Influence Of Stress Factors Research Articles

Traumatic Childbirth and Birth-Related Post-Traumatic Stress Disorder in the Time of the COVID-19 Pandemic: A Prospective Cohort Study.

Birth-related post-traumatic stress disorder occurs in 4.7% of mothers. No previous study focusing precisely on the stress factors related to the COVID-19 pandemic regarding this important public mental health issue has been conducted. However, the stress load brought about by the COVID-19 pandemic could have influenced this risk. We aimed to estimate the prevalence of traumatic childbirth and birth-related PTSD and to analyze the risk and protective factors involved, including the risk factors related to the COVID-19 pandemic. We conducted a prospective cohort study of women who delivered at the University Hospitals of Geneva between 25 January 2021 and 10 March 2022 with an assessment within 3 days of delivery and a clinical interview at one month post-partum. Among the 254 participants included, 35 (21.1%, 95% CI: 15.1-28.1%) experienced a traumatic childbirth and 15 (9.1%, 95% CI: 5.2-14.6%) developed a birth-related PTSD at one month post-partum according to DSM-5. Known risk factors of birth-related PTSD such as antenatal depression, previous traumatic events, neonatal complications, peritraumatic distress and peritraumatic dissociation were confirmed. Among the factors related to COVID-19, only limited access to prenatal care increased the risk of birth-related PTSD. This study highlights the challenges of early mental health screening during the maternity stay when seeking to provide an early intervention and reduce the risk of developing birth-related PTSD. We found a modest influence of stress factors directly related to the COVID-19 pandemic on this risk.

Investigation of the influence of hyperthermia and soil pollution with the petrochemicals on test objects using the method of mathematical planning

Purpose. To increase the efficiency of using methods for assessing the level of soil contamination by oil products against the background of the influence of other factors. Methodology. The authors consider the possibility of using bioassays to study the impact of several stressors on the test system. Based on the theory of experiment planning, a methodology for researching the influence of hyperthermia and soil contamination with kerosene on the growth parameters of test objects was developed. On the basis of the obtained experimental data, regression models were built which allow finding a numerical estimate of the impact of stress factors on changes in the characteristics of the test object. Findings. It was determined that, as a rule, in order to assess the influence of stressful factors when normalizing the assumed levels of their influence on humans and ecosystems using biotesting methods, such an assessment is carried out for individual factors. But, in the real conditions of existence of plants and organisms, they are exposed to the simultaneous influence of many factors that can interact non-additively, i.e. as antagonists or synergists. In order to increase the efficiency of the use of methods for biotesting of the level of soil contamination by oil products against the background of the influence of other factors, the authors applied one of the methods of mathematical planning of the experiment. It was concluded that the effect of one factor depends, to a certain extent, on the effect of the other factor, the effect of which was studied in the work. The fact of the non-additive effect of the factors used in the experiment makes it possible to recommend the use of test objects in the practice of monitoring the condition of soils in technogenically loaded territories previously exposed to the action of hyperthermia. Originality. The toxic effect of the petroleum product depends, to a certain extent, on the effect of hyperthermia. Pretreatment of the test objects with a hyperthermic factor in a hormesis dose had a preventive effect, increasing the resistance of the test objects to the effect of the petroleum product. Practical value. The fact of the non-additive effect of the factors used in the experiment makes it possible to recommend the use of test objects previously exposed to the action of hyperthermia for monitoring the condition of soils in technogenically loaded territories.

Research of Lipid Metabolism Disorders in Female Combatants

The objective: to find out the peculiarities of stress-induced changes in lipid metabolism indicators in women who have experienced concussion during combat operations. Study the state and morphostructure of adipose tissue. To analyze the relationship between lipid metabolism disorders and changes in reproductive health of female combatants. Materials and methods. The research was conducted at the Department of Obstetrics, Gynecology and Reproductology of the Ukrainian State Institute of Reproductology of the Shupyk National Healthcare University. 118 women participated in the study. Group I consisted of examination data of women who suffered concussion during combat operations with PTSD, group II – control, it consisted of healthy women. Average age of women who participated in hostilities and suffered contusion 27.08±4.23 years. Results. The influence of stress factors associated with military service in women servicemen on the development of lipid metabolism disorders is obvious. In the main group (118 women), blood cholesterol levels were significantly higher than in the control group. In parallel, a very low level of anti-atherogenic lipoprotein fractions was detected. Lipid metabolism in women who experienced concussion during combat with PTS was characterized by a high frequency of hyperlipidemia of types IIa and IIb, higher serum concentrations of atherogenic lipids fractions (CL, CL-LDL) and low anti-atherogenic fractions (CL-HDL), which were observed in all age subgroups and progressed with age. Conclusions. As a result of lipid metabolic disorders, the prerequisites for the development of hyperproliferative diseases of the female reproductive system, early and severe atherosclerosis are created.

