抄録
Phase diagram has been determined with X-rays for bilayer membranes of mixed lipids of dioleoyl-phosphatidylcholine/dipalmitoyl-phosphatidylcholine in water. Observed liquidus lines were reproduced well by calculation on the assumption of ideal mixing of the two lipids. In the fluid state there seems to be a transition temperature where a small discontinuous structural change takes place.
Obtained X-Ray data suggest that the direction of tilting of the lipid hydrocarbon chains becomes indefinite with regard to the longitudinal angle keeping the latitudinal angle constant in the intermediate phase of the membranes of dipalmitoyl-phosphatidylcholine between 35°C and 42.5°C.
