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Bioelectromagnetics

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https://www.readbyqxmd.com/read/27901288/dielectric-properties-of-brain-tissue-at-1%C3%A2-ghz-in-acute-ischemic-stroke-experimental-study-on-swine
#1
LETTER
Serguei Semenov, Toan Huynh, Thomas Williams, Brian Nicholson, Anna Vasilenko
No abstract text is available yet for this article.
November 30, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27859499/growth-characteristics-of-maize-seeds-exposed-to-magnetic-field
#2
Ananta Vashisth, Devendra Kumar Joshi
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...
November 17, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27862074/three-dimensional-analysis-modeling-and-simulation-of-the-effect-of-static-magnetic-fields-on-neurons
#3
Soheil Hashemi, Ali Abdolali
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 intracellular or extracellular fluids, magnetophoretic force exerted on sensor proteins in ion channels, and magnetophoretic pressure exerted on the membrane and spatial rotation of anisotropic diamagnetic particles...
November 14, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27862067/static-magnetic-field-effects-on-proteases-with-fibrinolytic-activity-produced-by-mucor-subtilissimus
#4
Wendell Albuquerque, Thiago Nascimento, Romero Brandão-Costa, Thiago Fernandes, Ana Porto
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)...
November 14, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27862061/effect-of-static-magnetic-field-on-endospore-germination
#5
Wen Jie Wu, Si Li Liu, Pun To Yung
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, Ca(2+) -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 to SMF...
November 10, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27859403/a-physical-mechanism-of-magnetoreception-extension-and-analysis
#6
Vladimir N Binhi, Frank S Prato
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...
November 8, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27783424/direct-electric-current-modifies-important-cellular-aspects-and-ultrastructure-features-of-candida-albicans-yeasts-influence-of-doses-and-polarities
#7
Gleyce Moreno Barbosa, Eldio Gonçalves Dos Santos, Francielle Neves Carvalho Capella, Fortune Homsani, Carina de Pointis Marçal, Roberta Dos Santos Valle, Érika de Araújo Abi-Chacra, Lys Adriana Braga-Silva, Marcelo Henrique de Oliveira Sales, Inácio Domingos da Silva Neto, Venicio Feo da Veiga, André Luis Souza Dos Santos, Carla Holandino
Available treatments against human fungal pathogens present high levels of resistance, motivating the development of new antifungal therapies. In this context, the present work aimed to analyze direct electric current (DC) antifungal action, using an in vitro apparatus equipped with platinum electrodes. Candida albicans yeast cells were submitted to three distinct conditions of DC treatment (anodic flow-AF; electroionic flow-EIF; and cathodic flow-CF), as well as different charges, ranging from 0.03 to 2.40 C...
October 26, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27770441/effect-of-static-magnetic-field-on-pain-level-and-expression-of-p2x3-receptors-in-the-trigeminal-ganglion-in-mice-following-experimental-tooth-movement
#8
Yafen Zhu, Shengguo Wang, Hu Long, Jingyi Zhu, Fan Jian, Niansong Ye, Wenli Lai
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, 3, 7, and 14 days...
October 21, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27748977/enhancing-cold-atmospheric-plasma-treatment-of-cancer-cells-by-static-magnetic-field
#9
Xiaoqian Cheng, Kenan Rajjoub, Alexey Shashurin, Dayun Yan, Jonathan H Sherman, Ka Bian, Ferid Murad, Michael Keidar
It has been reported since late 1970 that magnetic field interacts strongly with biological systems. Cold atmospheric plasma (CAP) has also been widely studied over the past few decades in physics, biology, and medicine. 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)...
October 17, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27718263/short-wave-therapy-for-spontaneous-pneumothorax-a-case-report
#10
LETTER
Dongmei Ye, Chen Chen, Liang Wang, Mei Shen
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...
October 8, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27716967/estimation-of-dielectric-values-for-tissue-water-in-the-terahertz-range
#11
Alireza Lajevardipour, Andrew W Wood, Robert L McIntosh, Steve Iskra
As the availability of Terahertz (THz) sources and their application expands, interaction with biological material needs to be well-understood. In order to accurately estimate the energy absorption pattern in skin and other tissues in the THz and far Infrared regions, values of dielectric parameters ϵ and σ are required. 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...
