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Characterization of VP5-NPs by differential scanning calorimetry (DSC), in vitro release and stability. (a) DSC curves of free VP5, blank nanoparticles, the physical mixture of VP5 and blank nanoparticles, and VP5-NPs; (b) Release profiles of free VP5 and VP5-NPs in different phosphate buffers (pH 1.0, 6.8 and 7.4); (c) Change in size and EE% of VP5-NPs in 2 weeks.
