1,2-DipalmitoylphosphatidylcholinePulmonary SurfactantsLipid BilayersCalorimetry, Differential ScanningLiposomesMolecular ConformationProteolipidsMembrane FluidityMembranes, ArtificialPhosphatidylcholinesPhase TransitionPulmonary Surfactant-Associated Protein APhosphatidylglycerolsPulmonary Surfactant-Associated ProteinsGelsBiophysicsWaterDimyristoylphosphatidylcholineBiophysical PhenomenaPhospholipidsTemperatureDiphenylhexatrieneThermodynamicsSurface PropertiesAirModels, ChemicalPressureSurface TensionX-Ray DiffractionTetraphenylborateMelittenLiquid CrystalsPulmonary Surfactant-Associated Protein BMembrane LipidsPhosphatidylethanolaminesComplex MixturesSpectroscopy, Fourier Transform InfraredCalorimetryCholesterol4-Chloro-7-nitrobenzofurazanMicroscopy, Atomic ForceSphingomyelinsSpectrophotometry, InfraredDeuteriumSpin Labels2-NaphthylamineAdsorptionPhospholipases A2Scattering, RadiationMolecular StructureMagnetic Resonance SpectroscopyPhosphatidylserinesPhospholipid EthersFluorescence PolarizationPhospholipasesModels, MolecularSpectrometry, FluorescenceLauratesKineticsComputer SimulationGramicidinErgosterolPhospholipases ASolutionsMembranesStatic ElectricityMicellesElectron Spin Resonance SpectroscopyPhysicochemical PhenomenaChemistry, PhysicalLipidsFatty AlcoholsMotionSurface-Active AgentsPulmonary AlveoliPermeabilityFluorescent DyesMembrane MicrodomainsMicroscopy, FluorescenceStructure-Activity RelationshipDiffusionCholineMathematicsHydrogen BondingFluoresceinsDrug CarriersSwineLungParticle SizeModels, TheoreticalModels, BiologicalCrystallization