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Kostishin VG, Isaev IM, Salogub DV. Radio-Absorbing Magnetic Polymer Composites Based on Spinel Ferrites: A Review. Polymers (Basel) 2024; 16:1003. [PMID: 38611261 PMCID: PMC11014136 DOI: 10.3390/polym16071003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 03/28/2024] [Accepted: 03/30/2024] [Indexed: 04/14/2024] Open
Abstract
Ferrite-containing polymer composites are of great interest for the development of radar-absorbing and -shielding materials (RAMs and RSMs). The main objective of RAM and RSM development is to achieve a combination of efficient electromagnetic wave (EMW) absorption methods with advantageous technological and mechanical properties as well as acceptable weight and dimensions in the final product. This work deals with composite RAMs and RSMs containing spinel-structured ferrites. These materials are chosen since they can act as efficient RAMs in the form of ceramic plates and as fillers for radar-absorbing polymer composites (RAC) for electromagnetic radiation (EMR). Combining ferrites with conducting fillers can broaden the working frequency range of composite RAMs due to the activation of various absorption mechanisms. Ferrite-containing composites are the most efficient materials that can be used as the working media of RAMs and RSMs due to a combination of excellent dielectric and magnetic properties of ferrites. This work contains a brief review of the main theoretical standpoints on EMR interaction with materials, a comparison between the radar absorption properties of ferrites and ferrite-polymer composites and analysis of some phenomenological aspects of the radar absorption mechanisms in those composites.
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Affiliation(s)
- Vladimir G. Kostishin
- Department of Materials Technology of Electronics, National Research University of Technology “MISA”, Leninsky Prospect, 4, 119049 Moscow, Russia; (I.M.I.); (D.V.S.)
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2
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De Vito S, Del Giudice A, Di Francia G. Electric Transmission and Distribution Network Air Pollution. SENSORS (BASEL, SWITZERLAND) 2024; 24:587. [PMID: 38257682 PMCID: PMC10818988 DOI: 10.3390/s24020587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 01/10/2024] [Accepted: 01/13/2024] [Indexed: 01/24/2024]
Abstract
There is a consensus within the scientific community regarding the effects on the environment, health, and climate of the use of renewable energy sources, which is characterized by a rate of harmful polluting emissions that is significantly lower than that typical of fossil fuels. On the other hand, this transition towards the use of more sustainable energy sources will also be characterized by an increasingly widespread electrification rate. In this work, we want to discuss whether electricity distribution and transmission networks and their main components are characterized by emissions that are potentially harmful to the environment and human health during their operational life. We will see that the scientific literature on this issue is rather limited, at least until now. However, conditions are reported in which the network directly causes or at least promotes the emissions of polluting substances into the environment. For the most part, the emissions recorded, rather than their environmental or human health impacts, are studied as part of the implementation of techniques for the early determination of faults in the network. It is probable that with the increasing electrification of energy consumption, the problem reported here will become increasingly relevant.
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Affiliation(s)
| | | | - Girolamo Di Francia
- ENEA—Italian National Agency for New Technologies, Energy and Sustainable Economic Development, P.le E. Fermi, 1, 80055 Napoli, Italy; (S.D.V.); (A.D.G.)
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3
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Askaripour K, Żak A. A systematic review on cellular responses of Escherichia coli to nonthermal electromagnetic irradiation. Bioelectromagnetics 2024; 45:16-29. [PMID: 37807247 DOI: 10.1002/bem.22484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 06/23/2023] [Accepted: 08/07/2023] [Indexed: 10/10/2023]
Abstract
Investigation of Escherichia coli under electromagnetic fields is of significance in human studies owing to its short doubling time and human-like DNA mechanisms. The present review aims to systematically evaluate the literature to conclude causality between 0 and 300 GHz electromagnetic fields and biological effects in E. coli. To that end, the OHAT methodology and risk of bias tool were employed. Exponentially growing cells exposed for over 30 min at temperatures up to3 7 ∘ C $3{7}^{\circ }\,{\rm{C}}$ with fluctuations below1 ∘ C ${1}^{\circ }\,{\rm{C}}$ were included from the Web-of-Knowledge, PubMed, or EMF-Portal databases. Out of 904 records identified, 25 articles satisfied the selection criteria, with four excluded during internal validation. These articles examined cell growth (11 studies), morphology (three studies), and gene regulation (11 studies). Most experiments (85%) in the included studies focused on the extremely low-frequency (ELF) range, with 60% specifically at 50 Hz. Changes in growth rate were observed in 74% of ELF experiments and 71% of radio frequency (RF) experiments. Additionally, 80% of ELF experiments showed morphology changes, while gene expression changes were seen in 33% (ELF) and 50% (RF) experiments. Due to the limited number of studies, especially in the intermediate frequency and RF ranges, establishing correlations between EMF exposure and biological effects on E. coli is not possible.
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Affiliation(s)
- Khadijeh Askaripour
- Department of Biomechatronics, Gdansk University of Technology, Gdansk, Pomorskie, Poland
| | - Arkadiusz Żak
- Department of Biomechatronics, Gdansk University of Technology, Gdansk, Pomorskie, Poland
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4
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Korenevskiy NA, Al-Kasasbeh RT, Krikunova EA, Rodionova SN, Shaqdan A, Al-Habahbeh OM, Filist S, Alshamasin MS, Khrisat MS, Ilyash M. Fuzzy-Based Bioengineering System for Predicting and Diagnosing Diseases of the Nervous System Triggered by the Interaction of Industrial Frequency Electromagnetic Fields. Crit Rev Biomed Eng 2024; 52:1-16. [PMID: 38884210 DOI: 10.1615/critrevbiomedeng.2024053240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
The study aims to enhance the standard of medical care for individuals working in the electric power industry who are exposed to industrial frequency electromagnetic fields and other relevant risk factors. This enhancement is sought through the integration of fuzzy mathematical models with contemporary information and intellectual technologies. The study addresses the challenges of forecasting and diagnosing illnesses within a specific demographic characterized by a combination of poorly formalized issues with interconnected conditions. To tackle this complexity, a methodological framework was developed for synthesizing hybrid fuzzy decision rules. This approach combines clinical expertise with artificial intelligence methodologies to promote innovative problem-solving strategies. Additionally, the researchers devised an original method to evaluate the body's protective capacity, which was integrated into these decision rules to enhance the precision and efficacy of medical decision-making processes. The research findings indicate that industrial frequency electromagnetic fields contribute to illnesses of societal significance. Additionally, it highlights that these effects are worsened by other risk factors such as adverse microclimates, noise, vibration, chemical exposure, and psychological stress. Diseases of the neurological, immunological, cardiovascular, genitourinary, respiratory, and digestive systems are caused by these variables in conjunction with unique physical traits. The development of mathematical models in this study makes it possible to detect and diagnose disorders in workers exposed to electromagnetic fields early on, especially those pertaining to the autonomic nervous system and heart rhythm regulation. The results can be used in clinical practice to treat personnel in the electric power industry since expert evaluation and modeling showed high confidence levels in decision-making accuracy.
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Affiliation(s)
| | | | | | - Sofia N Rodionova
- Eurasian National University named after L.N. Gumilyov, Nur-Sultan, Kazakhstan; South-West State University, Kursk, Russia
| | | | - Osama M Al-Habahbeh
- Department of Mechatronics Engineering, School of Engineering, The University of Jordan, Amman, Jordan
| | | | - Mahdi Salman Alshamasin
- Department of Mechatronics Engineering, Faculty of Engineering Technology, Al-Balqa Applied University, Amman, Jordan
| | - Mohammad S Khrisat
- Department of Mechatronics Engineering, Faculty of Engineering Technology, Al-Balqa Applied University, Amman, Jordan
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5
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Cheng Z, Du Z, Chen H, Zhao Q, Shi Y, Wang H, Ye Y, Yang S. Metal-Bonded Atomic Layers of Transition Metal Carbides (MXenes). ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2302141. [PMID: 37172077 DOI: 10.1002/adma.202302141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/10/2023] [Indexed: 05/14/2023]
Abstract
Although 2D transition metal carbides and nitrides (MXenes) have fantastic physical and chemical properties as well as wide applications, it remains challenging to produce stable MXenes due to their rapid structural degradation. Here, unique metal-bonded atomic layers of transition metal carbides with high stabilities are produced via a simple topological reaction between chlorine-terminated MXenes and selected metals, where the metals enable them to not only remove partially Cl terminations, but also bond with adjacent atomic MXene slabs, driven by the symmetry of MAX phases. The films constructed from Al-bonded Ti3 C2 Clx atomic layers show high oxidation resistance up to 400 °C and low sheet resistance of 9.3 Ω sq-1 . Coupled to the multilayer structure, the Al-bonded Ti3 C2 Clx film displays a significantly improved electromagnetic interference (EMI) shielding capability with a total shielding effectiveness value of 39 dB at a low thickness of 3.1 µm, outperforming pure Ti3 C2 Clx film.
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Affiliation(s)
- Zongju Cheng
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Zhiguo Du
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Hao Chen
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Qi Zhao
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Yu Shi
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Haiyang Wang
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Yuxuan Ye
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Shubin Yang
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
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6
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Lee JS, Kim JW, Lee JH, Son YK, Kim YB, Woo K, Lee C, Kim ID, Seok JY, Yu JW, Park JH, Lee KJ. Flash-Induced High-Throughput Porous Graphene via Synergistic Photo-Effects for Electromagnetic Interference Shielding. NANO-MICRO LETTERS 2023; 15:191. [PMID: 37532956 PMCID: PMC10397175 DOI: 10.1007/s40820-023-01157-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 06/17/2023] [Indexed: 08/04/2023]
Abstract
Porous 2D materials with high conductivity and large surface area have been proposed for potential electromagnetic interference (EMI) shielding materials in future mobility and wearable applications to prevent signal noise, transmission inaccuracy, system malfunction, and health hazards. Here, we report on the synthesis of lightweight and flexible flash-induced porous graphene (FPG) with excellent EMI shielding performance. The broad spectrum of pulsed flashlight induces photo-chemical and photo-thermal reactions in polyimide films, forming 5 × 10 cm2-size porous graphene with a hollow pillar structure in a few milliseconds. The resulting material demonstrated low density (0.0354 g cm-3) and outstanding absolute EMI shielding effectiveness of 1.12 × 105 dB cm2 g-1. The FPG was characterized via thorough material analyses, and its mechanical durability and flexibility were confirmed by a bending cycle test. Finally, the FPG was utilized in drone and wearable applications, showing effective EMI shielding performance for internal/external EMI in a drone radar system and reducing the specific absorption rate in the human body.
