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Preparation of PLGA/TA microspheres, ChCo‐TAMS and evaluation of the drug release in vitro (A) Morphological observations of the prepared PLGA/TA microspheres via optical microscopy and SEM scanning; the red arrows indicated the encapsulated TA particles. (B) Morphological observations of the ChCo‐TAMS scaffolds via optical microscopy and SEM scanning. (C, D) The long‐term release of TA from PLGA/TA microspheres or ChCo‐TAMS at various PH conditions in vitro
