Journal
MEAT SCIENCE
Volume 105, Issue -, Pages 121-125Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.meatsci.2015.03.014
Keywords
Yak; Bos grunniens; Muscle; Myoglobin oxidation; Antioxidant enzyme
Categories
Funding
- Sichuan Yak Production Program [2012NZ0047-03, 2012NZ0047-04, 2012NZ0047-05]
- National Nature Science Foundation of China [J1103518]
- National Beef Cattle Industrial Technology System [CARS-38]
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The influence of animal age and muscle source on the oxidative stability of yak steaks was examined. Longissimus thoracis (LT) muscles from yaks of different age groups (0.5, 1.5, 2.5, and 3.5 years), and three muscle sources of LT, Psoas major (PM), and Biceps femoris (BF) from yaks of 0.5, 1.5, and 2.5 years, were evaluated for metmyoglobin content, activity of antioxidant enzymes, and antioxidant capacity. Oxidative stability was influenced (P < 0.05) by muscle source and animal age. LT steaks from 0:5, 1.5, and 2.5 year old yaks exhibited lower (P < 0.05) metmyoglobin content than their PM and BF counterparts. Furthermore, LT steaks from 3.5 year old yaks demonstrated lower (P < 0.05) metmyoglobin content and greater (P < 0.05) activities of antioxidant enzymes than LT steaks from other age groups. These results indicated the necessity to develop muscle- and age-specific processing strategies to improve color and oxidative stability of yak meat. (C) 2015 Elsevier Ltd. All rights reserved.
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