QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Clark, H. E. Articles by Malzer, J. L. Search for Related Content PubMed PubMed Citation Articles by Clark, H. E. Articles by Malzer, J. L.

Nitrogen Balances of Adult Human Subjects Who Consumed Four Levels of Nitrogen from a Combination of Rice, Milk and Wheat^{1, 2,}

Department of Foods and Nutrition, Purdue University, Lafayette, Indiana 47907

Young adult human subjects consumed 8.0, 7.0, 6.0 and 5.0 g of nitrogen per day from rice, milk and wheat flour which provided 50, 25 and 25%, respectively, of the nitrogen in each treatment. Mean daily nitrogen balances decreased from + 0.85 to + 0.12 g. The regression of nitrogen balance on nitrogen intake was significant (P < 0.05) due primarily to the effect on urinary nitrogen (P < 0.01). Both 8.0 and 7.0 g of dietary nitrogen from these sources permitted sufficient nitrogen retention to compensate for integumental losses whereas 6.0 g was the minimal amount required for maintenance of nitrogen equilibrium. Therefore, 44 g of protein per day (equivalent to 0.6 g/kg of body weight) were adequate, 38 g (0.5 g/kg) met minimal requirements and 32 g (0.4 g/kg) were inadequate. The combination of 241 g of rice, 73 g of wheat flour and 27 g of nonfat dry milk that furnished 6.0 g of nitrogen contained 2.01 g of lysine, 1.68 g of sulfur-containing amino acids and 0.39 g of tryptophan.

KEY WORDS: • protein requirements • lysine • methionine • tryptophan • rice • milk • wheat

¹ From Purdue University Agricultural Experiment Station and School of Home Economics, Department of Foods and Nutrition, Lafayette, Indiana 47907. Journal paper 4682.

² Supported in part by U. S. Public Health Service Grant AM 08533.

Manuscript received 8 March 1972.

This article has been cited by other articles:

				M. A Humayun, R. Elango, R. O Ball, and P. B Pencharz Reevaluation of the protein requirement in young men with the indicator amino acid oxidation technique Am. J. Clinical Nutrition, October 1, 2007; 86(4): 995 - 1002. [Abstract] [Full Text] [PDF]