Journal
FOOD CHEMISTRY
Volume 140, Issue 4, Pages 717-725Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2013.01.061
Keywords
Hazelnut; By-products; Oligosaccharides; Mass spectrometry; Bioactives
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Hazelnut skins are a good example of agricultural by-product with the potential to become a valuable source of functional ingredients. In this work, the fibre from hazelnut skins was extracted by using water and alkali solution and characterised by a suite of analytical tools (MALDI-FTICR, nano LC-Chip-Q-ToF and gas chromatography). Over thirty complex free oligosaccharides, composed mainly of galacturonic acid and N-acetylgalactosamine, were characterised for the first time in the present study. Their concentration ranged between 16 and 34 mg per g of extract. The oligosaccharides isolated from this agricultural by-product are mainly hexose oligosaccharides (potentially galacto-oligosaccharides,) and xyloglucans. The identified composition could justify the bioactive activity of the extracts, namely prebiotic activity, previously demonstrated. (C) 2013 Elsevier Ltd. All rights reserved.
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