The effect of rice kernel microstructure on cooking behaviour: A combined µ-CT and MRI study

A. Mohoric, F.J. Vergeldt, E. Gerkema, G. van Dalen, L.R. van den Doel, L.J. van Vliet, H. van As, J.P.M. van Duynhoven

Research output: Contribution to journalArticleAcademicpeer-review

34 Citations (Scopus)

Abstract

In order to establish the underlying structure-dependent principles of instant cooking rice, a detailed investigation was carried out on rice kernels that were processed in eight different manners. Milling, parboiling, wet-processing and extrusion were applied, with and without a subsequent puffing treatment. The mesostructure of the rice kernels was examined by DSC and XRD, and the microstructure by µ-CT. Hydration behaviour during cooking was studied by MRI in a real-time manner. Based on simple descriptive models, three different classes of cooking behaviour can be discerned. The water ingress profiles during cooking of these three classes matched well with simulations from a model that was based on water demand of the starch mass and the porous microstructure of the kernels. Thus a clear correlation between meso/microstructure of a rice kernel and the cooking behaviour has been established
Original languageEnglish
Pages (from-to)1491-1499
JournalFood Chemistry
Volume115
Issue number4
DOIs
Publication statusPublished - 2009

Keywords

  • magnetic-resonance
  • water migration
  • puffed rice
  • nmr
  • grain
  • gelatinization
  • starch
  • profile
  • flour
  • model

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