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Electromagnetic pollution

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https://www.readbyqxmd.com/read/29785039/extremely-low-frequency-electromagnetic-fields-impair-the-cognitive-and-motor-abilities-of-honey-bees
#1
S Shepherd, M A P Lima, E E Oliveira, S M Sharkh, C W Jackson, P L Newland
Extremely low frequency electromagnetic field (ELF EMF) pollution from overhead powerlines is known to cause biological effects across many phyla, but these effects are poorly understood. Honey bees are important pollinators across the globe and due to their foraging flights are exposed to relatively high levels of ELF EMF in proximity to powerlines. Here we ask how acute exposure to 50 Hz ELF EMFs at levels ranging from 20-100 µT, found at ground level below powerline conductors, to 1000-7000 µT, found within 1 m of the conductors, affects honey bee olfactory learning, flight, foraging activity and feeding...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29778684/modeled-and-perceived-rf-emf-noise-and-air-pollution-and-symptoms-in-a-population-cohort-is-perception-key-in-predicting-symptoms
#2
Astrid L Martens, Marije Reedijk, Tjabe Smid, Anke Huss, Danielle Timmermans, Maciej Strak, Wim Swart, Virissa Lenters, Hans Kromhout, Robert Verheij, Pauline Slottje, Roel C H Vermeulen
BACKGROUND: Psychosocial research has shown that perceived exposure can influence symptom reporting, regardless of actual exposure. The impact of this phenomenon on the interpretation of results from epidemiological research on environmental determinants of symptoms is unclear. OBJECTIVE: Our aim was to compare associations between modeled exposures, the perceived level of these exposures and reported symptoms (non-specific symptoms, sleep disturbances, and respiratory symptoms) for three different environmental exposures (radiofrequency electromagnetic fields (RF-EMF), noise, and air pollution)...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29751650/decorating-mof-derived-nanoporous-co-c-in-chain-like-polypyrrole-ppy-aerogel-a-lightweight-material-with-excellent-electromagnetic-absorption
#3
Xiaodong Sun, Xuliang Lv, Mingxu Sui, Xiaodi Weng, Xiaopeng Li, Jijun Wang
To clear away the harmful effects of the increment of electromagnetic pollution, high performance absorbers with appropriate impedance matching and strong attenuation capacity are strongly desired. In this study, a chain-like PPy aerogel decorated with MOF-derived nanoporous Co/C (Co/C@PPy) has been successfully prepared by a self-assembled polymerization method. With a filler loading ratio of 10 wt %, the composite of Co/C@PPy could achieve a promising electromagnetic absorption performance both in intensity and bandwidth...
May 11, 2018: Materials
https://www.readbyqxmd.com/read/29709183/binary-strengthening-and-toughening-of-mxene-cellulose-nanofibers-composite-paper-with-nacre-inspired-structure-and-superior-electromagnetic-interference-shielding-properties
#4
Wen-Tao Cao, Fei-Fei Chen, Ying-Jie Zhu, Yong-Gang Zhang, Ying-Ying Jiang, Ming-Guo Ma, Feng Chen
With the growing popularity of electrical communication equipment, high-performance electromagnetic interference (EMI) shielding materials are widely used to deal with radiation pollution. However, the large thickness and poor mechanical properties of many EMI shielding materials usually limit their applications. In this study, ultrathin and highly flexible Ti3C2Tx (d-Ti3C2Tx, MXene)/cellulose nanofibers (CNFs) composite paper with a nacre-like lamellar structure is fabricated via a vacuum filtration induced self-assembly process...
April 30, 2018: ACS Nano
https://www.readbyqxmd.com/read/29690589/galvanic-cell-reaction-driven-deposition-of-large-area-au-nanourchin-arrays-for-surface-enhanced-raman-scattering
#5
Zhongbo Li, Kexi Sun, Zhaofang Du, Bensong Chen, Xuan He
Here we report a low-cost synthetic approach for the direct fabrication of large-area Au nanourchin arrays on indium tin oxide (ITO) via a facile galvanic-cell-reaction-driven deposition in an aqueous solution of chloroauric acid and poly(vinyl pyrrolidone) (PVP). The homogeneous Au nanourchins are composed of abundant sharp nanotips, which can served as nanoantennas and increase the local electromagnetic field enhancement dramatically. Finite element theoretical calculations confirm the strong electromagnetic field can be created around the sharp nanotips and located in the nanogaps between adjacent tips of the Au nanourchins...
