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. 2021 Dec 27;14(1):50. doi: 10.3390/pharmaceutics14010050

Figure 2.

Figure 2

Sol-gel transition was tested by an inverting vial method (A) and a stirrer method (B); (C) phase diagrams of 2–20 w/v% copolymer aqueous solution (“■” gelation occurred, “🞑” solution condition); (D) Cryo-SEM image of the copolymer.