Isolation and Characterization of Hemicellulose from a Ginkgo Nut Shell

スポンサーリンク

概要

• 論文の詳細を見る

• この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。A preliminary investigation was attempted for characterization of hemicelluloses occurring in a ginkgo nut shell. The hemicellulose was isolated by successive extraction of a preparative meal treated with sodium chlorite with 24 % aqueous KOH and with 17.5 % aqueous NaOH containing 5 % boric acid. The hemicellulose was subjected to fractional precipitation repeatedly with barium hydroxide. A galacto-glucomannan which was obtained by further fractionation on QAE-Sephadex A-50 (acetate form) of the glucomannan fraction was electrophoretically and ultracentrifugally homogeneous. The polysaccharide which contained the residues of D-galactose, D-glucose and D-mannose in the molar ratio of 0.3 : 1.0 : 1.7, respectively, gave a specific rotation of [α]_D^<20>-19.3° (c=1.80, H_2O). The hemicellulose of a ginkgo nut shell gave an arabino-(4-0-methyl-D-glucurono) xylan, a galacto-glucomannan and other polysaccharides in the respective yields of 9.8 %, 2.6% and 0.8% on the basis of a preparative defatted meal. These results showed that the hemicellulose of ginkgo nut shell contained much higher amounts of the xylan fraction rather than the glucomannan fraction.

• 1975-03-31

著者

• Kitao Koichiro

  Division Of Wood Chemistry Wood Research Institute Kyoto University

• MAEKAWA Eiichi

  Division of Wood Chemistry, WOOD RESEARCH INSTITUTE, KYOTO UNIVERSITY

関連論文

• Isolation and Characterization of Hemicellulose from a Ginkgo Nut Shell
• Photochemical Dimerization of Resin Acids
• Isolation of Pterocarpanoid Compounds as Heartwood Constituents of Maackia amurensis RUPR. et MAXIM, var. Buergeri SCHNEID

スポンサーリンク