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Bioelectromagnetics

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https://www.readbyqxmd.com/read/28636777/biological-effects-related-to-geomagnetic-activity-and-possible-mechanisms
#1
REVIEW
Viacheslav V Krylov, Margaret Larkin
This review presents contemporary data on the biological effects of geomagnetic activity. Correlations between geomagnetic indices and biological parameters and experimental studies that used simulated geomagnetic storms to detect possible responses of organisms to these events in nature are discussed. Possible mechanisms by which geomagnetic activity influences organisms are also considered. Special attention is paid to the idea that geomagnetic activity is perceived by organisms as a disruption of diurnal geomagnetic variation...
June 21, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28628224/human-exposure-to-power-frequency-magnetic-fields-up-to-7-6%C3%A2-mt-an-integrated-eeg-fmri-study
#2
Julien Modolo, Alex W Thomas, Alexandre Legros
We assessed the effects of power-line frequency (60 Hz in North America) magnetic fields (MF) in humans using simultaneous electroencephalography (EEG) and functional magnetic resonance imaging (fMRI). Twenty-five participants were enrolled in a pseudo-double-blind experiment involving "real" or "sham" exposure to sinusoidal 60 Hz MF exposures delivered using the gradient coil of an MRI scanner following two conditions: (i) 10 s exposures at 3 mT (10 repetitions); (ii) 2 s exposures at 7.6 mT (100 repetitions)...
June 19, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28628221/influence-of-radiofrequency-electromagnetic-waves-from-3rd-generation-cellular-phones-on-fertilization-and-embryo-development-in-mice
#3
Satoshi Suzuki, Miho Okutsu, Ryota Suganuma, Hiromi Komiya, Setsu Nakatani-Enomoto, Shunsuke Kobayashi, Yoshikazu Ugawa, Hiroyuki Tateno, Keiya Fujimori
The purpose of this study was to evaluate the effects of 3rd-generation (3G) cellular phone radiofrequency-electromagnetic wave (RF-EMW) exposure on fertilization and embryogenesis in mice. Oocytes and spermatozoa were exposed to 3G cellular phone RF-EMWs, 1.95 GHz wideband code division multiple access, at a specific absorption rate of 2 mW/g for 60 min, or to sham exposure. After RF-EMW exposure, in vitro fertilization and intracytoplasmic sperm injection were performed. Rates of fertilization, embryogenesis (8-cell embryo, blastocyst), and chromosome aberration were compared between the combined spermatozoa and oocyte groups: both exposed, both non-exposed, one exposed, and the other non-exposed...
June 19, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28570746/influence-of-extremely-low-frequency-magnetic-fields-on-ca-2-signaling-and-double-messenger-system-in-mice-hippocampus-and-reversal-function-of-procyanidins-extracted-from-lotus-seedpod
#4
Haihui Zhang, Yuanyuan Dai, Yanxiang Cheng, Yuanqing He, Zandile Manyakara, Yuqing Duan, Guibo Sun, Xiaobo Sun
This research investigated the influence of extremely low frequency magnetic fields (ELF-MF; 50 Hz, 8 mT, 4 h per day, for 28 days) on calcium ion signaling and the double messenger system in the hippocampus of mice. Messengers that were studied included: G-protein, Ins(1,4,5)P3 (IP3 ), diacylglycerol (DAG), cAMP-dependent protein kinase (PKA), and Ca(2+) -dependent protein kinase C (PKC). The results showed that ELF-MF caused an increase in the levels of Gi protein, IP3, DAG, PKA and PKC beta, calcium and calmodulin-dependent protein phosphatase calcineuring (PP2B), and intracellular Ca(2+) content, and a decrease in calcium/calmodulin-dependent protein kinase II (CaMK II) and PKC alpha...
June 1, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28543319/glycocalyx-bending-by-an-electric-field-increases-cell-motility
#5
Francis X Hart, John R Palisano
The application of physiological strength electric fields may produce a wide range of effects on cells. The mechanisms by which cells detect the presence of these fields, however, are not fully understood. Previous experiments have shown that directionality of cells in the field is governed by an electromechanical mechanism in which the field exerts a torque on the negatively charged, inner glycocalyx that is then transmitted as a force on the cytoskeleton. This mechanism is similar to that by which cells detect fluid shear forces...
May 24, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28510268/effect-of-intervention-initiation-timing-of-pulsed-electromagnetic-field-on-ovariectomy-induced-osteoporosis-in-rats
#6
Jun Zhou, Yuan Liao, Yahua Zeng, Haitao Xie, Chengxiao Fu, Neng Li
The aim of this study is to explore the effect of timing of initiation of pulsed electromagnetic field (PEMF) therapy on bone mass, microarchitecture, and biomechanical properties, and to investigate receptor activator of NF-kB (RANK) expression in ovariectomized (OVX) rats. Sixty female Sprague-Dawley rats were randomly divided into two equal batches of three groups each (10 rats in each group). The first batch comprised of sham-operated (Sham-0 group), ovariectomized (OVX-0 group), and ovariectomized plus treated with PEMF starting from the day of OVX (Early PEMF group)...
