Deamidation of Wheat-flour Gliadin with Ion-exchange Resin.

DOI Web Site 7 Citations 18 References
  • KUMAGAI Hitomi
    Department of Agricultural and Biological Chemistry, Nihon University
  • NORIMATSU Yuko
    Department of Agricultural and Biological Chemistry, Nihon University
  • HASHIZUME Naoko
    Department of Agricultural and Biological Chemistry, Nihon University
  • SAKURAI Hidetoshi
    Department of Agricultural and Biological Chemistry, Nihon University
  • KUMAGAI Hitoshi
    Department of Applied Biological Chemistry, The University of Tokyo

Bibliographic Information

Other Title
  • イオン交換樹脂による小麦粉グリアジンの脱アミド化
  • イオン コウカン ジュシ ニ ヨル コムギコ グリアジン ノ ダツアミドカ

Search this article

Abstract

Gliadin in wheat-flour gluten was deamidated by cation-exchange resins in order to enhance the affinity for water; four kinds of cation-exchange resins with functional groups of-N=(CH2COO-)2, -COO-and-SO3(Amberlite, IRC718, IRC50, IR120B, and XT1006) were used-The affinity of untreated and deamidated gliadins for water in the region of low water content were evaluated by water sorption measurement and thermodynamic analysis. In addition, the solubility of the samples to water and salt solutions was measured, as an index of affinity of the samples for water in the region of high water content. The gliadin of the largest amount of deamidation was obtained by using IRC 50 which was referred to as CE (COO-) in this paper, the cation-exchange resin with a functional group -COO- The degree of deamidation of the gliadins reached about 28% using CE (COO-) at the optimum conditions (amount: 0.2g/g-solution, treating time: 6hr). Water sorption isotherms of the gliadins were obtained; the amount of sorbed water on the deamidated gliadin was larger than that of the untreated one. The integral Gibbs free energy, ΔGs, on the basis of solution thermodynamics was calculated. The enhancement of the affinity for water by deamidation was quantitatively evaluated by ΔGs. The solubility of the deamidated gliadin to water and NaCl solution was higher than that of the untreated one.

Journal

Citations (7)*help

See more

References(18)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top