| Project/Area Number |
61550039
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
応用物理学一般(含航海学)
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
KAWAKUBO Tatsuyuki Tokyo Institute of Technology, Faculty of Science, 理学部, 教授 (10016040)
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| Co-Investigator(Kenkyū-buntansha) |
TSUCHIYA Yoshimi Tokyo Institute of Technology, Faculty of Science, 理学部, 助手 (50134812)
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1987: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1986: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | Artificial membrane / Millipore filter / Self-sustained oscillation / Autocatalysis / Surfactant / ミセル / 膜の興奮 / 自励振動 / 非平衡相転移現象 |
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| Research Abstract |
The investigation performed under this Grant-in-Aid has been concerned with two subjects. The first one is on a self-sustained electrical oscillation in a Millipore filter impregnated with dioleyl phosphate. A change in its conductance at a threshold concentration of environmental salt solution was interpreted in terms of a change in adsorptive reaction rate on the surface which was derived from an autocatalytic reaction model. The model also accounted for a self-sustained oscillation which was observed when the salt concentration of one side of the membrane was higher than the threshold mentioned above and that of the other side lower. The second one is on a self-sustained electrical oscillation observed in a water/ oil/water system in which one of the water phases contains a surfactant. We have examined the surfactant concentration dependence of the oscillation and found that specific concentrations were needed for a stable oscillation to persist. The experimental result was interpreted by the diffusion of surfactant ions in water and their absoption into the oil by formation of inverted-micelles.
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