Dielectric properties of brain tissue at 1 GHz in acute ischemic stroke: Experimental study on swine
(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - November 30, 2016 Category: Radiology Authors: Serguei Semenov, Toan Huynh, Thomas Williams, Brian Nicholson, Anna Vasilenko Tags: Letter to the Editor Source Type: research
Growth characteristics of maize seeds exposed to magnetic field
Standardization of magnetic field was done for maximum enhancement in germination characteristics of maize seeds. Seeds of maize were exposed to static magnetic fields of strength 50, 100, 150, 200, and 250 for 1, 2, 3, and 4 h for all field strengths. Results indicate that magnetic field application enhanced seed performance in terms of percentage germination, speed of germination, seedling length, and seedling dry weight significantly compared to unexposed control. Among the various combinations of field strength and duration, 200 mT for 1 h exposure gave best results. Exposure of seeds to magnetic fields improved ...
Source: Bioelectromagnetics - November 17, 2016 Category: Radiology Authors: Ananta Vashisth, Devendra Kumar Joshi Tags: Research Article Source Type: research
Static magnetic field effects on proteases with fibrinolytic activity produced by Mucor subtilissimus
The influence of a static magnetic field (SMF) on crude enzyme extracts with proteolytic activity is described and discussed. Proteolytic enzymes, which hydrolyze peptide bonds, and fibrinolytic enzymes, which dissolve fibrin clots, have industrial relevance, and applicability dependent on improvements of productivity and activity. We investigated whether a moderate SMF affects proteolysis in different in vitro tests: general proteolysis of azocasein substrate, and static and dynamic fibrinolytic processes (to compare fibrin gel configuration under exposure). Crude enzyme extracts, obtained from solid state fermentation of...
Source: Bioelectromagnetics - November 14, 2016 Category: Radiology Authors: Wendell Albuquerque, Thiago Nascimento, Romero Brand ão‐Costa, Thiago Fernandes, Ana Porto Tags: Research Article Source Type: research
Three ‐dimensional analysis, modeling, and simulation of the effect of static magnetic fields on neurons
The effect of static magnetic fields on neuron function has been studied. None of the possible explanations are decisive or fully consistent with evidence in the literature. Therefore, the purpose of this paper is to examine the different possibilities, for the first time, through a three‐dimensional modeling strategy in an effort to find out which possibility or combination is effective on cell function. A full‐wave analysis was employed to simulate various effects of magnetic fields. The possibilities included force exerted on mobile ions, magnetophoretic force exerted on ions with permeability different from intrace...
Source: Bioelectromagnetics - November 13, 2016 Category: Radiology Authors: Soheil Hashemi, Ali Abdolali Tags: Research Article Source Type: research
Effects of BMP9 and pulsed electromagnetic fields on the proliferation and osteogenic differentiation of human periodontal ligament stem cells
We examined the proliferation and osteogenic differentiation of hPDLSCs treated with either PEMF (15 Hz, 1 h daily, different intensities), or BMP9, or both stimuli. Cell counting kit‐8 (CCK‐8) assay showed that PEMF of different intensities had no effect on the proliferation of hPDLSCs and did not enhance the proliferative capability of BMP9‐transfected cells. Quantitative real‐time polymerase chain reaction (qRT‐PCR) and Western blotting showed that the combination of both PEMFs (1.8 or 2.4 mT) and BMP9 stimulation had a synergistic effect on early and intermediate osteogenic genes and protein expressions...
Source: Bioelectromagnetics - November 11, 2016 Category: Radiology Authors: Tingting Wang, Pei Wang, Zhizhong Cao, Xingxing Wang, Dalin Wang, Yaxian Shen, Da Jing, Erping Luo, Weizhong Tang Tags: Research Article Source Type: research
Effect of static magnetic field on endospore germination
This work investigated the effect of static magnetic field (SMF) on Bacillus atrophaeus endospore germination. Germination was triggered by L‐alanine in 1.3‐T SMF and characterized by ion release, Ca2+‐dipicolinic acid release, and water influx. These events were monitored by electrical conductivity, Tb‐DPA fluorescence, and optical density, respectively. Culturability of endospore germinated in SMF exposure was evaluated by CFU enumeration. Results indicated that 1.3‐T SMF failed to significantly affect endospore germination and culturability, suggesting that the three aforementioned processes were not sensitive...
Source: Bioelectromagnetics - November 11, 2016 Category: Radiology Authors: Wen Jie Wu, Si Li Liu, Pun To Yung Tags: Research Article Source Type: research
A physical mechanism of magnetoreception: Extension and analysis
Proposed is a general physical mechanism of magnetoreception of weak magnetic fields (MFs). The mechanism is based on classical precessional dynamics of a magnetic moment in a thermally disturbed environment and includes a minimum of necessary parameters—the gyromagnetic ratio, thermal relaxation time, and rate of downstream events generated by changes in the state of the magnetic moment. The mechanism imposes general restrictions on the probability of initial biophysical magnetic transduction event before the involvement of specific biophysical and biochemical mechanisms—i.e., regardless of the nature of an MF target ...
