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Journal articles on the topic 'Microwave radiation'

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1

Pandey, Aditya, Omeed Momeni, and Pramod Pandey. "Quantitative Analysis of Genomic DNA Degradation of E. coli Using Automated Gel Electrophoresis under Various Levels of Microwave Exposure." Gels 10, no. 4 (2024): 242. http://dx.doi.org/10.3390/gels10040242.

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The problem that this study addresses is to understand how microwave radiation is able to degrade genomic DNA of E. coli. In addition, a comparative study was made to evaluate the suitability of a high-throughput automated electrophoresis platform for quantifying the DNA degradation under microwave radiation. Overall, this study investigated the genomic DNA degradation of E. coli under microwave radiation using automated gel electrophoresis. To examine the viable organisms and degradation of genomic DNA under microwave exposure, we used three methods: (1) post-microwave exposure, where E. coli
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2

MOTALLEBI, Ahad. "Effect of microwave radiation on seed viability, survival of Aspergillus niger van Tieghem and oil quality of oilseeds crops canola, soybean and safflower." Acta agriculturae Slovenica 107, no. 1 (2016): 73. http://dx.doi.org/10.14720/aas.2016.107.1.08.

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The effect of microwave's radiation on seed viability of three different oilseed crops, spores of <em>Aspergillus niger </em>and quality of extracted oil from treated seeds over various exposure times was evaluated. The seeds were exposed to 2450 MHz. at five different power levels of 0, 100, 200, 400, 600 and 800 W for two exposure times of three and five minutes. At a given time, a direct negative relationship between seed viability and microwave's radiation power level was detected. Substantial variation in the lethality of tested seeds to microwave's power levels was apparent i
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YANG, WEN-JEI, SADANARI MOCHIZUKI, and PAUL P. T. YANG. "APPLICATIONS OF MICROWAVE RADIATION IN MEDICINE." Journal of Mechanics in Medicine and Biology 02, no. 01 (2002): 53–63. http://dx.doi.org/10.1142/s0219519402000162.

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This paper presents major medical applications of microwave radiation in therapy and diagnostics of disorders of thermoregulation, especially hyperthermia and thermography. Microwave thermography is a thermal imaging system produced by self-emission, using emissivity differences to extend our vision beyond the shortwave red. Human tissues are partially transparent to microwaves, thus it is possible to detect the microwave of subcutaneous tissues in thermography, and to allow microwave energy penetration through subcutaneous tissues for deep-tissue heating in hyperthermia. The physics of microw
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4

Buchelnikov, Vasiliy D., D. V. Lousguine-Luzgin, Igor V. Bychkov, and A. P. Anzulevich. "Microwave Heating of Metallic Powders." Solid State Phenomena 152-153 (April 2009): 385–88. http://dx.doi.org/10.4028/www.scientific.net/ssp.152-153.385.

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It is known from experimental data that bulk metallic samples reflect microwaves while powdered samples can absorb such radiation and be heated efficiently. In the present paper we investigate theoretically the mechanisms of penetration of microwave radiation through a layer of metallic powder and microwave heating of such system.
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Mumtaz, Sohail, Juie Nahushkumar Rana, Eun Ha Choi, and Ihn Han. "Microwave Radiation and the Brain: Mechanisms, Current Status, and Future Prospects." International Journal of Molecular Sciences 23, no. 16 (2022): 9288. http://dx.doi.org/10.3390/ijms23169288.

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Modern humanity wades daily through various radiations, resulting in frequent exposure and causing potentially important biological effects. Among them, the brain is the organ most sensitive to electromagnetic radiation (EMR) exposure. Despite numerous correlated studies, critical unknowns surround the different parameters used, including operational frequency, power density (i.e., energy dose), and irradiation time that could permit reproducibility and comparability between analyses. Furthermore, the interactions of EMR with biological systems and its precise mechanisms remain poorly characte
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Ma, Yulin, Yao Cheng, Wenlong Shang, Dong Zhao, and Xianggang Duan. "Experimental Study on Coal Permeability Variation during Microwave Radiation." Advances in Materials Science and Engineering 2020 (February 24, 2020): 1–18. http://dx.doi.org/10.1155/2020/7270185.

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Coal-bed methane (CBM) is a new type of clean energy, which is abundant in China. Rational development and use of CBM can not only reduce the occurrence of mine disasters but also alleviate energy shortages. However, the “high storage capacity and low-permeability” characteristics of China’s CBM have hindered the realization of industrialized CBM production. To study the effect of microwave radiation on the permeability of coal reservoirs, a seepage experiment under different stress and microwave radiation conditions was carried out by using the seepage experiment system of gas-bearing coal un
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Handayani, S. U., Sutrisno, D. Ariwibowo, R. Amalia, and M. E. Yulianto. "OPTIMIZATION OF CONTINUOUS MICROWAVE INACTIVATOR FOR POLYPHENOL OXIDASE INACTIVATION ON GREEN TEA PROCESSING USING RESPONSE SURFACE METHODOLOGY." RASAYAN Journal of Chemistry 15, no. 02 (2022): 798–805. http://dx.doi.org/10.31788/rjc.2022.1526318.

