Surface properties of aqueous amino acid solutions - II. Leucine-leucine hydrochloride and leucine-sodium leucinate mixtures

被引：5
|
作者：
Matubayasi, N [1 ]
Matsuyama, S [1 ]
Akizuki, R [1 ]
机构：
[1] Nagasaki Univ, Fac Fisheries, Nagasaki 8528521, Japan
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2005年 / 288卷 / 02期
关键词：
surface tension; adsorbed films; amino acids; leucine;
D O I：
10.1016/j.jcis.2005.03.046
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
To understand the distinction between the effects of zwitterionic. anionic. and cationic l-leucine upon adsorption and lateral interactions at air/water surface. the surface tensions of aqueous solutions of L-leucine-L-deucinehydrochloride and L-leucine-sodium L-leucinate mixtures were measured as a function of concentration and composition at 25 degrees C. The Surface activity decreases in the order L-leucine > L-leucine hydrochloride > sodium L-leucinate. Both L-leucine hydrochloride and sodium L-leucinate form gaseous adsorbed films through the experimentally accessible concentration range, while the adsorbed film of zwitterionic 1,L-leucine shows a transition between gaseous and expanded film. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码：402 / 406
页数：5
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