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http://dx.doi.org/10.3746/jkfn.2011.40.10.1378

Antioxidative Properties of Ethanolic Extracts from Flowering Cherry (Prunus serrulata L. var. spontanea Max. wils.) Fruit with Various Doses of Gamma Radiation  

Kim, Kyung-Hee (Dept. of Food and Nutrition, Chungnam National University)
Jo, Ji-Eun (Dept. of Food and Nutrition, Chungnam National University)
Lee, Seong-A (Dept. of Food and Nutrition, Chungnam National University)
Yook, Hong-Sun (Dept. of Food and Nutrition, Chungnam National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.40, no.10, 2011 , pp. 1378-1383 More about this Journal
Abstract
This study investigated the antioxidant activity of ethanolic extracts of 1~20 kGy-gamma irradiated flowering cherry fruit (Prunus serrulata L. var. spontanea Max. wils.). The total phenolic compound content was highest (30.35 mg/g) in the 10 kGy sample, but there was no consistent trend matching the increase or decrease of gamma irradiation. Radical scavenging activity using DPPH (2,2-diphenyl-1-picrylhydrazyl) showed that gamma-irradiated samples were better than non-irradiated samples and that the 10 kGy-gamma irradiated sample was the best ($IC_{50}$ 327.52 ppm). In reducing power, gamma-irradiated samples induced higher activities than non-irradiated samples at concentrations below 2.5 mg/mL, and the sample with the highest activity was the 20 kGy-gamma irradiated sample. In nitrite-scavenging ability, both gamma-irradiated and non-irradiated samples showed high activity (73~94%) at pH 1.2, 3.0, and 4.2. Also, the nitrite-scavenging ability of gamma-irradiated samples was significantly different from that of the control at pH 1.2. The FRAP value of the 3 kGy-irradiated sample also showed the highest value of 0.38 mM. Our results indicate that gamma irradiating the ethanolic extracts of flowering cherry fruit increases the antioxidant activity at some of the radiation doses. Therefore, it suggests that gamma irradiation could increase biological activity and be used effectively in food manufacturing and related industries.
Keywords
fruit of flowering cherry (Prunus serrulata L. var. spontanea Max. wils.); antioxidative properties; gamma irradiation;
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