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Affiliation(s)
- Jin Soo Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jeong-Wook Kim
- School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jae Hee Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Yong Koo Son
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Young Bin Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Kyoohee Woo
- Department of Printed Electronics, Nano-Convergence Manufacturing Systems Research Division, Korea Institute of Machinery and Materials (KIMM), 156 Gajeongbuk-Ro, Yuseong-Gu, Daejeon, 34103, Republic of Korea
| | - Chanhee Lee
- School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Il-Doo Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jae Young Seok
- Department of Mechanical System Design Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Republic of Korea
| | - Jong Won Yu
- School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Jung Hwan Park
- Department of Mechanical Engineering (Department of Aeronautics, Mechanical and Electronic Convergence Engineering), Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk, 39177, Republic of Korea.
| | - Keon Jae Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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7
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Molina-Montenegro MA, Acuña-Rodríguez IS, Ballesteros GI, Baldelomar M, Torres-Díaz C, Broitman BR, Vázquez DP. Electromagnetic fields disrupt the pollination service by honeybees. SCIENCE ADVANCES 2023; 9:eadh1455. [PMID: 37172085 PMCID: PMC10181175 DOI: 10.1126/sciadv.adh1455] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 04/11/2023] [Indexed: 05/14/2023]
Abstract
We assessed the effect that electromagnetic field (EMF) exerts on honeybees' pollination efficiency using field and laboratory experiments. First, we measured levels of gene and protein expression in metabolic pathways involved in stress and behavioral responses elicited by EMF. Second, we assessed the effect of EMF on honeybee behavior and seed production by the honeybee-pollinated California poppy and, lastly, by measuring the consequences of pollination failure on plants' community richness and abundance. EMF exposure exerted strong physiological stress on honeybees as shown by the enhanced expression of heat-shock proteins and genes involved in antioxidant activity and affected the expression levels of behavior-related genes. Moreover, California poppy individuals growing near EMF received fewer honeybee visits and produced fewer seeds than plants growing far from EMF. Last, we found a hump-shaped relationship between EMF and plant species richness and plant abundance. Our study provides conclusive evidence of detrimental impacts of EMF on honeybee's pollination behavior, leading to negative effects on plant community.
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Affiliation(s)
- Marco A. Molina-Montenegro
- Centro de Ecología Integrativa (CEI), Instituto de Ciencias Biológicas, Universidad de Talca, Campus Talca, Talca, Chile
| | - Ian S. Acuña-Rodríguez
- Centro de Ecología Integrativa (CEI), Instituto de Ciencias Biológicas, Universidad de Talca, Campus Talca, Talca, Chile
- Instituto de Investigación Interdisciplinaria (I), Universidad de Talca, Campus Talca, Talca, Chile
| | - Gabriel I. Ballesteros
- Centro de Ecología Integrativa (CEI), Instituto de Ciencias Biológicas, Universidad de Talca, Campus Talca, Talca, Chile
- Instituto de Investigación Interdisciplinaria (I), Universidad de Talca, Campus Talca, Talca, Chile
| | - Mariela Baldelomar
- Centro de Ecología Integrativa (CEI), Instituto de Ciencias Biológicas, Universidad de Talca, Campus Talca, Talca, Chile
| | - Cristian Torres-Díaz
- Grupo de Biodiversidad y Cambio Global (BCG), Departamento de Ciencias Básicas, Universidad del Bío-Bío, Chillán, Chile
| | - Bernardo R. Broitman
- Departamento de Ciencias, Facultad de Artes Liberales, Universidad Adolfo Ibáñez, Viña del Mar, Chile
| | - Diego P. Vázquez
- Instituto Argentino de Investigaciones de las Zonas Áridas, CONICET, Mendoza, Argentina
- Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Mendoza, Argentina
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8
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Sadek R, Sharawi MS, Dubois C, Tantawy H, Chaouki J. Reduced Graphene Oxide/Barium Ferrite Ceramic Nanocomposite Synergism for High EMI Wave Absorption. ACS OMEGA 2023; 8:15099-15113. [PMID: 37151556 PMCID: PMC10157665 DOI: 10.1021/acsomega.2c08168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 03/06/2023] [Indexed: 05/09/2023]
Abstract
The developed nanocomposite exhibits significantly enhanced shielding performance due to the synergistic effect of high dielectric and magnetic loss materials, which modifies the material's impedance and improves its absorption ability. Different weight percentages (0, 1, 5, 10, 15, 20, and 25 wt %) of thermally treated chemically reduced graphene oxide (TCRGO) were combined with two types of magnets, barium hexaferrite (BF) and magnetite (MAG), using a dry powder compaction technique to produce binary ceramic nanocomposite sheets. The shielding performance of a 1 mm thick compressed nanoceramic sheet over the X-band was evaluated using a vector network analyzer. The 25% TCRGO showed high shielding performance for both BF and MAG, while BF had a total shielding efficiency (SET) that exceeded MAG by 130%. The SET of 25 wt % TCRGO/BF was 52 dB, with a 41 dB absorption shielding efficiency (SEA). Additionally, the effect of different levels of incident electromagnetic wave power (0.001-1000 mW) at various thicknesses (1, 2, and 5 mm) was explored. At 1000 mW, the 5 mm TCRGO/BF had an SET of 99 dB, an SEA of 91 dB, and a reflection shielding efficiency (SER) of 8 dB. The use of BF as a hard magnet paired with TCRGO exhibited excellent and stable electromagnetic shielding performance.
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Affiliation(s)
- Ramy Sadek
- Chemical
Engineering Department, Polytechnique Montréal, Montréal, Quebec H3T 1J4, Canada
| | - Mohammad S. Sharawi
- Poly-Grames
Research Center, Electrical Engineering Department, Polytechnique Montréal, Montréal, Quebec H3T 1J4, Canada
| | - Charles Dubois
- Chemical
Engineering Department, Polytechnique Montréal, Montréal, Quebec H3T 1J4, Canada
| | - Hesham Tantawy
- Chemical
Engineering Department, Military Technical
College, Cairo 11766, Egypt
| | - Jamal Chaouki
- Chemical
Engineering Department, Polytechnique Montréal, Montréal, Quebec H3T 1J4, Canada
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9
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Morales-Suárez-Varela M, Llopis-Morales A, Doccioli C, Donzelli G. Relationship between parental exposure to radiofrequency electromagnetic fields and primarily hematopoietic neoplasms (lymphoma, leukemia) and tumors in the central nervous system in children: a systematic review. REVIEWS ON ENVIRONMENTAL HEALTH 2023; 0:reveh-2022-0248. [PMID: 36944196 DOI: 10.1515/reveh-2022-0248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Low-frequency electromagnetic fields have grown exponentially in recent years due to technological development and modernization. The World Health Organization (WHO)/International Agency for Research on Cancer (IARC) has classified radiofrequency electromagnetic fields (RF-EMFs) as possibly carcinogenic to humans (Group 2B), and recent studies have investigated the association between exposure to electromagnetic fields in parents and possible health effects in children, especially the development of tumours of the central nervous system (CNS). The objective of this systematic review was to collate all evidence on the relationship between parental occupational exposure to electromagnetic fields and the development of CNS cancer in children and to evaluate this association. This review was prepared according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. PubMed, Embase, and Web of Science were searched from January 1990 to April 2021. The search was conducted using the following search string: "occupational" AND "child" AND "electromagnetic" AND "cancer". Seventeen articles met our inclusion criteria: 13 case-control studies, two cohort studies, and 2 meta-analyses. Most of the studies showed several methodological weaknesses that limited their results. Due to a lack of consistency regarding the outcome as well as the heterogeneity in the reviewed studies, the body of evidence for the effects of parental exposure to electromagnetic fields is not clear. Methodological heterogeneity in the way that studies were conducted could be responsible for the lack of consistency in the findings. Overall, the body of evidence allows no conclusion on the relationship between parental exposure to electromagnetic fields and the occurrence of CNS tumours in children.
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Affiliation(s)
- María Morales-Suárez-Varela
- Department of Preventive Medicine and Public Health, Food Sciences, Toxicology, and Legal Medicine, School of Pharmacy, University of Valencia, Avenida Vicente Andres Estellés s/n, Burjassot, 46100 Valencia, Spain
- CIBER of Epidemiology and Public Health (CIBERESP). Av. Monforte de Lemos, 3-5. Pabellón 11. Planta 0 28029 Madrid
| | - Agustin Llopis-Morales
- Department of Preventive Medicine and Public Health, Food Sciences, Toxicology, and Legal Medicine, School of Pharmacy, University of Valencia, Avenida Vicente Andres Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Chiara Doccioli
- Department of Statistics, Computer Science and Applications "G. Parenti", University of Florence, Florence, Italy
| | - Gabriele Donzelli
- Department of Health Sciences, University of Florence, Viale GB Morgagni 48, 50134 Florence, Italy
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López-Sánchez J, Peña Á, Serrano A, Del Campo A, Rodríguez de la Fuente Ó, Carmona N, Matatagui D, Horrillo MDC, Rubio-Zuazo J, Navarro E, Marín P. Generation of Defective Few-Layered Graphene Mesostructures by High-Energy Ball Milling and Their Combination with FeSiCuNbB Microwires for Reinforcing Microwave Absorbing Properties. ACS APPLIED MATERIALS & INTERFACES 2023; 15:3507-3521. [PMID: 36606586 DOI: 10.1021/acsami.2c19886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Defective few-layered graphene mesostructures (DFLGMs) are produced from graphite flakes by high-energy milling processes. We obtain an accurate control of the generated mesostructures, as well as of the amount and classification of the structural defects formed, providing a functional material for microwave absorption purposes. Working under far-field conditions, competitive values of minimum reflection loss coefficient (RLmin) = -21.76 dB and EAB = 4.77 dB are achieved when DFLGMs are immersed in paints at a low volume fraction (1.95%). One step forward is developed by combining them with the excellent absorption behavior that offers amorphous Fe73.5Si13.5B9Cu1Nb microwires (MWs), varying their filling contents, which are below 3%. We obtain a RLmin improvement of 47% (-53.08 dB) and an EAB enhancement of 137% (4 dB) compared to those obtained by MW-based paints. Furthermore, a fmin tunability is demonstrated, maintaining similar RLmin and EAB values, irrespective of an ideal matching thickness. In this scenario, the Maxwell-Garnet standard model is valid, and dielectric losses mainly come from multiple reflections, interfacial and dielectric polarizations, which greatly boost the microwave attenuation of MWs. The present concept can remarkably enhance not only the MW attenuation but can also apply to other microwave absorption architectures of technological interest by adding low quantities of DFLGMs.
