Distribution of methoxyl and uronic acid groups in cereal straws

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DOIResolve DOI: http://doi.org/10.1139/cjr49b-093
AuthorSearch for: ; Search for:
TypeArticle
Journal titleCanadian Journal of Research
ISSN0366-6581
Volume27b
Issue12
Pages924932; # of pages: 9
AbstractThe distribution of methoxyl and uronic acid groups in wheat and oat straw has been investigated in the following successive fractions: extractive-free straw, pectin-free straw, holocellulose, hemicellulose "A", hemicellulose "B", and "α-cellulose" residue. About 18% of the total methoxyl content of extractive-free straws was found in the holocellulose fraction, the remainder being associated with the lignin portion. Methoxyl groups in the hemicellulose fractions and residues accounted for only about 70% of those present in the holocelluloses. No glycosidic methoxyls were found and the amount of ester methoxyl was too small to account for losses by saponification. The conclusion was reached that some of the ether methoxyls were cleaved during the alkali extraction of the holocelluloses. Methoxyl values in the α-cellulose residues as obtained by the Zeisel method were considerably greater than those of the trimethylamine procedure. Uronic acid groups of the extractive-free straw were almost quantitatively accounted for in the various fractions.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NRC number2035
NPARC number21274485
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Record identifierc61a681d-3d41-4a45-87df-b4f2160e1e10
Record created2015-03-16
Record modified2016-05-09
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