EMF Research Studies

CELL GROWTH IN A LOW-INTENSITY, 60 Hz MAGNETIC FIELD

S. S. Kronenberg, T. S. Tenforde · 1979

Search for Millimeter Microwave Effects on Enzyme or Protein Functions

P. Tuengler, F. Keilmann, L. Genzel · 1979

The study tested whether millimeter microwaves affect the function of alcohol dehydrogenase and hemoglobin in vitro. Alcohol dehydrogenase was exposed to 40–115 GHz radiation at near 10 mW/cm² while monitoring the reaction rate via NADH absorption using a 337 nm filter. No change in alcohol dehydrogenase turnover rate was detected within a sensitivity of 0.1%. Hemoglobin at half-oxygenation was exposed to absorbed intensity of 3–13 mW/cm² across 40–115 GHz. No shift in the equilibrium oxygen constant of half-oxygenated hemoglobin was detected within a sensitivity of 0.4%.

MILLIMETER WAVE ABSORPTION SPECTRA OF BIOLOGICAL SAMPLES

O. P. Gandhi et al. · 1978

THE LACK OF CORRELATION BETWEEN HEAT AND RADIATION SENSITIVITY IN MAMMALIAN CELLS

Leo E. Gerweck, Peggy Burlett · 1978

The study compared the effect of heat or X-irradiation on the reproductive capacity of 3 cell lines. Two human astrocytoma cell lines showed equal sensitivity to hyperthermia at 42°C or 44°C but differed in radiation sensitivity. Chinese hamster ovary cells were most sensitive to hyperthermia while showing intermediate radiation sensitivity. The results demonstrate a lack of correlation between heat and radiation sensitivity on the cellular level.

ENERGY DEPOSITION IN BIOLOGICAL TISSUE NEAR PORTABLE RADIO TRANSMITTERS AT VHF AND UHF

O. BALZANO, O. GARAY, R.F. STEEL · 1977

GROWTH OF HUMAN BONE MARROW CELLS IN AGAR CULTURE UNDER THE INFLUENCE OF ELECTRICAL CURRENTS

Unknown authors · 1977

Researchers cultured human bone marrow cells in agar and exposed them to AC and DC electrical currents for 7 days. Symmetrical AC impulse current had no effect on cell growth. DC current greater than 10 pA caused severe growth reduction and protein electrophoresis. The growth reduction was proportional to the logarithm of the AC current amplitudes. The reduction was not related to induction, pH changes, or protein electrophoresis.

RF Cell Culture Irradiation System with Controlled Temperature and Field Strength

Arthur W. Guy · 1977

The system was designed for the National Institute for Occupational Safety and Health to determine human RF exposure thresholds in the frequency range D.C. to 100 MHz. The final design uses concentric stainless steel rings with a teflon bottom that forms a liquid-tight seal compressed by brass retainer clamps.

AN OPTICAL NON-PERTURBING PROBE FOR TEMPERATURE MEASUREMENTS IN BIOLOGICAL MATERIALS EXPOSED TO MICROWAVE RADIATION

P. E. Schoen, J. M. Schnur, J. P. Sheridan · 1977

Researchers placed a ruby fragment smaller than 50 µm in a thin-walled capillary with a biological sample and equilibrated it in a thermostatted chamber controlled to ±0.15°C. They measured the ruby R1 fluorescence frequency shift relative to an argon reference line across temperatures. The frequency shift showed a linear relationship with temperature with a slope of 0.141 cm-1/°C. The method achieved a temperature measurement precision of 0.21°C. Tests in 2.4 GHz microwave fields showed no perturbation of the fields or the calibration curve.

Effects of External Electrical Fields on Cell Membranes

U. Zimmermann, G. Pilwat, F. Beckers, F. Riemann · 1976

IN-VITRO RESPONSE OF LYMPHOCYTE CULTURES EXPOSED TO RF RADIATION: PROGRESS REPORT ON FEASIBILITY AND DETERMINATION OF CRITICAL VARIABLES

Richard H. Lovely, Thomas J. Sparks, A.W. Guy · 1976

EVIDENCE FOR COLLECTIVE MAGNETIC EFFECTS IN AN ENZYME – LIKELIHOOD OF ROOM TEMPERATURE SUPERCONDUCTIVE REGIONS

N.A.G. AHMED, J.H. CALDERWOOD, H. FRÖHLICH, C.W. SMITH · 1975

The team measured the magnetic susceptibility of lysozyme solutions while varying the applied magnetic field. At 600 gauss, a 0.011% weight solution showed an increment in diamagnetic susceptibility of order 1.5 × 10^-10, which per molecule was 10^4 times larger than expected for ordinary diamagnetic material. The increase in susceptibility disappeared above a critical field of about 800 gauss. A 0.1% solution showed only slightly higher susceptibility than the 0.011% solution, and humid enzyme powder showed maximum effect at about 50% water content.

