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Introduction. The paper is devoted to current processes in the field of digitalization of higher education. The purpose of the study is to identify systemic factors that determine the sustainability of digital transformation processes in the field of education in order to minimize current and possible risks. The novelty consists in the proposed analytical frame with the inclusion of epistemology changes as a systemic factor. Methodology. The study was conducted within the framework of a comparative methodology using methods of collecting empirical information, interpolation, analysis and generalization, qualitative content analysis, conceptual and terminological analysis, interpretation. Three conditional levels of consideration are proposed - the macro level (the level of national strategies and regulation), the meso level (the level of strategies and regulation within the higher education system) and the micro level (the institutional level). At the same time, the systemic patterns of development within these levels are determined by meta-level factors, that is, philosophical and culturological factors that, in fact, form the ontological space of the existence of these levels and affect the change of epistemologies, as well as the formation of digital agency. Discussion. A number of directions for increasing the efficiency of digitalization of higher education are proposed, the most important of which is the study of changes in epistemologies and the impact of these changes on value systems in education. As practical steps to support digitalization processes, it is proposed to develop an integrated digitalization strategy at the university level, create cloud resources for various target groups, develop step-by-step instructions and methodological recommendations for their use, stimulate network interaction within the framework of resource sharing and exchange, create a system for advanced training of teachers and methodologists using an electronic platform. Conclusion. The proposed recommendations can be used to expand the field of scientific research on the problems of digitalization of higher education, as well as to improve policies and practices at the institutional level.

Introduction. The paper is devoted to the analysis of the problems of inequality in modern education from the standpoint of a world-system approach. The connection of educational inequality with the inequality of societies, in the structure of “core - semiperiphery - periphery”, is revealed on the basis of the characteristics of educational inequality and the strategy of overcoming inequality in education within the framework of the world-system paradigm of critical pedagogy. Methodology. As a theoretical and methodological basis of the study, the concept of the rise and decline of hegemony in the world system was used. Wallerstein, as well as the ideas of representatives of the world-system paradigm in comparative education and critical pedagogy (R. F. Arnova, M. M. Clements, T. Griffiths, L. Knezhevich, M. Demeter, K. T. Haines). On the basis of a world-system approach, the ideas about educational inequality by a number of representatives of comparative education were systematized, namely, the ideas of such authors as F. Altbach, M. Karnoya, E. Welcha, R. Flacha, H. Zinna, D. Macedo. Discussion. Changes in the education system of a society integrated into the world system through the specialization of its economy correspond to the specific transformations that the innovation propagated by the global hegemon causes in this society. As the world system expands, contradictions accumulate and centers capable of challenging the existing order in the struggle for equality of positions appear in the semi-peripheral area. The geopolitical opposition of the state to the order prevailing in the world system leads to qualitative changes in the education system of the society controlled by it. Conclusion. Values and the nature of relations in the education system correspond to the nature of the political regime and the level of inclusion of society in the world system. At the present stage, educational inequality reveals connections with the processes of universalization, commercialization, informatization of education, as well as with the problems of introducing the ideology of equality of “minorities” declared by the core into the cultures of peripheral societies. The results of the study can become a theoretical basis for the interpretation of the processes that cause educational inequality in modern Russia.

Introduction. The relevance of the dialogue between philosophy and education is viewed as the maturation of a new paradigm of education and the solution of problems in the “society - education - person” system. A comprehensive study of publications in the journal “Philosophy of Education” (2006-2010) is based on the practice of using the Journal’s list of rubrics, contributing to the further formation and determination of the initial foundations of the philosophy of education as an independent philosophical cognition and the development of new approaches and parameters for understanding further empirical material. The methodology of revealing the general picture of evolutionary processes in education is represented by new ontological knowledge about the system, functional representation of activity and metasystem approach to the innovative development of society and education. Discussion. The analysis of the essence, problems and prospects of domestic education based on the methodology of socio-philosophical and philosophical-educational theoretical constructs reveals a wide variety of conceptual approaches: a systematic vision of education that sets the meaning, purpose, form and content of education for understanding the foundations on which the educational process is based; analysis of the goals and means of innovative education in an innovative society; educational dialogue in the development of societies of the East and West; understanding of changes in the axiological foundations of Russian education; formation of a system of knowledge necessary for the reproduction by education of qualitative parameters of human resources and practices. The need for the empiricism of education allows seeing more fully the achievements, contradictions and dynamics of philosophical knowledge, which in the most concentrated and generalized form reflects the nature, level and direction of the development of human society. Conclusion. The results of the five-year work of the journal “Philosophy of Education” indicates the existence of scientific and methodological foundations necessary for the further development of knowledge about education.

