[The effect of hydrocortisone on carbohydrase activity along the intestinal villus in chicks].

Administration of hydrocortisone increased the sucrase and amylolytic activities in the brush border of the enterocytes along the intestinal villus and decreased the maltase activity in fed chicken. Hydrocortisone does not affect the level of maltase activity in food-deprived chicks.

[The effect of hydrocortisone on pancreatic hydrolase activity in hungry and fed chicks].

Hydrocortisone was shown to prompt the accumulation of pancreatic enzymes taking part in the processing of food protein components in food-deprived chicks. The quality of the enzymes synthetized under hormonal induction does not differ from that in control groups.

[The regulation of saccharase and phosphofructokinase activity in the small intestine of chicks of different ages].

Studies have been made on the onset and regulation of the activity of sucrase and phosphofructokinase from different parts of the small intestine of chicks after hatching up to the 30th day of postnatal life. It was shown that within this period the activity of both enzymes undergoes synchronous changes. Carbohydrate loading increases the activity of sucrase only in 30-day chicks, its effect being similar to that of a stimulator from the duodenum.

[The adaptation of the digestive system to carbohydrates in experimental A hypervitaminosis].

High doses of vitamin A exerted no significant effect of the ability of the rat digestive system to adapt to food. The A hypervitaminosis increased the activity of sucrase and eliminated the ability to regulate the activity of this enzyme by the duodenum in the chicken small intestine.