查询词典 optical activity

Then, it was condensed with-valine methyl ester to form a chiral imine, which was reacted with allyl zinc bromide in the presence of CeCl3·7H2O to afford the corresponding chiral homoallylic amine with high optical activity.

-N-Boc-3-苯基-2-氨基丙醛与-缬氨基酸甲酯缩合生成手性亚胺，在七水合三氯化铈（CeC13·7H2O）催化以及底物的手性诱导作用下，该手性亚胺与烯丙基溴化锌经不对称加成反应合成了高光活性的单烯丙基化手性胺。

Optical activity which is a character of some substances can be applied to many domains, such as the measurement of glucose concentration.

旋光性质是某些介质的一种特性，此特性可应用在许多领域，如葡萄糖溶液浓度的量测。

Discussions about them show that optical activity of solute had no evident effect on extraction distribution coefficients.

所选溶剂的萃取过程有着三个方面的共性；对于不同种类的溶剂，萃取过程还存在其特殊的规律。

Slow crystal formation gives quite pure crystals that probably need not be recrystallized for the optical activity studies.

缓慢的结晶过程会给出十分纯的晶体，在光学活性的研究中，这些晶体很可能不需要进行再结晶了。

This material is accelerating function of reproduction, but it has a repulsive optical activity, when confronted with the light, they will go to the backlight side.

这物质有加速繁殖的功用，但却具有厌旋光性，每遇到光线时，便会跑到背光的一面去。

It was found that the content of Zn bound in polymeric matrix is all-important to the formation and optical activity for supramolecular aggregates.

由Et_2Zn和Et_2Zn／n-BuLi二元体系合成的聚合物在二价铜盐作用下发生独特的超分子聚集现象。

The antibacterial property, the fluorescence and optical activity were tested elementarily.

初步测试了该类新型化合物的抗菌性、荧光性及旋光性。

In addition, no ion beam-induced optiCal activity was experimentally observed in H+-implanted BGO.

此外，实验中也未观察到H9注入BGO晶体中有离子束诱发的光学活性变化。

The effects of electronic and steric effect of substituted groups, the structure of chiral catalysts and chiral reagents and the reaction system on optical activity of products are summarized.

文章概述了芳香酮取代基的电子效应与空间效应、手性催化剂和手性试剂的结构、反应体系等对产物光学活性的影响，以及全细胞酶、分离酶等不同生物催化体系中芳香酮结构对产物光学活性的影响，并展望了不对称还原的研究及应用前景。

Typical a-amino acids have four different groups attached to the a-carbon atom, and so all amino acids except glycine show optical activity .

典型的α-氨基酸有4个不同的基团连结在α-碳原子上，并且除了甘氨酸以外所有的氨基酸都表现出光学活性。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。