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XRD spectra of PLGA, CS, DS, DS-PLGA, and CS-DS-PLGA. The characteristic diffraction peaks of drug at 14.90, 20.74, 25.96, 26.82 and 27.70 at 2θ values are clearly observed in DS-PLGA and CS-DS-PLGA nanoparticles. PLGA nanoparticles and chitosan powder showed no distinct peak which indicates the amorphous nature of these polymers.
