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Journal of Dairy Science Vol. 51 No. 3 457-458
© 1968 by American Dairy Science Association ®
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Protein Changes Associated with Extended Storage of Sterile Unheated Skimmilk1

E. M. Mikolajcik

Department of Dairy Technology, The Ohio State University, Columbus

ABSTRACT

Changes in the protein system of sterile unheated skimmilk during extended storage were investigated with polyacrylamide gel electrophoresis. The results reveal that decreases in the concentration of immune globulins, blood serum albumin, ß-casein, and as-casein occurred during a 15-day storage period at 30 C, with the effect being greater and occurring more rapidly for the casein components. No changes in the proteins were observed during 15 days' storage at 4 C. Storage of the skimmilk beyond 15 days at 30 C resulted in coagulation and serum separation.

FOOTNOTES

1 Article 10:67. Department of Dairy Technology, The Ohio State University. This investigation was supported in part by Public Health Services Grant UI-00106 from the National Center for Urban and Industrial Health and an Ohio State University Council on Research grant.






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Copyright © 1968 by the American Dairy Science Association ®.