title: [Bacteriological studies of the feces from methane-producers and nonproducers in the expired air].
mesh_terms: D000328:Adult; D001431:Bacteriological Techniques; D019605:Euryarchaeota / Q000302:isolation & purification* / Q000378:metabolism; D005243:Feces / Q000382:microbiology*; D005260:Female; D005767:Gastrointestinal Diseases / Q000382:microbiology; D006801:Humans; D008297:Male; D008697:Methane / Q000032:analysis* / Q000096:biosynthesis; D008875:Middle Aged; D012123:Pulmonary Ventilation; D012119:Respiration
chemical_list: D008697:Methane