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. Author manuscript; available in PMC: 2018 Dec 1.

Published in final edited form as: Pharm Res. 2017 Aug 14;34(12):2663–2674. doi: 10.1007/s11095-017-2237-9

Scanning Electron Microscope of enteric coated BSA beads. Figures A, C, E, G, I (magnification500x) on the left are the surface morphology of BSA layered beads, 10%, 15%, 20%, and 30% enteric coated BSA beads. Figures B, D, F, H and J on the right are the cross sections of beads on the left (magnification 2000x).

Scanning Electron Microscope of enteric coated BSA beads. Figures A, C, E, G, I (magnification500x) on the left are the surface morphology of BSA layered beads, 10%, 15%, 20%, and 30% enteric coated BSA beads. Figures B, D, F, H and J on the right are the cross sections of beads on the left (magnification 2000x).