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Abstract The Fourier harmonics, $$v_2$$ v 2 and $$v_3$$ v 3 of negative pions are measured at center-of-mass energy per nucleon pair of $$\sqrt{s_{\textrm{NN}}}$$ s NN = 17.3 GeV around midrapidity by the CERES/NA45 experiment at the CERN SPS in 0–30% central PbAu collisions with a mean centrality of 5.5%. The analysis is performed in two centrality bins as a function of the transverse momentum $$\mathrm {p_{\textrm{T}}}$$ p T from 0.05 GeV/c to more than 2 GeV/c. This is the first measurement of the $$v^{1/3}_{3}/v^{1/2}_{2}$$ v 3 1 / 3 / v 2 1 / 2 ratio as a function of transverse momentum at SPS energies, that reveals, independently of the hydrodynamic models, hydrodynamic behavior of the formed system. For $$\mathrm {p_{\textrm{T}}}$$ p T above 0.5 GeV/c, the ratio is nearly flat in accordance with the hydrodynamic prediction and as previously observed by the ATLAS and ALICE experiments at the much higher LHC energies. The results are also compared with the SMASH-vHLLE hybrid model predictions, as well as with the SMASH model applied alone.

Cereals and legumes have a porous structure, being an inert carrier during mass exchange processes; they contain voids in the form of pores and stomata, on the surface of which there are foreign extractable substances in a solid state, in particular, trypsin and urease inhibitor proteins. These substances, due to their harmful effect on the final product, are subject to removal by extraction. One of the methods for inactivating anti-nutritional substances is ultrasonic treatment of soybeans.The article discusses the technology of inactivating inhibitors that worsen food and protein value of vital soybeans. The developed technology was aimed at dissolving a solid substance - soybean inhibitor protein in a liquid, carried out due to molecular diffusion, intensifying the processes of mass transfer and mass return. When creating a suspension by mixing the solid (crushed soybean grain) and liquid (water) phases, water molecules, which are a solvent, penetrate under the action of capillary forces into the pores and stomata of the treated body, begin to penetrate. On this basis, technological directions of research have been established, a sequence has been built and the physical essence of operations has been substantiated, consisting of four main ones - grinding soybean grain, creating a “water-soybean” suspension, ultrasonic (US) treatment of soybeans, drying. As a result of the conducted research, optimal technological parameters have been established for intensifying the process of inactivation of anti-nutritional substances contained in native soybeans: the degree of grinding of soybean grains is 0.5-1.0 mm; the ratio of water-soy suspension (1:1). The efficiency of the developed technological process will be factors affecting the quality of the resulting products, the duration and energy intensity of the process, resource conservation, simplicity of design and low cost of manufacture, the possibility of automation.

The purpose of the current study was to estimate the adaptive potential of four varieties and three lines of spring durum wheat developed by the FSBSI FRARC based on the results of their testing in the steppe part of the Rostov region in 2020–2023. The estimation of ecological adaptability and stability of the varieties and lines was conducted according to the method of S. A. Eberhart, W. A. Russell as presented by V. A. Zykin; homeostatic indicator was identified according to V. V. Khangildin. There has been presented an estimation of varieties and lines according to their productivity, environmental stability, adaptability, and technological indicators of grain. There was found that the mean productivity of the varieties and lines was 3.44 t/ha, varying over the years from 1.81 to 4.72 t/ha. The varieties ‘Donskaya lazorevaya’ and ‘Volnodonskaya zolotistaya’ formed the maximum mean productivity over the years with 3.52 and 3.58 t/ha. They were characterized by the greatest stability and adaptability, with a low coefficient of variation (3.6 and 2.4 %, respectively) and the greatest homeostaticity (42.37 and 67.06). There was found out that ‘Volnodonskaya zolotistaya’ was a variety that combined high indicators of adaptability, stability and homeostaticity (bi = 1.08; Si2 = 0.016; Hom = 42.37). The variety ‘Volnodonskaya’ and the lines ‘Gord.4699/19’, ‘Gord.4924/20’ and ‘Gord.4465/21’ were characterized by full compliance of the productivity level with changes in cultivation conditions with a regression coefficient bi ≤ 1. The line ‘Gord.4699/19’ was characterized by the greatest stability in productivity (Si2 = 0.007). The regression coefficient (bi) was 0.93, homeostaticity was 67.06, which also indicated its high ecological adaptability. In terms of protein percentage in grain, almost all varieties and lines met the requirements of the 1st class of GOST 9353-2016. Gluten content varied from 20.0 to 25.5 % (the 2–4 class). According to the comprehensive estimation of productivity and grain quality, and adaptability parameters in the conditions of the steppe part of the Rostov region, there have been identified the varieties ‘Donskaya lazorevaya’, ‘Volnodonskaya zolotistaya’ and the line ‘Gord.4699/19’, recommended for breeding for productivity and grain quality.

