Sulfuric acid-layered ultrafine particles potentiate ozone-induced airway injury.

Urban air pollution in the United States is composed of a complex mixture of particles and gases. Among the most prominent products of the atmospheric pollutants are sulfur oxides and ozone. In this report, we use two exposure protocols to examine the interaction between exposure to these two pollutants.

Pulmonary effects of ultrafine coal fly ash inhaled by guinea pigs.

Guinea pigs were exposed to ultrafine coal fly ash produced in a laboratory furnace. The average mass median aerodynamic diameter and the average mass concentration of Illinois no. 6 fly ash produced in all exposure conditions were 0.

Functional changes in the lungs of guinea pigs exposed to sodium sulfite aerosols.

Guinea pigs were exposed head only for 1 hr to submicrometer sodium sulfite aerosols (mass median aerodynamic diameter = 0.36 micron, sigma g = 2.96) at 474, 669, and 972 micrograms SO3(2-)/m3.