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Affiliation(s)
- Jesús López-Sánchez
- Instituto de Magnetismo Aplicado (IMA), Universidad Complutense de Madrid-Administrador de Infraestructuras Ferroviarias (UCM─ADIF), 28230Las Rozas, Spain
- Departamento de Electrocerámica, Instituto de Cerámica y Vidrio─Consejo Superior de Investigaciones Científicas (ICV─CSIC), 28049Madrid, Spain
| | - Álvaro Peña
- Instituto de Magnetismo Aplicado (IMA), Universidad Complutense de Madrid-Administrador de Infraestructuras Ferroviarias (UCM─ADIF), 28230Las Rozas, Spain
- Departamento de Física de Materiales, Universidad Complutense de Madrid (UCM), 28040Madrid, Spain
| | - Aída Serrano
- Departamento de Electrocerámica, Instituto de Cerámica y Vidrio─Consejo Superior de Investigaciones Científicas (ICV─CSIC), 28049Madrid, Spain
| | - Adolfo Del Campo
- Departamento de Electrocerámica, Instituto de Cerámica y Vidrio─Consejo Superior de Investigaciones Científicas (ICV─CSIC), 28049Madrid, Spain
| | - Óscar Rodríguez de la Fuente
- Instituto de Magnetismo Aplicado (IMA), Universidad Complutense de Madrid-Administrador de Infraestructuras Ferroviarias (UCM─ADIF), 28230Las Rozas, Spain
- Departamento de Física de Materiales, Universidad Complutense de Madrid (UCM), 28040Madrid, Spain
| | - Noemí Carmona
- Instituto de Magnetismo Aplicado (IMA), Universidad Complutense de Madrid-Administrador de Infraestructuras Ferroviarias (UCM─ADIF), 28230Las Rozas, Spain
- Departamento de Física de Materiales, Universidad Complutense de Madrid (UCM), 28040Madrid, Spain
| | - Daniel Matatagui
- Instituto de Magnetismo Aplicado (IMA), Universidad Complutense de Madrid-Administrador de Infraestructuras Ferroviarias (UCM─ADIF), 28230Las Rozas, Spain
- Departamento de Física de Materiales, Universidad Complutense de Madrid (UCM), 28040Madrid, Spain
- SENSAVAN, Instituto de Tecnologías Físicas y de la Información─Consejo Superior de Investigaciones Científicas (ITEFI─CSIC), 28006Madrid, Spain
| | - María Del Carmen Horrillo
- SENSAVAN, Instituto de Tecnologías Físicas y de la Información─Consejo Superior de Investigaciones Científicas (ITEFI─CSIC), 28006Madrid, Spain
| | - Juan Rubio-Zuazo
- Spanish CRG BM25-SpLine at The ESRF─The European Synchrotron, 38000Grenoble, France
- Instituto de Ciencia de Materiales de Madrid─Consejo Superior de Investigaciones Científicas (ICMM─CSIC), 28049Madrid, Spain
| | - Elena Navarro
- Instituto de Magnetismo Aplicado (IMA), Universidad Complutense de Madrid-Administrador de Infraestructuras Ferroviarias (UCM─ADIF), 28230Las Rozas, Spain
- Departamento de Física de Materiales, Universidad Complutense de Madrid (UCM), 28040Madrid, Spain
| | - Pilar Marín
- Instituto de Magnetismo Aplicado (IMA), Universidad Complutense de Madrid-Administrador de Infraestructuras Ferroviarias (UCM─ADIF), 28230Las Rozas, Spain
- Departamento de Física de Materiales, Universidad Complutense de Madrid (UCM), 28040Madrid, Spain
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11
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Sharma S, Bahel S, Kaur Katnoria J. Evaluation of oxidative stress and genotoxicity of 900 MHz electromagnetic radiations using Trigonella foenum-graecum test system. PROTOPLASMA 2023; 260:209-224. [PMID: 35546647 DOI: 10.1007/s00709-022-01768-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 04/24/2022] [Indexed: 06/15/2023]
Abstract
Unprecedented growth in the communication sector and expanded usage of the number of wireless devices in the past few decades have resulted in a tremendous increase in emissions of non-ionizing electromagnetic radiations (EMRs) in the environment. The widespread EMRs have induced many significant changes in biological systems leading to oxidative stress as well as DNA damage. Considering this, the present study was planned to study the effects of EMRs at 900 MHz frequency with the power density of 10.0 dBm (0.01 W) at variable exposure periods (0.5 h, 1 h, 2 h, 4 h, and 8 h per day for 7 days) on percentage germination, morphological characteristics, protein content, lipid peroxidation in terms of malondialdehyde content (MDA), and antioxidant defense system of Trigonella foenum-graecum test system. The genotoxicity was also evaluated using similar conditions. It was observed that EMRs significantly decreased the germination percentage at an exposure time of 4 h and 8 h. Fresh weight and dry weight of root and shoot did not show significant variations, while the root and shoot length have shown significant variations for 4 h and 8 h exposure period. Further, EMRs enhanced MDA indicating lipid peroxidation. In response to exposure of EMRs, there was a significant up-regulation in the activities of enzymes such as ascorbate peroxidase (APX), superoxide dismutase (SOD), glutathione-S-transferase (GST), guaiacol peroxidase (POD), and glutathione reductase (GR) in the roots and shoots of Trigonella-foenum graecum. The genotoxicity study showed the induction of chromosomal aberrations in root tip cells of the Trigonella foenum-graecum test system. The present study revealed the induction of oxidative stress and genotoxicity of EMRs exposure in the test system.
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Affiliation(s)
- Surbhi Sharma
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, 143005, India
| | - Shalini Bahel
- Department of Electronics Technology, Guru Nanak Dev University, Amritsar, 143005, India
| | - Jatinder Kaur Katnoria
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, 143005, India.
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Li Y, Sun C, Zhou H, Huang H, Chen Y, Duan X, Huang S, Li J. Extremely Low-Frequency Electromagnetic Field Impairs the Development of Honeybee (Apis cerana). Animals (Basel) 2022; 12:ani12182420. [PMID: 36139284 PMCID: PMC9495099 DOI: 10.3390/ani12182420] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/07/2022] [Accepted: 09/07/2022] [Indexed: 11/30/2022] Open
Abstract
Simple Summary The ELF-EMF pollution generated by the increase in electrically powered devices and power lines, accompanied by economic development, has a widespread effect on surrounding organisms. Honeybees are one of the most important pollinators. The decline in the honeybee population caused by a variety factors, including EMFs, has attracted attention worldwide. It was already known that ELF-EMFs could impair the ability of learning and cognition, causing foraging bees to lose their ability to find their way home. The pollination ability of foraging bees is derived from the rearing quantity of larvae and continuous eclosion of new adult bees in the colony. However, the effect of ELF-EMFs on honeybee larvae is not clear. The aims and objectives of this study were therefore to investigate it. The results showed that ELF-EMF exposure decreases honeybee survival rate and body weight and extends the duration of development time. Transcriptome sequencing showed that ELF-EMF exposure decreases the biological process of nutrient and energy metabolism, impedes the degradation of larvae tissues and the rebuilding of pupae tissues in the metamorphosis process, and seriously interferes with the growth and development of honeybee larvae. This provides an experimental basis and new perspective for protecting honeybee populations from ELF-EMF pollution. Abstract Increasing ELF-EMF pollution in the surrounding environment could impair the cognition and learning ability of honeybees, posing a threat to the honeybee population and its pollination ability. In a social honeybee colony, the numbers of adult bees rely on the successful large-scale rearing of larvae and continuous eclosion of new adult bees. However, no studies exist on the influence of ELF-EMFs on honeybee larvae. Therefore, we investigated the survival rate, body weight, and developmental duration of first instar larvae continuously subjected to ELF-EMF exposure. Moreover, the transcriptome of fifth instar larvae were sequenced for analyzing the difference in expressed genes. The results showed that ELF-EMF exposure decreases the survival rate and body weight of both white-eye pupae and newly emerged adults, extends the duration of development time and seriously interferes with the process of metamorphosis and pupation. The transcriptome sequencing showed that ELF-EMF exposure decreases the nutrient and energy metabolism and impedes the degradation of larvae tissues and rebuilding of pupae tissues in the metamorphosis process. The results provide an experimental basis and a new perspective for the protection of honeybee populations from ELF-EMF pollution.
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Affiliation(s)
- Yingjiao Li
- College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Chaoxia Sun
- College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - He Zhou
- College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Hongji Huang
- College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yijie Chen
- Jinshan College of Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xinle Duan
- College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Fujian Honey Bee Biology Observation Station, Ministry of Agriculture and Rural Affairs, Fuzhou 350002, China
| | - Shaokang Huang
- College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Fujian Honey Bee Biology Observation Station, Ministry of Agriculture and Rural Affairs, Fuzhou 350002, China
| | - Jianghong Li
- College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Fujian Honey Bee Biology Observation Station, Ministry of Agriculture and Rural Affairs, Fuzhou 350002, China
- Correspondence:
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13
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L M, S A, Menon SK. A novel and effective technique to reduce electromagnetic radiation absorption on biotic components at 2.45 GHz. Electromagn Biol Med 2022; 41:184-200. [PMID: 35352614 DOI: 10.1080/15368378.2022.2046048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A strong evidence of the effects of radiation absorption on the living community together with a better solution to reduce the radiation intensity without compromising the usage of wireless communication systems is presented. This study analyses the radiation effects on living things and validates the proposed techniques for specific absorption rate (SAR) value reduction at 2.45 GHz. To reduce these radiation impacts on the living community, proper shielding from the radiation and effectively reorienting antenna radiation patterns are the solutions suggested. An analogous antenna configuration in wireless communication systems - a coplanar waveguide fed loop antenna is considered and an open loop resonator (OLR) optimized in ANSYS HFSS at 2.45 GHz is incorporated on the back side of the proposed antenna for achieving SAR value reduction. Theoretical and experimental validation is carried out by measuring the variation in absorption power on each vegetable sample using vector network analyzer E5080A. The existence of OLR on the back side of the antenna reduces the absorption power upto 2 dB. From experimental validation, the proposed technique provides 88% to 98% reduction in SAR value when tested in each sample. Along with this OLR exhibits the capability to enhance the shielding characteristics to the controlled environment of experimental setup for analyzing the stages of seed germination, which helps in reducing the reported radiation effects and growth retardation. The proposed method of EMR reduction with miniaturized planar resonator can be effectively used in the communication systems operating at 2.45 GHz for creating a reduced radiation environment.
