摘要：In order to clarify the influences of particulate substances produced by studded tires of automobiles on human health, the investigation was made on the mutagenicity and benzo (α) pyrene (B (α) P) contents in soils collected at road-sides of Sendai city in March and August, 1981. B (α) P contents in March (0.04-0.5 μg/g soil) were higher than that in August (0.04-0.11μg/g soil), while the mutagenic activity of soils to S. typhimurium TA98 with S9 mix in March were much lower than that in August. The influences of extract of road-coating-asphalt to the mutagenicity of B (α) P and AF-2 were studied to clarify the above results of contradiction. The organic substances in particulates of road-coating-asphalt produced on a large scale by studded tires of automobiles in winter were found to have a suppressing effects on the mutagenic activity of B (α) P. As this suppression was not observed in case of AF-2, the inhibition of the activity of S9 by the extract of road-coating-asphalt may be involved in the above experimental results.
