Interfacial transfer kinetics of ²²Na⁺ across a synthetic phospholipid-protein membrane

Diffusion equations were solved using the method of Laplace transformation to describe the flux of solutes across a model biological membrane. The theory is applicable to obtain either a permeability coefficient or an interfacial transfer rate constant. Previously published data were analyzed using the mathematical functions derived and the magnitude of the interfacial transfer coefficients discussed. These results may prove relevant to the general understanding of passive membrane transport as encountered in many model systems such as black lipid films and liposomes.