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Resonance effect of microwaves on the genome conformational state of E. coli cells.

Zeitschrift fur Naturforschung. C, Journal of biosciences · 1992 · Harm · Low evidence

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HarmLow evidencePaper 6289

Low-intensity millimeter-wave exposure showed resonance-like frequency dependence in the ranges 51.62–51.84 GHz and 41.25–41.50 GHz (resonance half-width ~100 MHz). Within 0.1–200 microW/cm2, a power density of 1 microW/cm2 was reported sufficient to suppress…

Study snapshot

PublicationZeitschrift fur Naturforschung. C, Journal of biosciences · 1992
Study typein_vitro
Reported directionHarm
Evidence ratingLow

Abstract

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 half-width of the order of 100 MHz. The power dependence of the microwave effect within the range of 0.1-200 microW/cm2 has shown that a power density of 1 microW/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.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typein_vitro
Effect directionharm
PopulationX-irradiated E. coli cells
Sample sizeNot supplied
ExposuremmWave
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Low-intensity millimeter-wave exposure showed resonance-like frequency dependence in the ranges 51.62–51.84 GHz and 41.25–41.50 GHz (resonance half-width ~100 MHz). Within 0.1–200 microW/cm2, a power density of 1 microW/cm2 was reported sufficient to suppress radiation-induced repair of the genome conformational state; this suppression was reported reproducible and independent of whether cells were exposed to X-rays before or after millimeter waves.

Outcomes measured

  • Genome conformational state (viscosity anomalous time dependencies)
  • Radiation-induced repair of genome conformational state

Limitations

  • Exposure duration not reported in abstract
  • Specific microwave modulation/pulsing characteristics not reported
  • No sample size or replication details provided in abstract
  • Outcome is a biophysical proxy measure; broader biological relevance not described in abstract
View raw extracted JSON
{
  "study_type": "in_vitro",
  "exposure": {
    "band": "mmWave",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "X-irradiated E. coli cells",
  "sample_size": null,
  "outcomes": [
    "Genome conformational state (viscosity anomalous time dependencies)",
    "Radiation-induced repair of genome conformational state"
  ],
  "main_findings": "Low-intensity millimeter-wave exposure showed resonance-like frequency dependence in the ranges 51.62–51.84 GHz and 41.25–41.50 GHz (resonance half-width ~100 MHz). Within 0.1–200 microW/cm2, a power density of 1 microW/cm2 was reported sufficient to suppress radiation-induced repair of the genome conformational state; this suppression was reported reproducible and independent of whether cells were exposed to X-rays before or after millimeter waves.",
  "effect_direction": "harm",
  "limitations": [
    "Exposure duration not reported in abstract",
    "Specific microwave modulation/pulsing characteristics not reported",
    "No sample size or replication details provided in abstract",
    "Outcome is a biophysical proxy measure; broader biological relevance not described in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "millimeter waves",
    "microwaves",
    "resonance",
    "E. coli",
    "genome conformation",
    "DNA repair",
    "X-irradiation",
    "power density",
    "51.62–51.84 GHz",
    "41.25–41.50 GHz"
  ],
  "suggested_hubs": [
    {
      "slug": "5g-policy",
      "weight": 0.2,
      "reason": "Study involves millimeter-wave frequencies (41–52 GHz), which overlap with some 5G FR2 bands, though this is an in vitro bacterial study rather than policy-focused."
    }
  ]
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1515/znc-1992-7-822
PubMed: 1388519

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