A numerical model of a 5-cm lossy sphere exposed to 3,000 MHz at 30 mW/cm2 for 200 seconds estimated a temperature rise of 0.56°C near the front surface, with heat transfer by conduction and no convective dissipation.
Autoradiographic [14C]2-deoxy-D-glucose mapping showed that pulsed microwave exposure produced symmetrical uptake in auditory nuclei despite unilateral middle ear ablation, consistent with bypassing the middle ear in eliciting auditory responses. Four animals…
![Alterations in activity at auditory nuclei of the rat induced by exposure to microwave radiation: autoradiographic evidence using [14C]2-deoxy-D-glucose.](/mel/og.php?f=og_6051_bdb6aa881d.png)
Rats acutely exposed to a 2.8 GHz pulsed-microwave field at average power densities of 5 and 10 mW/cm2 showed increased errors and altered within-session acquisition compared with control sessions. Exposure at 10 mW/cm2 decreased the rate of sequence completi…
In cultured fibroblast-like human embryo cells, exposure to an industrial-frequency electromagnetic field (50 cps) at 50 or 150 kV/m depressed protein synthesis proportionally to field intensity and duration, with collagen synthesis affected to a greater exte…
![[Effect of an industrial-frequency electromagnetic field on protein biosynthesic processes of embryonal fibroblasts in tissue culture].](/mel/og.php?f=og_5501_2c8521547a.png)
Compared with controls, microwave-exposed S. aureus showed higher activities of malate and alpha-ketoglutarate dehydrogenases, cytochrome oxidase, and cytoplasmic ATPase; membrane ATPase, alkaline phosphatase, and lactate dehydrogenase were unaffected; and gl…
Mice exposed to 2,450-MHz radiation (5–15 mW/cm2) for 1–17 days showed biphasic modulation of spleen lymphocyte responsiveness to mitogens, described as suppression related to microwave-activated macrophages alongside progressive direct lymphocyte stimulation…
Endotoxin-injected rats exposed for 90 minutes to 2450 MHz continuous-wave microwaves at 1 mW/cm2 had significantly higher body temperature than endotoxin-treated sham-irradiated rats, with a power-density-related magnitude (10 mW/cm2 > 5 mW/cm2 > 1 mW/cm2). …
Continuous-wave low-power-density microwave irradiation (average power density 10 mW/cm^2; range 5–50 mW/cm^2; 1.0 GHz) enhanced uptake of [3H]MTX versus nonirradiated controls, observed only over a limited power-density range (5–25 mW/cm^2) with an inverted-…
Mast cells exposed at 2450 MHz with power absorptions of 8.2 or 41.0 mW/g for up to 3 h showed no change in morphology or viability. At 37°C, neither prior nor simultaneous irradiation affected 48/80-induced histamine secretion, but at 44°C, 41.0 mW/g inhibit…
Field-induced changes in heart-beat rate were observed at 80 mW/cm2 continuous-wave exposure but not at lower average power densities (5 mW/cm2). The authors note a possible peak positive chronotropic effect with pulsed microwaves triggered 100 and 200 ms aft…
Wool samples infested with webbing clothes moth eggs, larvae, and adults were exposed to 2450 MHz microwave radiation for 0.5 to 5 minutes to determine the lowest lethal level for each stage. The authors report microwaves could disinfect wool textiles without…
Multiple microbial tester strains were exposed to elevated temperatures or x-band pulsed microwave radiation at various power densities. E. coli pol A- showed decreased growth at microwave power levels ≥20 mW/cm2 and at temperatures >42°C; other strains showe…
Japanese quail embryos exposed during the first eight days of development to 2.45-GHz continuous-wave microwaves at 5 or 20 mW/cm2 showed no changes in embryonic heart morphology or myocardial cell ultrastructure. Enzymatic activities (LDH, GOT, CPK) did not …
Fifteen ampuls with precipitate heated to 60°C in a microwave oven and fifteen heated in a water bath, compared with 15 unheated controls, all met USP concentration requirements with no significant decrease in potency. Microwave-heated ampuls showed a statist…
In cohorts with maximum versus minimum opportunity for radar-related microwave exposure, no adverse effects were detected in mortality, hospitalization, or VA disability compensation that could be attributed to potential microwave radiation exposures during 1…
Microwave exposure alone did not affect fixed interval performance in rats. Chlorpromazine decreased response rate and patterning, diazepam had dose-dependent effects on response rate and reduced patterning. Combining microwaves with either drug did not alter…
In male mice, acute and fractionated SHF microwave exposures at the stated power densities and durations did not induce mutagenic effects as assessed by dominant lethal mutations, abnormal sperm heads, or bone marrow chromosome aberrations.
![[Action of UHF microwaves on the germ and somatic cells of mammals].](/mel/og.php?f=og_6031_034a36dd94.png)
From 1972–1978, dissipated microwave radiation was measured around about 600 microwave devices; measured values fell into safety, dangerous, warning, and intermediate zones. Many devices showed no dissipated microwave radiation or only low values in the safet…
![[Microwave radiation sources requiring periodic or sporadic hygienic control].](/mel/og.php?f=og_6055_838656e40d.png)
After storage at -20°C for 48 hours and thawing to room temperature in a microwave oven, cefazolin sodium admixtures in polyvinyl chloride minibags retained at least 90% of initial antimicrobial activity after an additional four hours at room temperature. Min…
The article analyzes scientific research and values that influenced policy decisions leading to adoption of the 1966 U.S. standard for microwave radiation exposure. It suggests standard setting should remain distinct from basic scientific research and that ad…
