Liquid-liquid immiscibility in lipid monolayers

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Some binary lipid mixtures form coexisting liquid phases when spread at the air/water interface. This work describes the pressure-composition phase diagrams of binary mixtures of four unsaturated phosphatidylcholines with dihydrocholesteroI. These four binary mixtures have critical compositions of approximately fifty mole percent, and average critical exponents of 0.25 ± 0.07. The data can also be approximated by a regular solution thermodynamic model, yielding parameters for the non-ideality of these mixtures.




Hagen, J. P., & McConnell, H. M. (1997). Liquid-liquid immiscibility in lipid monolayers. Biochimica et Biophysica Acta - Biomembranes, 1329(1), 7–11.

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