title: Phase transitions in 1,2- and 1,3-diacyl-sn-glycero-3-phosphocholine monolayers at the oil/water interface.
abstract: Moving the phosphatidylcholine group from the 3- to the 2-position in monolayers of distearoyl-sn-glycero-3-phosphocholine at the oil/water interface expands the surface pressure-area isotherm and markedly increases the surface pressure at which phase separation occurs with only a slight change in the monolayer surface density at the onset of the transition. This is interpreted in terms of a change in an ordering parameter in the solid-condensed state.
mesh_terms: D001665:Binding Sites; D008567:Membranes, Artificial; D008954:Models, Biological; D010713:Phosphatidylcholines; D011312:Pressure; D013329:Structure-Activity Relationship; D013499:Surface Properties; D013816:Thermodynamics; D014867:Water
chemical_list: D008567:Membranes, Artificial; D010713:Phosphatidylcholines; D014867:Water