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Microwave treatment is a promising technology for food processing such as drying, extraction, and enzyme inactivation because of its ionic heat transfer. This study develops and optimizes the fixation process in green tea using a microwave-based enzyme inactivator. A continuous microwave enzyme inactivator with a dimension of 3300 (L) × 550 (W) × 600 mm3 (H) was built to study the effect of temperature, microwave radiation time, and the number of microwaves on the catechin content of green tea. The optimum condition for the inactivation process was determined using response surface methodology
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8

Vitulli, William F., Jerry M. Mott, Joseph M. Quinn, Kathy L. Loskamp, and Rebecca S. Dodson. "Behavioral Thermoregulation with Microwave Radiation of Albino Rats." Perceptual and Motor Skills 62, no. 3 (1986): 831–40. http://dx.doi.org/10.2466/pms.1986.62.3.831.

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The objective of this exploratory study was to investigate the extent to which microwave radiation would reinforce operant behavior in a cold environment. A reversal-design with the single subject serving as its own control was used for testing the reinforcing properties of microwaves. Six albino rats were conditioned to produce 6-sec. pulses of microwave radiation within a refrigerated environment. The schedule of reinforcement was continuous (erf). Each lever press produced a 6-sec. output of microwave radiation. The intensity of radiation was varied across blocks of sessions in the reversal
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9

Pommerenke, Gerd. "About Cosmic Microwave Background Radiation (CMBR)." Annals of Computational Physics and Material Science 1, no. 2 (2024): 01–42. http://dx.doi.org/10.33140/acpms.01.02.03.

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Because the CMBR follows the PLANCK's radiation law more or less exactly, it should, because of the indistinguishability of individual photons, apply to a whatever black emitter. Therefrom arises the guess, that the existence of an upper cut- off frequency of the vacuum could be the cause for the decrease in the upper frequency range. Since the lower-frequent share of the curve correlates with the frequency response of an oscillating circuit with the Qfactor ½, it is examined, whether it succeeds to approximate the Planck curve by multi-plication of the initial curve with the dynamic, time- de
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10

Li, Guolin, Ting Shu, Chengwei Yuan, et al. "Simultaneous operation of X band gigawatt level high power microwaves." Laser and Particle Beams 28, no. 1 (2010): 35–44. http://dx.doi.org/10.1017/s0263034609990541.

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AbstractAs the pulse power and high power microwave source technologies gradually matured, technologies for enhancing the output capacities of high power microwaves are becoming more and more attractive. In this paper, two different methods for the increasing of X band microwave powers are discussed: diplexers based on microwave filter and photonic crystal. For the case of diplexer based on microwave filter, the dual channel X band microwaves transmit through the filters with high efficiencies, the polarization and radiation directions for the microwaves are the same. With the application of m
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11

Aniszewska, Monika, Arkadiusz Gendek, Jan Malaťák, Barbora Tamelová, and Sebastian Smyl. "Effects of Microwave Drying on Moisture Content Depending on Wood Chip Size Distribution." Environmental Sciences Proceedings 3, no. 1 (2020): 54. http://dx.doi.org/10.3390/iecf2020-07765.

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Pine, birch, and cotoneaster wood chips were segregated and exposed to microwave radiation. Moisture content was measured before and after microwave treatment, and the surface temperature of wood chip samples was recorded. The results showed that due to the selective nature of the process, the duration of microwave radiation should be adjusted taking into account the size fraction of the examined material. Wood chips exposed to microwaves for more than 30 s heated up to over 100 °C. Finer wood chips were found to lose moisture more slowly.
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Zieliński, Marcin, and Magdalena Zielińska. "Impact of microwave radiation on nitrogen removal and quantity of nitrifiers in biofilmA paper submitted to the Journal of Environmental Engineering and Science." Canadian Journal of Civil Engineering 37, no. 4 (2010): 661–66. http://dx.doi.org/10.1139/l09-171.

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The aim of this study was to determine the impact of microwave radiation on the efficiency of nitrification and on the percentage of ammonia-oxidizing bacteria in biofilm and to study the possibility of the occurrence of nonthermal effects caused by the interaction of microwaves and biofilm. Eight trickling filters with a biofilm were used in the experiment: four were exposed to microwave radiation, and four were heated with warm air as a control group. Microwave radiation at a frequency of 2.45 GHz was applied at an intensity of 18 W (0.01 W·cm–3of the reactor packing), which increased the bi
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13

Obukhova, M. V., E. I. Vialkova, L. V. Belova, A. M. Fugaeva, E. S. Korshikova, and A. D. Lapina. "Microwave Radiation in Wastewater Treatment and Sedimentations Treatment Technologies." Ecology and Industry of Russia 28, no. 7 (2024): 4–9. http://dx.doi.org/10.18412/1816-0395-2024-7-4-9.

