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The influence of acid whey on the antioxidant peptides generated to reduce oxidation and improve colour stability in uncured roast beef
Author(s) -
Wójciak Karolina M,
Kęska Paulina,
Okoń Anna,
Solska Elżbieta,
Libera Justyna,
Dolatowski Zbigniew J
Publication year - 2018
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.8883
Subject(s) - tbars , chemistry , lipid oxidation , food science , antioxidant , nitrite , whey protein , biochemistry , lipid peroxidation , nitrate , organic chemistry
Abstract BACKGROUND The effect of marinating beef in acid whey on the antioxidant peptides generated, and their influence on lipid oxidation, colour stability, sensory analysis and protein degradation products in uncured roasted beef stored 6 weeks in vacuum conditions (T = 4 °C) were determined. Measurements of pHe, water activity, oxidation–reduction potential, colour, TBARS, the cutting force, texture and amino acid profile, the total content of peptides, and antioxidant activity of isolated peptides were conducted immediately after production and during 42 days of storage. RESULTS The non‐nitrite control batch (C) was characterized by a lower a* value (6.33–6.70) during the whole storage period compared to the non‐nitrite sample with acid whey (W). It also appears that meat with the worst colour stability has the poorest oxidative stability (C = 1.57 mg MDA kg −1 , W = 0.76 mg MDA kg −1 ). Activity against reactive forms of oxygen to fraction A and fraction B ( P  < 0.05) showed an increasing trend with time and it was the largest in sample C and W. CONCLUSION The results indicated that bioactive peptides could be generated in uncured roasted beef. The <3.5 kDa peptides have strong antioxidant activity, as a result of which they function as inhibitors of lipid oxidation and colour discoloration during prolonged storage. © 2018 Society of Chemical Industry

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