Dielectric properties of dog brain tissue measured in vitro across the 0.3 –3 GHz band
Dielectric properties of dead Greyhound female dogs’ brain tissues at different ages were measured at room temperature across the frequency range of 0.3–3 GHz. Measurements were made on excised tissues, in vitro in the laboratory, to carry out dielectric tests on sample tissues. Each dataset for a brain tissue was parametrized using the Cole–Cole expression, and the relevant Cole–Cole parameters for four tissue types are provided. A comparison was made with the database available in literature for other animals and human brain tissue. Results of two types of tissues (white matter and skull) showed systematic vari...
Source: Bioelectromagnetics - September 22, 2016 Category: Radiology Authors: Beadaa Mohammed, Konstanty Bialkowski, Amin Abbosh, Paul C. Mills, Andrew P. Bradley Tags: Research Article Source Type: research
Magnetic field therapy in patients with cytostatics ‐induced polyneuropathy: A prospective randomized placebo‐controlled phase‐III study
In this study, we randomized 44 patients with CIPN to two treatment groups, where 21 patients were treated with MFT (Group 1) and 23 patients received placebo (Group 2). We evaluated the efficacy of MFT at baseline (T1), after 3 weeks of study treatment (T2), and after 3 months of study treatment (T3). The primary endpoint was nerve conduction velocity (NCV), while secondary endpoints were the Common Toxicity Criteria (CTCAE) score and the Pain Detect End Score at T3. Seventeen of the patients in Group 1 and 14 patients in Group 2 completed the respective study treatment. The primary endpoint, significant improvement of NC...
Source: Bioelectromagnetics - September 21, 2016 Category: Radiology Authors: Oliver Rick, Ulrike von Hehn, Eberhard Mikus, Hermann Dertinger, Georg Geiger Tags: Research Article Source Type: research
Gibberellins are involved in effect of near ‐null magnetic field on Arabidopsis flowering
We previously found that flowering of Arabidopsis was suppressed by near‐null magnetic field, which was related to the modification of cryptochrome. To disclose the physiological mechanism of this effect, we detected gibberellin (GA) levels and expressions of GA biosynthetic and signaling genes in wild type Arabidopsis plants and cryptochrome double mutant, cry1/cry2, grown in near‐null magnetic field. We found that levels of GA4, GA9, GA34, and GA51 in wild type plants in near‐null magnetic field were significantly decreased compared with local geomagnetic field controls. However, GA levels in cry1/cry2 mutants in n...
Source: Bioelectromagnetics - September 7, 2016 Category: Radiology Authors: Chunxiao Xu, Yang Yu, Yuxia Zhang, Yue Li, Shufeng Wei Tags: Research Article Source Type: research
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(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - September 5, 2016 Category: Radiology Tags: Issue Information ‐ Page Source Type: research
Response of perennial woody plants to seed treatment by electromagnetic field and low ‐temperature plasma
Radiofrequency (5.28 MHz) electromagnetic radiation and low‐temperature plasma were applied as short‐term (2–15 min) seed treatments to two perennial woody plant species, including Smirnov's rhododendron (Rhododendron smirnowii Trautv.) and black mulberry (Morus nigra L.). Potential effects were evaluated using germination indices and morphometry. The results suggest that treatment with electromagnetic field stimulated germination of freshly harvested R. smirnowii seeds (increased germination percentage up to 70%), but reduced germination of fresh M. nigra seeds (by 24%). Treatment with low‐temperature plasma n...