April 23, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29665217/ultrahigh-conductive-copper-large-flake-size-graphene-heterostructure-thin-film-with-remarkable-electromagnetic-interference-shielding-effectiveness
#6
Zhe Wang, Boyang Mao, Qianlong Wang, Jun Yu, Jixiang Dai, Rongguo Song, Zonghua Pu, Daping He, Zhi Wu, Shichun Mu
To guarantee the normal operation of next generation portable electronics and wearable devices, together with avoiding electromagnetic wave pollution, it is urgent to find a material possessing flexibility, ultrahigh conductive, and superb electromagnetic interference shielding effectiveness (EMI SE) simultaneously. In this work, inspired by a building bricks toy with the interlock system, we design and fabricate a copper/large flake size graphene (Cu/LG) composite thin film (≈8.8 μm) in the light of high temperature annealing of a large flake size graphene oxide film followed by magnetron sputtering of copper...
April 17, 2018: Small
https://www.readbyqxmd.com/read/29655646/5-g-wireless-telecommunications-expansion-public-health-and-environmental-implications
#7
Cindy L Russell
The popularity, widespread use and increasing dependency on wireless technologies has spawned a telecommunications industrial revolution with increasing public exposure to broader and higher frequencies of the electromagnetic spectrum to transmit data through a variety of devices and infrastructure. On the horizon, a new generation of even shorter high frequency 5G wavelengths is being proposed to power the Internet of Things (IoT). The IoT promises us convenient and easy lifestyles with a massive 5G interconnected telecommunications network, however, the expansion of broadband with shorter wavelength radiofrequency radiation highlights the concern that health and safety issues remain unknown...
April 11, 2018: Environmental Research
https://www.readbyqxmd.com/read/29605834/electromagnetic-radiation-and-behavioural-response-of-ticks-an-experimental-test
#8
Blažena Vargová, Igor Majláth, Juraj Kurimský, Roman Cimbala, Michal Kosterec, Piotr Tryjanowski, Łukasz Jankowiak, Tomáš Raši, Viktória Majláthová
Factors associated with the increased usage of electronic devices, wireless technologies and mobile phones nowadays are present in increasing amounts in our environment. All living organisms are constantly affected by electromagnetic radiation which causes serious environmental pollution. The distribution and density of ticks in natural habitats is influenced by a complex of abiotic and biotic factors. Exposure to radio-frequency electromagnetic field (RF-EMF) constitutes a potential cause altering the presence and distribution of ticks in the environment...
March 31, 2018: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29584465/electromagnetic-field-pretreatment-of-sinapis-alba-seeds-improved-cadmium-phytoextraction
#9
Piotr Bulak, Lesia Lata, Andrzej Plak, Dariusz Wiącek, Wacław Strobel, Anna Walkiewicz, Stanisław Pietruszewski, Andrzej Bieganowski
It was hypothesized that electromagnetic field (EMF) pretreatment of white mustard (Sinapis alba L.) seeds could increase the accumulation of non-essential, pollutant heavy metals such as cadmium (Cd) in shoots. Seeds of white mustard were treated with either 60 or 120 mT of alternating EMF (50 Hz) for 1 minute and then grown in a Petri dish in the presence of Cd, in comparison to the control (seeds grown without EMF pretreatment). Biomass production and content of calcium (Ca) and Cd in seedling shoots were measured...
March 21, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29477917/measurement-of-the-100-mhz-emf-radiation-in-vivo-effects-on-zebrafish-d-rerio-embryonic-development-a-multidisciplinary-study
#10
Chiara Carla Piccinetti, Alfredo De Leo, Gloria Cosoli, Lorenzo Scalise, Basilio Randazzo, Graziano Cerri, Ike Olivotto
The augmented exposure of both environment and human being to electromagnetic waves and the concomitant lack of an unequivocal knowledge about biological consequences of these radiations, raised public interest on electromagnetic pollution. In this context, the present study aims to evaluate the biological effects on zebrafish (ZF) embryos of 100 MHz radiofrequency electromagnetic field (RF-EMF) exposure through a multidisciplinary protocol. Because of the shared synteny between human and ZF genomes that validated its use in biomedical research, toxicology and developmental biology studies, ZF was here selected as experimental model and a measurement protocol and biological analyses have been set up to clearly discriminate between RF-EMF biological and thermal effects...
