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Pulsed electromagnetic field

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https://www.readbyqxmd.com/read/28539622/high-visibility-first-order-subwavelength-interference-based-on-light-pulse-storage-via-electromagnetically-induced-transparency
#1
Zhixiang Li, Jianji Liu, Hongming Fan, Jiachen Liu, Guoquan Zhang
We achieved high visibility first-order subwavelength interference based on light pulse storage and retrieval technique via electromagnetically induced transparency (EIT) effect in a Pr(3+):Y2SiO5 crystal. The interference field distribution of a double-slit was first stored in a Pr(3+):Y2SiO5 crystal based on EIT effect, and then it was read out by a spatially modulated readout beam. The retrieved output field is proportional to the product of the input interference field of the double-slit and the spatially modulated readout field...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28537455/efficacy-of-dipeptide-coated-magnetic-nanoparticles-in-lung-cancer-models-under-pulsed-electromagnetic-field
#2
Ganga Baskar, Mathangi Ravi, Jiban Jyoti Panda, Anjali Khatri, Bhawna Dev, Roy Santosham, Sekar Sathiya, Chidambaram Saravana Babu, Virander Singh Chauhan, Suresh K Rayala, Ganesh Venkatraman
Lung cancer is the leading cause of cancer deaths and the overall 5-year survival rate is less than 17%. Hyperthermia is an alternative approach for the treatment of lung cancer and is associated with fewer side effects. We employed ironoxide nanoparticles in inducing localized hyperthermia in lung cancer cells using a pulsed electromagnetic field (PEMF). We synthesized, characterized and determined the uptake of dipeptide-coated iron oxide nanoparticles. Further, their ability in inducing localized hyperthermia in PEMF on lung cancer cells was assessed...
May 24, 2017: Cancer Investigation
https://www.readbyqxmd.com/read/28534925/osmotin-loaded-magnetic-nanoparticles-with-electromagnetic-guidance-for-the-treatment-of-alzheimer-s-disease
#3
Faiz Ul Amin, Ali Kafash Hoshiar, Ton Duc Do, Yeongil Noh, Shahid Ali Shah, Muhammad Sohail Khan, Jungwon Yoon, Myeong Ok Kim
Alzheimer's disease (AD) is the most prevalent age-related neurodegenerative disease, pathologically characterized by the accumulation of aggregated amyloid beta (Aβ) in the brain. Here, we describe for the first time the development of a new, pioneering nanotechnology-based drug delivery approach for potential therapies for neurodegenerative diseases, particularly AD. We demonstrated the delivery of fluorescent carboxyl magnetic Nile Red particles (FMNPs) to the brains of normal mice using a functionalized magnetic field (FMF) composed of positive- and negative-pulsed magnetic fields generated by electromagnetic coils...
May 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28522446/non-contact-electromagnetic-induction-heating-for-eradicating-bacteria-and-yeasts-on-biomaterials-and-possible-relevance-to-orthopaedic-implant-infections-in-vitro-findings
#4
B G Pijls, I M J G Sanders, E J Kuijper, R G H H Nelissen
OBJECTIVES: Infection of implants is a major problem in elective and trauma surgery. Heating is an effective way to reduce the bacterial load in food preparation, and studies on hyperthermia treatment for cancer have shown that it is possible to heat metal objects with pulsed electromagnetic fields selectively (PEMF), also known as induction heating. We therefore set out to answer the following research question: is non-contact induction heating of metallic implants effective in reducing bacterial load in vitro? METHODS: Titanium alloy cylinders (Ti6Al4V) were exposed to PEMF from an induction heater with maximum 2000 watts at 27 kHz after being contaminated with five different types of micro-organisms: Staphylococcus epidermidis; Staphylococcus aureus; Pseudomonas aeruginosa; spore-forming Bacillus cereus; and yeast Candida albicans...
