Hydrothermally treated xylan rich by-products yield different classes of xylo-oligosaccharides

Kabel, MA; Carvalheiro, F; Garrote, G; Avgerinos, E; Koukios, E; Parajo, JC; Girio, FM; Schols, HA; Voragen, AGJ

dc.contributor.author	Kabel, MA	en
dc.contributor.author	Carvalheiro, F	en
dc.contributor.author	Garrote, G	en
dc.contributor.author	Avgerinos, E	en
dc.contributor.author	Koukios, E	en
dc.contributor.author	Parajo, JC	en
dc.contributor.author	Girio, FM	en
dc.contributor.author	Schols, HA	en
dc.contributor.author	Voragen, AGJ	en
dc.date.accessioned	2014-03-01T01:17:58Z
dc.date.available	2014-03-01T01:17:58Z
dc.date.issued	2002	en
dc.identifier.issn	0144-8617	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14728
dc.subject	Brewery's spent grain	en
dc.subject	Corn cob	en
dc.subject	Eucalyptus wood	en
dc.subject	Wheat bran	en
dc.subject	Xylan-oligosaccharides	en
dc.subject.classification	Chemistry, Applied	en
dc.subject.classification	Chemistry, Organic	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Byproducts	en
dc.subject.other	Degradation	en
dc.subject.other	Feedstocks	en
dc.subject.other	Hydrothermal synthesis	en
dc.subject.other	Wood	en
dc.subject.other	Hydrothermal treatment	en
dc.subject.other	Cellulose	en
dc.subject.other	Byproducts	en
dc.subject.other	Cellulose	en
dc.subject.other	Degradation	en
dc.subject.other	Depolymerization	en
dc.subject.other	Eucalyptus	en
dc.subject.other	Xylans	en
dc.subject.other	Eucalyptus	en
dc.subject.other	Triticum aestivum	en
dc.subject.other	Zea mays	en
dc.title	Hydrothermally treated xylan rich by-products yield different classes of xylo-oligosaccharides	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0144-8617(02)00045-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0144-8617(02)00045-0	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	Four xylan rich by-products, namely wheat bran, brewery's spent grain, corn cobs and Eucalyptus wood, were characterised and subjected to a mild hydrothermal treatment in order to release and degrade the xylan from the starting materials. The chemical characterisation of the feedstock materials, with emphasis on the extracted xylan fractions and using enzymatic degradation of these xylans, resulted in rather detailed pictures of the xylans present. Depending on the feedstock material studied, the xylan present was substituted with arabinose, 4-O-methylglucuronic acid and acetyl groups. During the hydrothermal treatment, arabinose was rather easily removed from the xylan-backbone (wheat bran, brewery's spent grain and corn cobs). The acetyl groups were partly released from the feedstocks, becoming available to catalyse the depolymerisation of the xylan. Also, part of the uronic acids were released, mainly during the treatment of Eucalyptus wood. Due to the partial release of the substituents and cleavage of the xylan by the treatment performed, a wide variety of xylo-oligosaccharides with different structural features corresponding to the xylan-structure of the original feedstock were obtained. Xylo-oligosaccharides branched with arabinose were identified in the hydrolysate from brewery's spent grain, while in the hydrolysate of corn cobs and Eucalyptus wood xylo-oligosaccharides substituted with 4-O-methylglucuronic acid were present as well. Additionally, a series of partially acetylated (acidic) xylo-oligosaccharides was identified in the Eucalyptus wood hydrolysate. (C) 2002 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Carbohydrate Polymers	en
dc.identifier.doi	10.1016/S0144-8617(02)00045-0	en
dc.identifier.isi	ISI:000176502800007	en
dc.identifier.volume	50	en
dc.identifier.issue	1	en
dc.identifier.spage	47	en
dc.identifier.epage	56	en