The Journal of Membrane Biology

, Volume 10, Issue 1, pp 171–192 | Cite as

Transport of ions of one kind through thin membranes

II. Nonequilibrium steady-state behavior
  • R. de Levie
  • N. G. Seidah
  • H. Moreira


The equation for steady-state movement of ions of one kind through planar membranes has been solved. Numerical results are given, as well as profiles of potential, field and concentration. For small deviations from the equilibrium potential, an essentially constant intrinsic membrane conductance is obtained, which can be calculated from equilibrium properties. For larger deviations from equilibrium, the intrinsic membrane conductance is still essentially constant for symmetrical interfacial concentrations of the permeable ion, but varies significantly with potential for asymmetric interfacial concentrations, especially if these concentrations are small. In the latter case, one can often use the constant field approximation, for which explicit expressions are presented.


Small Deviation Human Physiology Explicit Expression Field Approximation Equilibrium Potential 
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Copyright information

© Springer-Verlag New York Inc 1972

Authors and Affiliations

  • R. de Levie
    • 1
  • N. G. Seidah
    • 1
  • H. Moreira
    • 1
  1. 1.Department of ChemistryGeorgetown UniversityWashington, D. C.

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