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Biophysical Journal 52: 763-774 (1987)
© 1987 the Biophysical Society

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Determination of cell membrane permeability in concentrated cell ensembles.

J A Ochoa, S Whitaker and P Stroeve

Department of Chemical Engineering, University of California at Davis 95616.

ABSTRACT

The method of volume averaging is used to analyze the process of diffusion in concentrated cell ensembles in which significant resistance to mass transfer is caused by the cellular membrane. A general closure scheme is given that allows for direct theoretical prediction of effective diffusivities for any cellular geometry. Numerical results are presented for the classical parallelepiped arrangement used to model cellular systems, and these results are used in conjunction with experimental studies of concentrated cell ensembles to determine membrane permeabilities for solute diffusion in several cellular systems. Membrane permeabilities are compared with predictions from other models of diffusion in cellular systems.






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Copyright © 1987 by the Biophysical Society.