| Project/Area Number |
03453091
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
有機工業化学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TAMURA Masamitsu The University of Tokyo, Faculty of Engineering, Professor, 工学部, 教授 (30114557)
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| Co-Investigator(Kenkyū-buntansha) |
AKUTSU Yoshiaki The University of Tokyo, Faculty of Engineering, Research Associate, 工学部, 助手 (30175814)
ARAI Mitsuru The University of Tokyo, Faculty of Engineering, Associate Professor, 工学部, 助教授 (30232028)
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| Project Period (FY) |
1991 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 1993: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1992: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1991: ¥4,000,000 (Direct Cost: ¥4,000,000)
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| Keywords | Gas-phase radical / Combustion smoke / ESR / Spin trap / 燃焼スモ-ク |
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| Research Abstract |
It is known that the gas-phase combustion smoke of combustibles produce oxygen-centered gas-phase radicals which are highly reactive and apparently long-live. And it is also reported that the radicals might be toxic for living body. In order to obtain basic information about the radicals, analyzes of production behavior, production mechanisms, reaction behavior and inhibitation mechanisms of the radicals have been carried out. And following results have been obtained.
1. Polymers which have oxygen in the molecular structure such as PMMA or PVA produce the radicals without supplying oxygen externally during thermal decomposition.
2. Production behavior of the radicals in gas-phase combustion smoke is similar to the production behavior of hydrocarbons whose carbon number is 3-4.
3. The radicals can cause oxidation of cysteine, suggesting malignant biological effects.
4. Hydrogen halides and hydrogen cyanate which come from combustion of materials containing halogen or nitrogen inhibit the production of the radicals in gas-phase combustion smoke.
5. Diphenylamine which is believed to be a radical scavenger might encourage the production of the radicals in benzene solution under certain condition.
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