Abstract
The aim of this research was to characterize the lamb M. longissimus dorsi (LD), M. semitendinosus (ST), and M. psoas major (PM) muscles for differences in instrumental colour, tissue oxygen consumption rate (OCR), mitochondrial respiration control ratio (RCR), metmyoglobin reductase activity (MRA), and the relative proportions of myoglobin (Mb) redox forms. LD, ST, and PM muscles were stored for 6 days at 4 °C. Changes in the instrumental colour (CIE L*-value, a*-value, b*-value, Chroma-value, and Hue-value), OCR, RCR, MRA, and relative proportions of Mb redox forms during storage were evaluated. LD revealed the lowest MetMb accumulation and highest colour stability. Muscles with higher colour stability had lower levels of OCR, higher MRA, and less MetMb accumulation. Colour stability and MRA for the lamb muscles were LD > ST > PM. The correlation coefficients among the main parameters were also investigated in this research. The correlation coefficients between a*-value and OxyMb within the same muscle were highly significant (r = 0.951, 0.974, 0.828; P < 0.05). MRA of the muscles was negatively correlated (r = −0.810, −0.942, −0.971, P < 0.05) with the relative percentage of MetMb. The results of the present study suggested that OCR, RCR and MRA contribute to variation in colour stability of different lamb muscles.
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Acknowledgments
We gratefully acknowledge the financial support by Nature Science Foundation of China (Project No: 31071624) and the Ministry of Agriculture of China (China Agriculture Research System-39, CARS-39).
Conflict of interest
Ruitong Dai has received research grants from Nature Science Foundation of China (Project No: 31071624) and the Ministry of Agriculture of China (China Agriculture Research System-39, CARS-39). Li Xie, Zhenyu Wang, Xingmin Li, Hailing Luo, Changwei Ma, Ruitong Dai declare no conflict of interest.
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All institutional and national guidelines for the care and use of laboratory animals were followed.
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Ruitong Dai and Changwei Ma have equally contributed to this manuscript.
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Gao, X., Xie, L., Wang, Z. et al. Effect of postmortem time on the metmyoglobin reductase activity, oxygen consumption, and colour stability of different lamb muscles. Eur Food Res Technol 236, 579–587 (2013). https://doi.org/10.1007/s00217-012-1903-8
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DOI: https://doi.org/10.1007/s00217-012-1903-8