Study Of Stress Resistance Research Articles

The divergence of DHN-derived melanin pathways in Metarhizium robertsii.

The important role of dihydroxynaphthalene-(DHN) melanin in enhancing fungal stress resistance and its importance in fungal development and pathogenicity are well-established. This melanin also aids biocontrol fungi in surviving in the environment and effectively infecting insects. However, the biosynthetic origin of melanin in the biocontrol agents, Metarhizium spp., has remained elusive due to the complexity resulting from the divergence of two DHN-like biosynthetic pathways. Through the heterologous expression of biosynthetic enzymes from these two pathways in baker's yeast Saccharomyces cerevisiae, we have confirmed the presence of DHN biosynthesis in M. roberstii, and discovered a novel naphthopyrone intermediate, 8, that can produce a different type of pigment. These two pigment biosynthetic pathways differ in terms of polyketide intermediate structures and subsequent modification steps. Stress resistance studies using recombinant yeast cells have demonstrated that both DHN and its intermediates confer resistance against UV light prior to polymerization; a similar result was observed for its naphthopyrone counterpart. This study contributes to the understanding of the intricate and diverse biosynthetic mechanisms of fungal melanin and has the potential to enhance the application efficiency of biocontrol fungi such as Metarhizium spp. in agriculture.

Study of Stress Resistance in Young Men Playing Computer Games (Using the Example of the Genres Shooter and MOBA)

The article presents research data on the stress tolerance of young men playing computer games of the genre first-person shooter and MOBA. Based on the results obtained,it is concluded that all young men have a high level of stress resistance. There were nodifferences in the level of stress resistance from the preferred genre of the game. Analysis ofthe results of the survey allowed to determine the time occupied by the game, which tendsto increase on certain days of the week. It is shown that the measures used by parents andlecturer, young people consider not effective, do not recognize dependence on the game, donot plan to change lifestyle in the near future.

On the question of stress resistance of future teachers at the stage of training at the university

The article presents an analysis of the phenomenon of stress and stress resistance in the scientific psychological and pedagogical literature. The problem of stress tolerance in the professional activity of a teacher-psychologist is considered. It is noted that the stress resistance of students in educational activities is a complex property of the individual, which is characterized by the necessary adaptation of the student to the influence of external and internal factors in the course of educational activities. The factors influencing the development of stress tolerance and a positive attitude to learning activities are considered. The article presents the results of an empirical study of stress resistance in future teachers-psychologists at the stage of training in higher education. The features of the perceptual assessment of students ’ stress resistance at the final stage of training are shown. It is established that graduates are able to clearly define the goals of their educational and professional activities and choose the best ways to achieve them. They are distinguished by the desire to cope with difficulties independently, the ability to analyze the difficulties encountered and overcome them, unlike first-year students. The study involved students of the 1st and 4th courses of the psychological and pedagogical direction, in the number of 128 people. The following methods were used: self-assessment of the stress resistance of S. Cowhen and G. Willianson, the questionnaire of the perceptual assessment of the type of stress resistance of N. P. Fetiskina, methods of mathematical and statistical processing of the obtained data: descriptive statistics, determination of the reliability of differences: the Fisher criterion. It is reliably established that graduates have a moderate type of stress resistance, and 1st-year students at the initial stage of training are characterized by moderate instability to stress.

Stress resistance of young students in the context of their interaction with religious communities

The article presents the results of the study of stress resistance of the student’s youth in the context of its interaction within their religious communities. It is assumed that in order to improve the psychological and the pedagogical process of shaping the stress resistance as an important life competency of schoolchildren, it is important to consider the influence on the students’ personalities and their well-being of their religious activities. It is speculated that stressful situations may be related to the learning process, interaction with peers / friends, y various relations within the family, extra-curricular activities, expectations about themselves and their future.
 Also, there is a greater range of circumstances in family relationships may appear stressful for students. It is noted that most students of different ages experience the feeling of stress in situations related to the process of learning and knowledge exams (test works, surveys, waiting for a knowledge exam during final assessments and the ITA. The same type of situations can be stressful for students of all ages and evoke strong emotions. However, there are numerous ways of dealing with them, which is largely related to social factors such as a religious community. There are dominant coping strategies, levels of the ability to withstand stress, features of behavior under stress, types of prerequisites of the resistance to it: 1) actively involved in the life of a religious community, 2) somehow involved in the life of the religious community, 3) not involved in life and activities of a religious community. It is concluded that the ability of students to cope with stressful experiences and be stressed out is conditioned by the degree of their inclusion in the life and activities of their religious community which gives a sense of support and hope, shows an example of resilience of an individual in stressful conditions.

