Study type: other

Bioelectromagnetics · 1997 · Manual

The paper considers a theoretical possibility that DC magnetic fields could interact resonantly with endogenous AC electric fields in biological systems via intrinsic electric-field ion cyclotron resonance (ICR). It argues such intrinsic ICR interactions may be more physically credible than models based on external AC magnetic fields.

PMID: 9125238

Study URL: https://pubmed.ncbi.nlm.nih.gov/9125238/

Study type: animal

Bioelectromagnetics · 1997 · Manual

A progressive decrease in the number of newborns per dam was observed, ending in irreversible infertility. Prenatal development measures of newborns were improved.

DOI: 10.1002/(sici)1521-186x(1997)18:6<455::aid-bem8>3.0.co;2-1 · PMID: 9261543

Study URL: https://pubmed.ncbi.nlm.nih.gov/9261543/

Study type: animal

Chirurgia narzadow ruchu i ortopedia polska · 1997 · PubMed

In rats receiving intraperitoneal hydrocortisone hemisuccinate for 12 weeks, concomitant microwave irradiation at two power densities was reported to have a protective effect on bone tissue exposed to corticotherapy.

PMID: 9273257

Study URL: https://pubmed.ncbi.nlm.nih.gov/9273257/

Study type: in_vitro

Bioelectromagnetics · 1997 · PubMed

HeLa cells exposed for 2 h to continuous-wave 27 or 2450 MHz radiation at SAR 25 W/kg and CHO cells exposed for 2 h to continuous-wave 27 MHz radiation at SAR 100 W/kg showed no detectable effect on stress protein induction compared with sham exposure under isothermal conditions. Positive controls (40°C heat exposure or 45 µM cadmium sulfate) produced expected stress protein responses in both cell types.

DOI: 10.1002/(sici)1521-186x(1997)18:7<499::aid-bem5>3.0.co;2-y · PMID: 9338631

Study URL: https://pubmed.ncbi.nlm.nih.gov/9338631/

Study type: exposure_assessment

Health physics · 1997 · PubMed

A calibration study evaluated the receiving aperture efficiency of a 1-m antenna on a narrow-band electric field strength meter centered at 27.12 MHz. The reported aperture efficiency was 0.47 with a coefficient of variation of +/-3.46%, considered adequate for field use.

DOI: 10.1097/00004032-199702000-00018 · PMID: 9003720

Study URL: https://pubmed.ncbi.nlm.nih.gov/9003720/

Study type: review

Reproductive toxicology (Elmsford, N.Y.) · 1997 · PubMed

In rat prenatal exposure studies at nonhyperthermal power density levels, 915 MHz exposure showed no consistent significant alterations across assessed teratologic or behavioral parameters. 2450 MHz exposure was associated with significantly increased adult offspring activity level. 6000 MHz exposure was associated with slight but significant term weight retardation, reduced maternal monocyte count, transiently lower weekly offspring weights (recovered by week 5), delayed eye opening, and changes in some behavioral tests and organ/body weight ratios; authors describe these as potentially subtle long-term neurophysiologic alterations. Overall, the review concludes no consistent, significant increase in reproductive risk under nonhyperthermic conditions for the tested microwave frequencies (including those used in cellular phones and microwave ovens).

DOI: 10.1016/s0890-6238(97)89179-4 · PMID: 9241682

Study URL: https://pubmed.ncbi.nlm.nih.gov/9241682/

Study type: in_vitro

FEBS letters · 1997 · PubMed

Two thermophilic enzymes (S-adenosylhomocysteine hydrolase and 5'-methylthioadenosine phosphorylase) exposed to 10.4 GHz microwave radiation showed non-thermal, irreversible, time-dependent inactivation. The inactivation rate was related to absorbed energy and independent of enzyme concentration; conformational changes detected by fluorescence and circular dichroism suggested microwave-induced structural rearrangements not related to temperature.

