Pulmonary SurfactantsSurface-Active AgentsPulmonary Surfactant-Associated Protein APulmonary Surfactant-Associated ProteinsSurface TensionProteolipidsPulmonary Surfactant-Associated Protein DPulmonary Surfactant-Associated Protein BPulmonary Surfactant-Associated Protein CLung1,2-DipalmitoylphosphatidylcholinePulmonary AlveoliRespiratory Distress Syndrome, NewbornBiological ProductsPhospholipidsPhosphatidylglycerolsCetrimonium CompoundsMicellesBronchoalveolar Lavage FluidSurface PropertiesAdsorptionPhosphatidylcholinesFatty AlcoholsPolysorbatesLung ComplianceEmulsionsAirRNA, MessengerCells, CulturedWaterMolecular Sequence DataBronchoalveolar LavageTime FactorsMutationPneumocytesMacrophages, AlveolarPolyethylene GlycolsKineticsSodium Dodecyl SulfatePoloxamerRats, Sprague-DawleyDioctyl Sulfosuccinic AcidRespiratory Distress Syndrome, AdultCell LinePoloxaleneSolubilityInstillation, DrugFluorine CompoundsRabbitsAmino Acid SequenceLipidsQuaternary Ammonium CompoundsMice, Inbred C57BLLipid MetabolismLung DiseasesCattleColloidsMice, KnockoutCollectinsGlycoproteinsMicroscopy, ElectronDisease Models, AnimalApoproteinsOilsModels, BiologicalInfant, NewbornFluorocarbonsBiological TransportBase SequenceTemperatureMeconium Aspiration SyndromePhosphorylcholineHydrophobic and Hydrophilic InteractionsDose-Response Relationship, DrugLiposomesHydrogen-Ion ConcentrationMice, TransgenicRespiration, ArtificialMicroscopy, FluorescenceSwineParticle SizeProtein BindingBlotting, WesternAnimals, NewbornSignal TransductionFetal Organ MaturityLiverGene Expression RegulationMacrophagesViscosityCell NucleusImmunohistochemistrySolutionsRecombinant ProteinsTissue DistributionMembranes, ArtificialGene ExpressionTranscription, GeneticGene Expression Regulation, PlantEpithelial Cells