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  • Title: Isolation and characterisation of hemicelluloses from sunflower hulls.
    Author: Bazus A, Rigal L, Gaset A, Fontaine T, Wieruszeski JM, Fournet B.
    Journal: Carbohydr Res; 1993 May 07; 243(2):323-32. PubMed ID: 8348544.
    Abstract:
    The hemicelluloses extracted from sunflower hulls by repeated alternating oxidative and alkaline treatments were purified by precipitation with Cetavlon and then ion-exchange chromatography on DEAE-trisacryl. The resulting fractions were examined by hydrolysis, methylation, GLC-MS, and NMR spectroscopy. The hemicelluloses are of the glucuronoxylan type with the following structure -->4)-beta-D-Xylp-(1-->4)-[4-O-Me-alpha-D-GlcpA-(1-->2)]-bet a-D-Xylp-(1-->. The polysaccharides differed in the amount of branching; the ratio of the main fraction 4-O-MeGlcA:Xyl was 1:8-9.
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