The phytochemical rich potential of acorn (Quercus aegilops) products and by products

The phytochemical content of acorn ( Quercus aegilops ) products (nuts and flour) and by products (shells and leaching waters) regarding their content in total phenols, fatty acids, sodium, potassium and calcium was investigated. Antioxidant activity was also examined. Acorn materials presented high...

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Bibliographic Details
Published in:Food science and biotechnology 2018, 27(3), , pp.819-828
Main Authors: Papoti, Vassiliki T., Kizaki, Nikoleta, Skaltsi, Alexia, Karayannakidis, Panayotis D., Papageorgiou, Maria
Format: Article
Language:English
Subjects:
Antioxidants
By products
Byproducts
Calcium
Chemistry
Chemistry and Materials Science
Fatty acids
Flour
Food Science
Gallic acid
Goat grass
Leaching
Molecular chains
Molecular weight
Molecular weight distribution
Nutrition
Nuts
Peptides
Phenols
Phytochemicals
Potassium
Proteins
Quercus
Shells
Sodium
Sodium chloride
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Summary:The phytochemical content of acorn ( Quercus aegilops ) products (nuts and flour) and by products (shells and leaching waters) regarding their content in total phenols, fatty acids, sodium, potassium and calcium was investigated. Antioxidant activity was also examined. Acorn materials presented high total phenol content (up to 47.6 ± 0.6 mg gallic acid equivalents (GAE)/g dry material), with a substantial amount remaining after leaching (11.6 ± 0.7 mg GAE/g flour), and high DPPH radical scavenging and ferric reducing activity. Their content in potassium, calcium, oleic and linoleic acids was considered significant. Molecular weight distribution of proteins and peptides was also studied and found between 7 and 45 kDa; only for acorn shells a band > 250 kDa appeared. Leaching parameters (time, material size, material to water ratio, temperature, NaCl presence) significantly affected the phytochemical content of the remained leached material.
ISSN:1226-7708
2092-6456
DOI:10.1007/s10068-017-0293-x