单层
电场
化学
浓度梯度
相(物质)
膜
压力梯度
电场梯度
色谱法
化学物理
分析化学(期刊)
二进制数
电位梯度
领域(数学)
有机化学
机械
生物化学
物理
算术
数学
量子力学
纯数学
作者
Ka Yee C. Lee,Jurgen F. Klingler,Harden M. McConnell
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:1994-02-04
卷期号:263 (5147): 655-658
被引量:77
标识
DOI:10.1126/science.8303272
摘要
Externally applied electric field gradients gave rise to lateral concentration gradients in monolayers of certain binary lipid mixtures. For binary mixtures of dihydrocholesterol and dimyristoylphosphatidylcholine, the application of an electric field gradient at pressures below the critical pressure produced a liquid-liquid phase separation in a monolayer that is otherwise homogenous. At pressures slightly above the critical pressure, a field gradient produced a large concentration gradient without phase separation. The lipid concentration gradients can be described by equilibrium thermodynamic chemical potentials. The observed effects appear to be relevant to the structure and composition of biological membranes.
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