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Physical properties of AM gel. (A) Rheological analysis of the AM gel. Storage (G′) and loss (G″) moduli as a function of the frequency demonstrated an effective cross-linking of AM gel, n = 3. (B) Compressive stress–strain characterization of AM gel. (C) Swelling ratio from 6 h to 48 h, n = 3. (D) Mass retention during in vitro degradation of AM gel and representative photographs of morphology changes, n = 3. (E) Temporal and cumulative release of melatonin from AM gel, n = 3