This paper is devoted to the comprehensive study of the problem of responsible knowledge management and the development of information systems in the conditions of the digital economy from the position of the ESG system. It points to the relevance of the problem of knowledge management in the conditions of modern challenges, characterises processes connected with knowledge management from the position of sustainable development, and points to the potential of information systems and digital technologies from the position of the perspective of intellectual potential development. The methodological framework of the research is comprised of general economic and special research methods. They are founded on the interconnected categories of responsible knowledge management, social responsibility, sustainable development, etc. To justify the offered hypothesis, the methods of correlation & regression analysis and empirical methods of analysis, synthesis, generalisation, and observation were used. The main value of this paper lies in the scientific substantiation of the fact of ambiguity in the assessment of the influence of the processes of sustainable and intellectual development on the economic state of Russia. According to this, the irrationality of financing scientific and innovative developments was established, and the expedience of stimulating the further implementation of information systems and technologies of knowledge management into the practice of companies’ activities was determined.

In this paper, we elaborated on the features of the formation of knowledge and information systems management in the countries that are leaders in this sphere and assessed the influence of their transformations on the innovativeness of the digital economy. The goal of this work was to find the key features of the contribution of the components of knowledge and information systems management to the improvement of the innovative development and digitalization of countries. We revealed that achievement of high results in these components is possible in case of the formation of a favourable environment for them, the key position in which belongs to Internet quality and coverage and government support. The presented ways to search for opportunities for implementing infrastructural projects in the creation of favourable conditions for the implementation of knowledge and information systems management will allow developing economies to ensure significant growth. The novelty of this research is connected with the determination of the features of knowledge and information systems management, which allow countries to ensure growth in the sphere of innovations and the digital economy.

The radiation pattern within high energy quark- and gluon-initiated jets (jet substructure) is used extensively as a precision probe of the strong force as well as an environment for optimizing event generators with numerous applications in high energy particle and nuclear physics. Looking at electron-proton collisions is of particular interest as many of the complications present at hadron colliders are absent. A detailed study of modern jet substructure observables, jet angularities, in electron-proton collisions is presented using data recorded using the H1 detector at HERA. The measurement is unbinned and multi-dimensional, using machine learning to correct for detector effects. All of the available reconstructed object information of the respective jets is interpreted by a graph neural network, achieving superior precision on a selected set of jet angularities. Training these networks was enabled by the use of a large number of GPUs in the Perlmutter supercomputer at Berkeley Lab. The particle jets are reconstructed in the laboratory frame, using the kT jet clustering algorithm. Results are reported at high transverse momentum transfer Q2>150GeV2, and inelasticity 0.2

This paper elaborates on the problem of quality management at the company, which is implemented through sustainable HRM, which, in turn, is based on digital competencies. In the process of the research, we disclose the modern understanding of quality, characterise the specifics of sustainable management labour resources, and determine the important role and parameters of digital competencies. The basis of the methodology of this research is the concept that is aimed at combining the spheres of digital competence, sustainable HRM, and quality management, which allows strengthening and expanding the opportunities for ensuring quality at the company. The result of this research is the determination of positive effects and interconnection between digital competencies, sustainable HRM and the system of quality management. Characteristics of these facts allowed identifying the key advantages of the proposed integration of the sub-systems of management, which are based on fuller use of digital solutions in business, learning, and quality management. According to this, we determine the relevance of the company's personnel acquiring digital competencies and their complete use within the sustainable management of human resources, which will allow for a substantial increase in the level of quality management at the company.

