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Frozen Homogenized Milk. IV. Keeping Quality of Frozen Homogenized Milk after Thawing

Veterinary Division, Army Medical Department Research and Graduate School, Army Medical Center, Washington, D. C.

ABSTRACT

Previous studies (2, 5, 6, 7, 9) have shown that freezing and storage temperatures affect the physical character of homogenized milk. Later studies (3, 4, 8) showed that when homogenized milk was frozen, the solid components tended to concentrate in the lower portion of the sample. However, changes in the temperature at which frozen homogenized milk was stored did not affect materially the chemical composition of the different sections of quart samples. The concentration of the milk solids in the lower portion of the sample took place during the freezing process and apparently there was no further movement of these solids after the milk was frozen.

The literature does not contain information regarding the keeping quality of homogenized milk after it has been frozen and then thawed. The present study therefore was undertaken to determine the effect that storage of frozen homogenized milk has on its keeping quality after thawing.

¹ Formerly Lieutenant Colonel, SnC, AUS. Present address: Dairy Branch, Production and Marketing Administration, U. S. Department of Agriculture.