May 16, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28453873/induced-orientation-of-nitrogen-monoxide-and-azide-ion-vibrations-in-human-hemoglobin-in-bidistilled-water-solution-under-a-static-magnetic-field
#7
Emanuele Calabrò, Salvatore Magazù
In this study, we report the effects of static magnetic fields (SMFs) at 200 mT on different hemoglobin aqueous solutions, in the absence and in the presence of sucrose and trehalose, studied by FTIR spectroscopic techniques. Significant decrease in intensity of Amide I and Amide II vibration bands was observed after 6 h exposure for hemoglobin in bidistilled water solution. Also, it was observed that the decrease in intensity of the Amide I band was larger than the Amide II after exposure. This result can be explained assuming that an SMF induces increase of hydrogen bonding in hemoglobin in bidistilled water solution...
April 28, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28431194/closed-form-equation-to-estimate-the-dielectric-properties-of-biological-tissues-as-a-function-of-age
#8
Beadaa Mohammed, Konstanty Bialkowski, Amin Abbosh, Paul C Mills, Andrew P Bradley
Developing microwave systems for biomedical applications requires accurate dielectric properties of biological tissues for reliable modeling before prototyping and subject testing. Dielectric properties of tissues decrease with age due to the change in their water content, but there are no detailed age-dependent data, especially for young tissue-like newborns, in the literature. In this article, an age-dependent formula to predict the dielectric properties of biological tissues was derived. In the proposed method, the variation of water concentration in each type of tissue as a function of age was used to calculate its relative permittivity and conductivity...
April 21, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28570777/issue-information-page
#9
(no author information available yet)
No abstract text is available yet for this article.
July 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28444698/radiofrequency-exposure-levels-in-amsterdam-schools
#10
LETTER
Luuk van Wel, Roel Vermeulen, Manon van Eijsden, Tanja Vrijkotte, Hans Kromhout, Anke Huss
No abstract text is available yet for this article.
July 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28430370/extremely-low-frequency-electromagnetic-field-elf-emf-reduces-oxidative-stress-and-improves-functional-and-psychological-status-in-ischemic-stroke-patients
#11
Natalia Cichoń, Michał Bijak, Elżbieta Miller, Joanna Saluk
As a result of ischaemia/reperfusion, massive generation of reactive oxygen species occurs, followed by decreased activity of antioxidant enzymes. Extremely low frequency electromagnetic fields (ELF-EMF) can modulate oxidative stress, but there are no clinical antioxidant studies in brain stroke patients. The aim of our study was to investigate the effect of ELF-EMF on clinical and antioxidant status in post-stroke patients. Fifty-seven patients were divided into two groups: ELF-EMF and non-ELF-EMF. Both groups underwent the same 4-week rehabilitation program...
July 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28426166/acute-effects-of-radiofrequency-electromagnetic-field-emitted-by-mobile-phone-on-brain-function
#12
REVIEW
Jun Zhang, Alexander Sumich, Grace Y Wang
Due to its attributes, characteristics, and technological resources, the mobile phone (MP) has become one of the most commonly used communication devices. Historically, ample evidence has ruled out the substantial short-term impact of radiofrequency electromagnetic field (RF-EMF) emitted by MP on human cognitive performance. However, more recent evidence suggests potential harmful effects associated with MP EMF exposure. The aim of this review is to readdress the question of whether the effect of MP EMF exposure on brain function should be reopened...
July 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28370392/extremely-low-frequency-electromagnetic-field-induces-neural-differentiation-of-hbm-mscs-through-regulation-of-zn-metallothionein-3
#13
Anastasia Rosebud Aikins, Sung-Won Hong, Hyun-Jung Kim, Cheol-Ho Yoon, Joo-Hee Chung, MiJung Kim, Chan-Wha Kim
Extremely low-frequency electromagnetic field (ELFEMF) can stimulate neural differentiation in human bone marrow-derived mesenchymal cells (hBM-MSCs), and this provides an opportunity for research on neurodegenerative diseases such as Alzheimer's disease (AD). Metallothionein-3 (MT3), an isoform of the metal-binding proteins, metallothioneins, involved in maintaining intracellular zinc (Zn) homeostasis and the deregulation of zinc homeostasis, has separately been implicated in AD. Here, we investigated the effect of ELFEMF-induced neural differentiation of hBM-MSCs on Zn-MT3 homeostatic interaction...