This work strived to solve an important scientific problem of developing methodological recommendations on decision-making in the sphere of product quality management with the help of innovations. According to this, the paper generalised and supplemented the methodological provisions of the theory of managerial decision-making given the specifics of the processes of quality management and the use of innovations and characterised the influence and value of new ideas and solutions on the quality of products and the general effectiveness and competitiveness of the company. The paper also substantiated the important role of innovations from the position of their influence on the quality of products and considered the system of quality management based on innovations, which includes technical and social components, in particular, the cycle of innovations of quality, tools and methodology of ensuring quality, on the one hand, and the principles of quality management and culture of quality and learning, on the other hand. Special attention was paid to the necessity to take into account - when developing managerial decisions - the complex economic and market proportions through modelling of the appropriate strategies based on game theory methods. This allows considering not only the factual parameters of price, quality, and expenses but also modelling their influence on the general market situation, including the behaviour of rivals and consumers.

Landslides are one of the most frequent natural disasters that cause significant damage to property in Vietnam, which is characterized by mountainous terrain covering three-quarters of the territory. In 17 northern mountainous provinces of the country, over 500 communes are at a high to very high landslide hazard. The main goal of this study was to establish landslide hazard maps and conduct a comparative evaluation of the efficiency of the methods employed in Tinh Tuc town, Cao Bang province. The landslide hazard assessment was carried out in this study using the combined Fractal-frequency ratio (FFR) and the Frequency ratio (FR) methods. The FR method is based on the actualist principle, which assumes that future landslides may be caused by the same factors that contributed to slope failure in the past and present. The FFR method is based on the determination of the fractal dimension, which serves as a measure of the landslide filling density in the study area. Eight landslide-related factors were considered and presented in cartographic format: elevation, distance to roads, slope, geology, distance to faults, land use, slope aspect, and distance to drainage. Determining the area under the receiver operating characteristic curve (ROC-AUC) and verification index (LRclass) was performed to assess the performance of prediction models and the accuracy of the obtained maps. As a result, five zones were identified for the study area, characterized by very low, low, moderate, high, and very high landslide hazards. The analysis of the reliability of the obtained landslide hazard maps using the AUC and LRclass indices revealed that the FFR model has a higher degree of reliability (AUC = 86 %, LRclass = 86 %) compared to the FR model (AUC = 72 %, LRclass = 73 %); therefore, its use is more effective.

