Open AccessExposure systems for studies of the effects of electromagnetic fields on biological systems
Author(s) -
HAMNERIUS YNGVE
Publication year - 1983
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.1601-5223.1983.tb00577.x
Subject(s) - specific absorption rate , microwave , electromagnetic field , electric field , magnetic field , field strength , materials science , absorption (acoustics) , field (mathematics) , electromagnetic radiation , biology , nuclear magnetic resonance , physics , optics , electrical engineering , antenna (radio) , quantum mechanics , engineering , mathematics , pure mathematics
Exposure systems for studies of biological effects of electromagnetic fields have been developed. The systems were designed for four different exposures: 27.12 MHz CW electric field, 27.12 MHz CW magnetic field, 2.45 GHz CW EM far field and 3.1 GHz pulsed EM far field. Ten‐milliliter temperature‐controlled sample containers were designed. The differences between the temperatures of the exposed samples and the non‐exposed control samples were measured to be less than ± 0.3±C. The specific absorption rate SAR in the exposed samples were in the range 0.35–0.70 W/kg for microwaves normalized to an incident power density of 1 mW/cm 2 . For 27.12 MHz the SAR values were up to 20 W/kg for 20 A/m magnetic fields and about 3 W/kg for electric fields (field‐strength in air 10 kV/m). The equipment has proven suitable for genetic tests performed with bacteria and embryos of Drosophila melanogaster .