title: Isolation and characterizartion of alginic acid from commercially cultured Nemacystus decipiens (Itomozuku).
abstract: An alginate was isolated from commercially cultured Nemacystus decipiens which had been harvested in Yonashiro Town (Okinawa, Japan). The yield of the alginate was 1.6% (w/w of wet alga), and the uronic acid, ash and moisture contents of the alginate were 86.0%, 12.0%, and 2.3% (w/w), respectively. The molecular mass of the alginate was estimated to be about 1.5 x 10(5). The infrared spectrum and optical rotation of the alginate were in agreement with those of the standard alginate. D-Mannuronic acid and L-guluronic acid were identified by 1H- and 13C-NMR spectroscopy, the molar ratio of both sugar residues being estimated to be 0.72:1.00.
authors.affiliation: Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Tako
authors.forename: S
authors.initials: S
authors.lastname: Kiyuna
authors.forename: S
authors.initials: S
authors.lastname: Uechi
authors.forename: F
authors.initials: F
authors.lastname: Hongo
mesh_terms: D000464:Alginates / Q000032:analysis*; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D000459:Phaeophyceae / Q000737:chemistry* / Q000254:growth & development
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D020723:Glucuronic Acid