Hygiene and sanitation最新文献

{"title":"Indicators of the functional state of the circulatory system among agricultural machine operators","authors":"T. A. Novikova, V. Spirin, Andrey M. Starshov","doi":"10.47470/0016-9900-2023-102-10-1063-1068","DOIUrl":"https://doi.org/10.47470/0016-9900-2023-102-10-1063-1068","url":null,"abstract":"Introduction. Identification of functional disorders and prenosological conditions of the circulatory system under the conditions of adverse effects of the occupational environment is a necessary link in the development of measures to prevent health disorders in workers. Materials and methods. The study of functional indicators of hemodynamics, endurance and efficiency, functional reserves of the circulatory system, and ECG dispersion mapping using “Cardiovisor-06s” in eighty five male tractor drivers in agricultural production (agricultural machine operators) was carried out. The average age of the surveyed cases was 42.36±1.2 years, the average work experience in the occupation is 19.61±1.26 years. Results. Agricultural machine operators, whose working conditions are characterized by the influence of working environment factors with a prohypertensive effect, have been established to reveal changes in the indicators of the functional state of the circulatory system and a decrease in the adaptive capabilities of the body, indicating the manifestation of borderline states between the norm and pathology. Between the duration of work experience in the occupation and the level of functioning of the circulatory system, a statistically significant correlation was established (r = 0.53) According to ECG dispersion mapping, individual values of the “Myocardium” microalternation index in 14.3% of the examined cases corresponded to a borderline state close to the initial stage of probable pathology . The most pronounced changes, indicating a violation of cardiometabolic processes, were noted in workers over 40 years. The average values of the “Rhithm” index (RI), which characterizes the integral component of heart rate variability, which is a marker of the adaptive capabilities of the body, were in the range of 21–35% for all examined persons (with a normal value of 0–20%), which corresponded to an increased tension of regulatory systems or a borderline state. Increased individual levels of RI were more often recorded in people over 50 years. Limitations on the study are determined by the area of studying the subject of research in one professional cohort of workers. Conclusion. Early detection of prenosological changes in systemic hemodynamics and adaptation of the circulatory system can be one of the tools to identify the risk group of workers who need to develop and implement measures to prevent diseases of the circulatory system.","PeriodicalId":13009,"journal":{"name":"Hygiene and sanitation","volume":"BC-30 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139257456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the peculiarity of the combined action of a number of chemicals based on the analysis of parameterized cause-effect relationships of marketers of exposure and negative effects and quantitative evaluation of additional health risk","authors":"N. Zaitseva, M. Zemlyanova, J. V. Koldibekova, D. Kiryanov, V. Chigvintsev","doi":"10.47470/0016-9900-2023-102-10-1132-1142","DOIUrl":"https://doi.org/10.47470/0016-9900-2023-102-10-1132-1142","url":null,"abstract":"Introduction. Assessing the type of combined action of chemicals is a complex and pressing problem of hygiene and preventive medicine. The purpose of the work is to expand methodological approaches to assessing the characteristics of the combined interaction of a number of chemical substances based on the analysis of parameterized cause-and-effect relationships of exposure and negative effects and quantitative assessment of additional health risks. Materials and methods. There was applied basic multiple logistic regression model, which is an assessment of the probability of developing a negative effect simultaneously with the isolated and combined effects of substances. The model was implemented for three components, the exposure of which was confirmed by exposure to biomarkers. Expert assessment of the type of combined action, carried out taking into account the regression coefficients of the adopted models. Quantitative assessment of the additional risk of negative effects from isolated and combined exposure to substances is carried out according to the parameters of cause-and-effect relationships of exposure to biomarkers and effects. Approbation of the methodological method provided for conditions of exposure to short-term aerogenic exposure to benzo(a)pyrene, significantly exceeding the reference concentrations (15.4 Rfc), with combustion oxide and hydrofluoride at the level of reference indicators (0.2–0.8 Rfc). The results of a study of cause-and-effect relationships based on previously conducted (in 2021–2022) medical examinations of four hundred fifty four exposed and unexposed 4-7 years children were