Hostname: page-component-848d4c4894-hfldf Total loading time: 0 Render date: 2024-05-13T06:23:34.298Z Has data issue: false hasContentIssue false
  • English
  • Français

Blood urea measurement as a technique for assessing protein quality

Published online by Cambridge University Press:  09 March 2007

Bjørn O. Eggum
Bjørn O. Eggum
Affiliation:
Department of Physiology and Chemistry, Agricultural Research Laboratory, Copenhagen, Denmark
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

1. Three factors were investigated which influence blood urea content, namely the protein content in the diet, the time after feeding and the protein quality of the diet.

2. To investigate the relationship between the protein content in the diet and the blood urea content, seventeen experiments with rats given increasing amounts of protein in the diet were carried out. The experimental results show that there is a positive correlation (r = 0.95) between the protein content in the diet and the blood urea content.

3. For investigation of the influence of time after feeding on the urea content in the blood, a pig was used having a catheter in the portal vein for blood sampling at intervals. The results from this experiment showed that the blood urea content increases for the first 3–4 h after feeding and thereafter reaches a plateau.

4. To use blood urea measurement as a technique for assessing protein quality it is necessary to work under standardized conditions, especially in regard to the two factors just discussed.

5. Forty-two feeding-stuffs of widely differing quality were used in nitrogen balance trials with rats. The results showed that there is an inverse relation between the blood urea content and the biological value of the diet which is sufficiently accurate (coefficient of variation = 53%) to provide ausefulmethod for the predictionof protein quality from measurement of urea levels.

Type
Research Article
Information
British Journal of Nutrition , Volume 24 , Issue 4 , December 1970 , pp. 983 - 988
Copyright
Copyright © The Nutrition Society 1970

References

REFERENCES

Anderson, R. S. & Edney, A. T. B. (1969). Vet. Rec. 84, 348.CrossRefGoogle Scholar
Barnes, R. H., Bates, M. J. & Maack, J. E. (1946). J. Nutr. 32, 535.CrossRefGoogle Scholar
Conway, E. J. & O'Malley, E. (1942). Biochem. J. 36, 655.CrossRefGoogle Scholar
Eggum, B. O. & Mercer, N. H. (1964). Ugeskr. Landnz. no. 50.Google Scholar
Fonnesbeck, P. V. & Symons, L. D. (1969). J. Anim. Sci. 28, 216.CrossRefGoogle Scholar
Forbes, R. M., Vaughan, L. & Yohe, M. (1958). J. Nutr. 64, 291.CrossRefGoogle Scholar
Kornegay, E. T., Miller, E. R., Ullrey, D. E. & Hoefer, J. A. (1964). J. Anim. Sci. 23, 688.CrossRefGoogle Scholar
Kumta, U. S. & Harper, A. E. (1961). J. Nutr. 74, 139.CrossRefGoogle Scholar
Miller, D. S. & Payne, P. R. (1961). Br. J. Nutr. 15, 11.CrossRefGoogle Scholar
Münchow, H. & Bergner, H. (1968). Arch. Tierernähr. 18, 222.CrossRefGoogle Scholar
Nehring, K. & Haesler, E. (1954). Arch. Tierernähr. Suppl. no. 5, p. 110.Google Scholar
Pastuszewska, B. (1967). Roczn. Naukroln. Ser. B 89, 4.Google Scholar