June 15, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29431129/cohort-profile-lifework-a-prospective-cohort-study-on-occupational-and-environmental-risk-factors-and-health-in-the-netherlands
#11
Marije Reedijk, Virissa Lenters, Pauline Slottje, Anouk Pijpe, Petra H Peeters, Joke C Korevaar, Bas Bueno-de-Mesquita, W M Monique Verschuren, Robert A Verheij, Inka Pieterson, Flora E van Leeuwen, Matti A Rookus, Hans Kromhout, Roel C H Vermeulen
PURPOSE: LIFEWORK is a large federated prospective cohort established in the Netherlands to quantify the health effects of occupational and environmental exposures. This cohort is also the Dutch contribution to the international Cohort Study of Mobile Phone Use and Health (COSMOS). In this paper, we describe the study design, ongoing data collection, baseline characteristics of participants and the repeatability of key questionnaire items. PARTICIPANTS: 88 466 participants were enrolled in three cohort studies in 2011-2012...
February 3, 2018: BMJ Open
https://www.readbyqxmd.com/read/29410865/preparation-of-hollow-iron-halloysite-nanocomposites-with-enhanced-electromagnetic-performances
#12
Xue-Gang Chen, Ru-Chang Li, Ao-Bo Zhang, Shuang-Shuang Lyu, Shu-Ting Liu, Kang-Kang Yan, Wei Duan, Ying Ye
Nanostructures loaded on halloysite nanotubes (HNTs) have attracted global interest, because the nanotubular HNTs could extend the range of their potential applications. In this study, we fabricated a novel nanocomposite with hollow iron nanoparticles loaded on the surface of HNTs. The structure of the iron nanoparticles can be adjusted by ageing time. Owing to the increased remnant magnetization and coercivity values, the nanocomposites loaded with hollow iron nanoparticles showed better electromagnetic performance than that with solid iron nanoparticles...
January 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29380939/electromagnetic-shielding-materials-in-ghz-range
#13
REVIEW
Marta González, Javier Pozuelo, Juan Baselga
The state-of-the art in the design and the manufacture methods of the different electromagnetic shielding materials has been reviewed. This topic has become a mainstream field of research because of the electromagnetic pollution generated by telecommunication technology development. The review is centred in absorbent materials and shows a general overview of how the absorption properties of such composites can be tailored through changes in geometry, composition, morphology, and the filler particles content...
January 30, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29336351/microwave-absorption-properties-of-reduced-graphene-oxide-strontium-hexaferrite-poly-methyl-methacrylate-composites
#14
Sanghamitra Acharya, J Ray, T U Patro, Prashant Alegaonkar, Suwarna Datar
The key factors to consider when designing microwave absorber materials for eradication of electromagnetic (EM) pollution are absorption of incident EM waves and good impedance matching. By keeping these things in mind, flexible microwave absorber composite films can be fabricated by simple gel casting techniques using reduced graphene oxide (RGO) and strontium ferrite (SF) in a poly(methyl methacrylate) (PMMA) matrix. SF nanoparticles are synthesized by the well known sol-gel method. Subsequently, reduced graphene oxide (RGO) and SF nanocomposite (RGOSF) are prepared through a chemical reduction method using hydrazine...
March 16, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29125556/integration-of-gis-electromagnetic-and-electrical-methods-in-the-delimitation-of-groundwater-polluted-by-effluent-discharge-salamanca-spain-a-case-study
#15
Rubén Vidal Montes, Antonio Miguel Martínez-Graña, José Ramón Martínez Catalán, Puy Ayarza Arribas, Francisco Javier Sánchez San Román, Caridad Zazo
The present work envisages the possible geometry of a contaminated plume of groundwater near hospital facilities by combining GIS (Geographic Information System) and geophysical methods. The rock underlying the soil and thin sedimentary cover of the study area is moderately fractured quartzite, which makes aquifers vulnerable to pollution. The GIS methodology is used to calculate the area that would be affected by the effluent source of residual water, based on algorithms that consider ground surface mapping (slopes, orientations, accumulated costs and cost per distance)...
