Improved scheme for integrated processing ofpine resin pinus Silvestris l.

The review is devoted to the results of many years of work in the field of modification of terepenthene, rosin and turpentine. The article provides the advanced scheme of complex processing of the original materials. The last year’s successes in producing the latest products from rosin are reached. The article shows depending on applied raw materials and conditions can produce composite structures with a wide range of physics-mechanical and operational properties

Poster: The role of mathematical disciplines in engineering practice

The article describes mathematical education as an essential part of modern engineers' fundamental training system. The research determines the role of mathematics for engineering practice by analyzing responds of survey experts: engineers with PhD and doctoral degrees in the fields of natural sciences and technology and representatives of acting industrial enterprises of Russia. The purpose of this study is to analyze the role of mathematics in engineering practice. Additionally, the task of the paper is to analyze the relationship between students 'experience with school mathematics and their choice of an engineering career. The research uses the Likert scale as the ground basis. As a result of the study, a link was established between the level of proficiency in mathematics at school and the subsequent choice of an engineering specialty by respondents. Over 80% of responding engineers were successful in mathematics at school. High school students, who are successful in mathematics, continue their success as university students. The quality of mathematical education both in high school and at university has a great influence on future engineers. The study showed that professional engineers constantly use mathematical knowledge in their work

Antiseptics on the basis of terpenoid compounds: synthesis, properties and application

Currently, chemical methods of pest bio deterioration of materials, products and constructions are the main complex of destructive actions. In particularwood preservative very effective way to save forest resources for the longest time protects. In developed countries, the use of antiseptics reached industrial scale. The search of effective forms of applyingantiseptics and rational use of them continue to be relevant tasks. The review is devoted to the methods of antiseptics on the basis of the terpenoid compounds. It is given broad spectrum biocide properties of antiseptics and use of anti-septic funds in protective compositions and coatings for various purposes

Preparation and study of physicochemical properties of modified rosins and model compounds based on them

Results of research of the modeling structures received with use of modified rosin are given in the article. It is shown that depending on the applied modifiers of rosin and conditions it is possible to make modeling structures with a wide range of physical-mechanical and operational properties. The use of modified rosin in model compositions opens up wide prospects for the development and production of new model compositions at the chemical plants of Belarus

Research of modified rosin usability in model compositions for precision molding

The research result of the modified rosin as a component of model compositions for precision cast-ing is given in the article. The last five years successes in producing the latest products from rosin are reached. New rosin products essentially differ from rosin by physi cal and chemical properties possess certain advantages enable to expand the sphere of introduction and level rosin shortcomings. Therefore development and research of new model compositions for precision casting taking into account the achievements in the field of secondary rosin product synthesis is an actual task and promotes decelerat-ing elimination in this area from foreign analogues

The relevance of the contemporary landscape-ecological and biogeochemical studies of the Ob floodplain

We have systematized and summarized the results of the Ob River floodplain studies and have shown that the flood and the floodplain influence all the territory of Western Siberia due to the processes happening there. The floodplain at different times was the object of interest of many scientists, but the total level of study of the Ob and the associated ground and the lake network water resources and quality can be generally assessed as low. The waters of the Ob middle course are quite polluted according to bacteria content. It is possible that a significant part oforganic and biogenic substances, microorganisms and some microelements come into the Ob floodplain waters from anthropogenic and natural sources distributed in the watersheds area. The soils of the Ob Riverfloodplain can be considered to be clean andfree ofany chemical pollution. In these soils, the amount of trace elements is small. To study the floodplain changes after a flood the methods of landscape ecology are used, such as the collection and analysis of stock and descriptive materials, literature and maps; the preparation of a series of component and general landscape maps. Nowadays a complex research of the Ob River and the adjacent surface waters is relevant

Cellulases from Mycelial fungi <em>Penicillium verruculosum</em> as a Real Alternative to Trichoderma Enzymes in Industrial Hydrolysis of Cellulosic Biomass

Abstract The possibility of using the recipient strain Penicillium verruculosum B1-537 (ΔniaD) as a producer of laboratory and industrial enzymes was considered. The advantage of this strain is its ability to secrete a basic cellulase complex consisting of cellobiohydrolases, endoglucanases, and β-glucosidase, which exceeds in its hydrolytic ability the enzyme complex of Hypocrea (Trichoderma) strains. Using the expression system, the basic complex of cellulases of the recipient strain Piptochaetium verruculosum B1-537 (ΔniaD) was supplemented with new (booster) enzymes that are necessary to increase its hydrolytic activity. Enzyme preparations adapted to the processing of various types of renewable plant biomass were obtained

Project activity in the formation of subject competencies

The project-based learning has long established itself as one of the most stimulating methods of mastering the educational program. However, to study in depth of mathematical disciplines, project tasks must be specifically formulated for the topic being studied. The purpose of this work is to study the methodological relationship between the declared projects and the studied topic of mathematics, as well as a comparative analysis of the results of the development of three mathematical disciplines using the project method and without it. The work on the projects has been carried out for three years at our university and it is aimed at activating the independent cognitive activity of students. In 2018-2019, these were applied and educational projects, the topics for which were selected by teachers. In 2019-2020, students were given the right to independently choose a project topic based on their scientific interests and develop it. In one experimental group, students had the opportunity to consult with the teacher to find a solution to the project problem, in the other such an opportunity was not available. The results of both groups were roughly the same. The conclusion that we came to as a result of this work: project activity increases the horizons of students and allows us to see interdisciplinary connections. Project activity is more effective only if the student works closely with the teacher

Molecular hierarchy of mammary differentiation yields refined markers of mammary stem cells

The partial purification of mouse mammary gland stem cells (MaSCs) using combinatorial cell surface markers (Lin-CD24+CD29hCD49fh) has improved our understanding of their role in normal development and breast tumorigenesis. Despite the significant improvement in MaSC enrichment, there is presently no methodology that adequately isolates pure MaSCs. Seeking new markers of MaSCs, we characterized the stem-like properties and expression signature of label-retaining cells from the mammary gland of mice expressing a controllable H2b-GFP transgene. In this system, the transgene expression can be repressed in a doxycycline-dependent fashion, allowing isolation of slowly dividing cells with retained nuclear GFP signal. Here, we show that H2b-GFPh cells reside within the predicted MaSC compartment and display greater mammary reconstitution unit frequency compared with H2b-GFPneg MaSCs. According to their transcriptome profile, H2b-GFPh MaSCs are enriched for pathways thought to play important roles in adult stem cells. We found Cd1d, a glycoprotein expressed on the surface of antigen-presenting cells, to be highly expressed by H2b-GFPh MaSCs, and isolation of Cd1d+ MaSCs further improved the mammary reconstitution unit enrichment frequency to nearly a single-cell level. Additionally, we functionally characterized a set of MaSC-enriched genes, discovering factors controlling MaSC survival. Collectively, our data provide tools for isolating a more precisely defined population of MaSCs and point to potentially critical factors for MaSC maintenance