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Mean concentration of 14C-SiNP (33 nm) in urine and feces, over a 24 h sampling time, following single 0.5 mg intravenous administration to BALB/c male mice. Data are expressed as μg of 14C-SiNP/ml of urine and μg of 14C-SiNP/gm of feces. Results are the mean of 5 animals ± the standard error of the mean.