used as biomarker effects. Results. Depending on the binary combination of three chemical substances and the choice of biomarker of the negative effect (8 indicators), various options for the combined action were identified (24 options in total). For 10 of them, an increase in the adverse effect was established. The predominant nature of the action is the synergistic nature, which causes, in addition to the isolated one, the risk of developing negative effects on the part of the immune, bone and nervous systems, exceeding up to 56.8 times the acceptable level. Limitations. During the combination effect, there was measured the substance in a binary combination of substances, taking into account the adverse effect and the direction of biomarkers. Conclusion. In the practice of hygienic assessments, it is necessary to take into account the additional risk of developing negative effects with more complex types of combined action (synergism, antagonism) than simple summation, which will increase the objectivity of the hygienic assessment of the risk to the health of the exposed population. Compliance with ethical standards. The study was approved by the local ethical committee of the Federal Scientific Center for Medical and Reservative Technologies for Risk Management of the Population of the Rospotrebnadzor (meeting protocol ","PeriodicalId":13009,"journal":{"name":"Hygiene and sanitation","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139258859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hygienic assessment of sanitary and epidemiological well-being in modern urban educational institutions","authors":"E. Bulycheva","doi":"10.47470/0016-9900-2023-102-10-1096-1103","DOIUrl":"https://doi.org/10.47470/0016-9900-2023-102-10-1096-1103","url":null,"abstract":"Introduction. The restructuring of general education has led to the problem of overcrowding of schools, which in turn has caused the formation of a number of hygiene problems. Despite the active material and technical equipment of urban schools, the relevance of maintaining safe teaching conditions remains in general education. Materials and methods. The assessment of sanitary and epidemiological well-being in ten urban educational institutions was carried out according to the methodology of the Federal State Educational Institution ROSHUMZ-34-2016 “Algorithm for determining the level of sanitary and epidemiological well-being of an educational institution”. The intensification of the educational process was assessed according to the Federal Law ROSHUMZ-16-2015 “Hygienic assessment of the intensity of students’ learning activities”. Results. The leading factors that worsen the sanitary and epidemiological state of urban educational institutions were non-compliant with the hygienic requirements of the school environment and its premises, material and technical equipment, microclimate, lighting and the mode of management of training. The duration of extracurricular activities exceeded the standards by 1.8 times. In urban schools, the intensity of the educational process (class 3.1) was formed due to intellectual, sensory loads, monotony and the mode of academic work (class 3.1). It is necessary to regulate the volume of the academic load and introduce methods that allow quantifying the intensification of the educational process by analyzing the intensity of educational work. Limitations. The study on the assessment of the sanitary and epidemiological well-being in urban educational institutions was limited by the fact that the sample was represented by 10 urban schools, which does not allow them to be fully extrapolated to the total population of urban students. At the same time, the new type of schools included in the research with a design capacity of 1300 people could improve the indicators of sanitary and epidemiological safety, since modern newly built schools had good and new equipment, whereas in cities there are schools of the old type, where the learning conditions, the material and technical fund can be much worse. Conclusion. The data obtained emphasize the urgency of the need for continuous monitoring of educating conditions and the management of the educational process, taking into account modern risks that contribute to reducing the sanitary and epidemiological well-being in urban schools.","PeriodicalId":13009,"journal":{"name":"Hygiene and sanitation","volume":"2 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139255555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomarkers of stress in children with asthenic syndrome associated with aluminum contamination in biological media and A/G polymorphism of the HTR2A (rs7997012) serotonin receptor gene","authors":"O. Dolgikh, N. Zaitseva, Alena A. Subbotina, O. A. Kazakova, I. Alikina","doi":"10.47470/0016-9900-2023-102-10-1104-1107","DOIUrl":"https://doi.org/10.47470/0016-9900-2023-102-10-1104-1107","url":null,"abstract":"Introduction. Ambient air pollution with heavy metals, included aluminum, creates their elevated levels in children and leads to rather early decompensation