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Affiliation(s)
- Meenu L
- Center for Wireless Networks & Applications (WNA), Amrita Vishwa Vidyapeetham, Amritapuri, India
| | - Aiswarya S
- Center for Wireless Networks & Applications (WNA), Amrita Vishwa Vidyapeetham, Amritapuri, India
| | - Sreedevi K Menon
- Department of Electronics and Communication Engineering, Amrita Vishwa Vidyapeetham, Amritapuri, India
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14
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Sadek R, Sharawi MS, Dubois C, Tantawy H, Chaouki J. Superior quality chemically reduced graphene oxide for high performance EMI shielding materials. RSC Adv 2022; 12:22608-22622. [PMID: 36105968 PMCID: PMC9372871 DOI: 10.1039/d2ra02678c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 08/02/2022] [Indexed: 01/22/2023] Open
Abstract
The chemical reduction process of graphene oxide combined with a mild and controllable thermal treatment under vacuum at 200 °C for 4 hours provided a cost-effective, scalable, and high-yield route for Reduced Graphene Oxide (RGO) industrial production and became a potential candidate for producing electromagnetic interference (EMI) shielding. We investigated graphite, and RGO using l-ascorbic acid and Sodium borohydride before and after thermal treatment by carefully evaluating the chemical and morphological structures. The thermally treated l-ascorbic Acid reduction route (TCRGOL) conductivity was 2.14 × 103 S m−1 and total shielding efficiency (SET) based on mass loadings per area of shielding was 94 dB with about one-tenth less graphite weight and surpassing other graphene reduction mechanisms in the frequency range of 8.2–12.4 GHz, i.e., X-band, at room temperature while being tested using the waveguide line technique. The developed treatment represents valuable progress in the path to chemical reduction using a safe reducing agent and offering superior quality RGO rarely achieved with the top-down technique, providing a high EMI shielding performance. The developed two-step protocol offers a superior reduced graphene oxide TCRGOL quality (7 layers), and its SET was 94 dB over the X-band.![]()
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Affiliation(s)
- Ramy Sadek
- Chemical Engineering Department, Polytechnique Montréal, Montréal, H3C 3A7, Canada
| | - Mohammad S. Sharawi
- Poly-Grames Research Center, Electrical Engineering Department, Polytechnique Montréal, Montréal, QC H3C 3A7, Canada
| | - Charles Dubois
- Chemical Engineering Department, Polytechnique Montréal, Montréal, H3C 3A7, Canada
| | - Hesham Tantawy
- Chemical Engineering Department, Military Technical College, Cairo, Egypt
| | - Jamal Chaouki
- Chemical Engineering Department, Polytechnique Montréal, Montréal, H3C 3A7, Canada
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15
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Shang S, Zhao N, Chen Y, Wang X, Hu F, Fan B, Zhao B, Lu H, Wang H, Zhang R. Ti 3C 2T x/rGO Aerogel Towards High Electromagnetic Wave Absorbing and Thermal Resistance. CrystEngComm 2022. [DOI: 10.1039/d2ce00578f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Facing the fast development of telecommunication technology, traditional electromagnetic wave absorption materials are unable to meet the microwave shielding requirements in practical application. Herein, a Ti3C2Tx MXene/rGO composite aerogel was...
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Verma S, Mili M, Dhangar M, Jagatheesan K, Paul S, Bajpai H, Vedanti N, Mallik J, Khan MA, Bhargaw HN, Hashmi SAR, Srivastava AK. A review on efficient electromagnetic interference shielding materials by recycling waste-a trio of land to lab to land concept. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:64929-64950. [PMID: 34599440 DOI: 10.1007/s11356-021-16680-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 09/19/2021] [Indexed: 06/13/2023]
Abstract
The materials used in electrical and electronic applications have great importance and broader applications, but they have severe electromagnetic interference (EMI). These materials have extensive applications in broadcasting, medical industries, research, defence sectors, communication and similar fields. The EMI can be addressed by using effective EMI shielding materials. This review presents a detailed, comprehensive description for making electromagnetic interference shielding material by recycling various wastes. It starts with highlighting the overview of electromagnetic interference shielding (EMI) and its theoretical aspects. It provides a comprehensive and detailed understanding of recent trends in the novel approaches towards fabricating EMI shielding from industrial waste, agricultural waste and other miscellaneous wastes. This paper critically reviews the works related to the recycling of wastes like red mud (waste from the aluminium refining industry), ground tyre rubber, tea waste (biowaste) from tea industries, bagasse (waste from sugar cane industry), peanut and hazelnut shells (agricultural waste), waste tissue paper and polyethylene and other miscellaneous wastes like hydrocarbon carbon black and ash for the fabrication of highly effective electromagnetic (EM) interference shielding materials. Highly effective results have been reported using red mud showing maximum efficiency of 51.4 dB in X-band range, various agricultural waste displaying reflection loss of up to - 87.117 dB (in the range 0.01 to 20 GHz) and miscellaneous waste giving EMI SE of 80 dB in X-band frequency. A separate section is dedicated to emphasizing future work and recommendations.
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Affiliation(s)
- Sarika Verma
- Council of Scientific and Industrial Research-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India.
- AcSIR-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India.
| | - Medha Mili
- Council of Scientific and Industrial Research-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
- AcSIR-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
| | - Manish Dhangar
- Council of Scientific and Industrial Research-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
| | | | - Sriparna Paul
- Council of Scientific and Industrial Research-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
- AcSIR-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
| | - Harsh Bajpai
- Council of Scientific and Industrial Research-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
| | - Nimisha Vedanti
- Council of Scientific and Industrial Research-National Geophysical Research Institute (NGRI), Hyderabad, 500007, India
| | - Jyotirmoy Mallik
- Earth and Environmental Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhauri, Bhopal, 462066, India
| | - Mohammed Akram Khan
- Council of Scientific and Industrial Research-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
- AcSIR-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
| | - Hari Narayan Bhargaw
- Council of Scientific and Industrial Research-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
- AcSIR-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
| | - Sayed Azhar Rasheed Hashmi
- Council of Scientific and Industrial Research-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
- AcSIR-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
| | - Avanish Kumar Srivastava
- Council of Scientific and Industrial Research-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
- AcSIR-Advanced Materials and Processes Research Institute (AMPRI), Hoshangabad Road, Bhopal, Madhya Pradesh, 462026, India
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Woroszyło M, Ciecholewska-Juśko D, Junka A, Drozd R, Wardach M, Migdał P, Szymczyk-Ziółkowska P, Styburski D, Fijałkowski K. Rotating Magnetic Field Increases β-Lactam Antibiotic Susceptibility of Methicillin-Resistant Staphylococcus aureus Strains. Int J Mol Sci 2021; 22:ijms222212397. [PMID: 34830278 PMCID: PMC8618647 DOI: 10.3390/ijms222212397] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/12/2021] [Accepted: 11/15/2021] [Indexed: 11/16/2022] Open
Abstract
Methicillin-resistant strains of Staphylococcus aureus (MRSA) have developed resistance to most β-lactam antibiotics and have become a global health issue. In this work, we analyzed the impact of a rotating magnetic field (RMF) of well-defined and strictly controlled characteristics coupled with β-lactam antibiotics against a total of 28 methicillin-resistant and sensitive S. aureus strains. The results indicate that the application of RMF combined with β-lactam antibiotics correlated with favorable changes in growth inhibition zones or in minimal inhibitory concentrations of the antibiotics compared to controls unexposed to RMF. Fluorescence microscopy indicated a drop in the relative number of cells with intact cell walls after exposure to RMF. These findings were additionally supported by the use of SEM and TEM microscopy, which revealed morphological alterations of RMF-exposed cells manifested by change of shape, drop in cell wall density and cytoplasm condensation. The obtained results indicate that the originally limited impact of β-lactam antibiotics in MRSA is boosted by the disturbances caused by RMF in the bacterial cell walls. Taking into account the high clinical need for new therapeutic options, effective against MRSA, the data presented in this study have high developmental potential and could serve as a basis for new treatment options for MRSA infections.
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Affiliation(s)
- Marta Woroszyło
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland; (M.W.); (D.C.-J.); (R.D.)
| | - Daria Ciecholewska-Juśko
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland; (M.W.); (D.C.-J.); (R.D.)
| | - Adam Junka
- Department of Pharmaceutical Microbiology and Parasitology, Faculty of Pharmacy, Medical University of Wroclaw, Borowska 211a, 50-534 Wrocław, Poland
- Laboratory of Microbiology, Łukasiewicz Research Network–PORT Polish Center for Technology Development, 54-066 Wrocław, Poland
- Correspondence: (A.J.); (K.F.); Tel.: +48-88-922-93-41 (A.J.); +48-91-449-6714 (K.F.)
| | - Radosław Drozd
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland; (M.W.); (D.C.-J.); (R.D.)
| | - Marcin Wardach
- Faculty of Electrical Engineering, West Pomeranian University of Technology in Szczecin, Sikorskiego 37, 70-313 Szczecin, Poland;
| | - Paweł Migdał
- Department of Environment, Hygiene and Animal Welfare, Faculty of Biology and Animal Science, Wroclaw University of Environmental and Life Sciences, Chełmońskiego 38C, 51-630 Wrocław, Poland;
| | - Patrycja Szymczyk-Ziółkowska
- Centre for Advanced Manufacturing Technologies (CAMT/FPC), Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Łukasiewicza 5, 50-371 Wrocław, Poland;
| | - Daniel Styburski
- Laboratory of Chromatography and Mass Spectroscopy, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Klemensa Janickiego 29, 71-270 Szczecin, Poland;
| | - Karol Fijałkowski
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland; (M.W.); (D.C.-J.); (R.D.)
- Correspondence: (A.J.); (K.F.); Tel.: +48-88-922-93-41 (A.J.); +48-91-449-6714 (K.F.)
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18
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Woroszyło M, Ciecholewska-Juśko D, Junka A, Pruss A, Kwiatkowski P, Wardach M, Fijałkowski K. The Impact of Intraspecies Variability on Growth Rate and Cellular Metabolic Activity of Bacteria Exposed to Rotating Magnetic Field. Pathogens 2021; 10:1427. [PMID: 34832583 PMCID: PMC8624435 DOI: 10.3390/pathogens10111427] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 10/27/2021] [Accepted: 10/29/2021] [Indexed: 12/02/2022] Open
Abstract
Majority of research on the influence of magnetic fields on microorganisms has been carried out with the use of different species or different groups of microorganisms, but not with the use of different strains belonging to one species. The purpose of the present study was to assess the effect of rotating magnetic fields (RMF) of 5 and 50 Hz on the growth and cellular metabolic activity of eight species of bacteria: Staphylococcus aureus, Pseudomonas aeruginosa, Proteus mirabilis, Klebsiella pneumoniae, Enterococcus faecalis, Enterobacter cloacae, Moraxella catarrhalis, and Bacillus cereus. However, contrary to the research conducted so far, each species was represented by at least four different strains. Moreover, an additional group of S. aureus belonging to a single clonal type but representing different biotypes was also included in the experiment. The results showed a varied influence of RMF on growth dynamics and cellular metabolic activity, diversified to the greatest extent in dependence on the bacterial strain exposed to the RMF and to a lesser extent in dependence on the frequency of the generated magnetic field. It was found that, with regard to the exposed strain of the same species, the effect exerted by the RMF may be positive (i.e., manifests as the increase in the growth rate or/and cellular metabolic activity) or negative (i.e., manifests as a reduction of both aforementioned features) or none. Even when one clonal type of S. aureus was used, the results of RMF exposure also varied (although the degree of differentiation was lower than for strains representing different clones). Therefore, the research has proven that, apart from the previously described factors related primarily to the physical parameters of the magnetic field, one of the key parameters affecting the final result of its influence is the bacterial intraspecies variability.
