Bioelectromagnetics最新文献_第7页

Radiofrequency Exposure Levels in Greece 希腊的射频暴露水平

IF 1.9 3区生物学

Bioelectromagnetics Pub Date : 2023-02-14 DOI: 10.1002/bem.22434

Charilaos Tyrakis, Kiki Theodorou, Yiannis Kiouvrekis, Aris Alexias, Constantin Kappas

{"title":"Radiofrequency Exposure Levels in Greece","authors":"Charilaos Tyrakis, Kiki Theodorou, Yiannis Kiouvrekis, Aris Alexias, Constantin Kappas","doi":"10.1002/bem.22434","DOIUrl":"10.1002/bem.22434","url":null,"abstract":"Medical Physics Department (Medical School, University of Thessaly) participated in a Greek National EMF research program (EDBM34) with the scope to measure and evaluate radiofrequency (RF) exposure (27–3000 MHz) in areas of sensitive land use. A thousand (1000) measurements were carried out at two “metropolitan locations” (Athens and Thessaloniki: 624 points) and several rest urban/rural locations (376 points). SRM 3006 spectrum analyzer manufactured by Narda Safety Test Solutions was used. The broadband mean electric field in metropolitan areas was 0.41 V/m, while in the rest of Greece was 0.36 V/m. In metropolitan areas, the predominant RF source was the TV and Radio FM signals (36.2% mean contribution to the total RF exposure level). In the rest areas, the predominant source was the systems of the meteorological and military/defensive service (31.1%). The mobile sector contributed 14.9% in metropolitan areas versus 12.2% in the rest of Greece. The predominant mobile source was 900 MHz in both cases (4.5% in metropolitan areas vs. 3.3% in the rest of Greece). The total exposure from all RF sources complied with the International Commission on Non-Ionizing Radiation Protection (ICNIRP) 2020 safety guidelines [ICNIRP, 2020]. The maximum exposure level was 0.129% of the limit for the metropolitan areas vs. 0.110% for the rest of Greece. Nonremarkable differences between metropolitan areas' exposure and the rest of Greece. In most cases, new 5 G antennas will be added to the existing base stations. Thus, the total exposure may be increased, leading to higher safety distances. © 2023 Bioelectromagnetics Society.","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"44 1-2","pages":"17-25"},"PeriodicalIF":1.9,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9179259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Review of Aspects of Synaptic Plasticity in Hippocampus via mT Extremely Low-Frequency Magnetic Fields 极低频磁场对海马突触可塑性的研究进展

IF 1.9 3区生物学

Bioelectromagnetics Pub Date : 2023-02-14 DOI: 10.1002/bem.22437

Lei Dong, Pei Xia, Lei Tian, Chunxiao Tian, Wenjun Zhao, Ling Zhao, Jiakang Duan, Yuhan Zhao, Yu Zheng

{"title":"A Review of Aspects of Synaptic Plasticity in Hippocampus via mT Extremely Low-Frequency Magnetic Fields","authors":"Lei Dong, Pei Xia, Lei Tian, Chunxiao Tian, Wenjun Zhao, Ling Zhao, Jiakang Duan, Yuhan Zhao, Yu Zheng","doi":"10.1002/bem.22437","DOIUrl":"10.1002/bem.22437","url":null,"abstract":"The subthreshold magnetic modulation technique stimulates cells with mT extremely low-frequency magnetic fields (ELF-MFs), which are insufficient to induce neuronal action potentials. Although they cannot directly induce resting neurons to discharge, mT magnetic stimulation can regulate the excitability of the nervous system, which regulates learning and memory by some unknown mechanisms. Herein, we describe the regulation of mT ELF-MFs with different parameters on synaptic plasticity in hippocampal neurons. Additionally, we summarize the latest research on the possible mechanism of the effect of ELF-MFs on synaptic plasticity. Some studies have shown that ELF-MFs are able to inhibit long-term potentiation (LTP) by increasing concentration of intracellular Ca2+ concentration ([Ca2+]i), as well as concentration of reactive oxygen species. The research in this paper has significance for the comprehensive understanding of relevant neurological mechanisms of learning and memory by mT ELF-MFs stimulation. However, more high-quality research is necessary to determine the regulatory mechanism of mT ELF-MFs on synaptic plasticity in order to optimize this technique as a treatment for neurological diseases. © 2023 Bioelectromagnetics Society.","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"44 3-4","pages":"63-70"},"PeriodicalIF":1.9,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9697194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Evaluation of Viral Inactivation on Dry Surface by High Peak Power Microwave (HPPM) Exposure 高峰值功率微波(HPPM)对干燥表面病毒灭活的评价

