Dynamic Irradiation Chamber Tests of Automotive Exhaust

摘要

As part of an intensive study by government and private agencies the U. S. Public Health Service has built an irradiation chamber facility for investigation of irradiated auto exhaust under mixing conditions similar to those in the atmosphere. The facility consists of a programmed continuous-cycling chassis dynamometer, an exhaust dilution system, a dilution-air purification system, two irradiation chambers, and exposure facilities for evaluation of bacteria kill, plant damage, and various effects on small animals. Of the three variables studied during the first test series, the exhaust concentration at the start of irradiation appeared to produce the most significant effects. Fuel composition had a lesser influence. Very little difference was noted in the effects produced at two different average irradiation times. (Author)