Bluetooth Radiation Research

[Quantitative patterns in the cytogenetic action of microwaves]

Koveshnikov IV, Antipenko EN · 1991

Microwave irradiation of rats at 2.45 GHz activates pinocytotic-like uptake of tracer by capillary endothelial cells of cerebral cortex.

Neubauer C, Phelan AM, Kues H, Lange DG · 1990

Researchers exposed male albino rats to 2.45-GHz microwaves with 10-microseconds pulses at 100 pps. Exposure at 10 mW/cm2 for 30 to 120 minutes increased tracer uptake through the blood-brain barrier. The uptake depended on both power density and exposure duration. At 5 mW/cm2, a 15-minute exposure had no effect. Pretreating rats with colchicine nearly completely blocked the microwave-induced uptake.

Influence of radiofrequency radiation on chromosome aberrations in CHO cells and its interaction with DNA-damaging agents.

Kerbacher JJ, Meltz ML, Erwin DN, · 1990

In vitro lymphocyte proliferation induced by radio-frequency electromagnetic radiation under isothermal conditions.

Cleary SF, Liu LM, Merchant RE · 1990

Researchers exposed whole human blood in vitro for 2 hours to 27 or 2,450 MHz radio-frequency electromagnetic radiation under isothermal conditions at 37 degrees C. At SARs below 50 W/kg, exposure produced a dose-dependent, statistically significant increase in lymphocyte proliferation, while exposure at 50 W/kg or higher suppressed proliferation relative to sham-exposed cells. The researchers concluded that these biphasic, dose-dependent effects on lymphocyte proliferation were not dependent on heating. There were no detectable effects of RF radiation on lymphocyte morphology or viability.

Proflavin and microwave radiation: absence of a mutagenic interaction.

Meltz ML, Eagan P, Erwin DN · 1990

Researchers studied forward mutation at the thymidine kinase locus in L5178Y mouse leukemic cells exposed to 2.45-GHz pulsed-wave RFR and proflavin. Exposures used 500 or 600 W net forward power, giving a SAR of approximately 40 W/kg, for 4 hours with temperature controls. No statistically significant increase in mutant frequency was found with combined RFR and proflavin versus proflavin alone, no change in colony-size distribution occurred, and RFR alone showed no mutagenic action.

Low-level microwave irradiation and central cholinergic systems

Unknown authors · 1989

Low-level microwave irradiation and central cholinergic systems

Unknown authors · 1989

Researchers exposed rats to low-level pulsed microwave radiation at 2.45 GHz (the same frequency as microwave ovens) and found significant changes in brain chemistry, including alterations to the cholinergic system that controls memory and learning. The study revealed that even brief 20-minute exposures affected brain receptor concentrations in key regions like the hippocampus and frontal cortex.

Low-level microwave irradiation and central cholinergic systems

Unknown authors · 1989

University of Washington researchers exposed rats to pulsed 2.45 GHz microwaves (the same frequency as microwave ovens) and found significant changes to brain chemistry systems involved in memory and learning. The study showed that even low-level microwave exposure altered choline uptake and muscarinic receptors in brain regions critical for cognitive function. These neurochemical changes occurred at power levels well below current safety standards.

Effect of radiofrequency radiation on mRNA expression in cultured rodent cells.

Parker JE, Kiel JL, Winters WD · 1988

Researchers exposed four rodent cell lines to 2450 MHz microwave radiation at a Specific Absorption Rate of 103.5 +/- 4.2 W/kg at temperatures of 37, 40, 42, and 45 degrees C. The researchers extracted mRNA from exposed and sham-exposed cells and used DNA probes of oncogenes, heat shock protein, or long terminal repeat sequences to look for differences in mRNA expression. With the cell lines and probes used, no significant differences in mRNA expression were observed after microwave exposure.

Reduced exposure to microwave radiation by rats: frequency specific effects.

D'Andrea JA, DeWitt JR, Portuguez LM, Gandhi OP. · 1988

Two experiments tested whether frequency-specific hotspot formation in the body and tail of rats would have behavioral consequences. Rats were placed in a cage where occupying one side triggered microwave exposure and occupying the other side ended it. Reduced exposure to 360-MHz and 2450-MHz microwaves at 1, 2, 6 and 10 W/kg were significantly different from 700-MHz microwaves. A second experiment found the threshold for reduced exposure to 2450-MHz microwaves fell between whole-body SARs of 2.1 and 2.8 W/kg.

