title: Mineral and nitrogen metabolic studies on Skylab orbital space flights.
mesh_terms: D002118:Calcium / Q000032:analysis / Q000652:urine; D003404:Creatinine / Q000652:urine; D004032:Diet; D004435:Eating; D005243:Feces / Q000737:chemistry; D005502:Food; D006801:Humans; D006909:Hydroxyproline / Q000652:urine; D008903:Minerals / Q000378:metabolism*; D009141:Musculoskeletal System / Q000503:physiopathology; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism* / Q000652:urine; D010758:Phosphorus / Q000032:analysis / Q000378:metabolism / Q000652:urine; D013026:Space Flight
chemical_list: D008903:Minerals; D010758:Phosphorus; D003404:Creatinine; D009584:Nitrogen; D006909:Hydroxyproline; D002118:Calcium