Biological effects of high-frequency electromagnetic fields on Salmonella typhimurium and Drosophila melanogaster

✍ Scribed by Yngve Hamnerius; Åsa Rasmuson; Bertil Rasmuson

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 666 KB
• Volume: 6
• Category: Article
• ISSN: 0197-8462
• DOI: 10.1002/bem.2250060407

✦ Synopsis

Salmonella typhirntiriurn and Drosophila melanogaster were exposed to continuous wave (CW) 2.45-GHz electromagnetic radiation, pulsed 3. 10-GHz electromagnetic radiation, CW 27.12-MHz magnetic fields, or CW 27.12-MHz electric fields (only Drosophila). The temperatures of the treated sample and the nonexposed control sample were kept constant.

The temperature difference between exposed and control samples was less than k 0.3 "C. Ames' assays were made on bacteria that had been exposed to microwaves (SAR 60-130 Wlkg) or RF fields (SAR up to 20 Wikg) when growing exponentially in nutrient broth. Survival and number of induced revertants to histidine prototrophy were determined by common plating techniques on rich and minimal agar plates. The Drusophila test consisted of a sensitive somatic system where the mutagenicity was measured by means of mutations in a gene-controlling eye pigmentation. In none of these test systems did microwave or radiofrequency fields induce an elevated mutation frequency. However, a significantly higher concentration of cells was found in the bacterial cultures exposed to the 27-MHz magnetic field or 2.45-GHz CW and 3.10-GHz pulsed microwave radiation.