Willard E. Caldwell, Earl Gaddis, Morton Werber · 1969
Researchers built an Operant Electromagnetic Chamber with a shielded section and an unshielded section, and exposed animals to 8840 mc radio frequency at a power density of 2.2 to 2.5 milliwatts per square inch. No significant difference in shielded-chamber time occurred when the radio frequency was on during the first half of trials, but when it was on during the second half the animals stayed in the shielded area significantly longer with the frequency off (p < .01).
Joseph H. Vogelman · 1969
Unknown authors · 1969
Researchers placed laboratory rats in an irradiation tank circuit to test their tolerance to radiation at 6, 14, and 21 MHz. The tests showed harmful effects to the gastrointestinal, cardiovascular, respiratory, and genito-urinary systems, peaking at 35 days after irradiation. No changes were detected in the endocrine system of the test animals.
William Walden Mumford · 1969
Janet Healer, Robert Smiley · 1969
Stephen Herrero · 1969
Ulrich H. Behling · 1969
Zorach R. Glaser, Christopher H. Dodge · 1969
The review compared Soviet and East European literature with Western literature and found a major disagreement over whether nonthermal effects occur below 10 mW/cm2. Occupational exposure standards reflected this divide, with the Soviet limit at 0.01 mW/cm2 and the U.S. limit at 10 mW/cm2 for continuous exposure. Western research was beginning to investigate effects below 10 mW/cm2, but the review noted persistent dosimetry and control-group problems in epidemiological studies.
Dumanski, I IuD · 1968
B.G. AFANAS-YEV, I.M. Suvorov · 1968
Researchers studied 38 radio operators with 200 to 1800 hours of exposure and 22 controls under similar conditions. They assessed adrenal cortex function by measuring urinary 17-ketosteroids, 17-oxycorticosteroids, and sodium-potassium ratio. No reliable difference was found in sodium-potassium coefficient between exposed and control groups. Steroid excretion did not differ between operators with more than 300 hours and less than 200 hours of exposure. The androgenic, glucocorticoid, and mineralocorticoid functions of the adrenal cortex did not differ from the norm in the persons who were investigated.
A. M. Kadoum, S. O. Nelson, L. E. Stetson · 1967
Ahmed M. Kadoum, Harold J. Ball, LaVerne E. Stetson · 1967
Smurova, Ye. J. · 1967
A. M. Kadoum, H. J. Ball, S. O. Nelson · 1967
Researchers exposed yellow mealworm larvae to radiofrequency electric fields at sublethal levels and observed the resulting adults. Exposures during the sixth instar caused leg malformations and absences, while fifth-instar exposures did not affect leg development. Longer exposure times reduced the number of imaginal legs that developed, and exposures later in the last instar caused more severe damage.
Gopal P. Kamat, David E. Janes · 1966
Susan Korbel · 1966
In a 20-day experiment, rats receiving 60 minutes of daily radiation were significantly less active than controls during the final four days. At a higher audiogenic seizure test intensity of 140 db, exposed rats had lower seizure thresholds and longer seizure durations. Older rats needed 7 to 12 extra days for effects to appear, lower frequencies had greater impact on activity, and effects persisted for four to six days after exposure stopped.
Glenn Heimer · 1966
Shiro Takashima · 1966
Researchers irradiated alcohol dehydrogenase at 200 volts peak-to-peak across frequencies from 1 to 60 Mc/s. Enzyme activity was measured by the rate of DPN reduction, while DNA structure was assessed by optical density at 260 mu and viscosity. Optical density and viscosity of irradiated DNA showed no significant difference from control samples. The ratio of the first-order rate constant for irradiated versus control alcohol dehydrogenase was nearly unity, indicating no change in activity.
Goncharova NN, Karamyshev VB, Maksimenko NV · 1966
E. T. Fago, Jr. · 1966
Hendenius P., Odeblad E., Wahlstrom L. · 1966
Eighteen claudication patients received pulsed 27.12 Mc/sec RF treatments at 38 watts average power over an 80 cm* epigastric area, each treatment lasting 20 minutes. Walking distance improved by an average of 124 meters (p<0.001).
Robert E. Stowell, Glenn C. Faith, Joe L. Griffin · 1966
Laser irradiation of mouse liver caused histologic disruption and mitochondrial staining loss, while Physarum polycephalum showed central coagulation and peripheral cytoplasmic gelation. Freezing and thawing mouse liver diminished all measured nuclear metabolic activities, with rapid thawing causing greater impairment than slow thawing.
Nelson, Stuart O. · 1966
Gamma and x radiation eradicated screwworm and melon fly through reproductive sterilization. Insect light traps controlled tobacco hornworm populations. Grain beetles were killed by y rays, radiofrequency electric fields, or infrared radiation without harming grain nutrition. The possibility of using sound and ultrasonic energy to control insect population age was suggested.
Faitel'berg-Blank, V. · 1965
Yu. A. Osipov · 1965