IF 1.9 3区生物学

Bioelectromagnetics Pub Date : 2023-02-14 DOI: 10.1002/bem.22435

Ibtissam Echchgadda, Jody C. Cantu, Joey Butterworth, Bryan Gamboa, Ronald Barnes, David A. Freeman, Francis A. Ruhr, Weston C. Williams, Leland R. Johnson, Jason Payne, Robert J. Thomas, William P. Roach, Bennett L. Ibey

{"title":"Evaluation of Viral Inactivation on Dry Surface by High Peak Power Microwave (HPPM) Exposure","authors":"Ibtissam Echchgadda, Jody C. Cantu, Joey Butterworth, Bryan Gamboa, Ronald Barnes, David A. Freeman, Francis A. Ruhr, Weston C. Williams, Leland R. Johnson, Jason Payne, Robert J. Thomas, William P. Roach, Bennett L. Ibey","doi":"10.1002/bem.22435","DOIUrl":"10.1002/bem.22435","url":null,"abstract":"Previous research has shown that virus infectivity can be dramatically reduced by radio frequency exposure in the gigahertz (GHz) frequency range. Given the worldwide SARS-CoV-2 pandemic, which has caused over 1 million deaths and has had a profound global economic impact, there is a need for a noninvasive technology that can reduce the transmission of virus among humans. RF is a potential wide area-of-effect viral decontamination technology that could be used in hospital rooms where patients are expelling virus, in grocery and convenience stores where local populations mix, and in first responder settings where rapid medical response spans many potentially infected locations within hours. In this study, we used bovine coronavirus (BCoV) as a surrogate of SARS-CoV-2 and exposed it to high peak power microwave (HPPM) pulses at four narrowband frequencies: 2.8, 5.6, 8.5, and 9.3 GHz. Exposures consisted of 2 µs pulses delivered at 500 Hz, with pulse counts varied by decades between 1 and 10,000. The peak field intensities (i.e. the instantaneous power density of each pulse) ranged between 0.6 and 6.5 MW/m2, depending on the microwave frequency. The HPPM exposures were delivered to plastic coverslips containing BCoV dried on the surface. Hemagglutination (HA) and cytopathic effect analyses were performed 6 days after inoculation of host cells to assess viral infectivity. No change in viral infectivity was seen with increasing dose (pulse number) across the tested frequencies. Under all conditions tested, exposure did not reduce infectivity more than 1.0 log10. For the conditions studied, high peak power pulsed RF exposures in the 2–10 GHz range appear ineffective as a virucidal approach for hard surface decontamination. © 2023 Bioelectromagnetics Society.","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"44 1-2","pages":"5-16"},"PeriodicalIF":1.9,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9179261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Issue Information - Page 发行信息-页面

IF 1.9 3区生物学

Bioelectromagnetics Pub Date : 2022-12-26 DOI: 10.1002/bem.22432

引用次数: 0

Exposure to 10 Hz Pulsed Magnetic Field Induced Slight Apoptosis and Reactive Oxygen Species in Primary Human Gingival Fibroblasts 暴露于10hz脉冲磁场诱导原代人牙龈成纤维细胞轻微凋亡和活性氧

IF 1.9 3区生物学

Bioelectromagnetics Pub Date : 2022-12-09 DOI: 10.1002/bem.22428

Zheng Huang, Cheng Ding, Xinzhao Huang, Chuan Sun, Liangjun Zhong

引用次数: 0

Effect of 40 Hz Magnetic Field Application in Posttraumatic Muscular Atrophy Development on Muscle Mass and Contractions in Rats 40hz磁场对创伤后肌萎缩发育大鼠肌肉质量和收缩的影响

IF 1.9 3区生物学

Bioelectromagnetics Pub Date : 2022-12-07 DOI: 10.1002/bem.22429

Figen Cicek, Bora Tastekin, Ilknur Baldan, Murat Tokus, Aykut Pelit, Isil Ocal, Ismail Gunay, Hasan U. Ogur, Hakan Cicek

