PMID: 6981425Sep 1, 1982Paper

Glycosyl ureides in ruminant nutrition. 3. In vivo studies on the metabolism of glycosyl ureides and corresponding mixtures of their free component molecules

The British Journal of Nutrition
R J MerryA B McAllan

Abstract

1. Steers and sheep were given basal diets of barley and straw (1:1, w/w), usually containing urea, which for certain experimental periods were supplemented with pure glucosyl urea (GU), pure lactosyl urea (LU) or a product prepared from whey concentrate (EW) which contained 65-80% of the lactose in the form of LU. 2. On the morning of an experiment ureide (or EW) was omitted from the feed and a dose of either ureide (or EW) or equivalent amounts of free lactose and urea (L + U) was added to the rumen within 30 min of feeding, together in some experiments with polyethylene glycol (PEG) as a fluid-phase marker. Samples of rumen contents, and in some experiments abomasal contents, were taken at intervals for up to 8 h. 3. For both steers and sheep given GU and LU for the first time (unadapted animals) there was little or no accumulation of ammonia in the rumen or cleavage of the sugar-urea bond. Galactose was, however, slowly liberated from LU. 4. For steers and sheep which had been given GU, LU or EW for approximately 7-10 d or more (adapted animals) some accumulation of ammonia occurred after adding GU or LU to the rumen, but for LU it occurred less rapidly and to a lower peak concentration than when L + U was added. In adapted...Continue Reading

References

Jan 1, 1979·Quarterly Journal of Experimental Physiology and Cognate Medical Sciences·W Barej, J Harmeyer
Nov 1, 1977·The British Journal of Nutrition·A Z MehrezI McDonald
Aug 1, 1975·Journal of Dairy Science·L D Satter, R E Roffler
Feb 1, 1970·The Journal of Nutrition·W ChalupaR Lavker

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Citations

Sep 1, 1982·The British Journal of Nutrition·O A Ikwuegbu, J D Sutton
Nov 1, 1984·Archiv für Tierernährung·J Voigt, B Piatkowski
Aug 4, 2011·Equine Veterinary Journal. Supplement·D G M SuttonS Love
Feb 1, 1986·Archiv für Tierernährung·R H Smith
Aug 29, 1997·Biochimica Et Biophysica Acta·F M RuemmeleM J Lentze

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