Comparative Investigations on the Inhibition of Mobile Phone Radiation by Multiple Compartment Cavity Resonance Devices

2019 · Harm · Low evidence

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HarmLow evidencePaper 1675

Study snapshot

Publicationmanual · 2019

Study typein_vitro

Reported directionHarm

Evidence ratingLow

Abstract

Comparative Investigations on the Inhibition of Mobile Phone Radiation by Multiple Compartment Cavity Resonance Devices Dartsch PC, König FM.Comparative Investigations on the Inhibition of Mobile Phone Radiation by Multiple Compartment Cavity Resonance Devices. Japan Journal of Medicine. 2019: 2:3. Abstract Mobile phone modulation technologies like LTE, UMTS and GSM are now fully established. Among these, mobile phones have been considered to emit only a radiation with low intensities when they are actively working and are placed near to the head. However, the safety aspects are not cleared evaluated. To address this topic, we have already investigated the cellular effects of DECT base radiation and its compensation by multiple compartment cavity resonance devices (RD). Prompted by this background, this study compares the efficacy of a second-generation RD with an optimized design in comparison to the first-generation RD used in previous studies. Connective tissue fibroblasts (cell line L-929) were exposed to the radiation of an actively transmitting commercially available mobile phone with 1.25 W/m2 at the level of the cells with and without the two different RD directed crosswise towards the cell layer during mobile phone irradiation. Unexposed cells in a similar incubator served as corresponding controls. The resulting cell vitality was checked by measurement of the enzymatic activity of mitochondrial dehydrogenases by the color change of the sodium salt 2,3-bis[2-methoxy-4- nitro-5-sulfo-pheny]-2H-tetrazolium-5-carboxyanilide (XTT). The results clearly demonstrate that exposure to mobile phone radiation caused a significantly reduced cell vitality by more than 50 % for non-thermal radiation with an intensity of 1.25 W/m2 at the level of the cells. The decreased cell vitality after mobile phone radiation exposure could be largely compensated by use of two crossed RD directed towards the cells. However, the newly designed RD construction was even more effective (reduction of cell vitality by 13.01 ± 1.86 %; mean value ± standard deviation) than the standard RD (reduction of cell vitality by 20.17 ± 2.16 %; mean value ± standard deviation) which has been already used successfully to compensate digitally enhanced cordless telecommunication (DECT) phone base station radiation. Open access paper: japanjournalofmedicine.com mobile-phone-radiation-by-multiple-compartment-cavity-resonance-devices/

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 directionharm

PopulationConnective tissue fibroblasts (cell line L-929)

Sample sizeNot supplied

ExposureRF

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Exposure of L-929 fibroblasts to radiation from an actively transmitting commercially available mobile phone at 1.25 W/m2 (described as non-thermal) significantly reduced cell vitality by more than 50% versus unexposed controls. Use of two crossed multiple compartment cavity resonance devices (RD) directed toward the cells largely compensated the reduction in vitality, with the second-generation RD reported as more effective (13.01 ± 1.86% reduction) than the first-generation/standard RD (20.17 ± 2.16% reduction).

Outcomes measured

Cell vitality (mitochondrial dehydrogenase activity via XTT assay)

Limitations

Frequency and modulation parameters of the mobile phone exposure were not reported in the abstract.
Exposure duration was not reported in the abstract.
Sample size/number of replicates and statistical details are not provided in the abstract.
In vitro cell-line findings may not generalize to human health outcomes.

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Connective tissue fibroblasts (cell line L-929)",
  "sample_size": null,
  "outcomes": [
    "Cell vitality (mitochondrial dehydrogenase activity via XTT assay)"
  ],
  "main_findings": "Exposure of L-929 fibroblasts to radiation from an actively transmitting commercially available mobile phone at 1.25 W/m2 (described as non-thermal) significantly reduced cell vitality by more than 50% versus unexposed controls. Use of two crossed multiple compartment cavity resonance devices (RD) directed toward the cells largely compensated the reduction in vitality, with the second-generation RD reported as more effective (13.01 ± 1.86% reduction) than the first-generation/standard RD (20.17 ± 2.16% reduction).",
  "effect_direction": "harm",
  "limitations": [
    "Frequency and modulation parameters of the mobile phone exposure were not reported in the abstract.",
    "Exposure duration was not reported in the abstract.",
    "Sample size/number of replicates and statistical details are not provided in the abstract.",
    "In vitro cell-line findings may not generalize to human health outcomes."
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "mobile phone radiation",
    "LTE",
    "UMTS",
    "GSM",
    "RF exposure",
    "non-thermal",
    "cavity resonance device",
    "radiation inhibition",
    "L-929",
    "fibroblasts",
    "XTT assay",
    "cell vitality",
    "DECT"
  ],
  "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: Not supplied

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