FURTHER STUDIES OF TESTIS CYTOLOGY IN MICE IRRADIATED WITH 2450-MHZ MICROWAVES
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Shirley Motzkin, Julie Feinstein, Zhimeng Lu
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Researchers exposed mice to 2450 MHz microwaves at 0.6 watts forward power with an absorbed dose of 12 to 15 mW/g and measured CR+ spleen cells on days 3 and 6. A minimum 15-minute exposure induced a significant increase by day 3 that peaked at day 6, and a maximal increase occurred after 45 minutes. The increase did not require mature T cells and only occurred in mice older than 6 to 8 weeks, indicating a maturation prerequisite. The effect was not mediated by LPS, and susceptibility mapped to the H-2k haplotype.
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Researchers exposed 20 time-bred rats to 100-MHz RF at 500 W forward power (50 mW/cm²) starting on day 6 of pregnancy for 4 hours per day, 7 days per week. The mean specific absorption rate for rats was 2.8 mW/g. No differences were found in growth, neurological development, locomotor activity, hematology, immune function, or mutagenicity between exposed and sham-exposed rats. However, significant changes in regional brain acetylcholinesterase activities were observed in chronically exposed rats.
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Researchers placed neuroblastoma cells in homogeneous time-varying magnetic fields at 2 gauss average using 4-inch air gap coils. The induced current wave forms at yA/cm² level were designed to excite only surface or surface-coupled transport processes. Significant differences in dendritic outgrowth and surface adhesion versus multiplication were detected as a function of the induced current wave forms. In mice with transplanted Lewis lung tumors, 27 MHz pulsed fields inhibited or accelerated tumor growth depending on timing and pulsed frequencies.
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Researchers irradiated freshly prepared rat liver mitochondria at 8.58 mm (35 GHz) and at 40 discrete wavelengths between 5.00 and 6.00 mm (60 to 50 GHz) to evaluate effects on oxidative phosphorylation. The study found no significant effect of millimeter wave irradiation on oxidative phosphorylation.
P. E. Братковский