Effects of magnesium deficiency on stress manifestations in women of reproductive age with nonspecific vaginitis

Nonspecific vaginitis is one of the most common problems in women of reproductive age, which ranks first in the structure of gynecological diseases and tends to increase. It is known that one of the causes of nonspecific vaginitis is the chronic stress influence on a woman’s body. At the same time, not only the hormonal system changes, but there is also a deficiency of trace elements, especially magnesium. Aim. To study the effect of magnesium preparations on the clinical manifestations of stress in the complex treatment of nonspecific vaginitis in women of reproductive age. Materials and methods. 160 women were examined, who were divided into 2 clinical groups with subgroups: the main group – 94 (58.8 %) patients with nonspecific vaginitis, who received treatment according to developed clinical diagnostic algorithms and schemes. The comparison group included 66 (41.2 %) patients with nonspecific vaginitis, who received treatment according to known protocols. In the process of examining groups, the following methods of examination were used: general (collection of complaints and anamnesis, gynecological examination, assessment of microscopy of vaginal smears according to the Amsel, Nugent and Donders criteria), laboratory (serum levels of adrenaline, noradrenaline, cortisol, magnesium), questioning, statistical. Results. The use of magnesium preparation according to the scheme in the main group significantly reduced the symptoms of anxiety and depression, normalized the blood magnesium level in contrast to the comparison group (Р < 0.05). Conclusions. In women of reproductive age, suffering from nonspecific vaginitis, who are constantly under the influence of stress factors, a deterioration in the psycho-emotional state is determined in the form of anxiety and depression of varying severity, as evidenced by the results of the Hospital Anxiety and Depression Scale (HADS). In addition, in such women, there is an increase in the levels of stress hormones (adrenaline, noradrenaline, cortisol), a decrease in the blood magnesium level in contrast to the indicators in healthy individuals. The use of magnesium preparation according to the scheme in the complex treatment of nonspecific vaginitis in women of reproductive age with chronic stress normalizes the blood magnesium levels, significantly improves the psycho-emotional state, reduces the symptoms of anxiety and depression and significantly improves the direct results of treatment.

Peculiarities of behavior and reactions of students of higher education in physical culture and sports under the influence of crisis phenomena

In the conditions of military operations on the territory of Ukraine, a significant part of the population was under the influence of stress factors of combat activity. An important area of research is the detection of reactions to crisis phenomena of various population groups, in particular, student youth. The purpose of the article was to investigate the behavior and reactions of students of higher education institutions in physical culture and sports under the influence of crisis phenomena caused by hostilities in the country. Research methods: questionnaires, statistical analysis. 218 students of the National University of Ukraine on Physical Education and Sport took part in the study. The average age of the respondents was 21 years. The majority of students, 63.8%, experienced negative experiences as civilians, 33.3% as volunteers, and the remaining 3.8% as military personnel, while continuing an active lifestyle (43.1%). General anxiety, aggressiveness and depressive states were found to be statistically significantly more characteristic of female students (p<0.05), while mood swings are characteristic of students in conditions of long-term continuation of crisis phenomena regardless of gender (p>0.05). At the same time, the intensity of combat stress in students does not depend on their location during active combat operations (p>0.05). Systematic exercise can affect the psycho-emotional state of students under the influence of crisis phenomena.

