Extremely low frequency (ELF) stray magnetic fields of laboratory equipment: a possible co-exposure conducting experiments on cell cultures.

Electromagnetic biology and medicine · 2015 · Unclear · Insufficient evidence

← Research stream

UnclearInsufficient evidencePaper 4736

Measurements around a CO2 incubator, water bath, and shaker table found that the equipment can add considerable ELF magnetic fields to ambient background or to intentional exposures. Reported maximum stray magnetic fields exceeded 3 µT (incubator), 20 µT (wat…

Study snapshot

PublicationElectromagnetic biology and medicine · 2015

Study typeexposure_assessment

Reported directionUnclear

Evidence ratingInsufficient

Abstract

Measurements of extremely low frequency (ELF) magnetic fields were conducted in the environment of commercial laboratory equipment in order to evaluate the possible co-exposure during the experimental processes on cell cultures. Three types of device were evaluated: a cell culture CO2 incubator, a thermostatic water bath and a laboratory shaker table. These devices usually have electric motors, heating wires and electronic control systems, therefore may expose the cell cultures to undesirable ELF stray magnetic fields. Spatial distributions of magnetic field time domain signal waveform and frequency spectral analysis (FFT) were processed. Long- and short-term variation of stray magnetic field was also evaluated under normal use of investigated laboratory devices. The results show that the equipment under test may add a considerable ELF magnetic field to the ambient environmental magnetic field or to the intentional exposure to ELF, RF or other physical/chemical agents. The maximum stray magnetic fields were higher than 3 µT, 20 µT and 75 µT in the CO2 incubator, in water bath and on the laboratory shaker table, respectively, with high variation of spatial distribution and time domain. Our investigation emphasizes possible confounding factors conducting cell culture studies related to low-level ELF-EMF exposure due to the existing stray magnetic fields in the ambient environment of laboratory equipment.

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 typeexposure_assessment

Effect directionunclear

Populationcell cultures (experimental environment)

Sample sizeNot supplied

ExposureELF

Evidence strengthInsufficientConfidence: 78% · Peer reviewed: yes

Main findings

Outcomes measured

Measured stray ELF magnetic field levels around laboratory equipment
Spatial distribution and temporal variation of ELF magnetic fields
Frequency spectral characteristics (FFT) of magnetic field signals

Limitations

No sample size or number of devices/measurement locations specified in the abstract
No biological/health outcomes assessed; study focuses on exposure characterization and potential confounding in cell culture experiments

View raw extracted JSON

{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "ELF",
    "source": "laboratory equipment (CO2 incubator, thermostatic water bath, laboratory shaker table)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "cell cultures (experimental environment)",
  "sample_size": null,
  "outcomes": [
    "Measured stray ELF magnetic field levels around laboratory equipment",
    "Spatial distribution and temporal variation of ELF magnetic fields",
    "Frequency spectral characteristics (FFT) of magnetic field signals"
  ],
  "main_findings": "Measurements around a CO2 incubator, water bath, and shaker table found that the equipment can add considerable ELF magnetic fields to ambient background or to intentional exposures. Reported maximum stray magnetic fields exceeded 3 µT (incubator), 20 µT (water bath), and 75 µT (shaker table), with high spatial and time-domain variability.",
  "effect_direction": "unclear",
  "limitations": [
    "No sample size or number of devices/measurement locations specified in the abstract",
    "No biological/health outcomes assessed; study focuses on exposure characterization and potential confounding in cell culture experiments"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "extremely low frequency",
    "ELF",
    "magnetic fields",
    "stray fields",
    "laboratory equipment",
    "CO2 incubator",
    "water bath",
    "shaker table",
    "cell culture",
    "co-exposure",
    "confounding",
    "FFT",
    "spatial distribution",
    "temporal variation"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.34,
      "reason": "Assesses ELF magnetic field exposure in a laboratory environment from common equipment, relevant to workplace/lab exposure characterization."
    }
  ]
}

AI can be wrong. Always verify against the paper.

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: 10.3109/15368378.2015.1076440
PubMed: 26444200

Read the original paper →

Related papers

← Back to the Research Library