[Effects of 460 MHz microwave radiation on Drosophila embryos under raised temperature].

Radiatsionnaia biologiia, radioecologiia · 2002 · Mixed · Low evidence

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MixedLow evidencePaper 6389

Study snapshot

PublicationRadiatsionnaia biologiia, radioecologiia · 2002

Study typeanimal

Reported directionMixed

Evidence ratingLow

Abstract

Combined effect of 460-MHz microwave irradiation and increased (up to 40 degrees C) temperature on Drosophila embryos of definite age was studied. It was demonstrated that the effect of 5-min exposures to non-modulated microwaves with 6 W/kg SAR accompanied with heating is only a little stronger than at normal temperature (24.5 degrees C). Irradiation with pulse-modulated microwaves with pulse repetition rates of 6, 10, 16, and 22 p.p.s. with average SAR of 0.12 W/kg (pulsed SAR 3 W/kg) combined with increased temperature caused some changes in PID dependent on the pulse rate. At 6 and 22 p.p.s, the increase in PID was close to that observed at normal temperature while at 10 and 16 p.p.s. the microwave irradiation did not produce any noticeable effect on development of the Drosophilas.

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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 typeanimal

Effect directionmixed

PopulationDrosophila embryos (definite age)

Sample sizeNot supplied

ExposureRF · 460 MHz · 6 W/kg · 5 min

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

In Drosophila embryos, 5-min exposure to non-modulated 460 MHz microwaves at 6 W/kg SAR with heating had an effect only slightly stronger at increased temperature (up to 40°C) than at normal temperature (24.5°C). Pulse-modulated exposure (6, 10, 16, 22 p.p.s.) with average SAR 0.12 W/kg (pulsed SAR 3 W/kg) combined with increased temperature produced pulse-rate-dependent changes in PID: increases at 6 and 22 p.p.s. were close to those at normal temperature, while at 10 and 16 p.p.s. no noticeable developmental effect was observed.

Outcomes measured

PID (developmental index; as reported)
development of Drosophila embryos

Limitations

Sample size not reported in abstract
Outcome measure (PID) not defined in abstract
Details of exposure setup and temperature control not provided in abstract
Statistical methods/significance not reported in abstract

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "RF",
    "source": null,
    "frequency_mhz": 460,
    "sar_wkg": 6,
    "duration": "5 min"
  },
  "population": "Drosophila embryos (definite age)",
  "sample_size": null,
  "outcomes": [
    "PID (developmental index; as reported)",
    "development of Drosophila embryos"
  ],
  "main_findings": "In Drosophila embryos, 5-min exposure to non-modulated 460 MHz microwaves at 6 W/kg SAR with heating had an effect only slightly stronger at increased temperature (up to 40°C) than at normal temperature (24.5°C). Pulse-modulated exposure (6, 10, 16, 22 p.p.s.) with average SAR 0.12 W/kg (pulsed SAR 3 W/kg) combined with increased temperature produced pulse-rate-dependent changes in PID: increases at 6 and 22 p.p.s. were close to those at normal temperature, while at 10 and 16 p.p.s. no noticeable developmental effect was observed.",
  "effect_direction": "mixed",
  "limitations": [
    "Sample size not reported in abstract",
    "Outcome measure (PID) not defined in abstract",
    "Details of exposure setup and temperature control not provided in abstract",
    "Statistical methods/significance not reported in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "460 MHz",
    "microwave radiation",
    "RF exposure",
    "SAR",
    "pulse modulation",
    "temperature",
    "heating",
    "Drosophila embryos",
    "development",
    "PID"
  ],
  "suggested_hubs": []
}

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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: Not supplied
PubMed: 12004617

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