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An Overview of organically bound tritium experiments in plants following a short atmospheric HTO exposure

HTO短期放出に伴う植物中有機結合型トリチウム生成に関する実験のレビュー

Galeriu, D.*; Melintescu, A.*; Strack, S.*; 安藤 麻里子  ; Kim, S. B.*

Galeriu, D.*; Melintescu, A.*; Strack, S.*; Atarashi-Andoh, Mariko; Kim, S. B.*

トリチウムの大気から植物への移行と、その後の有機結合型トリチウム(OBT)の生成は、植物の種類や季節等さまざまな条件で変化する。本レビューでは、短期のトリチウム放出に関して、麦や稲,大豆を含む数多くの植物を用いた実験データをまとめ、トリチウム水(HTO)の放出が昼夜どちらであるかや、成長段階や放出時間の長さ等の条件が、可食部のOBT生成に与える影響を示した。これらの成果は、HTOの事故放出後の食用作物の汚染に関して最適なモデルを開発するための一つのステップとなる。

Tritium transfer from atmosphere to plants and the subsequent conversion into organically bound tritium (OBT) strongly depends on the plant characteristics, seasons, and meteorological conditions, which have a large variability. This review presents an overview of relevant experimental data for many plants including wheat, rice, and soybean during short-term exposure. Tritiated water (HTO) uptake by plants during the daytime or nighttime has an important role in further OBT synthesis. OBT formation in crops depends on the development stage, length, and condition of exposure. OBT translocation to the edible plant parts differs between the crops analysed. The present study is a preliminary step for the development of a robust model of crop contamination after an HTO accidental release.

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パーセンタイル:70.81

分野:Environmental Sciences

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