The effect of low intensity microwaves on the conformational state of the genome of X-irradiated E. coli cells was studied by the method of viscosity anomalous time dependencies. It has been established that within the ranges of 51.62-51.84 GHz and 41.25-41.50 GHz the frequency dependence of the observed effect has a resonance nature with a resonance halfwidth of the order of 100 MHz. The power dependence of the microwave effect within the range of 0.1-200 (μW/cm2 has shown that a power density of 1 μW/cm2 is sufficient to suppress radiation-induced repair of the genome conformational state. The effect of microwave suppression of repair is well reproduced and does not depend on the sequence of cell exposure to X-rays and microwave radiation in the millimeter band. The results obtained indicate the role of the cell genome in the resonant interaction of cells with low intensity millimeter waves.
The method of anomalous viscosity time dependence (AVTD) was used to study the influence of millimeter electromagnetic radiation (EMR) on the genome conformational state (GCS) of Escherichiu coli K12 cells. Strain N99 of wild-type, lysogenic strains N99(A) and N99(A,Aimm434bio10) were used. In the 41.28-41.37 GHz and 51.73-51.79 GHz ranges the resonance effect of low-intensity EMR (10-lo W/cm2) on the GCS of N99 cells was shown. The resonance frequencies were 41.324 f 0.001 GHz and 5 1.765 k 0.002 GHz, respectively. The insertion in bacterial chromosome of prophage A [strain N99(A)] and prophage Ximm43'bio10 [strain N99(A, Ximm43'4bio10)] reduced both resonance frequencies considerably. The decrease of both resonance frequencies was proportionate to the increase of the haploid genome length. Shifts of the resonance frequency were not accompanied by change in the sign of effective circular EMR polarization. The results indicate that the frequencies of resonance interaction of E. coli cells with low-intensity millimeter waves are determined by the genome structure. A physical model was suggested to describe the observed shift of the resonance frequency.
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