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Low frequency electric and magnetic fields have different effects on the cell surface.

M T Marron1, E M Goodman, P T Sharpe

  • 1Office of Naval Research, Arlington, VA 22217.

FEBS Letters
|March 28, 1988
PubMed
Summary

Both electric and magnetic fields impact the cell surface of Physarum polycephalum. Electric fields increase negative charge, while magnetic fields decrease hydrophobicity, with additive effects observed.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Electromagnetism

Background:

  • Controversy exists regarding weak electromagnetic field (EMF) effects on biological organisms.
  • A key aspect of this debate involves distinguishing between electric and magnetic field influences on bioeffects.

Purpose of the Study:

  • To investigate the specific effects of 60 Hz electric and magnetic fields on the cell surface of Physarum polycephalum.
  • To determine if electric and magnetic fields induce distinct or overlapping changes in cell surface properties.

Main Methods:

  • Exposure of Physarum polycephalum to controlled 60 Hz electric fields.
  • Exposure of Physarum polycephalum to controlled 60 Hz magnetic fields.
  • Analysis of cell surface charge and hydrophobicity following field exposure.

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Main Results:

  • Exposure to electric fields significantly increased the negative charge on the cell surface.
  • Exposure to magnetic fields significantly decreased the hydrophobic character of the cell surface.
  • The observed effects of electric and magnetic fields were additive and independent of waveform.

Conclusions:

  • Both electric and magnetic fields demonstrably alter the cell surface characteristics of Physarum polycephalum.
  • The distinct effects suggest specific mechanisms of interaction for electric versus magnetic fields at the cellular level.
  • Findings contribute to resolving the controversy surrounding EMF bioeffects by clarifying field-specific impacts.