title: Respiratory responses of humans exposed to an aerosol-gas pollutant mixture: multivariate contrast of a complex atmosphere to clean air and sodium chloride aerosol controls.
abstract: Data from a group of 20 subjects with normal baseline pulmonary function, who were exposed for 2 h to a test atmosphere containing a complex mixture of pollutants, have been contrasted with data from two other groups exposed to presumably non-toxic control atmospheres. Group 1 was exposed to clean air, group 2 was exposed to clean air containing sodium chloride aerosol at 270 micrograms m-3, and group 3 was exposed to the complex atmosphere containing sodium chloride (332 micrograms m-3) and zinc ammonium sulfate (23 micrograms m-3) aerosols plus nitrogen dioxide (0.5 ppm) and sulfur dioxide (0.5 ppm). These atmospheres (ranked according to the presumed relative toxicities of the components; clean air = 0, sodium chloride = 1, complex mixture = 2) were contrasted using multiple regression and partial correlation analyses. The effects of exposure to the complex gas-aerosol mixture on forced expiratory performance were not significantly different from those observed in subjects exposed to clean air or to sodium chloride aerosol.
mesh_terms: D000293:Adolescent; D000328:Adult; D000336:Aerosols; D000368:Aged; D000395:Air Pollutants, Occupational / Q000633:toxicity*; D005260:Female; D005541:Forced Expiratory Volume; D005740:Gases / Q000633:toxicity*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009609:Nitrous Oxide / Q000633:toxicity; D012119:Respiration / Q000187:drug effects*; D012965:Sodium Chloride / Q000494:pharmacology; D013458:Sulfur Dioxide / Q000633:toxicity; D014797:Vital Capacity
chemical_list: D000336:Aerosols; D000395:Air Pollutants, Occupational; D005740:Gases; D013458:Sulfur Dioxide; D012965:Sodium Chloride; D009609:Nitrous Oxide