Pulmonary SurfactantsPneumocytesSurface-Active AgentsPulmonary AlveoliPulmonary Surfactant-Associated Protein APulmonary Surfactant-Associated ProteinsLungProteolipidsPulmonary Surfactant-Associated Protein CJaagsiekte sheep retrovirusPulmonary Surfactant-Associated Protein BSurface TensionPulmonary Adenomatosis, OvinePlutonium1,2-DipalmitoylphosphatidylcholinePhosphatidylcholinesPulmonary Surfactant-Associated Protein DMacrophages, AlveolarTanninsRespiratory MucosaPhosphatidylglycerolsLung Diseases, InterstitialLung DiseasesEpithelial CellsAdenocarcinoma, Bronchiolo-AlveolarMicroscopy, ElectronCells, CulturedPhospholipidsLung NeoplasmsAirEpitheliumImmunohistochemistryRats, Sprague-DawleySheepAdsorptionSurface PropertiesPneumoniaHyperplasiaPulmonary FibrosisRespiratory Distress Syndrome, NewbornBiological ProductsRats, WistarBronchoalveolar Lavage FluidCytoplasmic GranulesRNA, MessengerTime FactorsApoproteinsCell LineMembranes, ArtificialVernix CaseosaDiquatRespiratory Distress Syndrome, AdultPressureCattleLung ComplianceSwineMeconium4-Chloro-7-nitrobenzofurazanMolecular Sequence DataWaterCollectinsBlood-Air BarrierLipid BilayersLauratesLiposomesGlycoproteinsLipidsPulmonary Alveolar ProteinosisAmino Acid SequenceCollagen Type IIFetal Organ MaturityHyaline Membrane DiseaseFetusMicroscopy, Atomic ForceRespiratory AspirationQuartzBronchoalveolar LavageRabbitsBiophysical PhenomenaPhase TransitionTemperature2-NaphthylamineBiophysicsAmniotic FluidInfant, NewbornAntipainNanotubes, CarbonCetrimonium CompoundsSilicon DioxideCalorimetry, Differential ScanningPalmitic AcidPorphobilinogenMicroscopy, FluorescenceMicelles