Abstract The H1 Collaboration reports the first measurement of the 1-jettiness event shape observable $$\tau _1^b$$ τ 1 b in neutral-current deep-inelastic electron-proton scattering (DIS). The observable $$\tau _1^b$$ τ 1 b is equivalent to a thrust observable defined in the Breit frame. The data sample was collected at the HERA ep collider in the years 2003–2007 with center-of-mass energy of $$\sqrt{s}=319\,\textrm{GeV} $$ s = 319 GeV , corresponding to an integrated luminosity of 351.1 $$\textrm{pb}^{-1}$$ pb - 1 . Triple differential cross sections are provided as a function of $$\tau _1^b$$ τ 1 b , event virtuality $$Q^{2}$$ Q 2 , and inelasticity y, in the kinematic region $$Q^{2} >150\,\textrm{GeV}^2 $$ Q 2 > 150 GeV 2 . Single differential cross sections are provided as a function of $$\tau _1^b$$ τ 1 b in a limited kinematic range. Double differential cross sections are measured, in contrast, integrated over $$\tau _1^b$$ τ 1 b and represent the inclusive neutral-current DIS cross section measured as a function of $$Q^{2}$$ Q 2 and y. The data are compared to a variety of predictions and include long-standing and more recent Monte Carlo event generators, predictions in fixed-order perturbative QCD where calculations up to $$\mathcal {O}(\alpha _\textrm{s} ^3)$$ O ( α s 3 ) are available for $$\tau _1^b$$ τ 1 b or inclusive DIS, and resummed predictions at next-to-leading logarithmic accuracy matched to fixed order predictions at $$\mathcal {O}(\alpha _\textrm{s} ^2)$$ O ( α s 2 ) . These comparisons reveal sensitivity of the 1-jettiness observable to QCD parton shower and resummation effects, as well as the modeling of hadronization and fragmentation. Within their range of validity, the fixed-order predictions provide a good description of the data. Monte Carlo event generators are predictive over the full measured range and hence their underlying models and parameters can be constrained by comparing to the presented data.

Industrial hemp (Cannabis sativa L.) is a multifunctional raw material with a wide spectrum of applications. A huge interest in hemp has arisen in the food industry comparatively recently. Seeds and cake of hemp have the high protein content (20.00-38.70% and 27.90-40.70%, respectively), which makes them a promising raw material for production of concentrates, isolates, and hydrolysates for the food industry. Hemp cake is distinguished by the high content of fiber (17.41-60.38%) and can be used as a prebiotic component of food. In terms of the amino acid content, the amino acid composition of hemp exceeds the corresponding indicators of the reference protein recommended by WHO. The content of lysine is the only indicator, in which hemp protein is inferior to the “ideal” protein. Digestibility of protein of hulled hemp seeds is in a range from 90.8% to 97.5%, which is comparable to digestibility of casein. Digestibility of hemp isolate is 88-91%, which is 21.9% higher than that of soy protein isolate. Peptides and amino acids contained in hydrolysates of hemp protein can show the high biological activity. Hydrolysates attract interest among researchers not only because of their bioactivity but also because of their high digestibility and nutritional value. Targeted proteolysis is a tool that facilitates an improvement in the functional-technological properties of protein. Seeds and cake are a promising raw material for using in food technologies to produce vegetable oil, dietary fiber, protein preparations and functional products. The aim of this paper is to analyze the main methods for industrial hemp processing and promising directions of using protein products from waste of hemp oil production in the food industry.

The moisture content (MC) of wheat seeds must be reduced before storage using appropriate dehydration processes. Desiccant drying is a promising alternative to conventional drying methods because it improves seed quality while providing overall energy efficiency. This study explores the sorption drying of wheat seeds using granulated kieserite MgSO4·H2O as a solid desiccant, which has a high water capacity and is regenerated at low temperatures

Abstract The Breit frame provides a natural frame to analyze lepton–proton scattering events. In this reference frame, the parton model hard interactions between a quark and an exchanged boson defines the coordinate system such that the struck quark is back-scattered along the virtual photon momentum direction. In Quantum Chromodynamics (QCD), higher order perturbative or non-perturbative effects can change this picture drastically. As Bjorken-x decreases below one half, a rather peculiar event signature is predicted with increasing probability, where no radiation is present in one of the two Breit-frame hemispheres and all emissions are to be found in the other hemisphere. At higher orders in $$\alpha _{s}$$ α s or in the presence of soft QCD effects, predictions of the rate of these events are far from trivial, and that motivates measurements with real data. We report on the first observation of the empty current hemisphere events in electron–proton collisions at the HERA collider using data recorded with the H1 detector at a center-of-mass energy of 319 GeV. The fraction of inclusive neutral-current DIS events with an empty hemisphere is found to be $$0.0112 \pm 3.9\%_\text {stat} \pm 4.5\%_{\text {syst}} \pm 1.6\%_{\text {mod}}$$ 0.0112 ± 3.9 % stat ± 4.5 % syst ± 1.6 % mod in the selected kinematic region of $$150

