A 60 Hz electric and magnetic field exposure facility for nonhuman primates: design and operational data during experiments.
← Research streamAn exposure facility was designed to generate 60 Hz vertical electric fields up to 65 kV/m and horizontal magnetic fields up to 100 microT. Mapping and operational data indicated the apparatus produced homogeneous, stable fields at desired intensities with ne…
Study snapshot
Abstract
A unique exposure facility was designed and constructed to generate large-scale vertical electric fields (EF) of up to 65 kV/m and horizontal magnetic fields (MF) of up to 100 microT (1G), so that the behavioral and neuroendocrine effects of 60 Hz EF or combined electric and magnetic field (E/MF) exposure could be examined using nonhuman primates as subjects. Facility design and operational problems and their solutions are presented, and representative operational data from four sets of experiments are provided. A specially designed, optically isolated, 4 cm spherical-dipole EF probe and a commercially available MF probe were used to map the EF and MF within the fiberglass animal cages. In addition, amplifiers, signal conditioners, and A/D converters provided EF, MF, and transformer signals to a microcomputer at 15 min intervals. The apparatus produced homogeneous, stable E/MF at the desired intensities, and the fiberglass cages did not produce appreciable distortion or attenuation. Levels of recognized EF artifacts such as corona and ozone were negligible. The facility worked as intended, providing a well-characterized and artifact-controlled environment for experiments with baboons (Papio cynocephalus).
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.
Main findings
An exposure facility was designed to generate 60 Hz vertical electric fields up to 65 kV/m and horizontal magnetic fields up to 100 microT. Mapping and operational data indicated the apparatus produced homogeneous, stable fields at desired intensities with negligible corona/ozone artifacts and minimal distortion/attenuation from fiberglass cages.
Outcomes measured
- Exposure facility design and operational performance
- Electric field (EF) and magnetic field (MF) mapping within animal cages
- Field homogeneity and stability
- Assessment of EF-related artifacts (e.g., corona, ozone)
Limitations
- No behavioral or neuroendocrine experimental results are reported in the abstract
- Sample size and experimental protocols for the four sets of experiments are not described in the abstract
- Exposure duration and schedules are not specified in the abstract
View raw extracted JSON
{
"study_type": "engineering",
"exposure": {
"band": "ELF",
"source": "exposure facility",
"frequency_mhz": null,
"sar_wkg": null,
"duration": null
},
"population": "Nonhuman primates (baboons; Papio cynocephalus)",
"sample_size": null,
"outcomes": [
"Exposure facility design and operational performance",
"Electric field (EF) and magnetic field (MF) mapping within animal cages",
"Field homogeneity and stability",
"Assessment of EF-related artifacts (e.g., corona, ozone)"
],
"main_findings": "An exposure facility was designed to generate 60 Hz vertical electric fields up to 65 kV/m and horizontal magnetic fields up to 100 microT. Mapping and operational data indicated the apparatus produced homogeneous, stable fields at desired intensities with negligible corona/ozone artifacts and minimal distortion/attenuation from fiberglass cages.",
"effect_direction": "unclear",
"limitations": [
"No behavioral or neuroendocrine experimental results are reported in the abstract",
"Sample size and experimental protocols for the four sets of experiments are not described in the abstract",
"Exposure duration and schedules are not specified in the abstract"
],
"evidence_strength": "insufficient",
"confidence": 0.78,
"peer_reviewed_likely": "yes",
"keywords": [
"60 Hz",
"ELF",
"electric field",
"magnetic field",
"exposure facility",
"nonhuman primates",
"baboons",
"Papio cynocephalus",
"field mapping",
"artifacts",
"corona",
"ozone"
],
"suggested_hubs": [
{
"slug": "occupational-exposure",
"weight": 0.22,
"reason": "Describes a controlled high-intensity 60 Hz EF/MF exposure setup and measurement methods relevant to exposure assessment contexts."
}
]
}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: 10.1002/bem.2250160703
PubMed: 8787563
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