title: Identification and characterisation of water and alkali soluble oligosaccharides from hazelnut skin (Corylus avellana L.).
abstract: 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 34mg 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.
authors.affiliation: Dipartimento di Scienze del Farmaco & Drug and Food Biotechnology Center, Università degli Studi del Piemonte Orientale "A. Avogadro", Largo Donegani 2, 28100 Novara, Italy.
authors.forename: Rosa
authors.initials: R
authors.lastname: Montella
authors.forename: Jean Daniel
authors.initials: JD
authors.lastname: Coïsson
authors.forename: Fabiano
authors.initials: F
authors.lastname: Travaglia
authors.forename: Monica
authors.initials: M
authors.lastname: Locatelli
authors.forename: Matteo
authors.initials: M
authors.lastname: Bordiga
authors.forename: Mickael
authors.initials: M
authors.lastname: Meyrand
authors.forename: Daniela
authors.initials: D
authors.lastname: Barile
authors.forename: Marco
authors.initials: M
authors.lastname: Arlorio
mesh_terms: D031211:Corylus / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D009754:Nuts / Q000737:chemistry*; D009844:Oligosaccharides / Q000737:chemistry* / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D012995:Solubility
chemical_list: D009844:Oligosaccharides; D010936:Plant Extracts