异构体

Objective A procedure to analyze enantiomer profiling of methamphetamine was optimized.

目的 建立甲基苯丙胺毒品的刘映异构体分析的优化方法。

The effects of aromatic solvents, catalyst amount used and reaction conditions on the enantiomer excess e.

本文还探讨了手性相转移催化条件下扁桃酸异构体的不对称合成。

This yields values of zero for a racemate and 100 percent for a pure enantiomer.

对于消旋物来说，该值为0，若为纯的光学异构体，则为100%。

The conditions and equipment should be shown to be suitable to confirm the stereochemical identity of a racemate or an enantiomer.

所用仪器和条件都要能适用于消旋物或光学异构体的结构确认。

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。

Its epimer 17beta androstenediol does not.

它的异构体17-β雄甾二烯没有这种作用。

The efficient first asymmetric syntheses of-6β-hydroxy-7αH-eudesm-4-en-3-one, and its C-6 epimer were achieved starting from-dihydrocarvone, whichprovide a novel and efficient synthetic method to 6-oxgenated eudesmanes.

以-二氢香芹酮为原料，经五步反应，首次完成了6β-羟基-4(5)-烯-3-羰基桉烷及其6位差向异构体的立体选择合成，并为C-6位含氧官能团取代桉烷类化合物的合成提供了一种简便有效的方法。

The thermodynamic phase equilibrium model and the phase diagram is the underline for any separation process.

热力学相平衡模型及相图是结晶分离研究的基础，本研究以二甲苯异构体三元系作为研究对象，通过不同的方法建立三元系的固-液相平衡热力学模型及相图。

The contents of eugenol and its isomers were most the pyrolysis.

裂解产物中含量最多的均为丁香酚及其同分异构体。

The results of determination show that all systems of these three groups are simple eutectic systems.

测定结果表明，这几组同分异构体体系均为简单低共熔系统。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