of weak genetically heritable systems of the body including the nervous system. Materials and methods. We examined eighty six 4–7 years children with asthenic syndrome. Fifty two of them (the test group) lived and attended preschool facilities in a zone influenced by emissions from aluminum production (a dose created by a non-ferrous metallurgic plant is 5.65•10–5 mg/(kg•day)). The reference group was made of 34 children who lived on a conditionally clean territory and were exposed to airborne aluminum in a dose of 3.0•10–6 mg/(kg•day). Within this study, there were examined several children’s biological media including urine (aluminum), blood (serotonin and cortisol), and buccal epithelium (HTR2A rs7997012 gene). Differences were considered to be significant at a p<0.05. Results. We established statistically significantly higher aluminum levels in urine (1.3 times higher) in the test group against the reference one (0.012±0.0001 and 0.0092±0.0012 respectively); authentically higher prevalence of the minor allele G of the HTR2A (rs7997012) serotonin receptor gene (authentically 1.6 times higher in the test group against the reference one). Both these factors create an elevated risk of asthenic syndrome, 1.86 times higher in the test group (OR=1.86; 95%CI (1.02–3.67)) together with lower serotonin levels (130.28±32.42 ng/ml and 183.35±34.57 ng/ml respectively) and higher cortisol levels (278.08±25.90 nmol/cm3 and 191.28±21.62 nmol/cm3 respectively). Limitations. The limitation is application of the identified stress biomarkers for diagnostics of nervous system disorders that manifest themselves in children through asthenic syndrome associated with exposure to aluminum. Conclusion. A/G replacement of the HTR2A (rs7997012) gene creates a 1.86 times higher risk of asthenic syndrome (OR=1.86; 95%CI (1.02–3.67)) for children with elevated aluminum levels in urine under inhalation exposure to it in a dose equal to 5.65•10–5 mg/kg•day). The disease would have such a peculiarity as longer recurrence and its biomarkers include an imbalance between indicators of a developing stress, cortisol, and serotonin.","PeriodicalId":13009,"journal":{"name":"Hygiene and sanitation","volume":"59 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139256937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Expression of the TR53 oncosuppressor gene modified with benzo[a]pyrene and the SARS-COV-2 vaccine antigen in an in vitro experiment","authors":"O. Dolgikh, O. A. Kazakova","doi":"10.47470/0016-9900-2023-102-10-1043-1047","DOIUrl":"https://doi.org/10.47470/0016-9900-2023-102-10-1043-1047","url":null,"abstract":"Introduction. The impact of chemical and biological environmental factors is associated with the risk of a genetic predisposition to the development of cardiovascular and cancer-associated diseases, which determines the relevance of the search for genetic indicator markers of early disorders in the mRNA structure. Materials and methods. The analysis of TP53 rs1042522 gene polymorphism, as well as the relative normalized expression level of TP53 hs1034249_m1 transcript, in whole blood cell culture in healthy volunteers, both spontaneous and induced by 24-hour incubation with benzo[a]pyrene and SARS-CoV-2 vaccine antigen (at concentrations of 0.006 mg/kg). Ml), was conducted. Results. Comparative analysis of spontaneous and antigen-induced levels of TP53 hs1034249_m1 mRNA expression allowed establishing individual and group values of relative expression associated with the polymorphism features of the TP53 rs1042522 gene. Benzo[a]pyrene and SARS-CoV-2 were found to have opposite effects on the expression of hs1034249_m1 TP53 genes in the case of the CG rs1042522 genotype, while the combined effect of benzo[a]pyrene and SARS-CoV-2, which reflected the inhibition of the expression of hs00900055_m1 of the TP53 gene was associated with the GG genotype. The limitations of the study are the use of a relatively small sample and a limited number of whole blood samples. Conclusion. The ability of benzo[a]pyrene and SARS-CoV-2 at concentrations of 6 µg/L to modify the expression of the TP53 apoptosis gene in vitro has been shown, which makes it possible to consider the increase in the expression of hs00900055_m1 of the TP53 gene induced by benzo[a]pyrene as one of the mechanisms for aggravating the course of viral infections (SARS-CoV-2) in connection with loss of p53-controlling for the development of inflammation (its proliferative phase) for owners of the heterozygous variant of CG TP53 rs1042522. In the case of variant monozygotic polymorphism GG TP53 rs1042522, the combination of benzo[a]pyrene and SARS-CoV-2 leads to inhibition of the expression of hs00900055_m1 mRNA of the TP53 gene, which is phenotypically reflected by the formation of asthenia, immunosuppression and onco-proliferative complications. The hs00900055_m1 transcript of the TP53 gene is recommended as an indicator for the tasks of diagnosing early disorders associated with the combination of SARS-CoV-2+ benzo[a]pyrene. The experiment simulates the