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首页> 外文期刊>Biophysical Chemistry: An International Journal Devoted to the Physical Chemistry of Biological Phenomena >In vivo characterization of the structures of films of a fatty acid and an alcohol adsorbed on the skin surface
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In vivo characterization of the structures of films of a fatty acid and an alcohol adsorbed on the skin surface

机译:体内表征脂肪酸的薄膜和吸附在皮肤表面上的醇的结构

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摘要

An in vivo analysis of stearyl alcohol and stearic acid films on the skin surface using polarized infrared-external reflection spectroscopy revealed that whether the sample molecules adopt an energetically stable conformation and orientation strongly depends on the molecular functionalities and sample preparation conditions. For stearic acid, even the difference in solute concentration between 0.1 and 0.5 wt% results in a different molecular conformation and orientation. This illustrates that the molecular organization of the adsorbate on the skin surface is sensitively determined by the kinetics of the sample film growth, not by the simple thermodynamic equilibrium with the skin temperature.
机译:使用偏振红外外反射光谱对皮肤表面上硬脂醇和硬脂酸薄膜的体内分析显示,样品分子是否采用能量稳定的构象和取向强烈取决于分子功能和样品制备条件。 对于硬脂酸,即使溶质浓度的差异为0.1和0.5wt%也导致不同的分子构象和取向。 这说明通过样品膜生长的动力学敏感地敏感地确定皮肤表面上的分子组织,而不是通过具有皮肤温度的简单热力学平衡的动力学敏感地确定。

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