Fig. 1From: Synergistic effect of chitosan-alginate composite hydrogel enriched with ascorbic acid and alpha-tocopherol under hypoxic conditions on the behavior of mesenchymal stem cells for wound healingAppearance of the hydrogels: a1 AA-loaded hydrogel (left), a2 TP-loaded hydrogel (right). b The inverted light microscopy image of the hydrogel after cross-linking with CaCl2Back to article page