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The main results of research on the use of microwave radiation in wastewater treatment and treatment of their sedimentations, as well as water treatment waste, are presented. The thermal influence of microwaves on the water and sedimentations properties is considered. The experimental data obtained by foreign and domestic specialists for the following processes using microwaves are shown: degradation of organic substances, de-emulsification of oil-containing wastewater, removal of metals, disinfection, intensification of biogas yield, sediments pyrolysis, modification of the absorbents, intens
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14

Saito, Yukie, Kousuke Nakano, Satoshi Shida, Tomoaki Soma, and Takanori Arima. "Microwave-enhanced release of formaldehyde from plywood." Holzforschung 58, no. 5 (2004): 548–51. http://dx.doi.org/10.1515/hf.2004.083.

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Abstract The release of formaldehyde from plywood has been greatly reduced by treatment with microwave radiation. Formaldehyde emission in the air was measured before, during, and after 2.45-GHz microwave treatment. The concentration of formaldehyde released increased with microwave irradiation and, after the microwave treatment, decreased to a level below that of nontreated material. Microwaves were effective in releasing free formaldehyde from the plywood, which is preferable to it being emitted as “potential formaldehyde” via hydrolysis. Microwaves released formaldehyde from plywood samples
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15

Ferguson, S., P. Bhatnagar, I. Wright, G. Sestric, and S. Williams. "Effects of Microwave Absorption on Long and Short Single-Walled Carbon Nanotubes at 10-6 Torr." International Journal of Nanoscience 14, no. 05n06 (2015): 1550025. http://dx.doi.org/10.1142/s0219581x15500258.

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Carbon nanotubes have been observed to emit ultraviolet, visible and infrared radiation when exposed to microwaves. We have performed experiments in which both short (0.5 μm–2 μm) and long (5 μm–30 μm) single and double-walled carbon nanotubes were exposed to 2.46 GHz microwaves at a pressure of ~ 10-6 Torr. Structural modifications of the carbon nanotubes due to microwave absorption have been studied using the Raman spectroscopy G-band and D-band intensities, which suggest that microwave irradiation at relatively low pressure results in an increase in nanotube defects, especially in the case
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16

Malyi, Eugene, Michael Chemerinskii, Iryna Golub, and Mariya Starovoit. "Thermochemical Conversion of Coal under Microwave Radiation." Chemistry & Chemical Technology 12, no. 4 (2018): 533–37. http://dx.doi.org/10.23939/chcht12.04.533.

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17

Horikoshi, Satoshi, Yuhei Arai, and Nick Serpone. "In Search of the Driving Factor for the Microwave Curing of Epoxy Adhesives and for the Protection of the Base Substrate against Thermal Damage." Molecules 26, no. 8 (2021): 2240. http://dx.doi.org/10.3390/molecules26082240.

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This study used controlled microwaves to elucidate the response of adhesive components to microwaves and examined the advantages of microwave radiation in curing epoxy adhesives. Curing of adhesives with microwaves proceeded very rapidly, even though each component of the adhesive was not efficiently heated by the microwaves. The reason the adhesive cured rapidly is that microwave heating was enhanced by the electrically charged (ionic) intermediates produced by the curing reaction. In contrast, the cured adhesive displayed lower microwave absorption and lower heating efficiency, suggesting th
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18

Jakubowski, Tomasz. "The effect of microwave radiation on the germination process of stored potato tubers." Acta Scientiarum Polonorum Technica Agraria 9, no. 1-2 (2010): 37–44. http://dx.doi.org/10.24326/aspta.2010.1-2.5.

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The purpose of the present paper was to study the effect of microwave radiation on the number and weight of sprouts appearing on potato tubers after its storage. The studies included three early potato cultivars (Felka Bona, Rosara and Velox), whose tubers were radiated with microwaves with the frequency of 2.45 GHz for the period of 10, 20 and 60 s. Results of the experiment show that microwave radiation significantly modifies the germination process of the stored potato tubers.
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19

Никифоров, V. Nikiforov, Терехов, et al. "Cytokine production by whole blood cells of the reconvalescents of community-acquired pneumonia under the influence of low-intensity microwave irradiation." Journal of New Medical Technologies. eJournal 8, no. 1 (2014): 1–6. http://dx.doi.org/10.12737/5025.

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The study discusses the effect on the functional state of the whole blood cells of low-intensity microwave radiation. On the model of intercellular interactions in the conditions of spontaneous cell activity and by stimulating cells complex mitogen, the influence of microwave radiation 1000 MHz on production by whole blood cells interleukins: IL-1β, 2, 6, 8, 10, 12, 13, 17A, TNF-alpha, IFN-g, RAIL-1, and soluble forms of toll-like receptor 1, 2, 4, 6 types was studied. The research results show that a single 45 minutes of exposure of microwave radiation of 0.05 PPM microwatt/cm2 has the abilit
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20

Yablonska, O. V., N. Y. Mekh та T. A. Duhnich. "ВЛАСТИВОСТІ SALMONELLA TYPHI ЗА ДІЇ ЕЛЕКТРОМАГНІТНОГО ВИПРОМІНЮВАННЯ НАДВИСОКОЇ ЧАСТОТИ". Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 18, № 3(71) (2016): 205–8. http://dx.doi.org/10.15421/nvlvet7147.

