title: [Urea formation in kidneys of the domestic fowl in early postincubation ontogenesis].
abstract: The nitrogen secretion is not limited in any animal species to one final nitrogenous metabolite only. In the organism of uricotelic birds, besides other products, urea is produced. It was revealed that it developed also in the kidney of the domestic fowl. In the experiments with 130 cockerels of the White Leghorn breed--a commercial Primant hybrid at the age from 0 to 62 days--we determined the urea concentration in the supernatant of kidney homogenate and in the heparinized blood plasma by diacetylmonoxim according to Homolka (1971). In the kidney we observed a moderate insignificant increase of urea concentration from 0 to 62 days of post-incubation life (zero-day: 34.77 +/- 9.20 mg per 100 g; the 62nd day: 36.46 +/- 14.66 mg per 100 g). In the heparinized blood plasma the urea concentration was increased significantly from the initial values of 16.66 +/- 3.17 mg per 100 ml (zero-day) to 54.03 +/- 3.19 mg per 100 ml (the 62nd day).
mesh_terms: D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn; D002645:Chickens / Q000378:metabolism*; D007668:Kidney / Q000378:metabolism*; D008297:Male; D013997:Time Factors; D014508:Urea / Q000096:biosynthesis*
chemical_list: D014508:Urea
vernacular_title: Tvorba mocoviny v ledvinách kura domácího v casné postinkubacní ontogenezi.