Influence Of Electromagnetic Radiation Research Articles

Ethological Changes and Teratogenesis of Model Organisms as an Indicator of Biotesting of the Electromagnetic Radiation Influence

Ethological Changes and Teratogenesis of Model Organisms as an Indicator of Biotesting of the Electromagnetic Radiation Influence

Multistable dynamics in a Hopfield neural network under electromagnetic radiation and dual bias currents

This paper investigates a Hopfield neural network under the simulation of external electromagnetic radiation and dual bias currents, in which the fluctuation of magnetic flux across the neuron membrane is used to emulate the influence of electromagnetic radiation. Utilizing conventional analytical methods, the basic properties of the proposed Hopfield neural network are discussed. Due to the addition of electromagnetic radiation and dual bias currents, the Hopfield neural network shows high sensitivity to system parameters and initial conditions. The proposed Hopfield neural network possesses multistability with periodic attractor, quasi-periodic attractor, chaotic attractor and transient chaotic attractor, and all of the attractors are hidden attractors because there is no equilibrium point in the system. In particular, when the neuron membrane magnetic flux is different, the system can present transient chaos with different chaotic times. More interestingly, with the change of system parameters, the proposed Hopfield neural network can exhibit parallel bifurcation behaviors. Finally, the Multisim simulation and hardware experiment results based on discrete electronic components are conducted to support the numerical ones. These results could give useful information to the study of nonlinear dynamic characteristics of the Hopfield neural network.

NiMnO3 Anchored on Reduced Graphene Oxide Nanosheets: A New High-Performance Microwave Absorbing Material.

With the increasing influence of electromagnetic radiation on precision instruments and organisms, there is an urgent need for research on lightweight and high-strength electromagnetic wave absorbing materials. This study has probed into a new composite absorbing material based on reduced graphene oxide (rGO)-NiMnO3, where the like-core-shell NiMnO3 is anchored on the rGO nanosheets to significantly improve the electromagnetic wave dissipation ability of the composite material using the inter-component dipole polarization and interface polarization. At the same time, NiMnO3 can effectively adjust the impedance matching ratio of rGO so that electromagnetic waves can effectively enter the absorbing material. At a thickness of 3.73 mm, the maximum absorption strength of rGO-NiMnO3 reaches −61.4 dB at 6.6 GHz; at a thickness of 2.5 mm, the adequate absorption bandwidth is 10.04–18.00 GHz, achieving a full coverage for the Ku band. As a new option for preparing lightweight and broadband electromagnetic wave absorbing materials, rGO-NiMnO3 is an ideal material for electromagnetic wave protection.

Improving the quality of raw milk and yogurt

Milk is a part of many food products. In the expert assessment of the quality of raw materials, primary attention should be paid to its microbiological safety, since poisoning with dairy products is a common cause of diseases of the gastrointestinal tract. The experiment has been carried out on the base in the Teaching and Production Livestock Farm in the Federal State Budgetary Educational Institution of Higher Education “Russian State Agrarian University – Moscow Agricultural Academy named after K. A. Timiryazev” (Moscow). The purpose of the research was to improve the quality indicators of raw milk and yogurt. The method of processing raw milk, which reduces the number of potentially dangerous microorganisms in the products produced from it, has been studied. During the experiment the influence of electromagnetic radiation on organoleptic and physic and chemical parameters has been observed; the quantitative and qualitative composition of milk and yogurt microorganisms has been evaluated. The samples of raw materials had a uniform consistency without sediment and flakes, the color was milky white, and the smell was characteristic of natural cow’s milk. Electromagnetic treatment did not affect the main elements of the chemical composition of milk: the mass fraction of dry substances, fat, protein and lactose. In the experimental samples of raw milk after electromagnetic pulses treatment, the decrease in the growth rate of microorganisms including Quantity of Mesophilic Aerobic and Facultative Anaerobic Microorganisms (QMAFAnM), yeast and mold, has been noted. No bacteria of the Staphylococcus aureus and Escherichia coligroups have been found in the milk samples. The electromagnetic field had the negligible effect on the amount of lactic acid microorganisms in the raw material. During the experiment, there was no negative influence of electromagnetic radiation on the organoleptic, physic and chemical and sanitary-hygienic parameters of yogurt. The issues of ensuring the microbiological safety of raw milk have been described and the method for optimizing the sanitary and hygienic parameters of yogurt in accordance with the current requirements of regulatory documents has been suggest in the article.

