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Forward scattering signal of A549 and NIH/3T3 cells. (a) Histogram of FSC signal with 0 µg mL−1 and 25 µg mL−1 FITC-TiO2 and 24 h incubation (NIH/3T3); (b) Histogram of FSC signal after 0 h and 24 h incubation of 12.5 µg mL−1 FITC-TiO2 (NIH/3T3); (c) Forward scatter after incubation with different FITC-TiO2 NPs concentrations (24 h incubation); (d) Uptake kinetic of FITC-TiO2 NPs (12.5 µg mL−1).
