| Project/Area Number |
18360122
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Intelligent mechanics/Mechanical systems
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
MORISHIMA Keisuke Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Division of Bio-Applirations and Systems Engineering, Associate Professor (60359114)
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| Co-Investigator(Kenkyū-buntansha) |
FURUKAWA Yuji Tokyo University of Agriculture and Technology, Master of Technology Management, Professor (10087190)
YOSHIDA Makoto Tokyo Metropolitan University, Graduate School of Science and Engineering, Department of Mechanical Engineering, Assistant Professor (60336518)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥11,930,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2006: ¥10,500,000 (Direct Cost: ¥10,500,000)
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| Keywords | Fuel cell / DNA / Bacteria / Micromachine / Bioreactor |
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| Research Abstract |
In our laboratory, we have developed a mediator-less direct photosynthetic/metabolic bio-fuel cell (DPBFC) in which microparticles of polyaniline were adopted as the electrode material to extract electrons from bacteria In this paper, we selected Rhodopseudomonas palustris as a new fuel source which is activated by organic compounds and emits hydrogen. To improve the electron generation efficiency of R.palustris, gene manipulation was applied so as to suppress hydrogen emission and more electrons will be stored inside of R.palustris. As a result, the power density obtained by the mutant was 18.3μW/cm^2, which is higher than the wild type. In addition, to extend the cell life, it seems necessary to supply a medium to bacteria continuously, therefore, we have developed a medium flow system using water-absorbing polymer. The average flow rate was 32nl/min and the cell life for the mutant became 12 hours, that is six times longer than the previous DPBFC. In addition, we have prototyped a thin type flexible DPBFC by using a heat-sealing film and thermocompression process. As a result, the developed thin type flexible DPBFC(50×50×1mm) could generate the maximum power 64μW(4.65μW/cm2) when purple photosynthetic bacteria (Rhodopesudomonas palustris) was used as a fuel source.
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