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Changes of the hydrodynamic diameter for liposomes during lyophilization. Liposomes with 0%, 5% and 10% of incorporated stearylamine were studied in the presence and absence of sucrose (upper) or mannitol (lower) used as cryoprotectants. *Pre: liposomal size prior to lyophilization; No sugar: liposomal size after lyophilization without cryoprotectants.