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Affiliation(s)
- Marta Woroszyło
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland; (M.W.); (D.C.-J.)
| | - Daria Ciecholewska-Juśko
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland; (M.W.); (D.C.-J.)
| | - Adam Junka
- Department of Pharmaceutical Microbiology and Parasitology, Faculty of Pharmacy, Medical University of Wroclaw, Borowska 211a, 50-534 Wrocław, Poland
- Laboratory of Microbiology, Łukasiewicz Research Network-PORT Polish Center for Technology Development, 54-066 Wrocław, Poland
| | - Agata Pruss
- Department of Laboratory Medicine, Pomeranian Medical University in Szczecin, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland;
| | - Paweł Kwiatkowski
- Department of Diagnostic Immunology, Pomeranian Medical University in Szczecin, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland;
| | - Marcin Wardach
- Faculty of Electrical Engineering, West Pomeranian University of Technology in Szczecin, Sikorskiego 37, 70-313 Szczecin, Poland;
| | - Karol Fijałkowski
- Department of Microbiology and Biotechnology, Faculty of Biotechnology and Animal Husbandry, West Pomeranian University of Technology in Szczecin, Piastów 45, 70-311 Szczecin, Poland; (M.W.); (D.C.-J.)
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Said-Salman I, Yassine W, Rammal A, Hneino M, Yusef H, Moustafa M. Effects of Wi-Fi Radiofrequency Radiation on Carbapenem-Resistant Klebsiella pneumoniae. Bioelectromagnetics 2021; 42:575-582. [PMID: 34337771 DOI: 10.1002/bem.22364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 06/23/2021] [Accepted: 07/21/2021] [Indexed: 11/09/2022]
Abstract
The hazardous consequences of electromagnetic field (EMF) exposure represent a public health concern. Common sources of EMF include smartphones and wireless fidelity (Wi-Fi). The aim of our study is to assess whether exposure to Wi-Fi radiofrequency radiation influences the pathogenic traits of carbapenem-resistant Klebsiella pneumoniae. The susceptibility to antibiotics was evaluated by the determination of minimum inhibitory concentrations (MIC). In this study, K. pneumoniae showed a non-linear response to treatments with Colistin and Gentamycin following different Wi-Fi exposure periods. Transmission electron microscopy revealed morphological changes in the bacterial cell membrane within 24 h of Wi-Fi exposure. Crystal violet quantification and quantitative real-time polymerase chain reaction showed that the ability to form biofilms was greater in Wi-Fi exposed K. pnemoniae when compared to control. Moreover, higher levels of bcsA, mrkA, and luxS messenger RNAs were observed. Our data suggest that Wi-Fi exposure can influence bacteria in a stressful way, leading to an alteration in their antibiotic susceptibility, morphological changes, and cumulative biofilm formation. © 2021 Bioelectromagnetics Society.
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Affiliation(s)
- Ilham Said-Salman
- Department of Biochemistry, Faculty of Science, Lebanese University, Hadath, Lebanon.,Department of Biological Sciences, Faculty of Science, Beirut Arab University, Debiyeh, Lebanon
| | - Wissam Yassine
- Department of Biochemistry, Faculty of Science, Lebanese University, Hadath, Lebanon
| | - Ali Rammal
- Department of Medicine, Faculty of Medicine, University Saint Joseph, Beyrouth, Lebanon
| | - Mohammad Hneino
- Department of Laboratory Sciences, Faculty of Health, Lebanese University, Hadath, Lebanon
| | - Hoda Yusef
- Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Mohamed Moustafa
- Department of Biochemistry, Faculty of Science, Alexandria University, Alexandria, Egypt
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Farber PL, Isoldi FC, Ferreira LM. Electric Factors in Wound Healing. Adv Wound Care (New Rochelle) 2021; 10:461-476. [PMID: 32870772 DOI: 10.1089/wound.2019.1114] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Significance: Electric factors such as electric charges, electrodynamic field, skin battery, and interstitial exclusion permeate wound healing physiology and physiopathology from injury to re-epithelialization. The understanding of how electric factors contribute to wound healing and how treatments may interfere with them is fundamental for the development of better strategies for the management of pathological scarring and chronic wounds. Recent Advances: Angiogenesis, cell migration, macrophage activation hemorheology, and microcirculation can interfere and be interfered with electric factors. New treatments with various types of electric currents, laser, light emitting diode, acupuncture, and weak electric fields applied directly on the wound have been developed to improve wound healing. Critical Issues: Despite the basic and clinical development, pathological scars such as keloids and chronic wounds are still a challenge. Future Directions: New treatments can be developed to improve skin wound healing taking into account the influence of electrical charges. Monitoring electrical activity during skin healing and the influence of treatments on hemorheology and microcirculation are examples of how to use knowledge of electrical factors to increase their effectiveness.
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Affiliation(s)
| | - Felipe Contoli Isoldi
- Surgery Department, Plastic Surgery Division, Postgraduated Program in Translational Surgery, Universidade Federal de São Paulo (Unifesp), São Paulo, Brazil
| | - Lydia Masako Ferreira
- Surgery Department, Plastic Surgery Division, Postgraduated Program in Translational Surgery, Universidade Federal de São Paulo (Unifesp), São Paulo, Brazil
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Madinehei M, Kuester S, Kaydanova T, Moghimian N, David É. Influence of Graphene Nanoplatelet Lateral Size on the Electrical Conductivity and Electromagnetic Interference Shielding Performance of Polyester Nanocomposites. Polymers (Basel) 2021; 13:polym13152567. [PMID: 34372170 PMCID: PMC8347779 DOI: 10.3390/polym13152567] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 07/16/2021] [Accepted: 07/28/2021] [Indexed: 11/16/2022] Open
Abstract
Polyester nanocomposites reinforced with graphene nanoplatelets (GnPs) with two different lateral sizes are prepared by high shear mixing, followed by compression molding. The effects of the size and concentration of GnP, as well as of the processing method, on the electrical conductivity and electromagnetic interference (EMI) shielding behavior of these nanocomposites are experimentally investigated. The in-plane electrical conductivity of the nanocomposites with larger-size GnPs is approximately one order of magnitude higher than the cross-plane volume conductivity. According to the SEM images, the compression-induced alignments of GnPs is found to be responsible for this anisotropic behavior. The orientation of the small size GnPs in the composite is not influenced by the compression process as strongly, and consequently, the electrical conductivity of these nanocomposites exhibits only a slight anisotropy. The maximum EMI shielding effectiveness (SE) of 27 dB (reduction of 99.8% of the incident radiation) is achieved at 25 wt.% of the smaller-size GnP loading. Experimental results show that the EMI shielding mechanism of these composites has a strong dependency on the lateral dimension of GnPs. The non-aligned smaller-size GnPs are leveraged to obtain a relatively high absorption coefficient (≈40%). This absorption coefficient is superior to the existing single-filler bulk polymer composite with a similar thickness.
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Affiliation(s)
- Milad Madinehei
- Mechanical Engineering Department, École de Technologie Supérieure, 1100 Notre-Dame St W, Montréal, QC H3C 1K3, Canada;
| | - Scheyla Kuester
- NanoXplore Inc., 4500 Boulevard Thimens, Saint-Laurent, QC H4R 2P2, Canada; (S.K.); (T.K.); (N.M.)
| | - Tatiana Kaydanova
- NanoXplore Inc., 4500 Boulevard Thimens, Saint-Laurent, QC H4R 2P2, Canada; (S.K.); (T.K.); (N.M.)
| | - Nima Moghimian
- NanoXplore Inc., 4500 Boulevard Thimens, Saint-Laurent, QC H4R 2P2, Canada; (S.K.); (T.K.); (N.M.)
| | - Éric David
- Mechanical Engineering Department, École de Technologie Supérieure, 1100 Notre-Dame St W, Montréal, QC H3C 1K3, Canada;
- Correspondence:
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22
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Xia Z, Li M, Tian Y, Li Y, Li B, Zhang G, Lv J, Fu Q, Zhou H, Dong J. Lipidomics of Serum and Hippocampus Reveal the Protective Effects of Fermented Soybean Lipid on Rats of Microwave-Induced Cognitive Damage. ACS Chem Neurosci 2021; 12:2122-2132. [PMID: 34085811 DOI: 10.1021/acschemneuro.1c00042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Fermented soybean lipids (FSE-C) is an extract enriched in active lipid classes. To explore whether FSE-C can alleviate cognitive damage triggered by the exposure to microwave radiation through regulating lipid metabolism, we employed lipidomic profiling based on a UPLC-MS to investigate differential lipid metabolites in the serum and hippocampus of rats. The results showed that orally administered FSE-C could protect from cognitive damage in microwave-induced rats. Serum lipidomics indicated that FSE-C effectively facilitated the recovery of 43 differential lipid metabolites including 6 phosphatidylcholines (PCs), 5 phosphatidylethanolamines (PEs), 1 phosphatidylinositol, 3 lysophosphatidylcholines (LPCs), 6 lysophosphatidylethanolamines (LPEs), and 22 triglycerides (TGs), which was consistent with the analysis of serum TG levels. Moreover, FSE-C positively coordinated hexacosanoic acid, 2 PCs, 4 sphingomyelins (SMs), and 11 TGs, through the hippocampal lipidomics. Collectively, these findings suggested that phospholipid and TG metabolisms were significantly modified in microwave-exposed rats. TGs may be regarded as potential biomarkers to further investigate and evaluate the roles and functions of FSE-C on the attenuation of cognitive damage induced by microwave radiation.
