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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 31, Number 5
JKCSEZ 31(5)
October 20, 1987 

 
Title
The Effects of Substituent, Pressure and Temperature on the Dissociation Constants of Organic Acids. (5) Dissociation Constants of Leucine in Aqueous Solution

유기산의 해리평행에 미치는 치환기효과와 그의 온도 및 압력의 영향. (5) 수용액에서 루신의 해리상수
Author
Jong-Ui Hwang, Wo-Bung Lee, Jeum-Jae Cho

황정의, 이우붕, 조정제
Keywords
Abstract
루신의 해리상수를 전도도법을 이용하여 온도(15 to 40℃)와 압력(1~2,500bar)을 변화시키면서 측정했다. 루신의 두가지 해리상수는 온도가 높아지면 모두 증가하였다. 그러나 압력이 높아지면 첫째 해리상수는 증가하였으나 둘째 해리상수는 낮은 온도에서는 감소하고 높은 온도에서는 증가했다. 이들 해리상수를 이용하여 해리반응의 열역학적 성질들을 계산하고 이들 성질로부터 해리반응의 특성을 알아보았다.

The two dissociation constants of leucine were measured in the temperature range from 15 to 40℃ and pressure up to 2,500 bar by conductometric method. Both constants were increased as the temperature increased but pressure effect was not same as temperature effect. The first constants were increased as pressure increase but the second constants were decreased as pressure increase in the law temperature range but increased in some higher temperature range. These phenomena were discussed from the thermodynamic properties of the dissociation reactions.

Page
395 - 399
Full Text
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