Introduction. The development of an understanding of pedagogical faith within the framework of the philosophy of education is associated with the loss of the fundamental foundations of pedagogical activity. One of the solutions to this problem may be the formation of pedagogical faith among future social educators. Methodology. The research was based on the integration of philosophical and pedagogical views and the study of the phenomenon of pedagogical faith in relation to educational activities. The concept of “faith” in the history of the development of philosophical thought is revealed, which made it possible to penetrate into the essence of understanding the specifics of pedagogical faith. Discussion. The appeal to the problem of faith in the works of Heraclitus, Plato, Aristotle and other ancient Greek philosophers gives an a priori explanation of this phenomenon. The works of N. Berdyaev, M. Buber, F. Bacon, T. Hobbes, G. V. F. Hegel, I. Kant, S. Kierkegaard, B. Russell, D. Hume and K. Jaspers in the aspect of developing the essential characteristics of the phenomenon of faith have a subjectivist character, conditioned to a greater extent by Christian morality. In the works of the classical researchers of pedagogy (Sh. A. Amonashvili, J. Dewey, S. T. Shatsky) and modern domestic teachers (V. L. Benin, M. I. Makarova, S. Soloveitchik, V. D. Shadrikov), the phenomenon of pedagogical faith is recognized as part of the general pedagogical culture. Conclusion. Pedagogical faith is included in the general pedagogical culture and finds expression in love for children on the basis of an ideal model of the human image. The mechanisms of realization of pedagogical faith are trust in the child and pedagogical humility. The need for its understanding and recognition contributes to the growth of pedagogical creativity and spiritual perfection of the teacher and student. The prospect of further research may be the formation of the generic category of “pedagogical culture” and the category of “pedagogical faith”.

Introduction. Addressing the phenomenon of the Eurasian educational space is actualized by the modern processes of socio-cultural transformation taking place in the countries of its participants, which necessitate the compilation of some generalized idea of the degree of realization of the idea. The paper raises the problem of comparing the goals and objectives of Russia’s entry into the Eurasian educational space with its modern needs. Methodology. Consider the phenomenon of the Eurasian educational space from the standpoint of systemic, functional and communicative approaches and the theory of balance of power as a kind of socio-cultural space within which each participating state, fulfilling the terms of the agreement, at the same time pursues its own objectives. Discussion. Based on the analysis of various types of associations and agreements of the participating countries of the Eurasian educational space, the complexity and dynamism of this system are shown. The current trends affecting the transformation of the attitude of countries to the idea of creating a common educational space are revealed. Using the example of the analysis of resolutions of Forums of creative and scientific intelligentsia, member states of the Commonwealth, government documents, works of Russian and foreign researchers, come to the conclusion about the need for a more balanced policy on the part of Russia in implementing the idea of the Eurasian educational space. Conclusion. The analysis allows us to conclude that the use of the term “Eurasian educational space” at the moment is rather an idea shared by many states, but not implemented as a single whole. An attempt to represent the European educational space in the form of a system has shown a rather complexly constructed multi-layered composition of various interacting systems and subsystems, including bilateral partner types of associations, as well as various coalitions and associations. One of the important factors of preserving the conditions of interaction in the Eurasian educational space is the formation of motivation to study and preserve the Russian language as a means of international communication.

Introduction. Education is the most complex phenomenon of the existence of society, therefore, to describe it, the concept of “phenomenon of education” is introduced and it is noted that every phenomenon has a complex structure and explication. In this regard, the current tendency to reduce the problems of philosophy of education to the problems of pedagogical science and to its particular issues requires special discussion. A variant of the philosophical understanding of education is proposed and the task of the philosophy of education is formulated - the formation of one’s own status and the subject of one’s research. Methodology. The phenomenon of education is investigated using analytical-comparative and inductive-deductive methodology, based on the unity of the logical and historical ways of ascent from the abstract to the concrete. Particular attention is paid to the search for a philosophical essential definition of education (M. Scheler, V. M. Rozin), which is considered as a person’s entry into the world at three levels of society being - at the activity, socio-structural and socio-system. Discussion. Based on the parameters of education, a matrix of education is formed, which makes it possible to comprehend the state and prospects of the development of education at different levels of the ontology of society. It is argued that the education system is becoming the most important means and tool for transforming the image of society at the present stage of its development and is considered as the most important tool for building the society of the future, since it is capable of deeply and effectively transforming the nature of both man and society. Conclusion. Today, the Russian education system is constantly at the epicenter of reform processes, therefore, the role and influence of philosophical ideas on the design and forecasting of the future is significantly increasing. The proposed approaches (activity, socio-structural and sociosystem) and philosophical reflection to the study of the phenomenon of education have significant explanatory capabilities for understanding transformational processes in education.

