Constitution of a water soluble hemicellulose from American beechwood (Fagus grandifolia)

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DOIResolve DOI: http://doi.org/10.1139/v57-077
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TypeArticle
Journal titleCanadian Journal of Chemistry
ISSN0008-4042
Volume35
Issue6
Pages556564; # of pages: 9
AbstractExtraction of beechwood chlorite holocellulose with hot water yielded a hemicellulose in 13.4% yield (based on original extractive-free wood) containing D-xylose 72%, D-galactose 11.0%, and uronic acid 13.2%. Purification of the crude hemicellulose by complexing with Fehling's solution yielded a chemically homogeneous fraction containing D-xylose 83% and 4-O-methyl-D-glucuronic acid 15.5%. Hydrolysis of the fully methylated hemicellulose yielded 2,3,4-tri-O-methyl-D-xylose, 2,3-di-O-methyl-D-xylose, 3-O-methyl-D-xylose, and 3-O-methyl-2-O-(2,3,4-tri-O-methyl-D-glucopyranosyluronic acid)-D-xylose in a molar ratio of 2:35:3:5. On the basis of the methylation data, periodate oxidation, reducing power determinations, and weight average molecular weight values a possible structure for the hemicellulose is proposed.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NRC number4326
NPARC number21274496
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Record identifierc07e341e-f973-495b-a9ed-418ad349851b
Record created2015-03-16
Record modified2016-05-09
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