DOI: 10.1016/s0014-5793(96)01505-0 · PMID: 9037175

Study URL: https://pubmed.ncbi.nlm.nih.gov/9037175/

Study type: in_vitro

Bioelectromagnetics · 1997 · PubMed

Rat tendon fibroblast and rat bone marrow osteoprogenitor cells exposed in vitro to AC (60 or 1000 Hz, up to 0.25 mT peak-to-peak) and/or DC (up to 0.25 mT) magnetic fields showed extensive detachment of preattached cells and impaired attachment of previously unattached cells, with altered morphology. Appendix experiments corroborated these findings and reported initiation of apoptosis at the onset of cell detachment; partial reattachment and more normal morphology occurred after removal from fields.

DOI: 10.1002/(sici)1521-186x(1997)18:3<264::aid-bem10>3.0.co;2-p · PMID: 9096845

Study URL: https://pubmed.ncbi.nlm.nih.gov/9096845/

Study type: case_control

Bioelectromagnetics · 1997 · PubMed

Occupational EMF exposure was classified (low to high) and summarized as total (E1) and average (E2) exposure indices. Among participants with ≥20 years of work experience, odds ratios comparing the 75th percentile of case exposure (vs minimum exposure) were 7.5 for E1 (P<0.02; 95% CI 1.4–38.1) and 5.5 for E2 (P<0.02; 95% CI 1.3–22.5). In the full sample, ORs were 2.5 for E1 (P<0.1; 95% CI 0.9–8.1) and 2.3 for E2 (P=0.12; 95% CI 0.8–6.6).

DOI: 10.1002/(sici)1521-186x(1997)18:1<28::aid-bem6>3.0.co;2-7 · PMID: 9125230

Study URL: https://pubmed.ncbi.nlm.nih.gov/9125230/

Study type: randomized_trial

Medycyna pracy · 1997 · PubMed

Mean arterial blood pressure and the day/night blood pressure variability indicator showed no significant differences between groups. Daily heart rate was significantly lower in middlewave broadcast station workers versus controls, and the day/night heart rate variability indicator was significantly lower in exposed groups. A higher incidence of increased arterial blood pressure was observed in radioservice workers compared with controls.

PMID: 9198713

Study URL: https://pubmed.ncbi.nlm.nih.gov/9198713/

Study type: in_vitro

Journal of environmental pathology, toxicology and oncology : official organ of the International Society for Environmental Toxicology and Cancer · 1997 · PubMed

Exposure of Akata cells latently infected with EBV to a 50 Hz electromagnetic field increased the number of cells expressing EBV early antigens.

PMID: 9276003

Study URL: https://pubmed.ncbi.nlm.nih.gov/9276003/

Study type: animal

Bioelectromagnetics · 1997 · PubMed

Across three independent experiments, constant exposure to EMFs emitted by video display units (TV or computer) was associated with significantly increased fetal loss (47–68%) compared with sham exposure (10–33%). Exposed young chickens also showed markedly depressed circulating anti-Tg IgG, corticosterone, and melatonin levels relative to sham-exposed samples.

PMID: 9338633

Study URL: https://pubmed.ncbi.nlm.nih.gov/9338633/

Study type: in_vitro

Life sciences · 1997 · PubMed

Purified human hematopoietic progenitor cells exposed to 50 Hz sinusoidal magnetic fields (10 microT or 1 mT) showed no significant changes in proliferation, cell kinetics, ultrastructure, or clonogenic potential that could be related to a leukemogenic effect.

DOI: 10.1016/s0024-3205(97)00833-3 · PMID: 9364198

Study URL: https://pubmed.ncbi.nlm.nih.gov/9364198/

Study type: in_vitro

Bioelectromagnetics · 1997 · PubMed

PBMC proliferative responses (both unstimulated and phytohemagglutinin-stimulated) were not distinguishable from unexposed controls after short-cycle static and pulsed EMF exposure. IL-2, IFN-γ, and TNF-α increased during the first 48 hours of incubation but remained unchanged relative to controls, indicating no significant EMF effect under these conditions.

DOI: 10.1002/(sici)1521-186x(1997)18:8<548::aid-bem3>3.0.co;2-2 · PMID: 9383243

Study URL: https://pubmed.ncbi.nlm.nih.gov/9383243/

Study type: case_control

Cancer causes & control : CCC · 1997 · PubMed

In this population-based case-control study, children exposed to >0.2 microT had an elevated but not statistically significant odds ratio for leukemia (OR 3.2, 95% CI 0.7–14.9), based on 4 cases and 3 controls in the high-exposure category. Exploratory analyses using other magnetic-field characteristics and cut-points did not show statistically significant increases.