Introduction. In a situation of intersubjective interaction, individuals are immersed in a ramified field of evaluation of self, others, themselves by others, and others by themselves as a factor influencing the specificity of communication and the scenario of communicative tasks. The shared meanings that develop in the milieu of the I-other determines the polyvalent aspects of social interaction, and this makes intersubjectivity a fundamental characteristic of intersubjective interaction. The aim of this work is to identify intersubjective structures in the mechanism of social communication and to consider their role in this process. Methodology. The object of the study is the intersubjective aspect of social communication, and the subject of the study is the process of its explication in the interaction of individuals. The key methodological point of this work is the methods of socio-philosophical analysis of the concepts of E. Husserl, the founder of the problematic covered in the article, and the modern Western researcher K. Lehrer. Discussion. The question of the role and functional significance of intersubjectivity in intersubjective interaction is explicated throughout the study. The general model of social interaction on a practical level is characterized, and it is found that its foundations go back to intersubjective structures. The bases of social interaction are trust and consensus that allow individuals to enrich primary knowledge about each other that comes from personal values and transform behavioral strategies with the development and deepening of their relations. These theoretical findings outline a model for realizing subject-subject interaction in the contemporary educational process and are relevant for studying it. Conclusion. The presence of intersubjective structures in the mechanism of organization of social communication ensures the constitution of common meanings by the consciousnesses of subjects in the environment of I-other relations, in the absence of which it is impossible to realize intersubjective communication, which means that the process of social interaction is also impossible.

Introduction. Training of specialists with systematized knowledge and practical skills is implemented in higher education organizations. In order to reduce the impact of conflicts on the educational process, it is necessary to determine their essence and content. To this end, it is necessary to identify the forms of manifestation and the underlying causes of conflicts that can be solved using the methodology of social philosophy, which allows generalizing the processes going on in educational organizations. Methodology. The work used discursive methods of comparative analysis and philosophical reflection, which is able to identify essential features in the objects of research. The synthesis method, on the basis of which a new model of a fragment of educational reality has been created, allows us to determine the underlying causes of conflicts in universities and influence effective ways of managing this phenomenon. Discussion. The study of conflict as an integral phenomenon in society makes it possible to conclude that conflict management methods should be based on taking into account the interactions of subjects, as well as in relation to the internal culture and ideologies of the functioning of a public organization, the degree of social responsibility, regulatory relations and professional differences of the participants of the organization. To manage conflicts in the organization of higher education, it is proposed to influence simultaneously the cultural environment, participants and potential organizers of the conflict, the content of relations between the participants of the organization. On the basis of idealistic, realistic, materialistic, pragmatic, anthropocentric, humanistic and technocratic models, a system of conflict management methods is proposed. Conclusion. The conducted research has shown that in order to create a “culture of trust” in organizations that train highly qualified specialists, it is necessary to stimulate the development of value orientations among its participants that would be aimed at achieving generally significant goals.