Studying the Influence of Stress Factors on the Bar Surface Quality during Rolling in Roughing Train

Studying the Influence of Stress Factors on the Bar Surface Quality during Rolling in Roughing Train

Стрессоустойчивость и молочная продуктивность крупного рогатого скота Урала в зависимости от технологии доения

Abstract. In modern conditions of intensification of the agro-industrial complex of our country, the level of influence of stress factors on the indicators of dairy productivity of cattle is an urgent topic for research. According to scientists, the stress resistance of the animal body is characterized by a number of hormones, such as prolactin, adrenocorticotropic hormone and cortisol. The scientific novelty lies in the study of the level of stress resistance of cattle with the use of intensive technologies. The purpose of our research work was to analyze the indicators of stress resistance and dairy productivity of cattle in the Urals, depending on the milking technology. Research methods. Scientific work was carried out in breeding herds of black-and-white cattle in the period 2016–2019 on the basis of agricultural enterprises of the Tyumen and Sverdlovsk regions. Distributing the evaluated heifers by types of stress resistance, the level of hormones in their blood was determined during the first lactation in the laboratory using STEROIDIF tests. Results. As a result of the analysis, it was found that in the groups where milking was used in the milk pipeline, animals with a high type of stress resistance had 22.6 % more heads compared to the groups of robotic milking. At the same time, it was noted that the first heifers with an average type of stress resistance during milking by a robot milker are a quarter more than in groups of cows when milking in a milk pipeline. Consequently, the first heifers adapt better to robotic milking. Milk yield is higher for first-time heifers milked with the help of a robot milker compared to linear milking. The difference in this case was more than 700.0 kg (17.3 %) in the studied herds. We recommend that when selecting first-calf cows for intensive milking in breeding herds of the Urals, along with generally accepted assessment indicators, the level of stress resistance of animals should be evaluated.

Intelligent Processing of Data From Chlorophyll Fluorometric Sensors

Introduction. Chlorophyll fluorescence induction (CFI) is a monitoring method of plant objects. CFI is a radiation of chlorophyll in red spectrum during a chlorophyll lighting of alive plant in blue spectrum. Chlorophyll fluorometers – the special devices that are used for measurement of CFI. Series of such devices were developed in V.M. Glushkov Institute of Cybernetics of the NAS of Ukraine. In particular, fluorometer «Floratest» and a network of wireless sensors were developed for CFI measurement. An accumulation of massive amount of measurements resulted into possibility to use intellectual methods like neural networks. The purpose of the paper is to research the possibilities of machine learning methods (neural networks, support vector machine (SVM), XGBoost algorithm) for analysis of CFI curves that were measured by means of sensors developed in V.M. Glushkov Institute of Cybernetics of the NAS of Ukraine. Results. Neural networks, SVM, XGboost ensure early detection of influence of stress factors on state of plants before appearance of external symptoms on plants that was showed on basis of data received during experiments with treatment of plants by herbicide. Analogically there was showed the possibility of using the machine learning methods for determination of soil humidity. The better methods for given tasks were determined. The study of possibilities to enhance the results of mentioned methods by means of normalization was conducted. The best results were demonstrated by z-score normalization and by minimax normalization to the range [-1;1]. Conclusions. The application of different machine learning algorithm for processing CFI curves demonstrated that SVM and XGBoost better suit for task of classification plants treated by means of herbicide. Neural network demonstrated worst results. The application mentioned methods for task of determination of artificial watering necessity demonstrated that neural network shows better result, SVM shows worse result and XGBoost shows worst result. Keywords: Chlorophyll fluorescence induction, neural network, support vector machine, algorithm XGBoost.

STUDYING THE RELATIONSHIP OF PSYCHOLOGICAL CHARACTERISTICS WITH THE LEVEL OF ADHERENCE TO TREATMENT OF PATIENTS WITH CHRONIC GASTRITIS

Abstract. Aim: to study the relationship between the level of adherence to treatment of patients with chronic gastritis and psychological characteristics and the severity of stress. Materials and methods. 302 patients with chronic gastritis (CG) were examined, which, de-pending on the level of adherence to treatment, were included in 4 groups: group 1 - 96 patients with HG associated with H.pylori (HP); in group 2 - 110 patients with chronic hepatitis not associated with HP. In patients of these groups, the compliance level was observed to be high. Group 3 was formed from 36 patients with CG associated with HP who refused treatment (low compliance), in group 4 - 60 patients diagnosed with CG associated with HP, who partially complied with the doctor's recommendations (moderate compliance). The data of the life history were analyzed, in particular, they were interviewed for the influence of stressful situations in everyday life and in the process of professional activity. The degree of adherence to treatment was assessed using the Davydov Compliance Questionnaire, anxiety levels (personal and situational) were determined using the Spielberger-Khanin questionnaire, anxiety and depression levels were determined using the Hospital Anxiety and Depression Scale (HADS). A correlation analysis was carried out to identify associations be-tween the level of patient’s adherence to treatment with the severity of the effect of stress factors on them and indicators of psychological status. Results. It was established that the maximum result of treatment - a high degree of eradication of the causative agent of CG was observed in patients of the first group. These patients fully complied with the recommendations of the doctor, at the same time, they were characterized by a lower frequency of exposure to stress. The minimum result of treatment was typical for pa-tients of the third group, which was due to their extremely low compliance. At the same time, these patients noted a high frequency of the influence of stress factors, at the same time they had relatively low levels of anxiety, assessed by the Spielberger and HADS questionnaires. The presence of statistically significant negative correlations of the average strength of the compliance level with the frequency of exposure to stressful life situations and professional stress, as well as positive associations of the compliance level with anxiety indica-tors, was established. Conclusion. The implementation of a set of measures, including correctly organized support for a patient with chronic gastritis, methods of psychological support based on the psychological characteristics of the patient, can increase the adherence of patients to the treatment, which, in turn, increases the frequency of effective eradication of Helicobacter pylori.

