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Electromagnetic pollution

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https://www.readbyqxmd.com/read/28799671/hydrophobic-flexible-and-lightweight-mxene-foams-for-high-performance-electromagnetic-interference-shielding
#1
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
#2
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...
July 31, 2017: 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
#3
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
https://www.readbyqxmd.com/read/28607928/extremely-low-frequency-electromagnetic-fields-affect-myogenic-processes-in-c2c12-myoblasts-role-of-gap-junction-mediated-intercellular-communication
#4
Caterina Morabito, Nathalie Steimberg, Francesca Rovetta, Jennifer Boniotti, Simone Guarnieri, Giovanna Mazzoleni, Maria A Mariggiò
Extremely low-frequency electromagnetic fields (ELF-EMFs) can interact with biological systems. Although they are successfully used as therapeutic agents in physiatrics and rehabilitative practice, they might represent environmental pollutants and pose a risk to human health. Due to the lack of evidence of their mechanism of action, the effects of ELF-EMFs on differentiation processes in skeletal muscle were investigated. C2C12 myoblasts were exposed to ELF-EMFs generated by a solenoid. The effects of ELF-EMFs on cell viability and on growth and differentiation rates were studied using colorimetric and vital dye assays, cytomorphology, and molecular analysis of MyoD and myogenin expression, respectively...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28470342/ten-gigahertz-microwave-radiation-impairs-spatial-memory-enzymes-activity-and-histopathology-of-developing-mice-brain
#5
Archana Sharma, Kavindra Kumar Kesari, Virender Kumar Saxena, Rashmi Sisodia
For decades, there has been an increasing concern about the potential hazards of non-ionizing electromagnetic fields that are present in the environment and alarming as a major pollutant or electro-pollutant for health risk and neuronal diseases. Therefore, the objective of the present study was to explore the effects of 10 GHz microwave radiation on developing mice brain. Two weeks old mice were selected and divided into two groups (i) sham-exposed and (ii) microwave-exposed groups. Animals were exposed for 2 h/day for 15 consecutive days...
May 3, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28409353/assessment-of-spatial-distribution-of-soil-heavy-metals-using-ann-ga-mslr-and-satellite-imagery
#6
Arman Naderi, Mohammad Amir Delavar, Babak Kaboudin, Mohammad Sadegh Askari
This study aims to assess and compare heavy metal distribution models developed using stepwise multiple linear regression (MSLR) and neural network-genetic algorithm model (ANN-GA) based on satellite imagery. The source identification of heavy metals was also explored using local Moran index. Soil samples (n = 300) were collected based on a grid and pH, organic matter, clay, iron oxide contents cadmium (Cd), lead (Pb) and zinc (Zn) concentrations were determined for each sample. Visible/near-infrared reflectance (VNIR) within the electromagnetic ranges of satellite imagery was applied to estimate heavy metal concentrations in the soil using MSLR and ANN-GA models...
May 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28361964/experimental-and-numerical-evaluations-on-palm-microwave-heating-for-red-palm-weevil-pest-control
#7
Rita Massa, Gaetano Panariello, Daniele Pinchera, Fulvio Schettino, Emilio Caprio, Raffaele Griffo, Marco Donald Migliore
The invasive Red Palm Weevil is the major pest of palms. Several control methods have been applied, however concern is raised regarding the treatments that can cause significant environmental pollution. In this context the use of microwaves is particularly attractive. Microwave heating applications are increasingly proposed in the management of a wide range of agricultural and wood pests, exploiting the thermal death induced in the insects that have a thermal tolerance lower than that of the host matrices. This paper describes research aiming to combat the Red Palm pest using microwave heating systems...
March 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28350156/one-pot-sintering-strategy-for-efficient-fabrication-of-high-performance-and-multifunctional-graphene-foams
#8
Yang Li, Hao-Bin Zhang, Lihua Zhang, Bin Shen, Wentao Zhai, Zhong-Zhen Yu, Wenge Zheng
Macroscopic three-dimensional (3D) graphene foams (GFs) were fabricated efficiently by immediately sintering low-temperature exfoliated graphene powder under inert atmosphere at the temperature over 500 °C. The one-pot sintering process not only integrated two-dimensional (2D) graphene sheets into 3D GF, but also accelerated the structural integrity of graphene by inducing its deoxygenation and repairing the defects. More importantly, the whole process could be finished within hours, usually less than 12 h, and the resultant GFs with interconnected graphene framework as well as meso- and macroporous structure exhibited exceptional attenuating performance for high-frequency electromagnetic interference and adsorption capacities for organic pollutants...