May 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28512472/pulsed-electromagnetic-field-regulates-microrna-21-expression-to-activate-tgf-%C3%AE-signaling-in-human-bone-marrow-stromal-cells-to-enhance-osteoblast-differentiation
#5
Nagarajan Selvamurugan, Zhiming He, Daniel Rifkin, Branka Dabovic, Nicola C Partridge
Pulsed electromagnetic fields (PEMFs) have been documented to promote bone fracture healing in nonunions and increase lumbar spinal fusion rates. However, the molecular mechanisms by which PEMF stimulates differentiation of human bone marrow stromal cells (hBMSCs) into osteoblasts are not well understood. In this study the PEMF effects on hBMSCs were studied by microarray analysis. PEMF stimulation of hBMSCs' cell numbers mainly affected genes of cell cycle regulation, cell structure, and growth receptors or kinase pathways...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28510268/effect-of-intervention-initiation-timing-of-pulsed-electromagnetic-field-on-ovariectomy-induced-osteoporosis-in-rats
#6
Jun Zhou, Yuan Liao, Yahua Zeng, Haitao Xie, Chengxiao Fu, Neng Li
The aim of this study is to explore the effect of timing of initiation of pulsed electromagnetic field (PEMF) therapy on bone mass, microarchitecture, and biomechanical properties, and to investigate receptor activator of NF-kB (RANK) expression in ovariectomized (OVX) rats. Sixty female Sprague-Dawley rats were randomly divided into two equal batches of three groups each (10 rats in each group). The first batch comprised of sham-operated (Sham-0 group), ovariectomized (OVX-0 group), and ovariectomized plus treated with PEMF starting from the day of OVX (Early PEMF group)...
May 16, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/28507996/effects-of-pulsed-electromagnetic-field-with-predatory-stress-on-functional-and-histological-index-of-injured-sciatic-nerve-in-rat
#7
Maryam Tasbih-Forosh, Leila Zarei, Ehsan Saboory, Mehran Bahrami-Bukani
OBJECTIVE: To assess the effect of combination of pulsed electromagnetic fields (PEMF) with predatory stress on transected sciatic nerve regeneration in rats. METHODS: In sham- operated group (SOG) the nerve was manipulated and left intact. The 10-mm rat sciatic nerve gap was created in rats. In transected group (Transected) nerve stumps were sutured to adjacent muscle and in vein graft group (VG) the gap was bridged using an inside-out vein graft. In VG/PEMF group the transected nerve was bridged using vein graft, phosphate buffered saline was administered into the graft and the whole body was exposed to PEMF...
April 2017: Bulletin of Emergency and Trauma
https://www.readbyqxmd.com/read/28504324/electromagnetic-fields-pulsed-radiofrequency-radiation-and-epigenetics-how-wireless-technologies-may-affect-childhood-development
#8
Cindy Sage, Ernesto Burgio
Mobile phones and other wireless devices that produce electromagnetic fields (EMF) and pulsed radiofrequency radiation (RFR) are widely documented to cause potentially harmful health impacts that can be detrimental to young people. New epigenetic studies are profiled in this review to account for some neurodevelopmental and neurobehavioral changes due to exposure to wireless technologies. Symptoms of retarded memory, learning, cognition, attention, and behavioral problems have been reported in numerous studies and are similarly manifested in autism and attention deficit hyperactivity disorders, as a result of EMF and RFR exposures where both epigenetic drivers and genetic (DNA) damage are likely contributors...
May 15, 2017: Child Development
https://www.readbyqxmd.com/read/28482141/notch-pathway-is-active-during-osteogenic-differentiation-of-human-bone-marrow-mesenchymal-stem-cells-induced-by-pulsed-electromagnetic-fields
#9
Leila Bagheri, Agnese Pellati, Paola Rizzo, Giorgio Aquila, Leo Massari, Monica De Mattei, Alessia Ongaro
Pulsed electromagnetic fields (PEMFs) have been used to treat bone diseases, particularly non-union healing. Although it is known that PEMFs promote the osteogenic differentiation of human mesenchymal stem cells (hMSCs), to date PEMF molecular mechanisms remain not clearly elucidated. The Notch signaling is a highly conserved pathway which regulates cell fate decisions and skeletal development. The aim of this study was to investigate if the known PEMF-induced osteogenic effects may involve the modulation of the Notch pathway...
May 8, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28462057/membrane-permeabilization-of-mammalian-cells-using-bursts-of-high-magnetic-field-pulses
#10
Vitalij Novickij, Janja Dermol, Audrius Grainys, Matej Kranjc, Damijan Miklavčič
BACKGROUND: Cell membrane permeabilization by pulsed electromagnetic fields (PEMF) is a novel contactless method which results in effects similar to conventional electroporation. The non-invasiveness of the methodology, independence from the biological object homogeneity and electrical conductance introduce high flexibility and potential applicability of the PEMF in biomedicine, food processing, and biotechnology. The inferior effectiveness of the PEMF permeabilization compared to standard electroporation and the lack of clear description of the induced transmembrane transport are currently of major concern...
