[Comparison of discrete models of charge transfer in thin membranes. III. Unstable conditions, large polarizing voltages].

The validity of one-jump approach to ion transfer through thin membranes is discussed. The detailed analysis is carried out for the transport scheme with slow conformational processes in the membrane volume. It is shown that there exists some difference between stationary and nonstationary values of the transfer coefficient. The second essential feature of this scheme is the appearance of a slight minimum on the relaxation curve with high voltages in the membrane system.