Abstract

ABSTRACT Effects of irradiation (2 kGy) of ground beef from trimmings aged 3, 6, or 9 days postmortem (PM) and packaged aerobically or anaerobically on lean color and aroma were investigated. Irradiation increased off‐odors and reduced color scores and Hunter a* (redness) and b* (yellowness) values (P < 0.05). Aerobic packaging increased (P < 0.05) off‐odors and Hunter L* (lightness) and b* values while reducing color scores and a* values. Irradiated patties made from trimmings of the shortest aged meat, 3‐days, had higher color scores and a* values, compared to irradiated samples aged 6‐ and 9‐days PM (P < 0.05). Irradiated patties packaged aerobically had more (P < 0.05) off‐odors, hue angle and L* and b* values and lower color scores and a* values when compared to irradiated anaerobic patties. Thus, irradiated beef patties should be made of short aged trimmings and anaerobically packaged to prevent discoloration and off‐odors.

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