Study type: Medical/biological study (experimental study)

Attempts to alter 45Ca2+ binding to brain tissue with pulse-modulated microwave energy. med./bio.

Published in: Bioelectromagnetics 1982; 3 (4): 475-478

Aim of study (acc. to author)

To test the exposure effects of pulse-modulated microwaves on 45Ca2+ binding in rat neural tissue in vivo and in vitro.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 1 GHz
Modulation type: pulsed
Exposure duration: continuous for 20 min
Exposure 2: 2.45 GHz
Modulation type: pulsed
Exposure duration: continuous for 20 min
Exposure 3: 2.06 GHz
Modulation type: pulsed, CW
Exposure duration: continuous for 20 min

Exposure 1

Main characteristics
Frequency 1 GHz
Type
Exposure duration continuous for 20 min
Additional info in vitro
Modulation
Modulation type pulsed
Pulse width 20 ms
Repetition frequency 16 Hz
Exposure setup
Exposure source
Distance between exposed object and exposure source 1 m
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
SAR 0.29 W/kg - - - for power density 1mW/cm²
SAR 2.9 W/kg - - - for power density 10 mW/cm²
power density 1 mW/cm² - - - -
power density 10 mW/cm² - - - -

Exposure 2

Main characteristics
Frequency 2.45 GHz
Type
Exposure duration continuous for 20 min
Additional info in vitro
Modulation
Modulation type pulsed
Pulse width 20 ms
Repetition frequency 16 Hz
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
SAR 0.3 W/kg - - - -
power density 1 mW/cm² - - - -

Exposure 3

Main characteristics
Frequency 2.06 GHz
Type
Exposure duration continuous for 20 min
Additional info in vivo
Modulation
Modulation type pulsed, CW
Pulse width 10 ms
Additional info

CW or pulsed with a pulse repetiion frequency of 8 Hz, 16 Hz, 32 Hz

Exposure setup
Exposure source
Distance between exposed object and exposure source 4.5 m
Setup animals placed in an E-orientation in front of the antenna in a climate-controlled anechoic chamber
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power density 0.5 mW/cm² - - - -
power density 1 mW/cm² - - - -
power density 5 mW/cm² - - - -
power density 10 mW/cm² - - - -
SAR 0.24 W/kg - - - per 1 mW/cm²
SAR 0.12 W/kg minimum - - -
SAR 2.4 W/kg maximum - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • after exposure

Main outcome of study (acc. to author)

There were no significant differences in efflux of 45Ca2+ between microwave- and sham-exposed groups.

Study character:

Study funded by

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