On some systems of difference equations

The work studies some Difference equations, which are connected with Mejer's function.Comment: 5 pages, 0 figures, extraction of my talk on the International Conference in memory of Professor N.M.Korobo

Survival through networks: the 'grip' of the administrative links in the Russian post-Soviet context

© 2014 Taylor & Francis. Based on an analysis of the post-Soviet transformation experience of four defence sector organizations in a Russian region where the defence sector occupies a substantial part of the local economy, this article develops a typology of network relationships: Grooved Inter-relationship Patterns (Gr’ip) networks and Fluid Inter-relationship Patterns (Fl’ip) networks. This typology can be applied to a range of transition/emerging market and low system trust contexts. Gr’ip networks, in this case, represent the persisting legacy of the Soviet command-administrative system. Fl’ip networks are here an attempt by the defence companies to link into the civilian supply chains of a developing market economy. This article argues that Gr’ip networks had and still have a crucial role to play in Russian enterprises’ survival and development

Changes in the oxidative-antioxidant status of blood in freestyle wrestlers under the influence of physical exertion

Purpose of the study: to evaluate the “lipid peroxidation-antioxidant protection” system in freestyle wrestlers under the influence of intense physical activity in order to identify the nature of oxidative processes and the antioxidant status of the athletes’ body.Materials and methods: the study involved athletes — freestyle wrestlers, boys 18–22 years old, with sports qualifications: candidate master of sports or master of sports, regularly involved in freestyle wrestling. The control group consisted of students who did not have a sports category and were not involved in sports activities, comparable in gender, age, weight category with the comparison group.  The material for the study was plasma and red blood cells. Blood sampling from athletes was carried out twice, at the end of the preparatory and competitive periods, in the morning, on an empty stomach from the ulnar vein, in accordance with generally accepted requirements. Components of lipid peroxidation and antioxidant defense were determined using spectrophotometric and fluorometric methods.Results: it was found that in athletes after intense physical activity (competitive period), there is a significantly significant decrease in substrates with double bonds by 61 %, primary products by 59 % and intermediate products by 44 %, an increase in the final products of lipid peroxidation by 25 % against the background of inhibition activity of antioxidant protection components: retinol by 40 %, superoxide dismutase by 7 % and reduced glutathione by 11 %.Conclusion: The level of free radical processes increases during physical activity due to the accumulation of oxygen in organs and tissues, and depends on the intensity and duration of the exercise. In the course of the study, it was established that the preparatory and competitive periods, in comparison with the control group, among freestyle wrestlers, depending on the previous level of physical activity, are characterized by activation of lipid peroxidation processes and inhibition of enzymatic and non-enzymatic components of antioxidant protection. The established changes are recommended to be taken into account when conducting comprehensive rehabilitation of athletes, when developing recommendations for improving the training process, as well as when using antioxidant complexes for athletes aimed at restoring various parts of the body’s antioxidant defense

Modern concepts of viral hepatitis (review of literature)

We conducted an analysis of Russian and foreign literature and an analysis of our researches on the problem of etiology and pathogenesis of viral hepatitis was showed. Viral hepatitis occupies a leading position among infectious disease. Chronic forms of viral hepatitis B and C is the most prevalent. Among them more than 60 % are registered in age from 20 to 39 years. In spite of the fact that pathogenesis, clinical aspects and chronization of these forms are different, they have the general processes in a liver. The changes of these processes of the general systems of an organism (such as the neuroendocrine regulation, lipid status and lipid peroxidation - antioxidant system) have the particular importance. Studying these variables under abnormalities of reproductive health in women with hepatitis is particularly topical

FEATURES OF ANTIOXIDANT SYSTEM STATE IN ADOLESCENTS OF EASTERN SIBERIA IN DEPENDS ON THEIR GENDER AND ETHNIC ORIGIN

This research is devoted to studying of features of antioxidant protection system in adolescent boys and girls of various ethnic groups of Eastern Siberia. Study of the peculiarities of processes of antioxidant protection of populations of people of different ethnicity, living in the same geographical conditions, is of undoubted scientific interest. It is especially important to assess metabolic status of a young, growing body to ensure in the future the preservation of reproductive ability. We biochemically evaluated 58 boys of 14-17 years old. Out of them 19 boys were Russian, 29 boys were Buryat population and 10 boys were metises. Also we biochemically evaluated 57 girls. Out of them 21 were Russian, 27 girls were Buryat population and 9 girls were metises. The materials for biochemical studies were blood serum and red cells. The total antioxidant activity of serum and the content of its components (superoxide dismutase, α-tocopherol, retinol, blood-reduced glutathione) were evaluatedbya spectrofluomphotometer «SHIMADZU-1501» (Japan). Statistical analysis was performed by parametric tests. The study was supported by grants of the President ofthe Council of the Russian Federation (Scientific School 494.2012.7). The detected features of antioxidant protection processes in observed adolescents had gender differences, also may be explained by their ethnicity and characterized by different degree of activity of metabolic processes in adolescent boys and girls of different ethnic groups of Eastern Siberia. Study the state of the antioxidant system of the organism can be used as an additional criterion for complex examination of practically healthy adolescents, which significantly enhance the representation about the adaptation possibilities of the organism to external conditions and can be a basis for effective monitoring of reproductive health in the future

