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a: Spheric PLGA micro particles loaded with Mibefradil (Canon Powershot G6 Digicam, 4x optical zoom). b: Capsule tension ring with fixed spheric PLGA micro particles loaded with Mibefradil. The indicated area is seen in the next image below. c: Magnified view of the indicated area (in b) of the tension ring: scanning electron microscopic image of Mibefradil containing PLGA micro particles. d: Transmission electron microscopic image of Mibefradil containing PLGA micro particles.