November 10, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28964208/a-miniature-hopkinson-experiment-device-based-on-multistage-reluctance-coil-electromagnetic-launch
#16
Wenkai Huang, Shi Huan, Ying Xiao
A set of seven-stage reluctance miniaturized Hopkinson bar electromagnetic launcher has been developed in this paper. With the characteristics of high precision, small size, and little noise pollution, the device complies with the requirements of miniaturized Hopkinson bar for high strain rate. The launcher is a seven-stage accelerating device up to 65.5 m/s. A high performance microcontroller is used to control accurately the discharge of capacitor sets, by means of which the outlet velocity of the projectile can be controlled within a certain velocity range...
September 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28863705/real-time-microwave-sensor-system-for-detection-of-polluting-substances-in-pure-water
#17
A L Neves, E Georget, N Cochinaire, P Sabouroux
In the present work, a real-time coaxial sensor for detecting foreign substances in aqueous solutions was developed and tested. This tool, based on a coaxial propagation line for determining the electromagnetic parameters of materials, was updated into a liquid permittivity monitoring sensor of continuous flow. A few solutions of different nature were tested, and while adding a liquid or electrolyte substance, named "pollutant," variations in the base solution were documented. Ethanol and water mixtures were used as reference, while the ability of the system to detect emulsions (such as oil in water solutions) was also evaluated...
August 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28799671/hydrophobic-flexible-and-lightweight-mxene-foams-for-high-performance-electromagnetic-interference-shielding
#18
Ji Liu, Hao-Bin Zhang, Renhui Sun, Yafeng Liu, Zhangshuo Liu, Aiguo Zhou, Zhong-Zhen Yu
Ultrathin, lightweight, and flexible electromagnetic-interference (EMI) shielding materials are urgently required to manage increasingly serious radiation pollution. 2D transition-metal carbides (MXenes) are considered promising alternatives to graphene for providing excellent EMI-shielding performance due to their outstanding metallic electrical conductivity. However, the hydrophilicity of MXene films may affect their stability and reliability when applied in moist or wet environments. Herein, for the first time, an efficient and facile approach is reported to fabricate freestanding, flexible, and hydrophobic MXene foam with reasonable strength by assembling MXene sheets into films followed by a hydrazine-induced foaming process...
August 11, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28758796/on-the-origin-of-worries-about-modern-health-hazards-experimental-evidence-for-a-conjoint-influence-of-media-reports-and-personality-traits
#19
Michael Witthöft, Ina Freitag, Christiane Nußbaum, Anne-Kathrin Bräscher, Fabian Jasper, Josef Bailer, G James Rubin
OBJECTIVE: Worries about health threatening effects of potential health hazards of modern life (e.g. electric devices and pollution) represent a growing phenomenon in Western countries. Yet, little is known about the causes of this growing special case of affective risk perceptions termed Modern Health Worries (MHW). The purpose of this study is to examine a possible role of biased media reports in the formation of MHW. DESIGN: In two experiments, we investigated whether typical television reports affect MHW...
March 2018: Psychology & Health
https://www.readbyqxmd.com/read/28675226/effects-of-annealing-atmosphere-and-rgo-concentration-on-the-optical-properties-and-enhanced-photocatalytic-performance-of-snse-rgo-nanocomposites
#20
A Ghorban Shiravizadeh, Ramin Yousefi, S M Elahi, S A Sebt
The photocatalytic properties of SnSe nanostructures (NSs) and SnSe/graphene nanocomposites with different graphene concentrations (5, 10, and 15 wt%/v) were investigated. The products were synthesized by a simple and cost-effective co-precipitation method. The samples obtained demonstrated that graphene concentration at an optimum amount was an important factor in enhancing the photocatalytic performance of the products. The graphene source was graphene oxide (GO) sheets and several characterization results indicated, which were used to remove Methylene blue (MB) dye, that the GO sheets were changed into reduced graphene oxide (rGO) sheets during the synthesis process...
July 21, 2017: Physical Chemistry Chemical Physics: PCCP
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