scholarly journals Assessment of the Electromagnetic Field Exposure during the Use of Portable Radios in the Context of Potential Health Effects

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6276
Author(s):  
Jarosław Kieliszek ◽  
Joanna Wyszkowska ◽  
Jaromir Sobiech ◽  
Robert Puta
Keyword(s):  
Electromagnetic Field ◽  
Health Effects ◽  
Computer Simulations ◽  
Thermal Effects ◽  
The Body ◽  
Control Group ◽  
Field Exposure ◽  
Potential Health ◽  
Portable Radio ◽  
Neurophysiological Tests

The paper presents research on the electromagnetic hazards related to the flow of electric currents throughout the bodies of employees using portable radios. The values often exceed established limits, which may lead to potential dysfunctions of the body and affect the safety of performed professional duties. The measurements of the electric field (E-field) distribution of a typical commercial portable radio, the limb contact current calculations, and the computer simulations determining a specific absorption rate (SAR) were supplemented with pilot neurophysiological tests. The assessment indicated a large spatial variability of the E-field strength around the devices. The head of the operator and the hand holding the radio were often in the electromagnetic field (EMF), which exceeded the established limits. The calculated SAR values ranged within the permitted limits. The conducted neurophysiological tests showed no effects of EMF exposure in comparison to the control group. The assessment of exposure to the EMF using a portable radio is initially performed by analyzing external measures: both computer simulations and measurements of workers’ limb currents. The SAR values exclude thermal effects; however, they do not eliminate potential neuromuscular effects. More neurophysiological tests are needed to obtain a broader picture of possible health effects.

scholarly journals Effect of Cod Residual Protein Supplementation on Markers of Glucose Regulation in Lean Adults: A Randomized Double-Blind Study

Nutrients ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1445
Author(s):  
Iselin Vildmyren ◽  
Alfred Halstensen ◽  
Adrian McCann ◽  
Øivind Midttun ◽  
Per Magne Ueland ◽  
...  
Keyword(s):  
Health Effects ◽  
Plasma Concentrations ◽  
Protein Supplementation ◽  
Blind Study ◽  
Control Group ◽  
Human Consumption ◽  
Double Blind Study ◽  
Double Blind ◽  
Potential Health ◽  
Residual Protein

Large quantities of protein-rich cod residuals, which are currently discarded, could be utilized for human consumption. Although fish fillet intake is related to beneficial health effects, little is known about the potential health effects of consuming cod residual protein powder. Fifty lean adults were randomized to consume capsules with 8.1 g/day of cod residual protein (Cod-RP) or placebo capsules (Control group) for eight weeks, in this randomized, double-blind study. The intervention was completed by 40 participants. Fasting glucose and insulin concentrations were unaffected by Cod-RP supplementation, whereas plasma concentrations of α-hydroxybutyrate, β-hydroxybutyrate and acetoacetate all were decreased compared with the Control group. Trimethylamine N-oxide concentration in plasma and urine were increased in the Cod-RP group compared with the Control group. To conclude, the reduction in these potential early markers of impaired glucose metabolism following Cod-RP supplementation may indicate beneficial glucoregulatory effects of cod residual proteins. Trimethylamine N-oxide appears to be an appropriate biomarker of cod residual protein intake in lean adults.

scholarly journals Exposure time-dependent thermal effects of radiofrequency electromagnetic field exposure on the whole body of rats

2016 ◽  
Vol 41 (5) ◽  
pp. 655-666 ◽  
Author(s):  
Shin Ohtani ◽  
Akira Ushiyama ◽  
Machiko Maeda ◽  
Kenji Hattori ◽  
Naoki Kunugita ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Exposure Time ◽  
Thermal Effects ◽  
Time Dependent ◽  
Whole Body ◽  
Field Exposure ◽  
Radiofrequency Electromagnetic Field

scholarly journals Biological Effects of EM Radiations from Mobile Phones

2002 ◽  
Vol 7 (1) ◽  
pp. 45
Author(s):  
Adel A. Ali ◽  
Ahmed M. Al-Naamany
Keyword(s):  
Health Effects ◽  
Mobile Phones ◽  
Thermal Effects ◽  
Current Knowledge ◽  
Biological Effects ◽  
The Body ◽  
Base Stations ◽  
Thermal Heating ◽  
Heating Effects ◽  
Rf Exposure

Direct health effects could result following exposure to RF by thermal (heating effects). Recent Studies have shown that there are public fears on effects that can be caused mainly by holding mobile phones close to the body, or as a result of possible non-thermal effects from both phones and base stations.  This paper offers an overview on the biological effects of electromagnetic radiation caused by mobile phones. Exposures of individuals to RF radiation from these sources will depend upon their proximity and may be above those from mobile phone base stations, although still well below guidelines. From a review of the scientific literature, it is concluded that there were no established health effects from exposure to the RF fields from mobile phones. However, there are gaps in knowledge requiring further research, but current knowledge suggests that RF exposure to levels below the guidelines were not a risk to health.  

scholarly journals Morphological and Biochemical Changes in the Rat Ovaries Following Electromagnetic Field Exposure

2020 ◽  
Author(s):  
Savaş Kanbur ◽  
Mehmet Emin ONGER
Keyword(s):  
Electromagnetic Field ◽  
Sham Group ◽  
Ovarian Follicle ◽  
Control Group ◽  
Albino Rats ◽  
Field Exposure ◽  
Toxic Agent ◽  
Rat Ovary ◽  
Wistar Albino Rats ◽  
Control Sham

