title: [Monitoring trace organic components of human expired air and observation of their variability].
authors.forename: B L
authors.initials: BL
authors.lastname: Yu
mesh_terms: D000096:Acetone / Q000032:analysis; D000328:Adult; D000388:Air / Q000032:analysis*; D018504:Ecological Systems, Closed; D000431:Ethanol / Q000032:analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D012119:Respiration
chemical_list: D000096:Acetone; D000431:Ethanol