PMID: 7010816Jan 1, 1981Paper

Rotation of cells in an alternating electric field: the occurrence of a resonance frequency

Zeitschrift Für Naturforschung. Section C: Biosciences
U ZimmermannG Pilwat

Abstract

Cells suspended in a low-conducting medium were exposed to an alternating electric field whose frequency was altered between 1 kHz and 2 MHz. A resonance frequency was observed at which all suspended cells rotated about an axis normal to the field lines (when the electric field strength was larger than a threshold value of about 400 V/cm). This resonance frequency varied from species to species of cells (mesophyll protoplasts of Avena sativa = 20-40 kHz, human erythrocytes and ghost cells = 80-100 kHz, yeast cells = 140-180 kHz, Friend cells = 30-40 kHz, at room temperature). The resonance frequency of cell rotation was observed only under specific experimental conditions which excluded interference by reversible electrical breakdown of cell membranes and by gravitational forces. Glutardialdehyde fixed and heated cells exhibited no rotation in the frequency and field range investigated. The phenomenon of rotation is discussed in terms of dipole orientation within the membrane.

Citations

May 11, 2013·Annals of the New York Academy of Sciences·Angela M DaviesYoram Palti
Jun 1, 1982·Die Naturwissenschaften·W M Arnold, U Zimmermann
Jan 1, 1982·The Journal of Membrane Biology·C HolzapfelU Zimmermann
Jan 1, 1986·Biosensors·I Karube, M Suzuki
Nov 30, 1982·Biochimica Et Biophysica Acta·U Zimmermann

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