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Sequential fractionation of feruloylated hemicelluloses and oligosaccharides from wheat bran using subcritical water and xylanolytic enzymes
KTH, School of Biotechnology (BIO), Glycoscience.ORCID iD: 0000-0002-8533-1022
KTH, School of Biotechnology (BIO), Glycoscience.
KTH, School of Biotechnology (BIO), Glycoscience. Univ Adelaide, Australia.
KTH, School of Biotechnology (BIO), Glycoscience. Univ Adelaide, Australia.
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2017 (English)In: Green Chemistry, ISSN 1463-9262, E-ISSN 1463-9270, Vol. 19, no 8, 1919-1931 p.Article in journal (Refereed) Published
Abstract [en]

Wheat bran is a major by-product of cereal production that still has limited use for advanced nutritional and material applications. A sequential process using subcritical water, membrane filtration and selective enzymatic treatments has been designed for the combined fractionation of functional high molar mass hemicelluloses (over 10(5) g mol(-1)) and oligosaccharides from wheat bran. This process not only offers increased total solid yield compared with conventional protocols based on alkaline extraction, but it also preserves the inherent functionalities of the phenolic groups that substitute the carbohydrate structures of the extracted hemicelluloses. Feruloylated arabinoxylans (F-AX) with high molar mass and significant radical scavenging activity can be isolated from the subcritical water extract. Structurally different oligosaccharides, including mixed-linkage beta-D-glucan oligosaccharides (BGOs) and arabinoxylo-oligosaccharides (AXOs) can be recovered from the eluent after membrane filtration. The crosslinked residue after subcritical water extraction was further treated with xylanolytic enzymes to release valuable feruloylated arabinoxylo-oligosaccharides (FAXOs). The oligo-and polysaccharide fractions isolated from this sequential process show great potential for use as prebiotic or platform chemicals, and as polymeric matrices for carbohydrate-based materials with radical scavenging properties, respectively.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2017. Vol. 19, no 8, 1919-1931 p.
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-208245DOI: 10.1039/c6gc03473jISI: 000399579500012Scopus ID: 2-s2.0-85020188147OAI: oai:DiVA.org:kth-208245DiVA: diva2:1115679
Funder
Swedish Research Council Formas, 942-2016-119
Note

QC 20170627

Available from: 2017-06-27 Created: 2017-06-27 Last updated: 2017-06-27Bibliographically approved

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Ruthes, Andrea C.Martinez-Abad, AntonioTan, Hwei-TingBulone, VincentVilaplana, Francisco

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