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Figure 4. Heating curves of PBS, agarose hydrogels, and gelatin porous scaffolds without Fe₃O₄ NPs (A) and containing 5 mg mL^-1 Fe₃O₄ NPs (B), 10 mg mL^-1 Fe₃O₄ NPs (C), and 20 mg mL^-1 Fe₃O₄ NPs (D) during AMF irradiation.