1991 Fiscal Year Final Research Report Summary
Excitatory Phenomena in Artificial Membranes Consisting of Surfactant
| Project/Area Number |
01420018
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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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 Professor of Department of Applied Physics, 理学部, 教授 (10016040)
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| Project Period (FY) |
1989 – 1991
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| Keywords | Surfactant / Artificial Membrane / Membrane Excitation / Micelle / Electrical Oscillation |
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| Research Abstract |
he objects of the research are divided into the following two kinds of systems.
1. Porous filters impregnated with surfactants
An excitatory potential generated in response to stimulation by a current pulse has been examined on an artificial membrane composed of a Nuclepore filter which was impregnated with sorbitan monooleate and set between aqueous solutions of KC1 with different concentrations. The excitatory potential response of rectangular shape was found to occur above a threshold value of the pulse height for current stimulation and it discretely increased with rising current stimulation.
2. Interface between oil and an aqueous solution of surfactant
Oscillatory behaviors in response to current-clamp and voltage-clamp stimulation were examined on a water/oil/water system consisting of an aqueous solution of sodium oleate as surfactant, nitrobenzene and an aqueous solution of sodium chloride. A stable oscillation with a period of 10 min. was observed only when the strength of the stimulation lay within a specific range of values. Further, this potential oscillation was found to follow a turbulent flow of the aqueous solution of surfactant near the interface.
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