title: An alkali-soluble heteroxylan from seeds of Phoenix dactylifera L.
abstract: Alkali-soluble polysaccharides, isolated from the seeds of dates, have been investigated using methylation and partial hydrolysis studies. The polysaccharides are shown to contain D-xylose and 4-O-methyl-D-glucuronic acid in a molar ratio of 5:1. An aldobiouronic acid from hemicellulose was characterized, and investigation revealed that the hemicellulose consists of a polymer of (1-->4)-linked D-xylopranosyl residues having branches of D-xylopyranosyl and 4-O-methyl-alpha-D-glucopyranosyluronic acid.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou 310027, PR China.
authors.forename: Omar
authors.initials: O
authors.lastname: Ishurd
authors.forename: Yousef
authors.initials: Y
authors.lastname: Ali
authors.forename: Wanxing
authors.initials: W
authors.lastname: Wei
authors.forename: Fatma
authors.initials: F
authors.lastname: Bashir
authors.forename: Amna
authors.initials: A
authors.lastname: Ali
authors.forename: Ahmed
authors.initials: A
authors.lastname: Ashour
authors.forename: Yuanjiang
authors.initials: Y
authors.lastname: Pan
mesh_terms: D000468:Alkalies / Q000737:chemistry; D028023:Arecaceae / Q000737:chemistry*; D002240:Carbohydrate Sequence; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008745:Methylation; D008969:Molecular Sequence Data; D010936:Plant Extracts / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry; D012639:Seeds / Q000737:chemistry*; D012995:Solubility; D014990:Xylans / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D000468:Alkalies; D010936:Plant Extracts; D011134:Polysaccharides; D014990:Xylans; C007916:hemicellulose