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Bioelectromagnetics

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https://www.readbyqxmd.com/read/29027733/improvement-of-wheat-seed-vitality-by-dielectric-barrier-discharge-plasma-treatment
#1
Qiao Guo, Yiran Meng, Guangzhou Qu, Tiecheng Wang, Fengning Yang, Dongli Liang, Shibin Hu
Influences of discharge voltage on wheat seed vitality were investigated in a dielectric barrier discharge (DBD) plasma system at atmospheric pressure and temperature. Six different treatments were designed, and their discharge voltages were 0.0, 9.0, 11.0, 13.0, 15.0, and 17.0 kV, respectively. Fifty seeds were exposed to the DBD plasma atmosphere with an air flow rate of 1.5 L min(-1) for 4 min in each treatment, and then the DBD plasma-treated seeds were prepared for germination in several Petri dishes...
October 13, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/29023859/effects-of-extremely-low-frequency-magnetic-field-on-the-development-of-tolerance-to-the-analgesic-effect-of-morphine-in-rats
#2
Majid Jadidi, Mahfouzeh Sadat Khatami, Fatemeh Mohammad-Pour, Afsaneh Bandavi, Ali Rashidy-Pour, Abbas Ali Vafaei, Abbas Ali Taherian, Hossein Miladi-Gorji
This study examined the effects of low frequency magnetic field (MF) on tolerance to analgesic effect of morphine in rats. Rats were made tolerant to morphine by injecting morphine (10 mg/kg, s) once daily for 8 consecutive days. Rats were simultaneously exposed to an MF (50 Hz at 1, 50, and 100 μT for 30 min) before, immediately, or 30 min after injection of morphine, and also exposed to a 0.5, 6, 12, and 30 Hz at 100 μT for 30 min before injection of morphine. The percentage of maximum possible effect of morphine (% MPE) was measured on the 1st, 4th, and 8th days by hot plate test...
October 11, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28990199/the-epigenetic-component-of-the-brain-response-to-electromagnetic-stimulation-in-parkinson-s-disease-patients-a-literature-overview
#3
REVIEW
Claudia Consales, Caterina Merla, Carmela Marino, Barbara Benassi
Modulations of epigenetic machinery, namely DNA methylation pattern, histone modification, and non-coding RNAs expression, have been recently included among the key determinants contributing to Parkinson's Disease (PD) aetiopathogenesis and response to therapy. Along this line of reasoning, a set of experimental findings are highlighting the epigenetic-based response to electromagnetic (EM) therapies used to alleviate PD symptomatology, mainly Deep Brain Stimulation (DBS) and Transcranial Magnetic Stimulation (TMS)...
October 9, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28940601/suppression-of-arabidopsis-flowering-by-near-null-magnetic-field-is-mediated-by-auxin
#4
Chunxiao Xu, Yuxia Zhang, Yang Yu, Yue Li, Shufeng Wei
We previously found that flowering of Arabidopsis was suppressed by near-null magnetic field, which was related to cryptochrome. Auxin plays an important role in Arabidopsis flowering. To test whether auxin is involved in the suppression of Arabidopsis flowering by near-null magnetic field, we detected auxin level and expressions of auxin transport and signaling genes in wild-type Arabidopsis plants and cryptochrome double mutant, cry1/cry2, grown in near-null magnetic field. We found that indole-3-acetic acid (IAA) level in roots of wild-type plants in near-null magnetic field was significantly increased compared with the local geomagnetic field control, while IAA level in rosettes of 33-day-old wild-type plants in near-null magnetic field was significantly lower than the control...
September 20, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28898435/wearable-slot-antenna-at-2-45%C3%A2-ghz-for-off-body-radiation-analysis-of-efficiency-frequency-shift-and-body-absorption
#5
Marta Fernandez, Hugo G Espinosa, David V Thiel, Amaia Arrinda
The interaction of body-worn antennas with the human body causes a significant decrease in antenna efficiency and a shift in resonant frequency. A resonant slot in a small conductive box placed on the body has been shown to reduce these effects. The specific absorption rate is less than international health standards for most wearable antennas due to small transmitter power. This paper reports the linear relationship between power absorbed by biological tissues at different locations on the body and radiation efficiency based on numerical modeling (r = 0...
September 12, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28840936/effects-of-static-magnetic-fields-on-the-enteropathogenic-escherichia-coli
#6
María A Quiñones-Peña, Gustavo Tavizon, José L Puente, Claudia Martínez-Anaya, Ulises Hernández-Chiñas, Carlos A Eslava
This study reports the effects of exposing cells of the prototypical enteropathogenic Escherichia coli (EPEC) strain E2348/69 to static magnetic fields (SMF) of varying intensities to observe their capacity to autoaggregate and the effect on cell adherence. The results showed that bacteria exposure over the course of 5 min to an intensity of 53 mT reduced autoaggregation by 28%. However, with intensities of up to 100 mT with the same exposure time, bacteria autoaggregation was reduced by approximately 50%; and after 30 min at the same intensity, it was indistinguishable from that observed in a non-autoaggregative strain...