Introduction. The paper, using the example of the creative biography of Lyudmila G. Borisova and the history of the formation of sociology in Novosibirsk Akademgorodok, discusses the possibility of replicating unique scientific and educational innovations in the institutional space of Russian society. Methodology. The methodology is based on the concept of the diversity of the transition to modernity. The method of research of scientific schools in the context of the relationship of the structure of science with the social problems of society, the biographical method and the method of research of intellectual networks. The empirical base of the research is based on L. G. Borisova’s documents from the Open Archive of the SB RAS: office documentation, materials of personal origin, scientific publications. Discussion. The key milestones of L.G. Borisova’s biography are revealed in the context of institutional transformations of science and education in the late USSR, the development of the Novosibirsk Scientific Center (NSC); the history of the formation of sociological trends in Novosibirsk Akademgorodok is shown, the features of one of them, the sociology of education, are revealed. The characteristic of a special, ascetic type of Russian scientist is given. The history of the successes and failures of the two missions of L. G. Borisova as the organizer of sociological research and the initiator of the introduction of the system of collective creative activity (CTD) in education. Conclusion. L. G. Borisova’s activity as an ascetic scientist was guided by the following principles: unity of word and deed, public service and the usefulness of science for society. She translated these ideas into relationships with students and colleagues. The new stage of Russian reforms in education has significantly reduced the autonomy of professional communities of scientists and teachers, narrowed the recruitment base for science and pedagogy, and increased the alienation of professionals from decision-making. In the changed conditions, her departure turned out to be irreplaceable for the scientific school.

Introduction. In the context of institutional changes taking place at the university, building the interaction of the pedagogical university with basic schools is of particular importance for the development of the potential of the university and the regional education system. In order to create a sustainable mechanism for the inclusion of universities in the continuous development of pedagogical workers in the region, there is a need to develop a model of interaction between a pedagogical university and basic schools. The article describes an interaction model developed in the course of a study conducted on the basis of Novosibirsk State Pedagogical University in 2021. Methodology. An analysis of the experience of interaction between universities and schools made it possible to identify empirical models of interaction that currently exist and are being successfully implemented at the same time (event-based random connections, oriented resource exchange, research union, network partnership). Discussion. The model is obtained by integrating the existing empirical interaction models. It ensures the consolidation and joint use of the resources of the pedagogical university and schools to create a single educational space in the region. A prerequisite for integration is: structuring the lines and directions of interaction between the university and the school; implementation of institutional projects at the university; selection of schools that have some characteristics that guarantee effective interaction (basic schools). Taking into account in the model the features of the education system of the region, due to the specifics of its socio-economic development, makes it possible to include a pedagogical university in the regional system of continuous development of pedagogical workers. Conclusion. The implementation of the model is impossible without coordinated actions of the pedagogical university, regional government bodies, professional associations (communities) of pedagogical workers, basic schools, as well as systematic information support for its functioning. The key results of the implementation of the model in the Novosibirsk region are the identified effective methodological initiatives in three areas, ready for scaling in other subjects of the Russian Federation.

Introduction. Modeling of the educational process makes it possible to determine the dependence of the level of project culture on the continuity of graphic education. When recreating the process of developing cognitive interest in the practice of graphic activity, the subject, goals and objectives of modeling were determined. In order to rationally organize the process of continuous graphic education, it is necessary to increase the level of development of cognitive interest, graphic training and the formation of a higher level of project culture. Methodology. The research was carried out by a team of teachers of the Design Department of the Moscow State Technical University named after G. I. Nosov in Magnitogorsk using a comprehensive study of theoretical and design materials to identify individual features of the design of decorative and applied art products based on the stages of graphic activity. Discussion. Today, higher schools highlight the priority direction - the education of a comprehensively developed personality of engineering specialties. At the Moscow State Technical University named after G. I. This happens through the implementation of a teaching methodology focused on special conditions for motivating a student to graphic activity through information technology. The used teaching methodology clearly proves that step-by-step teaching of technical graphics allows you to raise the level of graphic training and creates a basis for the development of the project culture of the future engineer. The study does not exhaust the completeness of the problem of the growth of the level of project culture in the educational process, in general, elaboration and adjustment of each stage of graphic education is required. Conclusion. The implemented methodology included an educational and methodological complex aimed at the step-by-step formation of graphic activity within the educational process by means of drawing graphics. The developed materials can be used by teachers of other universities in teaching engineering graphics.

Dechlorination of the hydroxy derivatives of polychlorinated biphenyls in coal tar pitch has been carried out. It is shown that the heat treatment of polychlorinated biphenyl congener mixtures and hydroxy derivatives of polychlorobiphenyls in toluene-insoluble substances of coal tar pitch involves hydrodechlorination of chloroarenes and their hydroxy derivatives with hydrogen transfer from coal tar pitch compounds. The major products of these reactions are the products of condensation with coal tar pitch compounds, as well as congeners of polychlorinated biphenyls and hydroxyl derivatives of polychlorobiphenyls a smaller number of chlorine atoms.

