Fig. 4From: More natural more better: triple natural anti-oxidant puerarin/ferulic acid/polydopamine incorporated hydrogel for wound healingBiocompatibility of hydrogels. Proliferation of the cells cultured with the extracted liquids of hydrogels on different days (A). Calcein-AM/PI staining on different days after the cells were co-cultured with hydrogels (B; Scale bar is 100 μm). NS: no significanceBack to article page