August 25, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28836692/forced-acoustic-oscillations-of-biological-cell
#7
Aleksandr V Kharlanov
This article considers the possibility of excitation of acoustic oscillations in a cell by electromagnetic waves. In this process, not only the frequency but also the length of a wave is of great importance. It is also reported that the pulse signal can be more effective than harmonic signal, and the pulse length is not essential. In accordance with this fact, it is possible to explain the biological effects of electromagnetic waves and to develop new medical electronic devices. Bioelectromagnetics. 2017;9999:XX-XX...
August 24, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28836682/millimeter-wave-emissivity-as-a-metric-for-the-non-contact-diagnosis-of-human-skin-conditions
#8
Amani Yousef Owda, Neil Salmon, Stuart William Harmer, Sergiy Shylo, Nicholas John Bowring, Nacer Ddine Rezgui, Mamta Shah
A half-space electromagnetic model of human skin over the band 30-300 GHz was constructed and used to model radiometric emissivity. The model showed that the radiometric emissivity rose from 0.4 to 0.8 over this band, with emission being localized to a layer approximately one millimeter deep in the skin. Simulations of skin with differing water contents associated with psoriasis, eczema, malignancy, and thermal burn wounds indicated radiometry could be used as a non-contact technique to detect and monitor these conditions...
August 24, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28833306/pulsed-electromagnetic-fields-promote-the-proliferation-and-differentiation-of-osteoblasts-by-reinforcing-intracellular-calcium-transients
#9
Jie Tong, Lijun Sun, Bin Zhu, Yun Fan, Xingfeng Ma, Liyin Yu, Jianbao Zhang
Pulsed electromagnetic fields (PEMF) can be used to treat bone-related diseases, but the underlying mechanism remains unclear, especially the process by which PEMFs initiate biological effects. In this study, we demonstrated the effects of PEMF on proliferation and differentiation of osteoblasts using the model of calcium transients induced by high extracellular calcium. Our results showed that PEMF can increase both the percentage of responding cells and amplitude of intracellular calcium transients induced by high extracellular calcium stimulation...
August 18, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28799651/thermal-mapping-on-male-genital-and-skin-tissues-of-laptop-thermal-sources-and-electromagnetic-interaction
#10
Mahdi Safari, Navid Mosleminiya, Ali Abdolali
Since the development of communication devices and expansion of their applications, there have been concerns about their harmful health effects. The main aim of this study was to investigate laptop thermal effects caused by exposure to electromagnetic fields and thermal sources simultaneously; propose a nondestructive, replicable process that is less expensive than clinical measurements; and to study the effects of positioning any new device near the human body in steady state conditions to ensure safety by U...
August 11, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28782873/stable-morphological-physiological-and-neural-protein-expression-changes-in-rat-bone-marrow-mesenchymal-stem-cells-treated-with-electromagnetic-field-and-nitric-oxide
#11
Nazanin Haghighat, Parviz Abdolmaleki, Mehrdad Behmanesh, Mohammad Satari
As an external physical factor, electromagnetic field (EMF) may influence cellular processes and nitric oxide (NO) by serving as a secondary messenger molecule in intracellular signaling cascades. Effects of these factors were evaluated simultaneously on viability, morphology, and variation of calcium ion content, and neural protein marker expression in rat bone marrow mesenchymal stem cells (BMSCs). The mesenchymal stem cells were isolated from rat bone marrow and cultured. Deta-NO as a donor molecule of NO was added to cell culture medium after several passages...
August 7, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28782834/magnetosensitivity-of-bacteria-e-coli-magnetic-isotope-and-magnetic-field-effects
#12
Ulyana G Letuta, Vitaly L Berdinskiy
The biological effects of a (25) Mg nuclear spin and weak magnetic fields have been found and studied by using bacterial cells of Escherichia coli (E. coli) grown on standard M9 nutrient media with different isotopes of magnesium: (24) Mg, (25) Mg, (26) Mg, and a natural mixture of Mg isotopes. Among these isotopes only (25) Mg has a nuclear spin I = 5/2 and nuclear magnetic moment which have been known to affect enzymatic processes in vitro due to hyperfine interactions with uncoupled electrons of substrates...
