[Lymph, plasma and urinary hydrolases during animal feeding with different types of food]

In acute and chronic tests with dogs the effect of feeding the animals on meat, bread, or butter upon the pancreatic enzymes incretion was studied. The activity of the amylase, lipase, trypsin and of its inhibitor was determined during an acute test in the thoracic duct lymph, in the blood plasma of the portal and jugular veins, the amylase and lipase being also determined in the urine. The incretion of the pancreatic enzymes is adapted to the type of the food stimulant, viz. after feeding on bread it is the amylase incretion that increases to the most, on meat--it is that of trypsin and its inhibitor and on butter - of lipase. Most informative as to the level of the hydrolases increation adaptability is separation of corresponding enzymes forming part of the lymph, less so - their content in the plasma of the portal and still less - in the peripheral venous blood and the least - the content and segregation of the hydrolases from the urine.