Title: Gastric Hydrogen Ion Concentration and Acidity in the Domestic Fowl
Abstract:INFORMATION on the hydrogen ion concentration in the gizzard of the domestic fowl has been recorded by McLaughlin (1931), Mussehl et al. (1933), Kerr and Common (1935), Heller and Penquite (1936), and...INFORMATION on the hydrogen ion concentration in the gizzard of the domestic fowl has been recorded by McLaughlin (1931), Mussehl et al. (1933), Kerr and Common (1935), Heller and Penquite (1936), and Farner (1942). In each case, however, the determinations were made on the fluid removed from the gizzards of freshly killed birds. Collip (1922) removed gizzard fluid from live birds by lumbar puncture and determined the titratable acidity to Toepfer’s reagent before and after injections of certain extracts. Cheney (1938) removed gizzard fluid by means of a tube inserted through the esophagus, crop, and proventriculus of anesthetized birds. Free and total acidity were determined by titration to end points with Toepfer’s reagent and phenolphthalein, respectively. It was noted that the gizzard contents removed from live birds contained “free acid” whereas those from autopsied birds did not. Preliminary investigations by the author showed that marked differences in hydrogen ion concentration . . .Read More