Cellulose Acetate 398-10 Asymmetric Membrane Capsules for Osmotically Regulated Delivery of Acyclovir

Figure 10

SEM of asymmetric membrane depicting (a) outer dense region and (b) inner porous region before drug release (original magnification at 500x), (c) outer dense region and (d) inner porous region after drug release (original magnification at 500x), (e) inner surface with intentional defect before dissolution and (f) inner surface with intentional defect after dissolution (400x), and (g) transverse section (500x).

(a)

(b)

(c)

(d)

(e)

(f)

(g)