DOI: 10.1023/a:1018464012055 · PMID: 9134240

Study URL: https://pubmed.ncbi.nlm.nih.gov/9134240/

Study type: other

Cancer biochemistry biophysics · 1997 · PubMed

In an AOT reverse-micelle model, low-intensity microwave-field perturbation produced a similar inhibitory effect on enzyme reactions as observed in dilute-solution reactions, though interactions between physical (microwave) and chemical perturbants were differently limited by the reverse-micelle aqueous-phase structure. Some acetylcholinesterase inhibitors had much less effect in reverse micelles than in dilute solution, while others acted similarly in both environments; internal pH control in reverse micelles was described as variable and buffer-limited.

PMID: 9224560

Study URL: https://pubmed.ncbi.nlm.nih.gov/9224560/

Study type: animal

Reviews on environmental health · 1997 · PubMed

In rats exposed to a 50 Hz, 10 mT EMF, pre-exposure or post-exposure produced small but significant changes in retention of ionic 210Po: pre-exposure decreased skin retention by 28% and total retention in investigated tissues by 10%, while post-exposure increased retention by 131% in the thymus only. For carrier-free ionic 234Th, both pre- and post-exposure increased retention in liver and spleen and decreased retention in bones. When 232Th carrier (50 micrograms/kg body mass) was added, pre-exposure decreased liver retention of 234Th by 10%, whereas post-exposure produced no significant tissue retention changes.

DOI: 10.1515/reveh.1997.12.3.171 · PMID: 9406288

Study URL: https://pubmed.ncbi.nlm.nih.gov/9406288/

Study type: review

Radiatsionnaia biologiia, radioecologiia · 1997 · PubMed

The paper compiles references on EMF sources affecting humans and, considering scientific data on radiobiological non-ionizing radiation, provides an estimate of electromagnetic danger for people.

PMID: 9599631

Study URL: https://pubmed.ncbi.nlm.nih.gov/9599631/

Study type: in_vitro

Biochimica et biophysica acta · 1997 · PubMed

Raji cells exposed for 72 h to a 50 Hz, 2 mT (rms) sinusoidal magnetic field showed decreased membrane fluidity, reorganization of cytoskeletal components, and loss of microvilli on SEM with altered actin distribution. The authors also report evidence that exposure can interfere with protein phosphorylation.

DOI: 10.1016/s0167-4889(97)00032-3 · PMID: 9268052

Study URL: https://pubmed.ncbi.nlm.nih.gov/9268052/

Study type: in_vitro

International journal of radiation biology · 1997 · PubMed

EMF exposure (50 Hz, 100 microTrms, with an artificial geomagnetic-like static field) showed no significant direct effect on micronucleus induction in rat tracheal cell lines. An increased frequency of binucleated cells with micronuclei was observed in cells exposed to 6 Gy gamma rays plus EMF compared with gamma irradiation alone.

DOI: 10.1080/095530097143473 · PMID: 9269318

Study URL: https://pubmed.ncbi.nlm.nih.gov/9269318/

Study type: case_report

The International journal of neuroscience · 1997 · PubMed

After a 20-minute extracranial picotesla-range EMF treatment, the child’s unusual visuoconstructional drawing (bird’s-eye view bicycle) was reported to reverse spontaneously to an elaborate bicycle in profile. A placebo EMF treatment administered prior to magnetic therapy reportedly had no effect. Over the ensuing week, hyperactive behavior was markedly reduced with attenuation of motor tics; at one week the bicycle drawing remained in profile though some elements were still bird’s-eye view.

DOI: 10.3109/00207459709000635 · PMID: 9352424

Study URL: https://pubmed.ncbi.nlm.nih.gov/9352424/

Study type: animal

Mutagenesis · 1997 · PubMed

In mice treated with vinblastine sulphate (VBS), EMF exposure during oogenesis significantly increased the incidence of VBS-induced hyperploidy (P < 0.05). EMF exposure had no effect on the number of oocytes ovulated and no effect on hypoploidy; the data suggested the effect was primarily in mice with a high baseline incidence of VBS-induced hyperploidy.

