Naslov
Instrumentation for electromgnetic fields generation in biological measurements

Autori
Tkalec, Mirta ; Malarić, Roman ; Malarić, Krešimir ; Sedlar, Miljenko ; Regula, Ivan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings of Abstracts / 8th Croatian Biological Congress / Besendorfer, Visnja ; Kopjar, Nevenka - Zagreb : Hrvatsko biološko društvo, 2003, 175-176

Skup
8th Croatian Biological Congress

Mjesto i datum
Zagreb, Hrvatska, 27.09.2004. - 02.10.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
magnetic field; electric field; Helmholtz coil; GTEM-cell; Lemna minor

Sažetak
Electromagnetic fields (EMFs) are part of everyday life in modern world. Extremely low-frequency EMFs (50 Hz) are produced by every electric home appliance, electric power transmission and distribution lines. The last ten years mobile phones have been widely used all around the world. They operate on the EMF frequencies from 400 MHz to 1900 MHz. The effects of EMFs on living organisms have been the subject of debate and research for the last thirty years. The instrumentation for generation of EMFs have been designed at the Faculty of Electrical Engineering and Computing, Zagreb, and can be used for controlled exposure to different EMFs. To study the effect of extremely low-frequency EMF, duckweed (Lemna minor) - the model plant in biological measurement, was exposed to the magnetic field in Helmholtz coil and to the electric field between two parallel circle electrodes. For the effect of mobile phones frequencies duckweeds were exposed in Gigahertz Transversal Electromagnetic Mode (GTEM) cell. Exposure for 24 hours to magnetic and electric field of 50 Hz with strength 1 mT slightly decreased the growth of Lemna minor. Mobile phone frequencies of 400, 900 and 1900 MHz with low field strength (<10 V/m) did not change the growth of duckweed significantly, but 400 and 900 MHz at higher field strength (23 V/m) reduced it significantly. The research confirmed that instrumentation used in these experiments is suitable for evaluation of biological effects of EMFs. The effect of different field strengths, exposure times and modulation can be tested with these instrumentation in further experiments.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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