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    2395 results match your criteria Bioelectromagnetics[Journal]

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    Heart rate variability affected by radiofrequency electromagnetic field in adolescent students.
    Bioelectromagnetics 2018 Feb 22. Epub 2018 Feb 22.
    Jessenius Faculty of Medicine in Martin, Department of Medical Biophysics, Comenius University in Bratislava, Martin, Slovakia.
    This study examines the possible effect of radiofrequency (RF) electromagnetic fields (EMF) on the autonomic nervous system (ANS). The effect of RF EMF on ANS activity was studied by measuring heart rate variability (HRV) during ortho-clinostatic test (i.e. Read More

    ATP sensitive Kchannel subunits (Kir6.1, Kir6.2) are the candidate mediators regulating ameliorating effects of pulsed magnetic field on aortic contractility in diabetic rats.
    Bioelectromagnetics 2018 Feb 15. Epub 2018 Feb 15.
    Faculty of Medicine, Department of Medical Biology, Cukurova University, Adana, Turkey.
    Diabetes mellitus is a metabolic disease that causes increased morbidity and mortality in developed and developing countries. With recent advancements in technology, alternative treatment methods have begun to be investigated in the world. This study aims to evaluate the effect of pulsed magnetic field (PMF) on vascular complications and contractile activities of aortic rings along with Kir6. Read More

    Tissue models for RF exposure evaluation at frequencies above 6 GHz.
    Bioelectromagnetics 2018 Feb 8. Epub 2018 Feb 8.
    Department of Electrical Engineering, University of Maryland, College Park, Maryland.
    Exposures to radiofrequency (RF) energy above 6 GHz are characterized by shallow energy penetration, typically limited to the skin, but the subsequent increase in skin temperature is largely determined by heat transport in subcutaneous layers. A detailed analysis of the energy reflection, absorption, and power density distribution requires a knowledge of the properties of the skin layers and their variations. We consider an anatomically detailed model consisting of 3 or 4 layers (stratum corneum, viable epidermis plus dermis, subcutaneous fat, and muscle). Read More

    Magnetic field pattern synthesis and its application in targeted drug delivery: Design and implementation.
    Bioelectromagnetics 2018 Feb 2. Epub 2018 Feb 2.
    Bioelectromagnetics Group, Applied Electromagnetics Laboratory, School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran.
    In cancer therapy, magnetic drug targeting is considered as an effective treatment to reduce chemotherapy's side effects. The accurate design and shaping of magnetic fields are crucial for healthy cells to be immune from chemotherapeutics. In this paper, arbitrary 2-dimensional spatial patterns of magnetic fields from DC to megahertz are represented in terms of spatial Fourier spectra with sinusoidal eigenfunctions. Read More

    Occupational exposure to extremely low-frequency magnetic fields and the risk of ALS: A systematic review and meta-analysis.
    Bioelectromagnetics 2018 Feb 19;39(2):156-163. Epub 2018 Jan 19.
    Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands.
    We performed a meta-analysis to examine associations of occupational exposure to extremely-low frequency magnetic fields (ELF-MF) with amyotrophic lateral sclerosis (ALS). Epidemiologic studies were identified in EMBASE and MEDLINE, in reference lists and a specialist database. We included studies that reported risk estimates of ALS in association with occupational ELF-MF exposure. Read More

    Calibration and non-orthogonality correction of three-axis Hall sensors for the monitoring of MRI workers' exposure to static magnetic fields.
    Bioelectromagnetics 2018 Feb 19;39(2):108-119. Epub 2018 Jan 19.
    U947, Inserm, Nancy, France.
    A Magnetic Resonance Imaging (MRI) scanner uses three different electromagnetic fields (EMF) to produce body images: a static permanent magnetic field (MF), several pulsed magnetic gradients, and a radiofrequency pulse. As a result, any occupation that includes an MRI exposes workers to a strong MF. The World Health Organization has now given the monitoring of occupational EMF exposure a high priority. Read More

    Pulsed electromagnetic field improves subchondral bone microstructure in knee osteoarthritis rats through a Wnt/β-catenin signaling-associated mechanism.
    Bioelectromagnetics 2018 Feb 18;39(2):89-97. Epub 2017 Dec 18.
    Department of Rehabilitation Medicine, West China Hospital, Sichuan University, Chengdu, China.
    Pulsed electromagnetic field (PEMF) is often used for management of osteoarthritis (OA). The aim of the study was to determine whether PEMF can successfully improve subchondral bone microstructure through a Wnt/β-catenin signaling-associated pathway in rats with knee OA induced by low-dose monosodium iodoacetate (MIA). Seventy-two 12-week-old male Sprague-Dawley rats were randomly assigned to three groups: OA (n = 24), PEMF (n = 24), and Control (n = 24). Read More

