| Project/Area Number |
10480130
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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 |
環境影響評価(含放射線生物学)
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
SHIMOOKA Toshiyuki Hokkaido Univ., Grad. Sch. Of Eng., Assoc. Prof., 大学院・工学研究科, 助教授 (50196549)
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| Co-Investigator(Kenkyū-buntansha) |
FUKUSHIMA Kikuro Hokkaido Univ., Sch. Of Medicine, Assoc. Professor, 医学部, 教授 (70091486)
KATO Yuji Hokkaido Univ., Grad. Sch. Of Eng., Assoc. Lecture, 大学院・工学研究科, 助手 (50261582)
SHIMIZU Koichi Hokkaido Univ., Grad. Sch. Of Eng., Assoc. Professor, 大学院・工学研究科, 教授 (30125322)
YAMASHITA Masaji Hokkaido Univ., Inst. Of Tech., Fac. Of Eng., Assoc. Prof., 工学部, 助教授 (40210421)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 1999: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1998: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | electric field / electromagnetic field / biological effect / exposure dose / quantitative analysis / safety / numerical analysis / exposure experiment |
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| Research Abstract |
The first aim of this study is to establish the methods for the analysis and the evaluation of the electric field exposure to a human body. The second aim is to clarify the biological effect of electric field quantitatively using biotelemetry techniques. This study included the development of numerical analysis techniques and measurement techniques, the measurement of exposure dose in a living human body and the search for the biological effects that can be evaluated quantitatively. Through this study, the following results were obtained.
1) We have developed a numerical analysis technique and a measurement technique of an electric field, which are applicable to a living human body. The distribution of the electric field and the induced current could be measured successfully over all parts of a human body.
2) Using the techniques developed in the study, the electric field and the induced current were measured in the human body when it was exposed to the electric field in the instrument of an electric field therapy.
3) We could obtain the distribution of the surface electric field and the induced current with a living human body. The results revealed the manners of the field concentration on specific parts of the body. It also revealed that the density of the induced current became high (hot spots) at some parts of the body.
4) Through the quantitative analysis of this study, a part of the mechanism of the field perception and the cause of the individual difference in the perception level were made clear.
5) As a physiological change caused by the electric field exposure, the phenomenon of blood flow change in a human body surface was newly discovered.
In conclusion, the most part of the purpose of this study was accomplished, and some significant new findings were obtained.
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