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Time-dependent swelling behavior of HAGA10-HAMA15 and HAGA20-HAMA gels (n = 10, the error bars indicate the SD) as a response to different pH (5–8). The swelling ratio of hydrogels (A) HAGA10-HAMA15 and (B) HAGA20-HAMA15. The hydrogels before and after swelling are shown here as examples, 1 cm2 grid scale.
