Cellular Effects

MICROWAVE-INDUCED INCREASE OF WATER AND CONDUCTIVITY IN SUBMAXILLARY SALIVARY GLAND OF RATS

Unknown authors

Effect of low-level microwave irradiation on the uptake of horseradish peroxidase by synaptosomes

Unknown authors

EFFECTS OF HIGH STRENGTH 60 HZ ELECTRIC FIELDS ON MYELINATION OF THE OPTIC CHIASM

Unknown authors

The optic chiasm was removed from two groups of 14-day-old Sprague-Dawley rats, one exposed to a 60 Hz 20 kV/m electric field from birth and the other sham-exposed under field-free conditions. The chiasms were sectioned, stained with hematoxylin and eosin, and coded for blind analysis. Myelin sheath area was measured using a light microscope and a Zeiss MOP-2 Digitizer, and group means were compared with a two-tailed t-test.

THE EFFECT OF PULSED, SHORT WAVES ON ALVEOLAR HEALING

Donald R. King, John W. Hathaways, Donald C. Reynolds

Thermal and non-thermal cataractogenesis by microwaves

H. D. Baillie

The study used fifteen adult mongrel dogs exposed to 2.5 GHz microwaves at a power density of 5 W/cm². A single-exposure threshold of 60 seconds was identified at normal body temperature. The authors concluded that microwave cataractogenesis is directly or indirectly a thermal phenomenon.

HYPERTHERMIC AND PATHOLOGIC EFFECTS OF ELECTROMAGNETIC RADIATION (350 Mc)

JOHN E. BOYSEN

EFFECTS OF A.C. MAGNETIC FIELD ON LYMPHOMA CELLS

Unknown authors

In vitro, YAC mouse lymphoma cells were exposed to 130 Gauss, 1950 H for 48 and 96 hours. At 48 hours, cells in the magnetic field increased 31% with 85% viability, while control cells increased 75% with 89% viability. At 96 hours, magnetic field cells increased 149% with 88% viability versus 318% with 84% viability in controls. In vivo, mice injected with YAC lymphoma cells were exposed to 1,000 Gauss, 60 H for 17 days, and the exposed group showed slower tumor onset and lower average tumor weight (2.06 g) than controls (3.1 g).

MODIFICATION OF TAIL PINCH CONSUMMATORY BEHAVIOR BY MICROWAVE ENERGY EXPOSURE

Unknown authors

Thirty male Sprague-Dawley rats averaging 293.7 grams were randomly assigned to three groups. Two groups were exposed to continuous wave microwave energy at 1200 mHz, one at 50 µW/cm² and the other at 125 µW/cm², while a third group received sham exposure. All rats were tested once a day for eight days using a double-blind procedure, and gnawing time, licking time, and total tail pinch time were recorded. Exposed rats showed significantly different response patterns from sham-exposed rats, while the exposed groups responded similarly.

MICROWAVE-INDUCED PRESSURE WAVES IN A MODEL OF BIOLOGICAL TISSUE

Unknown authors

Researchers studied microwave-induced pressure waves in a simulated muscle tissue phantom using a radar transmitter at 5.62 GHz. The pressure waves propagated at approximately 1460 m/s in the phantom, slower than in saline, and a single pulse remained detectable after traveling more than 45 cm with reflection. Attenuation was higher and pressure levels appeared lower in the phantom compared to saline, and the authors suggested that focusing and resonance could occur under certain conditions.

THE EFFECTS OF MILLIMETER WAVE IRRADIATION ON COLICIN INDUCTION

Unknown authors

Colicin production was enhanced only at 5.8 mm (51.7 GHz) at 25°C and 37°C, doubling after 60 minutes at 37°C and 0.5 mW/cm². Plaques observed ranged from .2 to .8 mm in diameter, and small amounts of colicin were also produced in unirradiated colonies.

AN EXPERIMENTAL MODEL FOR DETECTING AND AMPLIFYING SUBTLE RF FIELD-INDUCED CELL INJURIES

Unknown authors

IS THE BLOOD-BRAIN BARRIER ALTERED BY RF IRRADIATION?

Unknown authors

EFFECTS OF 1.07 GHZ RF FIELDS ON MICROBIAL SYSTEMS

Unknown authors

Researchers exposed E. coli C-600 with a tonA defect to 1.07 GHz capacitor-fed fields in Brain Heart Infusion medium. At 42°C the bacteria became susceptible to phage T5 infection, showing nearly complete lysis and virus production when phage was added immediately after exposure. Field exposure of bacteriophage T5 suspended in BHI resulted in 80% inactivation in 2 minutes at 37°C, while the phage is normally stable to temperatures in excess of 480°C. E. coli was more easily inactivated by RF fields than by temperature alone, as 90 minutes at 48°C produced only a minimal reduction in viability.

