StomachGastric Acidity DeterminationGastric AcidStomach NeoplasmsHydrogen-Ion ConcentrationAcidsStomach DiseasesGastric MucosaStomach UlcerGastric JuiceAnti-Ulcer AgentsGastrinsRanitidine2-PyridinylmethylsulfinylbenzimidazolesOmeprazoleRabeprazoleAchlorhydriaFamotidineHistamine H2 AntagonistsPasteurizationCimetidinePyloric AntrumDuodenal UlcerBenzimidazolesAcid RainAntacidsEsophagusHelicobacter pyloriLansoprazoleHydrochloric AcidDuodenumProton Pump InhibitorsSulfoxidesGastroesophageal RefluxNizatidineMilk BanksPentagastrinStomach RuptureHelicobacter InfectionsColaGastric FundusHeartburnGastritisParietal Cells, GastricStomach VolvulusCross-Over StudiesGastrectomySpecific GravityDigestive SystemPostprandial PeriodTime FactorsGastrointestinal ContentsDental Enamel SolubilityBacteria, AerobicNitric AcidPhysicochemical ProcessesVagotomyGastrointestinal MotilityGastroscopyBicarbonatesCalcium CarbonateAcid-Base EquilibriumSurgically-Created StructuresPhenolphthaleinSmogTooth ErosionSodium HydroxideEriobotryaBuffersChymosinEnprostilStomach, RuminantPylorusProton PumpsEsophagitis, PepticGastritis, AtrophicSodium BicarbonatePotentiometryFruitGastric FistulaUreaseEsomeprazoleAnemia, PerniciousRhizobium tropiciLactic AcidTitrimetryFoodFood StorageLactobacillusPepsin AStomach, AvianGhrelinGastric StumpMalusEsophagitisHistamineAlkaliesSulfuric AcidsGastrointestinal TractGastrointestinal Neoplasms