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KMID : 1160620090140040362
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Preventive Nutrition and Food Science
2009 Volume.14 No. 4 p.362 ~ p.366
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Effect of Electron-beam Irradiation on Polymethoxylated Flavones Content of Citrus unshiu Pomaces
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Kim Jong-Wan
Kim Min-Chul
Nam Ki-Chang
Lee Seung-Cheol
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Abstract
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To determine the effect of electron-beam irradiation on the contents of polymethoxylated flavones (PMFs) extracts from citrus pomaces (CP), CP was irradiated at 0, 1, 2, or 5 kGy. Methanol extract of the irradiated CP were prepared and the PMF (nobiletin, sinensetin, and tangeretin) content of the extract was determined. Nobiletin and sinensetin of CP extract significantly increased with irradiation dose-dependent. However, electron-beam irradiation decreased the amount of tangeretin in the CP extract. These data suggest that irradiation can liberate phenolic compounds such as nobiletin or sinensetin, but tangeretin might have different pathway of conversion by irradiation. Therefore, irradiation can be a tool to change the composition of PMFs in CP.
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KEYWORD
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citrus pomaces, electron-beam irradiation, polymethoxylated flavones
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