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Biophysical Journal 11: 603-616 (1971)
© 1971 the Biophysical Society

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Studies with Composite Membranes

I. Preparation and Measurement of Impedances

N. Lakshminarayanaiah and Fasih A. Siddiqi

ABSTRACT

Simple and composite membranes have been prepared from 2% collodion solutions containing different amounts of polystyrenesulfonic acid (PSSA). Various membrane parameters such as water content, electrolyte uptake, exchange capacity, and permselectivity of these membranes have been determined. The resistance and capacitance of simple membranes have been measured as functions of both external electrolyte concentration and internal fixed charge density. The impedance characteristics of composite membranes also have been determined and discussed in terms of the resistance and capacitance characteristics of simple membranes from which the composite structures have been formed.






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Copyright © 1971 by the Biophysical Society.