[Microwave radiation sources requiring periodic or sporadic hygienic control].

Abstract

Throughout 1972--1978 measurements of dissipated microwave radiation in the environment of about 600 microwave apparatus of various types were taken. In the environment of the apparatus dissipated microwave radiation was found of values of the safety, dangerous, warning and intermediate zones, respectively. In the hitherto taken measurements many microwave devices have been observed, in whose environment no dissipated microwave radiation but low values in the safety zone have been found. These are e.g. such devices as sets of microwave laboratory systems of a very low power, microwave block in EPR spectrometers and NEC radio link transmitters. Our investigations indicate that for those devices sporadic hygienic control of electromagnetic field would be sufficient. Different types of microwave sources categorized into two groups according to the values of power density of dissipated microwave radiation near those sources have been presented.

AI evidence extraction

Main findings

From 1972–1978, dissipated microwave radiation was measured around about 600 microwave devices; measured values fell into safety, dangerous, warning, and intermediate zones. Many devices showed no dissipated microwave radiation or only low values in the safety zone (examples given include low-power laboratory microwave systems, microwave blocks in EPR spectrometers, and NEC radio link transmitters), for which sporadic hygienic control was suggested.

Outcomes measured

• Measured dissipated microwave radiation/power density in the environment of microwave devices
• Classification of measured levels into safety/dangerous/warning/intermediate zones
• Recommendation on periodic vs sporadic hygienic control based on measured levels

Limitations

• No frequencies, measurement methods, or quantitative results are provided in the abstract.
• No health outcomes are assessed; the work focuses on environmental measurements and control recommendations.
• Device types and exposure conditions are only described generally.

Suggested hubs

• occupational-exposure (0.78)
  Measurements and hygienic control recommendations for microwave sources in their environment imply an occupational/industrial hygiene context.

{
    "study_type": "exposure_assessment",
    "exposure": {
        "band": "microwave",
        "source": "microwave apparatus (various types)",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": "1972–1978 (measurement period)"
    },
    "population": null,
    "sample_size": 600,
    "outcomes": [
        "Measured dissipated microwave radiation/power density in the environment of microwave devices",
        "Classification of measured levels into safety/dangerous/warning/intermediate zones",
        "Recommendation on periodic vs sporadic hygienic control based on measured levels"
    ],
    "main_findings": "From 1972–1978, dissipated microwave radiation was measured around about 600 microwave devices; measured values fell into safety, dangerous, warning, and intermediate zones. Many devices showed no dissipated microwave radiation or only low values in the safety zone (examples given include low-power laboratory microwave systems, microwave blocks in EPR spectrometers, and NEC radio link transmitters), for which sporadic hygienic control was suggested.",
    "effect_direction": "unclear",
    "limitations": [
        "No frequencies, measurement methods, or quantitative results are provided in the abstract.",
        "No health outcomes are assessed; the work focuses on environmental measurements and control recommendations.",
        "Device types and exposure conditions are only described generally."
    ],
    "evidence_strength": "insufficient",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwave radiation",
        "power density",
        "environmental measurements",
        "hygienic control",
        "occupational hygiene",
        "EPR spectrometers",
        "radio link transmitters"
    ],
    "suggested_hubs": [
        {
            "slug": "occupational-exposure",
            "weight": 0.7800000000000000266453525910037569701671600341796875,
            "reason": "Measurements and hygienic control recommendations for microwave sources in their environment imply an occupational/industrial hygiene context."
        }
    ]
}

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