Studientyp:
Medizinische/biologische Studie
(experimentelle Studie)
No effects of GSM-modulated 900 MHz electromagnetic fields on survival rate and spontaneous development of lymphoma in female AKR/J mice
med./bio.
[Keine Wirkung von GSM-modulierten 900 MHz elektromagnetischen Feldern auf die Überlebensrate und spontane Entwicklung von Lymphomen bei weiblichen AKR/J-Mäusen]
Von:
Sommer AM, Streckert J, Bitz AK, Hansen VW, Lerchl A
Synthetic GSMmodulationpulse pattern and frequency spectrum simulating a typical GSM scenario, combining the emissions from a base station (downlink) with those from a mobile phone in DTX operation mode (uplink), thus including 2 Hz, 8 Hz, 217 Hz, and 1733 Hz frequency components.
Both waveguides (exposure and sham-exposure) of 4 m diameter and 17 cm vertical plate distance were placed within the same room and carried up to 24 cages measuring 425 mm Π265 mm Π160 mm (L ΠW ΠH) each of them housing 6-7 mice. The cage area was covered with trapezoidal lids (3 cages per opening) with wire mesh. At the outer boundaries of the units, absorbers were installed.
Aufbau
A modulated signal generator and an amplifier were connected to the cone antenna of one unit (and also the presence of the field was monitored continuously) via a "black box" so that it could not be seen which group of animals was exposed (blind design).
Zusatzinfo
Because the plate distance of the radial waveguide had to be chosen larger than half the wavelength due to the regulated height of the cages, special modifications of the fundamental geometry had to be performed to obtain only the fundamental TEM-mode and avoid the propagation of the unwanted higher order modes.
Bundesamt für Strahlenschutz (BfS; Federal Office for Radiation Protection), Salzgitter, Germany
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