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Journal of Dairy Science Vol. 63 No. 11 1796-1801
© 1980 by American Dairy Science Association ®
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Sunlight and Sodium Hypochlorite Induced Color Changes in Milk

Takahiro Toba and Susumu Adachi

Laboratory of Animal Products Technology, College of Agriculture, Tohoku University, Sendai, Japan

Ikichi Arai

Miyagi Dairy Inspection Association, Sendai, Japan

ABSTRACT

Absrtact: Color changed in milk with exposure to sunlight for 1 to 2 h and to fluorescent light or ultraviolet light for 4 to 5 h. Milk also discolored with sodium hypochlorite of more than 200 ppm available chlorine. Both color changes were caused principally by degradation of tryptophan and tyrosine in milk proteins. The former discoloration was accompanied by a significant loss of riboflavin.




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F. Mestdagh, B. De Meulenaer, J. De Clippeleer, F. Devlieghere, and A. Huyghebaert
Protective Influence of Several Packaging Materials on Light Oxidation of Milk
J Dairy Sci, February 1, 2005; 88(2): 499 - 510.
[Abstract] [Full Text] [PDF]


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Copyright © 1980 by the American Dairy Science Association ®.