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Time stability studies in terms of hydrodynamic diameter and ζ-potential variations of uncoated and of HA-Chol-coated niosomes up to 90 days at 25 °C temperature of storage. Panel (A) sample S2, uncoated and coated (S2 1:1) ; Panel (B) sample S3, uncoated and coated (S3 1:0.5; S3 1:1); Panel (C) sample T, uncoated and coated (T 1:1).