FEATURES OF PSYCHOLOGICAL SUPPORT OF MILITARY PERSONNEL WITH A HIGH LEVEL OF EMOTIONAL BURNOUT

The article presents the issue of emotional burnout among military personnel who are in combat operations. Features of psychological support of military and professional activities of servicemen with a high level of emotional burnout are described. Psychological support of servicemen includes: psychological counseling, psychotherapeutic assistance, educational activities, psychological trainings, among servicemen who have experienced psychological trauma and stress and professional provision of advisory assistance, diagnosis of servicemen with a high level of emotional burnout, provision of recommendations on evacuation from the extreme (combat) zone conditions In the system of ensuring the activities of the psychological service among military personnel, along with the organizational and legal direction, methodical support, in particular the introduction of various psychological technologies, primarily psychological ones that allow solving professional tasks, is of great importance. According to the tasks of psychological counseling, several psychoregulatory programs are distinguished: an educational program, where self-regulation methods are taught, a targeted program focused on the relief of neuropsychological tension, fatigue, the search for the body's resource capabilities, a general health program aimed at normalizing the condition and improving the health of the body. The effective performance of combat tasks is represented not only by professional training and physical capabilities of an individual, but also by his ability to show responsibility, independence, self-control, flexibility, the ability to make independent decisions and constructively interact with other members of the military team under the influence of stress factors and the implementation of professional tasks.

The specificity of the vitality of health care workers with professional deformations

Introduction. The influence of stress factors in the social and occupational spheres of life leads to deformations of the professional plan and a decline in the vitality in health workers (indicators of beliefs about oneself as a specialist and occupational environment, resistance to stressful professional situations, endurance, satisfaction from work and its results, involvement, self-confidence, control, professional self-development). The purpose of the study is to determine the specificity of the vitality of health care workers with occupational deformities. Material and methods. The survey of 6830 healthcare workers was executed, including 816 cases with pronounced deformations of a professional plan. We used a burnout questionnaire and its modification, a mental burnout questionnaire, three modifications of the vitality test (in order to obtain objective information when the subjects perceive the content of the statements of the questionnaires in various contexts, taking into account the performance of diagnostic procedures by the self-assessment method) and a test for resistance to life difficulties. Mathematical and statistical data processing included descriptive statistics, K. Pearson’s correlation test and the Chaddock table. Results. In health care workers, the dominance of depletion of the psychoemotional type is determined, determined by the above-average: deformation of the professional aspect, depletion of the psychoemotional nature, reduction components of the achievements of the personal and professional type and motivation of professional activity, as well as average: the distance of the personal and professional aspect and depersonalization criteria, affecting a tendency towards a lower average risk acceptance, reduced indicator of involvement, a decrease in the average value of resilience and resistance to life difficulties, a tendency towards an average indicator of control. Discussion. The results of studies by foreign and domestic doctors and psychologists confirm the need for diagnostics, prevention and correction of professional deformations and increasing the resilience of healthcare workers. Conclusion. The need for systematic diagnosis, prevention and correction of the components of deformations of the occupational plan of health workers is explained by the lowered indicators of involvement, resilience, control, risk acceptance and resilience to life’s difficulties.

