Ureaalpha-FetoproteinsFetusFetal ProteinsProtein DenaturationBlood Urea NitrogenAmmoniaKidney Concentrating AbilityUreaseNitrogenOsmolar ConcentrationProtein FoldingPhloretinCircular DichroismAnilino NaphthalenesulfonatesDiuresisKidney MedullaAnimal FeedDietary ProteinsAnimal Nutritional Physiological PhenomenaSpectrometry, FluorescenceThermodynamicsKidneyMethylaminesDehydrationCreatinineAmino AcidsProtein ConformationHydrogen-Ion ConcentrationSwineDialysis SolutionsMembrane Transport ProteinsRenal DialysisEnzyme StabilityUrineWater-Electrolyte BalanceVasopressinsWaterKineticsSodium ChlorideNutritional RequirementsDigestionWeight GainCattleTemperatureSpectrophotometry, UltravioletKidney Failure, ChronicTime FactorsSodiumSheepDietRandom AllocationHot TemperatureProtein Structure, SecondaryBody WeightOrgan SizeLiverBlood GlucosePotassiumEscherichia coliDose-Response Relationship, DrugElectrophoresis, Polyacrylamide GelModels, MolecularBiological Markers