| Project/Area Number |
07554068
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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 | 試験 |
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| Research Field |
植物生理
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| Research Institution | Tokyo University of Pharmacy and Life Science |
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Principal Investigator |
TSUZUKI Mikio Tokyo University of Parmacy and Life Science, School of Life Science, Professor, 生命科学部, 教授 (70155430)
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| Co-Investigator(Kenkyū-buntansha) |
TSUTSUMI Masahiko Toshiba Corporation, Researcher, 重電技術研究所, 研究員
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1996: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | carbon dioxide / microalgae / environment / chlorella / atomosphere |
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| Research Abstract |
There must be several problems to develop a CO_2 fixation system with microalgae against the increase in atmospheric CO_2 concentration : Water supply is one of the problems in some area such as a deseart where the large system can be placed. Some microalge such as Chlorella show a high photosynthetic activity even on a filter membrane. The photosynthetic characteristics was essentially the same as those obtained with the cells in liquid. The maximum rate of CO_2 fixation on the membrane reached 1.2g CO_2・h^<-1> per sequare meter of the exposed area. The ratio of the increase in dry weight over the fixed amount of CO_2 was 0.55 to 0.70 at various CO_2 concentrations. The value can be comparable to 0.68 which is obtained as the assumption of starch as a final product of CO_2 fixation. The photosynthetic activity decreased gradually to the half for 5 days. If the cells was kept wet by an occasional spray, the activity continued for more than 3 weeks. Most of the components which increased during the CO_2 fixation was starch and protein. When nitorogen content was lowered in the culture medium, the increase in protein was suppressed.
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