Cooking Properties and Antioxidant Activity of Cooked Rice According to the Addition of Glutinous and Non-glutinous Sorghum
2013
Woo, K.S., RDA, Gyeongnam, Republic of Korea | Ko, J.Y., RDA, Gyeongnam, Republic of Korea | Kim, J.I., RDA, Gyeongnam, Republic of Korea | Lee, J.S., RDA, Gyeongnam, Republic of Korea | Song, S.B., RDA, Gyeongnam, Republic of Korea | Cho, J.M., RDA, Gyeongnam, Republic of Korea | Chung, T.W., RDA, Gyeongnam, Republic of Korea | Kim, K.Y., RDA, Gyeongnam, Republic of Korea | Oh, I.S., RDA, Gyeongnam, Republic of Korea
The purpose of this study was to evaluate the physicochemical characteristic of the cooked rice added with glutinous and non-glutinous sorghum. The sorghum cultivars were Sorghum bicolor L. Moench cv. Hwanggeumchal, Nampungchal (glutinous), and Donganme (nonglutinous), and rice cultivar was Ilpum rice. The cooking properties and pasting characteristics of cooking rice adding with sorghum according to varieties and different addition rates evaluated. The cooking properties and pasting characteristics had significant changes with the varieties and different addition rates of sorghum. With increased addition rates of sorghum, the pasting temperature, peak viscosity, trough viscosity, breakdown viscosity, and final viscosity were decreased. With increased addition rates of sorghum, the total polyphenol and flavonoid contents before and after cooked rice were increased. Total polyphenol contents of 30% addition rates before cooking rice with Hwanggeumchal, Nampungchal, and Donganme sorghum were 1,693.30, 1,890.98 and 2,386.11 μg/g sample, whereas those after cooking rice with sorghum were 1,189.28, 1,190.42 and 1,397.87 μg/g sample, respectively. The high level of DPPH radical scavenging activity before and after cooking rice with sorghum were 126.29 and 70.58 mg TE/100g sample in the Donganme in 30% addition rates. Also, ABTS radical scavenging activity was 135.56 and 83.12 mg TE/100g sample, respectively. The results of this study show that the addition of sorghum can make cooked rice improved antioxidant activity.
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