The Influence of Stress Factors towards Psychological Well-Being among Part-Time Students at UiTM Shah Alam

The World Health Organisation (WHO) describes stress as "the reaction people may have when presented with demands and pressures that are not matched to their knowledge and abilities and which challenge their ability to cope." However, if stress is extreme and goes on for some time, it can turn to mental and physical ill-health. Oftentimes, obstacles and problems in life may easily cause stress among part-time students at UiTM Shah Alam. The psychological well-being of part-time students is very important as it brings an influence the performance of their work and study life. Thus, it is essential to study the influence of stress factors on psychological well-being among Part-Time Students at UiTM Shah Alam. The framework for the study is adopted from Kawano Yuri (2008) use as an independent variable to measure the main factor of stress, which is work stress, family stress, academic stress, financial stress, and self -efficacy while the dependent variable is the student psychological well-being towards the stress factors. A total of 216 respondents were selected using a stratified sampling technique which focused on a group of Part-Time Students who currently studied at UiTM Shah Alam. A complete set of questionnaires using a concept adapted and adopted from Rift (2004) was sent to respondents via WhatsApp and other social media platforms due to pandemic covid-19 constraints. All the data collected were analyzed using SPSS version 26. Based on the findings discovered that all the five dimensions of stress factors, namely work stress, family stress, academic stress, financial stress, and self-efficacy were found to have positive relationships with psychological well-being (r=.179, p, p<0.01; r=.443, p<0.01; r=.875, p<0.01; r=.172, p<0.01, r=.345, p<0.01 respectively). These positive relationships indicated that the greater the work stress, family stress, academic stress, financial stress, and self-efficacy, the greater it will impact psychological well-being among part-time students. Furthermore, the finding of the study also revealed work stress become the most influential dimension of stress factor among part-time students in UiTM Shah Alam (?=0.995, p<0.00). However, the other three dimensions of family stress, financial stress, and self-efficacy do not have an influence on psychological well-being among part-time students whereas academic stress was found to have a negative influence on the psychological well-being among part-time students (?=- 0.214, p>0.02). Therefore, it was discovered that only two out of five dimensions of stress factors acted as predictors towards psychological well-being among part-time students in UiTM Shah Alam. The study concluded that a better understanding of the issues of stress by the universities would provide some insights on how they can assist the part-time students in dealing with the stress, thus enabling the students to increase their performance in work and study.

INTRODUCTION OF NEW VARIETIES OF LARGE-FRUITED REMONTANT STRAWBERRIES IN THE FOREST-STEPPE OF WESTERN SIBERIA

The authors presented the results of the influence of stress factors on the yield of garden strawberry remontant large-fruited. Phenological and morphological observations, recording and evaluating the quality of the obtained fruits were carried out during the research. Varieties of remontant strawberries with a complex of economically beneficial features were identified. There were features as high yield, winter hardiness, resistance to major diseases and pests were presented. The obtained data confirmed that the highest productivity per bush showed varieties bearing fruit during the entire growing season: Selva - 376.06g, Vima Rina - 411.27g, Remontant large-fruited (hybrid) - 425.42g.

DETECTION OF VIABLE BUT NONCULTURABLE BACTERIA CELLS IN MEAT PRODUCTS

In foods, after bacteriological analysis, dangerous food pathogens are not detected, which can cause foodborne diseases. This is due to the formation of viable but nonculturable cells (VBNC) by contaminant bacteria under the influence of stress factors, which leads to false-negative results in microbiological expertise. The paper presents data on the presence of VBNC in finished meat products and after experimental contamination of VBNC pathogens. Due to the biohazard nature of such dormant cells, the authors propose to regulate the testing of food products for the presence of VBNC.

