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Electromagnetic Biology and Medicine

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https://www.readbyqxmd.com/read/29902088/multivariable-quantitative-relation-between-cell-viability-and-the-exposure-parameters-of-9-33-ghz-rf-emp-irradiation
#1
Xianghui Wang, Hongxin Qi, Jie Zhang, Jian Pei, Lifang Sun, Shude Chen
Qualitative analysis of the influence of a certain exposure parameter is commonly performed in bioelectromagnetic studies. However, since the exposure condition requires the control of multiple parameters, the diverse results caused by different combinations of these parameters requires further quantitative study of the multivariable (exposure parameters)-bioeffect relation to identify the rule describing bioelectromagnetic effects. The present work investigated the relation between cell viability and the three main exposure parameters (electric intensity (Es ), pulse duration (τ) and pulse number (N)) of 9...
June 14, 2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29846098/cytotoxicity-of-carboplatin-on-human-glioblastoma-cells-is-reduced-by-the-concomitant-exposure-to-an-extremely-low-frequency-electromagnetic-field-50-hz-70-g
#2
Maryam Amiri, Mohsen Basiri, Hossein Eskandary, Zeinab Akbarnejad, Marzie Esmaeeli, Yaser Masoumi-Ardakani, Meysam Ahmadi-Zeidabadi
Glioblastoma multiforme (GBM) is a malignant brain cancer that causes high mortality in patients. GBM responds weakly to the common cancer treatments such as chemotherapy and radiotherapy and even surgery. Carboplatin is an alkylating agent widely used to treat cancer. However, resistance to this drug is a common problem in its use in cancer treatment. Concomitant exposure to extremely low-frequency electromagnetic fields (ELF-EMFs) and carboplatin is one unexplored possibility for overcoming this resistance...
May 30, 2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29771571/effect-of-weak-combined-static-and-extremely-low-frequency-alternating-magnetic-fields-on-spatial-memory-and-brain-amyloid-%C3%AE-in-two-animal-models-of-alzheimer-s-disease
#3
Natalia V Bobkova, Vadim V Novikov, Natalia I Medvinskaya, Irina Y Aleksandrova, Inna V Nesterova, Eugenii E Fesenko
Subchronic effect of a weak combined magnetic field (MF), produced by superimposing a constant component, 42 µT and an alternating MF of 0.08 µT, which was the sum of two frequencies of 4.38 and 4.88 Hz, was studied in olfactory bulbectomized (OBE) and transgenic Tg (APPswe, PSEN1) mice, which were used as animal models of sporadic and heritable Alzheimer's disease (AD) accordingly. Spatial memory was tested in a Morris water maze on the following day after completion of training trials with the hidden platform removed...
May 17, 2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29708772/evaluation-of-femoral-perfusion-using-dynamic-contrast-enhanced-mri-after-simultaneous-initiation-of-electrical-stimulation-and-steroid-treatment-in-an-osteonecrosis-model
#4
Hiroki Yamamoto, Keiichiro Ueshima, Masazumi Saito, Kazuya Ikoma, Masashi Ishida, Tsuyoshi Goto, Shigeki Hayashi, Akira Ikegami, Mikihiro Fujioka, Osam Mazda, Toshikazu Kubo
This study aimed to evaluate femoral perfusion using dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) for two weeks after the simultaneous initiation of electrical stimulation (ES) and steroid treatment in a steroid-induced osteonecrosis (ON) model. A single dose of methylprednisolone was injected into 14 rabbits. Seven rabbits underwent ES (ES group), and seven rabbits did not (control group). DCE-MRI was performed before steroid administration and 1, 5, 10, and 14 days after steroid administration...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29708457/a-proposed-explanation-for-thunderstorm-asthma-and-leukemia-risk-near-high-voltage-power-lines-a-supported-hypothesis
#5
Mary Redmayne
Thunderstorm asthma and increased childhood leukemia risk near high-voltage power lines (HVPL) are occurrences whose mechanism of effect is not fully understood. This paper proposes and discusses a key similarity: both thunderstorms and HVPL generate a high enough electrical field in the environment to ionize nearby air and air-borne particles. I argue that the repeatedly demonstrated acute asthma response to pollen-laden air during thunderstorms is largely due to ionization of air-borne allergens, which adhere more readily and in greater quantity in the lungs than non-ionized particles...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29667447/exposure-to-non-ionizing-electromagnetic-fields-emitted-from-mobile-phones-induced-dna-damage-in-human-ear-canal-hair-follicle-cells
#6
Mehmet Akdag, Suleyman Dasdag, Fazile Canturk, Mehmet Zulkuf Akdag
The aim of this study was to investigate effect of radiofrequency radiation (RFR) emitted from mobile phones on DNA damage in follicle cells of hair in the ear canal. The study was carried out on 56 men (age range: 30-60 years old)in four treatment groups with n = 14 in each group. The groups were defined as follows: people who did not use a mobile phone (Control), people use mobile phones for 0-30 min/day (second group), people use mobile phones for 30-60 min/day (third group) and people use mobile phones for more than 60 min/day (fourth group)...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29621414/magnetic-field-direction-differentially-impacts-the-growth-of-different-cell-types
#7
Xiaofei Tian, Dongmei Wang, Meng Zha, Xingxing Yang, Xinmiao Ji, Lei Zhang, Xin Zhang
