Gastric Acidity DeterminationGastric AcidHydrogen-Ion ConcentrationAcidsAnti-Ulcer AgentsRanitidine2-PyridinylmethylsulfinylbenzimidazolesRabeprazoleGastric JuiceOmeprazoleFamotidineGastrinsPasteurizationAchlorhydriaHistamine H2 AntagonistsDuodenal UlcerAcid RainBenzimidazolesCimetidineSulfoxidesLansoprazoleNizatidineAntacidsStomachMilk BanksProton Pump InhibitorsGastroesophageal RefluxColaHydrochloric AcidHeartburnGastric MucosaSpecific GravityCross-Over StudiesGastrointestinal ContentsDental Enamel SolubilityBacteria, AerobicStomach UlcerNitric AcidPhysicochemical ProcessesAcid-Base EquilibriumPhenolphthaleinSmogTooth ErosionSodium HydroxideEriobotryaCalcium CarbonateEsophagusEnprostilPostprandial PeriodProton PumpsBicarbonatesBuffersPotentiometrySurgically-Created StructuresEsomeprazolePentagastrinChymosinRhizobium tropiciTitrimetryFood StorageLactic AcidMalusSodium BicarbonateEsophagitis, PepticFruitSulfuric AcidsCitrus sinensisAmmonium ChlorideHelicobacter pyloriAcidosisTime FactorsPhlebitisProtonsCircadian RhythmDuodenumSimethiconeExocrine Pancreatic InsufficiencySoilFertilizersFood AnalysisHoneyWaterGastric EmptyingEsophagitisIon-Selective ElectrodesCarboxylic AcidsFood PreservationAlkaliesBeveragesLactobacillusAir PollutantsCarbon DioxideCitric AcidAerosolsAnemia, PerniciousCarbonated BeveragesKineticsPirenzepineHelicobacter InfectionsGastritis, Atrophic