[Reversibility of the effect of the change in time of the magnetic field on molluscan neurons].

Influence of a single impulse of magnetic field (MF) of trapezoidal shape with 10 Oe amplitude on neuron electrical activity (EA) of Lymnaea stagnalis was studied. It has been found that both leading and trailing edges of MF impulse separately were able to change EA of the cells. Nevertheless the impulses with a short time between the edges were found to be of small efficiency.

[Spectrophotometric study of the system DNA-lipid].

The effect of some physical and chemical factors on the system DNA-lipid and its components was studied by spectrophotometry. A change of optical density (D) of watersalt suspensions of lipid total fraction in the range of wavelengths from 200 to 350 nm with the change of ionic strength from 0 to 1 M NaC1 and temperature from 20 to 100 degrees C was investigated. Measurements were carried out under various temperature regemes.