THE CHANGES OF FUNCTIONAL ACTIVITY OF A THYROID AND METABOLISM OF THYROID HORMONES IN TEENAGED GIRLS IN DIFFERENT ETHNIC GROUPS OF EASTERN SIBERIA AS AN IMPORTANT COMPONENT OF LONG-TERM ADAPTATION TO EXTREME CLIMATIC AND GEOGRAPHICAL CONDITIONS OF LIVING

Girls and teenaged girls of different ethnic groups living in Tofalaria during different age period were examined. The aim of this research was to establish the peculiarities of functioning of pituitary-thyroid system and metabolism of thyroid hormones in healthy girls and teenagers living under adverse climatic and geographical conditions depending on their ethnicity. It was set that in ethnic Tofs girls and in Europoids girls in age group of 7-11 there were differences in the content of the active fractions of thyroid hormones testifying different mechanisms of maintenance of thyroid homeostasis. These differences remain in age group of 12-14, when changes in pituitary section of the system are added to them. The functioning of pituitary-thyroid system-level of neuro-endocrine regulation in native girls of Tofalaria of 15-18 goes in more economical way. This is actually the result of genetically determined long-term adaptation of natives' organism to extreme climatic and geographical environmental factors

Features of lipid peroxidation and antioxidant protection in Mongoloid men, carriers of non-functional polymorphisms of GSTT1 and GSTM1 genes, with different status of fertility

Background. Genetic factors cause 30-50 % of cases of male infertility different forms. We have conducted the investigation of the lipid peroxidation and antioxidant protection system components, associated with the biotransformation genes polymorphisms, in men with infertility. Aims: to study parameters of lipid peroxidation and antioxidant defense system associated with polymorphisms of biotransformation genes in infertile Mongoloid men. Materials and methods. The main group included 143 men of reproductive age from Mongoloid population who came to the Public Health Institution "Republican Perinatal Center" in Ulan-Ude with the problem of one year and more infertility after the marriage. Fifty-three almost healthy males with proven fertility were included in the control group. Blood samples of all men were genotyped by glutathione S-transferase (GSTP1, GSTM1, GSTT1) gene family and activity of glutathione system enzymes was determined. Results. In the fertile Mongoloids with non-functional genotype GSTT1(0/0)/GSTM1(0/0) we have established an increase concentration of a-tocopherol in serum, activity of glutathione peroxidase and a decrease in glutathione-S-transferase, as well as a decrease in the concentration of a-tocopherol. In infertile Mongoloids with non-functional GSTT1(0/0)/ GSTM1 (0/0) genotypes, an increase in the tiobarbituric acid reactants, glutathione peroxidase and a decrease in the concentration of a-tocopherol was found in the ejaculate; we also detected a decrease in the concentration of a-tocopherol, the level of oxidized glutathione and glutathione-s-transferase activity. Conclusions. Genetically determined peculiarities of functioning of the xenobiotic biotransformation system make each individual unique with regard to their adaptive capacity - resistance or sensibility to the damaging exo- and endogenous factors

Petri Net Plans A framework for collaboration and coordination in multi-robot systems

Programming the behavior of multi-robot systems is a challenging task which has a key role in developing effective systems in many application domains. In this paper, we present Petri Net Plans (PNPs), a language based on Petri Nets (PNs), which allows for intuitive and effective robot and multi-robot behavior design. PNPs are very expressive and support a rich set of features that are critical to develop robotic applications, including sensing, interrupts and concurrency. As a central feature, PNPs allow for a formal analysis of plans based on standard PN tools. Moreover, PNPs are suitable for modeling multi-robot systems and the developed behaviors can be executed in a distributed setting, while preserving the properties of the modeled system. PNPs have been deployed in several robotic platforms in different application domains. In this paper, we report three case studies, which address complex single robot plans, coordination and collaboration