DOI: 10.1093/mutage/12.5.347 · PMID: 9379913

Study URL: https://pubmed.ncbi.nlm.nih.gov/9379913/

Study type: in_vitro

FEBS letters · 1997 · PubMed

A 1.8 mT bone-healing electromagnetic field and 60 Hz power-frequency fields at 0.1 and 0.4 mT significantly inhibited DNA synthesis ([3H] thymidine uptake) in otherwise unstimulated Jurkat cells. Inhibition was most prominent in mid log phase cells, with ~50% inhibition reported for the bone-healing EMF in complete medium versus ~20–25% for 60 Hz fields; cells in conditioned medium showed up to ~60% inhibition. The 0.1 and 0.4 mT 60 Hz effects were reported as very similar, suggesting saturation at 0.1 mT or lower.

DOI: 10.1016/s0014-5793(97)01060-0 · PMID: 9323024

Study URL: https://pubmed.ncbi.nlm.nih.gov/9323024/

Study type: in_vitro

Environmental health perspectives · 1997 · PubMed

Commercial crocidolite asbestos fibers irradiated with microwave radiation at different temperatures showed a reduced total Fe2+/Fe3+ ratio compared with nonirradiated fibers. This reduction was accompanied by a decreased ability of the irradiated samples to peroxidize linoleic acid.

DOI: 10.1289/ehp.97105s51041 · PMID: 9400697

Study URL: https://pubmed.ncbi.nlm.nih.gov/9400697/

Study type: engineering

Magnetic resonance in medicine · 1997 · PubMed

Using a finite-element method in a 2D birdcage-coil/2D human-head model at 64, 128, 171, and 256 MHz, SAR increased significantly with frequency for the same B1 field. For the same imaging method, SAR from a quadrature coil was significantly lower than from a linear coil, and B1-field inhomogeneity increased significantly with frequency.

DOI: 10.1002/mrm.1910380615 · PMID: 9402197

Study URL: https://pubmed.ncbi.nlm.nih.gov/9402197/

Study type: case_report

Journal of neurosurgery · 1997 · PubMed

Among 42 patients (50 pallidotomies), three patients experienced delayed postoperative strokes on Days 10, 51, and 117. The infarctions were ipsilateral to the pallidotomy site and appeared as high-intensity signals extending to the posterior limb of the internal capsule on T2-weighted MRI; authors suggest RF lesioning can induce delayed injury in adjacent tissue, particularly in patients with prior vasculopathy.

DOI: 10.3171/jns.1997.87.6.0955 · PMID: 9384411

Study URL: https://pubmed.ncbi.nlm.nih.gov/9384411/

Study type: in_vitro

Biofizika · 1997 · PubMed

Weak electromagnetic fields applied to aqueous solutions of polar amino acids were associated with formation of stable products of an amino acid condensation reaction, with defined amino acid composition and HPLC retention times.

PMID: 9410025

Study URL: https://pubmed.ncbi.nlm.nih.gov/9410025/

Study type: animal

Biofizika · 1997 · PubMed

Low-intensity EHF electromagnetic radiation affected the synergistic activation of respiratory burst in mouse peritoneal neutrophils in a frequency- and modulation-dependent manner. Continuous EHF EMR (50 microW/cm2) inhibited the synergistic reaction with a maximum effect of about 25% at a carrier frequency of 41.95 GHz. With a 41.95 GHz carrier, 1 Hz modulation activated the reaction, while 0.1, 16, and 50 Hz modulation inhibited it; at 1 Hz modulation, activation occurred at 41.95–42.05 GHz and inhibition at 41.8–41.9 GHz.

