共轭酸

DEEA、DBEA、DHEA共轭酸的解离常数pKa值的测定

Determination of the ionization constant of conjugate acids for deea , dbea and DHEA

实验结果表明，DMAP结构中只有吡啶环上的氮具有形成共轭酸的能力，因此DMAP不存在二级解离，并测得其一级解离常数pka为9.6（25℃）；

In view of this , the ionization characteristic of DMAP is determined by neutralizing titration . The experiment result shows that only the nitrogen atom on pyridine ring has the ability to form the conjugated acid and the according pka is 9.6 at 25 ? ℃ .

结果：首次测得了人参三醇3,6二琥珀酸钠酸根共轭酸的离解常数，所测得的酒石酸离解常数与文献值一致。

RESULT : The dissociation constant of panaxatriol 3,6 - disuccinic acid were determined for the first time .

对于水难溶游离有机碱的盐酸盐可采用水&乙醇混合溶剂中的线性滴定法，因此，其共轭酸的稳定常数为10~3～10~（10）的大部分盐酸盐均可滴定。

With Stability constants of their conjugate acids ranging from 10 ~ 3 to 10 ~ ( 10 ), most of the hydrochlorides can be titrated .

通过数学处理，求得溴甲基吡啶的一级和二级反应速度常数以及溴甲基吡啶共轭酸的一级反应速度常数。

Through the mathematical treatment , the first-order and the second-order reaction-rate constants for bromomethyl pyridines and the first-order reaction-rate constants of bromomethyl pyridines conjugated acids were obtained .

这一范围的大小（宽窄）受制于碱的强弱、共轭酸阳离子的体积以及共轭酸阳离子是否能增加胶束表面的电荷等几个方面。

The variation of this pH range was dependent on the strength of the base , the volume of the conjugated acid cation , and whether this cation can increase the surface charge of the micelles or not , etc.

共轭亚麻酸（Conjugatedlinolenicacid，CLnA）是十八碳三烯酸的一组位置和几何异构体，具有抑制肿瘤形成、增强机体免疫力和影响脂代谢等功能。

Conjugated linolenic acid ( conjugated linolenic acid , CLnA ) is a group of position and geometric isomers of octadecenoic acids , which inhibit carcinogenesis , enhance immune and alter the lipid metabolism .

近年来的研究发现共轭亚麻酸（CLN）具有多种非常有益的生理功能，已成为化学家、药理学家、营养学家争相研究的热点。

Conjugated linolenic acids ( CLN ) have been reported to have many beneficial biological activities and have become a studied hotspot in chemistry , food and medicine field in recent years .

共轭亚麻酸的制备、表征和生物活性研究进展

Development of Study on Preparation , Characterization and Biological Activity of Conjugated Linolenic Acids