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López-Martín E, Sueiro-Benavides R, Leiro-Vidal JM, Rodríguez-González JA, Ares-Pena FJ. Redox cell signalling triggered by black carbon and/or radiofrequency electromagnetic fields: Influence on cell death. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 953:176023. [PMID: 39244061 DOI: 10.1016/j.scitotenv.2024.176023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 09/02/2024] [Accepted: 09/02/2024] [Indexed: 09/09/2024]
Abstract
The capacity of environmental pollutants to generate oxidative stress is known to affect the development and progression of chronic diseases. This scientific review identifies previously published experimental studies using preclinical models of exposure to environmental stress agents, such as black carbon and/or RF-EMF, which produce cellular oxidative damage and can lead to different types of cell death. We summarize in vivo and in vitro studies, which are grouped according to the mechanisms and pathways of redox activation triggered by exposure to BC and/or EMF and leading to apoptosis, necrosis, necroptosis, pyroptosis, autophagy, ferroptosis and cuproptosis. The possible mechanisms are considered in relation to the organ, cell type and cellular-subcellular interaction with the oxidative toxicity caused by BC and/or EMF at the molecular level. The actions of these environmental pollutants, which affect everyday life, are considered separately and together in experimental preclinical models. However, for overall interpretation of the data, toxicological studies must first be conducted in humans, to enable possible risks to human health to be established in relation to the progression of chronic diseases. Further actions should take pollution levels into account, focusing on the most vulnerable populations and future generations.
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Affiliation(s)
- Elena López-Martín
- Department of Morphological Sciences, Santiago de Compostela, School of Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain.
| | - Rosana Sueiro-Benavides
- Institute of Research in Biological and Chemical Analysis, IAQBUS, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - José M Leiro-Vidal
- Institute of Research in Biological and Chemical Analysis, IAQBUS, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Juan A Rodríguez-González
- Department of Applied Physics, Santiago de Compostela School of Physics, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Francisco J Ares-Pena
- Department of Applied Physics, Santiago de Compostela School of Physics, University of Santiago de Compostela, Santiago de Compostela, Spain
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Bertuccio MP, Saija C, Acri G, Ientile R, Caccamo D, Currò M. Sulforaphane Effects on Neuronal-like Cells and Peripheral Blood Mononuclear Cells Exposed to 2.45 GHz Electromagnetic Radiation. Int J Mol Sci 2024; 25:7872. [PMID: 39063113 PMCID: PMC11276899 DOI: 10.3390/ijms25147872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 07/12/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024] Open
Abstract
Exposure to 2.45 GHz electromagnetic radiation (EMR) emitted from commonly used devices has been reported to induce oxidative stress in several experimental models. Our study aims to evaluate the efficacy of sulforaphane, a well-known natural product, in preventing radiation-induced toxic effects caused by a 24 h exposure of SH-SY5Y neuronal-like cells and peripheral blood mononuclear cells (PBMCs) to 2.45 GHz EMR. Cells were exposed to radiation for 24 h in the presence or absence of sulforaphane at different concentrations (5-10-25 µg/mL). Cell viability, mitochondrial activity alterations, the transcription and protein levels of redox markers, and apoptosis-related genes were investigated. Our data showed a reduction in cell viability of both neuronal-like cells and PBMCs caused by EMR exposure and a protective effect of 5 µg/mL sulforaphane. The lowest sulforaphane concentration decreased ROS production and increased the Mitochondrial Transmembrane Potential (Δψm) and the NAD+/NADH ratio, which were altered by radiation exposure. Sulforaphane at higher concentrations displayed harmful effects. The hormetic behavior of sulforaphane was also evident after evaluating the expression of genes coding for Nrf2, SOD2, and changes in apoptosis markers. Our study underlined the vulnerability of neuronal-like cells to mitochondrial dysfunction and oxidative stress and the possibility of mitigating these effects by supplementation with sulforaphane. To our knowledge, there are no previous studies about the effects of SFN on these cells when exposed to 2.45 GHz electromagnetic radiation.
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Affiliation(s)
- Maria Paola Bertuccio
- Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, 98125 Messina, Italy; (C.S.); (G.A.); (R.I.); (M.C.)
| | | | | | | | - Daniela Caccamo
- Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, 98125 Messina, Italy; (C.S.); (G.A.); (R.I.); (M.C.)