PMID: 9410041

Study URL: https://pubmed.ncbi.nlm.nih.gov/9410041/

Study type: other

Biophysical journal · 1997 · PubMed

Presents a theory to estimate dendritic electrotonic length constant and membrane time constant from transmembrane potential induced by an applied DC electric field in morphologically defined neurons. In 11 turtle spinal motoneurons, field-based tip-to-tip electrotonic length estimates were 1–2.5 lambda versus 0.9–1.1 lambda from classical current-pulse injection; in seven ventral horn interneurons, estimates were 0.7–2.6 lambda versus 0.6–0.9 lambda, respectively. The authors suggest field-induced polarization measurements could complement conventional microelectrode stimulation methods.

DOI: 10.1016/s0006-3495(97)78329-2 · PMID: 9414215

Study URL: https://pubmed.ncbi.nlm.nih.gov/9414215/

Study type: in_vitro

International journal of radiation biology · 1997 · PubMed

No significant differences were observed between 2450 MHz RFR-exposed and sham-exposed lymphocytes for mitotic indices, chromosomal damage measures, binucleate lymphocytes, or micronuclei after either continuous or intermittent exposure. Positive control (150 cGy gamma radiation) showed significant effects compared with RFR and sham.

DOI: 10.1080/095530097142915 · PMID: 9416798

Study URL: https://pubmed.ncbi.nlm.nih.gov/9416798/

Study type: other

Revista espanola de cardiologia · 1997 · PubMed

In 30 patients tested with GSM mobile phones placed in close contact with the defibrillator can and precordium under several call conditions, no electromagnetic interference was observed. One patient had non-sustained ventricular tachycardia during testing that was detected by the defibrillator.

DOI: 10.1016/s0300-8932(97)73287-1 · PMID: 9417561

Study URL: https://pubmed.ncbi.nlm.nih.gov/9417561/

Study type: other

Cell growth & differentiation : the molecular biology journal of the American Association for Cancer Research · 1997 · PubMed

In Hut-78 lymphocytes, Pim-1 protein expression did not increase after PMA/ionomycin stimulation despite ~20-fold increases in Pim-1 mRNA, suggesting translational repression. Deleting the Pim-1 5'-UTR increased translation ~10-fold in vitro (reticulocyte lysates) and ~1.6-fold in vivo (NIH-3T3 cells). In NIH-3T3 cells overexpressing eIF-4E, full-length 5'-UTR-containing Pim-1 constructs produced ~6-fold higher Pim-1 protein than controls, while eIF-4E had little effect without the 5'-UTR, consistent with relief of 5'-UTR-mediated inhibition.

PMID: 9419425

Study URL: https://pubmed.ncbi.nlm.nih.gov/9419425/

Study type: cohort

American journal of epidemiology · 1997 · PubMed

Adjusted mean Beck Depression Inventory scores did not differ by exposure to overhead 110- to 400-kV power lines (distance and calculated annual average magnetic fields). The risk of severe depression was increased 4.7-fold (95% CI 1.70–13.3) among subjects living within 100 m of a high-voltage power line, but this was based on small numbers.

DOI: 10.1093/oxfordjournals.aje.a009232 · PMID: 9420528

Study URL: https://pubmed.ncbi.nlm.nih.gov/9420528/

Study type: other

BioTechniques · 1997 · PubMed

A method using stringent hybridization to an immobilized probe followed by dissociation and amplification, repeated twice, retrieved target sequences with one or two point mutations present at very low frequencies (1 in 466×10^3 and 1 in 28×10^3 molecules). The authors report estimated enrichment of 404,000-fold and 1,612-fold, confirmed by cloning and sequencing 35 clones.

DOI: 10.2144/97236rr02 · PMID: 9421644

Study URL: https://pubmed.ncbi.nlm.nih.gov/9421644/

Study type: animal

The Japanese journal of veterinary research · 1997 · PubMed

T1-weighted MR images acquired under a 7.05 T magnetic field showed age-related liver signal patterns in LEC rats: low signal intensity at 3 months, hyperintense regions around hepatic veins at 12 months (assigned to hepatocellular carcinoma), and hyperintensity throughout the hepatic lobe at 29 months. The imaging findings suggested HCC developed from restricted regions surrounding hepatic veins and that 7.05 T T1-weighted MRI was applicable for diagnosing hepatic cancer in this rat model.

