S. E. Jacobs, Margaret J. Thornley, P. Maurice · 1950
Researchers exposed various bacteria, principally Bacterium coli and Staphylococcus aureus, to high-frequency electric fields at 1-65 Mc/s with external electrodes while preventing lethal temperature rise. They used a low-powered variable-frequency generator (1-710 Mc/s) and a high-powered 44 Mc/s diathermy unit. Bacterial survival was judged by viable plate counts using duplicate samples. No significant mortality occurred in any experiment, even at high voltage gradients. The results consistently failed to confirm Fleming's 1944 report of high mortality.
Herbert F. Newman, Seymour F. Wilhelm · 1950
Researchers measured testicular temperatures in 28 volunteers using tissue thermocouples inserted through the scrotal skin. Testicular temperatures were usually lower than rectal temperatures and changed with environmental temperature. Inguinal canals were warmer than the testes in most anesthetized men (average 2.7°F) and warmer than scrotal cavities in all cases (average 3.6°F).
Alma J. Murphy, W. D. Paul, H. M. Hines · 1950
Greater temperature increases occurred in superficial tissues in 247 of 266 experiments, while the least increase was at the 3 cm depth in 240 of 266 experiments. The greatest temperature rise in living tissue occurred during the first ten minutes of irradiation, and dead tissue showed greater temperature increases than living tissue for all wavelengths. After irradiation, living tissue temperatures tended to equalize across all measured depths, while only shorter wavelengths left the surface warmer than deeper tissue.
H. J. MULLER · 1950
Hubner · 1950
T. S. England · 1950
Researchers extended earlier dielectric measurements at 3-18-cm. wavelength to 1-27-cm. and 10-0-cm. wavelengths using surgical tissue specimens. Absorption and phase constants were recorded for each tissue in a waveguide, with measurement accuracies of +10 per cent in absorption and +5 per cent in phase at 1-27-cm., and +5 per cent in absorption and +2 per cent in phase at 10-0-cm. Most tissues behaved like water, fat and bone were relatively transparent, and malignant and normal tissues did not differ significantly.
Leonard Essman, Charles S. Wise · 1950
J. F. HERRICK, D. G. JELATIS · 1950
The study measured dielectric constant and loss of freshly excised tissues including liver, muscle, fat, bone, and bone marrow. The researchers used a microwave dielectrometer they designed and built for the measurements. They also presented dielectric properties of certain body fluids and designed a transformer to improve microwave power transfer into muscle.
Jerome W. Gersten, Khalil G. Wakim, Frank H. Krusen · 1950
Unknown authors · 1950
Unknown authors · 1950
Researchers exposed mouse Leydig (TM3) cells to 1950 MHz RF radiation at a specific absorption rate of 3 W/kg for 24 hours. They measured cell proliferation, cell cycle distribution, apoptosis, reactive oxygen species, testosterone levels, and StAR and P450scc mRNA expression at multiple time points up to 5 days after exposure. After 24 hours of exposure, cell proliferation, testosterone secretion, and P450scc mRNA levels decreased, while apoptosis, ROS, and StAR mRNA levels did not change significantly.
Harold G. Scheie, Bourne Jerome · 1949
Gore I, Isaacson NH · 1949
W. H. Oldendorf · 1949
George Birnbaum · 1949
W. W. Salisbury, John W. Clark, H. M. Hines · 1949
CHARLES S. WISE, BENJAMIN CASTLEMAN, ARTHUR L. WATKINS · 1949
Barbara L. Feucht, A. W. Richardson, H. M. Hines · 1949
Herman J. Flax, Ruth N. Miller, Steven M. Horvath · 1949
England TS, Sharples NA · 1949
Gersten JW, Wakim KG, Herrick JF, Krusen FH · 1949
C. Suffern · 1948
Lawrence L. Siems, A. J. Kosman, Stafford L. Osborne · 1948
A. J. KOSMAN, S. L. OSBORNE, A. C. IVY · 1948
Ralph E. Worden et al. · 1948
