caa a22 4500 388060719 CHVBK 20180307125120.0 cr unu---uuuuu 161130e199804 xx s 000 0 eng 10.1017/S135772980000967X doi S135772980000967X pii (NATIONALLICENCE)cambridge-10.1017/S135772980000967X The activity of some digestive enzymes in domestic rabbits before and after weaning [Elektronische Daten] The activity ofamylase, maitase, lipase, pepsin, trypsin and chymotrypsin in suckling (15 days of age) and in 1-day weaned (43 days of age) domestic rabbits was assayed and compared with older (90 and 180 days) rabbits. It was found that amylase was active in the pancreas at 15 days (11 580 amylase units (AU) per mg protein) and increased during growth, reaching a maximum level (58 960 AU per mg protein) at 90 days of age. Specific activity (SA) of maitase from the small intestine mucosa varied depending on the intestinal segment and the age of the rabbits: activity in the duodenal mucosa decreased, while in the jejunal and Heal mucosa activity increased, during growth. Lipase SA reached a maximum level in suckling rabbits at the age of 15 days (in gastric mucosa 242 and in pancreas 608 mequiv. liberated oleic acid per mg protein per h, 37°C) and decreased sharply at weaning: in gastric mucosa down to 86 and in pancreas down to 89 mequiv. oleic acid per mg protein per h, 37°C. SA of pepsin remained relatively constant for all the studied categories of rabbits: 38 to 39 nmol tyrosine per mg protein per min, 25°C. Trypsin and chymotrypsin SA reached a peak at about weaning: 1·83 nmol benzoyl-arginyl-ethyl-ester per mg protein per min, 25°C and 40·1 nmol benzoyl-phenyl-naphtyl-ester per mg protein per min, 35·5°C respectively. Copyright © British Society of Animal Science 1998 digestive system nationallicence enzymes nationallicence rabbits nationallicence weaning nationallicence Dojană N. Department of Biology of Laboratory Animals, Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine, Bucharest, Romania Costache M. Department of Enzymology, Faculty of Biology, University of Bucharest, Romania Dinischiotu A. Department of Enzymology, Faculty of Biology, University of Bucharest, Romania Animal Science Cambridge University Press 66/2(1998-04), 501-507 1357-7298 66:2<501 1998 66 ASC https://doi.org/10.1017/S135772980000967X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S135772980000967X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dojană N. Department of Biology of Laboratory Animals, Faculty of Veterinary Medicine, University of Agronomic Sciences and Veterinary Medicine, Bucharest, Romania NATIONALLICENCE 700 1- Costache M. Department of Enzymology, Faculty of Biology, University of Bucharest, Romania NATIONALLICENCE 700 1- Dinischiotu A. Department of Enzymology, Faculty of Biology, University of Bucharest, Romania NATIONALLICENCE 773 0- Animal Science Cambridge University Press 66/2(1998-04), 501-507 1357-7298 66:2<501 1998 66 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge