ポテトアミロペクチンのレオロジー特性

• 田幸 正邦

  Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus

書誌事項

タイトル別名

• Rheological Characteristics of Potato Amylopectin

抄録

The non-Newtonian behavior and dynamic viscoelasticity in aqueous solution of potato amylopectin were measured with a rheogoniometer, and the molecular origin for the rheological characteristics were discussed in comparison with those of rice amylopectin. The flow curves, at 25t, of potato amylopectin showed shear-thinning behavior at 2.0 and 4.0% concentration, but plastic behavior at 6.0%, the yield value of which was estimated to be 0.8 Pa. Although the dynamic viscoelasticity of rice amylopectin showed a constant value, it decreased in potato amylopectin solution when the temperature was increased. The tan s value was 1.15 at a concentration of 6.0% even at 0°C. The dynamic modulus decreased with the addition of urea (4.0 M) and in alkaline solution (0.05 N and 0.10 N NaOH) during an increase in the temperature. An increase of the dynamic modulus, however, was observed in 85% DMSO. A slight intramolecular association in potato amylopectin molecules seems to beinvolved in aqueous solution. The phosphate groups attached at C-6 seem to prevent intramolecular associations of potato amylopectin molecules in aqueous solution.

収録刊行物

• 応用糖質科学

  応用糖質科学 45 (4), 379-384, 1998

  日本応用糖質科学会

詳細情報

• CRID: 1390282680147088896
• NII論文ID: 10008258398
• NII書誌ID: AN10453916
• DOI: 10.11541/jag1994.45.379
• COI: 1:CAS:528:DyaK1MXos1yntA%3D%3D
• ISSN: 18844898
• ISSN: 13403494
• NDL書誌ID: 4635663
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010582333
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4635663
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  • CiNii Articles
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