[Levels of metabolites in the blood of cows during a 24-hour period].
Blood samples were taken from the vena subcutanea abdominis sinistra of four Black-Pied Lowland cows in one-hour intervals within a 24-hour period. No significant circadian changes were recorded in the studied blood components (protein, glucose, ash and dry matter contents). The amount of protein remained unchanged during the 24-hour period. Some changes were observed in the level of glucose, with a decrease from 12.00 to 14.00 o'clock, followed by an increase continuing until late at night (1.00 a.m. to 3.00 a.m.); another decline came in the other half of the night and during the forenoon. More pronounced changes were recorded in the content of dry matter in the blood of the cows, with lower values from 3.00 to 12.00 o'clock. Ash content grew from 12.00 to 20.00 o'clock and then it declined.
D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D001798:Blood Proteins / Q000032:analysis; D002417:Cattle / Q000097:blood*; D002940:Circadian Rhythm; D005260:Female
D001786:Blood Glucose; D001798:Blood Proteins
Hladina niektorých metabolitov v krvi kráv pocas 24 hodín.