Zimmermann U, Vienken J, Pilwat G
Z Naturforsch C Biosci. 1981 Jan-Feb;36(1-2):173-7. doi: 10.1515/znc-1981-1-229.
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.
悬浮在低导电介质中的细胞被置于一个交变电场中，该电场的频率在1千赫至2兆赫之间变化。观察到一个共振频率，在该频率下，所有悬浮细胞都绕着与电场线垂直的轴旋转（当电场强度大于约400伏/厘米的阈值时）。这种共振频率因细胞种类而异（燕麦叶肉原生质体 = 20 - 40千赫，人类红细胞和血影细胞 = 80 - 100千赫，酵母细胞 = 140 - 180千赫，Friend细胞 = 30 - 40千赫，在室温下）。细胞旋转的共振频率仅在特定的实验条件下才能观察到，这些条件排除了细胞膜可逆电击穿和重力的干扰。戊二醛固定并加热的细胞在所研究的频率和场强范围内不表现出旋转。根据膜内偶极子取向对旋转现象进行了讨论。