The need of switch to burn non-design fuel arises during the thermal power plants long-term operation. The choice of replacing coal is quite complicated and currently being solved by various non-design fuels experimental combustion on a specific power boiler. The aim of the work is to develop criteria assessing non-design coal burning possibility in a specific furnace before experimental combustion. The stated goal is achieved with the help of numerical combustion modeling regarding various coals at the pre-critical parameters boiler furnace with an average composition ranking by the lower calorific value. 2 burning ratios have been proposed based on foreign experience: the fuel ratio and the degree of fuel burnout. The first is the ratio of the fuel carbon to volatile substances contents, which in this work are taken as an analytical mass. The second is calculated with the proposed formula, which, instead of the combustible content in fly ash, use mechanical underburning widely included in the technical calculations. Combustion zones with the degree of the acceptable fuel burnout according to the standards and with its excess are distinguished. The limit of possible coal combustion according to the fuel coefficient is found as well. It is shown that this furnace is quite universal for burning a wide range of coals, although it was originally designed for burning brown coal. It is not recommended to burn only lean and low-caking bituminous coals, anthracites and brown coals with calorific value less than 11.5 MJ/kg or humidity more than 40%. The obtained results are significant for the preliminary assessment of non-design fuel combustion and narrowing the range of fuels under consideration. Other the boiler conversion consequences for non-design fuel should be taken into account for the final decision, and above all, the probability of the heating surfaces slagging.

Introduction. Devices for collecting and storing energy from the external environment are low-power sources of electric energy that are actively used. The autonomous devices for monitoring the damaged condition of various structures include them as well. The working element of these devices is a piezoelectric generator (PEG) — a converter of mechanical energy into electrical energy. The design of PEG is associated with the preliminary construction of their mathematical and computer models, with the help of which the calculation and optimization of structures is carried out. One of the ways to model and calculate PEG is to develop approximate calculation methods based on applied theories. The applied theories for calculating bending vibrations of multilayer piezoactive plates are known and previously developed in the literature. However, in the scientific literature there is not enough information about bending and shear vibrations as a tool for improving the efficiency of engineering calculations of the described structures. The objective of this work was to develop an applied method for calculating bending and shear vibrations of piezoceramic plates, including porous ones.Materials and Methods. Piezoceramics PZT-4, including porous ones, were used as the piezoactive material of the plate. When using porous ceramics, the rigidity of the structure decreased to a greater extent than the piezoelectric modules, which made it possible to obtain a more effective PEG under mechanical action. The mathematical formulation was carried out within the framework of the linear theory of electroelasticity with plate polarization in thickness. The sides of the plate were electrodated, the right side was fixed, and a smooth contact in the vertical wall was set on the left side. Steady-state vibrations of the plate were caused by pressure on the front surfaces of the plate or the difference in electrical potentials at the electrodes. To calculate the characteristics of PEG, the authors proposed an applied theory based on hypotheses about the distribution of characteristics of the stress-strain state and the electric field.Results. Transverse vibrations of a piezoceramic plate in the low-frequency region (below the first bending-shear resonance) were studied. Due to the fact that the mathematical formulation was considered within the framework of the linear theory of elasticity, the problem was divided into the sum of two. The first one took into account the mechanical effect: a distributed load and a transverse force at the left end acted on the front surfaces of the plate, and the potentials at the electrodes were zero. In the second task, there were no mechanical loads, but the potential difference was set at the electrodes. Based on hypotheses about the distribution of deformations, mechanical stresses and electric potential, both problems were reduced to a system of ordinary differential equations and boundary conditions. Comparison with the results of calculations by the finite element method in the ACELAN package showed the adequacy of the proposed applied theory in the low-frequency region.Discussion and Conclusion. Since the formulation of the problem was considered in the linear theory of electroelasticity, and the low-frequency region was studied, the work succeeded in dividing the problem of bending-shear vibrations of a porous piezoceramic plate into two: bending — with mechanical action at zero potentials, and shear — when setting the potential difference and zero mechanical action. The corresponding hypotheses about bending and shear were used. Two systems of ordinary differential equations and boundary conditions, which were solved analytically without the use of “heavy” finite element packages, were constructed. To compare the results and confirm the adequacy of the proposed method, the finite element modeling of such tasks was carried out in a specialized ACELAN package. The comparison showed that the error in determining displacements and electric potential when using this approach, in the case of setting mechanical loads and potential differences, did not exceed 6%. The method developed in the paper can be applied in the design of piezoelectric generators for energy storage in the low-frequency region.

