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Journal of Dairy Science Vol. 39 No. 9 1312-1322
© 1956 by American Dairy Science Association ®
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Esterolytic Activity of Certain Alimentary and Related Tissues from Cattle in Different Age Groups1

H. A. Ramsey2, G. H. Wise and S. B. Tove

Animal Nutrition Section, Department of Animal Industry, North Carolina State College, Raleigh

ABSTRACT

Extracts of various alimentary and related tissues from cattle of different ages were prepared and assayed for their esterolytic activity. Extracts of tissues from the tongue in the region of the vallate papillae, from the glosso-epiglottic area, from the pharyngeal end of the esophagus, and from the submaxillary salivary gland were higher in activity than extracts of tissues from the tongue in the region of the fungiform papillae, from the sublingual salivary gland, from the parotid salivary gland, from the portion of the esophagus distal to the pharyngeal end, and from the fundic and the pyloric regions of the abomasum.

Extracts of the tissues from the tongue in the region of the vallate papillae, from the glosso-epiglottic area, and from the pharyngeal end of the esophagus of day-old calves were more active than extracts of corresponding tissues from older calves and mature cattle. The activity of extracts of the submaxillary and the sublingual salivary glands increased slightly with increasing age of animal.

FOOTNOTES

1 Approved by the Director of Research for publication as Paper No. 704 in the Journal Series.

2 The data in this paper are from a thesis submitted by the senior author, a Ralston Purina Research Fellow, to the graduate faculty of North Carolina State College in partial fulfillment of the requirements for the degree of Doctor of Philosophy.






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Copyright © 1956 by the American Dairy Science Association ®.