Viscoelasticity of cowpea starch gels

So Yoon Won, WonSeok Choi, Hyesook S. Lim, Ki Yul Cho, Seung Taik Lim

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The mechanical behavior of cowpea starch gels (10%, w/v) at small and large deformations were investigated in comparison with acorn, corn, and potato starches in storage at 4°C for seven days. The rapid viscograms of starch paste (7%, w/v) revealed that cowpea starch had a larger setback (1,135 cP) than other starches (465-830 cP), although peak viscosity (1,723 cP) and pasting temperature (76°C) were between those of corn and potato starches. Texture profile analysis of cowpea starch gel showed exceptionally higher values for hardness, gumminess, chewiness and initial modulus than other starch gels. Cowpea starch gel also exhibited higher G' and smaller tan δ compared with other starch gels, regardless of the storage time. A creep test revealed that the cowpea starch gel could remain highly resistant to stress, showing the least deformation among the tested starch gels during storage up to seven days. The overall results disclosed that cowpea starch was capable of forming exceptionally strong and elastic gels with good storage stability.

Original languageEnglish
Pages (from-to)309-314
Number of pages6
JournalCereal Chemistry
Volume77
Issue number3
Publication statusPublished - 2000 May 1

ASJC Scopus subject areas

  • Food Science
  • Chemistry (miscellaneous)

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    Won, S. Y., Choi, W., Lim, H. S., Cho, K. Y., & Lim, S. T. (2000). Viscoelasticity of cowpea starch gels. Cereal Chemistry, 77(3), 309-314.