Hostname: page-component-84b7d79bbc-c654p Total loading time: 0 Render date: 2024-07-28T02:33:48.375Z Has data issue: false hasContentIssue false
  • English
  • Français

Measurement of the quantity of lactose passing into mammary venous plasma and lymph in goats and in a cow

Published online by Cambridge University Press:  01 June 2009

N. J. Kuhn  and
J. L. Linzell
N. J. Kuhn
Affiliation:
Agricultural Research Council Institute of Animal Physiology, Babraham, Cambridge
J. L. Linzell
Affiliation:
Agricultural Research Council Institute of Animal Physiology, Babraham, Cambridge
Get access Rights & Permissions [Opens in a new window]

Summary

Lactose in the plasma of 12 lactating goats and one cow with healthy udders has been measured by a sensitive and specific enzymic assay. Mean values (±S.E.) for arterial and venous concentrations were 52±11 µM and 70±11 µM respectively. Simultaneous measurement of mammary blood flow, milk yield and milk lactose concentration showed that 2·70±0·25% (mean±S.E.) of the total lactose production passed into the plasma. This rose to 42·7% in a goat when milking was suspended for 46 h. No lactose was found in the plasma of male and non-lactating female goats, but it was detected 4 days before parturition in a nulliparous goat.

Type
Original Articles
Information
Journal of Dairy Research , Volume 37 , Issue 2 , June 1970 , pp. 203 - 208
Copyright
Copyright © Proprietors of Journal of Dairy Research 1970

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

Blackburn, P. S. (1965). Br. vet. J. 121, 154.CrossRefGoogle Scholar
Heyndrickx, G. V. & Peeters, G. J. (1960). Biochem. J. 75, 1.CrossRefGoogle Scholar
Hyvärinen, A. & Nikkilä, E. O. (1962). Clinica chim. Acta 7, 140.CrossRefGoogle Scholar
Linzell, J. L. (1960 a). J. Physiol., Lond. 153, 510.CrossRefGoogle Scholar
Linzell, J. L. (1960 b). J. Physiol., Lond. 153, 481.CrossRefGoogle Scholar
Linzell, J. L. (1966 a). Circulation Res. 18, 745.CrossRefGoogle Scholar
Linzell, J. L. (1966 b). J. Physiol., Lond. 186, 79P.Google Scholar
Linzell, J. L. (1966 c). J. Dairy Sci. 49, 307.CrossRefGoogle Scholar
Marshall, F. H. A. & Kirkness, J. M. (1907). Biochem. J. 2, 1.CrossRefGoogle Scholar
Moore, B. & Parker, W. H. (1900). Am. J. Physiol. 4, 239.CrossRefGoogle Scholar
Reithel, F. J. (1963). In Methods of Enzymatic Analysis, p. 103 (Ed. Bergmeyer, H. U.). New York: Academic Press Inc.Google Scholar
Shock, N. W. (1958). Ciba Fdn Colloq. Ageing 4, 229.Google Scholar
Slein, M. H. (1963). In Methods of Enzymatic Analysis, p. 117 (Ed. Bergmeyer, H. U.). New York: Academic Press Inc.Google Scholar
Wheelock, J. V. & Rook, J. A. F. (1966). J. Dairy Res. 33, 37.CrossRefGoogle Scholar
Whistler, R. L. & Durso, D. F. (1950). J. Am. chem. Soc. 62, 677.CrossRefGoogle Scholar
Willits, R. E. & Babel, F. J. (1965). J. Dairy Sci. 48, 1287.CrossRefGoogle Scholar