The membrane potential of Characean cells exposed to amplitude-modulated, low-power 147-MHz radiation

The membrane potential of isolated cells of Chara braunii or Nitella flexilis was monitored while the cells were exposed, at nominal power densities from 2 to 1,000 W/m2, to 147‐MHz radiation amplitude modulated at frequencies from 4 to 64 Hz. Phase‐sensitive detection was used to seek radiation‐correlated changes in the membrane potential, and none were apparent under any of the conditions used in this investigation.