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Affiliation(s)
- Ziming Xia
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Min Li
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Ying Tian
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Yongzhong Li
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Bin Li
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Guangjie Zhang
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Jinpeng Lv
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Qianyu Fu
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Hongmei Zhou
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Junxing Dong
- Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
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23
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Migdał P, Murawska A, Bieńkowski P, Berbeć E, Roman A. Changes in Honeybee Behavior Parameters under the Influence of the E-Field at 50 Hz and Variable Intensity. Animals (Basel) 2021; 11:ani11020247. [PMID: 33498413 PMCID: PMC7909437 DOI: 10.3390/ani11020247] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 01/13/2021] [Accepted: 01/18/2021] [Indexed: 12/27/2022] Open
Abstract
EM-fields come from both natural and anthropogenic sources. This study aimed to investigate changes in honeybee behavior parameters under the influence of an electric field at 50 Hz and variable intensity. Bees were exposed for 1 h, 3 h, or 6 h to the following artificial E-field intensities: 5.0 kV/m, 11.5 kV/m, 23.0 kV/m, or 34.5 kV/m. Bees in the control group were under the influence of an E-field <2.0 kV/m. Six basic behaviors were selected for bee observation (walking, grooming, flight, stillness, contact between individuals, and wing movement). Our research shows the impact of bee exposure time on behavioral change within groups. Exposure for 3 h caused a decrease in the time that bees spent on behaviors and in the number of occurrences. After 6 h, the parameters increased within the groups, as was the case with 1 h exposure. This may indicate that there is a behavioral barrier that allows the pattern to normalize for some time.
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Affiliation(s)
- Paweł Migdał
- Department of Environment Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, 25 C.K. Norwida St., 51-630 Wroclaw, Poland; (A.M.); (E.B.); (A.R.)
- Correspondence: ; Tel.: +48-71-3205864
| | - Agnieszka Murawska
- Department of Environment Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, 25 C.K. Norwida St., 51-630 Wroclaw, Poland; (A.M.); (E.B.); (A.R.)
| | - Paweł Bieńkowski
- Telecommunications and Teleinformatics Department, Wroclaw University of Science and Technology, 27 Wybrzeze, Wyspianskiego St., 50-370 Wroclaw, Poland;
| | - Ewelina Berbeć
- Department of Environment Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, 25 C.K. Norwida St., 51-630 Wroclaw, Poland; (A.M.); (E.B.); (A.R.)
| | - Adam Roman
- Department of Environment Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, 25 C.K. Norwida St., 51-630 Wroclaw, Poland; (A.M.); (E.B.); (A.R.)
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Kamkar M, Ghaffarkhah A, Hosseini E, Amini M, Ghaderi S, Arjmand M. Multilayer polymeric nanocomposites for electromagnetic interference shielding: fabrication, mechanisms, and prospects. NEW J CHEM 2021. [DOI: 10.1039/d1nj04626h] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Fabrication of multilayer EMI shield opens a creative avenue for designing and constructing flexible nanocomposite films simultaneously featuring excellent EMI shielding performance, fascinating heat removal ability, and robust mechanical properties.
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Affiliation(s)
- Milad Kamkar
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Ahmadreza Ghaffarkhah
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Ehsan Hosseini
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Majed Amini
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Saeed Ghaderi
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Mohammad Arjmand
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
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25
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Korenevskiy NA, Al-Kasasbeh RT, Shaqadan A, Eltous Y, Alshamasin MS, Myasoedova MA, Rodionova SN, Ilyash M. Prediction of Occupational Diseases Due to Exposure to High Radiation Electromagnetic Environment Using a Fuzzy Logic Model. Crit Rev Biomed Eng 2021; 49:41-55. [PMID: 35993950 DOI: 10.1615/critrevbiomedeng.2022043586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Several researchers studied the health impacts of electromagnetic fields in work environment. However, the previous research focuses on the statistical analysis of past exposure. There are no studies that addressed prediction of health symptoms. Prediction and early diagnosis of occupational diseases of electric power workers with acceptable accuracy is needed. The objective of this study is to develop a data driven mathematical model for predicting and diagnosis of occupational diseases in workers in electric power industry. The complex nature of disease occurrence due to electromagnetic radiation is appropriate for the fuzzy rules set by medical experts which are analyzed and validated to produce hybrid fuzzy decision rules. The selected group of medical experts suggested using hormonal disorders, endocrine diseases, coffee abuse, chronic diseases of the internal organs, allergic diseases, cervical osteochondrosis, severe course of infectious diseases, intoxication, injury. The developed hybrid fuzzy logic model predicts high risk of developing nervous system diseases. The prediction accuracy exceeded 0.88, which is acceptable for supporting tool.
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Affiliation(s)
| | - Riad Taha Al-Kasasbeh
- Department of Electrical Engineering, Faculty of Engineering Technology, Al-Balqa Applied University, Amman, Jordan
| | | | - Yousif Eltous
- Department of Electrical Engineering, Faculty of Engineering Technology, Al-Balqa Applied University, Amman, Jordan
| | - Mahdi Salman Alshamasin
- Mechatronics Department, Faculty of Engineering Technology, Al-Balqa Applied University, Amman, Jordan
| | | | | | - Maksim Ilyash
- ITMO University Kronverksky, St. Petersburg 197101, Russia
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26
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Shahzad F, Iqbal A, Kim H, Koo CM. 2D Transition Metal Carbides (MXenes): Applications as an Electrically Conducting Material. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002159. [PMID: 33146936 DOI: 10.1002/adma.202002159] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 06/30/2020] [Indexed: 05/25/2023]
Abstract
Since their discovery in 2011, 2D transition metal carbides, nitrides, and carbonitrides, known as MXenes, have attracted considerable global research interest owing to their outstanding electrical conductivity coupled with light weight, flexibility, transparency, surface chemistry tunability, and easy solution processability. Here, the promising abilities of 2D MXenes, from both experimental and theoretical perspectives, for designing conductive materials for a range of applications, including electromagnetic interference shielding, flexible optoelectronics, sensors, and thermal heaters, are presented.
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Affiliation(s)
- Faisal Shahzad
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
- National Center for Nanotechnology, Department of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, 45650, Pakistan
| | - Aamir Iqbal
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
- Nanomaterials Science and Engineering, University of Science and Technology, 217 Gajungro, 176 Gajung-dong, Yuseong-gu, Daejeon, 34113, Republic of Korea
| | - Hyerim Kim
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Anam-ro 145, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Chong Min Koo
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
- Nanomaterials Science and Engineering, University of Science and Technology, 217 Gajungro, 176 Gajung-dong, Yuseong-gu, Daejeon, 34113, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Anam-ro 145, Seongbuk-gu, Seoul, 02841, Republic of Korea
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27
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Surface modification of MWCNT with cluster form of Fe2O3/Fe3O4 NPs for improving their microwave absorption performance. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137823] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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28
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Lola Costa EV, Silva Araújo VFD, Pereira Santos AP, de Albuquerque Nogueira R. Morphometric evaluation of Japanese quail embryos and their extraembryonic vascular networks exposed to low-frequency magnetic field with two different intensities. Electromagn Biol Med 2020; 39:403-410. [PMID: 32954862 DOI: 10.1080/15368378.2020.1821708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Animals developed or in an embryonic stage, are constantly subjected to magnetic pollution generated by electrical and electronic devices. Several researches have used the bird embryo as an experimental model to evaluate the action of magnetic field (MF) and electromagnetic field (EMF). This study proposed to perform a morphometric evaluation in the embryos and in the blood vascular network of the yolk sac membranes (YSM) of Japanese quail (Coturnix japonica) exposed to the 60 Hz MF with two different intensities (0.16 and 0.65 mT). A total of 30 eggs were used, 10 eggs were used for each assay. Each assay formed a group (control group, group submitted to the MF of 0.16 mT and 0.65 mT). The images of the skeletonized vascular network of YSM were evaluated by two methods of fractal dimension: box-counting dimension (Dbc) and information dimension (Dinf). The embryos were evaluated by body mass, percentage cephalic length and body area. The fractal dimensions revealed no difference among groups. There were no significant differences in relation to embryonic body mass among groups. However, the embryos exposed to 0.65 mT MF presented a smaller embryonic body development (body area and percentage cephalic length). In conclusion, 0.16 mT and 0.65 mT magnetic fields were not able to generate significant effects on vasculogenesis and angiogenesis. However, the embryos exposed to 6 h of magnetic field with 0.65 mT intensity and 60 Hz frequency showed a decrease in embryonic body development.
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Affiliation(s)
- Edbhergue Ventura Lola Costa
- Laboratory of Theoretical-Experimental and Computational Biophysics, Rural Federal University of Pernambuco (UFRPE) , Recife, Brazil
| | - Victor Felipe da Silva Araújo
- Laboratory of Theoretical-Experimental and Computational Biophysics, Rural Federal University of Pernambuco (UFRPE) , Recife, Brazil
| | | | - Romildo de Albuquerque Nogueira
- Laboratory of Theoretical-Experimental and Computational Biophysics, Rural Federal University of Pernambuco (UFRPE) , Recife, Brazil
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29
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Electromagnetic Interference Shield of Highly Thermal-Conducting, Light-Weight, and Flexible Electrospun Nylon 66 Nanofiber-Silver Multi-Layer Film. Polymers (Basel) 2020; 12:polym12081805. [PMID: 32796775 PMCID: PMC7465716 DOI: 10.3390/polym12081805] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 07/30/2020] [Accepted: 08/10/2020] [Indexed: 12/23/2022] Open
Abstract
A light-weight, flexible electromagnetic interference (EMI) shield was prepared by creating a layer-structured metal-polymer composite film consisting of electrospun nylon 66 nanofibers with silver films. The EMI shielding effectiveness (SE), specific SE, and absolute SE of the composite were as high as 60.6 dB, 67.9 dB cm3/g, and 6792 dB cm2/g in the X- and Ku-bands, respectively. Numerical and analytical calculations suggest that the energy of EM waves is predominantly absorbed by inter-layer multiple reflections. Because the absorbed EM energy is dissipated as heat, the thermal conductivity of absorption-dominant EMI shields is highly significant. Measured thermal conductivity of the composite was found to be 4.17 Wm−1K−1 at room temperature, which is higher than that of bulk nylon 66 by a factor of 16.7. The morphology and crystallinity of the composite were examined using scanning electron microscopy and differential scanning calorimetry, respectively. The enhancement of thermal conductivity was attributed to an increase in crystallinity of the nanofibers, which occurred during the electrospinning and subsequent hot pressing, and to the high thermal conductivity of the deposited silver films. The contribution of each fabrication process to the increase in thermal conductivity was investigated by measuring the thermal conductivity values after each fabrication process.
