Assay of breath carbon-14 dioxide of humans using ionization chambers.
D001681:Biological Assay; D002245:Carbon Dioxide / Q000032:analysis*; D002250:Carbon Radioisotopes; D019069:Cell Respiration; D006801:Humans; D017601:Oxygen Compounds; D012119:Respiration
D002250:Carbon Radioisotopes; D017601:Oxygen Compounds; D002245:Carbon Dioxide
CARBON DIOXIDE/determination; RESPIRATION