April 4, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28036170/absorption-dominated-electromagnetic-wave-suppressor-derived-from-ferrite-doped-cross-linked-graphene-framework-and-conducting-carbon
#9
Sourav Biswas, Injamamul Arief, Sujit Sankar Panja, Suryasarathi Bose
To minimize electromagnetic (EM) pollution, two key parameters, namely, intrinsic wave impedance matching and intense absorption of incoming EM radiation, must satisfy the utmost requirements. To target these requirements, soft conducting composites consisting of binary blends of polycarbonate (PC) and poly(vinylidene fluoride) (PVDF) were designed with doped multiwalled carbon nanotubes (MWCNTs) and a three-dimensional cross-linked graphene oxide (GO) framework doped with ferrite nanoparticles. The doping of α-MnO2 onto the MWCNTs ensured intrinsic wave impedance matching in addition to providing conducting pathways, and the ferrite-doped cross-linked GO facilitated the enhanced attenuation of the incoming EM radiation...
January 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28024336/fully-packaged-blue-energy-harvester-by-hybridizing-a-rolling-triboelectric-nanogenerator-and-an-electromagnetic-generator
#10
Xin Wang, Zhen Wen, Hengyu Guo, Changsheng Wu, Xu He, Long Lin, Xia Cao, Zhong Lin Wang
Ocean energy, in theory, is an enormous clean and renewable energy resource that can generate electric power much more than that required to power the entire globe without adding any pollution to the atmosphere. However, owing to a lack of effective technology, such blue energy is almost unexplored to meet the energy requirement of human society. In this work, a fully packaged hybrid nanogenerator consisting of a rolling triboelectric nanogenerator (R-TENG) and an electromagnetic generator (EMG) is developed to harvest water motion energy...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/27900623/efficient-removal-of-antibiotics-in-a-fluidized-bed-reactor-by-facile-fabricated-magnetic-powdered-activated-carbon
#11
Jianqing Ma, Qunfeng Yang, Dongmei Xu, Xiaomei Zeng, Yuezhong Wen, Weiping Liu
Powdered activated carbons (PACs) with micrometer size are showing great potential for enabling and improving technologies in water treatment. The critical problem in achieving practical application of PAC involves simple, effective fabrication of magnetic PAC and the design of a feasible reactor that can remove pollutants and recover the adsorbent efficiently. Herein, we show that such materials can be fabricated by the combination of PAC and magnetic Fe3O4 with chitosan-Fe hydrogel through a simple co-precipitation method...
February 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27546736/in-situ-growth-of-mos2-nanosheets-on-reduced-graphene-oxide-rgo-surfaces-interfacial-enhancement-of-absorbing-performance-against-electromagnetic-pollution
#12
Aming Xie, Mengxiao Sun, Kun Zhang, Wanchun Jiang, Fan Wu, Meng He
Electromagnetic pollution is rising all over the world. Compared with electromagnetic waves reflection, electromagnetic absorption (EA) is a better choice to balance electromagnetic applications and human health. The highly conductive networks in composites, as well as in species, and the intensity of defect polarization are the most important factors to improving the EA performance of a dielectric material. In this study, an in situ one-pot hydrothermal growth of MoS2 layers on reduced graphene oxide (RGO) surfaces was developed for the synthesis of RGO/MoS2 nanosheets...
September 28, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27539886/a-strategy-to-achieve-enhanced-electromagnetic-interference-shielding-at-low-concentration-with-a-new-generation-of-conductive-carbon-black-in-a-chlorinated-polyethylene-elastomeric-matrix
#13
Subhadip Mondal, Sayan Ganguly, Mostafizur Rahaman, Ali Aldalbahi, Tapan K Chaki, Dipak Khastgir, Narayan Ch Das
The fabrication of scalable and affordable conductive Ketjen carbon black (K-CB)-elastomer composites for adjustable electromagnetic interference (EMI) shielding remains a difficult challenge. Herein, chlorinated polyethylene (CPE)-K-CB composites have been developed by single step solution mixing to achieve high EMI shielding performance associated with absorption dominance potency by conductive dissipation as well as the reflection of electromagnetic waves. The dispersion of K-CB inside the CPE matrix has been corroborated by electron micrographs and atomic force microscopy (AFM)...
September 21, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27463094/measurement-and-mapping-of-the-gsm-based-electromagnetic-pollution-in-the-black-sea-region-of-turkey
#14
Burak Tuysuz, Yigit Mahmutoglu
Electromagnetic pollution caused by mobile communication devices, a new form of environmental pollution, has been one of the most concerning problems to date. Consequences of long-term exposure to the electromagnetic radiation caused by cell phone towers are still unknown and can potentially be a new health hazard. It is important to measure, analyze and map the electromagnetic radiation levels periodically because of the potential risks. The electromagnetic pollution maps can be used for the detection of diseases caused by the radiation...
