Effects of metal cations on the dynamic characteristics of a phospholipid thin film at an air/water interface

被引:4
|
作者
Makino, M
Kamiya, M
Ishii, T
Yoshikawa, K
机构
[1] TSURUMI UNIV, SCH DENT MED, YOKOHAMA, KANAGAWA 230, JAPAN
[2] NAGOYA UNIV, GRAD SCH HUMAN INFORMAT, NAGOYA, AICHI 46401, JAPAN
关键词
D O I
10.1246/bcsj.69.3429
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We measured the time-dependent surface pressure of a dioleoylphosphatidylcholine film at an air/water interface. Our results indicate that: (i) the surface pressure of the thin film traces a closed hysteresis loop accompanied by repetitive cycles of compression and expansion, and (ii) the area of the hysteresis loop markedly increases in the presence of sodium ions. We propose a kinetic model for this phenomenon which includes cooperative aggregation/dissociation at the air/water interface. The experimental findings have been successfully reproduced with the aid of a computer simulation based on this theoretical model.
引用
收藏
页码:3429 / 3434
页数:6
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