Effects of 2.6-4.0 GHz microwave radiation on E-coli B.

PAPER pubmed The Journal of microwave power 1977 In vitro study Effect: no_effect Evidence: Low

Read original paper → DOI: 10.1080/16070658.1977.11689040 PMID: 336894 Evidence Lab

Abstract

The effects of 2.6-4.0 GHz microwave radiation on living E. coli B bacteria were studied using measurement of the colony forming ability (CFA) of the cells and alterations in the molecular structure determined by comparing the infrared spectrum of irradiated and unirradiated cell cultures. At absorbed power levels of 20 mW in 1 ml of cellular suspensions (i.e., a specific absorption rate of 20 W/kg) for 10-12 hour exposures, no effects were observed on either the molecular structure or the CFA for this particular strain of E. coli.

AI evidence extraction

At a glance

Study type

In vitro study

Effect direction

no_effect

Population

E. coli B bacteria (cell cultures)

Sample size

—

Exposure

microwave · 20 W/kg · 10-12 hour exposures

Evidence strength

Low

Confidence: 78% · Peer-reviewed: yes

Main findings

E. coli B cultures exposed to 2.6–4.0 GHz microwave radiation at an absorbed power level of 20 mW in 1 ml suspension (SAR 20 W/kg) for 10–12 hours showed no observed effects on colony forming ability or on molecular structure as assessed by infrared spectra.

Outcomes measured

colony forming ability (CFA)
infrared spectrum changes / molecular structure alterations

Limitations

Sample size not reported in abstract.
Only one bacterial strain (E. coli B) studied.
Exposure conditions limited to SAR 20 W/kg and 10–12 hours; other intensities/durations not described.

View raw extracted JSON

{
    "study_type": "in_vitro",
    "exposure": {
        "band": "microwave",
        "source": null,
        "frequency_mhz": null,
        "sar_wkg": 20,
        "duration": "10-12 hour exposures"
    },
    "population": "E. coli B bacteria (cell cultures)",
    "sample_size": null,
    "outcomes": [
        "colony forming ability (CFA)",
        "infrared spectrum changes / molecular structure alterations"
    ],
    "main_findings": "E. coli B cultures exposed to 2.6–4.0 GHz microwave radiation at an absorbed power level of 20 mW in 1 ml suspension (SAR 20 W/kg) for 10–12 hours showed no observed effects on colony forming ability or on molecular structure as assessed by infrared spectra.",
    "effect_direction": "no_effect",
    "limitations": [
        "Sample size not reported in abstract.",
        "Only one bacterial strain (E. coli B) studied.",
        "Exposure conditions limited to SAR 20 W/kg and 10–12 hours; other intensities/durations not described."
    ],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwave radiation",
        "2.6-4.0 GHz",
        "E. coli B",
        "specific absorption rate",
        "SAR 20 W/kg",
        "colony forming ability",
        "infrared spectrum",
        "molecular structure"
    ],
    "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

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