The Escherichia coli cells K12 AB1157 from the stationary stage of growth were exposed to millimeter waves (MMW) at power densities (PD) from 10
−8
W/cm
2
to 3 × 10
−3
W/cm
2
. Frequency dependencies ...during exposure within the range of 51.655-51.688 GHz were studied for two cell concentrations (4 × 10
7
and 4 × 10
8
cells/ml). The changes in the genome conformational state (GCS) were analyzed by the method of anomalous viscosity time dependence (AVTD). The resonant effect with the resonance frequency of 51.675 ± 0.001 GHz was observed in the PD range of 10
−18
-10
−8
W/cm
2
. Left-handed polarized MMW was shown to be more effective than right-handed circular polarization at this resonance. At PDs more than 10
−6
W/cm
2
the 51.675 GHz resonance effect decreased significantly. As the 51.675 GHz resonance decreased, a statistically significant effect was observed with its maximum at 51.668 ± 0.002 GHz. The results were compared to data of previous studies performed at the resonance frequency of 51.755 GHz. All resonance effects depended on the concentration of cells during exposure, which implies a cell-to-cell interaction during resonance response (cooperativity of resonance response). At all resonance frequencies, an effect was observed at very low nonthermal intensities: 10
−18
W/cm
2
for 51.755 GHz and 51.675 GHz; 10
−14
W/cm
2
for 51.668 GHz. The values of three resonance frequencies were stable in wide PD ranges within 10
−18
-10
−3
W/cm
2
. The half-widths of the resonances showed different dependencies on PD, changing from 2-3 MHz to 16-17 MHz (51.675 GHz, 51.668 GHz) or 100 MHz (51.755 GHz). The significant rearrangement in the spectrum of resonance response was observed in the 10
−8
-10
−4
W/cm
2
. All three resonances were involved in this rearrangement which can be explained in the framework of the model of electron-conformational interactions.
Shcheglov Yuri K., Tchimichkian Vardan. Aspects du mythe soviétique dans les romans de Veniamin Kaverin et principalement dans les Deux Capitaines. In: Revue des études slaves, tome 71, fascicule ...3-4, 1999. pp. 649-671.
Specularly smooth transparent layers of gallium nitride have been prepared of an area up to 2 x 3 cm2 and thickness up to 1 mm. Growth of GaN wafers was implemented by HVPE, to eliminate cracking of ...the layers the process was carried out in two stages; separation of the GaN layer from the substrate was achieved by low-temperature deposition of a buffer layer of optimum thickness. FWHM of the X-ray rocking curve in the best samples is *w*c = 3.5' and the dislocation density is 107-108 cm-2.
The effect of millimeter waves (MMWs) on the genome conformational state (GCS) of E. coli AB1157 cells was studied by the method of anomalous viscosity time dependencies (AVTD) in the frequency range ...of 51.64-51.85 GHz. The 51.755 GHz resonance frequency of the cell reaction to MMWs did not depend on power density (PD) in the range from 10(-19) to 3 x 10(-3) W/cm2. The half-width of the resonant reaction of cells showed a sigmoid dependence on PD, changing from 3 MHz to 100 MHz. The PD dependence of the half-width had the same shape for different concentrations of exposed cells (4 x 10(7) and 4 x 10(8) cells/ml), whereas the magnitude of the 51.755 GHz resonance effect differed significantly and depended on the PD of MMW exposure. Sharp narrowing of the 51.755 GHz resonance in the PD range from 10(-4) to 10(-7) W/cm2 was followed by an emergence of new resonance frequencies. The PD dependence of the MMW effect at one of these resonance frequencies (51.674 GHz) differed markedly from the corresponding dependence at the 51.755 GHz resonance, the power window occurring in the range from 10(-16) to 10(-8) W/cm2. The results obtained were explained in the framework of a model of electron-conformational interactions. The frequency-time parameters of this model appeared to be in good agreement with experimental data.
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