Study type: other

Bioelectromagnetics · 1988 · Manual

A cyclotron resonance model for channel ion transport in weak magnetic fields was extended to include damping losses and used to derive conductivity tensors for different electric-field configurations. Model behavior near the cyclotron resonance frequency was compared to existing Ca2+ efflux data; under an assumption of K+ ions transiting in a 0.35 G field, a collision time of 0.023 s was obtained and a mean kinetic energy of 3.5 eV at resonance was estimated. The model predicts discrete vibrational modes (harmonics) with eigenfrequencies ωn = nωc, stated to be compatible with some prior observations, though noting an exception regarding absence of even modes in those observations.

DOI: 10.1002/bem.2250090104 · PMID: 2449894

Study URL: https://pubmed.ncbi.nlm.nih.gov/2449894/

Study type: in_vitro

Bioelectromagnetics · 1988 · Manual

Calcium-ion efflux from chicken brain tissues was examined across 1–510 Hz (15-Hz intervals) with 15 Vrms/m electric field and 59–69 nTrms magnetic field. Differences in mean efflux between exposed and sham samples did not show readily discernible frequency-response patterns, but analyses of calculated P-values were used to hypothesize three possible frequency-dependent patterns, including significant responses (P<.01) at some frequencies (e.g., at 30-Hz intervals between 15 and 315 Hz with exceptions at 165 Hz; significant results at 60, 90, and 180 Hz but not 300 Hz; and one significant response at 405 Hz).

DOI: 10.1002/bem.2250090303 · PMID: 3178897

Study URL: https://pubmed.ncbi.nlm.nih.gov/3178897/

Study type: in_vitro

Bioelectromagnetics · 1988 · Manual

During exposure to low-power microwaves, the frequency of ACh-activated single-channel openings decreased and the ACh-induced total current showed a faster falling phase. Channel open time and conductance were reported as not affected; the authors conclude microwaves increased desensitization rate and decreased channel opening probability.

DOI: 10.1002/bem.2250090406 · PMID: 2461204

Study URL: https://pubmed.ncbi.nlm.nih.gov/2461204/

Study type: animal

Bioelectromagnetics · 1988 · PubMed

Rats exposed to 2.45 GHz continuous-wave microwave radiation (10 mW/cm2 for 7 h) showed reduced locomotor activity and reduced responsiveness to repeated acoustic startle stimuli compared with sham-exposed animals. Microwave exposure had no effect on retention of a passive avoidance procedure when tested 1 week after training.

DOI: 10.1002/bem.2250090307 · PMID: 3178900

Study URL: https://pubmed.ncbi.nlm.nih.gov/3178900/

Study type: in_vitro

Physiological chemistry and physics and medical NMR · 1988 · PubMed

Across four rodent cell lines and the DNA probes used (oncogenes, heat shock protein, long terminal repeat sequences), no significant differences in mRNA expression were observed between microwave-exposed and sham-exposed samples.

PMID: 3222348

Study URL: https://pubmed.ncbi.nlm.nih.gov/3222348/

Study type: animal

Progress in clinical and biological research · 1988 · PubMed

Rats reduced occupancy of a preferred cage side when occupancy triggered microwave exposure, resulting in reduced exposure. Avoidance/reduced exposure differed by frequency: 360 MHz and 2450 MHz at 1, 2, 6, and 10 W/kg were significantly different from 700 MHz. In semichronic exposures, the threshold for reduced exposure at 2450 MHz was between whole-body SARs of 2.1 and 2.8 W/kg.

PMID: 3344273

Study URL: https://pubmed.ncbi.nlm.nih.gov/3344273/

Study type: animal

Bioelectromagnetics · 1988 · PubMed

In black C57/6J mice with B16 melanoma, low-level 2,450 MHz microwave exposure (1 mW/cm2; SAR 1.2 mW/g) for up to 690 hours showed no significant effects on tumor development or survival compared with controls. No significant differences were observed between continuous-wave and pulsed-wave exposure.

DOI: 10.1002/bem.2250090110 · PMID: 3345211

Study URL: https://pubmed.ncbi.nlm.nih.gov/3345211/

Study type: in_vitro

Biofizika · 1988 · PubMed

In dimyristoyl lecithin liposomes prepared below the phase-transition temperature, annealing induced by 340- and 800-MHz microwave radiation required less integral heating than expected based on thermostat heating experiments.