{"title":"Effect of 40 Hz Magnetic Field Application in Posttraumatic Muscular Atrophy Development on Muscle Mass and Contractions in Rats","authors":"Figen Cicek, Bora Tastekin, Ilknur Baldan, Murat Tokus, Aykut Pelit, Isil Ocal, Ismail Gunay, Hasan U. Ogur, Hakan Cicek","doi":"10.1002/bem.22429","DOIUrl":"10.1002/bem.22429","url":null,"abstract":"Muscle atrophy refers to the deterioration of muscle tissue due to a long-term decrease in muscle function. In the present study, we simulated rectus femoris muscle atrophy experimentally and investigated the effect of pulsed electromagnetic field (PEMF) application on the atrophy development through muscle mass, maximal contraction force, and contraction–relaxation time. A quadriceps tendon rupture with a total tenotomy was created on the rats’ hind limbs, inhibiting knee extension for 6 weeks, and this restriction of the movement led to the development of disuse atrophy, while the control group underwent no surgery. The operated and control groups were divided into subgroups according to PEMF application (1.5 mT for 45 days) or no PEMF. All groups were sacrificed after 6 weeks and had their entire rectus femoris removed. To measure the contraction force, the muscles were placed in an organ bath connected to a transducer. As a result of the atrophy, muscle mass and strength were reduced in the operated group, while no muscle mass loss was observed in the operated PEMF group. Furthermore, measurements of single, incomplete and full tetanic contraction force and contraction time (CT) did not change significantly in the operated group that received the PEMF application. The PEMF application prevented atrophy resulting from 6 weeks of immobility, according to the contraction parameters. The effects of PEMF on contraction force and CT provide a basis for further studies in which PEMF is investigated as a noninvasive therapy for disuse atrophy development. © 2022 Bioelectromagnetics Society.","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"43 8","pages":"453-461"},"PeriodicalIF":1.9,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10434682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hypomagnetic Field Exposure Affecting Gut Microbiota, Reactive Oxygen Species Levels, and Colonic Cell Proliferation in Mice 低磁场暴露对小鼠肠道微生物群、活性氧水平和结肠细胞增殖的影响

IF 1.9 3区生物学

Bioelectromagnetics Pub Date : 2022-11-26 DOI: 10.1002/bem.22427

Aisheng Zhan, Yukai Luo, Huafeng Qin, Wei Lin, Lanxiang Tian

{"title":"Hypomagnetic Field Exposure Affecting Gut Microbiota, Reactive Oxygen Species Levels, and Colonic Cell Proliferation in Mice","authors":"Aisheng Zhan, Yukai Luo, Huafeng Qin, Wei Lin, Lanxiang Tian","doi":"10.1002/bem.22427","DOIUrl":"10.1002/bem.22427","url":null,"abstract":"The gut microbiota has been considered one of the key factors in host health, which is influenced by many environmental factors. The geomagnetic field (GMF) represents one of the important environmental conditions for living organisms. Previous studies have shown that the elimination of GMF, the so-called hypomagnetic field (HMF), could affect the physiological functions and resistance to antibiotics of some microorganisms. However, whether long-term HMF exposure could alter the gut microbiota to some extent in mammals remains unclear. Here, we investigated the effects of long-term (8- and 12-week) HMF exposure on the gut microbiota in C57BL/6J mice. Our results clearly showed that 8-week HMF significantly affected the diversity and function of the mouse gut microbiota. Compared with the GMF group, the concentrations of short-chain fatty acids tended to decrease in the HMF group. Immunofluorescence analysis showed that HMF promoted colonic cell proliferation, concomitant with an increased level of reactive oxygen species (ROS). To our knowledge, this is the first in vivo finding that long-term HMF exposure could affect the mouse gut microbiota, ROS levels, and colonic cell proliferation in the colon. Moreover, the changes in gut microbiota can be restored by returning mice to the GMF environment, thus the possible harm to the microbiota caused by HMF exposure can be alleviated. © 2022 Bioelectromagnetics Society.","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"43 8","pages":"462-475"},"PeriodicalIF":1.9,"publicationDate":"2022-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10544554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Issue Information - Page 发行信息-页面

IF 1.9 3区生物学

Bioelectromagnetics Pub Date : 2022-11-24 DOI: 10.1002/bem.22430

引用次数: 0

Effect of the Pulsed Electromagnetic Field Treatment in a Rat Model of Senile Osteoporosis In Vivo 脉冲电磁场对体内老年性骨质疏松大鼠模型的影响

IF 1.9 3区生物学

Bioelectromagnetics Pub Date : 2022-11-20 DOI: 10.1002/bem.22423

Jun Zhou, Jinling Wang, Mengjian Qu, Xiarong Huang, Linwei Yin, Yang Liao, Fujin Huang, Pengyun Ning, Peirui Zhong, Yahua Zeng