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Vaquero-Gallardo N, Millán-Blasco O, Martínez-García H. Fractional-Order Electrical Modeling of Aluminum Coated via Plasma Electro-Oxidation and Thermal Spray Methods to Optimize Radiofrequency Medical Devices. SENSORS (BASEL, SWITZERLAND) 2024; 24:2563. [PMID: 38676181 PMCID: PMC11053967 DOI: 10.3390/s24082563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 03/16/2024] [Accepted: 03/20/2024] [Indexed: 04/28/2024]
Abstract
Active medical devices rely on a source of energy that is applied to the human body for specific purposes such as electrosurgery, ultrasounds for breaking up kidney stones (lithotripsy), laser irradiation, and other medical techniques and procedures that are extensively used. These systems must provide adequate working power with a commitment not to produce side effects on patients. Therefore, the materials used in these devices must effectively transmit energy, allow for security control, sense real-time variations in case of any issues, and ensure the implementation of closed-loop systems for control. This work extends to the experimental data adjustment of some different coating techniques based on plasma electro-oxidation (PEO) and thermal spray (TS) using fractional-order models. According to the physical structure of the coating in different coating techniques, Cole family models were selected. The experimental data were obtained by means of a vector network analyzer (VNA) in the frequency spectrum from 0.3 MHz to 5 MHz. The results show that some models from the Cole family (the single-dispersion model and inductive model) offered a goodness of fit to the experimental impedance in terms of RMSE error and a squared error R2 close to unity. The use of this type of fractional-order electrical model allows an adjustment with a very small number of elements compared to integer-order models, facilitating its use and a consequent reduction in instrumentation cost and the development of control devices that are more robust and easily miniaturized for embedded applications. Additionally, fractional-order models allow for more accurate assessment in industrial and medical applications.
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Affiliation(s)
| | - Oliver Millán-Blasco
- Department of Electronics Engineering, Eastern Barcelona School of Engineering (EEBE), Technical University of Catalonia—BarcelonaTech (UPC), E-08019 Barcelona, Spain;
| | - Herminio Martínez-García
- Department of Electronics Engineering, Eastern Barcelona School of Engineering (EEBE), Technical University of Catalonia—BarcelonaTech (UPC), E-08019 Barcelona, Spain;
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Torres-Ruiz M, Suárez OJ, López V, Marina P, Sanchis A, Liste I, de Alba M, Ramos V. Effects of 700 and 3500 MHz 5G radiofrequency exposure on developing zebrafish embryos. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 915:169475. [PMID: 38199355 DOI: 10.1016/j.scitotenv.2023.169475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 12/12/2023] [Accepted: 12/16/2023] [Indexed: 01/12/2024]
Abstract
Telecommunications industries are rapidly deploying the fifth generation (5G) spectrum and there is public concern about the safety and health impacts of this type of Radio Frequency Radiation (RFR), in part because of the lack of comparable scientific evidence. In this study we have used a validated commercially available setting producing a uniform field to expose zebrafish embryos (ZFe) to unmodulated 700 and 3500 MHz frequencies. We have combined a battery of toxicity, developmental and behavioral assays to further explore potential RFR effects. Our neurobehavioral profiles include a tail coiling assay, a light/dark activity assay, two thigmotaxis anxiety assays (auditory and visual stimuli), and a startle response - habituation assay in response to auditory stimuli. ZFe were exposed for 1 and 4 h during the blastula period of development and endpoints evaluated up to 120 hours post fertilization (hpf). Our results show no effects on mortality, hatching or body length. However, we have demonstrated specific organ morphological effects, and behavioral effects in activity, anxiety-like behavior, and habituation that lasted in larvae exposed during the early embryonic period. A decrease in acetylcholinesterase activity was also observed and could explain some of the observed behavioral alterations. Interestingly, effects were more pronounced in ZFe exposed to the 700 MHz frequency, and especially for the 4 h exposure period. In addition, we have demonstrated that our exposure setup is robust, flexible with regard to frequency and power testing, and highly comparable. Future work will include exposure of ZFe to 5G modulated signals for different time periods to better understand the potential health effects of novel 5G RFR.
