Study type: Medical/biological study (observational study)

The effects of radiofrequency (< 30 MHz) radiation in humans med./bio.

By: Zhao Z, Zhang S, Zho H, Su J, Li L
Published in: Rev Environ Health 1994; 10 (3-4): 213-215
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Aim of study (acc. to author)

To present the results of a survey carried out during 1973-1975 on the effects of high frequency radiation on workers of electronic industries.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 30 MHz
Exposure duration: 6 h/day, 6 days/week for 1 year
Exposure 2: 30 MHz
Exposure duration: repeated daily exposure, 6 h/day, 6 days a week for 1 year

Exposure 1

Main characteristics
Frequency 30 MHz
Exposure duration 6 h/day, 6 days/week for 1 year
Modulation
Modulation type unspecified, cf. additional info
Exposure setup
Exposure source
Additional info Electric field was measured with a type PL1 near field intensity meter.
Parameters
Measurand Value Type Method Mass Remarks
electric field strength 100 V/m cf. remarks measured - more than or equal to 1 V/cm
Additional parameter details

Magnetic field strength: 10 A/m.

Exposure 2

Main characteristics
Frequency 30 MHz
Exposure duration repeated daily exposure, 6 h/day, 6 days a week for 1 year
Exposure setup
Exposure source
Parameters
Measurand Value Type Method Mass Remarks
electric field strength 100 V/m cf. remarks measured - less than 1 V/cm
Additional parameter details

Magnetic field strength: 10 A/m. For this group the electric field strength was measured to be less than

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:

Main outcome of study (acc. to author)

The results reveal no significant changes in the functioning of the autonomic nervous system and blood parameters in the exposed subjects of either group. Some changes in ECG were observed in the group exposed to high intensity radiation (> or = 100 V/m = 1 V/cm).

Study character:

Study funded by