the activation energy for the transfer of dmso across the surface of the cell was estimated to be 6.0 kcal/mole at 37 degrees c , 6.6 kcal/mole at 25 degrees c and 11.6 kcal/mole at 0 degrees c , indicating either that the equivalent pore radius of the cells decreased with temperature or that the cell permeability represented the sum of two fluxes , one through the aqueous pores of the cell and the other through the lipid phase of the cell membrane , each with a different energy of activation.6 .
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surface of
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cell