title: Surface active materials from dog lung. I. Method of isolation.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient; D055598:Chemical Phenomena; D002621:Chemistry; D004285:Dogs; D008722:Methods; D010758:Phosphorus / Q000032:analysis; D011506:Proteins / Q000032:analysis; D011650:Pulmonary Alveoli / Q000032:analysis*; D011663:Pulmonary Surfactants / Q000302:isolation & purification; D013499:Surface Properties; D013501:Surface-Active Agents / Q000302:isolation & purification*
chemical_list: D011506:Proteins; D011663:Pulmonary Surfactants; D013501:Surface-Active Agents; D010758:Phosphorus