The methoxy group of beta-O-methyl glucuronic acid is central for the formation of hexenuronic acid during kraft pulping
2011 (English)In: O Papel, ISSN 0031-1057, Vol. 72, no 1, 54-65 p.Article in journal (Refereed) Published
Hexenuronic acid is created from 4-O-methyl gluc-uronic acid – a side chain group in xylan, and one of the most important hemicelluloses in both hardwood and softwood - during alkaline conditions, such as kraft pulping. Especially in hardwood kraft pulp, hexenuronic acid corresponds to a large part of the kappa number, and the presence of this component in bleached pulp causes post yellowing. In this work it is shown that glucuronic acid that lacks a methoxy group on the 4-carbon does not form hexenuronic acid under alkaline condition to the same extent as 4-O-methylglucuronic acid. This opens up novel strategies for genetic modification of the hemicellulose structures in wood cultivated for kraft pulping.
Place, publisher, year, edition, pages
2011. Vol. 72, no 1, 54-65 p.
β-elimination, bleaching, hexenuronic acid, kraft pulping, transgenic tree, xylan
Research subject SRA - Molecular Bioscience
IdentifiersURN: urn:nbn:se:kth:diva-49739ScopusID: 2-s2.0-84880070326OAI: oai:DiVA.org:kth-49739DiVA: diva2:460206
QC 20111202. Portugese title: "O grupo metóxido ácido 4-O-metil-glucurônico é fundamental para a formação de ácido hexenurônico durante a polpação kraft"2011-11-292011-11-292014-08-12Bibliographically approved