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SEM microphotographs showed populations of spherical nanoparticles for both formulations (CS/TCS: 0.5 mg/ml, SA: 0.625 mg/mL). A: FITC-loaded CS-SA NPs; B: FITC-loaded TCS-SA NPs. Regular surfaces could be observed for both formulations and no important differences were denoted between the different formulations analyzed.
