scholarly journals 2-5G electromagnetic field chronic exposure biological effects assessment

2021 ◽  
Author(s):  
Nina Rubtsova ◽  
Sergey Perov ◽  
Olga Belay
Keyword(s):  
Electromagnetic Field ◽  
Chronic Exposure ◽  
Biological Effects ◽  
Effects Assessment

scholarly journals Biological Effects of a Low-Frequency Electromagnetic Field on Yeast Cells of the Genus Saccharomyces Cerevisiae

2021 ◽  
Vol 21 (2) ◽  
pp. 34-41
Author(s):  
K Sladicekova ◽  
M Bereta ◽  
J Misek ◽  
D Parizek ◽  
J Jakus
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Electromagnetic Field ◽  
Magnetic Flux ◽  
Flux Density ◽  
Biological Effects ◽  
Low Frequency ◽  
Growth Dynamics ◽  
Yeast Cells ◽  
Magnetic Flux Density ◽  
Time Points

Abstract Background: Although the scientific community is extensively concerned with the effects of the EMF, the unambiguous explanation of its effects on living structures is still lacking. Goals: The goal of the study was to evaluate the effect of a low-frequency (LF) electromagnetic field (EMF) on the growth and multiplication of the yeast Saccharomyces cerevisiae. Methods: Yeast cells were exposed to a frequency of 900 Hz and a magnetic flux density of 2.3 mT. The duration of each experiment was 8 hours, in the beginning of the measurement the value of frequency, rms (root mean square) value of electric current (2 A), and magnetic flux density were fixed set on the exposure device. A paired experiment was performed, a sample exposed to EMF, and a sample shielded from the field. Subsequently, samples were taken every two hours, the number of cells was recorded, and then the concentration of the yeast cells was evaluated at time points. The time points reflected the exposure time of the samples exposed to EMF. Results: The results indicate that LF EMF at given parameters has an inhibitory effect on the growth and multiplication of yeast cells. Conclusion: Exposure to EMF can cause the differences in growth dynamics between cells exposed to the field and the unexposed ones.

GFAP expression in the rat brain following sub-chronic exposure to a 900 MHz electromagnetic field signal

2010 ◽  
Vol 86 (5) ◽  
pp. 367-375 ◽  
Author(s):  
Mohamed Ammari ◽  
Christelle Gamez ◽  
Anthony Lecomte ◽  
Mohsen Sakly ◽  
Hafedh Abdelmelek ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Rat Brain ◽  
Chronic Exposure ◽  
Gfap Expression ◽  
900 Mhz Electromagnetic Field

scholarly journals A systems biology approach reveals neuronal and muscle developmental defects after chronic exposure to ionising radiation in zebrafish

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Sophia Murat El Houdigui ◽  
Christelle Adam-Guillermin ◽  
Giovanna Loro ◽  
Caroline Arcanjo ◽  
Sandrine Frelon ◽  
...  
Keyword(s):  
Chronic Exposure ◽  
Nuclear Power ◽  
Muscle Development ◽  
Low Dose ◽  
Neuromuscular Junctions ◽  
Biological Effects ◽  
Cardiac Activity ◽  
Developmental Defects ◽  
Dose Rates ◽  
Larval Behaviour

AbstractContamination of the environment after the Chernobyl and Fukushima Daiichi nuclear power plant (NPP) disasters led to the exposure of a large number of humans and wild animals to radioactive substances. However, the sub-lethal consequences induced by these absorbed radiological doses remain understudied and the long-term biological impacts largely unknown. We assessed the biological effects of chronic exposure to ionizing radiation (IR) on embryonic development by exposing zebrafish embryo from fertilization and up to 120 hours post-fertilization (hpf) at dose rates of 0.5 mGy/h, 5 mGy/h and 50 mGy/h, thereby encompassing the field of low dose rates defined at 6 mGy/h. Chronic exposure to IR altered larval behaviour in a light-dark locomotor test and affected cardiac activity at a dose rate as low as 0.5 mGy/h. The multi-omics analysis of transcriptome, proteome and transcription factor binding sites in the promoters of the deregulated genes, collectively points towards perturbations of neurogenesis, muscle development, and retinoic acid (RA) signaling after chronic exposure to IR. Whole-mount RNA in situ hybridization confirmed the impaired expression of the transcription factors her4.4 in the central nervous system and myogenin in the developing muscles of exposed embryos. At the organ level, the assessment of muscle histology by transmission electron microscopy (TEM) demonstrated myofibers disruption and altered neuromuscular junctions in exposed larvae at 5 mGy/h and 50 mGy/h. The integration of these multi-level data demonstrates that chronic exposure to low dose rates of IR has an impact on neuronal and muscle progenitor cells, that could lead to motility defects in free swimming larvae at 120 hpf. The mechanistic understanding of these effects allows us to propose a model where deregulation of RA signaling by chronic exposure to IR has pleiotropic effects on neurogenesis and muscle development.

