Hostname: page-component-6bf8c574d5-8gtf8 Total loading time: 0 Render date: 2025-02-18T02:47:36.506Z Has data issue: false hasContentIssue false
  • English
  • Français

The development of the digestive system of the young animal IV. Proteolytic enzyme development in the young lamb

Published online by Cambridge University Press:  27 March 2009

D. M. Walker
D. M. Walker
Affiliation:
Royal Veterinary College, Camden Town, London, N.W. 1
Get access Rights & Permissions [Opens in a new window]

Extract

1. The digestive organs and contents of twelve lambs, varying in age from 1 to 5 weeks, have been examined for their proteolytic enzyme activity at pH 1·8, 3·5 and 8·5.

2. Enzyme activity at 1·8 was present only in the abomasum and its contents.

3. All tissues and contents examined were active on haemoglobin at pH 3·5.

4. Small intestine contents and pancreas alone were active on azocasein at pH 8·5.

5. The majority of tissues and contents increased their proteolytic activity with increase in age. The abomasum wall, however, increased in activity up to 21 days and thereafter decreased, both at pH 1·8 and 3·5.

6. Milk-clotting action was measured on abomasum wall and contents. There was an absence of milk clots in the abomasum after 21 days, by which time rumen function had commenced.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 53 , Issue 3 , December 1959 , pp. 381 - 386
Copyright
Copyright © Cambridge University Press 1959

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Anson, M. L. (1938). J. Gen. Physiol. 22, 79.CrossRefGoogle Scholar
Blaxter, K. L. & Wood, W. A. (1953). Vet. Rec. 65, 889.Google Scholar
Braude, R., Dollar, A. M., Mitchell, K. G., Porter, J. W. G. & Walker, D. M. (1958). Proc. Nutr. Soc. 17, xlix.Google Scholar
Chabney, J. & Tomarelli, R. H. (1947). J. Biol. Chem. 171, 501.Google Scholar
Dollar, A. M. (1958). Ph.D. Thesis. University of Reading.Google Scholar
Draper, H. H., Sims, J. T. & Johnson, B. C. (1952). J. Anim. Sci. 11, 332.CrossRefGoogle Scholar
Edgerly, G. M., Jensen, C. & Williams, J. B. (1957). Bull. N. Dak. Agric. Exp. Sta. 19, 133.Google Scholar
Kastelic, J., Bentley, O. G. & Phillips, P. H. (1950). J. Dairy Sci. 33, 725.CrossRefGoogle Scholar
Lassiter, C. A., Ward, G. M., Huffman, C. F., Duncan, C. W. & Webster, H. D. (1953). J. Dairy Sci. 36, 997.CrossRefGoogle Scholar
Lewis, C. J., Hartman, P. A., Liu, C. H., Baker, R. O. & Catron, D. V. (1957). Agric. Fd Chem. 5, 687.CrossRefGoogle Scholar
Noller, C. H., Ward, G. M., McGilliard, A. D., Huffman, C. F. & Duncan, C. W. (1956). J. Dairy Sci. 39, 1288.CrossRefGoogle Scholar
Walker, D. M. (1959 a). J. Agric. Sci. 52, 357.CrossRefGoogle Scholar
Walker, D. M. (1959 b). J. Agric. Sci. 53, 374.CrossRefGoogle Scholar