October 7, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27711964/effects-of-combined-treatment-with-ibandronate-and-pulsed-electromagnetic-field-on-ovariectomy-induced-osteoporosis-in-rats
#12
Jun Zhou, Yuan Liao, Haitao Xie, Ying Liao, Yahua Zeng, Neng Li, Guanghua Sun, Qi Wu, Guijuan Zhou
Ibandronate (IBN) and pulsed electromagnetic field (PEMF) have each shown positive effects for treating osteoporosis, but no study has evaluated the relative effects of these treatments combined. 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...
October 6, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27706824/variographic-analysis-of-public-exposure-to-electromagnetic-radiation-due-to-cellular-base-stations
#13
Thomas Lemaire, Joe Wiart, Philippe De Doncker
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.
October 5, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27657539/dielectric-properties-of-dog-brain-tissue-measured-in-vitro-across-the-0-3-3%C3%A2-ghz-band
#14
Beadaa Mohammed, Konstanty Bialkowski, Amin Abbosh, Paul C Mills, Andrew P Bradley
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...
September 22, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27657350/magnetic-field-therapy-in-patients-with-cytostatics-induced-polyneuropathy-a-prospective-randomized-placebo-controlled-phase-iii-study
#15
Oliver Rick, Ulrike von Hehn, Eberhard Mikus, Hermann Dertinger, Georg Geiger
No causal treatment for chemotherapy-induced peripheral neuropathy (CIPN) is known. Therefore, there is an urgent need to develop a therapy for CIPN. Only scarce clinical data are available concerning magnetic field therapy (MFT) in this context. We conducted a unicentric, randomized, double-blind, placebo-controlled phase-III trial of an MFT device versus placebo. 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)...
September 22, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27925322/issue-information-page
#16
(no author information available yet)
No abstract text is available yet for this article.
January 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/27859405/effects-of-bmp9-and-pulsed-electromagnetic-fields-on-the-proliferation-and-osteogenic-differentiation-of-human-periodontal-ligament-stem-cells
#17
Tingting Wang, Pei Wang, Zhizhong Cao, Xingxing Wang, Dalin Wang, Yaxian Shen, Da Jing, Erping Luo, Weizhong Tang
Periodontal ligament stem cells (PDLSCs) have been confirmed to have self-renewal capacity and multidifferentiation potential and are good candidates for periodontal tissue regeneration. Pulsed electromagnetic field (PEMF) has been demonstrated to promote osteogenesis in non-union fractures, partly by regulating mesenchymal stem cells or osteoblast activity. However, there is no report about the osteo-inductive effect of PEMF stimulation on human PDLSCs (hPDLSCs). Thus, we tested the hypothesis that PEMF biophysical stimulation alone has an influence on the proliferation and osteogenic differentiation of hPDLSCs...
January 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/27598526/issue-information-page
#18
(no author information available yet)
No abstract text is available yet for this article.
October 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27553635/a-short-term-extremely-low-frequency-electromagnetic-field-exposure-increases-circulating-leukocyte-numbers-and-affects-hpa-axis-signaling-in-mice
#19
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
There is still uncertainty whether extremely low frequency electromagnetic fields (ELF-EMF) can induce health effects like immunomodulation. Despite evidence obtained in vitro, an unambiguous association has not yet been established in vivo. Here, mice were exposed to ELF-EMF for 1, 4, and 24 h/day in a short-term (1 week) and long-term (15 weeks) set-up to investigate whole body effects on the level of stress regulation and immune response. ELF-EMF signal contained multiple frequencies (20-5000 Hz) and a magnetic flux density of 10 μT...
October 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27513309/static-magnetic-field-induced-epigenetic-changes-in-wheat-callus
#20
Murat Aydin, Mahmut Sinan Taspinar, Zeynep Elibol Cakmak, Rahmi Dumlupinar, Guleray Agar
Deoxyribonucleic acid (DNA) is always damaged by endogenous and exogenous factors. Magnetic field (MF) is one of these exogenous factors. When repair mechanisms are not sufficient, mainly because of imbalance in damage or mistakes in repair mechanisms, methylation of DNA results in polymorphism-related abnormalities. 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...
October 2016: Bioelectromagnetics
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