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A new model for cellulose microfibril

Research Project

Project/Area Number 08306009
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 林産学
Research InstitutionThe University of Tokyo

Principal Investigator

OKANO Takeshi  Grd.School of Agr.& Life.Scis., Dept.of Biomaterial Sci., The Univ.of Tokyo, Professor, 大学院・農学生命科学研究科, 教授 (30011927)

Co-Investigator(Kenkyū-buntansha) SAMEJIMA Masahiro  Grd.School of Agr.& Life.Scis, The Univ.of Tokyo, Associate Professor, 大学院・農学生命科学研究科, 助教授 (30162530)
OKUYAMA Takashi  Dept of Appl.Bioscience, Nagoya Univ., Professor, 農学部, 教授 (00023482)
WADA Masahisa  Grd.School of Agr.& Life.Scis., The Univ.of Tokyo, Assistant Professor, 大学院・農学生命科学研究科, 助手 (40270897)
SAITO Yukie  Grd.School of Agr.& Life.Scis., The Univ.of Tokyo, Assistant Professor, 大学院・農学生命科学研究科, 助手 (30301120)
SUGIYAMA Junji  Wood Res.Inst., Kyoto Univ., Associate Professor, 木質科学研究所, 助教授 (40183842)
空閑 重則  東京大学, 大学院・農学生命科学研究科, 助教授 (60012051)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥10,600,000 (Direct Cost: ¥10,600,000)
Fiscal Year 1998: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1997: ¥5,500,000 (Direct Cost: ¥5,500,000)
Fiscal Year 1996: ¥2,400,000 (Direct Cost: ¥2,400,000)
KeywordsCellulose microfibril / Cellulose I_<beta> / Celulose I_<alpha> / Parallel packing structure / beta chitin / Cellulase / Valonia Cellulose / Non-crystalline region / セルロースI_β / セルロースI_α / セルロース / バロニア / シオグサ / 二相性 / 成長応力 / バクテリアセルロース / 結晶弾性率 / セルロースの圧電性 / 圧電
Research Abstract