Chronic Exposure of Rats to 100-MHz (CW) Radiofrequency Radiation: Assessment of Biological Effects

1981 ◽  
Vol 86 (3) ◽  
pp. 488 ◽  
Author(s):  
Ralph J. Smialowicz ◽  
J. S. Ali ◽  
Ezra Berman ◽  
Steve J. Bursian ◽  
James B. Kinn ◽  
...  
Keyword(s):  
Chronic Exposure ◽  
Biological Effects ◽  
Radiofrequency Radiation

scholarly journals Toxicity of Thallium at Low Doses: A Review

2019 ◽  
Vol 16 (23) ◽  
pp. 4732 ◽  
Author(s):  
Beatrice Campanella ◽  
Laura Colombaioni ◽  
Edoardo Benedetti ◽  
Agostino Di Ciaula ◽  
Lisa Ghezzi ◽  
...  
Keyword(s):  
Human Health ◽  
Cell Cultures ◽  
Chronic Exposure ◽  
Biological Effects ◽  
Contaminated Water ◽  
Severe Toxicity ◽  
Low Doses ◽  
Regulatory Issues ◽  
Scientific Opinion

A mini review of the toxicity of Thallium (Tl) at low doses is herein presented. Thallium has severe toxicity. Although its acute biological effects have been widely investigated and are well known, its biological effects on human health and in cell cultures at low doses (<100 μg/L) due, for example, to Tl chronic exposure via consumption of contaminated water or foods, have often been overlooked or underestimated. Relatively few papers have been published on this topic and are herein reviewed to provide a focused scientific opinion in the light of current worldwide regulatory issues.

Effects of extremely low-frequency electromagnetic field exposure on the skeletal muscle functions in rats

2020 ◽  
Vol 36 (2) ◽  
pp. 119-131
Author(s):  
Sevgi Gunes ◽  
Belgin Buyukakilli ◽  
Selma Yaman ◽  
Cagatay Han Turkseven ◽  
Ebru Ballı ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Muscle Tissue ◽  
Chronic Exposure ◽  
Low Frequency ◽  
Diaphragm Muscle ◽  
Mechanical Activity ◽  
Control Group ◽  
Female Group ◽  
Bioelectrical Activity ◽  
Extremely Low Frequency

The aim of the present study was to systematically investigate the effects of chronic exposure to extremely low-frequency electromagnetic field (ELF-EMF) on electrophysiological, histological and biochemical properties of the diaphragm muscle in rats. Twenty-nine newly weaned (24 days old, 23–80 g) female ( n = 15) and male ( n = 14) Wistar Albino rats were used in this study. The animals were randomly divided into two groups: the control group and the electromagnetic field (EMF) group. The control group was also randomly divided into two groups: the control female group and the control male group. The EMF exposure group was also randomly divided into two groups: the ELF-EMF female group and the ELF-EMF male group. The rats in the ELF-EMF groups were exposed for 4 h daily for up to 7 months to 50 Hz frequency, 1.5 mT magnetic flux density. Under these experimental conditions, electrophysiological parameters (muscle bioelectrical activity parameters: intracellular action potential and resting membrane potential and muscle mechanical activity parameter: force–frequency relationship), biochemical parameters (Na+, K+, Cl− and Ca+2 levels in the blood serum of rats; Na+-K+ ATPase enzyme-specific activities in muscle tissue; and free radical metabolism in both muscle tissue and serum) and transmission electron microscopic morphometric parameters of the diaphragm muscle were determined. We found that chronic exposure to ELF-EMF had no significant effect on the histological structure and mechanical activity of the muscle and on the majority of muscle bioelectrical activity parameters, with the exception of some parameters of muscle bioelectrical activity. However, the changes in some bioelectrical activity parameters were relatively small and unlikely to be clinically relevant.

Sign in / Sign up

Export Citation Format

Share Document