Quantitative feed restriction or meal-feeding of broiler chicks alter functional development of enzymes for protein digestion.

1. Two experiments were performed on broiler chicks to determine the effect of either quantitative feed restriction (QFR) from 5 to 11 d of age or meal-feeding (MF) from d 5 to 17 on development of activity of enzymes associated with protein digestion. 2.

[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.

[Hydrolysis and absorption of lysozyme in the small intestine].

Preparations of chicken small intestine were used in the experiment in vitro simulating processes of membranous digestion (inverted intestinal segments) and absorption (inverted intestinal myasis). It was established that lysozyme was hydrolyzed on the internal mucosa surface regardless of its concentration in the gastro-intestinal tract, and only insignificant quantity of lysozyme (0.027%) penetrates the intestinal wall.

Effect of early postnatal long-term fasting on the development of peptide hydrolysis in chicks.

1. Early development of peptide hydrolysis in the digestive tract was investigated in experiments with fasted and fed ad lib. chicks during the first decade of postnatal period.

Early postnatal development of peptide hydrolysis in chicks and guinea pigs.

1. To characterize the development of peptide hydrolysis the activities of pancreatic carboxypeptidase A (CPA) and intestinal glycylleucine dipeptidase (GLDP) were registered in 1-45 days old chicks, as well as GLDP activities in newborn and adult guinea pigs. 2.