查询词典 chiral

The most interesting thing is that the space group of a non-chiral macrocycle was a chiral symmetry one. With a p-chlorophenyl substituent, the structure of the aromatice macrocyclic oligomer was unsymmetrical.

利用晶体结构参数计算出大环分子环状孔穴的有效直径，为这类刚性环状齐聚物作为一类纳米结构材料的应用作了理论上的准备。

Two carbonyl triruthenium metal clusters were separated with cellulose tris (3, 5-dimethylphenyl-carbamate) as chiral stationary phase. The effects of the optimal conditions were determined according to the effects of the mobile phase composition, the flow rate of the mobile phase and the solvents of the samples etc on the chiral separation of the metal clusters.

应用纤维素三（3， 5-二甲基苯基氨基甲酸酯）手性固定相对2种羰基钌金属簇合物进行了拆分，通过流动相组成、流速和样品溶剂等条件对拆分影响的考察对拆分条件进行了优化。

This thesis is concerned with the synthesis of new chiral sulfinyl NADH models, whose key step is the synthsis of chiral R-3-pyridyl sulfoxides.

本论文的研究工作主要是合成新的手性亚砜类辅酶NADH模型物，工作重点在手性R基-3-吡啶基亚砜的合成上。

The molecular imprinting chiral stationary phases prepared by bulky polymerization must be ground, sieved and sedimented. The resultant chiral stationary phases were irregular particles and showed lower column efficiency.

本体聚合法制备分子烙印手性固定相需粉碎、筛分和沉降的繁琐步骤，制得的固定相呈无定形颗粒，柱效很低。

The hydrogen bonding and π-π interactions between the chiral stationary phase and the polar group of racemates may be responsible for the chiral recognition.

手性固定相与外消旋样品上的极性基团之间的氢键作用和π-π作用可能是进行手性识别的主要原因。

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。

It is reviewed the applications of Betti base and its derivatives as chiral ligands in asymmetric synthesis, chiral auxiliary synthesis and resolution.

本文综述了近年来Betti碱及其衍生物在不对称合成、手性辅助合成以及拆分中的应用，并对未来Betti碱及其衍生物的应用作了展望。

The thesis here described the chiral resolution of Betti Base and the synthesis of their derivatives, as well as their applications as chiral ligands in asymmetric synthesis.

本文选择了Betti碱及其手性衍生物为研究目标，完成了Betti碱的拆分、手性配体结构的合成，以及它们在催化不对称合成中的初步应用。第一章主要解决了Betti碱1的拆分问题。

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。

Furthermore, from the experimental result of the solid chiral medium manufactured by sol-gel method, a chiral sol-gel containing the griseofulvin within the PMMA solution produced by the first manufacture method, the concentration of griseofulvin is from 0 to 0.0665g/ml and the increment is 0.0133g/ml, it shows that a correlation coefficient is 0.99969, the standard deviation of measured rotation angle is 0.0007deg, and the average relative error of the measured rotation angle is 3.42%.

然而利用溶胶-凝胶法制备出旋光凝胶固体中，在制程一中含灰黄霉素PMMA凝胶实验结果显示，灰黄霉素浓度从0-0.0665g/ml而增量为0.0133g/ml，相关系数为0.99969，而标准偏差为0.0007度和测量旋光角平均相对误差为3.42％。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。