August 7, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28741320/differential-intensity-dependent-effects-of-pulsed-electromagnetic-fields-on-rankl-induced-osteoclast-formation-apoptosis-and-bone-resorbing-ability-in-raw264-7-cells
#13
Pan Wang, Juan Liu, Yuefan Yang, Mingming Zhai, Xi Shao, Zedong Yan, Xuhui Zhang, Yan Wu, Lu Cao, Bingdong Sui, Erping Luo, Da Jing
Pulsed electromagnetic fields (PEMF) have been proven to be effective for promoting bone mass and regulating bone turnover both experimentally and clinically. However, the exact mechanisms for the regulation of PEMF on osteoclastogenesis as well as optical exposure parameters of PEMF on inhibiting osteoclastic activities and functions remain unclear, representing significant limitations for extensive scientific application of PEMF in clinics. In this study, RAW264.7 cells incubated with RANKL were exposed to 15 Hz PEMF (2 h/day) at various intensities (0...
July 24, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28741293/the-2016-most-influential-bioelectromagnetics-journal-paper-by-citation-award
#14
EDITORIAL
James C Lin
No abstract text is available yet for this article.
July 24, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28715607/variation-in-the-dielectric-properties-of-freshly-excised-colorectal-cancerous-tissues-at-different-tumor-stages
#15
Zhou Li, Weiwei Wang, Zhai Cai, Shuai Han, Shiming Lin, Linyun He, Miaoliang Chen, Dongyue Pan, Guanhua Deng, Song Duan, Sherman Xuegang Xin
The study was designed to identify differences in the dielectric properties of ex vivo colorectal cancerous tissues at different tumor stages. To date, 130 freshly excised colorectal cancerous specimens underwent measurement of both relative permittivity and conductivity on the serosal and mucosal surfaces of the carcinoma nidus, and the mucosa of the surgical resection margin ranging from 50 to 500 MHz at the Larmor frequencies. Tumor node metastasis staging was determined according to pathological reports for each patient...
July 17, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28715606/enzymatic-mechanisms-of-biological-magnetic-sensitivity
#16
Ulyana G Letuta, Vitaly L Berdinskiy, Chikako Udagawa, Yoshifumi Tanimoto
Primary biological magnetoreceptors in living organisms is one of the main research problems in magnetobiology. Intracellular enzymatic reactions accompanied by electron transfer have been shown to be receptors of magnetic fields, and spin-dependent ion-radical processes can be a universal mechanism of biological magnetosensitivity. Magnetic interactions in intermediate ion-radical pairs, such as Zeeman and hyperfine (HFI) interactions, in accordance with proposed strict quantum mechanical theory, can determine magnetic-field dependencies of reactions that produce biologically important molecules needed for cell growth...
July 17, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28708936/hybrid-model-for-the-personal-exposure-meter-response-in-an-outdoor-environment
#17
Jung-Hwan Hwang, Sang-Il Kwak, Jong-Hwa Kwon, Hyung-Do Choi
When a personal exposure meter (PEM) is worn by a human subject, the electric-field strength measured at the PEM is affected by a body shadowing effect. In our study, a hybrid model is proposed for modeling the body shadowing effect for when the PEM is used in an outdoor environment. The hybrid model contains responses to direct and diffused waves, the factors related to the transmission path and cross-polarization discrimination, respectively. To derive the hybrid model, responses for the direct and diffused waves are measured using a human phantom in an anechoic chamber and a reverberation chamber, respectively...
July 14, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28700087/influence-of-340%C3%A2-mt-static-magnetic-field-on-germination-potential-and-mid-infrared-spectrum-of-wheat
#18
Saša Ćirković, Jasmina Bačić, Novica Paunović, Tamara B Popović, Alexander M Trbovich, Nebojša Romčević, Jasna L Ristić-Djurović
In a number of studies, a static magnetic field was observed to positively influence the growing process of various plants; however, the effect has not yet been related to possible structural changes. We investigate if the static magnetic field that improves germination of wheat also alters wheat's near-infrared spectrum. Two groups of seeds were exposed to 340 mT for 16 h cumulatively. The first group was exposed 8 days for 2 h per day, while the second group was exposed 4 h per day for 4 consecutive days...
July 12, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28665487/effects-of-pulsed-electromagnetic-fields-on-postmenopausal-osteoporosis
#19
REVIEW
Siyi Zhu, Hongchen He, Chi Zhang, Haiming Wang, Chengfei Gao, Xijie Yu, Chengqi He
Postmenopausal osteoporosis (PMOP) is considered to be a well-defined subject that has caused high morbidity and mortality. In elderly women diagnosed with PMOP, low bone mass and fragile bone strength have been proven to significantly increase risk of fragility fractures. Currently, various anabolic and anti-resorptive therapies have been employed in an attempt to retain healthy bone mass and strength. Pulsed electromagnetic fields (PEMFs), first applied in treating patients with delayed fracture healing and nonunions, may turn out to be another potential and effective therapy for PMOP...
September 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28636777/biological-effects-related-to-geomagnetic-activity-and-possible-mechanisms
#20
Viacheslav V Krylov
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
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