[Effect of weak and ultraweak static magnetic fields on the intensity of fission of the planarian Dugesia tigrina].

It has been shown that, in the range of 03000 nT, a biological system differently responds to the treatment with a weak static magnetic field. Thus, at a practically complete compensation of the field (induction 5 nT), the intensity of fission of planarian does not differ from control values. As the field intensity is successively increased to 300 nT, a marked and statistically significant stimulating effect is observed (SC 1.51.8), which disappears in the intensity range of 400 and 600 nT. At intensities from 800 to 1500 nT, the stimulating effect manifests itself again. Further increase of field intensity to 3000 nT leads to the disappearance of the effect.