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In Ukraine, a role in the etiology of Salmonella enteric disease in humans and animals is important because there are changes in the structure of these pathogens serovariantic who skillfully adapted to the environmental conditions. Without studying the biological properties of pathogens, their accounting is impossible to predict the development of epidemiological and epizootic processes and to develop effective measures regarding the reduction of intestinal infections.Electromagnetic radiation of ultra–high frequency (UHF) is widely used in everyday life and medicine and more recently in veter
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Si, Wei, Cang Xiong, Yi Wen Jiang, Zhi Feng Xing, and Wei Pan. "Microwave Assisted Preparation of YAG and Yb:YAG Transparent Ceramic Nanopowders for Laser Crystal." Key Engineering Materials 697 (July 2016): 76–79. http://dx.doi.org/10.4028/www.scientific.net/kem.697.76.

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YAG and Yb:YAG transparent ceramic nanopowders for laser crystal were synthesized by microwave-assisted alkoxide hydrolysis precipitation method. The YAG and Yb:YAG nanopowders were characterized by differential thermal analysis and thermo gravimetric analysis (DTA-TG), infrared spectrum (IR), X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and photoluminescence (PL) spectrum. The results show that the crystallizing temperature of the precursor of YAG and Yb:YAG is about 930 °C. The pure phase YAG and Yb:YAG nanopowders can be obtained at microwave radiation power
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Sabadash, Vira, Anna Nowik-Zając, and Oleh Konovalov. "USE OF MICROWAVE RADIATION FOR EFFECTIVE PURIFICATION OF WASTEWATER FROM ORGANIC COMPOUNDS." Environmental Problems 9, no. 2 (2024): 96–100. http://dx.doi.org/10.23939/ep2024.02.096.

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This article is devoted to the problem of using microwave radiation as a potentially effective method of cleaning wastewater from organic compounds. The problem of cleaning wastewater from organic contaminants in the food industry requires highly effective methods since protein compounds in wastewater can cause environmental hazards and complicate the cleaning process. The purpose of the work was to investigate the effectiveness of using microwave radiation to purify wastewater from organic compounds, particularly protein impurities, and to establish the possibilities of this method for improv
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Grygierzec, Beata, Krzysztof Słowiński, Stanisław Mazur, et al. "Condition of Young Japanese Knotweed (Reynoutria japonica Houtt.) Offshoots in Response to Microwave Radiation of Their Rhizomes." Agronomy 13, no. 11 (2023): 2838. http://dx.doi.org/10.3390/agronomy13112838.

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Invasive Japanese knotweed is one of Poland’s most aggressive and difficult-to-control species. New methods of control are of utmost importance. This study aimed to analyze young knotweed offshoots’ regeneration and physiological condition after treatment of their rhizomes with microwaves of high frequency. The fresh rhizomes were microwaved in the laboratory once for different times (from 5 to 60 s, interval 5 s). Next, in the greenhouse, the growth of offshoots and their biochemical state (spectrophotometry of leaves) were recorded in three measurement series. It was shown that the microwave
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Palma, Vincenzo, Daniela Barba, Marta Cortese, Marco Martino, Simona Renda, and Eugenio Meloni. "Microwaves and Heterogeneous Catalysis: A Review on Selected Catalytic Processes." Catalysts 10, no. 2 (2020): 246. http://dx.doi.org/10.3390/catal10020246.

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Since the late 1980s, the scientific community has been attracted to microwave energy as an alternative method of heating, due to the advantages that this technology offers over conventional heating technologies. In fact, differently from these, the microwave heating mechanism is a volumetric process in which heat is generated within the material itself, and, consequently, it can be very rapid and selective. In this way, the microwave-susceptible material can absorb the energy embodied in the microwaves. Application of the microwave heating technique to a chemical process can lead to both a re
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Kakar, Uzair Mohammad, Atiqullah Sarwari, Mustafa Rahime, Mohammad Hassan Hassand, and Parwiz Niazi. "Revolutionizing Food Processing: A Comprehensive Review of Microwave Applications." European Journal of Theoretical and Applied Sciences 2, no. 2 (2024): 38–47. http://dx.doi.org/10.59324/ejtas.2024.2(2).04.

