Effect of Storage Temperature on Cooking Behaviour of Rice

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Abstract

The differences in the properties of residual cooking water and the textural profile of cooked rice grain following storage at 4 C and 37 C were examined. The higher temperature storage led to greater water uptake, reduced pH and turbidity of residual cooking liquid. The solids content in the residual cooking water also significantly (p < 0.001) decreased following storage at 37 C compared to 4 C storage. Textural profile of the cooked rice grain also differed for rice grains under the two storage temperatures. Hardness increased(p < 0.01) and adhesiveness reduced (p < 0.01) following storage at 37 ?C compared to 4 ?C. Moreover, analysis of the hot-water soluble fraction suggested that storage at 37 C decreased the leaching of starch components, particularly amylose. The cooked rice grains were also visualized using scanning electron microscopy, and the cooked rice following storage at 4 C showed smoother surfaces than that of the cooked rice following storage at 37 C.
Original languageEnglish
Pages (from-to)491-497
Number of pages7
JournalFood Chemistry
Volume105
Issue number2
DOIs
Publication statusPublished - 2007

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