Potasslun ferrocyanide is encapsulated in the aqueous cavity of spherical phospholipid bilayer vesicles (Ilposomes) at concentrations of approximateiy 10 'moiecuies/liposome. Physlcai parameters and staMiity of these structures are detennined by electrochemical and spectroscopk methods. The eiectroactive marker ions (ferrocyanide) are released from within the liposome by either the additlon of surfactant or the complement lysis of the ...