[The effects of the microwaves on E. coli cells depend on oxygen concentration and static magnetic field].

Radiatsionnaia biologiia, radioecologiia · 2006 · Mixed · Low evidence

← Research stream

MixedLow evidencePaper 3512

Study snapshot

PublicationRadiatsionnaia biologiia, radioecologiia · 2006

Study typein_vitro

Reported directionMixed

Evidence ratingLow

Abstract

The effects of non-thermal microwaves (MW), 10(-4) and 10(-10) W/cm(2), on conformation of nucleoids in E. coli cells were analyzed by the method of anomalous viscosity time dependence (AVTD). MW exposure was performed at different values of static magnetic field and concentration of oxygen, 8-90 microT, and 2.3-7.8 mg/l, respectively. It was shown, that slight changes in both static magnetic field and oxygen concentration result in significant changes of MW effects up to their disappearance. It was established, that changes in static magnetic field affected significantly the time kinetics of the MW effects. The obtained data provide further evidence for strong dependence of the effects of non-thermal microwaves on physical parameters of exposure and physiological factors. These dependences should be taken into account in replication studies. The obtained results encourage further investigation of possible modulation of non-thermal MW effects by additional electromagnetic fields.

Machine Enhanced Logic

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 directionmixed

PopulationE. coli cells

Sample sizeNot supplied

Exposuremicrowave

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Non-thermal microwave exposure at 10^-4 and 10^-10 W/cm^2 affected nucleoid conformation in E. coli, and the observed effects depended strongly on oxygen concentration (2.3–7.8 mg/L) and static magnetic field (8–90 microT). Small changes in oxygen concentration and/or static magnetic field produced significant changes in microwave effects, including disappearance of effects; static magnetic field changes also altered the time kinetics of the effects.

Outcomes measured

Conformation of nucleoids (assessed by anomalous viscosity time dependence, AVTD)
Time kinetics of microwave effects

Limitations

Microwave frequency not reported in the abstract
Exposure duration not reported in the abstract
Sample size not reported in the abstract
In vitro bacterial model; relevance to human health not addressed in the abstract

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "microwave",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "E. coli cells",
  "sample_size": null,
  "outcomes": [
    "Conformation of nucleoids (assessed by anomalous viscosity time dependence, AVTD)",
    "Time kinetics of microwave effects"
  ],
  "main_findings": "Non-thermal microwave exposure at 10^-4 and 10^-10 W/cm^2 affected nucleoid conformation in E. coli, and the observed effects depended strongly on oxygen concentration (2.3–7.8 mg/L) and static magnetic field (8–90 microT). Small changes in oxygen concentration and/or static magnetic field produced significant changes in microwave effects, including disappearance of effects; static magnetic field changes also altered the time kinetics of the effects.",
  "effect_direction": "mixed",
  "limitations": [
    "Microwave frequency not reported in the abstract",
    "Exposure duration not reported in the abstract",
    "Sample size not reported in the abstract",
    "In vitro bacterial model; relevance to human health not addressed in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "non-thermal microwaves",
    "E. coli",
    "nucleoid conformation",
    "oxygen concentration",
    "static magnetic field",
    "modulation",
    "AVTD"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.2,
      "reason": "Addresses non-thermal microwave effects and modulation by additional fields, relevant to exposure/health guideline discussions."
    }
  ]
}

AI can be wrong. Always verify against the paper.

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: Not supplied
PubMed: 17323702

Read the original paper →

Related papers

← Back to the Research Library