INVESTIGATION OF CHANGES IN THE STRUCTURE AND PROPERTIES OF COMPOSITE MATERIALS FROM ALLOYS D16, AMZ, 1420 WITH COLD SHEET ROLLING

В работе исследовано влияние режимов холодной прокатки на распределение и величину остаточных напряжений в толще листа многослойных композиционных материалов. Рассматривалось влияние скорости и трения на остаточные напряжения в толще листа. Исходными данными являлись горячекатаные листы алюминиевых сплавов Д16, АМц, 1420, предназначенные для дальнейшей холодной прокатки.The work investigated the influence of modes of cold rolling on the distribution and magnitude of residual stresses in the thickness of the sheet of multilayer composite materials. Considered the impact of speed and friction on residual stresses in the thickness of the sheet. The source data were the hotrolled sheets of aluminum alloy D16, AMC, 1420, designed for further cold rolling

Human and animal cells adhesion on the modified glass

2D matrix for cells cultivation has been created using ionic plasma processing of silicate glass. We have shown that the CD-I mouse hepatocytes are adsorbed on the modified and the control glass after 24 h cultivation. Number of these cells on the modified glass was 2.8-0.2 more as compared with that in control on a smooth glass. Human fibroblasts adsorbed on a modofied glass matrix had normal configuration and their number was 1.5 ± 0.5 times greater that the number of cells in the control of smooth glass matrix

Analysis of the quality of life and the level of social well-being among college students

The aim of the study – to evaluate the indicators of quality of life and social well-being among adolescents studying at a technical college.Цель исследования – оценить показатели качества жизни и социального благополучия среди подростков, обучающихся в колледже

Gene transfer to mice organs using non-viral systems for targeted delivery with different hydrophobicity and with lactose addressing group

Biodistribution of lipoplexes formed of cholenim substances I-III, containing one, two or three cholesterol moieties, and eukaryotic 14C-DNA and(or) reporter gene into mice organs using a variety of administration routes (intraperitoneally, i.p.; portal vein or left renal artery) is studied in this paper. It is shown that biodistribution doesn't depend on lipoplex lipid composition under i.p. administration, and depends on lipid nature under vein and artery administration. Effective in vivo transfection and reporter gene expression are demonstrated under portal vein administration of lipoplex formed of dicholenim II and lactosylated lipid IV (1 to 1 mass ratio). In the case, the β-Gal gene expression (above 0,3 mcg/g of tissue) is demonstrated in lungs, liver and spleen histochemically and spectrophotometrically. Introduction of cholesterol moieties into oligoethylenimine structure results in optimal hydrophilicity/hydrophobicity ratio, their stabilization, and optimal value of critical constant of micelle formation. There are certain outlooks due to usage of the lipoplexes described for targeted gene delivery

Characterization of Groups E6(3) and 2E6(3) by Gruenberg Kegel Graph

The Gruenberg Kegel graph (or the prime graph) Γ(G) of a nite group G is de ned as follows. The vertex set of Γ(G) is the set of all prime divisors of the order of G. Two distinct primes r and s regarded as vertices are adjacent in Γ(G) if and only if there exists an element of order rs in G. Suppose that L =≅ E6(3) or L ≅= 2E6(3). We prove that if G is a nite group such that Γ(G) = Γ(L), then G ≅= L. © 2021 Khramova A.P., Maslova N.V., Panshin V.V., Staroletov A.M. The work is supported by the Mathematical Center in Akademgorodok under the agreement 075-15-2019-1675 with the Ministry of Science and Higher Education of the Russian Federation.The work is supported by the Mathematical Center in Akademgorodok under the agreement No. 075-15-2019-1675 with the Ministry of Science and Higher Education of the Russian Federation

Prevalence of sleep disorders in teenage girls in Irkutsk (questionnaire data)

Background. Adequate sleep ensures a person’s physical and psycho-emotional well-being. Adolescence is one of the critical stages of life. The exclusive attention of specialists and leveling the impact of adverse factors on the body during this period is the key to the proper development and preservation of the health of adolescents. Meanwhile, sleep problems in teenage girls remain poorly understood.The aim. To study the features of the sleep regime and quality of sleep of teenage girls in the city of Irkutsk.Materials and methods. A survey of 422 teenage girls in the city of Irkutsk was conducted using a translated version of a questionnaire about adolescent sleep habits to subjectively assess their sleep and wakefulness. Two groups were formed: group I – girls with sleep problems (n = 171); group II – girls without sleep problems (n = 251).Results. Sleep disorders among teenage girls in the city of Irkutsk occurred with a frequency of 40.52 %. In most cases, a complex effect of various unfavorable factors on the sleep process has been identified. The adolescents with sleep disorders we  examined were characterized by higher rates of sleep latency, later bedtime, earlier awakening, decreased time of night sleep, as well as changes in the sleep shift indicator towards its increase. These violations were noted both on weekdays and on weekends.Conclusions. Sleep problems were reported in 40.52% of respondents. The complex impact of various unfavorable factors on sleep quality has been revealed. The features of sleep hygiene of teenage girls are reflected. The group of girls with sleep problems was characterized by increased sleep latency, later bedtime, earlier awakening, reduced sleep time, and an increase in sleep shift

Selective support for the development of regional vocational education services: The Russian experience

© 2016, Econjournals. All rights reserved.The paper relevance is reasoned by the optimization of management of regional vocational educational services. Russian regions differ from each other very much by social and economic indicators, as well as the climatic and geographical conditions. The Russian government initiated a number of reforms aimed at ensuring of equal access to vocational educational services and infrastructure across the country. One of the important components of such reforms is a targeted selective support for the development of regional vocational educational services. The paper aims to find out the specifics of selective support for the development of regional vocational educational services. The leading method is the method of action research, providing new information on the management of vocational education in the region and proposing methods for development of regional vocational educational services. The paper presents a selective mechanism to support the development of regional vocational educational services. Principles (consensus and initiative) are defined and methods (legal-regulatory, financial-economic, socio-political, information-communication, private-entrepreneurial, civil- initiative) are identified of selective support for the development of regional vocational educational services. It is found that the selective support for the development of regional vocational educational services is a component of the socio-economic development of the region and the imperative to improve the quality of life of the population. Article Submissions can be useful for research and teaching staff of vocational education, specialists of education authorities and regional authorities

Hygienic assessment of educational load in school children

The article describes the analysis of the weekly lesson schedule of students in the 5th grade of one of the schools in the region, the purpose of which is a hygienic assessment of the lesson schedule and the study of the level of performance of students. As a result of the hygienic assessment, violations in the schedule were revealed (optional classes are scheduled for the busiest day of the week, irrational distribution of lessons in accordance with the scale of difficulty of subjects).В статье описан анализ недельного расписания уроков учеников 5-го класса одной из школ, целью которого являются гигиеническая оценка расписания уроков и исследование уровня работоспособности школьников. В результате гигиенической оценки были выявлены нарушения в составлении расписания (факультативное занятие запланировано на самый загруженный день недели, нерациональное распределение уроков в соответствии со шкалой трудности предметов)