Hostname: page-component-7479d7b7d-k7p5g Total loading time: 0 Render date: 2024-07-13T21:36:15.805Z Has data issue: false hasContentIssue false
  • English
  • Français

The digestibility of English and Canadian wheats with special reference to the digestibility of wheat protein by man

Published online by Cambridge University Press:  15 May 2009

R. A. McCance  and
E. M. Widdowson
R. A. McCance
Affiliation:
Fromthe Department of Experimental Medicine, Cambridge
E. M. Widdowson
Affiliation:
Fromthe Department of Experimental Medicine, Cambridge
Rights & Permissions [Opens in a new window]

Extract

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. Two men and four women carried out digestibility experiments on English and Canadian wheats at 90 and 80% extractions. The flour was the only source of protein and contributed 77−93% of the total dietary calories.

2. At 90% extraction the digestibility of the diets in terms of calories was unaffected by the source of the flour and amounted to 93·3%. At 80% extraction the digestibility of the diet containing English wheat amounted to 95·6% and of those containing Manitoba wheat to 96·7%. The difference is attributed to mild intestinal upsets on the English flour.

3. The apparent digestibility of the protein depended upon the amount of N in the wheat and fell as the extraction rose. A quantitative analysis of the results indicates that the protein in wheat flour of 90 and 80% extraction is completely digested and absorbed, and that the N found in the faeces is entirely derived from the secretions of the gut.

The Medical Research Council paid for the expenses of this investigation. We are very much indebted to Drs T. Moran, C. R. Jones and other members of the Cereals Research Station, St Albans, without whose help this study would hardly have been possible. We have also very much appreciated the help we have received from the subjects, Miss M. Costain, Miss C. M. Walsham, Miss E. Wilkinson and Mr R. Tayler, and also from Flt.-Sergeant Childs, who kindly made the bomb calorimeter determinations.

Type
Research Article
Information
Journal of Hygiene , Volume 45 , Issue 1 , January 1947 , pp. 59 - 64
Copyright
Copyright © Cambridge University Press 1947

References

REFERENCES

Boas-Fixsen, M. A. & Jackson, H. M. (1932). Biochem. J. 26, 1919.CrossRefGoogle Scholar
Hutchinson, J. C. D. & Morris, S. (1936). Biochem. J. 30, 1682.CrossRefGoogle Scholar
Jacquot, R. & Guillemet, R. (1944). Rec. Trav. Inst. Nat. Hyg. 1, vol. 3, p. 177.Google Scholar
Macrae, T. F., Hutchinson, J. C. D., Irwin, J. O., Bacon, J. S. D. & McDougall, E. I. (1942). J. Hyg., Camb., 42, 423.Google Scholar
Martin, C. J. & Robison, R. (1922). Biochem. J. 16, 407.CrossRefGoogle Scholar
McCance, R. A. & Shipp, H. (1933). Spec. Rep. Ser. Med. Res. Coun., Lond., no. 187.Google Scholar
McCance, R. A. & Widdowson, E. M. (1942). J. Physiol. 101, 44.CrossRefGoogle Scholar
McCance, R. A. & Widdowson, E. M. (1945). Spec. Rep. Ser. Med. Res. Coun., Lond., no. 213 (second edition).Google Scholar
McCance, R. A., Widdowson, E. M., Moran, T., Pringle, W. J. S. & Macrae, T. F. (1945). Biochem. J. 39, 213.CrossRefGoogle Scholar
Mitchell, H. H. (1924). J. Biol. Chem. 58, 873.CrossRefGoogle Scholar
Newman, L. F., Robinson, G. W., Halnan, E. T. & Neville, H. A. D. (1912). J. Hyg., Camb., 12, 119.CrossRefGoogle Scholar
Reifenstein, E. C. (1944). Report on Conference on metabolic aspects of convalescence including bone and wound healing (8th meeting, 13 10).Google Scholar
Rubner, M. (1916). Arch. Anat. Physiol. (Physiol. Abt.), Jahrg. 1916, p. 61.Google Scholar
Rubner, M. (1918). Arch. Anat. Physiol. (Physiol. Abt.), Jahrg. 1918, p. 53.Google Scholar
Schneider, B. H. (1934). Biochem. J. 28, 360.CrossRefGoogle Scholar
Snyder, H. (1901). Bull. U.S. Off. Exp. Stas. no. 101. Washington: Gov. Printing Office.Google Scholar
Snyder, H. (1905). Bull. U.S. Off. Exp. Stas. no. 156. Washington: Gov. Printing Office.Google Scholar