Wi-Fi Radiation Negatively Influences Plant Growth and Biochemical Responses of Capsicum annuum L var. Pusa Jwala

Background:: Internet browsing has become an indispensable part of day-to-day life. Computers and the internet have occupied almost all sectors of human life. However, it is an artificial source of electromagnetic radiation, which has adverse effects on all living things in dose-dependant manner. Objective:: To understand the impact of electromagnetic radiations on plant, Capsicum annuum L. var. Pusa jwala emitted by Wi-Fi routers. Methods:: For the germination experiment, Chilli seeds were kept in close vicinity (5 cm) of a Wi-- Fi router for 10 days. For growth and biochemical analysis, different growth and biochemical attributes were studied after 21 days of exposure. Control seeds/plants were kept in another room with almost identical conditions like light, temperature, etc. Plant growth was measured in terms of fresh weight, shoot length, root length, leaf length, leaf breadth and leaf area index. In Biochemical analysis, chlorophyll-a, chlorophyll-b, total chlorophyll, soluble protein, lipid peroxidation and proline contents were measured as per standard protocols. Results:: The seed germination in the vicinity of the Wi-Fi router was reduced to 75% and other growth-related parameters like root and shoot length, leaf length, leaf width, leaf area index and fresh weight were significantly reduced. In the biochemical analysis, chlorophyll pigments (Chl. a, b and total chlorophyll) were observed to be reduced by 4.8, 7.2 and 5.7 fold, respectively and protein content reduced by 1.5 fold under the influence of electromagnetic radiations. The product of lipid peroxidation (malondialdehyde) (18 fold) and proline content (10 fold) was found to be increased synergistically. Conclusion:: The electromagnetic radiations emitted by the Wi-Fi router have a negative influence on the growth and biochemical responses in Chilli plants.

The influence of microwave electromagnetic radiation on rat heart morphogenesis during thyroidectomy

It is known that electromagnetic radiation affects the functional systems of living beings, in particular, the endocrine and cardiovascular systems and directly the heart cells and their functioning. In this case, the influence of electromagnetic radiation significantly affects the properties of the cardiovascular system and changes physiological processes in it. Moreover, sensitivity to signals is higher for biosystems with a higher level of organization. The method of simulating hypothyroidism for rats makes it possible to develop an experimental model for analyzing morphogenetic changes in the rat heart. Under conditions of hypothyroidism modeling, destructive changes in muscle fibers are observed in the myocardium after thyroidectomy, but after microwave irradiation with an exposure of 45 minutes, a regenerative-compensatory reconstruction of the structural components of the myocardium of the heart wall occurs. After thyroidectomy and microwave irradiation with an exposure of 120 minutes, an increase in degenerative and destructive processes in the heart myocardium was observed. For the first time, a comparative ultramicroscopic study using electron microscopy was carried out. It showed that after electromagnetic irradiation with an exposure of 45 minutes, the general structure of the mitochondrial apparatus does not change. Irradiation with an exposure of 120 minutes causes the destruction of subsarcolemal and paranuclear organelles, edema and degradation of intermyofibrillar mitochondria. After exposure to electromagnetic radiation with the exposure of 45 minutes in a hypothyroid state, a compensatory restructuring of the energy apparatus of the contractile cardiomyocytes of the left ventricle occurs due to the formation of mitochondria and an increase in their contact interaction. After exposure to radiation for 120 minutes, the development of destructive-degenerative processes in the mitochondrial apparatus of left ventricular cardiomyocytes, deepening of damage to intermitochondrial contacts was observed. The most significant increase in the relative volume of the endothelium in the areas of the rat heart myocardium was observed for the case of microwave irradiation only (without experimental hypothyroidism) with exposure duration of 45 minutes. Immunohistochemical study both for the case of microwave irradiation only and for the case of microwave irradiation under conditions of experimental hypothyroidism allows us to conclude that morphogenetic transformations are highly active in the myocardium of the heart when the duration of exposure is 45 minutes. This study will make it possible to develop recommendations for persons with thyroid diseases on the duration of daily exposure of staying in electromagnetic field emitted by devices with characteristics similar to the case under study.

