Volume 100, Nº 2 (2021)

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Introduction. The formation of an optimal microclimate and ensuring the purity of atmospheric air in residential areas is possible in urban planning design practice by regulating the wind regime, which determines the thermal state of a person and the quality of the living environment, the temperature and humidity regime. 

The aim of the study is to assess the impact of the width, density, and planning techniques of main streets on the aeration regime and reduction of the concentration of motor transport emissions in the air of residential areas.

Material and methods. The research was carried out both in full-scale conditions on the streets of large cities and residential buildings’ models at a scale of 1:20 using cup anemometers.

Results. The regularities of the formation of the aeration regime and the level of gas contamination of main streets with different planning and development methods are established. The dependences of the coefficient of air flow transformation in terms of the speed on the width of streets and the size of gaps between buildings are obtained. Planning conditions that exclude the possibility of a closed circulation of impurities in street canyons are determined. The spatial and temporal dynamics of air pollution of transport communications in residential areas of settlements is studied.

Conclusions. Hygienic standards for the content of motor transport emissions in the air of residential areas are provided by the optimal aeration mode, formed by choosing the width, position of the route, number of floors, planning techniques, and density of development of main streets. Simultaneously, it is necessary to introduce measures aimed at reducing the gross emissions of pollutants into the atmosphere and eliminating foci of atmospheric pollution on the transport networks of cities. When selecting urban planning decisions that ensure the environmental quality of the living environment of settlements in different geographical areas, it is necessary to consider the peculiarities of spatial-temporal dynamics of air pollution by transport and communications, due to changes in meteorological conditions and fluctuations in the intensity of traffic by hour of day, day of week and season of the year.

Introduction. The article presents data on tritium concentrations in various types of aquatic environments (rainfall, snowfall, water from the Irtyash, B. Nanoga, Kyzyltash lakes, and the source of the Techa river, tap water, ice from the refrigerator, and urine) within the city of Ozersk and on the territory immediately adjacent to it in the impact zone of Mayak Production Center in the Southern Urals.

Material and methods. For the quantitative determination of tritium in various aqueous media, sampling was carried out from 2002 to 2016. Samples were analyzed by the scintillation method using a single-stage electrolytic enrichment procedure.

Results. Almost all aquatic environments in Ozersk in terms of their tritium content exceed the technogenic background established for the Ural region. On average, this excess is by 14, 11, 9, 19, 4, 6, 19 times for rainfall, snowfall, drinking water of residential premises, ice, the water of the Irtyash and B. Nanoga lakes, water from the source of the river Techa accordingly. Elevated concentrations of tritium in the urine of Ozersk people and the adjacent territory were noted in comparison with literature data for other regions of the world.

Conclusion. The obtained research results revealed the levels of pollution of the aquatic environment of Ozersk with tritium relative to the level of technogenic background. These works indicate the need to develop a method for cleaning tritium emissions and discharges by nuclear enterprises to reduce the risk to the population.

This work presents a review of the available experimental and theoretical data on the effects of electromagnetic radiation from the global mobile communications system (GSM) on a living organism. Radiation exposure has long been a problem for the public, health policymakers, and researchers. Recently, the effect of radiofrequency radiation on biological objects has increased significantly. In 2011, the International Agency for Research on Cancer reviewed the published literature and classified this type of radiation as a potent (group 2B) carcinogen for humans. To date, research results indicate a wide range of adverse effects on human health associated with radiation in the radio range. Of particular concern is the effects of this factor on reproductive function and the nervous system, particularly in children’s developing brains. Radiation from a cell phone, leaning against the head of a child, has a more detrimental effect on brain structures than in the case of an adult. Experimental studies also show men wearing cell phones in their trouser pockets lead to a significant decrease in sperm cells and the deterioration of mobility and morphology. Based on the accumulated evidence, we suggest Federal Service on Customers’ Rights Protection and Human Well-being Surveillance (Rospotrebnadzor) and Federal Agency for the Supervision in Education and Science (Rosobrnadzor) introduce control over the use of cell phones by children under 16 years of age and pregnant women and review the place of radiofrequency radiation in the systematics of hazardous environmental factors.

Introduction. Dust is one of the main harmful factors in underground coal mining. The dust concentration in the coal mines remains high due to the imperfection of the used technologies, increasing the pneumoconiosis risk in miners. Respirators are the last means of protection, but information about their effectiveness is contradictory.

Aim. Assess the effectiveness of individual respiratory protective devices in the coal mines.

