Accession Number : AD0745784

Title :   Transport of Ions of One Kind through Thin Membranes. II. Non-Equilibrium Steady State Behavior.

Descriptive Note : Technical rept.,

Corporate Author : GEORGETOWN UNIV WASHINGTON D C DEPT OF CHEMISTRY

Personal Author(s) : DE Levie,Robert ; Seidah,Nabil G. ; Moreira,Hector

Report Date : 30 JUN 1972

Pagination or Media Count : 37

Abstract : 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. (Author)

Descriptors :   (*MEMBRANES, TRANSPORT PROPERTIES), (*IONS, TRANSPORT PROPERTIES), EQUATIONS OF MOTION, ELECTROCHEMISTRY, MEMBRANES(BIOLOGY), IONS, POTENTIAL ENERGY, ELECTRICAL CONDUCTIVITY, EQUILIBRIUM(PHYSIOLOGY)

Subject Categories : Biochemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE