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- W308614095 abstract "Asthmatic volunteers aged 8 to 16 (N = 34) were exposed on separate occasions to clean air (control), to 0.30 ppm nitrogen dioxide (NO2) in otherwise clean air, and to polluted Los Angeles area ambient air on summer mornings when NO2 pollution was expected. Exposures lasted 3 hr, with alternating 10-min periods of exercise and rest. In ambient pollution exposures, 3-hr average NO2 concentrations ranged from 0.01 to 0.26 ppm, with a mean of 0.09 ppm. Ambient exposures did not significantly affect lung function, symptoms, or bronchial reactivity to cold air, relative to the control condition. Responses to 0.3 ppm NO2 exposures were equivocal. Asthma symptoms were more severe during 1-week periods before 0.3 ppm exposures, and lung function was decreased immediately before 0.3 ppm exposures, compared to other conditions. Lung function declined slightly during the first hour at 0.3 ppm, but improved over the remaining 2 hr. Compared to other conditions, symptoms were not increased during 0.3 ppm exposures, but were increased during 1-week periods afterward. These observations may reflect untoward effects of 0.3 ppm NO2, or may reflect chance increases in asthma severity prior to 0.3 ppm exposures." @default.
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- W308614095 date "1985-12-01" @default.
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- W308614095 title "Experimental Exposures of Young Asthmatic Volunteers to 0.3 Ppm Nitrogen Dioxide and to Ambient Air Pollution" @default.
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- W308614095 doi "https://doi.org/10.1177/074823378900500610" @default.
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