FIGURE 2.

(A) Heating curve of FBH under four cycles of heating and cooling processes. (B) The release curve of SO₂ from FBH after different treatments. (C) Relative OH intensity in cells after treated by different experimental groups (n = 3). (D) Relative SO₂ intensity in cells after treated by different experimental groups (n = 3). (E) The effect of different formulations on the intracellular GSH levels was determined by employing a GSH assay kit (n = 3). (F) Cell viabilities of control group (PBS) and FBH system without NIR irradiation (n = 3). (G)Various treatments’ in vitro cytotoxicity towards 4T1 cells (n = 3). *p < 0.05, **p < 0.01, ***p < 0.005; Student’s t-test.