Isolation and characterisation of hemicelluloses from sunflower hulls

✍ Scribed by Anne Bazus; Luc Rigal; Antoine Gaset; Thierry Fontaine; Jean-Michel Wieruszeski; Bernard Fournet

• Book ID: 102993861
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 598 KB
• Volume: 243
• Category: Article
• ISSN: 0008-6215
• DOI: 10.1016/0008-6215(93)87036-r

✦ Synopsis

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.