natural conditions of real combinations of influencing factors.","PeriodicalId":13009,"journal":{"name":"Hygiene and sanitation","volume":"50 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139258820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hygienic evaluation of environmental factors and public health in the Cosmodrome Vostochny","authors":"Artem D. Polyakov, M. Kombarova, A. S. Radilov, L. A. Alikbaeva, I. S. Yakubova, Anna V. Suvorova, O. Khurtsilava","doi":"10.47470/0016-9900-2023-102-10-1019-1028","DOIUrl":"https://doi.org/10.47470/0016-9900-2023-102-10-1019-1028","url":null,"abstract":"Introduction. The problem of using highly toxic components of rocket fuel remains one of the main issues in ensuring the hygienic safety of the territory affected by rocket and space activities. Materials and methods. A hygienic assessment of environmental objects was carried out; structural and dynamic analysis of medical and demographic indicators, and morbidity in the population of the city of Tsiolkovsky. Results. The sources of emissions into the atmospheric air during the operation phase of the cosmodrome are the launch complex of the launch vehicle, the technical complex and the complex for the production and storage of rocket fuel components. Regular operation of the Cosmodrome Vostochny is not accompanied by the release of asymmetric dimethylhydrazine and its transformation products into the environment. Classifying facilities for the preparation and execution of space flights as objects of extremely high risk is associated with a potential risk to the health in the city’s population, which may arise from combined multi-environment exposure to chemicals of hazard classes 1 and 2, including rocket fuel components. The prevalence in the age structure of the population of the city of Tsiolkovsky younger than working age indicates a progressive structure of the population, both due to reproduction and the influx of labour. Primary and general morbidity in children and adolescents is characterized by higher levels compared to the morbidity in adults. Limitations. A number of uncertainties associated with incomplete information about all possible contaminants of environmental objects, as well as a low level of sensitivity of the analytical methods used compared to reference concentrations, which can lead to an overestimation of possible exposure. Conclusion. In the context of the further development of space infrastructure and the creation of new rocket systems at the Cosmodrome Vostochny, ensuring safe living conditions for the city’s population implies the continuation and improvement of work to monitor the state of the environment, potential sources of its anthropogenic pollution, as well as assessing and predicting the health of the population.","PeriodicalId":13009,"journal":{"name":"Hygiene and sanitation","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139256416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Issues of using modern organic reagents in the practice of drinking water supply (literature review)","authors":"A.V. Alekseeva, O. Savostikova","doi":"10.47470/0016-9900-2023-102-10-1029-1034","DOIUrl":"https://doi.org/10.47470/0016-9900-2023-102-10-1029-1034","url":null,"abstract":"The article contains a literature review devoted to the safe use of modern organic reagents in drinking water supply practice. When conducting a literature search, the following databases were used as follows: Pubmed, Scopus, Web of Science, MedLine, Global Health, RSCI, as well as a search method based on keywords and citations. The purpose of the review is that despite the large number of developed technologies and various reagents, the problem of removing anthropogenic and anthropogenic pollutants from natural water purification cannot be considered to be solved. Water purification technologies are being improved; their effectiveness largely depends on the intensification of reagent treatment. In addition to generally accepted laboratory studies of the reagents used in water treatment, it is necessary to conduct production tests to clarify the parameters of the health risk and toxicity of the transformation products formed during the water treatment process, as well as to study the effectiveness and safety of a set of reagents that together enter the water treatment process. The hygienic assessment of reagents should take into account the actual conditions of their use in drinking water supply practice, including further stages of water treatment. This concerns the assessment of the possible destruction of polymers during the production of composite reagents, the assessment of modifying additives included in their composition, the transformation of polymers in water during chlorination, chloramination, ozonation, under the influence of ultraviolet irradiation, and adjustment of a set of mandatory controlled indicators. To conduct these studies, laboratories must have publicly available analytical methods that allow accurately determining the presence of monomers, polymers, as well as various