Study type: Medical/biological study (experimental study)

Evidence for dependence of resonant frequency of millimeter wave interaction with Escherischia coli K12 cells on haploid genome length med./bio.

By: Belyaev IY, Alipov YD, Polunin VA, Shcheglov VS
Published in: Electro Magnetobiol 1993; 12 (1): 39-49
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Aim of study (acc. to author)

The method of anomalous viscosity time dependence (AVTD) was used to study the influence of millimeter electromagnetic radiation on the genome conformational state (GCS) of E. coli cells with different lengths of the bacterial chromosme.

Background/further details

The length of the chromosme was changed by inserting DNA of phages. If DNA is the target of resonance interaction between millimeter waves and cells, the increase in length (mass) of chromosome DNA should decrease the resonance frequency.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 41.28–41.37 GHz
Exposure duration: 10 min
Exposure 2: 51.73–51.79 GHz
Exposure duration: 10 min

Exposure 1

Main characteristics
Frequency 41.28–41.37 GHz
Type
Exposure duration 10 min
Additional info resonance frequency 41,423 +- 0,001 GHz
Exposure setup
Exposure source
Chamber chamber shielded with metallic and carbon-containing material
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power density 1 µW/m² - - - -

Exposure 2

Main characteristics
Frequency 51.73–51.79 GHz
Type
Exposure duration 10 min
Additional info resonance frequency 51,765 +- 0,002 GHz
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power density 0.1 nW/cm² - - - -

Reference articles

  • Belyaev IY et al. (1992): Chromosome DNA as a target of resonant interaction between Escherichia coli cells and low-intensity millimeter waves
  • Belyaev IY et al. (1992): Existence of selection rules on helicity during discrete transitions of the genome conformational state of E. coli cells exposed to low-level millimetre radiation

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

In the 41.28-41.37 GHz and 51.73-51.79 GHz ranges the resonance effect of low-intensity electromagnetic radiation (EMR) on the genome conformational state of cells (N99) was shown. The insertion in bacterial chromosome of the two prophages reduced both resonance frequencies considerably. The decrease of both resonance frequencies was propotionate to the increase of the haploid genome length. Shifts of the resonance frequency were not accompanied by change in the sign of effective EMR polarization. The results indicate that the frequencies of resonance interaction with low-intensity millimeter waves are determined by the genome structure.

Study character:

Study funded by

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