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Comparison of milks processed by the direct and indirect methods of ultra-high-temperature sterilization: V. Denaturation of the whey proteins

Published online by Cambridge University Press:  01 June 2009

R. L. J. Lyster ,
T. C. Wyeth ,
A. G. Perkin  and
H. Burton
R. L. J. Lyster
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
T. C. Wyeth
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
A. G. Perkin
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
H. Burton
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
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Summary

The distribution of protein nitrogen was determined in milk treated by an experimental ultra-high-temperature (UHT) plant, operating alternatively as an indirect or as a direct heating plant.

The extent of denaturation of β-lactoglobulin can be used to assess the relative severity of UHT heat treatments; this criterion was used to compare the indirect and direct arrangements of the plant with each other and with other published results.

The time-temperature profiles of the plant were used to calculate the expected extent of denaturation of β-lactoglobulin during treatment of the milk. The results of the calculations are in fair agreement with the analytical results.

Type
Original Articles
Information
Journal of Dairy Research , Volume 38 , Issue 3 , October 1971 , pp. 403 - 408
Copyright
Copyright © Proprietors of Journal of Dairy Research 1971

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References

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