Abstract
Abstract The diffusion through cellulose acetate membranes of d -glucose dissolved in water, dimethyl sulfoxide mixed solvents has been measured. A new diffusion cell using polarimetry is described. The mixed solvent system has a maximum viscosity at about 0.35 mol fraction DMSO. The permeability constant decreases with an increase in DMSO content and in solvent viscosity. At the viscosity-maximum composition the permeability constant is seen to decrease steadily in time. Beyond this maximum at higher DMSO concentrations the membrane disintegrates. The inhibitory influence of DMSO on glucose transport probably involves both a viscosity and a membrane-damage effect.
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