The results of laboratory studies on the additional treatment of model wastewater from pharmaceutical production with the help of the combined effect of UV radiation and hydrogen peroxide are presented. Literature data on the existing purification technological schemes were analyzed, with the determination of their main advantages and disadvantages. Experimental results were obtained on the treatment of model solutions of acetylsalicylic acid, tetracycline and sulfadimezin after passing through three stages of purification: photooxidation, coagulation, and sorption. The values of chemical oxygen demand (COD) and concentration of active pharmaceutical ingredients (API) were determined. The combined action of photooxidation and hydrogen peroxide makes it possible to achieve purification efficiency up to 80 % for COD and up to 99 % for API. A technological scheme for the treatment of pharmaceutical wastewater is proposed.

Hematite nanoparticles (23-150 nm) were obtained and dispersed in a hydrocarbon medium. The introduction of hematite nanoparticles at a concentration of 0.02 to 0.30 mass % into the oil residue during thermolysis allows increasing the yield of gasoline and reducing the yield of resins. The role of hematite is explained by its ability to selectively sorb resins and asphaltenes on its surface.

Antiviral activity of extracts from 14 plant species of 12 genera of 9 botanical families in the transplanted culture of MDCK cells against influenza virus A/Aichi/2/68 (H3N2) (human) and A/chicken/Kurgan/05/2005 (H5N1) (birds) was investigated. Phytochemical characterisation of vegetal raw materials of these species for the content of certain groups of polyphenolic and terpenoid compounds was carried out. The effect of plant extracts on the influenza virus of each subtype was assessed relying on the value of the neutralization index. It was found that aqueous and ethanol extracts of the studied plant species exhibit different extents of activity against each of the influenza virus subtypes: from minimum to almost 100 % of virus-inhibiting values. Complete (100 %) inhibition, selectively for each of the two influenza virus subtypes, was found in the extracts of 6 plant species: three Persicaria species ( P. scabra, P. lapathifolia, P. hydropiper ), Comarum salesovianum (leaves and flowers), Dasiphora fruticosa and Hedysarum alpinum . They can be considered promising for further studies of antiviral activity against the human and bird influenza virus. A phytochemical assessment of the plant raw materials of the studied species showed that maximum amounts of flavonols (6.42 %), catechins (1.76 %), tannins (28.46 %) and carotenoids (70.4 %) were found in the raw materials of different plant species, extracts of which showed selective influenza activity of varying extent. Promising species can be recommended for more in-depth study, as basic, in order to develop phytopreparations of anti-influenza action against RNA-genomic viruses - human and bird influenza virus. At the same time, it is necessary to take into account the taxonomic position of the species, the type of extraction, as well as the part or organ of the plant taken for study.

This paper presents experimental data on the physicochemical properties of oxidized bitumen produced by the oil refinery plants OJSC TAIF-NK and OJSC Syzran Oil Refinery before and after aging in a thin film in the presence of the developed additive Adgezolin, as well as in the composition with polymer-bituminous binders obtained on the basis of these bitumens. The domestic adhesive additives BP-KSP, Adgezol-6 and imported additive Wetfix (Sweden) were used for comparison. The most significant change (∆ T ) in brittleness temperature (5.1 °С) was found in bitumen samples modified with 0.35 mass % Adgezol-6 and 0.5 mass % Wetfix additives, which does not correspond to the methodological document of the road construction industry (ODM 218.2.004-2006). In addition, the study of the qualitative properties of polymer-bitumen binders in comparison with the original bitumen shows that the addition of polymers to the studied bitumen has a positive effect on ∆ T of softening after heating; this indicator is within the state standard GOST (not more than 5 °C). The introduction of additives also improves the aging stability of the bitumen: introduction of Adgezolin additive in an amount of 0.8% causes a significant decrease in ∆ T of softening. Comparative analysis of the efficiency with respect to industrially developed domestic and foreign additives allows us to emphasize the high quality of modified bitumen based on Adgezolin additive. Malacometric indicators for evaluating the quality of bitumen modified with the developed Adgezolin additive characterize less severe aging of bitumen binders in comparison with the considered additives, which allows us to recommend it for industrial approval.