СПОСОБЫ ЗАЩИТЫ АППАРАТУРЫ СОТОВОЙ (МОБИЛЬНОЙ) СВЯЗИ ОТ ЭЛЕКТРОМАГНИТНЫХ ВОЗДЕЙСТВИЙ

Under electromagnetic impact (EMI) of a sufficient level, temporary disruption of functioning, processing, transmission and storage of information in cellular equipment is possible. Possible problems of electromagnetic compatibility (EMC) of a mobile phone and a base station (BS) of cellular connection under the influence of electromagnetic radiation (EMR) from other sources and their negative impact on functioning are considered. The energy of the HF electromagnetic field (EMF) after passing through the protective case can affect the devices of shielded radio electronic equipment (REE), therefore, the possible negative consequences of the impact of high-energy EMF on the REE are described. Possible negative consequences under certain conditions from the influence of the skin-effect, the effects of electrostatic discharge and electromagnetic pulses on electronic devices are given. It is shown that the constructional method of protecting REE from the effects of external electromagnetic factors consists in reducing the collected and transmitted EMF energy by improving the design, placement and installation of equipment. Components of some vendors for 5G systems that are resistant to external interference are given, and the possibilities for reducing the radiation level of a cell phone are noted. The necessity of an integrated approach to solving EMC problems is substantiated, which consists in the use of structural, circuitry and structural-functional methods of EMC provision. The new 5G (Fifth Generation) standard will operate at higher operating frequencies compared to previous generations. Due to the workload of the electromagnetic spectrum at frequencies below 6 GHz, 5G networks will be based on wireless radio access systems operating at frequencies of 30–100 GHz, that is, in the lower band of the extremely high frequency range EHF (Extremely High Frequency), 30–300 GHz.

СОЦИОЛОГИЧЕСКАЯ ОЦЕНКА ВЛИЯНИЯ ЭЛЕКТРОННЫХ УСТРОЙСТВ НА ЗДОРОВЬЕ ЧЕЛОВЕКА

Background. In this article we have studied the results of a sociological survey of young people living in Omsk, users of modern electronic devices and their impact on the organs and systems of the human body.
 Objectives ― to study the frequency of using electronic devices in various spheres of life of Omsk residents; to assess the influence of electromagnetic radiation of a personal computer on the human body; establish the frequency of visits to the dentist for the purpose of a preventive examination.
 Methods. An electronic survey (Google Form) of 318 people was conducted in order to study issues related to electronic devices, general and dental health. The questionnaire consists of 25 questions, conventionally divided into 4 thematic groups.
 Results. Out of 318 people 80% of survey participants work on a personal computer every day for 2-3 hours without a break. 95% of respondents are aware of the negative effects of electromagnetic radiation from electronic devices. 52.5% of the respondents do not comply with the recommendations regulated by the Russian Federation when working on a PC; 11% have no information about their existence. 80.8% of respondents visit a dentist 1-2 times a year for a preventive examination.
 Conclusions. According to the results of a sociological survey in the format of a questionnaire, the majority of respondents work on a personal computer every day, not observing hygiene recommendations. It has been proven that a long stay at a personal computer is unsafe for human organs and systems. It is necessary to develop dental recommendations for the prevention of the negative impact of electromagnetic radiation from a personal computer on the state of the oral cavity.

СПОСОБЫ ЗАЩИТЫ АППАРАТУРЫ СОТОВОЙ (МОБИЛЬНОЙ) СВЯЗИ ОТ ЭЛЕКТРОМАГНИТНЫХ ВОЗДЕЙСТВИЙ

Under electromagnetic impact (EMI) of a sufficient level, temporary disruption of functioning, processing, transmission and storage of information in cellular equipment is possible. Possible problems of electromagnetic compatibility (EMC) of a mobile phone and a base station (BS) of cellular connection under the influence of electromagnetic radiation (EMR) from other sources and their negative impact on functioning are considered. The energy of the HF electromagnetic field (EMF) after passing through the protective case can affect the devices of shielded radio electronic equipment (REE), therefore, the possible negative consequences of the impact of high-energy EMF on the REE are described. Possible negative consequences under certain conditions from the influence of the skin-effect, the effects of electrostatic discharge and electromagnetic pulses on electronic devices are given. It is shown that the constructional method of protecting REE from the effects of external electromagnetic factors consists in reducing the collected and transmitted EMF energy by improving the design, placement and installation of equipment. Components of some vendors for 5G systems that are resistant to external interference are given, and the possibilities for reducing the radiation level of a cell phone are noted. The necessity of an integrated approach to solving EMC problems is substantiated, which consists in the use of structural, circuitry and structural-functional methods of EMC provision. The new 5G (Fifth Generation) standard will operate at higher operating frequencies compared to previous generations. Due to the workload of the electromagnetic spectrum at frequencies below 6 GHz, 5G networks will be based on wireless radio access systems operating at frequencies of 30–100 GHz, that is, in the lower band of the extremely high frequency range EHF (Extremely High Frequency), 30–300 GHz.