LOW ENERGY ELECTROMAGNETIC PERTURBATION OF AN ENZYME SUBSTRATE

B. C. GOODWIN, SILVIA VIERU · 1975

Non-thermal hazards of exposure to radio frequency fields--Microwave Studies--Final Report

Mickey GH, Heller JH, Snyder E · 1975

Microwave Hall Effect Measurements in Biomacromolecular Systems

R. Pethig · 1974

INTERPRETATION OF SOME MICROELECTRODE MEASUREMENTS OF ELECTRICAL PROPERTIES OF CELLS

A. PESKOFF, R. S. EISENBERG · 1973

Depression of phagocytosis: a non-thermal effect of microwave radiation as a potential hazard to health

C. P. MAYERS, J. A. HABESHAW · 1973

Researchers exposed mouse macrophage monolayers perfused with human red blood cells to 2450 MHz microwave radiation at 50 mW/cm² for 30 minutes while maintaining temperature at 37°C. The phagocytic index fell to 6.3 ± 2.5 per cent in irradiated cultures compared with 20.2 ± 5.8 per cent in unirradiated controls, a statistically significant difference (P < 0.025). Phagocytic activity returned to normal after radiation was stopped, and no morphological changes were observed in the macrophages.

Microwave Thawing of Tissue Culture Cells

W. A. G. VOSS, C. WARBY, R. RAJOTTE, M. J. ASHWOOD-SMITH · 1972

Studies on influencing the activity of cellular enzymes by irradiation with high-frequency electromagnetic waves

G. Ohlenschläger, I. Beyer, W. Gruno · 1972

Biophysical Society Abstracts

H. Dugas et al. · 1972

Versuche über den Einfluß elektromagnetischer Wellen auf die Reaktionsfähigkeit von Zellen und Geweben I.-IV. Mitteilung

G. HENNEBERG et al. · 1972

Versuche über den Einfluß elektromagnetischer Wellen auf die Reaktionsfähigkeit von Zellen und Geweben III. Mitteilung: Einfluß der Bestrahlung mit Rotlicht und Mikrowellen auf die Pinocytose von FL-Zellkulturen

Silke Heller · 1972

FL cells grown in tubes on plastic foil were inoculated with ink that had been irradiated with infrared and/or microwaves, then some cells were irradiated themselves, and uptake of ink particles was recorded. Irradiation of the ink with red light followed by irradiation of the cells with cm-waves yielded the highest number of cells that had taken up ink, and this difference from the non-irradiated group was statistically significant. The results indicated a maximum value for the uptake of ink particles into the cells.

Mechanism of the effect of microwaves on the permeability of erythrocytes for potassium and sodium ions

Ismailov ESH · 1971

RADIATION (Lasers, Microwaves, Electrical Fields)

DE ROUNDS, T LANWILL · 1971

The study aimed to determine if subthreshold laser energy in the green to infrared spectrum could produce chromosomal or genetic changes persisting through several cell generations. Human lung and tumor cells received UV laser irradiation as a single pulse. Tumor cells were more susceptible to damage than human fibroblasts, with dilatation and fragmentation of ribosomes in non-tumor cells and no detectable mitochondrial changes. Tumor cells showed extensive blebbing of cytoplasmic components, structureless and swollen mitochondria, and non-membrane bound clear areas of cytoplasm. Few cells showed dramatic changes in nuclear ultrastructure, suggesting the primary damage sites were not the protein synthesis machinery.

COLLAGEN DEVELOPMENT IN TISSUE CULTURES IN VITRO UNDER STATIC MAGNETIC FIELDS

E. ISRAELI, Z. KARNI, Z. SCHUR, D. BARZILAI · 1971

Principal mechanism of the resonance effect of ultrahigh frequencies on hemoglobin

Koreneva, L.G., Ga'iduk, V.I. · 1970