title: In-vivo investigations by continuous measurements of gastric and duodenal pH.
mesh_terms: D000863:Antacids / Q000494:pharmacology*; D004386:Duodenum; D004566:Electrodes; D005745:Gastric Acidity Determination; D005750:Gastric Juice / Q000032:analysis*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007419:Intestinal Secretions / Q000032:analysis*
chemical_list: D000863:Antacids