Source: Bioelectromagnetics - August 30, 2016 Category: Radiology Authors: Vida Mildaziene, Giedre Pauzaite, Asta Malakauskiene, Rasa Zukiene, Zita Nauciene, Irina Filatova, Viktor Azharonok, Veronika Lyushkevich Tags: Research Article Source Type: research
Microscale temperature and SAR measurements in cell monolayer models exposed to millimeter waves
Due to shallow penetration of millimeter waves (MMW) and convection in liquid medium surrounding cells, the problem of accurate assessment of local MMW heating in in vitro experiments remains unsolved. Conventional dosimetric MMW techniques, such as infrared imaging or fiber optic (FO) sensors, face several inherent limits. Here we propose a methodology for accurate local temperature measurement and subsequent specific absorption rate (SAR) retrieval using microscale thermocouples (TC). SAR was retrieved by fitting the measured initial temperature rise to the numerical solution of an equivalent thermal model. It was found ...
Source: Bioelectromagnetics - August 29, 2016 Category: Radiology Authors: Maxim Zhadobov, Stanislav I. Alekseev, Ronan Sauleau, Yann Le Page, Yves Le Dr éan, Evgeny E. Fesenko Tags: Research Article Source Type: research
A short ‐term extremely low frequency electromagnetic field exposure increases circulating leukocyte numbers and affects HPA‐axis signaling in mice
In conclusion, short‐term ELF‐EMF exposure may affect hypothalamic‐pituitary‐adrenal axis activation in mice. Changes in stress hormone release may explain changes in circulating leukocyte numbers and composition. Bioelectromagnetics. © 2016 The Authors. Bioelectromagnetics Published by Wiley Periodicals, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - August 24, 2016 Category: Radiology Authors: Stan de Kleijn, Gerben Ferwerda, Michelle Wiese, Jos Trentelman, Jan Cuppen, Tamas Kozicz, Linda de Jager, Peter W. M. Hermans, B. M. Lidy Verburg ‐van Kemenade Tags: Research Article Source Type: research
Analgesic effect of repetitive transcranial magnetic stimulation (rTMS) in patients with chronic low back pain
This study shows for the first time that long‐term repeated sessions of rTMS decrease pain perception of LBP. Bioelectromagnetics. © 2016 Wiley Periodicals, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - August 22, 2016 Category: Radiology Authors: M ónica Ambriz‐Tututi, Beatriz Alvarado‐Reynoso, René Drucker‐Colín Tags: Research Article Source Type: research
Effect of in vivo and in vitro exposure to electrostatic field on some hematological parameters in rats
The aim of this study was to investigate the effect of the external electrostatic field (ESF) on some hematological parameters in rats. Both in vivo and in vitro experiments were carried out. In in vivo investigations, rats were exposed to ESF (200 kV/m) during short (1 h) and long periods (6 days, 6 h daily). For in vitro study, the blood of intact rats was exposed to ESF for 1 h. Blood hematology was measured using validated ABX Micros ESV 60 Veterinary Hematology Analyzer. DNA damage in blood leucocytes was detected by means of comet assay. ESF effect on blood cell count was mainly manifested in white blood cell...
Source: Bioelectromagnetics - August 17, 2016 Category: Radiology Authors: Hayk Harutyunyan, Vahe Mkrtchyan, Karine Sukiasyan, Gohar Sahakyan, Gayane Poghosyan, Ani Soghomonyan, Eugene Cherniavsky, Ekaterina Bondarenko, Vladimir Shkumatov Tags: Research Article Source Type: research
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(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - August 11, 2016 Category: Radiology Tags: Issue Information ‐ Page Source Type: research
1950 MHz radiofrequency electromagnetic fields do not aggravate memory deficits in 5xFAD mice
The increased use of mobile phones has generated public concern about the impact of radiofrequency electromagnetic fields (RF‐EMF) on health. In the present study, we investigated whether RF‐EMFs induce molecular changes in amyloid precursor protein (APP) processing and amyloid beta (Aβ)‐related memory impairment in the 5xFAD mouse, which is a widely used amyloid animal model. The 5xFAD mice at the age of 1.5 months were assigned to two groups (RF‐EMF‐ and sham‐exposed groups, eight mice per group). The RF‐EMF group was placed in a reverberation chamber and exposed to 1950 MHz electromagnetic fields for 3 ...