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Affiliation(s)
- Monica Torres-Ruiz
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Ctra. Majadahonda-Pozuelo Km. 2,2., Majadahonda, Madrid 28220, Spain
| | - Oscar J Suárez
- Radio Frequency Laboratory, Telecommunications General Secretary and Audiovisual Communication Services Ordenation, Madrid, Spain
| | - Victoria López
- Chronical Diseases Research Functional Unit (UFIEC), Instituto de Salud Carlos III (ISCIII), Ctra. Majadahonda-Pozuelo Km. 2,2., Majadahonda, Madrid 28220, Spain
| | - Pablo Marina
- Telemedicine and eHealth Research Unit, Instituto de Salud Carlos III (ISCIII), Avda. Monforte de Lemos, 5, Madrid 28029, Spain
| | - Aránzazu Sanchis
- Non-Ionizing Radiation Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Ctra. Majadahonda-Pozuelo Km. 2,2., Majadahonda, Madrid 28220, Spain
| | - Isabel Liste
- Chronical Diseases Research Functional Unit (UFIEC), Instituto de Salud Carlos III (ISCIII), Ctra. Majadahonda-Pozuelo Km. 2,2., Majadahonda, Madrid 28220, Spain
| | - Mercedes de Alba
- Environmental Toxicology Unit, Centro Nacional de Sanidad Ambiental (CNSA), Instituto de Salud Carlos III (ISCIII), Ctra. Majadahonda-Pozuelo Km. 2,2., Majadahonda, Madrid 28220, Spain
| | - Victoria Ramos
- Telemedicine and eHealth Research Unit, Instituto de Salud Carlos III (ISCIII), Avda. Monforte de Lemos, 5, Madrid 28029, Spain.
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Yin S, Han F, Zhou C, Zhao Y. Effect of rmEGF combined with ELF-EMF on promoting wound healing in rats. Technol Health Care 2024; 32:321-328. [PMID: 38669498 PMCID: PMC11191461 DOI: 10.3233/thc-248028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
BACKGROUND The process of wound healing is complex, and expediting it remains a challenge. The advantages of extremely low frequency electric and magnetic fields (ELF-EMF) are its non-invasive treatment, promotes healing and promotes myogenesis of C2C12 cells. Epidermal growth factor (EGF) is known to play a vital role in promoting wound healing, so a combination of ELF-EMF and EGF can have far-reaching significance. OBJECTIVE To study the effect of recombinant murine epidermal growth factor (rmEGF) combined with ELF-EMF on wound healing. METHODS Thirty-six rats were randomly divided into three groups: normal control group, EGF group, and ELF-EMF+EGF group, and a 20 mm × 20 mm dorsal wound was made. The wound healing rate of rats was calculated on the 3rd, 7th, 11th and 15th day. HE staining was used to observe the micro-morphological changes during the wound healing process. RESULTS The wound healing rate of EGF+ELF-EMF group was better than other groups. On the 15th day of wound healing, the wounds of each group were completely healed. On the 3rd, 7th, 11th and 15th day of HE staining, the early inflammatory cell infiltration, the arrangement of fibroblasts and the number of new capillaries in the wounds of EGF+ELF-EMF group were better than those of the other groups. CONCLUSIONS rmEGF combined with ELF-EMF significantly promotes wound healing in SD rats.
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Affiliation(s)
- Shuang Yin
- Department of Plastic Surgery, the Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Fujun Han
- Department of Plastic Surgery, the Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
- Emergency Department, SongBei Hospital of The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
- Department of Neurology, Heilongjiang Mental Hospital, Harbin, Heilongjiang, China
| | - Chenliang Zhou
- Emergency Department, SongBei Hospital of The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Yonghou Zhao
- Department of Neurology, Heilongjiang Mental Hospital, Harbin, Heilongjiang, China
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Ahmadi M, Shahbahrami R, Khajeh F, Khodaeivandi S, Kakavandi E, Raziabad RH, Ghanati K. Aflatoxin B1 and viruses' combined pathogenesis: A mini systematics review of invitro and invivo studies. Acta Histochem 2024; 126:152116. [PMID: 38101290 DOI: 10.1016/j.acthis.2023.152116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 11/08/2023] [Accepted: 11/13/2023] [Indexed: 12/17/2023]
Abstract
INTRODUCTION The combined pathogenesis of Aflatoxin B1 (AFB1) and several viruses such as HBV, EBV and influenza virus have been investigated yet the molecular mechanism of their interaction and possible synergistic effects is not fully understood. OBJECTIVES The aim of the current systematic review was to review in-vitro and in-vivo studies investigating the combined pathogenesis of aflatoxins and viruses. METHODS This systematic review was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines. PECO (Population, Exposure, Comparator, and Outcome) criteria for invitro and invivo studies were used to evaluate the eligibility of the studies for systematic review. RESULTS 21 studies were eligible for qualitative analysis based on the inclusion criteria. Of all the included studies, 9 (42.9 %) were invivo, 7 (33.3 %) were invitro-invivo and 5(23.8) articles conducted only invitro assay. Furthermore 14 (66.6 %) article explored hepatitis B virus (HBV) combination with AFB1, 4 (19 %) studied influenza A virus (SIV), 2 (9.7 %) were about Epstein-Barr virus (EBV) and only 1 (4.7 %) included hepatitis C virus (HCV). CONCLUSION The limited collected evidence suggests that AFB1 enhanced EBV and influenza virus pathogenesis. AFB1 also operated as a cofactor for HBV and EBV-mediated carcinogenesis. On the other hand HBV and HCV also induced AFB-1 carcinogenesis. Due to the limited amount of included studies and the inconsistency of their results further studies especially on HBV and SIV are essential for better understanding of their combined mechanisms.
