Figure 4.

Cumulative release profiles of recrystallized catechin while being incubated in (a) PBS and (b) PBS containing 0.2 mM H₂O₂. (c) Release profiles and (d) The release rate of catechin recrystallized with PEI-diselenide in the PBS with different concentrations of H₂O₂. The dissolution rate of catechin crystals was calculated by fitting the cumulative amounts of catechin released between 1 and 48 h. (e) Cumulative release profiles of recrystallized catechin when exposed to 0.2 mM H₂O₂ solution after 1 day. All samples were incubated at 37 °C. Data points and error bars represent mean values and standard deviation of 3 samples per condition, respectively.