Fig. 4

Cell viability of (a) MCF-7; (b) SKBR-3; (c) MDA-MB-231 and; (d) MCF-10 cell lines incubated with the Fe₃O₄ and; (b) Fe₃O₄@ FROP-1 NPs in different concentrations (0/control, 0.05, 0.1, 0.3, 0.5, 1, and 2 mM) at 24 h at 37 °C (n = 8, p < 0.05)