Source: Bioelectromagnetics - July 18, 2016 Category: Radiology Authors: Yeonghoon Son, Ye Ji Jeong, Jong Hwa Kwon, Hyung ‐Do Choi, Jeong‐Ki Pack, Nam Kim, Yun‐Sil Lee, Hae‐June Lee Tags: Research Article Source Type: research
Biological responses of human solid tumor cells to X ‐ray irradiation within a 1.5‐Tesla magnetic field generated by a magnetic resonance imaging–linear accelerator
In conclusion, MF within the MRL does not seem to affect in vitro tumor radioresponsiveness as compared with a conventional Linac. Bioelectromagnetics. 2016;9999:1–10. © 2016 Wiley Periodicals, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - July 18, 2016 Category: Radiology Authors: Li Wang, Stan Jelle Hoogcarspel, Zhifei Wen, Marco van Vulpen, David P. Molkentine, Jan Kok, Steven H. Lin, Roel Broekhuizen, Kie ‐Kian Ang, Niels Bovenschen, Bas W. Raaymakers, Steven J. Frank Tags: Research Article Source Type: research
1950 MHz radiofrequency electromagnetic fields do not aggravate memory deficits in 5xFAD mice
The increased use of mobile phones has generated public concern about the impact of radiofrequency electromagnetic fields (RF‐EMF) on health. In the present study, we investigated whether RF‐EMFs induce molecular changes in amyloid precursor protein (APP) processing and amyloid beta (Aβ)‐related memory impairment in the 5xFAD mouse, which is a widely used amyloid animal model. The 5xFAD mice at the age of 1.5 months were assigned to two groups (RF‐EMF‐ and sham‐exposed groups, eight mice per group). The RF‐EMF group was placed in a reverberation chamber and exposed to 1950 MHz electromagnetic fields for 3 ...
Source: Bioelectromagnetics - July 18, 2016 Category: Radiology Authors: Yeonghoon Son, Ye Ji Jeong, Jong Hwa Kwon, Hyung‐Do Choi, Jeong‐Ki Pack, Nam Kim, Yun‐Sil Lee, Hae‐June Lee Tags: Research Article Source Type: research
Static magnetic field induced epigenetic changes in wheat callus
In this study, low intensity static magnetic field‐induced DNA damage and methylation in wheat calli were investigated by using Random Amplified Polymorphic DNA and Coupled Restriction Enzyme Digestion‐Random Amplification techniques. Calli were derived from mature embryos of wheat. Both 7‐ and 14‐day‐old wheat calli were exposed to 7 mT (millitesla) static MF for 24, 48, 72, 96, or 120 h of incubation period. The highest change in polymorphism rate was obtained in calli exposed to 7 mT MF for 120 h in both 7‐ and 14‐day‐old calli. Increase in MF duration caused DNA hypermethylation in both 7‐ and...
Source: Bioelectromagnetics - June 30, 2016 Category: Radiology Authors: Murat Aydin, Mahmut Sinan Taspinar, Zeynep Elibol Cakmak, Rahmi Dumlupinar, Guleray Agar Tags: Research Article Source Type: research
Heat equation inversion framework for average SAR calculation from magnetic resonance thermal imaging
Deposition of radiofrequency (RF) energy can be quantified via electric field or temperature change measurements. Magnetic resonance imaging has been used as a tool to measure three dimensional small temperature changes associated with RF radiation exposure. When duration of RF exposure is long, conversion from temperature change to specific absorption rate (SAR) is nontrivial due to prominent heat‐diffusion and conduction effects. In this work, we demonstrated a method for calculation of SAR via an inversion of the heat equation including heat‐diffusion and conduction effects. This method utilizes high‐resolution th...
Source: Bioelectromagnetics - June 30, 2016 Category: Radiology Authors: Leeor Alon, Daniel K. Sodickson, Cem M. Deniz Tags: Research Article Source Type: research
