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Quality Characteristics and Antioxidative Activities in Various Cultivars of Sweet Potato  

Song Jin (National institute of Crop Science, RDA)
Chung Mi-Nam (Rural Development Administration)
Kim Jung-Tae (National institute of Crop Science, RDA)
Chi Hee-Youn (National institute of Crop Science, RDA)
Son Jong-Rok (National institute of Crop Science, RDA)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.50, no.spc1, 2005 , pp. 141-146 More about this Journal
Abstract
The objective of this study was to determine the characterisics of quality and antioxidant with various sweet potato(SP) varieties. The differences of skin color between general and colored SP was not significant. The flesh color of steamed SP was the lower than flesh of raw SP, and especially steamed purple SP(5.24) was lower than flesh SP(22.0). In physical characteristics, the hardness of raw SP showed the low values and the springness, gumness and hardness among steamed SP varieties was not significant. The total phenol content(TPC) of purple, yellow-fleshed and general SP had 13.1, 6.22 and 3.02 mg/g, respectively. In DPPH, the purple-fleshed SP had the highest free radical scanvering. Also, shingunmi$(88.5\%)$, Saengmi$(80.9\%)$ and Shinchunmi$(78.9\%)$ show the high antioxidant activities. The redness of SP was positively correlated with TPC in raw and steamed. However, the yellowness of flesh SP was negatively correlated with DPPH.
Keywords
Sweet potato; characterisics of quality; Phenol; DPPH;
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