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A) TEM analysis of 80×320 nm, 80×180 nm, 55×70 nm and 200×200 nm PLGA particles. B) sRecE was adsorbed to the PLGA nanoparticles in variable sRecE/PLGA (w/w%) ratios. Increasing sRecE/PLGA ratios were obtained by fixing sRecE and decreasing the particle mass. Adsorption efficiency was determined by the amount of non-adsorbed sRecE after the spinning down the particles.
