Study type: Medical/biological study (experimental study)

Effect of 9.6-GHz pulsed microwaves on the orb web spinning ability of the cross spider (Araneus diadematus). med./bio.

Published in: Bioelectromagnetics 1986; 7 (1): 101-105

Aim of study (acc. to author)

Web-spinning ability of the spider was employed to investigate the effect of microwaves on CNS function.

Background/further details

The ability of cross spider to spin an orb web is changed by many drugs that affect the CNS activity, and therefore it can be used as a screening test for the CNS activity of drugs.



Exposure Parameters
Exposure 1: 9.6 GHz
Modulation type: pulsed
Exposure duration: continuous for 16 h

Exposure 1

Main characteristics
Frequency 9.6 GHz
Exposure duration continuous for 16 h
Additional info calculated resonant frequency: 10.2 GHz
Modulation type pulsed
Pulse width 1 µs
Packets per second 1,000
Additional info

970-1000 pulses/sec

Exposure setup
Distance between measurement device and exposure object 0.15 m
Chamber Environmentally controlled Styrofoam anechoic chamber maintained at 22°C and 50% relativ humidity
Additional info For microwave exposure and sham exposure frames of plexiglas (outside frame support 0.95-1.27cm strips; front and back panels 0.32cm, overall dimension 45x33x7cm hxwxd) were used.
Measurand Value Type Method Mass Remarks
power density 100 W/m² mean measured - estimated SAR value: 40 mW/g
power density 1 W/m² mean measured - estimated SAR value: 0.4 mW/g
power density 10 W/m² mean measured - estimated SAR value: 4 mW/g

Reference articles

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

Under these experimental conditions, 9.6-GHz pulsed microwaves did not affect the web patterns and the web-spinning ability of the cross spider.

Study character:

Study funded by