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University of Kentucky

Beef color stability

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Myoglobin Post-Translational Modifications And Fresh Beef Color Stability, Yifei Wang Jan 2020

Myoglobin Post-Translational Modifications And Fresh Beef Color Stability, Yifei Wang

Theses and Dissertations--Animal and Food Sciences

Surface color of fresh beef is the major trait influencing consumers’ purchase decisions. Fresh beef color is determined by the myoglobin (Mb) redox stability. Post-translational modifications (PTMs) play a critical role in regulating Mb structure and functionality. This thesis focuses on the PTMs in Mb and their impact on fresh beef color stability.

In the first experiment, Mb PTMs in beef longissimus lumborum (LL) muscle during postmortem aging and their influence on fresh beef color stability were examined. Beef LL muscle from nine (n = 9) beef carcasses (24 h postmortem) were subjected to wet-aging for 0, 7, 14 …