ВЛИЯНИЕ ЭЛЕКТРОМАГНИТНОГО ИЗЛУЧЕНИЯ НА ПРОНИЦАЕМОСТЬ ЭРИТРОЦИТАРНЫХ МЕМБРАН

The purpose of the survey is to experimentally study the influence of electromagnetic radiation from the decimeter range on the permeability of erythrocyte membranes. The object of the study was the blood of 80 white rats, 60 of them for three months were under the influence of electromagnetic radiation of the decimeter range. 20 animals of the control group were not exposed to electromagnetic fields. The intensity of free radical oxidation was evaluated using chemiluminescent analysis of red blood cells and blood plasma. The permeability of erythrocyte membranes and the content of reduced glutathione in blood erythrocytes were determined spectrophotometrically. A prolonged stay of animals under the influence of an electromagnetic field leads to pronounced changes in chemiluminescence indices in erythrocytes: a decrease in the maximum intensity of chemiluminescence (Imax), light sum (S), and light sum after the maximum value of chemiluminescence (Simax). Despite the increase in the content of glutathione and the chemiluminescent analysis index tg2 reflecting the antioxidant potential, there is an increase in the permeability of erythrocyte membranes under the influence of electromagnetic radiation

МОРФОЛОГИЧЕСКИЕ ИЗМЕНЕНИЯ ТКАНЕЙ ПРИ ПРИМЕНЕНИИ БИПОЛЯРНОЙ КОАГУЛЯЦИИ И НЕОДИМОВОГО ЛАЗЕРА В ГИНЕКОЛОГИИ

The article is devoted to a comparative analysis of morphological changes in the tissues of the reproductive system of women under the influence of a neodymium laser and bipolar coagulation during laparoscopic operations. The results of assessing the reliability of differences in morphometric indicators of tissue damage (sections of the fallopian tubes, fragments of ovarian tissue, membranes of benign cystic formations of the ovaries, leiomyomatous nodes of the body of the uterus) under the influence of electro magnetic radiation of various wavelengths are presented. The recorded changes directly depend both on the applied heat or light energy, and on the histological structure of the tissue under study. Fundamental differences in artifactual changes in tissues of the reproductive system were revealed when using bipolar coagulation and laser radiation in surgical practice, and the dependence of morphological changes on the wavelength of a neodymium laser was established for the first time.

Effect of electromagnetic radiation on the liver structure and ultrastructure of in utero irradiated rats

The aim of this study was to observe the influence of electromagnetic radiation (EMR) on the structure and ultrastructure of the rat’s liver. The pregnant rats used in the experiment were exposed to a pulsed microwave radiation (frequency of 2.45 GHz; mean power density of 2.8 mW/cm2) daily for 2 h, throughout their pregnancy. After delivery, the offspring was not exposed to EMR. Samples of the liver of 5-week-old offspring were subjected to histopathological evaluation. They were processed for light and transmission electron microscopy. Our results indicated that EMR did not cause pronounced changes in the structure of the liver of the investigated offspring. The size and shape of liver lobuli was preserved and the amount of connective tissue in the liver parenchyma did not increase. However, electron microscopy revealed changes in the shape and number of microvilli at the vascular pole of hepatocytes, and formation of vesicles of various shapes and sizes. The endothelial cells were swollen with larger fenestrations compared to the control group. The spaces of Disse were irregular and dilated. Even though these changes were only mild, further studies are needed to determine the effect of EMR and clarify its potential risk during pregnancy.