2017: PeerJ
https://www.readbyqxmd.com/read/28452504/depletion-of-intense-fields
#11
D Seipt, T Heinzl, M Marklund, S S Bulanov
The interaction of charged particles and photons with intense electromagnetic fields gives rise to multiphoton Compton and Breit-Wheeler processes. These are usually described in the framework of the external field approximation, where the electromagnetic field is assumed to have infinite energy. However, the multiphoton nature of these processes implies the absorption of a significant number of photons, which scales as the external field amplitude cubed. As a result, the interaction of a highly charged electron bunch with an intense laser pulse can lead to significant depletion of the laser pulse energy, thus rendering the external field approximation invalid...
April 14, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28447616/high-order-harmonics-measured-by-the-photon-statistics-of-the-infrared-driving-field-exiting-the-atomic-medium
#12
N Tsatrafyllis, I K Kominis, I A Gonoskov, P Tzallas
High-order harmonics in the extreme-ultraviolet spectral range, resulting from the strong-field laser-atom interaction, have been used in a broad range of fascinating applications in all states of matter. In the majority of these studies the harmonic generation process is described using semi-classical theories which treat the electromagnetic field of the driving laser pulse classically without taking into account its quantum nature. In addition, for the measurement of the generated harmonics, all the experiments require diagnostics in the extreme-ultraviolet spectral region...
April 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28428549/low-noise-time-resolved-optical-sensing-of-electromagnetic-pulses-from-petawatt-laser-matter-interactions
#13
T S Robinson, F Consoli, S Giltrap, S J Eardley, G S Hicks, E J Ditter, O Ettlinger, N H Stuart, M Notley, R De Angelis, Z Najmudin, R A Smith
We report on the development and deployment of an optical diagnostic for single-shot measurement of the electric-field components of electromagnetic pulses from high-intensity laser-matter interactions in a high-noise environment. The electro-optic Pockels effect in KDP crystals was used to measure transient electric fields using a geometry easily modifiable for magnetic field detection via Faraday rotation. Using dielectric sensors and an optical fibre-based readout ensures minimal field perturbations compared to conductive probes and greatly limits unwanted electrical pickup between probe and recording system...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28419435/osteogenic-differentiation-potential-of-mesenchymal-stem-cells-cultured-on-nanofibrous-scaffold-improved-in-the-presence-of-pulsed-electromagnetic-field
#14
Monireh Arjmand, Abdolreza Ardeshirylajimi, Hossein Maghsoudi, Esmaeel Azadian
Nowadays, tissue engineering by using stem cells in combination with scaffolds and bioactive molecules has made significant contributions to the regeneration of damaged bone tissues. Since the usage of bioactive molecules including, growth factors to induce differentiation is safety limited in clinical applications, and it has also been previously observed that extremely low frequency pulsed electromagnetic fields (PEMF) can be effective in the enhancement of proliferation rate and osteogenic differentiation of stem cells, the aim of this study was investigating the osteoinductive potential of PEMF in combination with Poly(caprolactone) (PCL) nanofibrous scaffold...
April 17, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28414375/evaluation-of-femtosecond-laser-damage-to-gold-pulse-compression-gratings-fabricated-by-magnetron-sputtering-and-e-beam-evaporation
#15
Leilei Wang, Fanyu Kong, Zhilin Xia, Yunxia Jin, Haopeng Huang, Linxin Li, Junming Chen, Yun Cui, Jianda Shao
In this study, two kinds of Au-coated gratings (ACGs) with a period of 1740 lines/mm were fabricated and evaluated. For these ACG samples, magnetron sputtering and e-beam evaporation were used as the gold deposition process, and the samples had a bandwidth of at least 170 nm, with the -1st-order diffraction efficiency exceeding 90% around the center wavelength of 800 nm. The one-on-one damage threshold of ACGs fabricated by magnetron sputtering and e-beam evaporation measured at a pulse width of 60 fs was 0...
