Pulmonary SurfactantsSurface-Active AgentsInfant, NewbornPulmonary Surfactant-Associated Protein APulmonary Surfactant-Associated ProteinsAnimals, NewbornSurface TensionProteolipidsPulmonary Surfactant-Associated Protein BPulmonary Surfactant-Associated Protein DPulmonary Surfactant-Associated Protein CInfant, Newborn, DiseasesRespiratory Distress Syndrome, NewbornLungPulmonary Alveoli1,2-DipalmitoylphosphatidylcholineNeonatal ScreeningBiological ProductsPhosphatidylglycerolsCetrimonium CompoundsPhospholipidsMicellesBronchoalveolar Lavage FluidSurface PropertiesAdsorptionLung ComplianceFatty AlcoholsPolysorbatesPhosphatidylcholinesEmulsionsAirPregnancyInfant, PrematureBronchoalveolar LavageGestational AgePneumocytesWaterMacrophages, AlveolarSodium Dodecyl SulfatePoloxamerDioctyl Sulfosuccinic AcidPolyethylene GlycolsRespiratory Distress Syndrome, AdultMeconium Aspiration SyndromePoloxaleneSwineFluorine CompoundsRespiration, ArtificialInstillation, DrugLung DiseasesFetusCollectinsFluorocarbonsColloidsFetal Organ MaturitySolubilityMeconiumQuaternary Ammonium CompoundsHyaline Membrane DiseaseOilsApoproteinsRats, Sprague-DawleySheepPhosphorylcholineAmniotic FluidInfant CareGlycoproteinsBronchopulmonary DysplasiaCattleHydrophobic and Hydrophilic InteractionsTime FactorsLipidsTidal VolumeRabbitsIntensive Care Units, NeonatalViscositySolutionsInfant, Premature, DiseasesMembranes, ArtificialFetal BloodNitrosomethylurethaneParticle SizePulmonary Gas ExchangeAsphyxia NeonatorumRespiratory MechanicsBirth WeightLiposomesLung InjuryIntensive Care, NeonatalPhase TransitionChemistry, PharmaceuticalTherapeutic IrrigationLauratesOxygenHyperoxiaRNA, MessengerMicroscopy, ElectronLipid BilayersRespiratory MucosaCells, Cultured