title: Apparatus to reduce trace nitrous oxide contamination in the dental operatory.
mesh_terms: D000393:Air Pollutants; D000395:Air Pollutants, Occupational; D000397:Air Pollution / Q000517:prevention & control; D000766:Anesthesia, Dental / Q000295:instrumentation; D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D009609:Nitrous Oxide / Q000008:administration & dosage*
chemical_list: D000393:Air Pollutants; D000395:Air Pollutants, Occupational; D009609:Nitrous Oxide