黑色脂质膜中的厚度波动。
Thickness fluctuations in black lipid membranes.
作者信息
Hladky S B, Gruen D W
出版信息
Biophys J. 1982 Jun;38(3):251-8. doi: 10.1016/S0006-3495(82)84556-6.
Abstract
Because a black lipid membrane is compressible, there will be spontaneous fluctuations in its thickness. Qualitative arguments are given that the preferred configuration of the membranes is flat and that thickness fluctuations are smaller in amplitude than the differences in mean thickness observed using different hydrocarbon solvents. Fluctuations with short characteristic lengths will not be large as a result of the large amounts of oil-water contact these would entail. Quantitative analysis based on an extension of the treatment for soap films, predicts that the root mean square (rms) amplitude for fluctuations of wavelength longer than approximately 10 nm is negligible for glyceryl monooleate membranes with squalene (less than 3%) but may be approximately 20% with n-decane. rms fluctuations of 20% would lead to a discrepancy between the rms thickness of the core and the mean reciprocal thickness of only 6%.
摘要
由于黑色脂质膜是可压缩的，其厚度会出现自发波动。定性分析表明，膜的优选构型是平坦的，并且厚度波动的幅度小于使用不同烃类溶剂观察到的平均厚度差异。由于短特征长度的波动会导致大量的油水接触，因此其波动不会很大。基于肥皂膜处理方法的扩展进行的定量分析预测，对于含有角鲨烯（小于3%）的甘油单油酸酯膜，波长大于约10 nm的波动的均方根（rms）幅度可忽略不计，但对于正癸烷，该幅度可能约为20%。20%的均方根波动会导致核心的均方根厚度与平均倒数厚度之间的差异仅为6%。
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