Fig. 4.
(a) Degradation of PMAA hydrogels (hydrogels) and BA-TPQ-hydrogel cubes (BA-TPQ-hydrogels) in the presence of 5mM glutathione (GSH) at pH = 7.4 (PBS, 37 °C) monitored using fluorometry (λ=700 nm). (b) Cumulative release of BA-TPQ (%) from BA-TPQ-hydrogel cubes at 20 °C (pH=7.4), 37 °C (pH =2, 5 or 7.4) and 37 °C in the presence of 5 mM GSH (pH = 7.4) as monitored by UV-vis spectroscopy.