July 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28370033/extremely-low-frequency-electromagnetic-field-exposure-enhances-inflammatory-response-and-inhibits-effect-of-antioxidant-in-raw-264-7-cells
#14
Soo Jeong Kim, Ye Won Jang, Kyung Eun Hyung, Da Kyoung Lee, Kee Hyeob Hyun, Seung Hwarn Jeong, Kyung Hoon Min, Wonku Kang, Ji Hoon Jeong, So-Young Park, Kwang Woo Hwang
In recent years, there has been a dramatic increase in the number and variety of electronic devices that emit electromagnetic waves. Because people live and work in close proximity to these pieces of electrical equipment, there is growing concern surrounding the destruction of homeostasis by electromagnetic field exposure. In the present study, the effects of 60 Hz 0.8 mT extremely low-frequency electromagnetic fields (ELF-EMF) on a macrophage cell line (RAW 264.7) were examined. Under defined ELF-EMF exposure conditions, the production of nitric oxide and pro-inflammatory cytokines, TNF-α, IL-1β, and IL-6, were increased in RAW 264...
July 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28342194/analysis-of-mobile-phone-use-among-young-patients-with-brain-tumors-in-japan
#15
Yasuto Sato, Noriko Kojimahara, Naohito Yamaguchi
The purpose of this study was to clarify ownership and usage of mobile phones among young patients with brain tumors in Japan. The subjects of this study were patients with brain tumors diagnosed between 2006 and 2010 who were between the ages of 6 and 18 years. The target population for the analysis was 82 patients. Patients were divided into two groups: 16 patients who were mobile phone owners 1 year before diagnosis, and 66 patients who did not own mobile phones (non-owners). Using data on the mobile phone ownership rate obtained from three general-population surveys, we calculated the expected number of mobile phone owners...
July 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28342187/effect-of-adverse-environmental-conditions-and-protective-clothing-on-temperature-rise-in-a-human-body-exposed-to-radiofrequency-electromagnetic-fields
#16
Stephen M Moore, Robert L McIntosh, Steve Iskra, Alireza Lajevardipour, Andrew W Wood
This study considers the computationally determined thermal profile of a finely discretized, heterogeneous human body model, simulating a radiofrequency electromagnetic field (RF-EMF) worker wearing protective clothing subject to RF-EMF exposure, and subject to various environmental conditions including high ambient temperature and high humidity, with full thermoregulatory mechanisms in place. How the human body responds in various scenarios was investigated, and the information was used to consider safety limits in current international RF-EMF safety guidelines and standards...
July 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28236321/effects-of-local-vibration-and-pulsed-electromagnetic-field-on-bone-fracture-a-comparative-study
#17
Hakkı Murat Bilgin, Ferhat Çelik, Mehmet Gem, Veysi Akpolat, İsmail Yıldız, Aysun Ekinci, Mehmet Siraç Özerdem, Selçuk Tunik
The effectiveness of various therapeutic methods on bone fracture has been demonstrated in several studies. In the present study, we tried to evaluate the effect of local low-magnitude, high-frequency vibration (LMHFV) on rat tibia fracture in comparison with pulsed electromagnetic fields (PEMF) during the healing process. Mid-diaphysis tibiae fractures were induced in 30 Sprague-Dawley rats. The rats were assigned into groups such as control (CONT), LMHFV (15 min/day, 7 days/week), and PEMF (3.5 h/day, 7 days/week) for a three-week treatment...
July 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28374956/issue-information-page
#18
(no author information available yet)
No abstract text is available yet for this article.
May 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28324620/exposure-to-electromagnetic-fields-from-smart-utility-meters-in-gb-part-i-laboratory-measurements
#19
Azadeh Peyman, Darren Addison, Terry Mee, Cristian Goiceanu, Myron Maslanyj, Simon Mann
Laboratory measurements of electric fields have been carried out around examples of smart meter devices used in Great Britain. The aim was to quantify exposure of people to radiofrequency signals emitted from smart meter devices operating at 2.4 GHz, and then to compare this with international (ICNIRP) health-related guidelines and with exposures from other telecommunication sources such as mobile phones and Wi-Fi devices. The angular distribution of the electric fields from a sample of 39 smart meter devices was measured in a controlled laboratory environment...
May 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28240792/radiofrequency-exposure-near-an-attocell-as-part-of-an-ultra-high-density-access-network
#20
Arno Thielens, Günter Vermeeren, Olivier Caytan, Guy Torfs, Piet Demeester, Johan Bauwelinck, Hendrik Rogier, Luc Martens, Wout Joseph
In the future, wireless radiofrequency (RF) telecommunications networks will provide users with gigabit-per-second data rates. Therefore, these networks are evolving toward hybrid networks, which will include commonly used macro- and microcells in combination with local ultra-high density access networks consisting of so-called attocells. The use of attocells requires a proper compliance assessment of exposure to RF electromagnetic radiation. This paper presents, for the first time, such a compliance assessment of an attocell operating at 3...
May 2017: Bioelectromagnetics
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