Hydrochloric AcidAcetic AcidPneumonia, AspirationNitric AcidGastric JuiceDecalcification TechniqueTrifluoroacetic AcidCountercurrent DistributionHydrogen-Ion ConcentrationEsophagusAcidsStomachFluoroacetatesSulfuric AcidsGastric AcidAchlorhydriaParietal Cells, GastricAcetatesIndoleacetic AcidsSodium HydroxideGastric MucosaGastric FistulaPepsin AAlkalosisPentagastrinAppendixAcidosisDuodenumStomach UlcerAcetobacterSodium ChlorideSpectrophotometry, AtomicSecretinAcetobacteraceaeBicarbonatesXanthonesHydrolysis