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[The hemathological reactions in rats after partial screening from natural electromagnetic fields].

Radiatsionnaia biologiia, radioecologiia · 2005 · Mixed · Low evidence

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MixedLow evidencePaper 5168

In rats placed inside copper rings intended to partially screen natural EMF, granulocyte numbers increased within 3–5 hours and returned to baseline by 24 hours; the effect was more pronounced with individual rings than with a common cage ring. Plastic-ring c…

Study snapshot

PublicationRadiatsionnaia biologiia, radioecologiia · 2005
Study typeanimal
Reported directionMixed
Evidence ratingLow

Abstract

The influence of partial screening of EMF on the composition of white blood cells was studied in the experiments on rats. Two kinds of copper rings were used in these experiments: individual for each rat and common for the cage. It was shown that inside the ring the composition of blood cells was changed--in 3-5 hours the number of granulocytes increased and in 24 hours it restored to the initial level. The effect was more expressive in the experiments using individual rings. In control groups the experiment with plastic rings didn't reveal this effect. It was presumed that EMF prevented the decay of granulocytes. It leads to the increase of their guantity. It was revealed that there was a positive correlation between Ki-indexes of geomagnetic field (GMF) in 1-2 days before the experiments and the number of granulocytes in rats during 1995-2002. Ki-indexes reflect the degree of GMF disturbance. During magnetic storms the spreading of EMF in radio-frequency range changes. It was presumed that the effect of partial screening of EMF of rats and the activity of magnetic storms are similar in their influence on the composition of white blood cells of rats.

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 typeanimal
Effect directionmixed
Populationrats
Sample sizeNot supplied
Exposure3–5 hours and 24 hours
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

In rats placed inside copper rings intended to partially screen natural EMF, granulocyte numbers increased within 3–5 hours and returned to baseline by 24 hours; the effect was more pronounced with individual rings than with a common cage ring. Plastic-ring controls did not show this effect. A positive correlation was reported between Ki-indexes of geomagnetic field disturbance 1–2 days before experiments and granulocyte numbers in rats (1995–2002).

Outcomes measured

  • white blood cell composition
  • granulocyte count
  • correlation with geomagnetic field (GMF) disturbance (Ki-index)

Limitations

  • Sample size not reported in abstract
  • Exposure characteristics (field strength, frequencies, degree of screening) not quantified
  • Mechanistic interpretation (EMF preventing granulocyte decay) is presented as a presumption
  • Correlation with Ki-index/geomagnetic disturbance is observational and may be confounded
View raw extracted JSON
{
  "study_type": "animal",
  "exposure": {
    "band": null,
    "source": "partial screening from natural electromagnetic fields using copper rings",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "3–5 hours and 24 hours"
  },
  "population": "rats",
  "sample_size": null,
  "outcomes": [
    "white blood cell composition",
    "granulocyte count",
    "correlation with geomagnetic field (GMF) disturbance (Ki-index)"
  ],
  "main_findings": "In rats placed inside copper rings intended to partially screen natural EMF, granulocyte numbers increased within 3–5 hours and returned to baseline by 24 hours; the effect was more pronounced with individual rings than with a common cage ring. Plastic-ring controls did not show this effect. A positive correlation was reported between Ki-indexes of geomagnetic field disturbance 1–2 days before experiments and granulocyte numbers in rats (1995–2002).",
  "effect_direction": "mixed",
  "limitations": [
    "Sample size not reported in abstract",
    "Exposure characteristics (field strength, frequencies, degree of screening) not quantified",
    "Mechanistic interpretation (EMF preventing granulocyte decay) is presented as a presumption",
    "Correlation with Ki-index/geomagnetic disturbance is observational and may be confounded"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "rats",
    "partial screening",
    "natural electromagnetic fields",
    "copper rings",
    "white blood cells",
    "granulocytes",
    "geomagnetic field",
    "Ki-index",
    "magnetic storms"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.2,
      "reason": "Mentions natural EMF/geomagnetic disturbances and radio-frequency range changes, potentially relevant to broader EMF exposure context."
    }
  ]
}
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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: 16080624

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