Stress resistance of young students in the context of their interaction with religious communities

The article presents the results of the study of stress resistance of the student’s youth in the context of its interaction within their religious communities. It is assumed that in order to improve the psychological and the pedagogical process of shaping the stress resistance as an important life competency of schoolchildren, it is important to consider the influence on the students’ personalities and their well-being of their religious activities. It is speculated that stressful situations may be related to the learning process, interaction with peers / friends, y various relations within the family, extra-curricular activities, expectations about themselves and their future.
 Also, there is a greater range of circumstances in family relationships may appear stressful for students. It is noted that most students of different ages experience the feeling of stress in situations related to the process of learning and knowledge exams (test works, surveys, waiting for a knowledge exam during final assessments and the ITA. The same type of situations can be stressful for students of all ages and evoke strong emotions. However, there are numerous ways of dealing with them, which is largely related to social factors such as a religious community. There are dominant coping strategies, levels of the ability to withstand stress, features of behavior under stress, types of prerequisites of the resistance to it: 1) actively involved in the life of a religious community, 2) somehow involved in the life of the religious community, 3) not involved in life and activities of a religious community. It is concluded that the ability of students to cope with stressful experiences and be stressed out is conditioned by the degree of their inclusion in the life and activities of their religious community which gives a sense of support and hope, shows an example of resilience of an individual in stressful conditions.

In-depth investigation on abiotic stress-responsive differentially expressed genes in Arabidopsis roots through GEO database

ABSTRACT Abiotic stresses limit the plant growth and productivity. Plants have developed various responsive mechanisms to survive these adverse environmental conditions. To better understand plants how to adapt environmental stress, we retrieved the Arabidopsis root responsive genes related to eight abiotic stresses (salt, cold, drought, osmotic, UV, wounding, heat, and heavy metal stresses) from the Gene Expression Omnibus (GEO) database. After quantile normalization of microarray data, a robust rank aggregation (RRA) algorithm was applied to determine the differentially expressed genes (DEGs). The resultant 213 DEGs, including 139 up-regulated and 74 down-regulated genes out of more than 20,000 genes, were further analyzed by the integrated bioinformatics approaches of PUBMED, PANTHER, DAVID, and STRING. The results indicated that the up-regulated DEGs were more positively involved in response to oxidative stress, regulation of transcription, and structure organization than the down-regulated DEGs. The former also had more complicated PPI interactions than the latter. Furthermore, qRT-PCR and enzyme activity have been done to validate the outcome of integrated bioinformatics analysis. Our work will facilitate to demonstrate the common molecular mechanisms responsive to differential abiotic stresses and these DEGs might be potential biomarkers for future abiotic stress-resistance studies.

Role of stress in development of cardiovascular pathology in extreme professions

Psychoemotional stress is a risk factor for cardiovascular diseases, including arterial hypertension and coronary heart disease. Neurohumoral mechanisms are involved in the development of hypertensive reactions to stress. The severity of stress reactions depends on the stress resistance of people. The study of stress resistance is carried out in industrial sectors associated with the impact of professional psycho-emotional stress. Studies in locomotive drivers reveal a high level of cardiovascular disease. Stress helps to reduce vitamin D. Vitamin D deficiency helps reduce stress resistance. Studies conducted among locomotive drivers have revealed a high prevalence of vitamin D deficiency, requiring medical correction.

Исследование стессоустойчивости студентов технического университета

The article is devoted to the study of stress resistance of students of technical specialties. Features of the reactions of students to the circumstances of life are traced. The situations that complicate the stress state of students are indicated. The propensities of students to psychosomatic diseases are shown. Destructive methods of stress relief are considered. Constructive methods of overcoming stress are revealed. The level of stress resistance of students, which is within normal limits, but close to increased sensitivity to stress, is revealed.

Концепция динамического психобиологического гомеостаза и полиморфизм стрессоустойчивости как новый взгляд в психологии стресса

The article presents the results of a theoretical study of stress resistance, based on the analysis of modern ideas of foreign psychology. The aim of the study was to identify modern perspective approaches to the study of stress resistance for further interdisciplinary impacts. The characteristics of two types of stress tolerance ˗ “engineering” and “environmental” are presented. “Engineering stress tolerance” is associated with the restoration of the initial state of the body after the experienced stress. “Environmental stress tolerance” is characterized by the transition of the body to an alternative state. Explaining the existence of two forms of stress resistance opens up new perspectives in studies of stress psychology.

Identification of Sunflower (Helianthus annuus L.) Genotypes Tolerant to Water Stres

The present research was carried out to determine water-stress tolerance of linoleic sunflower genotypes (P64LE119, PR63F73, P64LL62) grown under different water stress conditions [no water-stress (I100); mild water-stress (I70); strong water-stress (I35)] in the years 2015 and 2016. Variance analyses revealed significant differences between the genotypes (P<0.01). As the average of two years, the greatest yield was obtained from no water-stress x genotype interaction (I100xP64LE119) with 4094.66 kg ha-1, the lowest yield was obtained from strong water stress x genotype interaction (I35xPR63F73) with 2487.81 kg ha-1. Again as the average of two years, the greatest chlorophyll content was obtained from no water-stress x genotype interaction (I100xP64LE119) with 49.83 spad, the lowest value was obtained from strong water stress x genotype interaction (I35xPR63F73) with 34.39 spad. The greatest crop water stress index was obtained from strong water stress x genotype interaction (I35xPR63F73) with 0.53, the lowest value was obtained from no water-stress x genotype interaction (I100xP64LE119) with 0.21. The P64LE119 genotype with optimum water use efficiency and prominent with crop water stress index and chlorophyll content both in no water-stress and strong water stress treatments was identified as water stress-resistant and the genotype was considered to have reliable characteristics potentially to be used in further water stress-resistance studies.