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30
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Correlation of Blood Oxidative Stress Parameters to Indoor Radiofrequency Radiation: A Cross Sectional Study in Jordan. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17134673. [PMID: 32610554 PMCID: PMC7369753 DOI: 10.3390/ijerph17134673] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/03/2020] [Accepted: 06/10/2020] [Indexed: 12/12/2022]
Abstract
Background: Electromagnetic pollution is a general health concern worldwide, as cell phone towers are ubiquitous and are located adjacent to or on the roof of schools, and hospitals. However, the health risks are still inconclusive. This cross-sectional study evaluated the potential effect of electromagnetic radiation generated from various resources including cell phone towers on blood glutathione S transferase activity (e-GST) and total antioxidant activity of the Jordanian population. Methods: The power density of three districts in the city of Irbid, Jordan was mapped to generate “outside the houses” and “inside the houses” maps. The effect of categorical variables (gender, using a cell phone, presence of Wi-Fi modem, previous exposure to medical imaging) and continuous variables (distance from the base station, the elevation of the house, the duration of stay in the house, power density outside houses, power density inside houses) on e-GST and total antioxidant activity were investigated. Results: The EMR generated outside the houses—including cell phone towers—did not reach inside the houses at the same power and had no significant influence on e-GST activity. The EMR inside the house, which primarily came from internal resources, has a significant effect on e-GST activity. The duration of stay inside the house, the use of cell phones, and the presence of a Wi-Fi modem had a proportional effect on e-GST activity. The total antioxidant activity was statistically equal between the tested and control groups. Conclusions: Several factors such as building materials restricted the penetration of EMR reaching inside the houses. EMR generated inside rather than outside the houses had a proportional effect on e-GST. The differences in e-GST were compensated successfully by other antioxidant mechanisms. Further research is needed to identify other possible sources of antioxidants, and to evaluate long-term effects and genetic polymorphism.
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31
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Bieszke B, Namiotko L, Namiotko T. Life history traits of a temporary water ostracod Heterocypris incongruens (Crustacea, Ostracoda) are affected by power frequency (50 Hz) electromagnetic environmental pollution. THE EUROPEAN ZOOLOGICAL JOURNAL 2020. [DOI: 10.1080/24750263.2020.1736654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- B. Bieszke
- Laboratory of Biosystematics and Ecology of Aquatic Invertebrates, Department of Genetics and Biosystematics, Faculty of Biology, University of Gdansk, Gdansk, Poland
| | - L. Namiotko
- Laboratory of Biosystematics and Ecology of Aquatic Invertebrates, Department of Genetics and Biosystematics, Faculty of Biology, University of Gdansk, Gdansk, Poland
| | - T. Namiotko
- Laboratory of Biosystematics and Ecology of Aquatic Invertebrates, Department of Genetics and Biosystematics, Faculty of Biology, University of Gdansk, Gdansk, Poland
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32
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Ślosarczyk A, Klapiszewski Ł, Buchwald T, Krawczyk P, Kolanowski Ł, Lota G. Carbon Fiber and Nickel Coated Carbon Fiber-Silica Aerogel Nanocomposite as Low-Frequency Microwave Absorbing Materials. MATERIALS 2020; 13:ma13020400. [PMID: 31952264 PMCID: PMC7014024 DOI: 10.3390/ma13020400] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 01/08/2020] [Accepted: 01/09/2020] [Indexed: 11/18/2022]
Abstract
Silica aerogel-based materials exhibit a great potential for application in many industrial applications due to their unique porous structure. In the framework of this study, carbon fiber and nickel coated carbon fiber–silica aerogel nanocomposites were proposed as effective electromagnetic shielding material. Herein, the initial oxidation of the surface of carbon fibers allowed the deposition of a durable Ni metallic nanolayer. The fibers prepared in this way were then introduced into a silica aerogel structure, which resulted in obtaining two nanocomposites that differed in terms of fiber volume content (10% and 15%). In addition, analogous systems containing fibers without a metallic nanolayer were studied. The conducted research indicated that carbon fibers with a Ni nanolayer present in the silica aerogel structure negatively affected the structural properties of the composite, but were characterized by two-times higher electrical conductivity of the composite. This was because the nickel nanolayer effectively blocked the binding of the fiber surface to the silica skeleton, which resulted in an increase of the density of the composite and a reduction in the specific surface area. The thermal stability of the material also deteriorated. Nevertheless, a very high electromagnetic radiation absorption capacity between 40 and 56 dB in the frequency range from 8 to 18 GHz was obtained.
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Affiliation(s)
- Agnieszka Ślosarczyk
- Institute of Building Engineering, Faculty of Civil and Transport Engineering, Poznan University of Technology, Piotrowo 3, PL-60965 Poznan, Poland
- Correspondence: ; Tel.: +48-61-665-21-66
| | - Łukasz Klapiszewski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland;
| | - Tomasz Buchwald
- Institute of Materials Research and Quantum Engineering, Faculty of Materials Engineering and Technical Physics, Poznan University of Technology, Piotrowo 3, PL-60965 Poznan, Poland;
| | - Piotr Krawczyk
- Institute of Chemistry and Technical Electrochemistry, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland; (P.K.); (Ł.K.); (G.L.)
| | - Łukasz Kolanowski
- Institute of Chemistry and Technical Electrochemistry, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland; (P.K.); (Ł.K.); (G.L.)
| | - Grzegorz Lota
- Institute of Chemistry and Technical Electrochemistry, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland; (P.K.); (Ł.K.); (G.L.)
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33
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Tian Y, Xia Z, Li M, Zhang G, Cui H, Li B, Zhou H, Dong J. The relationship between microwave radiation injury and abnormal lipid metabolism. Chem Phys Lipids 2019; 225:104802. [DOI: 10.1016/j.chemphyslip.2019.104802] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/03/2019] [Accepted: 07/28/2019] [Indexed: 02/06/2023]
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34
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Galli C, Pedrazzi G, Guizzardi S. The cellular effects of Pulsed Electromagnetic Fields on osteoblasts: A review. Bioelectromagnetics 2019; 40:211-233. [PMID: 30908726 DOI: 10.1002/bem.22187] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 03/08/2019] [Indexed: 12/12/2022]
Abstract
Electromagnetic fields (EMFs) have long been known to interact with living organisms and their cells and to bear the potential for therapeutic use. Among the most extensively investigated applications, the use of Pulsed EMFs (PEMFs) has proven effective to ameliorate bone healing in several studies, although the evidence is still inconclusive. This is due in part to our still-poor understanding of the mechanisms by which PEMFs act on cells and affect their functions and to an ongoing lack of consensus on the most effective parameters for specific clinical applications. The present review has compared in vitro studies on PEMFs on different osteoblast models, which elucidate potential mechanisms of action for PEMFs, up to the most recent insights into the role of primary cilia, and highlight the critical issues underlying at least some of the inconsistent results in the available literature. Bioelectromagnetics. 2019;9999:XX-XX. © 2019 Bioelectromagnetics Society.
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Affiliation(s)
- Carlo Galli
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Giuseppe Pedrazzi
- Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Stefano Guizzardi
- Department of Medicine and Surgery, University of Parma, Parma, Italy
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35
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Perera PGT, Nguyen THP, Dekiwadia C, Wandiyanto JV, Sbarski I, Bazaka O, Bazaka K, Crawford RJ, Croft RJ, Ivanova EP. Exposure to high-frequency electromagnetic field triggers rapid uptake of large nanosphere clusters by pheochromocytoma cells. Int J Nanomedicine 2018; 13:8429-8442. [PMID: 30587969 PMCID: PMC6294056 DOI: 10.2147/ijn.s183767] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Background Effects of man-made electromagnetic fields (EMF) on living organisms potentially include transient and permanent changes in cell behaviour, physiology and morphology. At present, these EMF-induced effects are poorly defined, yet their understanding may provide important insights into consequences of uncontrolled (e.g., environmental) as well as intentional (e.g., therapeutic or diagnostic) exposure of biota to EMFs. In this work, for the first time, we study mechanisms by which a high frequency (18 GHz) EMF radiation affects the physiology of membrane transport in pheochromocytoma PC 12, a convenient model system for neurotoxicological and membrane transport studies. Methods and results Suspensions of the PC 12 cells were subjected to three consecutive cycles of 30s EMF treatment with a specific absorption rate (SAR) of 1.17 kW kg-1, with cells cooled between exposures to reduce bulk dielectric heating. The EMF exposure resulted in a transient increase in membrane permeability for 9 min in up to 90 % of the treated cells, as demonstrated by rapid internalisation of silica nanospheres (diameter d ≈ 23.5 nm) and their clusters (d ≈ 63 nm). In contrast, the PC 12 cells that received an equivalent bulk heat treatment behaved similar to the untreated controls, showing lack to minimal nanosphere uptake of approximately 1-2 %. Morphology and growth of the EMF treated cells were not altered, indicating that the PC 12 cells were able to remain viable after the EMF exposure. The metabolic activity of EMF treated PC 12 cells was similar to that of the heat treated and control samples, with no difference in the total protein concentration and lactate dehydrogenase (LDH) release between these groups. Conclusion These results provide new insights into the mechanisms of EMF-induced biological activity in mammalian cells, suggesting a possible use of EMFs to facilitate efficient transport of biomolecules, dyes and tracers, and genetic material across cell membrane in drug delivery and gene therapy, where permanent permeabilisation or cell death is undesirable.
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Affiliation(s)
- Palalle G Tharushi Perera
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC, Australia
| | | | - Chaitali Dekiwadia
- RMIT Microscopy and Microanalysis Facility, College of Science, Engineering and Health, RMIT University, Melbourne, VIC, Australia
| | - Jason V Wandiyanto
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC, Australia
| | - Igor Sbarski
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC, Australia
| | - Olga Bazaka
- School of Science, RMIT University, Melbourne, VIC, Australia,
| | - Kateryna Bazaka
- School of Chemistry, Physics, Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, Australia
| | | | - Rodney J Croft
- School of Psychology, Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
| | - Elena P Ivanova
- School of Science, RMIT University, Melbourne, VIC, Australia,
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de Santana SL, Verçosa CJ, de Araújo Castro ÍF, de Amorim ÉM, da Silva AS, da Rocha Bastos TM, da Silva Neto LJ, Dos Santos TO, De França EJ, Rohde C. Drosophila melanogaster as model organism for monitoring and analyzing genotoxicity associated with city air pollution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:32409-32417. [PMID: 30229497 DOI: 10.1007/s11356-018-3186-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 09/10/2018] [Indexed: 06/08/2023]
Abstract
This study evaluated the genotoxic potential of atmospheric pollution associated with urbanization using the model organism Drosophila melanogaster and the Comet assay with hemolymph cells. Larvae were exposed to atmospheric compounds in an urban and a rural area in the municipality of Vitória de Santo Antão, Pernambuco, Brazil, for 6 days (from the embryo stage to the third larval stage) in April 2015 and April 2017. The results were compared to a negative environmental control group exposed to a preserved area (Catimbau National Park) and to a negative control exposed to the laboratory room conditions. The Comet assay demonstrated significant genetic damage in the organisms exposed to the urban area compared with those exposed to the rural area and negative control groups. The evidences were supported by particulate matter analysis showing higher photopeaks of chemical elements such as aluminum, silicon, sulfur, potassium, calcium, titanium, and iron, associated to road dust fraction in urban environment. Once again, the results confirm D. melanogaster an ideal bioindicator organism to monitor genotoxic hazard associated with atmospheric pollution.
