scholarly journals L-theanine attenuates transport stress-induced impairment of meat quality of broilers through improving muscle antioxidant status

2019 ◽  
Vol 98 (10) ◽  
pp. 4648-4655 ◽  
Author(s):  
C Zhang ◽  
Z.Y. Geng ◽  
K.K. Chen ◽  
X.H. Zhao ◽  
C Wang
Keyword(s):  
Meat Quality ◽  
Antioxidant Status ◽  
Transport Stress

The effect of polyphenols and vitamin E on the antioxidant status and meat quality of broiler chickens exposed to high temperature

2019 ◽  
Vol 73 (2) ◽  
pp. 111-126 ◽  
Author(s):  
Magdalena Mazur-Kuśnirek ◽  
Zofia Antoszkiewicz ◽  
Krzysztof Lipiński ◽  
Joanna Kaliniewicz ◽  
Sylwia Kotlarczyk ◽  
...  
Keyword(s):  
High Temperature ◽  
Vitamin E ◽  
Meat Quality ◽  
Broiler Chickens ◽  
Antioxidant Status

Resveratrol beneficially affects meat quality of heat-stressed broilers which is associated with changes in muscle antioxidant status

2017 ◽  
Vol 88 (10) ◽  
pp. 1569-1574 ◽  
Author(s):  
Cheng Zhang ◽  
Xiaohui Zhao ◽  
Li Wang ◽  
Lei Yang ◽  
Xingyong Chen ◽  
...  
Keyword(s):  
Meat Quality ◽  
Antioxidant Status

scholarly journals The effect of polyphenols and vitamin E on the antioxidant status and meat quality of broiler chickens fed low-quality oil

2019 ◽  
Vol 62 (1) ◽  
pp. 287-296 ◽  
Author(s):  
Magdalena Mazur-Kuśnirek ◽  
Zofia Antoszkiewicz ◽  
Krzysztof Lipiński ◽  
Joanna Kaliniewicz ◽  
Sylwia Kotlarczyk
Keyword(s):  
Fatty Acids ◽  
Vitamin E ◽  
Meat Quality ◽  
Broiler Chickens ◽  
Antioxidant Status ◽  
Dietary Supplementation ◽  
Negative Control ◽  
Enzymatic Antioxidants ◽  
Group I

Abstract. The aim of this study was to determine the effect of vitamin E and polyphenols on the antioxidant potential and meat quality of broiler chickens fed diets supplemented with low-quality oil. The experimental materials comprised 120 male Ross 308 broilers (six treatments, 10 replications, two birds per replication). Dietary supplementation with vitamin E and/or polyphenols was applied in the following experimental design: group I (negative control) – without supplementation without low-quality oil; group II (positive control) – without supplementation + low-quality oil; group III – supplementation with 100 mg kg−1 of vitamin E+ low-quality oil; group IV – 200 mg kg−1 of vitamin E + low-quality oil; group V – 100 mg kg−1 of vitamin E and 100 mg kg−1 of polyphenols + low-quality oil; group VI – 200 mg kg−1 of polyphenols + low-quality oil. Rapeseed oil oxidised under laboratory conditions was added to the diets of broiler chickens from groups II to VI. The applied antioxidants had no effect on the growth performance of chickens fed oxidised oil. Increased dietary inclusion levels of vitamin E and/or polyphenols improved the antioxidant status in the blood and increased the content of non-enzymatic antioxidants in the liver and breast muscles of broilers fed low-quality oil. The tested antioxidants had no influence on carcass quality parameters in chickens fed oxidised oil. However, birds fed diets with the addition of vitamin E were characterised by a higher gizzard weight and higher pH of gizzard digesta. Dietary supplementation with vitamin E and polyphenols or polyphenols alone contributed to a lighter colour and lower pH of breast muscles and an increase in the content of fat and ash in the breast muscles of broilers fed oxidised oil. The breast muscles of birds given 100 or 200 mg kg−1 of supplemental vitamin E were characterised by higher concentrations of n-6 polyunsaturated fatty acids (PUFAs) and hypocholesterolemic fatty acids (DFAs), a more desirable DFA∕OFA ratio, and a lower atherogenicity index (AI). Polyphenols combined with vitamin E can be a valuable component of diets for broiler chickens when the problem of low-quality oil occurs.

Effects of transport stress and rest before slaughter on blood parameters and meat quality of ducks

2014 ◽  
Vol 94 (4) ◽  
pp. 595-600 ◽  
Author(s):  
Zhen Zhu ◽  
Yang Chen ◽  
Zhengyang Huang ◽  
Yang Zhang ◽  
Qi Xu ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Glutathione Peroxidase ◽  
Meat Quality ◽  
Blood Parameters ◽  
Protein Carbonyl ◽  
Enzyme Linked Immunosorbent Assay ◽  
Long Distance ◽  
Rest Time ◽  
Transport Stress

Zhu, Z., Chen, Y., Huang, Z., Zhang, Y., Xu, Q., Tong, Y., Zhai, F., Chang, G. and Chen, G. 2014. Effects of transport stress and rest before slaughter on blood parameters and meat quality of ducks. Can. J. Anim. Sci. 94: 595–600. Ducks have been transported to be slaughtered at centralized locations since the 2013 avian influenza A (H7N9) epidemics in China. It is unavoidable that a certain amount of stress will occur during the transportation. We investigated the effects of transport stress and rest before slaughter on blood parameters and meat quality in ducks. Pekin ducks (42 d old) were randomly divided into six groups. Each group had five replicates, with four ducks in each replicate. The experimental design included the variables transport time and rest time before slaughter. Transport distance categories were short-distance (1 h transport; n=20), medium-distance (2 h transport; n=20) and long-distance (3 h transport; n=20) transport. Rest time was categorized as short (0.5 h; n=20) or long (2 h; n=20) periods of rest. Blood samples and meat samples were collected after transport or after the post-transport rest period. Blood indicators (triiodothyronine, thyroxine, insulin, glutamic-pyruvic transaminase, aspartate transaminase, creatine kinase, and glutathione peroxidase) were measured using enzyme-linked immunosorbent assay (ELISA) kits. Meat quality characteristics (meat component, pH, malondialdehyde, and protein carbonyl) were also measured. Triiodothyronine, thyroxine, aminotransferase, glutamic-oxaloacetic transaminase, creatine kinase, glutathione peroxidase, pH, malondialdehyde, and protein carbonyl values changed significantly in ducks exposed to the medium-distance transport treatment. Stress indicators improved and meat quality returned to normal by the end of a 2-h pre-slaughter rest. These results indicate that a 2-h transport causes serious stress in ducks. A 2-h rest before slaughter mitigates these adverse effects.

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