The work is devoted to the synthesis and study of porous carbon materials: thermally expanded graphite (TEG), carbon nanofibres, and activated carbon. The possibility of using them in electrochemical current sources, in particular, in supercapacitors, was investigated. The physicochemical properties of the obtained samples were studied by low-temperature nitrogen adsorption, cyclic voltammetry, and electron microscopy. The modification of carbon materials was carried out in three ways, and the effect of the modification on the values of specific capacitance and surface area was studied. It is revealed that the samples are characterized by the well developed porous structure: for initial materials, the maximum surface area was 759 m²/g, while for the composites obtained as a result of modification, it was 187 m²/g. It was shown that the highest specific capacitance was typical for the materials possessing micro- and mesoporous structure, with an average pore size of 3-5 nm. Modification of the surface of carbon materials with nickel led to a decrease in the specific surface area, an increase in the average pore diameter, and also, in some cases, to an increase in the specific capacitance. Among the materials with deposited nickel particles, the maximum specific capacity (116 F/g) was exhibited by a composite of 20 mass % NiО/80 mass % TEG. Treatment with nitric acid and mechanical activation led to an increase in the fraction of micropores in the samples and to an increase in the specific capacitance. The data obtained prove that the studied carbon materials are highly promising for electrochemical applications.

A series of previously unknown 1,3-dialkyl-4-nitro-1,2,3-triazolium salts with the substituents of different kinds (alkyl = Me, Et, n -Pr, i -Pr, n -Bu, s -Bu, i -Amyl) were synthesized by regioselective quaternization of N2- and N3-alkyl-4-nitro-1,2,3-triazoles with dialkyl sulphates in a high yield. These salts are gaining an ever-growing interest in the chemistry of energetically efficient materials, catalysts and ionic liquids. Among the two regioisomers, solely N3-substituted derivatives were found to be involved in the reaction with dialkyl sulphates. The products of N2-substitution do not enter quaternization, and this fact makes it possible to separate the mixtures of N2- and N3-isomers that exhibit close physicochemical characteristics limiting their separation by preparative techniques. The structures of the new 1,3-dialkyl-4-nitro-1,2,3-triazolium salts were proved by means of IR spectroscopy, ¹H and ¹³C NMR spectroscopy, as well as single-crystal X-ray diffraction and elemental analysis.

Quantitative chemical analysis of snow for the concentrations of water-soluble forms of Zn, Pb, Cd, Cu was carried out by means of stripping voltammetry in snow water sampled in 2019. The content of organic carbon in the sediments collected on the filter was determined using titrimetry. Calculation of liquid and solid melt runoff during the snow flood of 2019 was carried out relying on the results of chemical and analytical monitoring. Based on the previous chemical and analytical studies of the solid particles in snow cores for the content of the sorbed forms of Zn, Pb, Cd, Cu, the amount of chemical load on the channel network of the upper reach of the Ob river in the area affected by Barnaul city was calculated.

During recent years, in view of a decrease in the reserves of light oil, much attention has been paid to the ways for involving high-sulphur heavy hydrocarbon feedstock into processing. Processing of these raw materials will allow obtaining additional amounts of light distillates. Results of the studies of high-sulphur vacuum residue cracking at a temperature of 500 °C with varied process duration are presented. Typical features of the changes in the material and fractional composition of cracking products are demonstrated. Changes in the group composition of the sulphur-containing compounds of oils are investigated depending on the thermal treatment time; the kinetic regularities of the formation and destruction of the derivatives of thiophene, benzo- and dibenzothiophene are established. Changes in the structure-group parameters of resins and asphaltenes during cracking are calculated. It is shown that the cracking of resins and asphaltenes is accompanied by the formation of a large set of low-molecular-weight sulphur-containing compounds getting into cracking products. The data obtained will provide an improved understanding of thermal transformations of sulphur-containing compounds in vacuum residues during cracking.

In order to specify region-related mineral and amino acid contents in the vegetative parts of Chamerion angustifolium L . , called Ivan-Chai in Russia, growing in non-polluted environments within the Magadan Region, we analyzed the content of twenty-five chemical elements and sixteen amino acids in dry raw material (leaves) and solution (decoction). Heavy metal concentrations were found to be within permissible values. It was revealed that this species from the Kolyma area is especially valuable because its fermented leaves accumulate vitally important elements: calcium, magnesium, potassium, phosphorus, manganese, iron, copper, boron, silicon, cobalt, and it is able to meet in different extents the daily requirements of adults for these elements. The lower content of cobalt, selenium and zinc in this plant raw material in comparison with the material from other regions depicts the biogeochemical features of the northern territory. The concentrations of all the studied amino acids in Ch. angustifolium from the Magadan Region were determined to be higher than in the vegetative parts of this plant collected in the Krasnoyarsk Region. We have confirmed the opinion of a number of other authors that Ch. angustifolium is a useful prophylactic and biologically active remedy, which is able to prevent an insignificant deficit of some vital elements and may be used as a mineral dietary supplement for people of any age.