Material and methods. The protection factor (PF), the ratio of the dust concentration outside the mask to the concentration under the mask) is used to assess respirators’ effectiveness. We measured the PFs in the laboratory and the workplaces. We also measured the time the miners did not use respirators. The measurements’ results were used as input data for mathematical modeling to reduce dust load reduction.

Results. The concentration of dust under the mask exceeded the Occupational Exposure Limit (OEL) in most cases. Information about the high efficiency of the negative pressure half-mask respirators (in case of continuous use) was not confirmed. The PFs measured under laboratory conditions reached 6.2, and in the workplace were from 5 to 31. The miners did not use respirators from 10 to 45% of the shift duration (15 measurements). The measurements and information on the concentration of dust in 5 mines were used to simulate the impact of the respirators’ usage on the dust load. Calculations performed by different methods, and using various programs, gave the same result. The negative pressure half-mask respirators cannot reduce the dust’s concentration in the inhaled air to the OEL even with continuous use.

Conclusion. The results showed that the respirators’ usage could not prevent developing incurable pneumoconiosis in miners.

Introduction. The state of physical development of children and adolescents is an objective criterion of health. It is accepted to be most crucial index for predicting further child development, his readiness for sports, working life, and planning of training loads during physical education.

Material and methods. The monitoring group included 7-17-year schoolchildren (820 girls, 748 boys). The body height, weight, chest circumference, the vital capacity of the lungs, the muscle strength of the hands were measured (standard techniques and instruments). A comparative assessment of the obtained indices with similar data of 1976, 2000 was performed. 

Results. The body height of schoolchildren decreased over the period 1976/2018, there was an increase in body of body weight. The chest circumference trend was uncertain: dropped (boys - 7,8, girls 7, 12-15 years old); increased ( boys 9-15, girls 8-11,16,17 years old). The increase in the lung vital capacity was noted mostly in boys, muscle force of the hands decreased ( boys 10, 13, 16, girls 15-16 years old ). The Stange test values have doubled in the dynamics of 7-17 years, the Genchi test increased by 73.1% for boys and by 8-10% for girls. 

Conclusion. The revealed features of the dynamics of anthropometrics and functional indices of schoolchildren argue the need to correct physical education programs, including the tolerance motor and power loads.

Introduction. Considering the essential biological role of selenium, including its role in preventing cardiovascular diseases and its widespread deficit in soils, assessing selenium status for Crimean region inhabitants is an actual task.

Material and methods. Determination of selenium content in hair as index the of long-term element’s intake into the human body by all pathways were determined by the fluorometric method in 46 inhabitants (18–20 years old) from city Simferopol. Additionally, the selenium was determined in water and food products in Simferopol and nearby residential territories.

Results. Selenium content in most residents’ hair varied from 210 to 309 mсg/kg and 12–40% less than the normal range’s lower limit. These results show the selenium deficiency in urban residents from the Crimean region, mainly due to the low content of this element in cereal products and, to a less degree, – in water. However, most food products, which are the primary source of selenium in Crimean inhabitants’ diet, are delivered from other Russian regions. So it’s possible to assess the selenium supply of inhabitants, but it is not possible to make a total conclusion about the selenium status of the region.

Conclusion. The revealed deficiency of selenium in Crimean region inhabitants and the literature data about the positive and close relationship between hyposelenosis and the quality of public health requires the extensive monitoring of the selenium content in soils and crop production the Crimean peninsula territory.

Introduction. Authors present information on the results of social and hygienic monitoring of personnel’s health status at hazardous radiation facilities and the assigned contingent of healthcare institutions of Russia’s FMBA. The main causal patterns of the influence of risk factors on morbidity and mortality from malignant neoplasms (MNO) among employees of enterprises and the attached contingent of organizations served by healthcare institutions of the FMBA of Russia were revealed.

Material and methods. The object of the study was the data on malignant neoplasms obtained from the Federal State Budgetary Institution FTSITEP FMBA of Russia and the Branch Medical and Dosimetric Register of the A.I. Burnazyan FMBA of Russia for 2012-2016.

Comparative data of official medical statistics on the incidence of malignant neoplasms and mortality from them in the contingent served by FMBA hospitals, according to the nosological forms of ICD-10 and age groups with similar indices in Russia as a whole, were studied and analyzed (“NMITs Radiology” of the Ministry of Health of Russia).