Magnetic resonance imaging (MRI) machines have horizontal or upright static magnetic field (SMF) of 0.1-3 T (Tesla) at sites of patients and operators, but the biological effects of these SMFs still remain elusive. We examined 12 different cell lines, including 5 human solid tumor cell lines, 2 human leukemia cell lines and 4 human non-cancer cell lines, as well as the Chinese hamster ovary cell line. Permanent magnets were used to provide 0.2-1 T SMFs with different magnetic field directions. We found that an upward magnetic field of 0...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29617158/effects-of-static-magnetic-fields-on-bone-microstructure-and-mechanical-properties-in-mice
#8
Jian Zhang, Xiaofeng Meng, Chong Ding, Peng Shang
All the living organisms originate, evolve and live under geomagnetic field (GMF, 20-70 µT). With rapid development in science and technology, exposure to various static magnetic fields (SMFs) from natural and man-made sources remains a public environmental topic in consideration of its probable health risk for humans. Many animal studies related to health effect have demonstrated that SMF could improve bone formation and enhance bone healing. Moreover, most of the studies focused on local SMF generated by rod-type magnet...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29513614/extremely-low-frequency-variable-electromagnetic-fields-affect-cancer-and-noncancerous-cells-in-vitro-differently-preliminary-study
#9
Anna Koziorowska, Maria Romerowicz-Misielak, Przemysław Sołek, Marek Koziorowski
The exposure to extremely low frequency electromagnetic field (ELF-EMF) may result in various changes at the cellular level. To identify the effect of ELF-EMF exposure on viability of cells, cancer cells (U87-MG; 143B) and noncancerous cells (BJ; HEK) in exponential growth phase were exposed or sham-exposed to different values of frequency (2, 20, 30, 50 and 60 Hz), different shapes (sinusoidal, square and triangular) and time of exposure (0.5, 1, 2, 3 h) to electromagnetic field. After exposure, viability of cells was detected by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT)...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29493302/intensity-time-dependence-dosing-criterion-in-the-emf-exposure-guidelines-in-russia
#10
Nina Rubtsova, Yuriy Paltsev, Sergey Perov, Elena Bogacheva
Major approaches of the Russian Federation in setting of exposure guidelines to electromagnetic fields (EMF) in occupational and public environments are discussed in this paper. EMF exposure guidelines in Russia are based on the results of hygienic, clinical, physiological, epidemiological and experimental studies and are frequency-dependent. The concept of a threshold principle of occupational and environmental factors due to hazardous exposure effects has been used to set permissible exposure levels of different EMF frequency ranges...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29420080/calcium-ion-cyclotron-resonance-in-dissipative-water-structures
#11
Alexander Pazur
Weak magnetic and electromagnetic fields affect physiological processes in animals, plants, and microorganisms. Ion cyclotron resonance (ICR) is discussed as one of the sensitive mechanisms, which enable perception of the geomagnetic field and its orientation. Numerous biological effects are observed involving several small ions, showing windows of predicted frequencies and intensities. The pioneering work of Guiliano Preparata and Emilio Del Giudice using quantum electrodynamics showed that spontaneously originating coherent regions in water facilitate ICR effects at incoherent water phase boundaries...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29400585/fatal-collision-are-wireless-headsets-a-risk-in-treating-patients
#12
Cindy Sage, Lennart Hardell
Wireless-enabled headsets that connect to the internet can provide remote transcribing of patient examination notes. Audio and video can be captured and transmitted by wireless signals sent from the computer screen in the frame of the glasses. But using wireless glass-type devices can expose the user to a specific absorption rates (SAR) of 1.11-1.46 W/kg of radiofrequency radiation. That RF intensity is as high as or higher than RF emissions of some cell phones. Prolonged use of cell phones used ipsilaterally at the head has been associated with statistically significant increased risk of glioma and acoustic neuroma...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29308934/seed-germination-of-medicinal-sage-is-affected-by-gibberellic-acid-magnetic-field-and-laser-irradiation
#13
A Abdani Nasiri, F Mortazaeinezhad, R Taheri
Proper priming techniques are among the most important methods for increasing seed germination and seedling growth. Three experiments were conducted to investigate the effects of plant hormone (500 and 1000 mg/L gibberellic acid (GA)), magnetic field (3, 15, 30 mili Tesla (mT)) and laser irradiation at 650 nm (200 mW) on the germination and the growth of Salvia officinalis. We examined the plumule and radical length, plumule and radical fresh weight, plumule and radical dry weight, germination percentage, germination rate and seed vigor...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29308927/skin-thermophysiological-effects-of-448-khz-capacitive-resistive-monopolar-radiofrequency-in-healthy-adults-a-randomised-crossover-study-and-comparison-with-pulsed-shortwave-therapy
#14
Binoy Kumaran, Tim Watson
