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(a) Representative photographs of the sol−gel transition of HAGMA inside a test tube and of formed HHA after its removal from the tube. Elastic (G′) and viscous (G″) modulus as a function of time of UV light irradiation of the (b) HHA and NPHHA, (c) HAG0.5 and NPHAG0.5, and (d) HAG1 and NPHAG1. (e) Gelation time of the hydrogels obtained at the crossing point of modules G′ and G″.
