Influence of combined magnetic fields tuned to the calcium ion-cyclotron resonance on the intensity of planarian fission

It is shown that treatment with combined constant (42 μT) and alternating magnetic field at 32 Hz (corresponding to the cyclotron frequency for Ca²⁺ ion) parallel thereto exerts influence on the intensity of planarian fission that depends on the amplitude of the alternating magnetic field. At the alternating component of 100 nT magnitude a stimulatory effect is noted, at 250 nT the number of planarians significantly decreases, while at 500 nT no magnetic field action is registered.