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Electromagnetic pollution

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
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
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...
July 27, 2016: Electromagnetic Biology and Medicine
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
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
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
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
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...
April 26, 2016: European Biophysics Journal: EBJ
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
Liying Zhang, Ming Liu, Sunanda Roy, Eng Kee Chu, Kye Yak See, Xiao Hu
Electromagnetic interference (EMI) performance materials are urgently needed to relieve the increasing stress over electromagnetic pollution problems arising from the growing demand for electronic and electrical devices. In this work, a novel ultralight (0.15 g/cm(3)) carbon foam was prepared by direct carbonization of phthalonitrile (PN)-based polymer foam aiming to simultaneously achieve high EMI shielding effectiveness (SE) and deliver effective weight reduction without detrimental reduction of the mechanical properties...
March 23, 2016: ACS Applied Materials & Interfaces
Matilde Anaya, Eduardo Barbará, Jesús Padrón, Sofía F Borrego, Oderlaise Valdés, Alian Molina
INTRODUCTION: Electromagnetic pollution has been detected at the Archivo Nacional de la República de Cuba and the influence of extremely low frequency magnetic fields could be quantified with pathogenic microorganisms isolated from the indoor environment. OBJECTIVE: To quantify the influence of an extremely low frequency magnetic field on the growth of pathogenic microorganisms isolated from the environment at the Archivo Nacional. MATERIALS AND METHODS: We used five microorganisms isolated at the Archivo Nacional: Streptococcus sp...
September 2015: Biomédica: Revista del Instituto Nacional de Salud
Maral Mazloomi Tabrizi, Seyed Ahmad Hosseini
Childhood acute lymphoblastic leukemia (ALL) is one of the most common hematologic malignancies which accounts for one fourth of all childhood cancer cases. Exposure to environmental factors around the time of conception or pregnancy can increase the risk of ALL in the offspring. This study aimed to evaluate the influence of prenatal and postnatal exposure to high voltage power lines on the incidence of childhood ALL. It also examines the role of various factors such as environmental factors and alpha-amylase as a marker in the development of leukemia...
2015: Asian Pacific Journal of Cancer Prevention: APJCP
Raffaela Santoro, Maria Ferraiuolo, Gian Paolo Morgano, Paola Muti, Sabrina Strano
The comet assay can be useful in monitoring DNA damage in single cells caused by exposure to genotoxic agents, such as those causing air, water, and soil pollution (e.g., pesticides, dioxins, electromagnetic fields) and chemo- and radiotherapy in cancer patients, or in the assessment of genoprotective effects of chemopreventive molecules. Therefore, it has particular importance in the fields of pharmacology and toxicology, and in both environmental and human biomonitoring. It allows the detection of single strand breaks as well as double-strand breaks and can be used in both normal and cancer cells...
2016: Methods in Molecular Biology
Gérard Ledoigt, Chaima Sta, Eric Goujon, Dalila Souguir, Ezzeddine El Ferjani
Humans and ecosystems are exposed to highly variable and unknown cocktail of chemicals and radiations. Although individual chemicals are typically present at low concentrations, they can interact with each other resulting in additive or potentially synergistic mixture effects. This was also observed with products obtained by radiation actions such as sunlight or electromagnetic fields that can change the effects of chemicals, such as pesticides, and metal trace elements on health. Concomitant presence of various pesticides and their transformation products adds further complexity to chemical risk assessment since chronic inflammation is a key step for cancer promotion...
2015: Reviews on Environmental Health
M A Contín, M M Benedetto, M L Quinteros-Quintana, M E Guido
Light is the visible part of the electromagnetic radiation within a range of 380-780 nm; (400-700 on primates retina). In vertebrates, the retina is adapted to capturing light photons and transmitting this information to other structures in the central nervous system. In mammals, light acts directly on the retina to fulfill two important roles: (1) the visual function through rod and cone photoreceptor cells and (2) non-image forming tasks, such as the synchronization of circadian rhythms to a 24 h solar cycle, pineal melatonin suppression and pupil light reflexes...
February 2016: Eye
Ben D Spycher, Martin Feller, Martin Röösli, Roland A Ammann, Manuel Diezi, Matthias Egger, Claudia E Kuehni
Children living near highways are exposed to higher concentrations of traffic-related carcinogenic pollutants. Several studies reported an increased risk of childhood cancer associated with traffic exposure, but the published evidence is inconclusive. We investigated whether cancer risk is associated with proximity of residence to highways in a nation-wide cohort study including all children aged <16 years from Swiss national censuses in 1990 and 2000. Cancer incidence was investigated in time to event analyses (1990-2008) using Cox proportional hazards models and incidence density analyses (1985-2008) using Poisson regression...
December 2015: European Journal of Epidemiology
Gengping Wan, Guizhen Wang, Xianqin Huang, Haonan Zhao, Xinyue Li, Kan Wang, Lei Yu, Xiange Peng, Yong Qin
An elegant atomic layer deposition (ALD) method has been employed for controllable preparation of a uniform Fe3O4-coated ZnO (ZnO@Fe3O4) core-shell flower-like nanostructure. The Fe3O4 coating thickness of the ZnO@Fe3O4 nanostructure can be tuned by varying the cycle number of ALD Fe2O3. When serving as additives for microwave absorption, the ZnO@Fe3O4-paraffin composites exhibit a higher absorption capacity than the ZnO-paraffin composites. For ZnO@500-Fe3O4, the effective absorption bandwidth below -10 dB can reach 5...
November 21, 2015: Dalton Transactions: An International Journal of Inorganic Chemistry
Fan Dong, Zaiwang Zhao, Yanjuan Sun, Yuxin Zhang, Shuai Yan, Zhongbiao Wu
To achieve efficient photocatalytic air purification, we constructed an advanced semimetal-organic Bi spheres-g-C3N4 nanohybrid through the in-situ growth of Bi nanospheres on g-C3N4 nanosheets. This Bi-g-C3N4 compound exhibited an exceptionally high and stable visible-light photocatalytic performance for NO removal due to the surface plasmon resonance (SPR) endowed by Bi metal. The SPR property of Bi could conspicuously enhance the visible-light harvesting and the charge separation. The electromagnetic field distribution of Bi spheres involving SPR effect was simulated and reaches its maximum in close proximity to the Bi particle surface...
October 20, 2015: Environmental Science & Technology
Ellen Van De Vijver, Marc Van Meirvenne, Laura Vandenhaute, Samuël Delefortrie, Philippe De Smedt, Timothy Saey, Piet Seuntjens
In environmental assessments, the characterization of urban soils relies heavily on invasive investigation, which is often insufficient to capture their full spatial heterogeneity. Non-invasive geophysical techniques enable rapid collection of high-resolution data and provide a cost-effective alternative to investigate soil in a spatially comprehensive way. This paper presents the results of combining multi-receiver electromagnetic induction and stepped-frequency ground penetrating radar to characterize a former garage site contaminated with petroleum hydrocarbons...
July 2015: Environmental Science. Processes & Impacts
Enrique Valero, Xana Álvarez, Ángeles Cancela, Ángel Sánchez
Each year there are more frequent blooms of green algae and cyanobacteria, representing a serious environmental problem of eutrophication. Electroflocculation (EF) was studied to harvest the algae which are present in reservoirs, as well as different factors which may influence on the effectiveness of the process: the voltage applied to the culture medium, run times, electrodes separation and natural sedimentation. Finally, the viability of its use to obtain biodiesel was studied by direct transesterification...
2015: Bioresource Technology
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