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Flax ( Linum usitatissimum ) Seed Cake: A Potential Source of High Molecular Weight Arabinoxylans?

Abstract : Water-soluble polysaccharides were extracted from flaxseed cake and analyzed. Two groups were separated by anion-exchange chromatography. The first one (nonretained) was the major fraction (83%) and possessed a high molecular weight (HMW) arabinoxylan (56%) with an Ara/Xyl ratio of 0.32 and an Mw of 846 000. This polymer was accompanied by a smaller galactoglucan (44%), with an Mw of 6.5 × 104. The latter group (17%), retained by the gel, was further described as a HMW pectin heterogeneous group, with, respectively, 3.1 × 105 and 1.3 × 105. Despite the presence of HMW arabinoxylans, the investigation of rheological flow sweep at the concentration of 2% (w/v) has shown a slight shear thinning behavior with a small zero-rate viscosity at 9.6 Pa·s.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-01866861
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Submitted on : Monday, September 3, 2018 - 4:32:21 PM
Last modification on : Wednesday, December 4, 2019 - 11:18:17 AM

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J. Warrand, P. Michaud, L. Picton, G. Muller, B. Courtois, et al.. Flax ( Linum usitatissimum ) Seed Cake: A Potential Source of High Molecular Weight Arabinoxylans?. Journal of Agricultural and Food Chemistry, American Chemical Society, 2005, 53 (5), pp.1449 - 1452. ⟨10.1021/jf048910d⟩. ⟨hal-01866861⟩

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