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| Titel: |
Fractional Extraction and Structural Characterization of Hemicelluloses from Wheat Straw |
| Auteur: |
Lawther, J. M. Sun, R. -C. Banks, W. B. |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 36 (1997) nr. 1-2 pagina's 53-64 |
| Jaar: |
1997-04-01 |
| Inhoud: |
The chemical composition of 7 hemicellulosic fractions extracted directly from dewaxed wheat straw with sodium hydroxide at sequentially increasing strength from 0.125 to 1.50 M are reported. The structural features of the fraction 3 were evaluated by means of methylation analysis and 13C-NMR spectroscopy. The hemicelluloses were confirmed to be a β(1-4)-xylan with side chains consisting of L-arabinofuranosyl and D-xylopyranosyl groups attached in position 3, and D-glucopyranosyluronic acid or 4-O-methyl-D-glucopyranosyluronic acid group attached at position 2. For every 15 D-xylopyranosyl residues in the main chain, there was one L-arabinofuranosyl group. For 19 such D-xylopyranosyl residues, there was one D-xylopyranosyl group, and for ∼26 such D-xylopyranosyl residues, there was one uronic acid unit. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 2 van 11 gevonden artikelen
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