Figure 5

Swelling behavior of hydrogels and cumulative drug release in buffers at different pH values. A Swelling behavior of hydrogels in buffers at pH 1.2 and 7.4. B Cumulative release of rPoIFNα/γ from hydrogels in different pH conditions representing gastric fluid (pH 1.2) and intestinal fluid (pH 7.4) at 37 °C. The results are the mean ± standard deviation (n = 3).