Food products contamination with xenobiotics of various genesis exerts negative influence on population health. According to multiple research performed on various territories in Russia, nitrates are basic contaminants occurring in food products and they make a considerable contribution into higher morbidity with specific nosologic forms, notably pathologies which are primarily caused by factors related to nutrition.The paper focuses on analysis of laboratory research data on nitrates concentrations in food products; the data were collected in Altai region and they are taken from research reports issued by certified test laboratories. The authors also performed their own laboratory research at the Institute for Occupational Hygiene and Industrial Ecology of the RF Public Healthcare Ministry; it allowed to conclude that increased nitrates contents in food products were a vital issue which requires further examination and research performed with high precision laboratory research techniques.We assessed hazard quotients (HQ) for nitrates occurring in vegetables and melons, individual carcinogenic risks (ICR), and population carcinogenic risks (PCR). Our hygienic assessment of nitrates concentrations in food products allowed us to reveal boundaries of risk properties variability.It is necessary to work out recommendations how to reduce exposure of Altai region population to nitrates and to give grounds for priority approaches to administrative decision-making aimed at lowering population risks caused by consumption of nitrates-contaminated food products.

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The article reflects methodological approaches to the construction of a priori models for assessing the occupational risk of medical workers in physiotherapeutic departments of sanatoriums under the influence of a complex of negative factors of the production environment. The authors carried out a comprehensive hygienic assessment of the occupational risk of medical personnel with the combined use of physiotherapeutic procedures in one of the sanatoria and resort institutions of the Altai Territory. The main objectives of the study were to measure physical, radiation and chemical factors in the work environment at workplaces of medical personnel and to calculate the degree of the occupational risk of workers in accordance with a priori risk assessment models. Based on the results of measurements of physical factors at workplaces of medical workers of physiotherapeutic departments, it is possible to conclude that complex harmful effects include inadequate levels of the air temperature in the work area, artificial illumination, air ionic composition of air and electromagnetic fields. The calculated risk was 0.0975, which corresponds to a moderate risk. The obtained results testify to the existence of a risk, the level of which cannot be neglected, despite the compliance of the level of impact with normative documents. The results of studies of the radiation factor at workplaces in the radon therapy department indicate the equivalent equilibrium radon volume activity to range from 25-109 Bq/m³,and the ambient dose equivalent of gamma radiation in the range of 0.15-0.18 μSv/h, which corresponds to hygienic standards. Therefore, the use of risk-oriented models seems reasonable even in working conditions that are not harmful or dangerous according to the criteria for a special assessment of working conditions. The leading role of electromagnetic radiation for this category of workers is proved in the course of calculations using risk-oriented models of professional risk assessment. It is proposed to develop measures to reduce the electromagnetic load, taking into account the medium and short-term outlook, with an annual review of the degree of occupational risk.

Introduction. Occupational health of medical workers is an intensively studied field of hygienic science. This is due to the high incidence of medical workers, which exceeds the average for sectors of the economy. The presented study uses a risk-based approach for a comprehensive assessment of the influence of physical factors on medical workers working with a large number of electronic medical equipment: physiotherapists, clinical laboratory diagnostics doctors, and ultrasound diagnostics doctors. Materials and methods. Studies of adverse factors of working environment factors were carried out in 4 medical institutions of the Altai Territory and the Novosibirsk Region. Based on the obtained results the values of health risk were calculated and a class of working conditions was established for all the studied jobs. Results. At the first stage, a hygienic assessment of working conditions at the workplaces of medical workers was conducted. The largest number of jobs did not meet sanitary standards for the following indicators: air temperature of the working area (55.6% of all jobs), artificial light (84.5%), light pulsation coefficient (46.7%), concentration of aero ions of negative polarity (57,8%), the coefficient of unipolarity (80%). In addition, a class of working conditions was established at each of the studied jobs (obtained in the range from 2 to 3.4). The estimated health risk of workers from exposure to gamma radiation varied from negligible to moderate. Limitations. Exposures to many of the physical factors in the workplace are approximate based on a typical work day for an employee by department and profession. Conclusion. An assessment of the harmful effects of physical factors at various workplaces in medical institutions heterogeneous for their purpose revealed similar violations in terms of microclimate parameters, illumination, air ion composition and electromagnetic fields from computer monitors, which is consistent with data obtained by previous researchers in this area. It seems necessary to implement a system of preventive measures for employees in medical organizations based on the concept of professional risk analysis with a review of the results each year, taking into account the worked experience.

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