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Affiliation(s)
- Mehdi Ahmadi
- Student Research Committee, (Department and Faculty of Nutrition Sciences and Food Technology), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ramin Shahbahrami
- Department of Medical Virology, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Khajeh
- Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Sepideh Khodaeivandi
- Department of Food Science and Technology, Afagh Higher Education institute, Urmia, Iran
| | - Ehsan Kakavandi
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Hazrati Raziabad
- Student Research Committee, (Department and Faculty of Nutrition Sciences and Food Technology), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Kiandokht Ghanati
- Student Research Committee, (Department and Faculty of Nutrition Sciences and Food Technology), Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Petroulakis N, Mattsson MO, Chatziadam P, Simko M, Gavrielides A, Yiorkas AM, Zeni O, Scarfi MR, Soudah E, Otin R, Schettino F, Migliore MD, Miaoudakis A, Spanoudakis G, Bolte J, Korkmaz E, Theodorou V, Zarogianni E, Lagorio S, Biffoni M, Schiavoni A, Boldi MR, Feldman Y, Bilik I, Laromaine A, Gich M, Spirito M, Ledent M, Segers S, Vargas F, Colussi L, Pruppers M, Baaken D, Bogdanova A. NextGEM: Next-Generation Integrated Sensing and Analytical System for Monitoring and Assessing Radiofrequency Electromagnetic Field Exposure and Health. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:6085. [PMID: 37372672 DOI: 10.3390/ijerph20126085] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/11/2023] [Accepted: 05/18/2023] [Indexed: 06/29/2023]
Abstract
The evolution of emerging technologies that use Radio Frequency Electromagnetic Field (RF-EMF) has increased the interest of the scientific community and society regarding the possible adverse effects on human health and the environment. This article provides NextGEM's vision to assure safety for EU citizens when employing existing and future EMF-based telecommunication technologies. This is accomplished by generating relevant knowledge that ascertains appropriate prevention and control/actuation actions regarding RF-EMF exposure in residential, public, and occupational settings. Fulfilling this vision, NextGEM commits to the need for a healthy living and working environment under safe RF-EMF exposure conditions that can be trusted by people and be in line with the regulations and laws developed by public authorities. NextGEM provides a framework for generating health-relevant scientific knowledge and data on new scenarios of exposure to RF-EMF in multiple frequency bands and developing and validating tools for evidence-based risk assessment. Finally, NextGEM's Innovation and Knowledge Hub (NIKH) will offer a standardized way for European regulatory authorities and the scientific community to store and assess project outcomes and provide access to findable, accessible, interoperable, and reusable (FAIR) data.