April 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/28401362/carpal-scaphoid-non-union-treatment-a-retrospective-trial-comparing-simple-retrograde-percutaneous-screw-fixation-versus-percutaneous-screw-fixation-plus-pulsed-electromagnetic-fields-physiostim-%C3%A2
#16
Alexis Pereira, Juan José Hidalgo Díaz, Maurise Saur, Santiago Salazar Botero, Sybille Facca, Philippe Liverneaux
BACKGROUND: The purpose of this retrospective comparative study was to assess whether a complementary treatment by pulsed electromagnetic field could increase the bone-healing rate of scaphoid non-union without SNAC (scaphoid non-union advanced collapse) treated by retrograde percutaneous screw fixation. CASE DESCRIPTION: Eighteen patients with scaphoid non-union were included in this retrospective study. The group 1 was made of nine cases (seven stage IIA and two stage IIB) of scaphoid non-union treated by retrograde percutaneous screw fixation and pulsed electromagnetic fields (Physiostim(®))...
April 11, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28381008/probe-beam-deflection-optical-imaging-of-thermal-and-mechanical-phenomena-resulting-from-nanosecond-electric-pulse-nsep-exposure-in-vitro
#17
Ronald A Barnes, Caleb C Roth, Hope T Beier, Gary Noojin, Christopher Valdez, Joel Bixler, Erick Moen, Mehdi Shadaram, Bennett L Ibey
Electric-field induced physical phenomena, such as thermal, mechanical and electrochemical dynamics, may be the driving mechanism behind bioeffects observed in mammalian cells during exposure to nanosecond-duration electric pulses (nsEP) in-vitro. Correlating a driving mechanism to a biological response requires the experimental measurement and quantification of all physical dynamics resulting from the nsEP stimulus. A passive and electromagnetic interference (EMI) immune sensor is required to resolve these dynamics in high strength electric fields...
March 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28373880/effects-of-multipolar-radiofrequency-and-pulsed-electromagnetic-field-treatment-for-face-and-neck-rejuvenation
#18
Thais Cristina Ferraz de Oliveira, Sheyla de Fatima Soares Rocha, Daniel Gontijo Ramos, Camila Gontijo Ramos, Michelle Vanessa Dos Anjos Carvalho, Mariana Gontijo Ramos
Skin aging is a gradual process that leads to wrinkle formation, laxity, and overall changes in skin appearance. In recent years, the demands to noninvasive treatments for facial rejuvenation increased, along with a variety of technologies and devices, such as radiofrequency. The present study aimed to evaluate the clinical effects of a multipolar radiofrequency and pulsed electromagnetic field treatment for face and neck rejuvenation. Eleven patients with mild to moderate grades of photoaging underwent eight radiofrequency and pulsed electromagnetic field treatment sessions, once a week...
2017: Dermatology Research and Practice
https://www.readbyqxmd.com/read/28360885/circadian-rhythm-influences-the-promoting-role-of-pulsed-electromagnetic-fields-on-sciatic-nerve-regeneration-in-rats
#19
Shu Zhu, Jun Ge, Zhongyang Liu, Liang Liu, Da Jing, Mingzi Ran, Meng Wang, Liangliang Huang, Yafeng Yang, Jinghui Huang, Zhuojing Luo
Circadian rhythm (CR) plays a critical role in the treatment of several diseases. However, the role of CR in the treatment of peripheral nerve defects has not been studied. It is also known that the pulsed electromagnetic fields (PEMF) can provide a beneficial microenvironment to quicken the process of nerve regeneration and to enhance the quality of reconstruction. In this study, we evaluate the impact of CR on the promoting effect of PEMF on peripheral nerve regeneration in rats. We used the self-made "collagen-chitosan" nerve conduits to bridge the 15-mm nerve gaps in Sprague-Dawley rats...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28337895/use-of-supercharged-cover-screw-as-static-magnetic-field-generator-for-bone-healing-1st-part-in-vitro-enhancement-of-osteoblast-like-cell-differentiation
#20
F Bambini, A Santarelli, A Putignano, M Procaccini, G Orsini, L Memè, D Sartini, M Emanuelli, L Lo Muzio
Since 1979, Pulsed electromagnetic fields (PEMFs) have been approved by the Food and Drug Administration as an effective method in the treatment of non-unions. As well as PEMFs, also static magnetic fields (SMFs) have been widely investigated in orthopaedic studies. Even if the exact mechanism of action is not well understood, a large number of studies showed specific effects both at cellular and tissue levels. As bone fracture healing and osseointegration share the same biological events, the application of magnetic field stimulation in order to facilitate the osseointegration process has been suggested...
January 2017: Journal of Biological Regulators and Homeostatic Agents
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