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(a) Schematic representation of the experimental setup to prepare antioxidant materials used for 3D printed meshes. (b) Photographs of poly(lactic) acid (PLA) and PLA-coated pellets. (c) Lignin (LIG) and tetracycline (TC) containing squares fabricated using 3D printing. Reprinted from Ref. [39] with permission from MDPI.
