{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,6]],"date-time":"2026-03-06T18:21:10Z","timestamp":1772821270563,"version":"3.50.1"},"reference-count":14,"publisher":"American Public Health Association","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Am J Public Health"],"published-print":{"date-parts":[[1983,1]]},"abstract":"<jats:p> Twenty-four asthmatic subjects in Denver were followed from January through March 1979, a three-month period in which Denver air pollution levels are generally high and variable. Dichotomous, virtual impactor samplers provided daily measurements (micrograms\/m3) of inhaled particulate matter (total mass, sulfates, and nitrates) for coarse (2.5--15 micrograms in aerodynamic diameter) and fine fractions (less than 2.5 micrometers). Carbon monoxide, sulfur dioxide, ozone, temperature, and barometric pressure were also measured. Twice daily measurements of each subject's peak expiratory flow rates, use of as-needed aerosolized bronchodilators, and report of airways obstruction symptoms characteristic of asthma were tested for relationships to air pollutants using a random effects model across subjects. During the time actually observed, there were very few days in which high levels of suspended particulates were recorded. Of the environmental variables studied, only fine nitrates were associated with increased symptom reports and increased aerosolized bronchodilator usage. <\/jats:p>","DOI":"10.2105\/ajph.73.1.50","type":"journal-article","created":{"date-parts":[[2008,11,27]],"date-time":"2008-11-27T05:16:35Z","timestamp":1227762995000},"page":"50-56","source":"Crossref","is-referenced-by-count":37,"title":["Effects of particulate air pollution on asthmatics."],"prefix":"10.2105","volume":"73","author":[{"given":"G B","family":"Perry","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H","family":"Chai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D W","family":"Dickey","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R H","family":"Jones","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R A","family":"Kinsman","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C G","family":"Morrill","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S L","family":"Spector","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P C","family":"Weiser","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"844","reference":[{"key":"p_1","unstructured":"Farr RS, Spector SL: What is asthma? In: Petty TL (ed): The Asthmatic Patient in Trouble, Greenwich, CT, Upjohn, 1975."},{"key":"p_2","first-page":"22","volume":"4","author":"Shy CM","year":"1978","journal-title":"J Thorac Soc News"},{"key":"p_3","doi-asserted-by":"publisher","DOI":"10.1001\/jama.1979.03300110035023"},{"key":"p_4","doi-asserted-by":"publisher","DOI":"10.1093\/oxfordjournals.aje.a112836"},{"key":"p_5","unstructured":"Dzubay TG, Stevens RK: Application of the dichotomous sampler to the characterization of ambient aerosols. In: Dzubay TG (ed): X-ray Fluorescence Analysis of Environmental Samples. Ann Arbor, MI: Ann Arbor Science, 1977."},{"key":"p_6","doi-asserted-by":"crossref","unstructured":"Loo BW, Jakeivic JM, Goulding FS: Dichotomous virtual impactors for large scale monitoring of airborne particulate matter. In: Liv BYH (ed): Fine Particles. 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New York: Wiley, 1958."},{"key":"p_12","doi-asserted-by":"publisher","DOI":"10.2105\/AJPH.70.7.687"},{"key":"p_13","doi-asserted-by":"publisher","DOI":"10.2307\/2530111"},{"key":"p_14","doi-asserted-by":"publisher","DOI":"10.1016\/0091-6749(75)90107-4"}],"container-title":["American Journal of Public Health"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/ajph.aphapublications.org\/doi\/pdf\/10.2105\/AJPH.73.1.50","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,5,9]],"date-time":"2022-05-09T18:19:15Z","timestamp":1652120355000},"score":1,"resource":{"primary":{"URL":"https:\/\/ajph.aphapublications.org\/doi\/full\/10.2105\/AJPH.73.1.50"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1983,1]]},"references-count":14,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1983,1]]}},"alternative-id":["10.2105\/AJPH.73.1.50"],"URL":"https:\/\/doi.org\/10.2105\/ajph.73.1.50","relation":{},"ISSN":["0090-0036","1541-0048"],"issn-type":[{"value":"0090-0036","type":"print"},{"value":"1541-0048","type":"electronic"}],"subject":[],"published":{"date-parts":[[1983,1]]}}}