Interfacial tension of phosphatidylcholine-cholesterol system in monolayers at the air/water interface.
Interfacial tension of an egg lecithin-cholesterol system was measured across the whole concentration range. Surface pressure-area isotherm measurements were carried out in a Langmuir trough at the air/water interface at room temperature (22 degrees C). The interfacial tension of the air/water interface was divided into contributions of components. The interfacial tension of a 1:1 complex between phosphatidylcholine and cholesterol was calculated. Its value equals 18 mN/m. The difference between the stability constant of 1:1 complex in the bilayer and the monolayer at the air/water interface is discussed.
Brzozowska
Izabela
I
Laboratory of Interfacial Electrochemistry, Faculty of Chemistry, University of Warsaw, PL-02-093, Pasteura 1, Warsaw, Poland.
Figaszewski
Zbigniew A
ZA
D000465:Algorithms; D002784:Cholesterol / Q000737:chemistry*; D008567:Membranes, Artificial; D010713:Phosphatidylcholines / Q000737:chemistry*; D013499:Surface Properties; D013500:Surface Tension; D013816:Thermodynamics
D008567:Membranes, Artificial; D010713:Phosphatidylcholines; D002784:Cholesterol