THE EFFECT OF GLUCOSE AND SUCROSE ON THE PHOTOSYNTHETIC PIGMENTS CONTENT IN ARABIDOPSIS THALINA UPON HEAT STRESS

An increase in the Earth's average temperature has a negative effect on the development, growth and productivity of cultivated plants. One of the main metabolic damages caused by exposure to elevated temperatures is excessive production of reactive oxygen species (ROS). ROS, accumulating in chloroplasts, cause significant damage to the photosynthetic apparatus of plants, destroying the chloroplast membrane and damaging pigments. Carbohydrates play a key role in the regulation of the processes of photosynthesis, respiration, seed germination, flowering and aging of plants. Carbohydrates are chemical signaling and sensitive molecules that receive a specific signal under normal conditions and under the influence of stress factors. The aim of our work was to study the effect of exogenous sucrose and glucose on the content of photosynthetic pigments in A. thaliana plants under the influence of heat stress. Two lines of arabidopsiswere used for research: wild-type plants and cat2cat3 knockout line with lacking isoforms of catalase, the main antioxidant enzyme. The plants were grown under conditions of 16-hour daylight at a constant temperature of + 28º C, air humidity of 70% and illumination of 2.5 kL. Treatment was perfomed in the dark for 2 and 4 hours at temperatures of +37 (moderate stress) and +44°C (severe stress treatment). Contorl Plants were incubated in a potassium-phosphate buffer without the addition of sucrose and glucose at a temperature of +20° C. It was shown that the content of chlorophyll a, b and carotenoids in intact plants of the wild type and the knockout line was the same. Under the influence of heat stress, the content of the studied pigments in the presence of sucrose did not change in both lines. During heat stress in the presence of glucose, changes were noted during the 4-hour stress. It was shown that in the control plants incubated at room temperature in the presence of glucose, the content of chlorophyll a and carotenoids increased in wild type. Upon severe heat stress (+44°С), a decrease in the pigment content was jbserved. The data obtained indicate that in conditions of 4 hours of heat stress, exogenous glucose is involved in the plant cell stress response. No changes in the content of chlorophyll and carotenoids were observed in knockout line cat2cat3.

СЕМЕННАЯ ПРОДУКТИВНОСТЬ И АДАПТИВНОСТЬ СОРТОВ ЛЮПИНА БЕЛОГО В УСЛОВИЯХ ЦЕНТРАЛЬНО-ЧЕРНОЗЕМНОГО РЕГИОНА

In field experiments for four years (2019–2022) in the conditions of the northern part of the Central Chernozem region, the productivity components of different varieties of white lupin (Lupinus albus L.) were determined and presented in the article Dega, Delta, Start, Manovitsky, Timiryazevsky and Gana, the varieties of breeding of Russian State Agrarian University – Moscow Timiryazev Agricultural Academy, were studied. Cultivation of high-yielding and high-protein varieties of white lupin increases the production of vegetable protein up to 15 c/ha (with a similar yield in grain crops, the protein harvest is four times lower). Thanks to nitrogen fixation, its production is possible without the cost of expensive nitrogen fertilizers, which is also beneficial in energy and environmental aspects. In addition, white lupin is able to assimilate phosphates that are difficult to dissolve. The influence of stress factors related to weather changes at different stages of vegetation on the variability of plant seed productivity parameters has been determined. The varieties of white lupine with determinant type of growth bred in Russian State Agrarian University – Moscow Timiryazev Agricultural Academy were characterized by a high level of adaptive potential to moisture deficiency (drought) and heat stress. The biological yield of the varieties was high, averaging 529, 573, 483, 564 g/m2 in 2019, 2020, 2021 and 2022, respectively. The share of the main stem in seed yield by year was 85, 74, 78, 88%. The coefficient of variation on the main shoot (V%) averaged 4.9% in varieties, 11.8% in years. On lateral shoots it was three times higher.

Study of Endogenous Paramagnetic Centers in Biological Systems from Different Areas

Plant leaves (Eldar pine (Pinus eldarica M.), fig (Ficus carica L.), and olive (Olea europaea L.)), collected in territories with different ecological conditions, of the Absheron Peninsula (Azerbaijan Republic) were studied by electron paramagnetic resonance spectroscopy (EPR). The generation of nanophase iron oxide magnetic particles in biological systems under the influence of stress factors was revealed. It was found that the process of biomineralization plays a role in the formation of biogenic iron oxide magnetic nanoparticles in plants and the generation of magnetite crystals in biological tissues, and stress factors have a stimulating effect on this phenomenon.

