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. 2008 May 21;116(10):1294–1299. doi: 10.1289/ehp.11021

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(A) HES staining of lung slices prepared from rats instilled with 5 mg SRM1648 12 hr or 72 hr before euthanization: representative light micrographs of three independent experiments. Arrows indicate the presence of particles. (B) Relaxant effect of ACh in intrapulmonary arteries from rats instilled with saline, 5 mg SRM1648, or 5 mg fTiO₂ 12 hr before euthanization. Data are mean ± SE from three to seven rats. NS, not significant.

*p < 0.05.