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. Author manuscript; available in PMC: 2013 Jan 17.
Published in final edited form as: Int J Pharm. 2011 Oct 13;422(1-2):341–348. doi: 10.1016/j.ijpharm.2011.10.020

Fig. 4.

Fig. 4

SEM micrographs of formulation 503H (PLGA microspheres and composites) after exposure to PBS (pH 7.4) containing 10 % (v/v) ethanol at 37°C over time: (A, B) day 1 and (C, D) day 10; Symbols: white arrows - “inside-out” degrading PLGA microspheres, grey arrows - porous hydrogel matrix. Top row, microspheres alone. Second row, composites. Scale bar: 20 µm.