Beef patties containing either ascorbic acid, rosemary, oregano, or borage were evaluated for storage stability at 2 ± 1 °C, by measuring a* and H* values, surface metmyoglobin, TBARS, psychrotrophic bacteria counts, and sensory off‐odor and discoloration. All of the antioxidants (except ascorbic acid) reduced ( p < 0.01) TBARS formation, which was totally inhibited by borage. Myoglobin oxidation and color fading were inhibited ( p < 0.01) by rosemary, oregano, and borage. Microbial growth showed insignificant differences among treatments. Sensory results showed that rosemary, oregano, and borage extended beef patties' shelf life from 8 to 12 d, while rosemary plus ascorbic acid extended shelf life an additional 4‐d period.
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Sánchez‐Escalante et al. (2003) studied this question.
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