SkinKeratinocytesUltraviolet RaysMelanocytesFibroblastsEpidermisSkin NeoplasmsCells, CulturedSkin AgingDose-Response Relationship, RadiationAdipose Tissue, BrownAdipocytes, BrownEmbryo, MammalianThermogenesisSkin Physiological PhenomenaEmbryo, NonmammalianChick EmbryoSkin, ArtificialMastoidDermisSkin DiseasesSkin PigmentationEmbryo ImplantationEnergy MetabolismNutritional RequirementsModels, BiologicalBody Temperature RegulationBlastocystCold TemperatureSkin AbsorptionAgingEmbryonic DevelopmentSunlightTime FactorsMice, HairlessNitrogenReference ValuesPositron-Emission TomographyMitochondrial ProteinsCysteamineSex CharacteristicsWound HealingMelaninsGene Expression Regulation, DevelopmentalEmbryo LossRNA, MessengerEmbryonic and Fetal DevelopmentSkin TestsLearningCell LineAdministration, TopicalFluorodeoxyglucose F18Fertilization in VitroDietary ProteinsPregnancyPyrimidine DimersCleavage Stage, OvumDNA DamageCell DifferentiationBlastomeresOxidative StressBase SequenceMuscle, SkeletalIon ChannelsErythemaPsychomotor PerformancePhotosensitizing AgentsKeratinsMelanomaImmunohistochemistryAge FactorsGene ExpressionCell Line, TransformedMolecular Sequence DataBrainCell SurvivalDietGene Expression RegulationMutationCell DivisionMice, Inbred C57BLBody WeightApoptosisSignal TransductionEmbryo DispositionObesity