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KMID : 0665220100230040600
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Korean Journal of Food and Nutrition
2010 Volume.23 No. 4 p.600 ~ p.606
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A Study on the Development of Cooked Rice according to the Different Coating Ratio of Yacon(Polymia sonchifolia) Root and Its Antioxidant and Sensory Properties
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Lee Ae-Rang
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Abstract
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The objective of this study was to develop functional rice coated with yacon roots extracts and to evaluate the antioxidant properties and physiological activity of rice coated with yacon extract. The washed rice was coated by spraying yacon extract at 10, 20, 30, and and dried at room temperature. The moisture contents, color changes, antioxidant properties as total polyphenolics and DPPH radical scavenging activity and instrumental texture property and sensory evaluation change in the yacon root extracts coated rice and uncoated cooked rice were observed during 3 days of storage. Increasing the coating concentration was associated with lower color values(L value) and moisture contents. Total phenolics and DPPH radical scavenging properties generally increased in the cooked rice coated with yacon root extract more than the control (non-coated rice). However, D-20( of the yacon root concentration) resulted in better textural properties and sensory overall acceptability in cooked rice on 0 and 3 storage days. It was concluded that the optimum coating ration of rice and added functional yacon rice were and 7% respectively, in proportion to the total weight of raw rice.
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KEYWORD
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yacon root, rice, functional food, texture, polyphenol, sensory test
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