additives and transformation products in concentrations actually present in drinking water.","PeriodicalId":13009,"journal":{"name":"Hygiene and sanitation","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139256630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research and assessment of the molybdenum oxide (VI) nanoparticles toxiсity under inhalation in WISTAR line rats in comparison with the micro-sized chemical analog","authors":"M. Zemlyanova, N. Zaitseva, M. Stepankov","doi":"10.47470/0016-9900-2023-102-10-1119-1124","DOIUrl":"https://doi.org/10.47470/0016-9900-2023-102-10-1119-1124","url":null,"abstract":"Introduction. Molybdenum (VI) oxide nanoparticles (MoO3 NPs) are being actively introduced into practical use as part of catalysts, optics, plastics, textiles, coatings, and lubricants, gas sensors, and crude oil refining processes. MoO3 NPs are known to exhibit toxic properties when interacting with living systems. Atmospheric air pollution with potentially dangerous MoO3 NPs can contribute to the inhalation exposure in the population and, as a result, the development of health disorders caused by the toxic effect of the nanomaterial. In this regard, the study of the adverse effects caused by MoO3 NPs entering the body during aerogenic exposure is particularly relevant. The aim of the study. Investigation and evaluation of subacute toxicity of MoO3 NPs by the inhalation route of entry into the body in comparison with a microsized chemical analogue. Materials and methods. The physical properties of MoO3 NPs were studied in comparison with microparticles (MPs). In an experiment on Wistar rats, a comparative analysis was performed and a characteristic of the pathogenetic features of the toxic effect of particles during subacute inhalation exposure at a concentration of 1.84 mg/m3 was given. Results. According to the totality of physical properties, the MoO3 sample under study is a nanomaterial with an average particle size of 58.8 nm, constituting 84.2% of the total number of particles. MoO3 NPs accumulate in the heart, lungs, kidneys, and brain. The concentration of molybdenum is by 2.50–15.85 times higher than the control levels. The highest content of the studied element was found in the lungs. Bioaccumulation of MP MoO3 was noted only in the lungs, while the concentration of molybdenum is by 3.00 times less in comparison with the exposure to NPs. When exposed to MoO3 NPs, more pronounced changes in biochemical (an increase in the activity of alkaline phosphatase, LDH, the concentration of total bilirubin and creatinine by 1.29–2.11 times) and hematological parameters (a decrease in the number of platelets and thrombocrit by 1.2 times) of blood were noted relative to the impact of a microscale analogue. Under the influence of NPs and MPs of MoO3, pathomorphological changes develop in the lungs, brain, and liver tissues. When exposed to NPs, compensatory lung emphysema, focal microvesicular steatosis in hepatocytes, and acute plethora in the liver were found, which were not detected during exposure to NPs. Limitations. The study was performed only with subacute inhalation exposure to NPs and MPs of MoO3 in Wistar rats. Conclusion. MoO3 NPs have a higher degree of bioaccumulation and toxicity relative to MPs. The results of the study make it possible to expand theoretical concepts and gain new knowledge in the field of nanotoxicology about the features of the toxic effect of nano-sized MoO3 with multiple inhalation routes of entry into the body at a concentration of 1.84 mg/m3. Compliance with ethical standards. The study was car","PeriodicalId":13009,"journal":{"name":"Hygiene and sanitation","volume":"32 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139257934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Proteomic profiling of blood plasma in chronic experimental exposure to aluminum oxide as a tool for predicting adverse effects from critical human organs and systems","authors":"M. Zemlyanova, E. V. Peskova, M. Stepankov","doi":"10.47470/0016-9900-2023-102-10-1125-1131","DOIUrl":"https://doi.org/10.47470/0016-9900-2023-102-10-1125-1131","url":null,"abstract":"Introduction. Highly informative research methods, which include proteomic profiling, make it possible to predict the development of negative effects on the part of critical human organs and systems at the earliest stages of their formation. In combination with toxicological studies, these methods allow changes in the protein profile of blood plasma, identified in the experiment on biological models, to be extrapolated to humans. Determination of the expression, functional characteristics and tissue identity of altered proteins and peptides provides clarification of the mechanisms of homeostasis disorders at the cellular and molecular level associated with exposure to chemicals. The purpose of the work is to identify and evaluate changes in the proteomic profile of blood plasma during experimental exposure to aluminum oxide in order to predict negative effects on the part of critical human organs and systems. Materials