Study of Resistance to Stress and Burnout among Public Health Professionals: The Case of Nurses and Physicians at Ibn Sina Hospital in Rabat Morocco

Occupational stress presents a major public health problem. It is the subject of many works in Morocco and in the world. Our work focuses on the study of stress resistance among nurses and physicians working in services at Ibn Sina Hospital in Rabat, Morocco. The aim of this study is to analyze the relationship between resistance status, burnout and level of psychological distress. A self-questionnaire is provided to all respondents. It includes questions about socio-demographic and professional, clinical, also neuropsychological tests such as the stress resistance test (CTRS), the burnout scale (MBI) and the general health questionnaire (GHQ12). This study shows that 42% of nurses and physicians have a high level of emotional exhaustion, high level of depersonalization affects 49% of nurses and physicians and subjects with low professional achievement account for 67% and 54% of nurses and physicians suffer from psychological distress. The stress test reveals that 88% of subjects have a low or moderate level of stress resistance and only 12% have good resistance. Thus, our study sheds new light on the understanding of stress at work by using new measurement and evaluation methods such as TRS, with the aim of reducing or eliminating the impact of occupational stress in hospitals.

Use of Time Lapse Microscopy to Visualize Anoxia-induced Suspended Animation in &lt;em&gt;C. elegans&lt;/em&gt; Embryos

Caenorhabdits elegans has been used extensively in the study of stress resistance, which is facilitated by the transparency of the adult and embryo stages as well as by the availability of genetic mutants and transgenic strains expressing a myriad of fusion proteins(1-4). In addition, dynamic processes such as cell division can be viewed using fluorescently labeled reporter proteins. The study of mitosis can be facilitated through the use of time-lapse experiments in various systems including intact organisms; thus the early C. elegans embryo is well suited for this study. Presented here is a technique by which in vivo imaging of sub-cellular structures in response to anoxic (99.999% N2; <2 ppm O2) stress is possible using a simple gas flow through setup on a high-powered microscope. A microincubation chamber is used in conjunction with nitrogen gas flow through and a spinning disc confocal microscope to create a controlled environment in which animals can be imaged in vivo. Using GFP-tagged gamma tubulin and histone, the dynamics and arrest of cell division can be monitored before, during and after exposure to an oxygen-deprived environment. The results of this technique are high resolution, detailed videos and images of cellular structures within blastomeres of embryos exposed to oxygen deprivation.

An examination of stress hardiness, dysphoria, and anger among police recruits exposed to stressful police academy training

This study examined whether stress hardiness moderates the relationship between stress and anger during stressful police academy training. It was hypothesized that stress hardiness alters the strength of the relationship between stressful circumstances and anger. The study of stress resistance is an important area of study as stress has been linked to behavioral problems (e.g., absenteeism from work), emotional problems (e.g., depression), and physical problems (e.g., coronary heart disease).

The Staphylococcus aureus Alternative Sigma Factor ς B Controls the Environmental Stress Response but Not Starvation Survival or Pathogenicity in a Mouse Abscess Model

The role of sigmaB, an alternative sigma factor of Staphylococcus aureus, has been characterized in response to environmental stress, starvation-survival and recovery, and pathogenicity. sigmaB was mainly expressed during the stationary phase of growth and was repressed by 1 M sodium chloride. A sigB insertionally inactivated mutant was created. In stress resistance studies, sigmaB was shown to be involved in recovery from heat shock at 54 degreesC and in acid and hydrogen peroxide resistance but not in resistance to ethanol or osmotic shock. Interestingly, S. aureus acquired increased acid resistance when preincubated at a sublethal pH 4 prior to exposure to a lethal pH 2. This acid-adaptive response resulting in tolerance was mediated via sigB. However, sigmaB was not vital for the starvation-survival or recovery mechanisms. sigmaB does not have a major role in the expression of the global regulator of virulence determinant biosynthesis, staphylococcal accessory regulator (sarA), the production of a number of representative virulence factors, and pathogenicity in a mouse subcutaneous abscess model. However, SarA upregulates sigB expression in a growth-phase-dependent manner. Thus, sigmaB expression is linked to the processes controlling virulence determinant production. The role of sigmaB as a major regulator of the stress response, but not of starvation-survival, is discussed.