The present study investigates the physical and chemical characteristics, behavior in vitro and in vivo, and biocompatibility of coatings containing Ta2O5, which are obtained by plasma electrolytic oxidation (PEO) on MA8 magnesium alloy. The obtained coatings demonstrate in vivo biocompatibility and in vitro bioactivity. Compared to the base PEO coating, the layers containing Ta2O5 facilitate the development of apatite in simulated body fluid, suggesting that the inclusion of nanoparticles improves bioactivity of the coatings. It was found that incorporation of Ta2O5 nanoparticles increases roughness and porosity of the formed layers by increasing particle concentration in electrolytes for the PEO process contributing to sufficient soft tissue ingrowth in vivo. Based on in vivo studies, these coatings also provide favorable tissue response and minimal inflammatory reaction in comparison with the bare magnesium alloy due to protection of living tissues from deleterious corrosion events of magnesium implant such as local alkalization and intense hydrogen evolution. The results obtained in the present study concluded biocompatibility, tissue integration of the PEO coatings containing Ta2O5 nanoparticles making them a promising protective layer for biodegradable magnesium implants.

Within the framework of the study of the parameters of the internal environment in relation to the level of economic sustainability, the article presents the main strategies aimed at increasing the level of integrated economic sustainability of an enterprise structure in the face of crisis situations and phenomena. These strategies include: the strategy of preserving the existing level of economic sustainability by ensuring the stability of business processes, the strategy of accelerated growth of the level of economic sustainability due to increased demand for the goods and services sold, the strategy of growth by using the "advantages" of the consequences of crisis phenomena, and a number of others. The article proves that the formation of integrated economic sustainability occurs through active interaction and mutual influence of management strategies and professional competences of economic behaviour of an entrepreneurial entity. Increasing the efficiency of this complementary organisational process contributes to increasing the level of sustainability and the ability to ensure stable and balanced functioning of the business structure in the face of crisis phenomena of a completely different nature and impact. Objective. A comprehensive study and further systematic development of the theory and methodology of strategic management of economic sustainability of business structures in the context of developing corporate strategies is timely and relevant. Methodology. The methodological basis of the study was formed by the provisions of the systemic approach and analysis, a synergistic approach to assessing the essence of sustainability as a separate scientific category, and a process approach in the context of developing methodological provisions for ensuring the integrated economic sustainability of business structures. Practical implications. The competencies of economic behaviour of business entities described and analysed above can be correlated both with the peculiarities of doing business in a stable market system and with the impact of crisis phenomena (by analogy with the first methodological approach to assessing the integrated economic sustainability of an enterprise structure). Value/Originality. The article identifies and characterises key directions of the state policy aimed at ensuring economic sustainability of entrepreneurial structures, including in the context of the current crisis.