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The review explores the extensive applications of microwaves, covering the non-ionizing radiation spectrum from 300 MHz to 300 GHz. It emphasizes the growing role of microwaves in modern food technology, delving into their evolution, principles, advantages, and drawbacks, the analysis delves into the unique dynamics of microwave heating, considering factors like frequency, permittivity, and thermal properties. Microwaves offer benefits such as fast and even cooking, nutrient preservation, and improved thermodynamic output, the use of radiation in sterilization, drying, pasteurization, and blan
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Uzair, Mohammad Kakar, Sarwari Atiqullah, Rahime Mustafa, Hassan Hassand Mohammad, and Niazi Parwiz. "Revolutionizing Food Processing: A Comprehensive Review of Microwave Applications." European Journal of Theoretical and Applied Sciences 2, no. 2 (2024): 38–47. https://doi.org/10.59324/ejtas.2024.2(2).04.

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The review explores the extensive applications of microwaves, covering the non-ionizing radiation spectrum from 300 MHz to 300 GHz. It emphasizes the growing role of microwaves in modern food technology, delving into their evolution, principles, advantages, and drawbacks, the analysis delves into the unique dynamics of microwave heating, considering factors like frequency, permittivity, and thermal properties. Microwaves offer benefits such as fast and even cooking, nutrient preservation, and improved thermodynamic output, the use of radiation in sterilization, drying, pasteurization, and blan
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Valdés, Jesús, Daniel Reséndiz, Ángeles Cuán, et al. "Sol-Gel Synthesis of the Double Perovskite Sr2FeMoO6 by Microwave Technique." Materials 14, no. 14 (2021): 3876. http://dx.doi.org/10.3390/ma14143876.

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The effect of microwave radiation on the hydrothermal synthesis of the double perovskite Sr2FeMoO6 has been studied based on a comparison of the particle size and structural characteristics of products from both methods. A temperature, pressure, and pH condition screening was performed, and the most representative results of these are herein presented and discussed. Radiation of microwaves in the hydrothermal synthesis method led to a decrease in crystallite size, which is an effect from the reaction temperature. The particle size ranged from 378 to 318 nm when pH was 4.5 and pressure was kept
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Kuznetsov, D. B., A. Yu Mironov, V. A. Neschislyaev, et al. "Basics of the Development of Microwave Intensification of Upstream on the Example of <i>Escherichia coli</i>." Drug development & registration 10, no. 4 (2021): 72–80. http://dx.doi.org/10.33380/2305-2066-2021-10-4-72-80.

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Introduction. E. coli strains are the main microorganisms used for the production of a number of important biopharmaceutical products. There are no natural sources of microwave radiation on Earth, as it is absorbed by the upper atmosphere. No one doubts the importance of studying the biological effect of microwave radiation. The number of publications devoted to this problem is growing every year, and new ideas for the use of microwaves in drug production technology are emerging.Aim. Reveal the main effects of microwave irradiation and develop a technology for microwave intensification of E. c
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Zhu, Wenhe, Yan Cui, Xianmin Feng, et al. "The apoptotic effect and the plausible mechanism of microwave radiation on rat myocardial cells." Canadian Journal of Physiology and Pharmacology 94, no. 8 (2016): 849–57. http://dx.doi.org/10.1139/cjpp-2015-0537.

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Microwaves may exert adverse biological effects on the cardiovascular system at the integrated system and cellular levels. However, the mechanism underlying such effects remains poorly understood. Here, we report a previously uncharacterized mechanism through which microwaves damage myocardial cells. Rats were treated with 2450 MHz microwave radiation at 50, 100, 150, or 200 mW/cm2 for 6 min. Microwave treatment significantly enhanced the levels of various enzymes in serum. In addition, it increased the malondialdehyde content while decreasing the levels of antioxidative stress enzymes, activi
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DʼAndrea, John A. "Microwave Radiation Absorption." Health Physics 61, no. 1 (1991): 29–40. http://dx.doi.org/10.1097/00004032-199107000-00003.

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RICHA, RICHA. "Adverse Effect of Electromagnetic Radiation on Human Health: A Review." WORLD JOURNAL OF APPLIED SCIENCE AND RESEARCH 10-11, no. 01-02 (2021): 55. https://doi.org/10.59467/wjasr.2021.10-11.55.

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Electromagnetic radiation (EMR) is emitted by various devices and technologies. A review of the impact of EMR on human health has been presented here. In this paper, the author discussed different types of EMR and how these radiations affect human health. What health risks are associated with the use of a cell phone, microwave radio, microwave oven, X-rays, and gamma rays? The effect of EMR can be reduced by improved safety guidelines, public education and awareness, and reducing the exposure limit of those devices that produce EMR. . KEYWORDS :Electromagnetic Radiation, Ionizing Radiation, No
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RICHA, RICHA. "Adverse Effect of Electromagnetic Radiation on Human Health: A Review." WORLD JOURNAL OF APPLIED SCIENCE AND RESEARCH 10-11, no. 01-02 (2021): 55. https://doi.org/10.59467/wjasr.2020-21.10-11.55.

