| Project/Area Number |
23510064
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Risk sciences of radiation/Chemicals
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| Research Institution | Nagasaki University |
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Principal Investigator |
SHICHIJO Kazuko 長崎大学, 原爆後障害医療研究所, 助教 (90136656)
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| Co-Investigator(Kenkyū-buntansha) |
NAKASHIMA Masahiro 長崎大学, 原爆後障害医療研究所, 教授 (50284683)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKATSUJI Toshihiro 長崎大学, 環境科学部, 教授 (70163219)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2013: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2012: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2011: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
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| Keywords | 線量測定・評価 / 内部被曝 / 原爆被爆者 / 低線量放射線 / アルファ線 / プルトニウム / グリッドチェンバー検出器 / ゲノム不安定性 / グリッドチェンバー 検出器 |
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| Research Abstract |
In patients subjected to Atomic bomb there was no evidence of introduction of radioactive material. A much more palpable danger would exist from the ingestion or inhalation of radioactive material to increase cancer risks.
Here, we studied the preserved body cells of Nagasaki A-bombed victims in 1945, and became the first one to prove that plutonium (Pu) is continuing to emit radiations after more than 70 years in human body since the A-bomb attack.
Alpha particles emitted from the specimen such as lung, liver, bone etc. were detected by autoradiography. The frequency distribution of alpha-particle track lengths of A-bomb cases was consistent with the pattern of alpha-particles emitted from 239, 240Pu, different from that of controls. The internal radioactivity of A-bomb cases was higher than that of controls and relevant for factors of shielding and death time. Our achievement will pave the way to study 'internal A-bombed' and has contributed a lot to support the Hibakusya's insistence.
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