Fig. 8

Kinetic of cell death in the NCs + SW experiment in Colo 320DM cells. Luminescence (A) is expressed as relative light units (RLU), and fluorescence (B) is expressed as relative fluorescence units (RFU), measurements. Colo 320DM cells were considered alone (CT), treated with 10 μg/ml NCs for 24 h (ZnO NCs or Fe:ZnO NCs), treated with SW alone (SW), or incubated with NCs and then treated with SW (ZnO NCs + SW and Fe:ZnO NCs + SW). The two signals were recorded before SW exposure (before SW), immediately after SW administration (0 min), and several time points after the SW treatment (30 min, 1 h, 2 h, 4 h, 6 h and 24 h)