The transfer of stable ^<133>Cs from rice to Japanese sake(BREWING AND FOOD TECHNOLOGY)
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概要
- 論文の詳細を見る
Possible contamination by radioactive cesium (Cs), released by the Fukushima Daiichi Nuclear Plant Accident in Japan on March 2011, has been a matter of concern with respect to Japanese sake made from rice grains cultivated in affected fields. In this study, the behavior of stable ^<133>Cs, which is a useful analogue for predicting the behavior of radioactive Cs, was investigated in the production of sake using rice grains harvested in Japan in 2010. The concentration of stable ^<133>Cs in the polished rice grains decreased gradually with decreasing milling ratios until a ratio of 70% was reached, and below that point, it did not change significantly. The ^<133>Cs concentration in the 70% polished rice was approximately 20% of that found in brown rice. The sake was brewed on a small scale using 70% polished rice, and the transfer of ^<133>Cs from rice to sake was examined. Approximately 30-40% of ^<133>Cs in the 70% polished rice was removed during the washing and the steeping of the rice grains, and approximately 40% of the ^<133>Cs in the 70% polished rice was transferred to the sake. If the radioactive Cs species behaves similarly, these results suggest that brown rice containing 100 Bq/kg radioactivity of Cs would generate 70% polished rice grains containing 20 Bq/kg and that the sake brewed from these grains would contain 3-5 Bq/kg.
- 2012-12-00
著者
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Goto-yamamoto Nami
National Res. Inst. Of Brewing
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SHIMOI Hitoshi
National Research Institute of Brewing
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Okuda Masaki
National Res. Inst. Brewing Higashihiroshima Jpn
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YAMAOKA Hiroshi
National Laboratory for High Energy Physics (KEK)
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Yamaoka Hiroshi
National Research Institute Of Brewing
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Tokuoka Masafumi
National Research Institute Of Brewing
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HASHIGUCHI Tomokazu
National Research Institute of Brewing
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Joyo Midori
National Research Institute of Brewing
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