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Changes in the quantity and composition of mammary gland secretion in the dry period between lactations: I. The beginning of the dry period

Published online by Cambridge University Press:  01 June 2009

J. V. Wheelock ,
A. Smith ,
F. H. Dodd  and
R. L. J. Lyster
J. V. Wheelock
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
A. Smith
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
F. H. Dodd
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
R. L. J. Lyster
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
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Summary

The changes in the yield and composition of the mammary gland secretion in the first 16 days of the dry period have been investigated in 6 cows. The quantity of secretion, lactose, potassium, casein, α-lactalbumin, β-lactoglobulin and fat present in the gland decreased rapidly. A decrease was also observed for sodium, chloride, residual albumin and proteose-peptone + globulin but was much less marked. Changes in composition were qualitatively similar to those normally occurring at the end of lactation but they were much more pronounced. Within 8 days after drying-off the concentrations in the secretion of sodium, chloride and potassium were similar to those of blood. There were differences between, animals in the rate at which the changes developed. As the secretory activity of the gland ceased, the constituents of the mammary gland secretion appeared to be resorbed.

Type
Original Articles
Information
Journal of Dairy Research , Volume 34 , Issue 1 , February 1967 , pp. 1 - 12
Copyright
Copyright © Proprietors of Journal of Dairy Research 1967

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References

REFERENCES

Aschaeffenburg, R. & Drewry, J. (1959). 15th Int. Dairy Congr. 3, 1631.Google Scholar
Barry, J. M. & Rowland, S. J. (1953). Biochem. J. 54, 575.CrossRefGoogle Scholar
Gaines, W. L. & Davidson, F. A. (1926). Bull. III. agric. Exp. Stn no. 272.Google Scholar
Johansson, I. & Hansson, A. (1940). K. Landtbr Akad. Handl. Tidskr. 79, 127.Google Scholar
Klein, J. W. & Woodward, T. E. (1943). J. Dairy Sci. 26, 705.CrossRefGoogle Scholar
Larson, B. L. (1958). J. Dairy Sci. 41, 1033.CrossRefGoogle Scholar
Larson, B. L. & Hageman, E. C. (1963). J. Dairy Sci. 46, 14.CrossRefGoogle Scholar
Larson, B. L. & Twarog, J. M. (1961). J. Dairy Sci. 44, 1843.Google Scholar
Lascelles, A. K. (1961). Nature, Lond. 191, 1404.CrossRefGoogle Scholar
Lascelles, A. K. (1962). Q. Jl exp. Physiol. 47, 48.CrossRefGoogle Scholar
Mcfarlane, D., Rennie, J. C. & Blackburn, P. S. (1949). Unpublished. (Cited by Turner, C. W. (1952), in The Mammary Gland. 1. Anatomy of the Udder of Cattle and Domestic Animals. Columbia, Mo.: Lucas.)Google Scholar
Mossiman, W. (1949). Acta anat. 8, 347.CrossRefGoogle Scholar
Neave, F. K., Dodd, F. H. & Henriques, E. (1950). J. Dairy Res. 17, 37.CrossRefGoogle Scholar
Petersen, W. E. & Rigor, T. V. (1932-1933). Proc. Soc. exp. Biol. Med. 30, 257.CrossRefGoogle Scholar
Rowland, S. J., Neave, F. K., Dodd, F. H. & Oliver, J. (1959). 15th Int. Dairy Congr. 1, 121.Google Scholar
Rowland, S. J., Roy, J. H. B., Sears, H. J. & Thompson, S. Y. (1953). J. Dairy Res. 20, 16.CrossRefGoogle Scholar
Sanders, H. G. (1928). J. agric. Sci., Camb. 18, 209.CrossRefGoogle Scholar
Smith, A., Wheelock, J. V. & Dodd, F. H. (1966). J. Dairy Sci. 49, 895.CrossRefGoogle Scholar
Swanson, E. W. (1965). J. Dairy Sci. 48, 1205.CrossRefGoogle Scholar
Turner, C. W. & Reineke, E. P. (1936). Res. Bull. Mo. agric. Exp. Stn no. 235.Google Scholar
Turner, H. G. (1955). Aust. J. agric. Res. 6, 154.Google Scholar
Wheelock, J. V. & Rook, J. A. F. (1966). J. Dairy Res. 33, 37.CrossRefGoogle Scholar
Wheelock, J. V., Rook, J. A. F. & Dodd, F. H. (1965a). J. Dairy Res. 32, 249.CrossRefGoogle Scholar
Wheelock, J. V., Rook, J. A. F. & Dodd, F. H. (1965b). J. Dairy Res. 32, 79.CrossRefGoogle Scholar
Wheelock, J. V., Rook, J. A. F. & Dodd, F. H. (1965c). J. Dairy Res. 32, 237.CrossRefGoogle Scholar
Wheelock, J. V., Rook, J. A. F., Neave, F. K. & Dodd, F. H. (1966). J. Dairy Res. 33, 199.CrossRefGoogle Scholar
Woodman, H. E. & Hammond, J. (1923). J. agric. Sci., Camb. 13, 180.CrossRefGoogle Scholar