PMID: 9433015

Study URL: https://pubmed.ncbi.nlm.nih.gov/9433015/

Study type: other

Voprosy kurortologii, fizioterapii, i lechebnoi fizicheskoi kultury · 1997 · PubMed

Patients with cervical osteochondrosis were reported to be successfully treated using sapropel mud in combination with exposure to a magnetic field. The combination was described as beneficial.

PMID: 9446301

Study URL: https://pubmed.ncbi.nlm.nih.gov/9446301/

Study type: review

Voprosy kurortologii, fizioterapii, i lechebnoi fizicheskoi kultury · 1997 · PubMed

The author reports subcellular adaptive reactions in response to electromagnetic radiation, with activation of hyperplastic processes described as a leading structural-adaptive response involving accelerated renewal of ultrastructures. Adaptive hyperplasia is described in bioenergetic and protein-synthesizing organelles across cells of different organs, while high intensities are emphasized to provoke destructive processes.

PMID: 9446304

Study URL: https://pubmed.ncbi.nlm.nih.gov/9446304/

Study type: other

Perceptual and motor skills · 1997 · PubMed

Electromagnetic equivalents (~1 microT) of spoken words applied across the temporoparietal lobes were associated with more frequent selection of the target word or words sharing its emotional dimensions in the exposed group (n=7) compared with a reference group (n=6) that received no electromagnetic equivalents.

DOI: 10.2466/pms.1997.85.3f.1411 · PMID: 9450301

Study URL: https://pubmed.ncbi.nlm.nih.gov/9450301/

Study type: other

Brain research. Cognitive brain research · 1997 · PubMed

In 10 normal subjects, four main SEF components (1M(P)–4M(P)) were identified contralateral to passive finger movement, with ECDs localized around the finger area of primary sensorimotor cortex; an ipsilateral component (4M(PI)) was localized to the upper bank of the sylvian fissure (probably SII). Following electrical stimulation, five corresponding components (1M(E)–4M(E) and 4M(EI)) were identified. SEFs after passive movement differed from those after electrical stimulation in waveform and source location, attributed to differences in ascending fibers and receptive fields.

DOI: 10.1016/s0926-6410(97)00017-7 · PMID: 9450601

Study URL: https://pubmed.ncbi.nlm.nih.gov/9450601/

Study type: randomized_trial

Pain · 1997 · PubMed

In a randomized prospective double-blinded study (n=61), both 67°C and 40°C radiofrequency dorsal root ganglion treatments showed significant VAS pain reduction at 3 months. The magnitude of VAS reduction was similar between groups (1.7 vs 1.9), and responder proportions (VAS reduction ≥3 or ≥2) were comparable.

DOI: 10.1016/s0304-3959(97)00094-8 · PMID: 9415501

Study URL: https://pubmed.ncbi.nlm.nih.gov/9415501/

Study type: other

Pacing and clinical electrophysiology : PACE · 1997 · PubMed

Lesion dimensions, temperature, and impedance changes were evaluated across electrode-tissue contact levels (-5, 0, +1, +3 mm) and power levels (10, 20, 30 W). Greater electrode-tissue contact produced larger temperature rises and larger/faster impedance decreases; lesion diameter and depth correlated with increasing temperature and decreasing impedance, with lesion depth reported to correlate better with impedance than temperature. The authors recommend starting at low power and increasing slowly over 20–30 seconds, maintaining final power for at least 90 seconds, and lowering power if impedance drop exceeds 15 ohms.

DOI: 10.1111/j.1540-8159.1997.tb05458.x · PMID: 9455749

Study URL: https://pubmed.ncbi.nlm.nih.gov/9455749/

Gigiena i sanitariia · 1997 · PubMed

PMID: 9378358

Study URL: https://pubmed.ncbi.nlm.nih.gov/9378358/

Study type: engineering

Meditsinskaia tekhnika · 1997 · PubMed

The paper analyzes advantages and shortcomings of devices that record external respiration parameters and describes the spirotachoanalyzer "Elf-Laspec-01". It reports that an original thermoanemometer gauge provides high measurement accuracy and that software and a built-in database extend functionality (e.g., comparative analysis and fast record search).

