Fig. 3

The change in absorbance of PVA-Tyr during hematin/H₂O₂–mediated polymerization in PBS at 37 °C at 325 nm via UV-vis spectrophotometry over time with a varying hematin (% w/w) and constant H₂O₂ (6 mM) or b constant hematin (0.06 % w/w) and varying H₂O₂ (mM). After gelation, hydrogels were swollen and the c mass loss, d swelling, and e dynamic shear modulus (G*) were measured after 48 h at 37 °C. Data in a and b were presented to 60 min because there was no further absorbance increase after this time. Significance (p < 0.05) is denoted in bar graphs C-E with an asterisk (*)