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Effect of solution p H and activated carbon dosage on the decolourization ability, nitrogen components and antioxidant activity of peanut meal hydrolysate
Author(s) -
Xiao Chuqiao,
Zheng Lin,
Su Guowan,
Zhao Mouming
Publication year - 2014
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/ijfs.12587
Subject(s) - hydrolysate , chemistry , antioxidant , activated carbon , nitrogen , carbon fibers , amino acid , food science , chromatography , adsorption , organic chemistry , nuclear chemistry , biochemistry , hydrolysis , materials science , composite number , composite material
Summary Activated carbon was used to remove the colour of peanut meal hydrolysate. Effects of solution p H and activated carbon dosages on the decolourization efficiency, nitrogen components and antioxidant activity of the hydrolysate were investigated. The results showed that the colour and the undigested protein or large peptides could be removed efficiently under acidic condition (p H 2.0–4.0), while less small peptides were adsorbed under this condition. Among these total amino acids ( AAs ), the loss of aromatic AA (Tyr and Phe) was the largest regardless of the solution p H . Greater loss of acidic AA (Glu and Asp) was observed under acidic condition, while the loss of basic AA (His, Lys and Arg) followed the opposite trend. The antioxidant activity of the hydrolysate was also reduced after decolourization, which was likely due to the loss of total phenolics and peptides containing aromatic and/or acidic AA .