Abstract
Miller and Payne1 have raised anew the problem of how to explain net protein utilizations (NPU) greater than 100 per cent. They offer a conventional answer, that the metabolic or endogenous loss of nitrogen can be reduced in certain cases and that this results in calculated efficiencies greater than 100 per cent. The examples cited of such high utilizations are of two types where I, Bal, and M are nitrogen intake, nitrogen balance, and endogenous urinary and faecal nitrogen excretion, respectively, and a, b and c are constants.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Miller, D. S., and Payne, P. R., Nature, 204, 480 (1964).
Allison, J. B., Seeley, R. D., Brown, J. H., and Anderson, J. A., J. Nutr., 31, 237 (1946).
Anderson, J. T., and Nasset, E. S., J. Nutr., 40, 625 (1950).
Forbes, R. M., Vaughan, L., and Yohe, M., J. Nutr., 64, 291 (1958).
Bosshardt, D. K., Ydse, L. C., Ayres, M. M., and Barnes, R. H., J. Nutr., 31, 23 (1946).
Benditt, E. P., Woolridge, R. L., Steffee, C. H., and Frazier, L. E., J. Nutr., 40, 335 (1950).
Krehl, W. A., Sarma, P. S., Teply, L. J., and Elvehjem, C. A., J. Nutr. 31, 85 (1946).
Mitchell, H. H., J. Biol. Chem., 58, 873 (1924).
Njaa, L. R., Brit. J. Nutr., 16, 185 (1962).
Miller, D. S., and Payne, P. R., Brit. J. Nutr., 15, 11 (1961).
Ashworth, U. S., Mo. Agric. Expt. Sta. Res. Bull., No. 228 (1935).
Njaa, L. R., Fiskeridir. Skr., 4, No. 5 (1963).
Bender, A. E., Clin. Chim. Acta, 5, 1 (1960).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
NJAA, L. Nitrogen Balance Experiments: some Theoretical Considerations. Nature 211, 1413–1414 (1966). https://doi.org/10.1038/2111413a0
Issue Date:
DOI: https://doi.org/10.1038/2111413a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.