Fig. 11

Fe₃O₄ NP’s effect on the quantity of Annexin-V/PI double-positive and Annexin-V positive cells. (a) U266 cells treated with Fe₃O₄ NPs at 0, 75, and 150 µg/ml for 48 h, (b) THP-1 cells treated with Fe₃O₄ NPs at 0, 75, and 150 µg/ml for 48 h, and (c) L-929 cells treated with Fe₃O₄ NPs at 0, and 150 µg/ml for 48 h *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001.