Reversible Thermal Transition of Soluble Branched Chains from Slightly Acid-treated Potato Starch

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概要

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• The reversible thermal transition of soluble branched starch chains prepared from slightly acid-treated potato starch granules (ATS) was investigated. Potato starch was immersed in 15% sulfuric acid to obtain ATS with a 1% hydrolysis rate. About half of the molecules of ATS, which spontaneously formed large aggregates with a mass of a few million daltons in aqueous solution, was fractionated and soluble branched starch chains with a relative molecular weight (M_r) of 8.91×10^4 were obtained. Structural analysis indicated that the soluble branched starch chains consisted of three unit chains with M_r 7,900 and 21 unit chains with M_r 2,700. DSC and FT-IR measurements showed that the soluble branched starch chains underwent a reversible thermal transition, which is considered to be a helix-coil transition, during heating and cooling, but a debranched sample and β-limit dextrins showed substantially different thermal behavior, indicating the contribution of the ordered structure of the branched chains.

• 社団法人日本農芸化学会の論文
• 2000-07-23

著者

• TAKAHASHI Koji

  Department of Pediatrics, Nihon Kokan Hospital

• Kondo Hiroshi

  Dept. Of Radiology Graduate School Of Medicine Gifu University

• Yokote Yoshiko

  Department Of Chemistry Faculty Of Science Josai University

• KONDO Hiroshi

  Department of Civil Engineering, School of Engineering

• Hattori M

  Department Of Applied Biological Science Faculty Of Agriculture Tokyo University Of Agriculture And

• KONDO Hiroshi

  Faculty of Human Arts and Sciences, University of Human Arts and Sciences

• Kondo H

  Faculty Of Human Arts And Sciences University Of Human Arts And Sciences

• Takahashi K

  Dep. Of Applied Biological Sci. Fac. Of Agriculture Tokyo Univ. Of Agriculture And Technol.

• Hattori Makoto

  Department Of Applied Biological Science Tokyo University Of Agriculture And Technology

• KUROIWA Hiroshi

  Department of Applied Biological Science, Faculty of Agriculture, Tokyo University

• Takahashi Koji

  Department Of Chemistry And Chemical Engineering Yamagata University

• Kondo Hiroshi

  Department Of Agricultural Chemistry College Of Agriculture And Veterinary Medicine Nihon University

• Hattori Makoto

  Department Of Applied Biological Science Faculty Of Agriculture Tokyo University Of Agriculture And

• Hattori Makoto

  Department Of Agricultural Chemistry The University Of Tokyo

• Takahashi Koji

  Department Of Aeronautics And Astronautics Kyushu University

• Kato Hiroki

  Department Of Radiology School Of Medicine Gifu University

• TAKAHASHI Koji

  Departent of Materials Science and Engineering,Faculty of Engineering,Yamagata University

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