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Different stainings of the cartilage.
Notes: (A) H&E staining. (B) Masson staining. (C) Gomori staining. (D) Picrosirius red staining. (E) Safranin O–fast green staining. (F) Toluidine blue staining. (G) Alcian staining. (H) PAS staining. 1) The bioactive resveratrol–PLA–gelatin porous nano-scaffold group. 2) The blank porous PLA–gelatin nano-scaffold group. 3) The no scaffold group. 4) The sham group.