MATHEMATICAL MODEL FOR DETERMINING THE INTERNAL ELECTROMAGNETIC FIELD IN A SMALL FISH (WHITEBAIT)

The work is devoted to the development of a mathematical model that allows one to determine the electromagnetic fields of the microwave range inside sturgeon whitebait in order to stimulate their development. Our chosen method of calculating the mathematical model of internal electromagnetic fields in fish whitebait is planned to be used in the future for the experiment. This will increase the viability of whitebait as well as further healthy growth of sturgeon small fish and the selection of the best individuals for further artificial reproduction. A literature analysis of the influence of electromagnetic radiation on aquatic organisms and living organisms has been carried out. The effect of electromagnetic radiation on sturgeon whitebait in the first two weeks of their development is considered. In this case, the problems are solved using integro-differential equations in the case of quasi-statistics. A distinctive feature of this method is that it automatically satisfies the boundary conditions on the surface of the element. The solution of the problem of determining the electromagnetic fields inside the fish fry will be carried out taking into account its small size in comparison with the length of the falling electromagnetic radiation. In our case, as the larva grows, its size increases and the zero approximation give a rather crude result. Suggested expressions for zero, first, second, etc. approximations. Its allow take into account the growth of whitebait and the change in the ratio between their size and the incident wavelength. At the same time, it should be noted the high accuracy of this method, since already in the zero approximation its error did not exceed 15% in comparison with experimental studies of the scattering of electromagnetic fields on metal objects of ellipsoidal shape.

CONSEQUENCES OF CRITICALLY CONSTANT INTERACTIONS WITH A SMARTPHONE IN A PANDEMIC

In this article, the author examines the importance and necessity of protecting physicaland psychological health by controlling the use of mobile phones and smartphones in a pandemic, aswell as ways to counter potential harm to human life. The study of the problem was carried out at thelocal level, the main sources were on-line questioning of students, scientific research related to thegeneral problem considered in this work. An analysis of the statistical results of a survey of universitystudents will be carried out, which made it possible to identify a deterioration in the situation in thecontext of a global pandemic, as a result of which, educational institutions change the full-time formof education to on-line, which increases the number of forced calls to the device, which, togetherwith self-isolation, results in spending time with these gadgets to a new, higher level. The influenceof electromagnetic radiation on human health, the effect of the screen parameters and the timeallocated to the device on the visual system, as well as the likely consequences, the possible effect onthe cervical spine and deviations in the psychological health of a person will be considered. Topicallyrelevant scientific articles of other researchers and authors are analyzed, as well as some data fromopen sources. The result of the work is to consider the main vectors of influence on the body andpropose a number of significant solutions to reduce the harm done to the human body as a whole,which is necessary due to the increase in the number of requests, the lack of knowledge in this topicin a pandemic and the uncontrolled use of smartphones. Conclusion: according to the results of theanalysis of scientific works and the statistical result of the survey of students, it was revealed that inthe context of a general pandemic, the harm caused by mobile devices and smartphones increasesdue to an increase in the time of use, both forced and voluntary. Based on the results of the studiescarried out, it can be argued that control of the correct use of the electronic devices discussed in thearticle will lead to a partial parry of possible such damage, both physical and psychological, which isespecially important in a pandemic.

Research on the Influence of Electromagnetic Radiation in the Automobile on the SAR Value of Human Body

At present, the research on Evaluating Systematic Electromagnetic performance of automobile has gradually become a heated topic. With the deepening of research, personal safety in electromagnetic environment has been paid increasingly more attention. In terms of the complexity of the electromagnetic environment in the automobile, the automobile pole antenna, the wiring harness, the DC-DC converter, and the electromagnetic field distribution is simulated by the three-dimensional electromagnetic simulation software EMC studio, then the electric field intensity and the XZ plane current distribution at different seat positions can be obtained, and the SAR value absorption of human body at different seat positions and different human body sizes in the automobile is also calculated. The simulation results show that the electromagnetic radiation in the automobile will not do harm to the human body, which provides reference for the later research of human electromagnetic safety in electric automobile.

Models of temperature fields and their influence on polymeric coating adhesion

The article provides the results of the research into the high-frequency electromagnetic radiation influence on polyvinyl chloride based polymeric piping coatings as well as forecasting how radiation can affect adhesion. It also exhibits the improvement of materials efficiency leading to longer service and higher reliability of piping systems. A calculation method for temperature changes and distribution across the coated material under the influence of microwave radiation has been developed which is required to establish the most appropriate polymer treatment techniques.

