Structure analysis of polysaccharide mixed gels by synchrotron-radiation circular dichroism spectroscopy and X-ray scattering techniques

• Project/Area Number: 25870111
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Polymer/Textile materials; Food science
• Research Institution: Gunma University
• Principal Investigator: YASUYUKI Maki 群馬大学, 大学院理工学府, 助教 (50400776)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 多糖類 / 複合ゲル / 食品 / 放射光

Outline of Final Research Achievements

Polysaccharide mixed gels, which are widely used in food industries, were investigated by use of synchrotron-radiation vacuum-ultraviolet circular dichroism (VUVCD) and small-angle synchrotron X-ray scattering (SAXS). The network structure of a typical polysaccharide mixed gel was clarified from the conformation of each polysaccharide chain determined by using VUVCD and junction-zone structure analyzed by using SAXS. The VUVCD technique was also effective in measuring microscopic molecular rheology in mixed gels.

Research Products

• [Journal Article] Correlation between rheological properties and turbidity of mixed gels of gelatin and agar (2015)
  • Author(s): Yasuyuki Maki, Kazushi Toriba, Yoshiharu Toyama, Toshiaki Dobashi
  • Journal Title: Journal of Biorheology Volume: 印刷中
  • NAID: 130005100425
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Effect of Molecular Weight on Synergy in Mixed Gels of κ-Carrageenan and Locust Bean Gum Studied by Vacuum Ultraviolet Circular Dichroism (2015)
  • Author(s): Yasuyuki Maki, Kazushi Toriba, Kazuya Ishizaka, Hiroyuki Yoshida, Sho Yasuraoka, and Koichi Matsuo
  • Journal Title: HiSOR Activity Report 2014 Volume: 印刷中
  • Acknowledgement Compliant
• [Journal Article] κ-カラギーナンとローカストビーンガムのX線小角散乱に対する混合の効果 (2015)
  • Author(s): 槇 靖幸, 鳥羽一史, 吉田啓恭, 安羅岡 翔, 土橋敏明
  • Journal Title: Photon Factory Activity Report 2014 Volume: 印刷中
  • Acknowledgement Compliant
• [Journal Article] Synergistic effect in mixed gels of polysaccharides studied by vacuum ultraviolet circular dichroism (2014)
  • Author(s): Yasuyuki Maki, Sho Yasuraoka, Kazushi Toriba, Koichi Matsuo
  • Journal Title: HiSOR Activity Report 2013 Volume: 印刷中
• [Journal Article] (κ-カラギーナン＋ローカストビーンガム)混合ゲルのX線小角散乱 (2014)
  • Author(s): 槇靖幸, 安羅岡翔
  • Journal Title: Photon Factory Activity Report 2013 Volume: 印刷中
• [Presentation] ゼラチン・寒天混合ゲルのレオロジーにおけるpH依存性 (2014)
  • Author(s): 鳥羽一史、槇 靖幸、外山吉治、土橋敏明
  • Organizer: 第37回日本バイオレオロジー学会年会
  • Place of Presentation: 大宮ソニックシティビル（埼玉県さいたま市）
  • Year and Date: 2014-06-05 – 2014-06-06
• [Presentation] ゼラチン・寒天混合系のゲル化のレオロジー (2014)
  • Author(s): 鳥羽一史、槇 靖幸、外山吉治、土橋敏明、松尾光一
  • Organizer: 第37回日本バイオレオロジー学会年会
  • Place of Presentation: 大宮ソニックシティビル（埼玉県さいたま市）
  • Year and Date: 2014-06-05 – 2014-06-06
• [Presentation] Gelation of Food Macromolecules Studied by Vacuum-Ultraviolet Circular Dichroism (VUVCD) (2014)
  • Author(s): Yasuyuki Maki
  • Organizer: Hiroshima International Workshop on Circular Dichroism Spectroscopy
  • Place of Presentation: Hiroshima Synchrotron Radiation Center (Higashi-hirosima)
  • Invited
• [Presentation] κ-カラギーナンとローカストビーンガムの混合系ゲルの構造解析 (2014)
  • Author(s): 安羅岡翔, 槇靖幸
  • Organizer: 物構研サイエンスフェスタ2013
  • Place of Presentation: つくば国際会議場エポカル（茨城県つくば市）
• [Remarks] 高分子物理化学研究室ホームページ
  • URL: http://biorheo.chem-bio.st.gunma-u.ac.jp/maki/index.html
• [Remarks] 高分子物理化学研究室ホームページ
  • URL: http://biorheo.chem-bio.st.gunma-u.ac.jp/maki/index.html