2014 Fiscal Year Final Research Report
Development of dielectric spectroscopy for research at deep biosphere
| Project/Area Number |
25610163
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geochemistry/Cosmochemistry
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| Research Institution | Osaka University |
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Principal Investigator |
YAMANAKA Chihiro 大阪大学, 理学(系)研究科(研究院), 准教授 (10230509)
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| Research Collaborator |
YAMADA Kyouhei
SUZUKI Mayu
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | 地下生物圏 / 誘電分光法 / インピーダンス変化 / メタン菌 |
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| Outline of Final Research Achievements |
To clarify the ecosystem in deep biosphere, the dielectric spectroscopy was experimetally investigated as a cadidate probe using an anaerobic vacuum chamber and organic solution including archaeabacteria,Methanogen.The sample solution was recoverd from bio-rcycle facilities and cultivated in a bio-cell.The dielectric impedance spectroscopy at 100 kHZ- 30 MHz was performed continuously at different temperature 15, 35 and 55℃。Differential spectra substacted with spectrum for water solution with same conductivity showed possibly methanogen origin spectra at 200-600 kHz.The spectra showed siginificant variations at higher temperature. New sample-contact electrodes and cells were designed and a micro-flow cell was established.Additionally, thermal metamorphism of organic sediment (peat and asphaltum) bearing methanogen was investigated by ESR.
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| Free Research Field |
惑星地球科学 光・電磁場物性物理
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