A NOVEL IN VITRO METHOD FOR STUDY OF THE BIOLOGICAL EFFECTS OF MICROWAVE IRRADIATION

Unknown authors

ELECTROMAGNETIC RADIATION EFFECTS ON THE BLOOD-BRAIN BARRIER SYSTEM OF RATS

Kenneth J. Oscar, T. Daryl Hawkins

Permeability increases were also seen for inulin but not for dextran, and the effect was present immediately and at 4 hours but not at 24 hours after exposure. The magnitude of permeability change depended on microwave modulation, with differences between pulsed and continuous-wave exposures at the same average power density and between different pulse characteristics.

О влиянии электрического поля ультравысокой частоты на окислительные процессы в изолированных клетках

Р. В. Братковский

Brilliant successes in radio engineering revealed ultra-high frequency electric fields as new acting biological factors. The effect of this field on biological structures began relatively recently. However, the accumulated experimental and clinical material proved extensive, diverse, though fragmented.

Human Telecommunications: A review of the Literature on "Biological Radio Communication" and related topics

C. J. Chilton

НЕКОТОРЫЕ ДАННЫЕ О ДЕЙСТВИИ САНТИМЕТРОВЫХ ВОЛН (Экспериментальные исследования)

З. В. Гордон, Е. А. Лобанова, М. С. Тольская

CDRH CURRENT BIOLOGICAL INTRAMURAL PROJECTS (ELECTROMAGNETIC RADIATION BRANCH, DLS, OST)

Unknown authors

SCIENTIFIC LITERATURE EVALUATION GROUP

Roger Budd, Przemyslaw Czerski, LeRoy W. Schroeder

Researchers infected African green monkey kidney cells with herpes simplex virus and exposed them to a pulsed electromagnetic field for varying periods up to 48 hours. After 48 hours, they counted viral plaques and measured plaque size. Two experiments found no statistically significant differences in plaque numbers between exposed and control cultures. An initial suggestion of larger plaques in longer exposures was not confirmed in a second experiment with more uniform cell monolayers. The authors concluded that the screening system did not detect a biological effect of the pulsed electromagnetic field, though the device has been shown to affect immune cell functions in other studies.

LES MILIEUX COLLOIDAUX ET LES ONDES HERTZIENNES DE HAUTE FREQUENCE

Jacques ERRERA

The Dielectric Behavior of Aqueous Solutions of Bovine Serum Albumin from Radio Wave to Microwave Frequencies

Edward H. Grant, Susan E. Keefe, Shin Takashima

The study investigated the dielectric behavior of bovine serum albumin. Measurements were made from 200 MHz to 10,000 MHz at pH values 3.5, 4.5, 7.0, and 8.5 and concentrations ranging from 0.78 to 21%. A dielectric mixture theory was used to estimate the amount of bound water as a function of concentration and pH.

EFFECTS OF 60 HZ ELECTRIC FIELDS ON RODENT ADRENAL TISSUE: IN VITRO AND IN VIVO

Scott N. Ackerman et al.

The in vitro response of adrenal cortical tissue to 60 Hz high intensity electric field exposure was studied. Adrenal glands were removed from male Sprague-Dawley rats and placed in physiological solution. Adrenal cortical tissue was sliced and placed in a superfusion system where corticosterone output was continuously monitored. An electric field exposure system was placed around the tissue at an initial strength of 45 kV/m and regularly incremented. The corticosterone output response to ACTH stimulation was compared between field-on and field-off conditions.

CHANGES IN TEMPORAL ASPECTS OF BEHAVIOR BY LOW LEVELS OF PULSED MICROWAVES

Unknown authors

MODULATION OF PENTOBARBITAL EFFECTS ON TIMING BEHAVIOR IN RATS BY LOW-LEVEL MICROWAVES

Unknown authors

Rats were trained to press a lever on a schedule that rewarded responses spaced 18 to 24 seconds apart. Concurrent 30-minute exposures to 1 mW/cm² or 5 mW/cm² pulsed microwave radiation shifted the maximally effective pentobarbital dose range to 5 to 10 mg/kg. The response mode shifted from 14 to 22 seconds to 10 to 18 seconds, a 25 percent change.