Microwave effects on plasmid DNA

Unknown authors · 1987

Purified plasmid DNA was exposed to microwave radiation at nonthermal levels in the frequency range from 2.00 to 8.75 GHz. The exposure produced single- and double-strand breaks detected by agarose gel electrophoresis. Microwave-induced DNA damage depended on the presence of small amounts of copper. The effect was dependent on both microwave power and exposure duration. Cuprous ions, but not cupric ions, mimicked the microwave effects on DNA.

Radiation protection, in small to extra-large

Michael Kachmar · 1986

Federal Radiation Protection Guidance; Proposed Alternatives for Controlling Public Exposure to Radiofrequency Radiation; Notice of Proposed Recommendations

Unknown authors · 1986

The EPA proposed four alternative approaches to limit public exposure to radiofrequency radiation. Three options are regulatory and would set whole-body average SAR limits of 0.04, 0.08, and 0.4 W/kg for frequencies above 3 MHz. For frequencies below 3 MHz, the regulatory options would limit electric field intensity to 87, 275, and 614 V/m and magnetic field intensity to 0.23, 0.73, and -1.63 A/m respectively. The fourth option is nonregulatory and would use information and technical assistance programs instead of adopting Federal Guidance.

Safe Distances from Radiofrequency Transmitters for Electric Blasting Operations

Unknown authors · 1985

WEST GERMANY PUBLISHES EMF EXPOSURE STANDARD

Thomas C. Rozzell · 1984

The article reports that West Germany published its first official human-exposure guidelines for electromagnetic fields, applicable to both workers and the general public. The German standard covers frequencies from 0.01 MHz to 3900 GHz, which is wider than the ANSI standard’s 0.1 MHz to 100 GHz range.

DOSIMETRIC CONCEPTS AND HEALTH RISK EVALUATION IN NONIONIZING ELECTROMAGNETIC RADIATION PROTECTION

Przemyslaw Czerski, Mays L. Swicord · 1984

The drive to regulate electromagnetic fields

Eric J. Lerner · 1984

Changes in Microwave Radiation Exposure Standards

B.M. Savin et al. · 1983

American National Standard Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 300 kHz to 100 GHz

Unknown authors · 1982

RF RADIATION: LEGAL AND POLICY IMPLICATIONS

Unknown authors · 1982

Environmental Health Criteria 16: Radiofrequency and Microwaves

Sol M. Michaelson · 1982

The review evaluates the World Health Organization's Environmental Health Criteria 16 document on radiofrequency and microwave fields from 100 kHz to 300 GHz. The reviewer finds the publication unbalanced because it accepts nonthermal interaction literature with cursory critique while neglecting refuting evidence. The review notes that the document's designations of high, medium, and low power densities are ambiguous and ignore the frequency dependence of bioeffects. It points out specific errors in Table 10 frequency designations and an incomplete discussion of chronic cataract studies that omitted rabbit and monkey data showing no ocular damage. The reviewer concludes the document does not meet the high scientific caliber and accuracy of usual WHO publications.

ABSTRACTS - 4th Annual Scientific Session BIOELECTROMAGNETICS SOCIETY

Unknown authors · 1982

The study induced posterior subcapsular cataracts in rabbit eyes using 2.45 GHz continuous wave radiation. Successive stages of cataract development were documented with color stereophotographs taken using a Donaldson stereo-ophthalmic camera with electronic flash illumination and two and one half times initial magnification on film. The photographs were viewed in a Donaldson special viewing apparatus that allowed consecutive stages to be seen by turning a circular knob. The viewed eye appeared as if seen in the living animal through a magnifying lens.

Radio-Frequency and Microwave Radiation

Howard Bassen · 1980

This 1980 FDA research by H. Bassen examined radio-frequency and microwave radiation exposure measurement and safety standards. The study focused on how these electromagnetic fields are absorbed by human tissue and established methods for assessing exposure levels. This represents early foundational work in understanding RF/microwave radiation effects on human health.

Non-Ionizing Radiation: Dealing With a Complicated Situation

Angelo Vassallo · 1980

Measurements of Emission Levels During Microwave and Shortwave Diathermy Treatments

Paul S. Ruggera · 1980