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Commercially processed, 80% lean, chub packaged ground beef (both conventionally boned and hot boned) was frozen to 0 F (-180C) at three rates: 72, 96, and 120 hours before storage at 0 F (-180C). The meat was examined after 0, 1 .5, 3, 6, 9, and 12 months storage for the following attributes: pyschrophile and aerobic plate counts, free fatty acid (FFA) and thiobarbituric acid (TBA) values, niacin content, raw and cooked color, moisture, fat and protein contents, and cook shrink and texture of cooked patties.

Freezing rates had no significant effect on microbial load, niacin content, color, or cook shrink and texture. Freezing rate had a significant effect upon TBA and FFA values. Niacin, cook shrink and moisture values declined and TBA and FFA values increased with storage. Raw meat Hunter L value increased and Hunter a/b value declined during storage. Substantial quality differences between meat types were found .

Units: Dual 

Citation: ASHRAE Transactions, 1986, vol. 92, pt. 2A, Portland, OR