AbsorptionIntestinal AbsorptionSkin AbsorptionSpectrum AnalysisBiological AvailabilitySpectrophotometrySpectrophotometry, AtomicPhotometryX-Ray Absorption SpectroscopyJejunumMicroscopy, InterferenceColorSpectrophotometry, InfraredLightIronOptical PhenomenaSpectroscopy, Fourier Transform InfraredOptics and PhotonicsWaterIntestine, SmallScattering, RadiationX-Ray DiffractionZincSpectrophotometry, UltravioletZinc RadioisotopesAdministration, OralRefractometryPhytic AcidIron RadioisotopesKineticsZinc IsotopesIntestinesFecesDuodenumOptical FibersInfrared RaysTime FactorsIleumMicroscopy, FluorescencePulsatile FlowBiological TransportLightingSpectroscopy, Near-InfraredLymphCaco-2 CellsHydrogen-Ion ConcentrationMalabsorption SyndromesSitosterolsModels, BiologicalSpectrometry, FluorescenceEar CanalIntestinal MucosaFiber Optic TechnologyDietEquipment DesignIron, DietaryLasersSodiumAcoustic Impedance TestsCopperCalcium, DietaryFerrous CompoundsEnterocytesEquipment Failure AnalysisSpectrometry, X-Ray EmissionCross-Over StudiesPhotonsSurface PropertiesCholesterolFluorescenceThinkingCalciumPhytosterolsAzetidinesRetinal PigmentsRabbitsHemoglobinsBiophysicsPerfusionAcousticsPulseReproducibility of ResultsFeathersOptical DevicesPigmentationBiophysical PhenomenaX-RaysSolutionsMathematicsChloridesMicroscopy, ConfocalChromatography, High Pressure LiquidBile Acids and SaltsCattlePulse Wave AnalysisRats, Sprague-DawleyArea Under CurvePigments, BiologicalAdsorptionBicarbonates