Comparison of early reactions of the blood system in rats to immobilization, the action of hypoxia and the administration of erythopoietin

Three series of experiments were simultaneously carried on rats with the purpose of studying the action of different stimulants on the blood system; rats were subjected to immobilization, hypoxic hypoxia and erythropoietin administration. Changes in various cellular forms in the bone marrow, the thymus and the spleen were studied. A unitypical reaction, as in stress, was noted during the first hours; a reduction of the cell count in the lymphoid organs, a reduction of granulocytes and an increase of lymphoid cells in the bone marrow. The differences were chiefly quantitative. This was followed by stimulation of myelo and erythropoiesis determined by the specific features of the action applied. Nonspecific blood reaction was apparently due to activation of the adaptation mechanisms

Justification of binder material selection for carbon particles incorporation into fibrous electromagnetic radiation absorber

The paper presents justification of a binder material for incorporating carbon particles into the interfiber space of electromagnetic radiation absorber. A method for carbon particles incorporation into a fibrous material has been developed. It is based on applying a carbon-containing nanocomposite to the fibrous material’s surface. Previously, the research of carbon particles incorporation into a synthetic material by using an aqueous solution were carried out, which ensured a uniform distribution of carbon particles in the material structure. However, the properties of the material have changed significantly upon mechanical deformation. Therefore, the carbon particles incorporation process was investigated using various nanocomposites obtained on the basis of mixtures of vinyl acetate polymer, or epoxy polymer, or surface-active substance with carbon black. Based on the results of electron microscopic analysis and the reflection and transmission coefficients frequency dependences in the frequency range 0.7–17 GHz, the efficiency of using a nanocomposite based on a mixture of surface-active substance and carbon black to create electromagnetic radiation absorbers was justified. Such electromagnetic radiation absorbers have the transmission coefficient value about –18 dB and reflection coefficient value about –12 dB in the frequency range 7–13 GHz. Carbon-containing electromagnetic radiation absorbers based on fibrous material have thickness less than 3 mm, properties of flexibility and resistance to mechanical deformation. It can be used in various fields, in particular for hiding objects from radio frequency reconnaissance or protecting equipment from external interference.The paper presents justification of a binder material for incorporating carbon particles into the interfiber space of electromagnetic radiation absorber. A method for carbon particles incorporation into a fibrous material has been developed. It is based on applying a carbon-containing nanocomposite to the fibrous material’s surface. Previously, the research of carbon particles incorporation into a synthetic material by using an aqueous solution were carried out, which ensured a uniform distribution of carbon particles in the material structure. However, the properties of the material have changed significantly upon mechanical deformation. Therefore, the carbon particles incorporation process was investigated using various nanocomposites obtained on the basis of mixtures of vinyl acetate polymer, or epoxy polymer, or surface-active substance with carbon black. Based on the results of electron microscopic analysis and the reflection and transmission coefficients frequency dependences in the frequency range 0.7–17 GHz, the efficiency of using a nanocomposite based on a mixture of surface-active substance and carbon black to create electromagnetic radiation absorbers was justified. Such electromagnetic radiation absorbers have the transmission coefficient value about –18 dB and reflection coefficient value about –12 dB in the frequency range 7–13 GHz. Carbon-containing electromagnetic radiation absorbers based on fibrous material have thickness less than 3 mm, properties of flexibility and resistance to mechanical deformation. It can be used in various fields, in particular for hiding objects from radio frequency reconnaissance or protecting equipment from external interference

Study of the associations between polymorphic markers rs1800629 TNFα, rs909253 Ltα, rs767455 TNFR1, rs1061624 TNFR2 and the development of type 2 diabetes = Изучение ассоциаций полиморфных маркеров генов факторов некроза опухоли и их рецепторов rs1800629 TNFα, rs909253 Ltα, rs767455 TNFR1, rs1061624 TNFR2 с формированием сахарного диабета 2 типа

To study the association between polymorphic genetic markers, tumor necrosis factors and their receptors (rs 1800629 TNFα, rs 909253 Ltα, rs 767455 TNFR1, rs 1061624 TNFR2) and the development of type 2 diabetes (T2D) among the population of the Central Black Earth Region of Russi

