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Fractionation and characterisation of dietary fibre from blackcurrant pomace

Alba, Katerina; Macnaughtan, William; Laws, Andrew; Foster, Tim; Campbell, Grant; Kontogiorgos, Vassilis

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Authors

Katerina Alba

William Macnaughtan

Andrew Laws

Tim Foster

Grant Campbell

Vassilis Kontogiorgos



Abstract

The potential of blackcurrant pomace as a raw material for the extraction of dietary fibre was evaluated using two pomaces one sourced from the UK and one from Poland. A fractionation protocol was designed to isolate and subsequently quantify the soluble and insoluble dietary fibre fractions. Blackcurrant pomace and isolated pectins, hemicelluloses and celluloses were assessed by means of sugar compositional analysis, spectroscopy, size exclusion chromatography and dilute solution viscometry. The blackcurrant pomaces presented considerable amounts of dietary fibre with soluble fibre ranging from 25-30% w/w and insoluble dietary fibre accounting for about 47% w/w for both pomaces. Blackcurrant pomaces differed in the amount of extracted pectins with an almost two times higher pectin yield obtained from blackcurrant pomace sourced from Poland. The hemicellulosic polysaccharide content was 15% w/w whereas the amount of cellulosic fraction varied from 14-17% w/w. Pectins isolated from both blackcurrant pomaces were LM pectins with a degree of esterification in the range of 11-38%. The work has identified that dietary fibres obtained from blackcurrant pomace had desirable ratio of insoluble to soluble fibre and are a potential new source of dietary fibre.

Journal Article Type Article
Acceptance Date Mar 12, 2018
Online Publication Date Mar 13, 2018
Publication Date Aug 1, 2018
Deposit Date Mar 14, 2018
Publicly Available Date Mar 14, 2019
Journal Food Hydrocolloids
Print ISSN 0268-005X
Electronic ISSN 1873-7137
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 81
DOI https://doi.org/10.1016/j.foodhyd.2018.03.023
Keywords blackcurrant; dietary fibre; pectin; cellulose; NMR
Public URL https://nottingham-repository.worktribe.com/output/960813
Publisher URL https://www.sciencedirect.com/science/article/pii/S0268005X18301061

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