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1. Dietary citrus pulp and grape pomace as potential natural preservatives for extending beef shelf life

Author:
Tayengwa, Tawanda; Chikwanha, Obert C.; Gouws, Pieter; Dugan, Michael E.R.; Mutsvangwa, Timothy; Mapiye, Cletos
Source:
Meat science 2020 v.162 pp. 108029
ISSN:
0309-1740
Subject:
Angus; antioxidant activity; beef; beef cattle; biopreservatives; body weight; cattle finishing; citrus pulp; coliform bacteria; diet; grape pomace; lipids; longissimus muscle; microbial load; oxidation; packaging; shelf life; slaughter; steers; thiobarbituric acid-reactive substances
Abstract:
... The shelf-life of beef was compared from 7-months old Angus steers (281 ± 15.4 kg initial body weight) fed 150 g/kg DM dried citrus pulp (DCP) or grape pomace (DGP) for 90 days. The antioxidant activity, bacterial load, and lipid and protein oxidation were evaluated on the longissimus lumborum subjected to air-permeable packaging at days 1, 3, 5, 7 and 9 post-slaughter. Beef antioxidant activity w ...
DOI:
10.1016/j.meatsci.2019.108029

2. Inhibition of mitochondrial calcium uniporter enhances postmortem proteolysis and tenderness in beef cattle

Author:
Dang, David S.; Buhler, Jared F.; Davis, Haden T.; Thornton, Kara J.; Scheffler, Tracy L.; Matarneh, Sulaiman K.
Source:
Meat science 2020 v.162 pp. 108039
ISSN:
0309-1740
Subject:
autolysis; beef cattle; calcium; calpastatin; homeostasis; longissimus muscle; meat tenderness; mitochondria; proteolysis; steaks; tenderizing; texture
Abstract:
... The purpose of this study was to examine the role of mitochondria in postmortem calcium homeostasis and its effect on proteolysis and tenderness. We hypothesized that mitochondria buffer cytosolic calcium levels and delay the activation of calpain-1 and subsequently the development of meat tenderness. To test this hypothesis, pre-rigor bovine longissimus thoracis et lumborum muscle samples were in ...
DOI:
10.1016/j.meatsci.2019.108039

3. Phosphoproteomic analysis of longissimus lumborum of different altitude yaks

Author:
Yang, Yayuan; Han, Ling; Yu, Qunli; Gao, Yongfang; Song, Rende; Zhao, Suonan
Source:
Meat science 2020 v.162 pp. 108019
ISSN:
0309-1740
Subject:
altitude; bioinformatics; energy metabolism; enzymes; gene expression regulation; glycolysis; longissimus muscle; muscle protein; phosphoproteins; protein phosphorylation; protein synthesis; proteomics; yaks
Abstract:
... Yaks in high altitude regions display good adaptability to hypoxic environment. However, the mechanism involved in regulating muscle protein expression in hypoxic environment is not completely clear yet. To explore the mechanisms modulating postmortem alterations, quantitative phosphoproteomic analysis was performed on muscles of yaks raised at two different altitudes. The results indicated that 4 ...
DOI:
10.1016/j.meatsci.2019.108019