Titanium compounds as catalysts of higher alpha-olefin-based super-high-molecular polymers synthesis

The synthesis of polymers of 10 million or more molecular weight is a difficult task even in a chemical lab. Higher α-olefin-based polymer agents of such kind have found a narrow but quite important niche, the reduction of drag in the turbulent flow of hydrocarbon fluids such as oil and oil-products. In its turn, searching for a catalytic system capable to produce molecules of such a high length and to synthesize polymers of a low molecular-mass distribution is part of a global task of obtaining a high-quality product. In this paper we had observed a number of industrial catalysts with respect to their suitability for higher poly-α- olefins synthesis. A number samples representing copolymers of 1-hexene with 1-decene obtained on a previous generation catalyst, a microsphere titanium chloride catalytic agent had been compared to samples synthesized using a titanium-magnesium catalyst both in solution and in a polymer medium

The charge-dyon bound system in the spherical quantum well

The spherical wave functions of charge-dyon bounded system in a rectangular spherical quantum dot of infinitely and finite height are calculated. The transcendent equations, defining the energy spectra of the systems are obtained. The dependence of the energy levels from the wall sizes is found.Comment: 8 pages, 5 figure

The Use of Analytical Tools in the Conduct of Internal Control Procedures

The work is devoted to the study of the problems of management, the activities of international companies in solving urgent problems of risk assessment, international cooperation of companies in the development and use of software and the applications of the Business Intelligence class, Data Quality and Business Analytics, the role of SAS in the domestic market. The first part is devoted to the activities of international companies in the field of risk assessment. The second part is devoted to the review of analytical products of SAS.   Keywords: audit, risk assessment, in-depth analytics, business intelligenc

Changes of the body functions during long-term hypokinesia

Prolonged hypokinesis (100-170 days) studied in 2000 rats kept in cages limiting their mobility provoked considerable changes in the gaseous and energetic metabolism: an elevation of the total gaseous metabolism and of the rate of O2 requirement by the muscles (in the late periods of hypokinesis) and a change in the intensity of tissue respiration of the liver and myocardium. There also proved to be a reduction in the level of phosphorylation and separation of oxidative phosphorylation in the myocardium, liver, and partially in the skeletal muscle. Prolonged hypokinesia led to changes in tissue metabolism: a disturbance of development of the animals, a marked delay and an increase in the weight of the organism and the muscular system, and disturbances of the mineral and protein metabolism. Prolonged hypokinesis also lead to exhaustion of the hypothalamus-hypophysis-adrenal cortex system

MAIN MORPHOFUNCTIONAL CHANGES OF LIVER IN CASUAL AND SUICIDAL POISONINGS WITH ETHYLENE GLYCOL AT ACUTE AND CHRONIC STRESS

Our research, showed, that stress-induced, alteration, of liver that forewent poisoning and. toxic stress, that accompanied. poisoning and. had. lingering nature intensify lesion of organ causing considerable injury of its parenchyma and stroma

THE MAIN MORPHOFUNCTIONAL CHANGES OF LIVER IN CASUAL AND SUICIDAL POISONINGS WITH ETHYLENE GLYCOL BY ACUTE AND CHRONIC STRESS

Our investigation showed that the stress-induced alteration of liver, preceding poisoning and toxic stress, accompanying poisoning and. having lingering character, intensify lesion of organ, leading to considerable injury of its parenchyma and. stroma

Problem of spreading fake information in the Internet space analysis

Modern Internet space is filled with various kinds of information, including unreliable, fake information. In the current socio-cultural, socio-political, and socio-economic conditions, we should expect further increase in the spread of fakes and, as a consequence, their negative impact on people’s lives. The article analyses results of a sociological study on the attitude of the Kursk region population to fakes spread in the Internet space. The empirical basis of the study is the results of the online questionnaire survey conducted in September 2022 in the Kursk region. The sample population of the study was 521 people living in the territory of Kursk and Kursk region. Fakes are becoming a real part of life in modern society. Residents of the region are constantly faced with inaccurate information. They recognize its danger and note that fakes nevertheless “attract” their attention. The current situation requires additional measures development to regulate dissemination of information in the Internet space

Epigenetic characterization of the FMR1 promoter in induced pluripotent stem cells from human fibroblasts carrying an unmethylated full mutation

Silencing of the FMR1 gene leads to fragile X syndrome, the most common cause of inherited intellectual disability. To study the epigenetic modifications of the FMR1 gene during silencing in time, we used fibroblasts and induced pluripotent stem cells (iPSCs) of an unmethylated full mutation (uFM) individual with normal intelligence. The uFM fibroblast line carried an unmethylated FMR1 promoter region and expressed normal to slightly increased FMR1 mRNA levels. The FMR1 expression in the uFM line corresponds with the increased H3 acetylation and H3K4 methylation in combination with a reduced H3K9 methylation. After reprogramming, the FMR1 promoter region was methylated in all uFM iPSC clones. Two clones were analyzed further and showed a lack of FMR1 expression, whereas the presence of specific histone modifications also indicated a repressed FMR1 promoter. In conclusion, these findings demonstrate that the standard reprogramming procedure leads to epigenetic silencing of the fully mutated FMR1 gene

Новые возможности в определении индивидуальной нормы внутриглазного давления

This article presents the preliminary results of a clinical trial of the Individual Intraocular Pressure (IOP) Norm Analyzer. The screening method for determination of individual norm of IOP proved the efficiency for early glaucoma diagnosis, as well as in the treatment and monitoring of the disease. Patients with IOP elevated for up to 15% relative to tolerant IOP were put into the group with low risk of disease development, with IOP elevation of 15 to 25% — the group with average risk, by more than 25% — the group with high risk of developing glaucoma. The Individual IOP Norm Analyzer is an effective device for dynamic monitoring, which in combination with other examination methods increases the capabilities of early diagnosis, monitoring of glaucoma with regard to individual parameters.Представлены предварительные результаты клинического исследования анализатора индивидуальной нормы внутриглазного давления (ВГД). Скрининговый метод определения индивидуальной нормы ВГД доказал свою эффективность при ранней диагностике глаукомы, а также при лечении и мониторинге заболевания. Пациентов с превышением офтальмотонуса относитель- но индивидуальной нормы ВГД до 15% относили к группе с низким риском развития глаукомы, с превышением от 15% до 25% — к группе со средним риском, более 25% — к группе с высоким риском. Офтальмологический анализатор индивидуальной нормы ВГД — это эффективный способ динамического наблюдения, который в комплексе с другими исследованиями позволяет повысить возможности ранней диагностики, мониторинга глаукомы с учетом индивидуальных параметров

Adiabatic description of nonspherical quantum dot models

Within the effective mass approximation an adiabatic description of spheroidal and dumbbell quantum dot models in the regime of strong dimensional quantization is presented using the expansion of the wave function in appropriate sets of single-parameter basis functions. The comparison is given and the peculiarities are considered for spectral and optical characteristics of the models with axially symmetric confining potentials depending on their geometric size making use of the total sets of exact and adiabatic quantum numbers in appropriate analytic approximations