2017: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/27430061/-hygienic-aspects-of-electromagnetic-pollution-of-indoor-environment
#15
REVIEW
Yu D Gubernskiy, Goshin M E, Kalinina N V, I M Banin
There is presented an overview of studies devoted to the assessment of 50 Hz electromagnetic the radiations in the indoor environment and their impact on the human body. The classification of household appliances depending on their location has been proposed. The levels of intensity of electric and magnetic fields generated by power-frequency (50 Hz) current from a variety of household appliances have been determined. The ranking of household appliances in dependence on the intensity of electromagnetic the radiations has been made...
2016: Gigiena i Sanitariia
https://www.readbyqxmd.com/read/27398549/surface-enhanced-raman-scattering-from-au-nanorod-arrays-with-sub-5-nm-gaps-stuck-out-of-an-aao-template
#16
Zhulin Huang, Guowen Meng, Bin Chen, Chuhong Zhu, Fangming Han, Xiaoye Hu, Xiujuan Wang
Ordered arrays of Au-nanorod-tips protruding from an anodic aluminum oxide (AAO) template are reported as reproducible and active surface-enhanced Raman scattering (SERS) substrates. The Au-nanorods were grown in the nanochannels of the AAO template by use of alternative current electrodeposition, then the template was strengthened using a polymer, and finally the template bottom side was selectively etched to expose the Au-nanorod tips. By controlling the thinning of the AAO-porewalls, the inter-nanorod-gaps were tuned to ~5 nm, forming dense and uniform nano-gap induced "hot spots" among the adjacent Au-nanorod tips...
January 2016: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/27383867/history-of-chemical-sensitivity-and-diagnosis
#17
REVIEW
William J Rea
Histories of mold, pollen, dust, food, chemicals, and electromagnetic field (EMF) sensitivities are the major categories of triggers for chemical sensitivity. They are tied together by the coherence phenomenon, where each has its own frequencies and identifiable EMF; therefore, they can be correlated. The diagnosis of chemical sensitivity can be done accurately in a less-polluted, controlled environment, as was done in these studies. The principles of diagnosis and treatment depend on total environmental and total body pollutant loads, masking or adaptation, bipolarity of response, and biochemical individuality, among others...
September 1, 2016: Reviews on Environmental Health
https://www.readbyqxmd.com/read/27370485/development-of-a-suspension-type-sliding-planar-motion-table-using-magnetic-fluid-lubrication
#18
Xinghui Li, Tadahiko Shinshi, Wataru Hijikata, Yoshihiro Morimoto
A sliding planar motion table system that can be used for the lens driving actuator of a laser cutting machine was developed. The system uses magnetic fluid as the lubricant to avoid the leakage of lubricating oil under the table and reduce environmental pollution. The motion table is suspended from the guide surface by an attractive force generated by electromagnets to reduce the contact and frictional forces between the table and the guide surface. The table is capable of movement in one rotational and two translational directions over the guide surface using six electromagnets and three non-contact displacement sensors...
June 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27115620/scrutinizing-microwave-effects-on-glucose-uptake-in-yeast-cells
#19
Dragomir Stanisavljev, Gordana Gojgić-Cvijović, Itana Nuša Bubanja
Taking into account different literature reports on microwave (MW) effects on living organisms, we thoroughly investigated the influence of constant 2.45 GHz MW irradiation on glucose uptake in yeast cells. A Saccharomyces cerevisiae suspension of 2.9 × 10(8) cells/ml was used in all experiments. A large specific absorption rate of 0.55 W/g of suspension is compensated by efficient external cooling of the reaction vessel, which established a strong non-equilibrium flow of energy through the solution and enabled a constant bulk temperature of 30 °C to within 1 °C during glucose uptake...
January 2017: European Biophysics Journal: EBJ
https://www.readbyqxmd.com/read/27035993/markedly-enhanced-absorption-and-direct-radiative-forcing-of-black-carbon-under-polluted-urban-environments
#20
Jianfei Peng, Min Hu, Song Guo, Zhuofei Du, Jing Zheng, Dongjie Shang, Misti Levy Zamora, Limin Zeng, Min Shao, Yu-Sheng Wu, Jun Zheng, Yuan Wang, Crystal R Glen, Donald R Collins, Mario J Molina, Renyi Zhang
Black carbon (BC) exerts profound impacts on air quality and climate because of its high absorption cross-section over a broad range of electromagnetic spectra, but the current results on absorption enhancement of BC particles during atmospheric aging remain conflicting. Here, we quantified the aging and variation in the optical properties of BC particles under ambient conditions in Beijing, China, and Houston, United States, using a novel environmental chamber approach. BC aging exhibits two distinct stages, i...
April 19, 2016: Proceedings of the National Academy of Sciences of the United States of America
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