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Electromagnetic radiation (EMR) is emitted by various devices and technologies. A review of the impact of EMR on human health has been presented here. In this paper, the author discussed different types of EMR and how these radiations affect human health. What health risks are associated with the use of a cell phone, microwave radio, microwave oven, X-rays, and gamma rays? The effect of EMR can be reduced by improved safety guidelines, public education and awareness, and reducing the exposure limit of those devices that produce EMR. . KEYWORDS :Electromagnetic Radiation, Ionizing Radiation, No
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Marakina, E. I., N. S. Kobotaeva, V. I. Sachkov, O. S. Andrienko, and T. S. Skorokhodova. "Study of Microwave Radiation Influence on Fuel Oil Desulphurization Process." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 6 (99) (December 2021): 96–109. http://dx.doi.org/10.18698/1812-3368-2021-6-96-109.

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Many chemical processes are intensified by microwave radiation. The main factor determining the usefulness of microwaves in most transformations of organic compounds is the reaction time reduction to obtain the maximum yield of the target product. The presence of sulphur in oil and petroleum products is detrimental to refining equipment, and also has a negative impact on the environment in the form of waste generated during refining. In this connection development of methods on removal of sulphurcontaining compounds from oil products and oil by their transformation (in particular oxidation) an
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Strekalova, Anna A., Anastasiya A. Shesterkina, Alexander L. Kustov, and Leonid M. Kustov. "Recent Studies on the Application of Microwave-Assisted Method for the Preparation of Heterogeneous Catalysts and Catalytic Hydrogenation Processes." International Journal of Molecular Sciences 24, no. 9 (2023): 8272. http://dx.doi.org/10.3390/ijms24098272.

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Currently, microwave radiation is widely used in various chemical processes in order to intensify them and carry out processes within the framework of “green” chemistry approaches. In the last 10 years, there has been a significant increase in the number of scientific publications on the application of microwaves in catalytic reactions and synthesis of nanomaterials. It is known that heterogeneous catalysts obtained under microwave activation conditions have many advantages, such as improved catalytic characteristics and stability, and the synthesis of nanomaterials is accelerated several time
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Singhal, Umang, and Yash Pal. "Propellant-Less Thrust Generation - A Review." Applied Mechanics and Materials 852 (September 2016): 639–45. http://dx.doi.org/10.4028/www.scientific.net/amm.852.639.

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This paper introduces a concept of propellant-less microwave thruster for upper stage and space applications. The propellant-less microwave thruster works on classical electromagnetic theory, where the microwave radiations are converted to the electromagnetic pressure that acts as axial thrust. In microwave thrusters, microwaves are radiated to a sealed conical cavity which follows the contour of the thrusters to produce pressure. Normally, there are three types of methods by which thrust can be produced without utilizing any propellant. Cannae Drive, EmDrive, and the Wrap Drive are mostly use
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Pogrebnyak, N. I., S. F. Dyubko, M. P. Perepechai, and A. S. Kutsenko. "INVESTIGATION OF THE SPECTRUM OF ZN I ATOMS IN THE TRIPLET RYDBERG STATES." Radio physics and radio astronomy 26, no. 3 (2021): 256–69. http://dx.doi.org/10.15407/rpra26.03.256.

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Purpose: This work aims at investigating the zinc atoms in the triplet preionization – Rydberg states. The energy levels of atoms having two electrons outside the closed shell were studied mainly by the optical spectroscopy methods. However, just using the microwave spectroscopy to measure the frequency of transitions between the two Rydberg states allows to increase the accuracy of measurements in two or more orders of magnitude. Disign/methodology/approach:A line of three dye lasers is used to excite the zinc atoms into the triplet Rydberg states with a predetermined set of quantum numbers.
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37

Богатов, Н. А., В. С. Сысоев, Д. И. Сухаревский та М. Ю. Наумова. "Микроволновая диагностика разрядов в искусственном облаке заряженных водяных капель". Журнал технической физики 92, № 3 (2022): 386. http://dx.doi.org/10.21883/jtf.2022.03.52133.284-21.

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The microwave diagnostics of discharges occurring in an artificial cloud of charged water droplets created in an open air simulating the environment of thunderclouds is implemented. An artificial cloud with a droplet size of about 1 microns is opaque in the visible range, so intra-cloud discharges are not available for investigation by traditional methods in the spark discharge physics based on the registration of visible discharge radiation. Microwaves pass through such a cloud without noticeable attenuation, they interact only with the plasma of discharges occurring in the cloud. The probing
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38

Jaansalu, Michael, and Christopher Pickles. "Comparison of Ferronickel Alloys Produced via Microwave and Conventional Thermal Concentration of Pyrrhotite Tailings." Minerals 15, no. 3 (2025): 196. https://doi.org/10.3390/min15030196.

