The temperature effects on the membrane potential of bilayers made from synthetic dl-β-γ-di-palmitoyl-α-phosphatidylcholine in NaCl and CaCl₂ solutions are measured and the membrane selectivity variation is discussed. An evaluation of the activation energies of the membrane-potential-determining process is performed and the calculated values are compared with data obtained from surface pressure measurements, at different temperatures, of monolayers of the same phospholipid formed on NaCl and CaCl₂ solutions of variable concentrations (10^-3 -2 M). © 1982.

Export Date: 21 January 2011Source: Scopus