1985 Volume 20 Issue 6 Pages 463-469
Airborne particulates in Maebashi and Minato-ku Tokyo were collected on quartz-fiber filters using highvolume air samplers for 15 days in each month, Oct. 1983, Jan. Apr. and Jul. 1984. The mutagenicities of airborne particulates were evaluated by the pre-incubation method using Salmonella typhimurium TA100 and TA98 strains with and without S-9mix. The mutagenicities of airborne particulates in Maebashi were measured at Gunma Institute of Public Health, and those in Minato-ku were measured at National Institute of Public Health.
The mutagenicities of airborne particulates in Minato-ku were corrected with the factors which were calculated by measuring independently the same extracts of airborne particulates at two laboratories. The mutagenicities of airborne particulates in Minato-ku were higher than those in Maebashi for two strains. Seasonal variations of mutagenicities were observed. The mutagenicities in Minato-ku decreased in the order of winter>fall>spring>summer, whereas those in Maebashi decreased in the order to fall-spring>winter-summer. The difference between the seasonal variations in two areas was resulted that the seasonal wind might contribute to the mutagenicities in Maebashi.