PMID: 3370244

Study URL: https://pubmed.ncbi.nlm.nih.gov/3370244/

Study type: animal

International journal of radiation biology and related studies in physics, chemistry, and medicine · 1988 · PubMed

Male mice chronically exposed to 2.45 GHz continuous-wave microwaves (100 W m-2; SAR ~4 W/kg) showed no significant differences versus sham controls in pregnancy rate, preimplantation survival, or postimplantation survival. Cytogenetic analysis found no differences in reciprocal translocations or univalents; low levels of fragments/exchanges occurred in both groups, and the authors concluded no evidence of male germ-cell mutagenesis under these conditions.

DOI: 10.1080/09553008814551341 · PMID: 3259564

Study URL: https://pubmed.ncbi.nlm.nih.gov/3259564/

Study type: animal

Biofizika · 1988 · PubMed

Exposure to 460 MHz microwave radiation (SAR 280 W/kg) produced the most significant changes in the K+ transport system of isolated rat erythrocytes, including increased K+ loss during treatment and a 2-fold decrease in the rate of K+ efflux under specified incubation conditions. Similar changes occurred with conventional heating to 39°C for 20 minutes, and the authors conclude the microwave effects were temperature-induced membrane structural changes affecting potassium transport.

PMID: 2465027

Study URL: https://pubmed.ncbi.nlm.nih.gov/2465027/

Hua xi yi ke da xue xue bao = Journal of West China University of Medical Sciences = Huaxi yike daxue xuebao · 1988 · PubMed

PMID: 3253170

Study URL: https://pubmed.ncbi.nlm.nih.gov/3253170/

Study type: other

Journal of neurosurgery · 1988 · PubMed

The report states that microwave irradiation of the spinal cord before removal from the spine provides a rapid and easy method of tissue fixation, with an absence of artifacts comparable to perfusion fixation.

DOI: 10.3171/jns.1988.69.5.0719 · PMID: 3183733

Study URL: https://pubmed.ncbi.nlm.nih.gov/3183733/

Study type: animal

Comparative biochemistry and physiology. A, Comparative physiology · 1988 · PubMed

Hemorrhage increased plasma corticosterone in both sexes; shams had higher corticosterone than controls. In a separate experiment, eggs irradiated during incubation with 2.45 GHz continuous-wave microwaves produced juvenile males that had higher plasma corticosterone after hemorrhage than nonirradiated males, while no irradiation effect was found in females.

DOI: 10.1016/0300-9629(88)91050-x · PMID: 2896572

Study URL: https://pubmed.ncbi.nlm.nih.gov/2896572/

Study type: animal

Comparative biochemistry and physiology. A, Comparative physiology · 1988 · PubMed

Japanese quail eggs exposed in ovo to 2.45 GHz continuous wave microwaves (5 mW/cm2; SAR 4.03 mW/g) during the first 12 days of embryogeny showed no effects on lactate dehydrogenase, beta-glucuronidase, acid phosphatase, glucose, or protein either before or after a 30% blood-volume hemorrhage after hatching. Microwave irradiation during embryogeny affected the response of serum glutamic oxaloacetic transaminase activity to hemorrhagic stress.

DOI: 10.1016/0300-9629(88)90828-6 · PMID: 2899471

Study URL: https://pubmed.ncbi.nlm.nih.gov/2899471/

Study type: animal

Bioelectromagnetics · 1988 · PubMed

Microwave radiation decreased specific camphor binding to a membrane fraction of rat olfactory epithelium, but not to a Triton X-100 extract of the fraction. The inhibition did not depend on modulation frequency (1–100 Hz) and was not a linear function of SAR. The decrease in binding was attributed to shedding/release of the specific camphor-binding protein from the membrane into solution.

DOI: 10.1002/bem.2250090404 · PMID: 3190762

Study URL: https://pubmed.ncbi.nlm.nih.gov/3190762/

Study type: animal

Progress in clinical and biological research · 1988 · PubMed

Neonatal rats exposed to 2.45 GHz continuous-wave microwaves (10 mW/cm2; SAR 2 W/kg) showed nearly twice the number of small deeply stained pyknotic cells in the external granular layer compared with sham controls, along with altered Purkinje cell features (finely dispersed Nissl bodies and disordered RER arrays). Some exposed animals showed mononuclear cellular infiltration; electron microscopy described nuclear and cytoplasmic degenerative changes in pyknotic cells with subsequent phagocytosis.

PMID: 3344268

Study URL: https://pubmed.ncbi.nlm.nih.gov/3344268/

Study type: animal

Progress in clinical and biological research · 1988 · PubMed

The studies reported results consistent with prenatal microwave exposure producing postnatal behavioral changes, particularly affecting sensitivity to thermally related stimuli or conditions rather than thermally neutral stimuli.

PMID: 3344272

Study URL: https://pubmed.ncbi.nlm.nih.gov/3344272/