To create materials that interact effectively with electromagnetic (EM) radiation, new nanosized substituted ferrites (NiZn)_1−xMn_xFe₂O₄ (x = 0, 0.5, and 1) anchored on the surface of multi-walled carbon nanotubes (CNTs) have been synthesized. The concentration of CNTs in the (NiZn)_1−xMn_xFe₂O₄/CNT system was from 0.05 to 0.07 vol. fractions. The dielectric and magnetic characteristics of both pristine (NiZn)_1−xMn_xFe₂O₄ ferrites and (NiZn)_1−xMn_xFe₂O₄/CNT composite systems were studied. The introduction of (NiZn)_1−xMn_xFe₂O₄/CNT composites into the amorphous epoxy matrix allows to tailor absorbing properties at the high-frequency by effectively shifting the maximum peak values of the absorption and reflection coefficient to a region of lower frequencies (20–30 GHz). The microwave adsorption properties of (NiZn)_1−xMnxFe₂O₄/0.07CNT–ER (x = 0.5) systems showed that the maximum absorption bandwidth with reflection loss below −10 dB is about 11 GHz.

Two mechanisms (bubble and resonance) of the interaction of low-intensity millimeter electromagnetic radiation and model cellular systems are investigated based on the example of Saccharomyces cerevisiae. It is shown that the effect of stimulating cell activity through electromagnetic radiation is of a pronounced resonance nature. The effect caused by the stimulation of vital activity in yeast cells under the influence of a thermal pulse, which can be described in terms of the bubble mechanism, is presented. The possibility of implementing both mechanisms is shown.