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Affiliation(s)
- Samuel Lima de Santana
- Programa de Pós-Graduação em Saúde Humana e Meio Ambiente, Centro Acadêmico de Vitória (CAV), Universidade Federal de Pernambuco (UFPE), Vitória de Santo Antão, Pernambuco, Brazil
- Laboratório de Genética, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Rua do Alto do Reservatório s/n, Bairro Bela Vista, Vitória de Santo Antão, Pernambuco, CEP 51608-680, Brazil
| | - Cícero Jorge Verçosa
- Laboratório de Genética, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Rua do Alto do Reservatório s/n, Bairro Bela Vista, Vitória de Santo Antão, Pernambuco, CEP 51608-680, Brazil
| | - Ícaro Fillipe de Araújo Castro
- Laboratório de Genética, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Rua do Alto do Reservatório s/n, Bairro Bela Vista, Vitória de Santo Antão, Pernambuco, CEP 51608-680, Brazil
| | - Érima Maria de Amorim
- Laboratório de Genética, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Rua do Alto do Reservatório s/n, Bairro Bela Vista, Vitória de Santo Antão, Pernambuco, CEP 51608-680, Brazil
| | - André Severino da Silva
- Laboratório de Genética, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Rua do Alto do Reservatório s/n, Bairro Bela Vista, Vitória de Santo Antão, Pernambuco, CEP 51608-680, Brazil
| | - Thiago Moura da Rocha Bastos
- Centro Regional de Ciências Nucleares do Nordeste (CRCN-NE), Av. Prof. Luiz Freire, 200, Bairro Cidade Universitária, Recife, CEP 50740-545, Pernambuco, Brazil
| | - Luiz Joaquim da Silva Neto
- Centro Regional de Ciências Nucleares do Nordeste (CRCN-NE), Av. Prof. Luiz Freire, 200, Bairro Cidade Universitária, Recife, CEP 50740-545, Pernambuco, Brazil
| | - Thiago Oliveira Dos Santos
- Centro Regional de Ciências Nucleares do Nordeste (CRCN-NE), Av. Prof. Luiz Freire, 200, Bairro Cidade Universitária, Recife, CEP 50740-545, Pernambuco, Brazil
| | - Elvis Joacir De França
- Centro Regional de Ciências Nucleares do Nordeste (CRCN-NE), Av. Prof. Luiz Freire, 200, Bairro Cidade Universitária, Recife, CEP 50740-545, Pernambuco, Brazil
| | - Claudia Rohde
- Laboratório de Genética, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco, Rua do Alto do Reservatório s/n, Bairro Bela Vista, Vitória de Santo Antão, Pernambuco, CEP 51608-680, Brazil.
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Khoshroo MMZ, Mehrjan MS, Samiee F, Soltani M, Shekarabi SPH. Some immunological responses of common carp (Cyprinus carpio) fingerling to acute extremely low-frequency electromagnetic fields (50 Hz). FISH PHYSIOLOGY AND BIOCHEMISTRY 2018; 44:235-243. [PMID: 29022155 DOI: 10.1007/s10695-017-0429-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
Increasing of anthropogenic electromagnetic fields in aquatic environments has been recently become the core of attention. In this study, the effect of extremely low-frequency electromagnetic fields (50 Hz) on immune status and metabolic markers of common carp fingerling was assessed. The fish were exposed to extremely low-frequency electromagnetic fields at four intensities of 0.1, 0.5, 1, and 2 mT only once for 2 h; then, they were reared for 60 days. Results showed that the levels of aspartate aminotransferase (AST) and alanine transaminase (ALT) and alkaline phosphatase (ALP) were increased with an increase in the electromagnetic field intensity on 15 and 60 days post exposure. A significant increase was obtained in these enzyme levels in all the tested intensities compared to the control one (p < 0.05), with a maximum value measured in 2-mT trail. Conversely, with an increasing in the electromagnetic intensity, the levels of C3, C4, and lysozyme were reduced in all the treated groups in comparison with the control group (p < 0.05). The results suggested a significant impact of electromagnetic on fish immunophysiological functions. Therefore, it is required to have serious attention in aquatic ecosystems.
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Affiliation(s)
| | - Mehdi Shamsaie Mehrjan
- Department of Fisheries Science, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Farzaneh Samiee
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Mehdi Soltani
- Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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Mahani AA, Motahari S, Nayyeri V. Electromagnetic and microwave absorption characteristics of PMMA composites filled with a nanoporous resorcinol formaldehyde based carbon aerogel. RSC Adv 2018; 8:10855-10864. [PMID: 35541517 PMCID: PMC9078940 DOI: 10.1039/c8ra00196k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 03/12/2018] [Indexed: 11/21/2022] Open
Abstract
Nanostructured carbons have opened up new perspectives in fields of electromagnetic (EM) applications. The present study aims at the processing of microwave absorbing (MA) materials based on carbon aerogels (CAs) in polymethyl methacrylate (PMMA) matrix to be used in X-band frequency. CAs were synthesized by carbonization of a sol–gel derived organic gel from resorcinol and formaldehyde as starting materials. Microwave attenuation properties of the prepared composites were investigated in terms of CAs particle size distribution (PSD) and mass fraction. To do so, the optimal PSD was initially determined by assessing the EM attenuation performance of the CAs/PMMA composites with constant mass loading (10 wt%) and differing particle sizes. Next, the EM properties of the selected CAs with the optimal particle size was measured as a function of mass fraction varying from 1 to 15 wt% in order to obtain a highly efficient CAs based MA. The results indicate that the dielectric loss of CAs composites can be enhanced by optimizing the PSD as well as the mass fraction of CAs. The effective absorption bandwidth of composites containing 10 wt% of CAs exceeded 3.7 GHz at a very thin thickness of 1.9 mm indicating that these materials present advantages as microwave absorbers. Both PSD and filler content play dominant role in tuning EM absorption performance of CAs composites.![]()
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Affiliation(s)
| | - S. Motahari
- School of Chemical Engineering
- Faculty of Engineering
- University of Tehran
- Tehran
- Iran
| | - V. Nayyeri
- Antenna and Microwave Research Laboratory
- Iran University of Science and Technology
- Tehran
- Iran
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Exposure to 2100 MHz electromagnetic field radiations induces reactive oxygen species generation in Allium cepa roots. J Microsc Ultrastruct 2017; 5:225-229. [PMID: 30023258 PMCID: PMC6025783 DOI: 10.1016/j.jmau.2017.09.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 09/04/2017] [Accepted: 09/04/2017] [Indexed: 12/12/2022] Open
Abstract
During the last few decades there has been an enormous increase in the usage of cell phones as these are one of the most convenient gadgets and provide excellent mode of communication without evoking any hindrance to movement. However, these are significantly adding to the electromagnetic field radiations (EMF-r) in the environment and thus, are required to be analysed for their impacts on living beings. The present study investigated the role of cell phone EMF-r in inciting oxidative damage in onion (Allium cepa) roots at a frequency of 2100 MHz. Onion roots were exposed to continuous wave homogenous EMF-r for 1, 2 and 4 h for single day and generation of reactive oxygen species (ROS) in terms of malondialdehyde (MDA), hydrogen peroxide (H2O2) and superoxide anion (O2•−) content and changes in the activities of antioxidant enzymes- superoxide dismutases (SOD) and catalases (CAT) were measured. The results showed that EMF-r exposure enhanced the content of MDA, H2O2 and O2•−. Also, there was an upregulation in the activity of antioxidant enzymes− SOD and CAT− in onion roots. The study concluded that 2100 MHz cell phone EMF-r incite oxidative damage in onion roots by altering the oxidative metabolism.
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Liu C, Ye X, Wang X, Liao X, Huang X, Shi B. Collagen Fiber Membrane as an Absorptive Substrate To Coat with Carbon Nanotubes-Encapsulated Metal Nanoparticles for Lightweight, Wearable, and Absorption-Dominated Shielding Membrane. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b01930] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chang Liu
- Department
of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, China
| | - Xiaoxia Ye
- National
Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
| | - Xiaoling Wang
- National
Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
| | - Xuepin Liao
- National
Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
| | - Xin Huang
- Department
of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, China
- National
Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
| | - Bi Shi
- National
Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
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41
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Soghomonyan D, Trchounian K, Trchounian A. Millimeter waves or extremely high frequency electromagnetic fields in the environment: what are their effects on bacteria? Appl Microbiol Biotechnol 2016; 100:4761-71. [DOI: 10.1007/s00253-016-7538-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Revised: 04/02/2016] [Accepted: 04/05/2016] [Indexed: 12/11/2022]
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42
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Dyka LD, Shakina LA, Strashnyuk VY, Shckorbatov YG. Effects of 36.6 GHz and static magnetic field on degree of endoreduplication in Drosophila melanogaster polytene chromosomes. Int J Radiat Biol 2016; 92:222-7. [PMID: 26882320 DOI: 10.3109/09553002.2016.1137105] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Purpose To study the effect of microwave (MW) irradiation and consistent action of microwaves and static magnetic field (MF) on the giant chromosomes endoreduplication in Drosophila melanogaster Meig. Materials and methods Experiments were carried out on inbred wild type Canton-S strain. Exposure to microwaves (frequency - 36.64 GHz, power density - 1 W/m(2), exposure time - 30 sec) and static magnetic field (intensity - 25 mT, exposure time - 5 min) applied at the egg stage after a 2-h oviposition. Giant chromosomes were investigated in squashed preparations of the salivary glands stained by acetoorcein by the cytomorphometric method. Preparations were obtained from Drosophila larvae at the 0 h prepupae stage. Results Exposure to microwaves increased the degree of polyteny in chromosomes (DPC) by 7.5%, and the statistical power of the impact was: h(2) = 35.3%. A similar effect occurred after the sequential action of microwaves and static magnetic field: The polyteny level of chromosomes increased by 7.4%, statistical power was: h(2) = 30.6%. Conclusions Exposure to microwaves on the stage of embryogenesis has a stimulating effect on endoreduplication in Drosophila development. The effect of microwaves was not modified by the action of the static magnetic field.
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Affiliation(s)
- Liliia D Dyka
- a Institute of Biology , V. N. Karazin Kharkiv National University , Kharkiv , Ukraine
| | - Lyubov A Shakina
- a Institute of Biology , V. N. Karazin Kharkiv National University , Kharkiv , Ukraine
| | | | - Yuriy G Shckorbatov
- a Institute of Biology , V. N. Karazin Kharkiv National University , Kharkiv , Ukraine
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