The capsule review of the scientific editor for the thematic issue of the Siberian Journal of Forest Science, 2021, number 5 is done, dedicated to the Siberian silkworm problems.

Commemorative article dedicated to the 90^th anniversary of the outstanding Russian scientist and organizer of science, academician of the Russian Academy of Sciences Alexander Sergeevich Isaev.

Tests and calculations were carried out, shear characteristics of the dump mass were estimated, taking into account several variants of landslide formation. The research results allowing to optimize the design parameters of external dump formation with a significant economic benefit are presented.

In this paper, the range of angles of the velocity vector of incoming air flow relative to the cross-sectional axis of ventilation connection between tunnels is determined by computational methods. Based on the data obtained, recommendations are given for the most rational dimensions, spatial location and installation angle of dust filter panels in the ventilation connection between tunnels.

In this paper, an approach to create reversible mine axial fan with inlet guide vanes is considered. In this approach, the guide vanes rotate and operate as an impeller in the reverse mode, while the impeller slows down and works as guide vanes. To increase the operating efficiency in the reverse mode, the blades of the impeller and inlet guide vanes are turned at certain angles not exceeding 65°. To determine the turning angles of blades in the reverse mode, theoretical dependences were used, according to which the angles of flow rotation in flat gratings composed of blade profiles were calculated at the middle radius. The range of turning angles of the blades for the reverse mode is determined for fan configurations with a hub tip ratio of 0.6 at different flow and theoretical pressure coefficients. The characteristic in the reverse mode is numerically determined by the example of one fan.

The relevance of studying short-period rock displacements and estimating the stress-strain state of the rock mass in rockburst-hazardous deposits is shown. The observation procedure using satellite geodesy methods is set forth. The results of continuous hours-long monitoring the shear of the Earth’s surface at the Tashtagol deposit for the period of 2006 - 2020 are presented. The features of the development of short-period displacements during seismic activity manifestation of the rock mass in the deposit area are revealed. The dependence of the energy of seismic events on the velocities of short-period displacements is determined. This observation method is prospective in geodynamic test sites to assess the seismic activity of deposits.

The paper presents the results of computational modeling of evaporative cooling of tunnel air during the phase transition of water from a liquid to a gaseous state in subway tunnel conditions at various parameters of spraying equipment. It is shown that this method significantly reduces the requirements for ventilation equipment in comparison with the method of removing heat excesses by ventilation alone. To remove heat excesses by ventilation alone, the capacity of one fan (with two fans running in parallel) is up to 269 m³/s, and the power is 727 kW. When using evaporative air cooling, the maximum capacity of one fan is 67.5 m³/s with a power of 104 kW, the pump power does not exceed 50 kW with a maximum water flow rate of 1.5 m³/h.

The idea of selecting and justifying the technology options based on a rating approach to the analysis of determining factors for the safety and efficiency of mining operations is considered with regard to the class of mining systems with caving of ore and enclosing rocks. A formalized method of the scoring system has been developed, which makes it possible to quickly make decisions regarding the use of geotechnologies based on the predicted stability of mine workings, the amount of losses and dilution of ore, taking into account the value of recovered minerals. The domain of rational influence of sublevel and block caving in different mining, geological and geomechanical conditions has been determined.

The results of studying aerodynamic processes taking place in extended blind drifts are presented. The change in local aerodynamic resistance of area under study is shown at the supply and suction modes of mine ventilation. Based on the results of computational modeling, it is shown that sepa-rately installed longitudinal partitions allow ventilating blind drifts (up to 100 m) without using lo-cal mechanical ventilation due to the resulting ejection effect.

The set of complicating natural and technogenic factors affecting the formation of geomechanical processes and sustainability of mine workings during intensive mining of coal deposits by an underground method was classified. An assessment of their influence was carried out on the basis of a probabilistic-statistical method using total probability formula of Bayesian hypotheses.

