リグノセルロースの硫酸2段階抽出から純度の高いグルコース画分を得る新しい調製法の研究

DOI 日本農学文献記事索引 Web Site Web Site 被引用文献2件 参考文献31件
  • T.A.T.P. タラガラ
    三重大学大学院生物資源学研究科食品資源工学研究室
  • 児玉 祥太郎
    三重大学大学院生物資源学研究科食品資源工学研究室
  • 三島 隆
    三重大学大学院生物資源学研究科食品資源工学研究室
  • 磯野 直人
    三重大学大学院生物資源学研究科食品資源工学研究室
  • 古城 敦
    王子製紙株式会社研究開発本部総合研究所バイオ関連研究セクション
  • 川崎 優子
    王子製紙株式会社研究開発本部総合研究所バイオ関連研究セクション
  • 久松 眞
    三重大学大学院生物資源学研究科食品資源工学研究室

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タイトル別名
  • Study on a New Preparation of D-Glucose Rich Fractions from Various Lignocelluloses through a Two-step Extraction with Sulfuric Acid

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Preparing D-glucose with comparatively high yield and purity from many kinds of lignocelluloses through a basically unified method is an important technology because almost all of the yeasts show limitative use of carbon sources in ethanol fermentation. Although cellulase is of great interest in the production of D-glucose, the enzyme degradation demands a pre-treatment for loosening the hard structure of lignocelluloses. A typical acid hydrolysis of lignocelluloses digesting directly to monosaccharides is also used; however, the hydrolysate contains not only a mixture of pentose and hexose but also some chemicals inhibiting the growth of yeast. Therefore, representative samples of hardwood (Japanese oak), softwood (Japanese cedar) and annual plants (sugar cane bagasse) were examined in order to look for a convenient method of collecting oligosaccharides from these biomasses employing the concept that high-molecular-weight molecules with hard structure are gradually loosened and then degraded into low-molecular-weight molecules with strong alkaline or strong acid under mild conditions. Potassium hydroxide was suitable for the annual plant but insufficient for wood in the segregation of hemicellulose and cellulose. Concentrations of sulfuric acid for extracting selectively the majority of hemicelluloses from annual plants and wood were 42.5 and 44% (v/v), respectively. Lignocellulose (100 mg) was treated with the concentrated sulfuric acid (10 mL) at 20°C for 5 h under 120 rpm shaking condition. A treatment with 55% (v/v) sulfuric acid of the residual material under the same conditions was appropriate for preparation of oligosaccharides composed chiefly of D-glucose.

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