Radiofrequency-based electrophysical agents (EPA) have been used in therapy practice over several decades (e.g., shortwave therapies). Currently, there is insufficient evidence supporting such devices operating below shortwave frequencies. This laboratory-based study investigated the skin physiological effects of 448 kHz capacitive resistive monopolar radiofrequency (CRMRF) and compared them to pulsed shortwave therapy (PSWT). In a randomised crossover study, seventeen healthy volunteers received four treatment conditions - High, Low and Placebo dose conditions receiving 15-min CRMRF treatment and a Control condition receiving no intervention...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29308914/numerical-study-to-establish-relationship-between-coagulation-volume-and-target-tip-temperature-during-temperature-controlled-radiofrequency-ablation
#15
Sundeep Singh, Ramjee Repaka
The present study aims at proposing a relationship between the coagulation volume and the target tip temperature in different tissues (viz., liver, lung, kidney, and breast) during temperature-controlled radiofrequency ablation (RFA). A 20-min RFA has been modelled using commercially available monopolar multi-tine electrode subjected to different target tip temperatures that varied from 70°C to 100°C with an increment of 10°C. A closed-loop feedback proportional-integral-derivative (PID) controller has been employed within the finite element model to perform temperature-controlled RFA...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29235883/nitric-oxide-modulates-the-responses-of-osteoclast-formation-to-static-magnetic-fields
#16
Jian Zhang, Chong Ding, Xiaofeng Meng, Peng Shang
Nitric oxide (NO) is involved in osteoclast differentiation. Our previous studies showed that static magnetic fields (SMFs) could affect osteoclast differentiation. The inhibitory effects of 16 T of high SMF (HiMF) on osteoclast differentiation was correlated with increased production of NO. We raised the hypothesis that NO mediated the regulatory role of SMFs on osteoclast formation. In this study, 500 nT of hypomagnetic field (HyMF), 0.2 T of moderate SMF (MMF) and 16 T of high SMF (HiMF) were utilized as SMF treatment...
2018: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29140736/extremely-low-frequency-magnetic-field-protects-injured-spinal-cord-from-the-microglia-and-iron-induced-tissue-damage
#17
Soumil Dey, Samrat Bose, Suneel Kumar, Ravinder Rathore, Rashmi Mathur, Suman Jain
Spinal cord injury (SCI) is insult to the spinal cord, which results in loss of sensory and motor function below the level of injury. SCI results in both immediate mechanical damage and secondary tissue degeneration. Following traumatic insult, activated microglia release proinflammatory cytokines and excess iron due to hemorrhage, initiating oxidative stress that contributes to secondary degeneration. Literature suggests that benefits are visible with the reduction in concentration of iron and activated microglia in SCI...
November 15, 2017: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29087742/numerical-evaluation-of-rf-induced-heating-for-various-esophageal-stent-designs-under-mri-1-5-tesla-system
#18
Xiaohe Ji, Jianfeng Zheng, Ji Chen
This paper presents a numerical investigation of radio frequency (RF)-induced heating for various esophageal stent designs under magnetic resonance imaging (MRI). The length, patterns and insulation layer as well as the radius of the wire are comprehensively evaluated. It is shown that different stent designs can alter the induced current distributions on the stent and consequently its corresponding heating. Detailed discussions on these factors on RF heating are presented.
October 31, 2017: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29087732/interaction-between-pancreatic-%C3%AE-cell-and-electromagnetic-fields-a-systematic-study-toward-finding-the-natural-frequency-spectrum-of-%C3%AE-cell-system
#19
Sajjad Farashi
Interaction between biological systems and environmental electric or magnetic fields has gained attention during the past few decades. Although there are a lot of studies that have been conducted for investigating such interaction, the reported results are considerably inconsistent. Besides the complexity of biological systems, the important reason for such inconsistent results may arise due to different excitation protocols that have been applied in different experiments. In order to investigate carefully the way that external electric or magnetic fields interact with a biological system, the parameters of excitation, such as intensity or frequency, should be selected purposefully due to the influence of these parameters on the system response...
October 31, 2017: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/29068238/influence-of-magnetopriming-on-germination-growth-physiology-oil-and-essential-contents-of-cumin-cuminum-cyminum-l
#20
Jamshid Razmjoo, Sara Alinian
An environment friendly technique is desirable for enhancing of crop production. In this study, seeds of cumin (Cuminum cyminum L.) Yazd accession were treated with 0, 150 mT, 250 mT, 500 mT and 1 T magnetic field strengths for min and germination parameters were determined. All of the treatments improved germination parameters and seedling growth as compared with the control. However, 500 and 150 mT were the most effective treatments and thus selected for field studies. Seeds were exposed to 150 mT and 500 mT static magnetic field of strengths for 12 min, planted in the field during 2010-2012 in Isfahan, Iran...
October 25, 2017: Electromagnetic Biology and Medicine
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