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In modern nickel mineral processing operations, the aim is to separate pentlandite from gangue minerals. One of these gangue minerals, pyrrhotite, contains up to 1 wt% Ni but is disposed of as waste, i.e., as tailings. Declining sulfide ore grades and increasing nickel demand have led to renewed interest in extracting nickel from pyrrhotite tails. One proposed process is thermal concentration, which aims to recover the nickel as a ferronickel alloy via thermal treatment at temperatures greater than 900 °C. Achieving these temperatures requires substantial energy input as the reactions involved
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39

Men, Junqi, Li Zhang, Ruiyun Peng, et al. "Metformin Ameliorates 2.856 GHz Microwave- Radiation-Induced Reproductive Impairments in Male Rats via Inhibition of Oxidative Stress and Apoptosis." International Journal of Molecular Sciences 24, no. 15 (2023): 12250. http://dx.doi.org/10.3390/ijms241512250.

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The reproductive system has been increasingly implicated as a sensitive target of microwave radiation. Oxidative stress plays a critical role in microwave radiation -induced reproductive damage, though precise mechanisms are obscure. Metformin, a widely used antidiabetic drug, has emerged as an efficient antioxidant against a variety of oxidative injuries. In the present study, we hypothesized that metformin can function as an antioxidant and protect the reproductive system from microwave radiation. To test this hypothesis, rats were exposed to 2.856 GHz microwave radiation for 6 weeks to simu
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40

Cui, Yancheng, Jin Meng, Kang Luo, Jiangfeng Han, Liyang Huang, and Danni Zhu. "A wideband high-power microwave radiation source based on gyromagnetic nonlinear transmission line and Vlasov antenna." Review of Scientific Instruments 93, no. 10 (2022): 104706. http://dx.doi.org/10.1063/5.0102437.

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The gyromagnetic nonlinear transmission line (GNLTL) is a special kind of coaxial transmission line partially loaded with the ferrite material. A GNLTL system can modulate the input high-power pulses into wideband high-power microwaves without relying on the electron beam and confining magnetic field. The unique working mechanism gives the GNLTL system the potential to be a small portable wideband high-power microwave radiation source. In this study, a wideband high-power microwave radiation source based on a GNLTL system is designed and constructed. In order to effectively radiate the wideban
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41

Aschoff, Jasmine, Stephan Partschefeld, Jens Schneider, and Andrea Osburg. "Effect of Microwaves on the Rapid Curing of Metakaolin- and Aluminum Orthophosphate-Based Geopolymers." Materials 17, no. 2 (2024): 463. http://dx.doi.org/10.3390/ma17020463.

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This paper deals with the influence of microwaves on the hardening and curing of geopolymer binders synthesized from metakaolin or aluminum orthophosphate with sodium silicate solution as the activator. Pure geopolymer pastes as well as geopolymer mortars were considered. The variable parameters were the modulus of the sodium silicate solutions (molar ratio of SiO2 to Na2O: 1.5, 2.0 and 2.5) and the Si/Al ratio (3/1 and 2/1). Selected samples were cured in a microwave oven until hardening, so the curing time depended on the mixture. For comparison some samples were cured at ambient temperature
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42

Bogatov N. A., Syssoev V.S., Sukharevsky D. I., and Naumova M. Yu. "Microwave diagnostics of electrical discharges in an artificial cloud of charged water drops." Technical Physics 92, no. 3 (2022): 306. http://dx.doi.org/10.21883/tp.2022.03.53260.284-21.

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The microwave diagnostics of discharges occurring in an artificial cloud of charged water droplets created in an open air simulating the environment of thunderclouds is implemented. An artificial cloud with a droplet size of about 1 microns is opaque in the visible range, so intra-cloud discharges are not available for investigation by traditional methods in the spark discharge physics based on the registration of visible discharge radiation. Microwaves pass through such a cloud without noticeable attenuation, they interact only with the plasma of discharges occurring in the cloud. The probing
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43

Bishara, S. W., and R. L. McReynolds. "Laboratory Aging and Annealing of Asphalt Binders by Microwave Radiation." Transportation Research Record: Journal of the Transportation Research Board 1535, no. 1 (1996): 98–107. http://dx.doi.org/10.1177/0361198196153500113.

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A household microwave oven with a frequency of 2.45 × 103 ±13 MHz and an output power of 1000 W is used to simulate short- and long-term aging of asphalt, and for annealing, prior to sampling, to remove steric (isothermal) hardening. A quartz petri dish holds the asphalt during microwave treatment, at atmospheric pressure. To simulate thin film oven (TFO) aging, a 10-g sample is microwaved for a total of 33 min. For 11 asphalts, the average difference in G*/sin δ, at limiting high temperature, between TFO and microwave aging is ±0.68 kPa. Simulating rolling thin-film oven (RTFO) aging is possi
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44

Sani, Yusuf, Raba’ah Syahidah Azis, Ismayadi Ismail, et al. "Recent Developments in Synthesis Techniques and Microwave Absorption Performance of Materials Based on Molybdenum Disulfide (MoS<sub>2</sub>) with Metal Oxides: A Review." Recent Progress in Materials 07, no. 01 (2025): 1–54. https://doi.org/10.21926/rpm.2501003.