The article discusses the issue of effective training for crime prevention and detection among Ukrainian police officers. Notably, it requires professional knowledge and skills to be developed at a certain level, which means the need for high professional development and a certain level of self-awareness. Thus, training, retraining, and morale of the future specialist are some of the determinatives for the successful completion of the missions that police encounter. Special features of the professional identity of the future police specialist have not been defined and structured yet. The purpose of this study is to highlight the empirical study on professional self-awareness findings, which cover its content and structure, as well as to analyse the authorial model of content and structural components of professional self-awareness among future police professionals that was developed for studies in higher educational institutions. The study analysed the problem of future police officers' professional identity and devotion to the organisation. The main research methods included the methods of S. Schwartz's theory of basic human values; methods of R. Cattell's 16 personality factor model; methods A. Rean and V. Yakunin's diagnostics of the motives of students' learning in modification of N. Badmaeva; methods of V. Stephenson's "Q-sorting" in diagnosing the main trends of behaviour in a real group and ideas about themselves; A. Zverkova and E. Eidman's test of volitional self-control; R. Schwarzer and M. Jerusalem's scales of general self-efficacy; methods of N. Hall's emotional intelligence diagnostics, analysis of the collected data. As a result, during the period of professional training in accordance with the programme methodology established by the authors, future police officers of the control sample developed such personal and social qualities as work capacity, proactivity, respect for social norms and adherence to them.

Aim. To evaluate the changes of cell-free DNA (cfDNA) levels before and after percutaneous coronary intervention (PCI) in patients with ST-segment elevation acute coronary syndrome (STE-ACS). To identify associations of cfDNA concentration before and after PCI with complications and length of ulcerated plaque in patients with STE-ACS.Material and methods. This prospective single-center observational pilot study included 44 patients with STE-ACS admitted to the cardiac intensive care unit during the period of May-August 2023. In all patients, along with standard laboratory tests, cfDNA level was measured upon admission and 24 hours after PCI. Assessment of cfDNA associations before and after PCI was carried out in relation to following significant complications and conditions in STE-ACS patients: death, acute left ventricular failure (ALVF), acute heart failure (AHF), arrhythmia, number of stents implanted, number of segments with impaired local contractility, total stent length.Results. The mean age of the patients was 60,6±9,6 years, of which 74,6% were men. TIMI 0-1 flow was recorded in 93,2% of the subjects. The most common complications were cardiogenic shock (18,4%), arrhythmia (16,9%), AHF (13,6%), ALV (11,9%). Death was recorded in 8,5%. Implantation of 1 stent in PCI was performed in 75% of cases, while in the rest, 2 or more stents were implanted. The proportion of patients with impaired local contractility was 90%, the median stent length was 24,0 (20,0-50,0) mm. CfDNA level on admission did not differ from level after PCI 94,5 (78,3-155,5) ng/ml vs 115,0 (71,0-152,0), p=0,46. However, it signi­ficantly exceeded the cfDNA concentration from a group of healthy volunteers (78,0 (59,7-106,0), p=0,017). Characteristic curve showed significant relationships both for the concentration of cfDNA before (with implantation of 2 or more stents (AUC 0,71 with 95% confidence interval (CI) 0,56-0,86, p=0,039), stent length >24 mm (AUC 0,73 with 95% CI 0,58-0,89, p=0,009)) and after PCI (with the number of impaired local contractility segments (AUC 0,73 with 95% CI 0,57-0,89, p=0,014)). If the cfDNA level before PCI was >90 ng/ml, the risk of implantation of 2 or more stents per procedure increased by 5,4 times (odds ratio (OR) 5,4, 95% CI 1,11-28,93, p=0,044). The risk of a stent length >24 mm with pre-PCI cfDNA >107 ng/ml increased 9-fold (OR 9,0 with 95% CI 2,2-36,9, p=0,001), and the cfDNA level after PCI >105 ng/ml increased the risk of impaired local left ventricular (LV) contractility in 2 or more segments by 5 times (OR 5,0, 95% CI 1,23-20,3).Conclusion. In the studied group of patients with STE-ACS subject to intervention, the cfDNA concentration before PCI was associated with the implantation of ≥2 stents and the stent length (>24 mm). CfDNA level before PCI was associated with the number of segments of impaired local LV contractility (≥2).