Адаптаційні механізми імунної реакції у щурів за умов впливу помірно низьких температур у сполученні з електромагнітним випромінюванням низької частоти

Abstract: The immune system maintains a balance between the body's vital functions and influence of exogenous factors. Immune mechanisms are activated by the innate and adaptive response that allows the body to adapt to new living conditions, characterized by the simultaneous action of various factors. An experimental research in rats (for 30 days) studied the effect of moderately low temperatures (2-6°C), or in combination with electromagnetic radiation (70 kHz, 600 V/m) on the immune system to establish the features of adaptive-immunological responses of an organism. It was found that the effect of moderately low temperatures compared with the combined influence of electromagnetic radiation had a more pronounced effect, which was manifested by activation of the complement system (increased C4 and C5), increased concentrations of immunoglobulins (IgM, IgG) and enhanced functional activity of spleen (increased lymphoid follicles and their reactive centers). However, under the combined influence of the factors, the changes were less pronounced and modified (decrease in C4 content), that indicated the development of negative cross-adaptation in the immune system of animals. Probl Cryobiol Cryomed 2020; 30(3): 256–269

Influence of electromagnetic radiation emitted by daily-use electronic devices on the Eyemate\xae system in-vitro: a feasibility study

BackgroundEyemate® is a system for the continual monitoring of intraocular pressure (IOP), composed of an intraocular sensor, and a hand-held reader device. As the eyemate®-IO sensor communicates with the hand-held reader telemetrically, some patients might fear that the electronic devices that they use on a daily basis might somehow interfere with this communication, leading to unreliable measurements of IOP. In this study, we investigated the effect of electromagnetic radiation produced by a number of everyday electronic devices on the measurements made by an eyemate®-IO sensor in-vitro, in an artificial and controlled environment.MethodsThe eyemate®-IO sensor was suspended in a sterile 0.9% sodium chloride solution and placed in a water bath at 37 °C. The antenna, connected to a laptop for recording the data, was positioned at a fixed distance of 1 cm from the sensor. Approximately 2 hrs of “quasi-continuous” measurements were recorded for the baseline and for a cordless phone, a smart-phone and a laptop. Repeated measures ANOVA was used to compare any possible differences between the baseline and the tested devices.ResultsFor baseline measurements, the sensor maintained a steady-state, resulting in a flat profile at a mean pressure reading of 0.795 ± 0.45 hPa, with no apparent drift. No statistically significant difference (p = 0.332) was found between the fluctuations in the baseline and the tested devices (phone: 0.76 ± 0.41 hPa; cordless: 0.787 ± 0.26 hPa; laptop: 0.775 ± 0.39 hPa).ConclusionIn our in-vitro environment, we found no evidence of signal drifts or fluctuations associated with the tested devices, thus showing a lack of electromagnetic interference with data transmission in the tested frequency ranges.

Wireless Data Collecting Device with RF Energy Harvester for Aircraft

The paper considers the problems of developing the wireless devices for monitoring the parameters of aircraft units and assemblies and the wireless data transmission providing the low energy consumption and eliminating the external electromagnetic radiation influence on the data link. A structural diagram of the device is presented, a solution for the problem of the external electromagnetic field influence on the data link is proposed, and the energy consumption calculations for the device are presented.

Improvement of methods of the influence on microbiological indicators of raw milk

Improving the quality and safety of milk and dairy products requires professional work on the technology and culture of production, improving the operating conditions of equipment and improving methods for influencing microbiological indicators. A method of electromagnetic influence on the microbial cell control system is proposed that allows reducing the growth rate of microorganisms, optimizing the quality and safety of milk and increasing the shelf life of products. The object of the study was the milk of cows of Kholmogorskaya breed, which were housed at loose (group 1) and tie barn (group 2) methods. It has been found that the method of housing animals does not affect the physical and chemical parameters of the milk under study, which meet the requirements for raw materials. Density, freezing point, acidity, and somatic cell content in milk have been affected by the season of the year. Changes in the quantitative composition of sanitary-indicative microorganisms of raw milk depend both on the method of housing and milking cows, and on the season of the year. The highest contamination of milk with microflora has been observed in the case of cows housing in tie barn. The maximum number of microorganisms has been observed in the summer with different methods of housing. There were no Salmonella in the milk of experimental groups of cows. Yeast and fungi have been registered in all milk samples. The influence of electromagnetic radiation on the development of certain types of microorganisms has been established. The largest number of Quantity of Mesophilic Aerobic and Facultative Anaerobic Microorganisms (QMAFAnM) was in raw milk without additional effects and amounted to 486 289 CFU/cm[sup]3[/sup] . When exposed to electromagnetic pulses the number of yeast and mold fungi has been decreased by 9 or more times.