Biological effect of-Non-Ionizing radiations on Microorganism

1999 Fiscal Year Final Research Report Summary

• Project/Area Number: 10837009
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: 電磁場環境
• Research Institution: Osaka University
• Principal Investigator: SHIMIZU Kikuo Radioisotope Research Center, Osaka University, Research, Associate, ラジオアイソトープ総合センター, 助手 (20162696)
• Co-Investigator(Kenkyū-buntansha): YAMAMOTO Takayoshi Radioisotope Research Center, Osaka University, Professor, ラジオアイソトープ総合センター, 教授 (30029243)
• Project Period (FY): 1998 – 1999
• Keywords: Paramecium / magnefic fields / behavior / garifoxis

Research Abstract

Paramecium multimicronucleatum was used as a model cell to study the effects of 60 Hz magnetic fields on swimming behavior. When exposed to a vertical field of 0.6 T, the cells accumulated at the upper end of the cuvette. An analysis of the swimming behavior revealed that the exposure to the field increased the number of cells swimming upwards maximally at 1 min after onset of the exposure. This effect of the magnetic field was transient, disappearing within a few minutes during the exposure. It is suggested that the magnetic field may amplify to a large extent the negative gravitaxis of Paramecium. Effects of an induced electric field on the swimming behavior are also discussed.