title: [Blood levels of nitrogenous substances in dairy cows with high and low production].
abstract: In blood serum of dairy cows of the Slovak Pied breed with high and low performance, the levels of total protein, urea, amino nitrogen, non-protein nitrogen and uric acid were studied over the period of four to six weeks after calving. Total protein was determined by the Bio-La-test, amino nitrogen by means of ninhydrin, non-protein nitrogen by Berthelot agent and uric acid by Benedict agent. In comparison with dairy cows with low performance, the dairy cows with high performance had a statistically significantly higher level of total protein, urea, amino nitrogen and non-protein nitrogen. The differences in uric acid content were statistically insignificant.
authors.forename: M
authors.initials: M
authors.lastname: Pjescak
authors.forename: J
authors.initials: J
authors.lastname: Kovácik
authors.forename: E
authors.initials: E
authors.lastname: Kollárová
mesh_terms: D000818:Animals; D001798:Blood Proteins / Q000032:analysis; D002417:Cattle / Q000097:blood*; D003612:Dairying; D005260:Female; D009584:Nitrogen / Q000097:blood*; D014508:Urea / Q000097:blood; D014527:Uric Acid / Q000097:blood
chemical_list: D001798:Blood Proteins; D014527:Uric Acid; D014508:Urea; D009584:Nitrogen
vernacular_title: Uroveń niektorých dusíkatých látok v krvnom sére dojníc s vysokou a nízkou úzitkovostou.