    Uniform magnetic targeting of magnetic particles attracted by a new ferromagnetic biological patch.
    Bioelectromagnetics 2018 Feb 18;39(2):98-107. Epub 2017 Dec 18.
    Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China.
    A new non-toxic ferromagnetic biological patch (MBP) was designed in this paper. The MBP consisted of two external layers that were made of transparent silicone, and an internal layer that was made of a mixture of pure iron powder and silicon rubber. Finite-element analysis showed that the local inhomogeneous magnetic field (MF) around the MBP was generated when MBP was placed in a uniform MF. Read More

    Extremely high-frequency electromagnetic radiation enhances neutrophil response to particulate agonists.
    Bioelectromagnetics 2018 Feb 30;39(2):144-155. Epub 2017 Nov 30.
    Kotel'nikov Institute of Radioengineering and Electronics of Russian Academy of Sciences (Fryasino branch), Fryasino, Russia.
    The growing use of extremely high-frequency electromagnetic radiation (EHF EMR) in information and communication technology and in biomedical applications has raised concerns regarding the potential biological impact of millimeter waves (MMWs). Here, we elucidated the effects of MMW radiation on neutrophil activation induced by opsonized zymosan or E. coli in whole blood ex vivo. Read More

    Analysis of ear side of mobile phone use in the general population of Japan.
    Bioelectromagnetics 2018 Jan 24;39(1):53-59. Epub 2017 Nov 24.
    Department of Public Health, School of Medicine, Tokyo Women's Medical University, Tokyo, Japan.
    This study aimed to clarify the distribution of the ear side of mobile phone use in the general population of Japan and clarify what factors are associated with the ear side of mobile phone use. Children at elementary and junior high schools (n = 2,518) and adults aged ≥20 years (n = 1,529) completed an Internet-based survey. Data were subjected to a logistic regression analysis. Read More

    Effects of exposure to electromagnetic field from 915 MHz radiofrequency identification system on circulating blood cells in the healthy adult rat.
    Bioelectromagnetics 2018 Jan 24;39(1):68-76. Epub 2017 Nov 24.
    Department of Neurosurgery, Ajou University School of Medicine, Suwon, Republic of Korea.
    We investigated whether exposure to the 915 MHz radiofrequency identification (RFID) signal affected circulating blood cells in rats. Sprague-Dawley rats were exposed to RFID at a whole-body specific absorption rate of 2 W/kg for 8 h per day, 5 days per week, for 2 weeks. Complete blood counts were performed after RFID exposure, and the CD4/CD8ratio was determined by flow cytometry. Read More

    Retrospective estimation of the electric and magnetic field exposure conditions in in vitro experimental reports reveal considerable potential for uncertainty.
    Bioelectromagnetics 2017 Nov 24. Epub 2017 Nov 24.
    Immunent B.V. and Neiding B.V., Veldhoven, The Netherlands.
    Experiments on cell cultures exposed to extremely low frequency (ELF, 3-300 Hz) magnetic fields are often subject to multiple sources of uncertainty associated with specific electric and magnetic field exposure conditions. Here we systemically quantify these uncertainties based on exposure conditions described in a group of bioelectromagnetic experimental reports for a representative sampling of the existing literature. The resulting uncertainties, stemming from insufficient, ambiguous, or erroneous description, design, implementation, or validation of the experimental methods and systems, were often substantial enough to potentially make any successful reproduction of the original experimental conditions difficult or impossible. Read More

    Assessment of exposure to radio frequency electromagnetic fields from smart utility meters in GB; part II) numerical assessment of induced SAR within the human body.
    Bioelectromagnetics 2017 Nov 16. Epub 2017 Nov 16.
    Radiation Dosimetry Department, Public Health England, Oxford, United Kingdom.
    Human body exposure to radiofrequency electromagnetic waves emitted from smart meters was assessed using various exposure configurations. Specific energy absorption rate distributions were determined using three anatomically realistic human models. Each model was assigned with age- and frequency-dependent dielectric properties representing a collection of age groups. Read More