Results. An increase in the incidence of malignant neoplasms in Russia’s FMBA for 2012-2016 (328.4-359.6) and the Russian Federation (367.3-408.6) was noted. 9, which is significantly less than the all-Russian indices (201.0–201.6). The annual mortality rate in 2016 was lower in Russia’s FMBA patients (17.7%) than in the Russian Federation (23.3%). The five-year survival rate in Russia’s FMBA was close to that in the Russian Federation (49.9-54.3%.) It was noted that the largest number of cancer cases was observed in the older age groups: 40-59 years: 23.3-26.6%; 60-85 years: 72.2-68.3%, the same as in the Russian Federation.

Conclusion. The research results can become the basis for the development of measures for medical and social rehabilitation of employees of enterprises and organizations served by medical and preventive institutions of the FMBA of Russia and the assigned contingent. In the area of the location of hazardous radiation facilities, constant monitoring and analysis of indicators of cancer incidence, carried out at a personal level using register technologies, is required.

The aim of our study was to investigate the regional characteristics of the external-cause mortality of the working-age population of the Republic of Buryatia during 2003–2017. 

Material and methods. The sources of information were the data of the Territorial Body of the Federal Service of State Statistics in the Republic of Buryatia (hereinafter – Buryatstat), medical certificates of death (f. No. 106/u-02), reports of forensic medical examinations for the specified period. The study was conducted using statistical, analytical, mathematical and comparative methods. The impact of human losses from accidents in working age on the demographic situation in the Republic was studied. The share of external-cause deaths of working-age people accounted for 38.1% of all deaths. In the structure of external causes of death, the predominant share of intentional self-injuries, including suicides (31.5%), murders (14.5%), was noted, with the contribution of all traffic accidents being 11.5%, accidental alcohol poisoning - 13.1%. According to 2016, the suicide mortality rate (66.8 per 100,000 population) was 3.3 times higher than the Russian average (20.4) and 1.9 times higher than the Siberian Federal District (SFD) (34.6). It should be noted that the suicide rate in Buryatia was almost 3.3 times higher than the critical parameters determined by World Health Organization experts (20 suicides per 100,000 population). The death rate from homicide in the Republic of Buryatia (30.0 per 100,000 people) was 3 times higher than the average in Russia (9.9) and 1.7 times higher than in the SFD (17.4). 

Conclusion. The high external-cause mortality rate related to the working-age population’s health is an objective reflection of the social and hygienic disadvantage of the Republic of Buryatia.

Introduction. Scientists from Horbachevsky Ternopil National Medical University, Ternopil, and various countries, including state laboratories, have thoroughly studied the biological significance of copper and zinc ions in the body for many years. Nevertheless, the value of the shortage or excess of these metals and their compounds in the body remains mostly underestimated for health. 

Purpose of work: to study the pathogenesis of traumatic disease occurring due to an imbalance of copper and zinc in the body.

Methods. Bibliosemantic and analytical methods were used. A literature search was conducted for the following queries as zinc, copper, heavy metals, negative impact. The investigation was performed with PubMed, Scopus, Web of Science, and Google Scholar for various articles. All publications have been analyzed and included in this review. The importance of these metals’ lack or excess and their compounds in the body remains mostly underestimated. Features of the pathogenesis of many diseases occurring due to imbalance of copper and zinc in the body have also been unexplored. The traumatic disorder was no exception, as this was not considered in experimental and clinical medicine.

Conclusion. From the analysis of the available scientific literature, no messages were found about the features of the course of traumatic disease in conditions of excessive intake of copper and zinc ions in the body. We can only assume that a violation of the functional ability of the liver, lungs, brain and other organs that occurs against the background of heavy metal ion damage creates an unfavorable background for the occurrence of a serious injury.

The article is devoted to I.V. Bertenson, the famous Russian hygienist and public figure, organizer of health care, a staunch follower of N.I. Pirogov. I.V. Bertenson made a significant contribution to the development of hospital hygiene in Russia. He combined the management of the first barrack hospital in Russia with the Petersburg provincial medical inspector’s post. A «School for the education of medical assistants» and a free clinic for visiting patients were also established on his initiative. I.V. Bertenson was one of the founders of the journal «Archive of forensic medicine and public hygiene» and the first editor of the «Bulletin of the Russian Red Cross Society.» In connection with the beginning of the cholera epidemic in the capital in 1866, Bertenson created one of the cholera shelters. A close friend, the first biographer editor of books N.I. Pirogov. Member of the international sanitary congresses and a member of many medical societies.

3 февраля 2021 г. исполняется 90 лет  со дня рождения доктора медицинских наук,  профессора, Заслуженного деятеля науки РФ  Пальцева Юрия Петровича – широко известного  в научных кругах учёного, крупного специалиста  в области медицины труда.