Reduction of Radioactive Cesium Content in Pond Smelt by Cooking

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  • わかさぎ中の放射性セシウムの調理による除去効果に関する検討
  • ワカサ ギ ナカ ノ ホウシャセイ セシウム ノ チョウリ ニ ヨル ジョキョ コウカ ニ カンスル ケントウ

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In Japan, seafood may be eaten raw or after having been cooked in diverse ways. Therefore, it is important to understand the effect of cooking on the extent of contamination with radioactive materials in order to avoid internal exposure to radioactive materials via seafood. In this study, we investigated the changes in radioactive cesium content in pond smelt cooked in four different ways: grilled, stewed (kanroni), fried and soaked (nanbanzuke). The radioactive cesium content in grilled, kanroni and fried pond smelt was almost unchanged compared with the uncooked state. In contrast, radioactive cesium content in nanbanzuke pond smelt was decreased by about 30%. Our result suggests that soaking cooked pond smelt in seasoning is an effective method of reducing the burden radioactive cesium.

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