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Milk stability in ethanolic solutions

Published online by Cambridge University Press:  01 June 2009

Alice Pierre
Alice Pierre
Affiliation:
Dairy Research Laboratory, INRA, 65, rue de Saint Brieuc, 35 Rennes, France
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Summary

We have investigated the role of pH in the destabilization of milk and sodium caseinate solutions by ethanol. Ethanol shifted the pH of minimum stability of both caseinate and milk to higher values. A linear relation between this pH and the reciprocal dielectric constant of the mixture was observed. The addition of calcium to these alcoholic mixtures also increased the pH of minimum stability. The results are discussed in terms of the alcohol-induced shifts in the pK values of important constituent amino acids and of the effect of alcohol on soluble Ca levels.

Type
Original Articles
Information
Journal of Dairy Research , Volume 56 , Issue 3: Special Issue: Proceedings of the Hannah Research Institute Casein Conference , May 1989 , pp. 521 - 527
Copyright
Copyright © Proprietors of Journal of Dairy Research 1989

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References

REFERENCES

Akerlof, G. 1932 Dielectric constants of some organic solvent-water mixtures at various temperatures. Journal of the American Chemical Society 54 4125–4139CrossRefGoogle Scholar
Davies, D. T. & White, J. C. D. 1958 The relation between the chemical composition of milk and the stability of the caseinate complex. II. Coagulation by ethanol. Journal of Dairy Research 25 256–266CrossRefGoogle Scholar
Horne, D. S. & Davidson, C. M. 1987 Alcohol stability of bovine skim milk. Anomalous effects with trifluoroethanol. Milchwissenschaft 42 509–512Google Scholar
Horne, D. S. & Parker, T. G. 1980 The pH sensitivity of individual cow milks. Netherlands Milk and Dairy Journal 34 126–130Google Scholar
Horne, D. S. & Parker, T. G. 1981 a Factors affecting the ethanol stability of bovine milk. I. Effect of serum phase components. Journal of Dairy Research 48 273–284CrossRefGoogle Scholar
Horne, D. S. & Parker, T. G. 1981 b Factors affecting the ethanol stability of bovine milk. II. The origin of the pH transition. Journal of Dairy Research 48 285–291CrossRefGoogle Scholar
Horne, D. S. & Parker, T. G. 1981 c Factors affecting the ethanol stability of bovine milk. III. Substitution of ethanol by other organic solvents. International Journal of Biological Macromolecules 3 399–402CrossRefGoogle Scholar
Horne, D. S. & Parker, T. G. 1982 Factors affecting the ethanol stability of bovine milk. V. Effect of chemical modification of milk protein. Journal of Dairy Research 49 449–457CrossRefGoogle Scholar
Pierre, A. 1985 Etude de la stabilité du lait à l'alcool. Solubilité du phosphate et du calcium du lait en présence d'éthanol. Le Lait 65 201–212CrossRefGoogle Scholar