Effects of carcinogen dose on the charac
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Tsutomu Yarita; Paul Nettesheim
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Article
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1978
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John Wiley and Sons
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French
β 513 KB
## Abstract Tracheal tumors were induced by repeated intratracheal exposures to the carcinogen __N__βnitrosoβ__N__βmethylurea (NMU), using a catheter system previously described. Carcinogen concentrations of 0.25, 0.50 and 1.0% were employed in 20 or 30 twiceβweekly exposures. Most of the tumors de