Surface-Active AgentsSurface TensionPulmonary SurfactantsAdsorptionProteolipidsSurface PropertiesPhospholipidsWaterPulmonary Surfactant-Associated Protein BAirPulmonary Surfactant-Associated ProteinsPulmonary Surfactant-Associated Protein AMicrobial Sensitivity TestsPhysical Processes1,2-DipalmitoylphosphatidylcholinePulmonary AlveoliViscosityPulmonary Surfactant-Associated Protein CWetting AgentsAnti-Bacterial AgentsPhosphatidylglycerols