[Study of the orientation of DNA molecules in an electrical field by anisotropy of electrical conductivity of their aqueous solution]. / Issledovanie orientatsii molekul DNK v élektricheskom pole po anizotropii élektroprovodnosti ikh vodnykh rastvorov.

Electro-conductive anisotropy of DNA solution caused by the molecular orientation in the external electric field was investigated. The dependence of a relative change of the conductivity of aqueous-salt DNA solution on the electric field in the amplitude range 0-700 V/cm and in the frequency range 100 Hz-10 kHz was studied. It was pointed out that the field thermal effect is an overcoming factor when the orientation of DNA molecules is investigated by field-free relaxation.

[Anisotropic electric conductivity of bacterial suspensions induced by external electric field]. / Anizotropnaia élektroprovodnost' bakterial'nykh suspenzii, navedennaia vneshnim élektricheskim polem.

The anisotropy of electrical conductivity of suspensions of such bacteria, as E. coli, Serratia marcescens, Pseudomonas fluorescens induced by a sinusoidal external electric field and relaxation of the anisotropy after switching off the field were investigated. On the basis of the experimental relationships the anisotropy of electrical polarizability and coefficient of rotational diffusion of the cells were evaluated. The anisotropy of electrical polarizability and coefficient of the rotational diffusion obtained are in a good agreement with the available data of other methods.