Low frequency electric field induced changes in the shape and motility of amoebas

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Science  31 Jan 1975:
Vol. 187, Issue 4174, pp. 357-359
DOI: 10.1126/science.1111109


Perpendicular and parallel elongation of the giant amoeba, Chaos chaos (Chaos carolinensis), have been observed in alternating electric fields over a wide frequency range (from about 1 hertz to about 10 megahertz). The characteristics change as a function of frequency. Simple dielectric forces may be important in the production of these effects.