PMID: 9460669

Study URL: https://pubmed.ncbi.nlm.nih.gov/9460669/

Study type: in_vitro

Mutation research · 1997 · PubMed

Human peripheral lymphocytes incubated with high-frequency electromagnetic fields at 380, 900, and 1800 MHz showed no differences from control cultures in cell cycle progression or sister-chromatid exchange frequencies.

DOI: 10.1016/s1383-5718(97)00173-3 · PMID: 9465932

Study URL: https://pubmed.ncbi.nlm.nih.gov/9465932/

Study type: review

Environmental health perspectives · 1997 · PubMed

The article argues that radiofrequency currents used for communications/remote control can be present on high- and medium-voltage power lines (and sometimes on the main system for remote meter reading), implying concurrent RF magnetic-field exposure near electric networks in addition to 50/60 Hz fields. It suggests RF magnetic fields should be considered as a potential concurrent exposure in epidemiologic studies of leukemia/cancer near power lines, noting uncertainty about whether risk relates to magnetic induction levels or induced currents in the body.

DOI: 10.1289/ehp.97105s61569 · PMID: 9467084

Study URL: https://pubmed.ncbi.nlm.nih.gov/9467084/

Study type: in_vitro

Comparative biochemistry and physiology. Part C, Pharmacology, toxicology & endocrinology · 1997 · PubMed

Exposure to an extremely low frequency magnetic field (60 Hz, 10 Grms) facilitated neurite outgrowth and promoted formation of neurite varicosities with high catecholamine concentration in cultured rat chromaffin cells. A greater number of ELF-MFdifferentiated cells showed spontaneous extracellular electrical activity, and firing frequency was higher than in non-stimulated cells.

DOI: 10.1016/s0742-8413(97)00165-5 · PMID: 9467881

Study URL: https://pubmed.ncbi.nlm.nih.gov/9467881/

Study type: randomized_trial

Neuroscience letters · 1997 · PubMed

In a randomized, blind, crossover, sham-controlled study of 62 volunteers, a vertically applied alternating 3 Hz magnetic field (0.1 mT) for 20 minutes produced statistically significant differences versus sham in occipital EEG relative spectral amplitudes in the theta and beta bands and in the theta/beta ratio (two-tailed P < 0.05). The authors interpret these EEG changes as indicating a more pronounced reduction of alertness during real-field exposure compared with control.

DOI: 10.1016/s0304-3940(97)00881-1 · PMID: 9469655

Study URL: https://pubmed.ncbi.nlm.nih.gov/9469655/

Study type: other

Australian and New Zealand journal of public health · 1997 · PubMed

In a case study of media reporting on a successful resident protest about transmitters placed adjacent to a kindergarten, protesters voiced uncertain health risks as the main concern. Eleven of 12 primary and six of eight secondary components of Sandman's outrage model were consistent with both protesters' expressed concerns and how the media framed the issues.

DOI: 10.1111/j.1467-842x.1997.tb01765.x · PMID: 9470268

Study URL: https://pubmed.ncbi.nlm.nih.gov/9470268/

Study type: other

Minerva chirurgica · 1997 · PubMed

In 60 patients with IV degree hemorrhoids treated with submucosal hemorrhoidectomy by radiosurgery (radiofrequency bistoury), the authors report good results.

PMID: 9471582

Study URL: https://pubmed.ncbi.nlm.nih.gov/9471582/

Study type: exposure_assessment

Scandinavian journal of work, environment & health · 1997 · PubMed

Using present-day measurements plus interviews to extrapolate past task/location intensities and durations, the authors reconstructed past TWA exposures for 14 utility job categories. Estimated magnetic-field exposures increased most over time for substation and distribution-line jobs (1945:1990 B-field ratios 0.42–0.69 for substation jobs; 0.36–0.94 for distribution-line jobs), while generation and transmission jobs changed little. Electric-field increases in substations were smaller than for magnetic fields (1945:1990 ratios 0.59–0.88); for distribution-line jobs, electric-field ratios were <1.0 in four cases (0.6–0.89), >1.0 in three (1.13–2.01), and unchanged in one.

DOI: 10.5271/sjweh.267 · PMID: 9476808

Study URL: https://pubmed.ncbi.nlm.nih.gov/9476808/