Comparison of 15O-Labeled and 18F-Labeled Water Uptake in a Soybean Plant by PETIS (Positron Emitting Tracer Imaging System).
Comparison of 15O-Labeled and 18F-Labeled Water Uptake in a Soybean Plant by PETIS (Positron Emitting Tracer Imaging System).
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通过 PETIS（正电子发射示踪成像系统）比较大豆植株中 15O 标记和 18F 标记的水吸收情况。
DOI：
10.3769/radioisotopes.50.265
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
民数 久米
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作者：
友子 中西;横田 はる美;田野井 慶太朗;純 古川;池上 奈通子;曜子 大國;博 内田;淳憲 辻;典子 石岡;智 渡辺;明彦 長;俊明 関根;信平 松橋;岳人 伊藤;民数 久米
采用PETIS（正电子发射示踪成像系统）比较了15o标记和18f标记大豆植株的吸水方式。15O标记水（半衰期：110 min）和18F标记水（半衰期：2 min）分别由14N (d, n) 15O和16O (α, pn) 18F反应在回旋加速器上产生。一棵大豆的根被切断，每一根标记的水都从植物的基部供应。样品发射的伽马射线用检测面积为5 cm × 15 cm的BGO计数器测量。每隔15s累积每根茎的放射性，直至20min。结果发现，18f标记的水被吸收的速度比15o标记的水快得多，这表明在18f标记的水中，氟以18f离子的形式移动。对植株供水5 min和10 min后的15o标记水进行BAS图像采集，发现标记水只出现在最低节间，根和第一片叶子之间。
15O-Labeled and 18F-labeled water uptake manner in a soybean plant was compared by PETIS (Positron Emitting Tracer Imaging System) . 15O-Labeled water (half-life: 110 min) and 18F-labeled water (half-life: 2 min) was produced by a cyclotron by 14N (d, n) 15O and 16O (α, pn) 18F reactions, respectively. A root of a soybean plant was cut off and each labeled water was supplied from the basal part of the plant. The gamma-rays emitted from the sample was measured by a BGO counter with a detection area of 5 cm × 15 cm. The radioactivity from each stem was accumulated every 15 s till 20 min. It was found that 18F-labeled water was taken up much faster than 15O-labeled water, suggesting that in 18F-labeled water, fluorine was moved in the form of 18F-ion. When BAS image of 15O-labeled water in a plant after 5 min and 10 min of water supply was taken, it was found that the labeled water was observed only in the lowest internode, between a root and the first leaves.