INFLUENCE OF ENVIRONMENTALLY FAVOURABLE BIOSTIMULATORS ON THE YIELD AND QUALITY OF FLAX

Institute of Inorganic Chemistry o f Riga Technical University Studies on the effect o f preplant treatment of seed material with micronutrients BZn and BCu plus phytohormone Germin on the yield and quality of flax straw and flax seeds were continued using flax cultivar ‘Laura’. The yield and quality of flax straw and flax seeds increased significantly, especially under unfavourable environmental conditions. Anatomical studies on flax stems showed that the best effect on flax fibre formation was by treatment of seed material with copper borate BCu plus pytohormone Germin which resulted in a nearly uninterrupted fibre cylinder in the flax stems. Key words: Micronutrients, flax, pfytohormone, fibres

Role of socio-geographical parameters in natural resource management of Belgorod region, Russia

The article describes the approaches to the study of patterns of the social-geographical parameters of regional environmental management. The variant of the author's methodology for the study of social-geographical aspects of public nature management and assessment of aesthetic and consumer parameters of the environment is proposed and tested. The case study was conducted in the rural village Streletskoe, Krasnogvardeisky district of Belgorod regio

Bimodal Magnetic and Fluorescent Nanoparticles for Biomedical Applications

The study was carried out with the financial support of the Russian Foundation for Basic Research in the framework of the research project № 18-33-00785) as well as with the help of the complex program of the Ural Branch of the Russian Academy of Sciences project № 18-10-2-5

Business game as a form of conduct of students in the professional activity

В последнее время все чаще преподавателями высшей школы используются новые образовательные технологии. На сегодняшний день актуальны те технологии, которые не только ориентируют студентов на усвоение знаний, умений и демонстрацию навыков, но и дают возможность будущим специалистам проявить и реализовать себя в преддверии грядущей профессиональной деятельности.In recent years, more and more high school teachers use new educational technologies . To date, relevant technologies which not only orient the students to assimilate the knowledge, skills and demonstration of skills , but also allow future engineers to exercise and realize themselves in anticipation of the upcoming professional activities

Blood saving possibilities in delivering patients with placenta increta

According to the results of systematic reviews of WHO, maternal mortality associated with massive bleeding almost reached 30% and has no tendency to decrease. Among the causes of massive obstetric hemorrhage, the most challenging ones are uterine hypotension and morbidity adherence placenta. Most severe complication for placentation is placenta increta in the uterine wall. Over the past 50 years, the number of cases with morbidity adherence placenta has increased tenfold. By all indications, this pathology has taken on the character of an epidemic and is one of the main causes for massive blood loss and blood transfusion, as well as peripartum hysterectomy. For surgical hemostasis in this pathology we apply X-ray vascular methods (temporary balloon occlusion of large vessels, vascular embolization), ligation of the iliac, uterine, ovarian arteries, various versions of distal hemostasis, including the use of uterine turnstiles, intrauterine and vaginal cylinders, compression sutures. However, data confirming the advantage of any specified methods are not enough. The risk of massive bleeding is high while using any of these methods. The article analyzes the blood saving methods existing at the present stage and possibility of these methods usage in obstetrics. Besides, we describe efficacy and safety of their use in massive blood loss, including the surgical treatment of morbidity adherence placenta

Use of a neural network in creating a digital assistant for blind and visually impaired people

The experience of ongoing research in image processing clearly demonstrates the huge scope for the development of new neural networks that can help people in a wide range of tasks. The authors chose the direction of work related to helping people who have vision problems. The article considers a convolutional neural network of the Mask R-CNN model for segmenting objects in an image. During the research the authors study a large number of algorithms that can quickly and accurately process images, such as Faster R-CNN, which was the most efficient in 2020. During the analysis, it was revealed that the use of Mask R-N technology can significantly increase the efficiency of performing tasks, since this algorithm is the latest version of the machine learning model. As a result of the study, a neural network was developed that is capable of identifying and distinguishing a large number of objects in an image. The next step is to refine the algorithm and use additional means of interaction with the hardware of the systems to increase the speed of the neural network. In the future, the resulting neural network will be integrated into the Digital Assistant for the Blind and Visually Impaired Persons application. This application is guaranteed to improve the daily life of people with disabilities who experience certain inconveniences due to their features, and can become the basis for other, larger projects related, for example, to unmanned devices, as well as services whose work is directly based on image processing

Features and causes of gerontological ageism in the provision of medical and social assistance

Based on the data of the author’s sociological survey of medical and social workers, the article analyzes the prevalence of ageism in the activities of medical and social workers, its factors and prerequisite