    IEI-EMF provocation case studies: A novel approach to testing sensitive individuals.
    Bioelectromagnetics 2018 Feb 10;39(2):132-143. Epub 2017 Nov 10.
    Australian Centre for Electromagnetic Bioeffects Research.
    The etiology of Idiopathic Environmental Intolerance attributed to Electromagnetic Fields (IEI-EMF) is controversial. While the majority of studies have indicated that there is no relationship between EMF exposure and symptoms reported by IEI-EMF sufferers, concerns about methodological issues have been raised. Addressing these concerns, the present experiment was designed as a series of individual case studies to determine whether there is a relationship between radiofrequency-electromagnetic field (RF-EMF) exposure and an IEI-EMF individual's self-reported symptoms. Read More

    Exposure to a specific time-varying electromagnetic field inhibits cell proliferation via cAMP and ERK signaling in cancer cells.
    Bioelectromagnetics 2017 Nov 10. Epub 2017 Nov 10.
    Department of Biomolecular Sciences, Laurentian University, Sudbury, Ontario, Canada.
    Exposure to specific electromagnetic field (EMF) patterns can affect a variety of biological systems. We have shown that exposure to Thomas-EMF, a low-intensity, frequency-modulated (25-6 Hz) EMF pattern, inhibited growth and altered cell signaling in malignant cells. Exposure to Thomas-EMF for 1 h/day inhibited the growth of malignant cells including B16-BL6 mouse melanoma cells, MDA-MB-231, MDA-MB-468, BT-20, and MCF-7 human breast cancer and HeLa cervical cancer cells but did not affect non-malignant cells. Read More

    Effects of EMF emissions from undersea electric cables on coral reef fish.
    Bioelectromagnetics 2018 Jan 9;39(1):35-52. Epub 2017 Nov 9.
    Nova Southeastern University, Halmos College of Natural Sciences and Oceanography, Dania Beach, Florida.
    The objective of this study was to determine if electromagnetic field (EMF) emissions from undersea power cables impacted local marine life, with an emphasis on coral reef fish. The work was done at the South Florida Ocean Measurement Facility of Naval Surface Warfare Center in Broward County, Florida, which has a range of active undersea detection and data transmission cables. EMF emissions from a selected cable were created during non-destructive visual fish surveys on SCUBA. Read More

    EMP-induced BBB-disruption enhances drug delivery to glioma and increases treatment efficacy in rats.
    Bioelectromagnetics 2018 Jan 6;39(1):60-67. Epub 2017 Nov 6.
    Department of Radiation Medicine, Faculty of Preventive Medicine, Fourth Military Medical University, Xi'an, China.
    Chemotherapy on gliomas is not satisfactorily efficient because the presence of blood-brain barriers (BBB) leads to inadequate exposure of tumor cells to administered drugs. In order to facilitate chemotherapeutics to penetrate BBB and increase the treatment efficacy of gliomas, electromagnetic pulse (EMP) was applied and the 1-(2-Chlorethyl)-cyclohexyl-nitrosourea (CCNU) lomustine concentration in tumor tissue, tumor size, tumor apoptosis, and side effects were measured in glioma-bearing rat model. The results showed that EMP exposure could enhance the delivery of CCNU to tumor tissue, facilitate tumor apoptosis, and inhibit tumor growth without obvious side effects. Read More

    Improvement of wheat seed vitality by dielectric barrier discharge plasma treatment.
    Bioelectromagnetics 2018 Feb 13;39(2):120-131. Epub 2017 Oct 13.
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, China.
    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. Read More

    Effects of extremely low frequency magnetic field on the development of tolerance to the analgesic effect of morphine in rats.
    Bioelectromagnetics 2017 Dec 11;38(8):618-625. Epub 2017 Oct 11.
    Research Center and Department of Physiology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran.
    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. Read More

    The epigenetic component of the brain response to electromagnetic stimulation in Parkinson's Disease patients: A literature overview.
    Bioelectromagnetics 2018 Jan 9;39(1):3-14. Epub 2017 Oct 9.
    ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Rome, Italy.
    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). Notwithstanding the proven efficacy of EM therapies, the precise molecular mechanisms underlying the brain response to these types of stimulations are still far from being elucidated. Read More

    Suppression of Arabidopsis flowering by near-null magnetic field is mediated by auxin.
    Bioelectromagnetics 2018 Jan 20;39(1):15-24. Epub 2017 Sep 20.
    Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, P.R. China.
    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. Read More

