title: Structural characterization of dietary fiber of green chalcumra (Benincasa hispida) fruit by NMR spectroscopic analysis.
abstract: A water-soluble dietary fiber was isolated from the hot aqueous extract of Chalcumra (Benincasa hispida) fruit. The polysaccharide was found to contain D-galactose and D-methyl galacturonate in a molar ratio of 2:1. On the basis of acid hydrolysis, methylation analysis, periodate oxidation, and NMR spectroscopic studies (1H, 13C, TOCSY, DQF-COSY, NOESY, ROESY, HMQC, and HMBC), the repeating unit of the polysaccharide was established as -->4)-beta-D-Galp-(1-->4)-beta-D-Galp-(1-->2)-alpha-D-GalpA6Me-( 1-->.
authors.affiliation: Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India.
authors.forename: Debsankar
authors.initials: D
authors.lastname: Das
authors.forename: Subhas
authors.initials: S
authors.lastname: Mondal
authors.forename: Debabrata
authors.initials: D
authors.lastname: Maiti
authors.forename: Sadhan K
authors.initials: SK
authors.lastname: Roy
authors.forename: Syed S
authors.initials: SS
authors.lastname: Islam
mesh_terms: D002236:Carbohydrate Conformation; D019662:Cucurbitaceae / Q000737:chemistry*; D004043:Dietary Fiber; D005638:Fruit / Q000737:chemistry*; D005690:Galactose / Q000737:chemistry / Q000302:isolation & purification; D006603:Hexuronic Acids / Q000737:chemistry / Q000302:isolation & purification; D019906:Nuclear Magnetic Resonance, Biomolecular; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D004043:Dietary Fiber; D006603:Hexuronic Acids; D011134:Polysaccharides; C007819:galacturonic acid; D005690:Galactose