A scientific approach to determining the width of stable coal pillars during the preparation and mining of extraction panels with a load of more than 15 thou t/day has been substantiated. The proposed procedure differs from the traditional one by taking into account the advance rate of stoping and development faces, the time of maintaining the development workings, the effect of dynamic support pressure during the hanging and caving of undermined roof rocks of neighboring extraction panels.

The technology of laying rubble concrete filling masses is considered. The properties of artificial pillars have been determined depending on the enclosing rocks extracted during the excavation of mine workings at the Veduginskoye and Perevalnoye deposits. Based on the results of numerical modeling of stress-strain state of the rock mass during the development of chamber mining system with ore breaking from sublevel workings and formation of rubble concrete pillars, main design features of the technology of ore deposit extraction are determined. Safe parameters of the mining system with a combined backfill for the development of the Veduginskoye field are recommended, taking into account the depth of stoping.

Two-component compositions based on polymersilicates and polyurethanes, developed to strengthen destroyed rocks and create impermeable inclusions in the rock mass, were studied in laboratory conditions. The rheological properties of liquid components of polymer compositions for the temperature conditions of underground mining of solid minerals, physical and mechanical characteristics of hardened polyurethane and organomineral compositions have been determined.

This paper presents the results of testing prismatic samples made of mudstone with a hole in the center under uniaxial compression before destruction using the test-measurement complex designed for synchronous recording of stresses, strains, temperature field and microseismic emission parameters. The changes in these physical parameters have been analyzed at different stages of sample deformation. Evolution of the deformation process - the appearance of micro-damages, their localization in the area of future destruction and the appearance of a main crack - leads to a significant change in the spectral composition of microseismic emission signals, micro-deformation field and the temperature field. A temperature increase in the region of the future main discontinuity and generation of powerful low-frequency harmonics under loads approaching the peak can be a forerunner of discontinuity on the surface and, as a consequence, of geomaterial destruction.

A technique for studying the movement of the body of a percussion device under the action of a shock load is presented, during which its displacement was recorded simultaneously with an accelerometer and a displacement sensor. The results of double integration of acceleration and their comparison with the displacement recorded by the displacement sensor are presented. The incorrectness of the acceleration graphs of the body displacements in amplitude and direction obtained with double integration of oscillograms is noted. When displacing along the ordinate axis of the first half-wave of the acceleration oscillogram recorded upon impact, it is possible to significantly improve the integration result. The value of displacement is selected in such a way that displacement of the body after the end of striker impact remains unchanged.

The paper presents main features of a laboratory setup for modeling hydraulic fracturing in large-sized cubic samples with independent triaxial loading and prototypes of downhole tools for its implementation. The test cell of the setup is demountable, which allows for easy access to the sample after the end of the experiment. The design of a fracturing tool with compression packers and adjustable interpacker interval for creating longitudinal and transverse cracks has been developed. Three variants of non-removable fracturing tools installed in a sandcrete block during its pouring have been tested.

The possibility of using pneumatic percussion machines for the implementation of adaptive technological processes and operation as part of robotic systems is considered. Taking into account the analysis of existing pneumatic percussion machines, a design diagram of pneumatic impact device with an elastic valve and a movable branch pipe is developed. A simulation model of the new pneumatic impact system is constructed and the operating cycle is investigated.

The dependence of the simulation pulse removal from the primary transducer with respect to the values of amplitude and duration parameters has been determined. This dependence can be used to calculate the energy component of an acoustic emission event and to develop an additional criterion for a more reliable assessment of rockburst hazard level in local sections of the rock mass using a local control device Prognoz- L.

The relevance of using pneumatic hammers in the construction of underground structures is justified. The dependence of the energy value of a single blow of a pneumatic hammer on the diameter of a pipe to be driven is proposed. The resistance forces from the side that occur during hammering the steel pipe are determined. As the main technical parameter of a pneumatic hammer, the weight of its striking part is proposed. The features of the device and technical characteristics of pneumatic hammers with a variable power structure are given. The practical experience of vertical pipe driving in the construction of piled foundations is described. Technological operations for the construction of retaining walls in the ground based on the use of steel sheet piles, pipes, channels, I-beams, etc. are considered. Methods of placement and arrangement of technological equipment for fixing a pneumatic hammer on a steel pipe driven into the ground are given.