Abstract PurposeThis study aims to investigate the effect of electromagnetic field (EMF) exposure which is environmental toxic agent on rat ovary. MethodsA total of 30 female Wistar albino rats are randomly divided into three groups (n=10) as Control, Sham, and EMF groups. The rats are not exposed any processes in Control group. The rats are kept in special cage for the same duration as in the EMF group without any EMF exposure in Sham group while the rats are exposed to 900 MHz EMF with a special mechanism in EMF group. At the end of day 28, the ovarian tissues are collected. Stereological and biochemical examinations are performed.ResultsConcerning the GSI values, there are statistical differences between the Control and EMF (p=0.001), and Sham and EMF (p=0.001) groups, respectively. There are also statistical differences between Control and EMF groups in terms of volumetric parameters including medullary, and follicular antral volumes. Regarding the biochemical parameters, there are statistically differences between the Control and EMF (p=0.000), and Sham and EMF (p=0.000) groups, respectively.ConclusionIt may be concluded that exposure to a 900-MHz EMF leads to changes in ovarian follicle volumes which may affect the ovarian reservoir.

scholarly journals Modelling and Evaluation of the Absorption of the 866 MHz Electromagnetic Field in Humans Exposed near to Fixed I-RFID Readers Used in Medical RTLS or to Monitor PPE

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4251
Author(s):  
Patryk Zradziński ◽  
Jolanta Karpowicz ◽  
Krzysztof Gryz ◽  
Grzegorz Owczarek ◽  
Victoria Ramos
Keyword(s):  
Electromagnetic Field ◽  
High Frequency ◽  
Thermal Effects ◽  
Microstrip Antennas ◽  
The Body ◽  
Uhf Rfid ◽  
Exposure Limits ◽  
Passive Tags ◽  
Radiated Power ◽  
Rfid Readers

The aim of this study was to model and evaluate the Specific Energy Absorption Rate (SAR) values in humans in proximity to fixed multi-antenna I-RFID readers of passive tags under various scenarios mimicking exposure when they are incorporated in Real-Time Location Systems (RTLS), or used to monitor Personal Protective Equipment (PPE). The sources of the electromagnetic field (EMF) in the modelled readers were rectangular microstrip antennas at a resonance frequency in free space of 866 MHz from the ultra-high frequency (UHF) RFID frequency range of 865–868 MHz. The obtained results of numerical modelling showed that the SAR values in the body 5 cm away from the UHF RFID readers need consideration with respect to exposure limits set by international guidelines to prevent adverse thermal effects of exposure to EMF: when the effective radiated power exceeds 5.5 W with respect to the general public/unrestricted environments exposure limits, and with respect to occupational/restricted environments exposure limits, when the effective radiated power exceeds 27.5 W.

scholarly journals Naturally occurring hormones in foods and potential health effects

2020 ◽  
Vol 4 ◽  
pp. 239784732093628
Author(s):  
Orsolya M Palacios ◽  
Heather Nelson Cortes ◽  
Belinda H Jenks ◽  
Kevin C Maki
Keyword(s):  
Health Effects ◽  
The United States ◽  
The Body ◽  
Human Consumption ◽  
Daily Consumption ◽  
Potential Health ◽  
Naturally Occurring ◽  
Hormone Content ◽  
Hormone Biosynthesis ◽  
Serving Sizes

Hormones and hormone-like substances, for example, phytoestrogens, are food components that can be endogenously produced by a food source or occur secondary to farming practices. The hormone content of foods has been studied for decades, and safety evaluations in the United States and Europe indicate that naturally occurring hormones found in foods are safe for human consumption. More recent studies have focused on the role of certain hormones found in specific foods (e.g. dairy or soy) and their potential health effects. However, limited summaries exist on food content of hormones and hormone-like phytoestrogens in the context of a comprehensive US diet and implications, if any, of their daily consumption for overall health. This review provides an outline of hormone biosynthesis and functions in the body; discusses the more commonly studied, naturally occurring hormones in food and their biological role within food; estimates relative dietary contribution and when available, bioavailability, of naturally occurring food hormones; and summarizes the potential health associations of their intake in food. Based on the review of the scientific literature, the hormone content of typical serving sizes of commonly consumed foods is undetectable or in quantities that fall well within safety guidelines without any evidence for adverse effects on health.

Dielectric Properties of Rat Blood in Coagulation Process

2013 ◽  
Vol 373-375 ◽  
pp. 1007-1010
Author(s):  
Gun Li
Keyword(s):  
Electromagnetic Field ◽  
Dielectric Properties ◽  
Human Body ◽  
The Body ◽  
Frequency Range ◽  
Field Exposure ◽  
Rat Blood ◽  
Coagulation Process ◽  
Different Characteristics ◽  
Insight Into

Dielectric properties of rat blood is measured in frequency range of 10kHz-10MHz during its coagulation process, excluding the impaction factor of temperature via measuring at 37±2°C, the results reflect the changes of relative permittivity of rat blood after it leaves the body to half an hour. Experimental results show that dielectric properties of rat blood in the coagulation process show very different characteristics in different frequencies, mechanisms of our measurements are also analyzed theoretically. The findings should provide valuable information of biochemical reaction within blood during the process of coagulation, and also provide insight into assessment of electromagnetic field exposure for human body.

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