Iron Oxide Magnetic Nanoparticles: Characterization and Toxicity Evaluation by In Vitro and In Vivo Assays

Figure 8

Light optical image of the spleen after 48 h exposure to γ-Fe₂O₃ nanoparticles at concentrations of 0.7 mL/kg (b), 1.7 mL/kg (c), and 3.7 mL/kg (d). The reference sample is also presented (a).

(a)

(b)

(c)

(d)