title: Stability of plasma metabolites and hormones in lactating dairy cows.
abstract: Plasma concentration stability of glucose, free fatty acids, ketone bodies, growth hormone, insulin were determined in lactating dairy cows. Concentrations of these metabolites and hormones were measured during a 36- to 48-hour period in 3 normal, mature dairy cows in the 2nd month of lactation. Samples were taken at 30-minute intervals; also, intensive sampling (every 10 minutes) was done at varying times in relation to feeding and milking. Of the 5 components measured, glucose concentration was the most stable, easiest to assay, and most reliable for use as a diagnostic aid in assessing metabolic carbohydrate disturbances in dairy cattle.
mesh_terms: D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D002417:Cattle / Q000097:blood* / Q000502:physiology; D005230:Fatty Acids, Nonesterified / Q000032:analysis / Q000097:blood; D005260:Female; D013006:Growth Hormone / Q000097:blood; D007328:Insulin / Q000097:blood; D007657:Ketone Bodies / Q000097:blood; D007774:Lactation; D011247:Pregnancy
chemical_list: D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D007328:Insulin; D007657:Ketone Bodies; D013006:Growth Hormone