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Optical microscopy (a and b) and SEM (c and d) images of curcumin-loaded PLGA microparticles prepared by conventional solvent evaporation and homogenization technique. (a and c) After washing with water. (b and d) After washing with 10% (w/v) Tween 80. For (a and b), magnification is 400× and bar is 10 μm. For (c and d), magnification is 5000× and bar is 10 μm.
