Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-26T18:36:55.410Z Has data issue: false hasContentIssue false

Lactose in the blood and urine of cows

Published online by Cambridge University Press:  01 June 2009

J. V. Wheelock
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
J. A. F. Rook
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading

Summary

Lactose could not be detected in the urine of non-lactating cows but was invariably found, though usually in low concentration, in the urine of lactating cows; the highest values were observed with cows of high lactation number. Towards the end of an extended milking interval of 39 h, the lactose concentration in the blood and the excretion of lactose in urine increased markedly, but on milking there was a rapid return to original values. Lactosuria was observed in pregnant cows from about 20 days before parturition, and at parturition there was a temporary, marked increase in the excretion of lactose in urine.

Type
Original Articles
Copyright
Copyright © Proprietors of Journal of Dairy Research 1966

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

Balch, C. C., Bartlett, S. & Johnson, V. W. (1951). J. agric. Sci., Camb., 41, 98.Google Scholar
Brock, H. J. & Hubbard, R. S. (1935). Am. J. dig. Dis. 2, 27.CrossRefGoogle Scholar
Hayashi, M. (1960). Bull. natn. Inst. Anim. Hlth, Tokyo, 38, 143. (Dairy Sci. Abstr. (1961). 23, 1967.)Google Scholar
Hinton, C. L. & Macara, T. (1927). Analyst, Lond., 52, 668.Google Scholar
Huggett, A. St. G. & Nixon, D. A. (1957). Biochem. J. 66, 12P.Google Scholar
Rook, J. A. F. & Campling, R. C. (1965). J. Dairy Res. 32, 45.CrossRefGoogle Scholar
Sjollema, B. (1927 a). Biochem. Z. 182, 453.Google Scholar
Sjollema, B. (1927 b). Biochem. Z. 185, 355.Google Scholar
Stahl, E. & Kaltenbach, U. (1961). J. Chromat. 5, 351.CrossRefGoogle Scholar
Suzuki, J. & Umezu, M. (1957). Med. & Biol., Japan, 42, 47. (Dairy Sci. Abstr. (1961). 23, 1969.)Google Scholar
Suzuki, J. & Umezu, M. (1958). Med. & Biol., Japan, 47, 43. (Dairy Sci. Abstr. (1961). 23, 1969.)Google Scholar
Suzuki, J. & Umezu, M. (1960). Med. & Biol., Japan, 56, 115. (Dairy Sci. Abstr. (1961). 23, 1969.)Google Scholar
Watkins, O. (1928). J. biol. Chem. 80, 33.CrossRefGoogle Scholar
Wheelock, J. V., Rook, J. A. F. & Dodd, F. H. (1965). J. Dairy Res. 32, 237.CrossRefGoogle Scholar