(1) Structure and morphology of cellulose microfibril :
Cellulose chain was found to be in the unit cell with "parallel up" packing, and its reducing end coincides with the c-axis. Consequently, cellulose chain is synthesized on the non-reducing ends. Cellulose I beta crystal distorts some extent and, strictly speaking, it is imperfect crystal. Surface of the cellulose I alpha crystal might be different from that of I beta. It is likely that polymorph of native cellulose comes from with or without stress in the forming stage of the crystal. We succeeded in making a highly oriented film of cellulose microfibril. Neutron diffraction of this film revealed probable position of hydrogen in the cellulose crystal. Consequently, cellulose II crystal is an anti-parallel packing which is favorable to hydrophobic surfaces of the molecule. Beta chitin with parallel chain packing transforms into alpha form of anti-parallel one through swelling by HC1 solution in the similar process of cellulose I to II by alkali treatment.
(2) Properties of cellulose microfibril
Thermal expansion of cellulose crystal gave several new knowledges. The crystal expands to only aaxis direction. Resistibility of thermal decomposition depends on cellulose microfibril. We can estimate Poison's ratio of the cellulose crystal. Mechanical phenomena suggest an unstable crystalline region. Young's modulus of wood in the longitudinal direction indicates that orientation and density of non-crystalline cellulose is very similar to those of crystalline one. In case of ramie fibers non-crystalline parts exist in the both directions.
(3) Susceptibility of cellulose microfibril for enzyme :
Susceptibility of cellulose microfibril for enzyme depends on its morphology : Typical crystal of valonia also has some defects on its surface.
Cellulose microfibrils have their own morphology coming from their origin.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] Y.Saito,T.Okano,J.-L.Putaux,F.Gaill,H.Chanzy: "Criystallosolvates of beta chitin and alcohols" 7th ICCC,Advances in Chitin Science. vol.2. 507-512 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Samejima,J.Sugiyama K.Igarashi,and K.-E.L.Eriksson: "Enzymatic Hydrolysis of Bacterial Cellulose" Carbohydr.Res.305. 281-288 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Shibazaki,S.Kuga,M.Saito,T.Okano: "Native cellulose II production by Acetobacter xylinum under physical constraints" Cellulose. 5・3. 165-173 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Ishikawa,S.Kuga,T.Okano: "Determination of Parameters in Mechanical Model for Cellulose III fibre" Polymer. 39. 1875-1878 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sugiyama,J.,Boisset,C.,Hashimoto,M.,and Watanabe,T.: "Molecular directionality of α-chitin biosynthesis" J.Mol.Biol. 286. 247-255 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] E.Obataya,M.Norimoto,J.Gril: "The effects of adsorbed water on dynamic mechanical properties of wood" Polymer. 39. 3059-3064 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Saito, T.Okano, J-L.Putaux, F.Gaill, H.Chanzy: "Crystallosolvates of beta chitin and alcohols" 7th ICCC.Advances in Chitin Science. vol.2. 507-512 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Samejima, J.Sugiyama, K.Igarashi, and K-E : L.Eriksson: "Enzymatic Hydrolysis of Bacterial Cellulose" Carbohydr.Res.305. 281-288 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Shibazaki, S.Kuga, M.Saito, T.Okano: "Native cellulose II production by Acetob ter xylinum under physical constraints." Cellulose. 5.3. 165-173 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Ishikawa, S.Kuga, T.Okano: "Determination of Parameters in Mechanical Model for Cellulose III fiber" Polymer. 39. 1875-1878 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sugiyama, J,Boisset, C,Hashimoto, M,and Watanabe, T.: "Molecular direction ality of alpha-chitin biosynthesis" J.Mol.Biol. 286. 247-255 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] E.Obataya, M.Norimoto, J.Gril: "The effects of adsorbed Water on dynamic mechanical properties" Polymer. 39. 3059-3064 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Saito,T.Okano,J.-L.Putaux,F.Gaill,H.Chanzy: "Crystallosolvates of beta chitin and alcohols" 7th ICCC,Advances in Chitin Science. vol.2. 507-512 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Samejima,J.Sugiyama,K.Igarashi,and K.-E.L.Eriksson: "Enzymatic Hydrolysis of Bacterial Cellulose" Carbohydr.Res.305. 281-288 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] H.Shibazaki,S.Kuga,M.Saito,T.Okano: "Native cellulose II production by Acetobacter xylinum under physical constraints" Cellulose. 5・3. 165-173 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] A.Ishikawa,S.Kuga,T.Okano: "Determination of Parameters in Mechanical Model for Cellulose III fibre" Polymer. 39. 1875-1878 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Sugiyama,J.,Boisset,C.,Hashimoto,M.,and Watanabe,T.: "Molecular directionality of α-chitin biosynthesis" J.Mol.Biol.286. 247-255 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] E.Obataya,M.Norimoto,J.Gril: "The effects of adsorbed water on dynamic mechanical properties" Polymer. 39. 3059-3064 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] A.Ishikawa and T.Okano: "Fine structure and tensile properties of ramie fibres in the crystallineform of cellulose I,II,III,IV" Polymer. 38. 463-468 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Shibazaki, S.Kuga and T.Okano: "Mecerization and acid hydrolysis of bacterial cellulose" Cellulose. 4. 75-87 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] M.Koyama, W.Helbert, T.Imai, J.Sugiyama, and B.Henrissat: "arallel up structure evidences the molecular diretionality during biosynthesis of P bacterial cellulose" Proc.Natl.Acad.Sci.USA. 94. 9091-9095 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 小原光博、金山公三、中井朱美、永田和夫、奥山剛: "片振り曲げ疲労による木材はりの損傷" 木材学会誌. 43-11. 909-915 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Tejada, T.Okuyama, H.Yamamoto, M.Yoshida: "Reduction of growth stress in logs by direct heat treatment. Assessment of a commercial-scale operation." Forest Product Journal. 47-9. 86-93 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 鮫島正浩: "セルラーゼとセルロース生分解研究の新局面" 木材学会誌. 42. 811-816 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Ishikawa,T.Okano J.Sugiyama: "Fine structure and tensile properties of ramie fibers in the cryptalline form of cellulose I,II,III_I,IV_I" Polymer. 38-2. 463-468 (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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