and methods. When modelling inhalation exposure to aluminum oxide at a dose of 0.0025 mg/(kg·day), equivalent to the dose in natural exposure conditions with an annual averaging period, and taking into account interspecies dose transfer, in an experiment on Wistar rats, the content of this metal in urine and a comparative analysis of the proteomic profile of the blood plasma of exposed and unexposed individuals was carried out. Using the methods of statistical and bioinformatic analysis, the data obtained in the experiment were extrapolated to humans in order to predict negative effects on the part of critical organs and systems during chronic aerogenic exposure to aluminum. Results. With chronic inhalation intake of aluminum oxide at a dose of 0.0025 mg/(kg·day) in animals of the experimental group, the content of aluminum in the urine was 3.5 times higher than that in the control group. As a result of densitometric measurement and comparative analysis of proteomic maps of blood plasma of exposed and unexposed animals, 13 protein spots were found, the intensity of which significantly differs between groups, which was proved to be related to the aluminum content in the urine. When comparing the mass spectra of these protein spots, 8 proteins were identified that coincided with the proteins of the library mass spectrum (Actin-binding Rho-activating protein; Aldehyde dehydrogenase, cytosol 1; Apolipoprotein A-I; Sec22b protein transporting vesicles; Elongation factor 1-γ; Neurosecretory protein Vgf; Pumilio homologue 3; Teneurin-2). As a result of bioinformatics analysis, there were determined genes encoding the identified proteins, their participation in biological processes (cellular and metabolic processes, biological regulation processes) and tissues of organs in which they have an increased expression (liver, brain, heart, muscles, small intestine, spleen, uterus, testicles, adrenal glands). In humans, orthologues of established genes have been identified, which makes it possible to use the proteins identified in the ex","PeriodicalId":13009,"journal":{"name":"Hygiene and sanitation","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139256965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Work intensity and work modification amid implementation of anti-epidemic activities","authors":"P. Shur, D. N. Lir, V.B. Alekseev, A. O. Barg, Ilia Vindokurov, E. V. Khrushcheva","doi":"10.47470/0016-9900-2023-102-10-1069-1077","DOIUrl":"https://doi.org/10.47470/0016-9900-2023-102-10-1069-1077","url":null,"abstract":"Introduction. Assessment of work intensity (WI) is challenged by several methodical complications. It may involve certain underestimation of an actual hazard category of working conditions and fails to consider work modification. Materials and methods. The study relies on using analytical, sociological, and statistical methods. To test the selected approach, a sample was created from workers with mostly mental work (n=137, 77% females). Their average age was 43.9±8.0 years; average work experience was 14.5±3.7 years. Results. In this article, we suggest certain approaches to assessing WI. They include self-assessment of a factor using a specifically designed questionnaire; they clarify indicators that describe WI; when assessing working conditions, they rely on matrices of interrelated indicators. This procedure makes it possible to estimate levels of individual components and create an integral WI profile as well as identify contributions made by various intensity types to its overall structure. When testing the procedure, we established workers with mostly mental work to tend to have harmful working conditions as per WI factor (the hazard category 3.1 in 24.8% of the cases; 3.2, 56.9% of the cases; and the hazard category 3.3 in 17.5% of the cases). Mental (28.6±6.1%) and sensory (24.0±7.0%) loads are limiting components. Amid implementation of anti-epidemic activities, work regime was established as the most sensitive WI component (its contribution grew from 11.1±6.0 to 16.0±5.7%, p<0.05). Working conditions moved to a higher hazard category for 35.8% workers. Limitations. Assessment of working conditions uses threshold values introduced more than 30 years ago and can be adjusted for the existing employment conditions. The testing was accomplished on a rather small sample, which was biased as per gender and included workers with different occupations and positions. Conclusion. The suggested approaches offer wider opportunities to assess working conditions as per WI with respect to some occupations. This may substantiate a list of indicators that should be regulated by the existing sanitary legislation. Investigation of possible modification of factors during the pandemic makes it possible to describe eligibility of anti-epidemic activities without any deterioration of working conditions.","PeriodicalId":13009,"journal":{"name":"Hygiene and sanitation","volume":"13 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139259146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}