EMF Research Studies

DC ELECTRICAL ENVIRONMENT IN PROXIMITY TO VDTS

Jonathan M. Charry, William H. Bailey, T. Dan Bracken · 1985

Physiotherapy

D E Oliver et al. · 1984

Electric-Field Exposure of Persons Using Video Display Units

S.M. Harvey · 1984

Researchers measured electric fields from four video display units over a frequency range from DC to 1 MHz using a capacitive sensor on a simple simulation of the human body. The electric fields were the sum of three components from the charged CRT screen, the flyback transformer, and the low-voltage circuitry. Flyback transformer fields had pulse repetition rates of 15.8 to 18.5 kHz with peak-to-peak amplitudes of 19 to 170 V/m and rms amplitudes of 4 to 35 V/m. CRT fields showed DC magnitudes of 300 to 7,000 V/m after 0.5 hours and rms modulation amplitudes of 10 to 65 V/m. Operator exposures were typically two to three orders of magnitude below permitted exposure limits, leading to the conclusion that these VDUs present no hazard within existing guidelines.

VDT radiation: What's known, what isn't

Louis Slesin · 1984

The article reviews concerns about radiation from video display terminals (VDTs) in the workplace. VDTs emit very low frequency (VLF) radiation from the flyback transformer at about 16,000 pulses per second. The VLF pulses are similar in shape and intensity to those that caused adverse effects on chick embryos in Delgado's laboratory. Eleven clusters of problem pregnancies and miscarriages have been reported among women working on or near VDTs in the U.S. and Canada.

WEST GERMANY PUBLISHES EMF EXPOSURE STANDARD

Thomas C. Rozzell · 1984

The article reports that West Germany published its first official human-exposure guidelines for electromagnetic fields, applicable to both workers and the general public. The German standard covers frequencies from 0.01 MHz to 3900 GHz, which is wider than the ANSI standard’s 0.1 MHz to 100 GHz range.

RADIOFREQUENCY SEALER EQUIPMENT: LOCATION SURVEYS OPERATOR EXPOSURES

R. L. Waterfield, J. A. Allstadt · 1983

TREATMENT OF DELAYED UNION AND PSEUDARTHROSIS BY LOW FREQUENCY PULSING ELECTROMAGNETIC STIMULATION

G. Fontanesi, F. Giancecchi, R. Rotini, R. Cadossi · 1983

Changes in Microwave Radiation Exposure Standards

B.M. Savin et al. · 1983

Cancer Incidence and Electromagnetic Radiation

John R. Lester, Dennis F. Moore · 1982

VISUAL DISPLAY TERMINAL INCIDENTS REPORTED TO THE RADIATION INCIDENTS REGISTRY

Unknown authors · 1982

A Conversation With Charles Wallach - Is there a health risk in using CRT-type VDTs for prolonged periods of time?

Brian Alley, Charles Wallach · 1982

Microwave and RF Hazard Standard Considerations

H. P. Schwan · 1982

The total frequency range is divided into four parts: below resonance, resonance, hot spot, and surface heating ranges. In the resonance range, absorption can be more than four times the incident radiation, with average SAR peaking near 80 MHz and extending from 30 to 300 MHz. Hot spots occur from 0.3 to 2 GHz for a human head model, with temperature elevations of 0.5°C at 10 mW/g SAR and a thermal time constant of about 3 minutes.

Magnetic Necklace: Its Therapeutic Effectiveness on Neck and Shoulder Pain

Chang-Zern Hong et al. · 1982

Researchers studied 101 volunteers in a double-blind trial with four groups matched for pain status and magnetic or nonmagnetic necklace assignment. All subjects wore the necklaces 24 hours per day for 3 weeks. Proximal ulnar nerve conduction time decreased significantly only in pain-free subjects wearing the magnetic necklace, while suprascapular nerve excitation threshold did not change in any group.

IEEE POSITION ON HEALTH ASPECTS OF VIDEO DISPLAY TERMINALS

Unknown authors · 1982

Effects of Cathode Ray Video Displays on Human Health

Charles Wallach · 1982

Prolonged CRT use is associated with eye, nose, throat, and skin irritations, headaches, dizziness, nausea, pain, malaise, and premature births or miscarriages. The author proposes that the high positive surface charge on CRT screens neutralizes negative ions, increases positive ion concentrations, and repels airborne particles toward operators.

CANCER MORTALITY AND AIR FORCE BASES

John R. Lester, Ph.D. and Dennis F. Moore, M.D. · 1982

SAFETY GUIDE FOR VIDEO-DISPLAY TERMINALS

P. Hansen · 1982

American National Standard Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 300 kHz to 100 GHz

Unknown authors · 1982

Psychological symptoms and intermittent hypertension following acute microwave exposure

Unknown authors · 1982

Researchers followed two men for 12 months after they were accidentally and acutely irradiated with X-band microwave radiation. Both men developed similar psychological symptoms including emotional lability, irritability, headaches, and insomnia. Several months later hypertension was diagnosed in both patients with no organic basis found for the psychological problems and no secondary cause for the hypertension.

Decreased nocturnal plasma melatonin peak in patients with estrogen receptor positive breast cancer

Unknown authors · 1982

Researchers measured plasma melatonin concentrations over 24 hours in 20 women with clinical stage I or II breast cancer. In ten patients with estrogen receptor positive tumors, the nocturnal melatonin increase was much lower than in eight control subjects. A significant correlation was found between peak plasma melatonin concentration and tumor estrogen receptor concentration in 19 patients.

POTENTIAL HEALTH HAZARDS OF VIDEO DISPLAY TERMINALS

William E. Murray et al. · 1981

FDA Sees No Radiation Risk in VDT Screens

Eliot Marshall · 1981

The Hazards of VDTs

Bob DeMatteo · 1981

SYNOPSIS OF SUGGESTED GUIDELINES BASED ON 1981 INFORMATION

T. F. Budinger · 1981

The document revises previous NMR instrumentation and clinical study guidelines based on new information and reanalysis. For static magnetic fields, harmful physiological or genetic effects are not expected below 2 T. For changing magnetic fields, the induced current effect threshold is above 5 mT at 1-100 Hz, though waveform, repetition rate, maximum B field, and exposure duration need further study. RF heating guidelines set a practical upper limit of a few watts for short studies under 10 minutes and 1 W/kg for long-term studies, with power absorption estimated via RF coil Q measurements.

ELECTRIC FIELD ENHANCED AEROSOL EXPOSURE IN VISUAL DISPLAY UNIT ENVIRONMENTS

Walter Cato Olsen · 1981

Researchers surveyed electrostatic fields in VDU work areas and measured aerosol deposition on skin and a high-voltage sampling device. Submicron particle deposition increased substantially and nearly proportionally with electric field intensity, reaching fluxes at least an order of magnitude higher than zero-field conditions under rash-equivalent conditions. Sulfur and chlorine from outdoor aerosol were relatively abundant in field-generated deposits and may be components of the compounds causing rashes.