Антиоксидантная активность пшеницы озимой при обработке биопрепаратом Нигор++

The influence of stress factors on the plant can lead to deterioration of plant functioning and loss of yield. The use of biological preparations based on plant cell elicitors in the technology of grain cultivation makes it possible to regulate the antioxidant activity of plants under abiotic stress. Treatment with the biopreparation Nigor++ in the tillering phase leads to noticeable changes in the balance of antioxidant substances in winter wheat plants Moskovskaya 39. Repeated treatment of Nigor++ after 16 days in the earing phase reduces AOA by 21.8, and by the flowering phase leads to a drop in this indicator by 51% relative to the tillering phase and by 59% relative to control plants. The use of Nigor++ increases the immune status of plants, reduces the concentration of antioxidant substances or reduces their activity due to the formation of stable complexes with magnesium ions included in BP, as well as binding them to highly active free radicals that occur during autoxidation, converting them to low-activity. Keywords: ANTIOXIDANTS, BIOLOGICAL PRODUCTS, WINTER WHEAT, ANTIOXIDANT ACTIVITY, REACTIVE OXYGEN SPECIES, ELICITORS, BIOFLAVONOIDS

Burnout syndrome in dentists. Literature review

The problem of the development of emotional burnout syndrome in dentists is one of the most urgent problems of modern medicine. Currently, the authors do not have a single point of view on the essence of emotional burnout. Emotional burnout affects both the doctor and the patient. The solution to this problem requires further research.&#x0D; Objective. Based on the literature data, to identify the main factors of the development of emotional burnout of dentists, to analyze the existing strategies for overcoming stress and to determine which of them are applicable in the work of a dentist.&#x0D; Methods. The search for literature sources was carried out in three databases (e-library, PubMed, Web of Science) according to the keywords: “burnout syndrome in dentistry”, “burnout in dentistry”, “emotional stress in dentistry”, “strategies for overcoming stress in dentistry”, “coping strategies in dentistry”, “emotionally charged situations in dentistry”. 130 literary sources were analyzed. Criteria for inclusion: literature reviews, research, and articles on the personal point of view of specialists on the problem of emotional burnout, and on strategies for coping with stress in certified dentists. Exclusion criteria: articles on emotional burnout, stress, and depression in dental students.&#x0D; Results. Based on the analyzed literature on the topic of the development of emotional burnout syndrome in dentists, there is no single point of view on the essence of emotional burnout. Some authors consider it as a type of stress, othersthe result of the influence of stressful factors, against which pathological processes develop, such as: headache, problems of the cardiovascular system, exacerbation of chronic diseases, pain in the spine. The psychological state of burnout can adversely affect a person’s health, family relationships, and service interactions.&#x0D; Conclusion. This paper presents the main approaches to determining the essence of the burnout syndrome, a systematic analysis and generalization of materials on the problem in the professional activities of dentists. Emotional burnout affects both the doctor and the patient. The solution to this problem requires further research.

DEVELOPMENT OF A USER CLASSIFICATION METHOD ACCORDING TO THE LEVEL OF STRESS RESISTANCE USING A MODIFIED AUTO-ASSOCIATIVE NEURAL NETWORK

The work is aimed at solving a relevant for Ukraine and the world scientific and applied problem – the development of methods and means of constructing a psychophysical portrait of man to determine its stress resistance. For a number of professions, special methods of selecting personnel for special abilities are needed. Such abilities (qualities) include: health; motivation and will to act decisively, with the maximum effort of their physical, intellectual and psychological capabilities; physical training; level of mastery of technical means (or other means necessary in a critical situation); temperament; nature; emotional condition; accumulation of fatigue during the task and others. The article develops a method for classifying users according to the level of stress resistance on the basis of a modified auto-associative neural network using the Fletcher – Reeves algorithm. There are several ways to classify stress responses, but a more obvious study is to divide them into behavioral, intellectual, emotional and physiological manifestations of stress. The main signs of behavioral stress are psychomotor disorders (excessive muscle tension, winter breathing rhythm), lifestyle changes (changes in daily routine, sleep disturbances), occupational disorders (decreased productivity, increased fatigue), impaired social role functions, increased conflict, increasing aggression, etc.). In conditions of constant influence of stress factors on human consciousness, the decision can be ill-considered and made under the influence of emotions. To avoid such a situation in the workplace, the head of the company must monitor the condition of the operator. This human operator stress assessment system has been developed to predict human operator stress. The main task of the model is to predict based on the obtained parameters of the human condition (stress or not). Additional testing was added to increase the model’s performance based on input data on physical parameters, gender, age, height, and bad habits. The purpose of testing is to increase the accuracy of model prediction. Data from 92 respondents with 1180 records were selected for testing. Data set division: testing – 20 %, training / verification – 80%. The best results were achieved with the help of our own developed neural network based on Keras. Also in the paper the implementation of decision-making methods, the method of k-nearest neighbors and the modified auto-associative network was presented.