal olefins s acid chlorides and aryl halides play an important synthetic approaches in organoborane chemical. The catalysts can be used by many kinds of organometal compounds such as: irons cobalt nickel ruthenium rhodium palladiums titaniums zirconiums tins indium and lithium organic compounds; The achievement has been amazed in preparing of unsaturated or saturated compounds and in synthesizing of natural products bioactive molecules and chiral compounds.

目前，卤代烃与不饱和烃的偶联反应和有机硼试剂与酰卤和卤代烃的偶联反应已成为有机合成的研究热点，此类反应可用铁、钴、镍、钌、铑、钛、锆、锡、铟、锂等多种有机金属化合物来催化，用于形成含饱和或不饱和C-C键的化合物，并已在天然产物、液晶、具有生理活性物质和手性化合物的合成中应用。

Chapter two is concerned with the syntheses and characterization of some chiral ligands and consists of relevant mechanism of reaction( for example, N anion acts as nucleophilic reagent and different nitriles act as reacting substance).

第二章讨论了若干手性配体的合成与结构，并包含了相关反应的机理探讨(例如N~-做为亲核试剂、不同的腈作为反应底物)。

It is found by solving the self-consistency equa tion that, at zero chemical potential and finite temperature the chiral phase transition is of second order, while both at finite temperature and density and at zero temperature finite density this transition is of first order.

通过求解序参量所满足的自洽方程，其结果表明：在零化学势有限温度情况下，有二级手征相变发生；对于有限温度和密度以及零温有限密度两种情况，手征相变为一级，并且其转变温度或密度与费米子所处的初始相有关，即从破缺相到正常相的转变温度或密度不同于从正常相到破缺相的转变温度或密度。

This thesis is concerned with the chiral generation in the process of crystallization for two-component molecular crystals composed of chloronitrobenzoic acids with aniline derivatives.

本文研究了由氯硝基苯甲酸与各类胺的衍生物所形成的双分子晶体在结晶过程中产生手性的原因。

It is concluded that the 3rd nearest neighbors can not be neglected for the band structures of small-diameter and small-chiral-angle SWCNTs.

因此，第三邻近原子在奈米碳管的能带计算中不可忽略，特别是对於小半径、小角度的奈米碳管。

In the Chapter One, we found the reason that led the decomposition of Betti Base 1 in the process of chiral resolution and an efficient resolution procedure was developed using acetone as the solvent.

我们发现了外消旋Betti碱1在拆分中发生分解的原因，并开发出一条以丙酮为拆分溶剂的拆分方法，经过对各种条件的优化，在以50克的拆分规模上，Betti碱1的拆分化学收率达到84％，光学收率达到99％ee。

They have been used as chiral catalysts in the asymmetric addition of diethylzinc to aldehydes.

将1和2作为有机催化剂，用于催化二烷基锌和醛的不对称加成反应。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。