Source: Bioelectromagnetics - November 8, 2016 Category: Radiology Authors: Vladimir N. Binhi, Frank S. Prato Tags: Research Article Source Type: research
Issue Information ‐ Page
(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - November 6, 2016 Category: Radiology Tags: Issue Information ‐ Page Source Type: research
Editorial
(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - November 6, 2016 Category: Radiology Tags: Editorial Source Type: research
Estimation of dielectric values for tissue water in the Terahertz range
We present an approach for tissue water, which uses literature values of complex refractive index for pure water together with some considerations regarding the effects of dissolved salts. The approach also involves modeling of Debye and Lorentz absorption parameters, which provides a method for the estimation of ϵ and σ in other tissues. Bioelectromagnetics. © 2016 Wiley Periodicals, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - October 6, 2016 Category: Radiology Authors: Alireza Lajevardipour, Andrew W. Wood, Robert L. McIntosh, Steve Iskra Tags: Letter to the Editor Source Type: research
Effect of static magnetic field on pain level and expression of P2X3 receptors in the trigeminal ganglion in mice following experimental tooth movement
Recent research has demonstrated that static magnetic fields (SMF) can generate an analgesic effect in different conditions. The present study explored effects of SMF on pain levels and expressions of P2X3 receptors in trigeminal ganglion (TG) in mice after experimental tooth movement (tooth movement induced by springs between teeth). Experiments were performed in male mice (body mass: 25–30 g) and divided into SMF + force group, force group, and no force group. Exposure time was over 22 h per day. Mouse Grimace Scale was used for evaluating orofacial pain levels during experimental tooth movement at 4 h and 1,...
Source: Bioelectromagnetics - September 30, 2016 Category: Radiology Authors: Yafen Zhu, Shengguo Wang, Hu Long, Jingyi Zhu, Fan Jian, Niansong Ye, Wenli Lai Tags: Research Article Source Type: research
Enhancing cold atmospheric plasma treatment of cancer cells by static magnetic field
In this study, we propose a novel idea to combine static magnetic field (SMF) with CAP as a tool for cancer therapy. Breast cancer cells and wild type fibroblasts were cultured in 96‐well plates and treated by CAP with or without SMF. Breast cancer cells MDA‐MB‐231 showed a significant decrease in viability after direct plasma treatment with SMF (compared to only plasma treatment). In addition, cancer cells treated by the CAP‐SMF‐activated medium (indirect treatment) also showed viability decrease but was slightly weaker than the direct plasma‐SMF treatment. By integrating the use of SMF and CAP, we were able t...
Source: Bioelectromagnetics - September 30, 2016 Category: Radiology Authors: Xiaoqian Cheng, Kenan Rajjoub, Alexey Shashurin, Dayun Yan, Jonathan H. Sherman, Ka Bian, Ferid Murad, Michael Keidar Tags: Research Article Source Type: research
Short ‐wave therapy for spontaneous pneumothorax: A case report
A patient with spontaneous pneumothorax of 40% was treated by short‐wave diathermy without chest drainage. A 5‐day course of therapy achieved a satisfactory outcome, with the mean rate of air absorption being about 8% per day. We reviewed previous studies and found that short‐wave and ultrashort‐wave therapy could be feasible treatment options for minimal pneumothorax and residual pneumothorax after aspiration. Our study provides a case for further clinical application of short‐wave therapy. We recommend further large‐scale, randomized controlled studies to evaluate the effects of this mode of treatment. Bioele...
Source: Bioelectromagnetics - September 30, 2016 Category: Radiology Authors: Dongmei Ye, Chen Chen, Liang Wang, Mei Shen Tags: Letter to the Editor Source Type: research
Effects of combined treatment with ibandronate and pulsed electromagnetic field on ovariectomy ‐induced osteoporosis in rats
This study investigated the effects of IBN + PEMF on bone turnover, mineral density, microarchitecture, and biomechanical properties in an ovariectomized (OVX) rat model of osteoporosis. Fifty 3‐month‐old rats were randomly apportioned to receive a sham‐operation (n = 10), or ovariectomy (n = 40). The latter group was equally divided as the model (OVX control) or to receive IBN, PEMF, or IBN + PEMF. Beginning the day after surgery, the IBN and IBN + PEMF groups received weekly subcutaneous IBN; the PEMF and IBN + PEMF groups were given daily PEMF during the same 12 weeks. After 12 weeks of tre...
Source: Bioelectromagnetics - September 30, 2016 Category: Radiology Authors: Jun Zhou, Yuan Liao, Haitao Xie, Ying Liao, Yahua Zeng, Neng Li, Guanghua Sun, Qi Wu, Guijuan Zhou Tags: Research Article Source Type: research
Variographic analysis of public exposure to electromagnetic radiation due to cellular base stations
The spatial structure of the vertical component of the electric field emitted by base stations in the Brussels region (Belgium) is measured, and studied using the variogram. A relationship between the variogram shape and base station antenna density in each measurement area is found; the variogram range and sill level are shown to depend on cellular base stations’ antenna density, following exponential laws. Bioelectromagnetics. © 2016 Wiley Periodicals, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - September 30, 2016 Category: Radiology Authors: Thomas Lemaire, Joe Wiart, Philippe De Doncker Tags: Research Article Source Type: research