{"title":"Effect of the Pulsed Electromagnetic Field Treatment in a Rat Model of Senile Osteoporosis In Vivo","authors":"Jun Zhou, Jinling Wang, Mengjian Qu, Xiarong Huang, Linwei Yin, Yang Liao, Fujin Huang, Pengyun Ning, Peirui Zhong, Yahua Zeng","doi":"10.1002/bem.22423","DOIUrl":"10.1002/bem.22423","url":null,"abstract":"This study assessed the effects of pulsed electromagnetic fields (PEMF) in a rat model of senile osteoporosis and the underlying molecular events. 24-month-old male Sprague–Dawley (SD) rats were randomly divided into control and PEMF groups (n = 8 per group) using a random digit table, while 3-month-old male SD rats were set as the young-age control group. Rats in the PEMF group were treated by PEMF for 40 min/day for 5 days/week. Bone mineral density/microarchitecture, level of serum bone-specific alkaline phosphatase (BALP), tartrate-resistant acid phosphatase 5b (TRACP5b), and Wnt/β-catenin signaling genes in rat bone marrow cells were then analyzed. The 12-week PEMF intervention showed a significant effect on inhibition of age-induced bone density loss and deterioration of trabecular bone structures in the PEMF group rats versus control rats, that is, the treatment enhanced bone mineral density of the proximal femoral metaphysis and the fifth lumbar (L5) vertebral body and improved the proximal tibia and L4 vertebral body parameters using bone histomorphometry analysis. Furthermore, the BALP level in the bones was significantly increased, but the TRACP5b level was reduced in the PEMF group of rats versus control rats. PEMF also dramatically upregulated expression of Wnt3a, LRP5, β-catenin, and Runx2 but downregulated PPAR-γ expression in the aged rats. The results demonstrated that PEMF could prevent bone loss and architectural deterioration due to the improvement of bone marrow mesenchymal stromal cell differentiation and proliferation abilities and activating the Wnt signaling pathway. Future clinical studies are needed to validate these findings. © 2022 Bioelectromagnetics Society.","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"43 7","pages":"438-447"},"PeriodicalIF":1.9,"publicationDate":"2022-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40476850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Pilot Study Evaluating the Feasibility of Testing for an Acute Impact of Human Exposure to a Power-line Frequency Magnetic Field on Blood Cortisol and Thyroid-Stimulating Hormone 一项评估人体暴露于电力线频率磁场对血液皮质醇和促甲状腺激素急性影响测试可行性的试点研究

IF 1.9 3区生物学

Bioelectromagnetics Pub Date : 2022-11-20 DOI: 10.1002/bem.22426

Alexandre Legros, Michael Corbacio, Sébastien Villard, Martine Souques, Jacques Lambrozo

{"title":"A Pilot Study Evaluating the Feasibility of Testing for an Acute Impact of Human Exposure to a Power-line Frequency Magnetic Field on Blood Cortisol and Thyroid-Stimulating Hormone","authors":"Alexandre Legros, Michael Corbacio, Sébastien Villard, Martine Souques, Jacques Lambrozo","doi":"10.1002/bem.22426","DOIUrl":"10.1002/bem.22426","url":null,"abstract":"Numerous studies have been carried out on the potential effects of an extremely low frequency (ELF—0–300 Hz) magnetic field (MF) on human health. However, there is limited data on the effect of a high exposure level to ELF MFs for a prolonged period. Therefore, the objective of this pilot work was to demonstrate the feasibility of a study evaluating the stress hormone concentrations resulting from a 10-min exposure to a 60 Hz MF of several tens of thousands of µT. In this pilot study, human volunteers were thus exposed for the first time to a 60 Hz, 50 mT MF for a duration of 10 min. Stress hormone levels were measured before (once), during (twice) and after (once) this 10-min exposure period. The small sample size (n = 5) did not allow to conduct standard inferential statistical tests and no conclusion regarding the exposure effects can be drawn. However, this study demonstrates the feasibility of using a simple blood testing material in a protocol testing for the effect of a 10-min exposure to a high MF level in healthy human volunteers. © 2022 Bioelectromagnetics Society.","PeriodicalId":8956,"journal":{"name":"Bioelectromagnetics","volume":"43 7","pages":"399-403"},"PeriodicalIF":1.9,"publicationDate":"2022-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9828214/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10512885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0