Characteristics of some physically modified starches using mild heating and freeze-thawing

Chen Zhang, Jung Ah Han, Seung Taik Lim

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Granular starches of different origins (normal corn, waxy corn, potato and tapioca) dispersed in water (40% dry solids, w/v) were subjected to mild heating (1 h) at their onset temperatures (To) for melting (H), cooling (12 h at 4 °C) after the heat treatment (HC), and freeze-thawing (12 h at −20 °C and 1 h at 25 °C) after the heating and cooling (HCFT). Both mild heating and freeze-thawing induced the deformation of granule structure by releasing starch chains from granules, which could form outer layers on the surface of starch granules by drying the treated starches. The mild heating thus provided a stabilization effect against shear thinning during pasting. The HCFT-treated starches, especially, displayed the most significant changes in pasting viscosity with the greatest value of final viscosity. The gels prepared with the treated starches showed an enhanced rigidity with increased hardness and springiness.

Original languageEnglish
Pages (from-to)894-901
Number of pages8
JournalFood Hydrocolloids
Volume77
DOIs
Publication statusPublished - 2018 Apr

Keywords

  • Amylose leaching
  • Freeze-thawing
  • Gel texture
  • Pasting viscosity
  • Physical modification

ASJC Scopus subject areas

  • Food Science
  • Chemistry(all)
  • Chemical Engineering(all)

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