| Literature DB >> 16618480 |
Cécile Barron1, Paul Robert, Fabienne Guillon, Luc Saulnier, Xavier Rouau.
Abstract
A set of arabinoxylan samples differing in their arabinose composition and various samples of arabino-xylo-oligosaccharide samples were analysed by Raman spectroscopy. Specific signatures for arabinose substitution were found in several spectral regions, that is, 400-600, 800-950 and 1030-1100 cm(-1). A linear relationship was observed between the peak ratio 855/895 cm(-1) of the second derivative spectra and the A/X ratio determined by chemical analysis. Moreover, spectral changes were observed in the 400-600 cm(-1) region assigned to the coupled vibrations mode in the skeleton: while the intensity of the band at 570 cm(-1) increased with the degree of substitution, that at 494 cm(-1) decreased. Similarly, a linear relationship was observed between the peak intensity ratio 570/494 cm(-1) calculated on the second derivative spectra and the composition data. Analysis of Raman spectra of arabino-xylo-oligosaccharides allowed to identify specific spectral features of disubstitution.Entities:
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Year: 2006 PMID： 16618480 DOI： 10.1016/j.carres.2006.03.025
Source DB: PubMed Journal: Carbohydr Res ISSN： 0008-6215 Impact factor: 2.104