resting rats exposed to a complex gas/aerosol atmosphere composed of the above o3 and no2 concentrations , plus 5 ppm ( 13.1 mg/m3 ) sulfur dioxide ( so2 ) and an aerosol of insoluble colloidal fe2o3 with an aerosol of manganese , ferric , and ammonium salts , demonstrated increased permeability at 1 and 24 h after exposure .
C0017110
gas
C0038777
so2