Research Article

Toxicity Evaluation following Intratracheal Instillation of Iron Oxide in a Silica Matrix in Rats

Figure 9

Light optical image of the lung at 24 h after intratracheal instillation of IOSi-NPs in rats at various concentrations. The reference sample is also presented (a). Lung after 24 hours: control (a), 0.5 mg/kg (b), 2.5 mg/kg (c), and 5 mg/kg (d).
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(a)
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(b)
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(c)
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(d)