Inter-beat intervals of cardiac-cell aggregates during exposure to 2. 45 GHz CW, pulsed, and square-wave-modulated microwaves
- Louisiana Tech Univ., Ruston (United States)
- Emory Univ., Atlanta, GA (United States)
Inter-beat intervals of aggregated cardiac cells from chicken embryos were studied during 190s exposures to 2.45 GHz microwaves in an open-ended coaxial device. Averaged specific-absorption rates (SARs) and modulation conditions were 1.2-86.9 W/kg continuous-wave (CW), 1.2-12.2 W/kg pulse modulation (PW, duty cycle [approximately] 11%), and 12.0-43.5 W/kg square-wave modulation (duty cycle = 50%). The inter-beat interval decreased during microwave exposures at 42.0 W/kg and higher when CW or square-wave modulation was used, which is consistent with established effects of elevated temperatures. However, increases in the inter-beat interval after PW exposures at 8.4-12.2 W/kg, are not consistent with simple thermal effects. Analysis of variance indicated that SAR, modulation, and the modulation-SAR interaction were all significant factors in altering the interbeat interval. The latter two factors indicated that the cardiac cells were affected by athermal as well as thermal effects of microwave exposure.
- OSTI ID:
- 6440379
- Journal Information:
- Bioelectromagnetics (New York); (United States), Vol. 14:1; ISSN 0197-8462
- Country of Publication:
- United States
- Language:
- English
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ANIMAL CELLS
SENSITIVITY
MICROWAVE RADIATION
BIOLOGICAL EFFECTS
CHICKENS
EMBRYOS
GHZ RANGE 01-100
HEART
TISSUE CULTURES
ANIMALS
BIRDS
BODY
CARDIOVASCULAR SYSTEM
ELECTROMAGNETIC RADIATION
FOWL
FREQUENCY RANGE
GHZ RANGE
ORGANS
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