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The widespread usage of various wireless equipment in many facets of life has significantly contributed to the serious pollution caused by electromagnetic radiation. Thankfully, scientists have created materials that can absorb microwave radiation and convert dangerous electromagnetic waves into other forms of energy, including heat energy. Many investigations regarding the development of materials that absorb microwaves with different constituents, morphologies, and architectures have been published recently. Microwave-absorbing materials (MAMs) are becoming more and more popular for use in a
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45

Dyka, L. D., and V. Yu Strashnyuk. "Microwave influence on the position effect variegation in Drosophila melanogaster Meig." Faktori eksperimental'noi evolucii organizmiv 23 (September 9, 2018): 363–68. http://dx.doi.org/10.7124/feeo.v23.1042.

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Aim. The purpose of investigation was to study the effect of microwave irradiation of different intensity on the manifestation of the position effect variegation (PEV) in Drosophila melanogaster Meig. Methods. Experiments were carried out on mutant strain In(1)wm4, y. Microwave radiation with frequency 36.64 GHz and power density 0.01; 0.1 and 1 W/m2, was used. Exposure to microwaves was applied in early embryogenesis after 2-hour oviposition. Exposure time was 30 sec. PEV was examined in the irradiated and non-irradiated (control) flies. Results. In females, microwave irradiation at a power d
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46

Marcelo, Teresa, João M. G. Mascarenhas, and Fernando A. Costa Oliveira. "Microwave Sintering – A Novel Approach to Powder Technology." Materials Science Forum 636-637 (January 2010): 946–51. http://dx.doi.org/10.4028/www.scientific.net/msf.636-637.946.

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The present paper focus on preliminary work carried out at INETI concerning the use of microwave radiation applied to sintering of both ceramic and metal powders. Due to the characteristics of materials-radiation interaction, microwaves can become an interesting power source in powder technology and other processing routes, since it is possible to lower the sintering temperature and shorten the sintering cycles, leading to time and energy savings. Alumina, hydroxyapatite, titanium and stainless steel powder compacts were sintered in a modified commercial oven of 2.45GHz and 1000W nominal power
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47

Qu, Ming Zhe. "Research on the Applications and Measurements of the Microwave Technology." Applied Mechanics and Materials 556-562 (May 2014): 3176–79. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.3176.

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Microwave technology is extensively used for point-to-point telecommunications. Microwaves are especially suitable for this use since they are more easily focused into narrower beams than radio waves, allowing frequency reuse; their comparatively higher frequencies allow broad bandwidth and high data transmission rates, and antenna sizes are smaller than at lower frequencies because antenna size is inversely proportional to transmitted frequency. Microwaves are used in spacecraft communication, and much of the world’s data, TV, and telephone communications are transmitted long distances by mic
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48

Sze, H., J. Benford, and W. Woo. "High-power microwave emission from a virtual cathode oscillator." Laser and Particle Beams 5, no. 4 (1987): 675–81. http://dx.doi.org/10.1017/s0263034600003189.

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Pinched electron beams emit high power microwaves by formation of a virtual cathode. Radiation occurs simultaneously with pinching or slightly thereafter. Observations of strong electrostatic fields and the partitioning of current into reflexing and transmitting populations at the same time that microwaves are emitted indicate virtual cathode formation. Microwaves originate mainly from the virtual cathode side of the anode. A two-dimensional model for the electron flow in the presence of a virtual cathode is presented. The model allows for electron reflexing and velocity distribution spread. S
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49

BOIPRAV, Olga V., Vadim A. BOGUSH, and Vladislav S. CHELYADINSKY. "MICROWAVE ABSORBERS BASED ON MÖBIUS STRIP RESONATORS." European Journal of Materials Science and Engineering 9, no. 1 (2024): 52–62. http://dx.doi.org/10.36868/ejmse.2024.09.01.052.

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The paper deals with technology of manufacturing of microwave absorbers with ordered and structured surface layer. This layer contains Möbius strip resonators, located on the fixed distance from each other. The technology was developed by the authors on the base of the following data: 1) results of theoretical study of microwaves interaction with Möbius strip resonator; 2) results of experimental study of electromagnetic radiation reflection, transmission and absorption coefficients in the microwave frequency range of the experimental samples of microwave absorbers based on Möbius strip resona
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50

Kapcsándi, Viktória, Martin Cserpán, and Erika Hanczné Lakatos. "Impact assessment of microwave treatment of raw cow's milk on its microbiological properties." Analecta Technica Szegedinensia 14, no. 2 (2020): 69–76. http://dx.doi.org/10.14232/analecta.2020.2.69-76.

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The aim of our research was to examine the impact of microwave radiation on the microbiological parameters of raw cow’s milk. In the measurements, our samples (raw cow’s milk) were treated at different power levels [100, 200, 300, 400, 496 (~500), and 600 W], and the effects of microwave irradiation were assessed regarding total plate count and yeast cell count. Treatment temperature was maximized in all cases (40 °C) in order to eliminate the thermal effect generated by microwaves, and hence, to justify the possible microbial inhibitor or destruction impact of the non-thermal effect of radiat
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