    Wearable slot antenna at 2.45 GHz for off-body radiation: Analysis of efficiency, frequency shift, and body absorption.
    Bioelectromagnetics 2018 Jan 12;39(1):25-34. Epub 2017 Sep 12.
    Department of Communications Engineering, University of the Basque Country (UPV/EHU), Bilbao, Spain.
    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. Read More

    Effects of static magnetic fields on the enteropathogenic Escherichia coli.
    Bioelectromagnetics 2017 Oct 25;38(7):570-578. Epub 2017 Aug 25.
    Departamento de Salud Pública, Facultad de Medicina UNAM, Ciudad de México, México.
    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. Read More

    Forced acoustic oscillations of biological cell.
    Bioelectromagnetics 2017 Dec 24;38(8):613-617. Epub 2017 Aug 24.
    Department of Physics, Volgograd State Technical University, Volgograd, Russia.
    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. Read More

    Millimeter-wave emissivity as a metric for the non-contact diagnosis of human skin conditions.
    Bioelectromagnetics 2017 Oct 24;38(7):559-569. Epub 2017 Aug 24.
    Royal Manchester Children's Hospital, Manchester, United Kingdom.
    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. Read More

    Pulsed electromagnetic fields promote the proliferation and differentiation of osteoblasts by reinforcing intracellular calcium transients.
    Bioelectromagnetics 2017 Oct 18;38(7):541-549. Epub 2017 Aug 18.
    The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China.
    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. Read More

    Thermal mapping on male genital and skin tissues of laptop thermal sources and electromagnetic interaction.
    Bioelectromagnetics 2017 Oct 11;38(7):550-558. Epub 2017 Aug 11.
    School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran.
    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.S. Read More

    Stable morphological-physiological and neural protein expression changes in rat bone marrow mesenchymal stem cells treated with electromagnetic field and nitric oxide.
    Bioelectromagnetics 2017 Dec 7;38(8):592-601. Epub 2017 Aug 7.
    Faculty of Biological Science, Department of Biophysics, Tarbiat Modares University, Tehran, Iran.
    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. Read More

    Magnetosensitivity of bacteria E. coli: Magnetic isotope and magnetic field effects.
    Bioelectromagnetics 2017 Dec 7;38(8):581-591. Epub 2017 Aug 7.
    Orenburg State University, Orenburg, Russia.
    The biological effects of aMg 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:Mg,Mg,Mg, and a natural mixture of Mg isotopes. Among these isotopes onlyMg 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. Read More

    Differential intensity-dependent effects of pulsed electromagnetic fields on RANKL-induced osteoclast formation, apoptosis, and bone resorbing ability in RAW264.7 cells.
    Bioelectromagnetics 2017 Dec 24;38(8):602-612. Epub 2017 Jul 24.
    Department of Biomedical Engineering, Fourth Military Medical University, Xi'an, China.
    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. Read More

    Variation in the dielectric properties of freshly excised colorectal cancerous tissues at different tumor stages.
    Bioelectromagnetics 2017 Oct 17;38(7):522-532. Epub 2017 Jul 17.
    South China University of Technology School of Medicine, Guangzhou, China.
    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. Read More

    Enzymatic mechanisms of biological magnetic sensitivity.
    Bioelectromagnetics 2017 Oct 17;38(7):511-521. Epub 2017 Jul 17.
    Osaka Ohtani University, Tondabayashi, Japan.
    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. Read More

    Hybrid model for the personal exposure meter response in an outdoor environment.
    Bioelectromagnetics 2017 Dec 14;38(8):626-647. Epub 2017 Jul 14.
    Broadcasting and Media Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon, Korea.
    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. Read More

    Influence of 340 mT static magnetic field on germination potential and mid-infrared spectrum of wheat.
    Bioelectromagnetics 2017 Oct 12;38(7):533-540. Epub 2017 Jul 12.
    Institute of Physics, University of Belgrade, Belgrade, Serbia.
    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. Read More

    Effects of pulsed electromagnetic fields on postmenopausal osteoporosis.
    Bioelectromagnetics 2017 Sep 30;38(6):406-424. Epub 2017 Jun 30.
    Rehabilitation Medicine Center, West China Hospital, Sichuan University, Chengdu, P. R. China.
    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. Read More

    Biological effects related to geomagnetic activity and possible mechanisms.
    Bioelectromagnetics 2017 Oct 21;38(7):497-510. Epub 2017 Jun 21.
    I.D. Papanin Institute for Biology of Inland Waters Russian Academy of Sciences, Borok, Russian Federation.
    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. Read More

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