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Affiliation(s)
- Nikolaos Petroulakis
- Institute of Computer Science, Foundation for Research and Technology-Hellas (FORTH-ICS), 70013 Heraklion, Greece
| | | | - Panos Chatziadam
- Institute of Computer Science, Foundation for Research and Technology-Hellas (FORTH-ICS), 70013 Heraklion, Greece
| | | | | | | | - Olga Zeni
- Institute for Electromagnetic Sensing of the Environment, Consiglio Nazionale delle Ricerche (CNR-IREA), 80124 Napoli, Italy
| | - Maria Rosaria Scarfi
- Institute for Electromagnetic Sensing of the Environment, Consiglio Nazionale delle Ricerche (CNR-IREA), 80124 Napoli, Italy
| | - Eduardo Soudah
- International Centre for Numerical Methods in Engineering (CIMNE), 08034 Barcelona, Spain
| | - Ruben Otin
- International Centre for Numerical Methods in Engineering (CIMNE), 08034 Barcelona, Spain
| | - Fulvio Schettino
- Department of Electrical and Computer Science Engineering, University of Cassino and Southern Lazio, 03043 Cassino, Italy
| | - Marco Donald Migliore
- Department of Electrical and Computer Science Engineering, University of Cassino and Southern Lazio, 03043 Cassino, Italy
| | | | | | - John Bolte
- Research Group Smart Sensor Systems, The Hague University of Applied Sciences, 2628 AL Delft, The Netherlands
- Centre for Sustainability, Environment and Health, National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands
| | - Erdal Korkmaz
- Research Group Smart Sensor Systems, The Hague University of Applied Sciences, 2628 AL Delft, The Netherlands
| | | | | | | | - Mauro Biffoni
- Italian National Institute of Health, 00161 Rome, Italy
| | | | | | - Yuri Feldman
- Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Igal Bilik
- Department of Applied Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
- Department of Electrical and Computer Engineering, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel
| | - Anna Laromaine
- Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas (ICMAB-CSIC), 08193 Barcelona, Spain
| | - Martí Gich
- Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas (ICMAB-CSIC), 08193 Barcelona, Spain
| | - Marco Spirito
- Department of Microelectronics, Delft University of Technology, 2628 CN Delft, The Netherlands
| | | | | | | | - Loek Colussi
- Dutch Authority for Digital Infrastructure, 9700 AL Groningen, The Netherlands
| | - Mathieu Pruppers
- Centre for Sustainability, Environment and Health, National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands
| | - Dan Baaken
- Institute of Medical Biostatistics, Epidemiology and Informatics, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany
| | - Anna Bogdanova
- Institute of Veterinary Physiology, University of Zurich, 8006 Zurich, Switzerland
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Ramirez-Vazquez R, Escobar I, Martinez-Plaza A, Arribas E. Comparison of personal exposure to Radiofrequency Electromagnetic Fields from Wi-Fi in a Spanish university over three years. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:160008. [PMID: 36368387 DOI: 10.1016/j.scitotenv.2022.160008] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 10/28/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
In this work we present the personal exposure levels to Radiofrequency Electromagnetic Fields (RF-EMF) from Wireless Fidelity (Wi-Fi) 2.4 GHz and 5.85 GHz bands in a Spanish university, specifically, at the Faculty of Computer Science Engineering at the University of Castilla-La Mancha (Albacete, Spain). We present results from three years, 2017, 2018 and 2019 in the same study place and points; and measurements carried out in 2022 inside a classroom and inside a professor's office, with the aim to compare the measurements and verify compliance with reference levels established by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The minimum average was 0.0900 μW/m2 in the 2.4 GHz Wi-Fi, in 2019, and the maximum average was 211 μW/m2 in the 5.85 GHz Wi-Fi in 2017, around the building. Comparing the measurements carried out inside the classroom with students and without students, we identified that the maximum value was 278 μW/m2 (classroom with students, in the 5.85 GHz Wi-Fi band) and the minimum value was 37.9 μW/m2 (classroom without students, in the 5.85 GHz Wi-Fi band). Finally, comparing the results of all the measurements (average values) inside the classroom and inside a professor's office, the maximum value was 205 μW/m2 (in the 5.85 GHz Wi-Fi band) inside the classroom with students, and the minimum value was 0.217 μW/m2 inside a professor's office (in the 2.4 GHz Wi-Fi band). These values in no case exceed the limits established by the International Commission on Non-Ionizing Radiation Protection, 10 W/m2 for general public exposure.
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Affiliation(s)
- Raquel Ramirez-Vazquez
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España s/n, University campus, 02071 Albacete, Spain
| | - Isabel Escobar
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España s/n, University campus, 02071 Albacete, Spain
| | - Antonio Martinez-Plaza
- University of Castilla-La Mancha, Mathematics Department, School of Industrial Engineering, Avda. de España s/n, University campus, 02071 Albacete, Spain
| | - Enrique Arribas
- University of Castilla-La Mancha, Applied Physics Department, Faculty of Computer Science Engineering, Avda. de España s/n, University campus, 02071 Albacete, Spain.
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