Biological Effects of Short-Term Influence of Microwave Low-Intensity Electromagnetic Fields
M.G.Shandala et al. · 1977
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M.G.Shandala et al. · 1977
Lin JC · 1977
Maria A. Stuchly · 1977
Unknown authors · 1977
C.A.L. Bassett et al. · 1977
Richard D. Phillips, William T. Kaune · 1977
C. Eugene Moss et al. · 1977
Unknown authors · 1977
Bassen, H., P. Herchenroeder, A. Cheung, S. Neuder · 1977
Stephen S. Rosenfeld · 1977
G. Kantor, D. M. Witters, J. W. Greiser · 1977
The applicator operates at 2.45 GHz with a 15.2 cm diameter and can handle up to 300 Watts of input power. It uses a microwave choke around the aperture to suppress leakage and a resistive card at the horn's back to minimize mismatch when applied to tissue. Impedance matching tests gave a VSWR below 2.1 for four back positions and free space.
Richard A. Tell · 1977
James H. Botsford · 1977
G. Kantor · 1977
Researchers compared heating patterns of new direct contact applicators with conventional spaced applicators using planar phantoms of simulated fat and muscle tissue. The direct contact applicators provided more uniform heating than the spaced applicators. Leakage radiation for a commercial direct contact applicator was measured at less than 5 mW/cm² per 100 W at 5 cm spacing. Scattered field levels for loaded applicators were typically 20 mW/cm² per 100 W at 13 cm distance.
M. O'Donnell, J. W. Mimbs, B. E. Sobel, J. G. Miller · 1977
Tell R A · 1977
John R. Klepper et al. · 1977
André-Jean BERTEAUD, Michèle DARDALHON · 1977
Christopher H. Dodge, Zorach R. Glaser · 1977
R. S. Molday, S. P. S. Yen, A. Rembaum · 1977
Unknown authors · 1977
NEUKOMM Peter A. · 1977
Maximum transmission loss increased from 20 to 30 dB as frequency rose from 200 to 1000 MHz at a 35 mm distance, and from 17 to 24 dB at a 77 mm distance over the same frequency range. The study concluded that ideal telemetry frequencies lie within 75-150 MHz, where losses stay below 18 dB at 35 mm and below 14 dB at 77 mm antenna-trunk distance. The flat helical dipole was recommended as the best antenna for biomechanics telemetry because varying body distance does not detune it out of its bandwidth.
John C. H. Wang · 1977
WIESLAW WIKTOR-JEDRZEJCZAK et al. · 1977
A single exposure significantly increased the proportion of complement-receptor-positive lymphoid cells in the spleen on day 6, with a net increase of 33.5%. Repeated exposures on three days significantly increased complement-receptor-positive cells on days 3, 6, and 9, and also significantly increased immunoglobulin-positive cells on day 6. Total spleen cell numbers and theta-positive cell proportions did not change after either single or repeated exposures.
Lövsund, P., Öberg, P.A., Nilsson, S.E.G. · 1977
Researchers recorded extracellular electrical activity from frog retinal ganglion cells during and after exposure to ELF magnetic fields. The preparations were exposed to magnetic flux densities of 0-80 mT at frequencies of 10-50 Hz. Ganglion cell responses varied with flux density and frequency, and cells responded only to ON-OFF changes in the field.