bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of particularities of the stress-strain state of the sandy basis under loading conditions of rough stamps
Authors: Skibin G M 
Published: June 2021

Abstract
The analysis of the results of the experimental researches conducted in Platov South-Russian State Polytechnic University (Novocherkassk Polytechnic Institute), in conditions of tape and axisymmetrical basis loadings permits to identify general patterns of the sand basis operating in case of different loading conditions, to consistently trace the development of ranges of strains, compaction and decompaction and the formation of a condenced core under stamps and to assess this process with the phases of the stress - strain state of the basis.
Method for studying the kinetics of plastic deformation and energy dissipation during fatigue of structural materials
Authors: Zakharchenko K V , Kaygorodtseva A A , Kapustin V I , Shutov A V 
Published: June 2021

Abstract
The evolution of mechanical properties of Russian steel St3 subjected to cyclic elasto-plastic deformation is analyzed under a broad spectrum of loading conditions. This particular material is chosen due to its wide use in industrial facilities operating in Arctic and Russian North. Basic state parameters are determined, including the true strains, secant and tangent moduli, heat generation due to plastic dissipation, thus characterizing the evolution of the thermo-mechanical state. The temporal evolution of kinetic parameters during each loading block provides insights into the hardening and damage accumulation. These data form an experimental basis for development, calibration, and validation of new material models. The main effects are identified and discussed, and the modelling approaches are assessed.
Formation of ceramic targets for solid electrolytes sputtering
Authors: Kunshina G B , Bocharova I V , Ivanenko V I 
Published: June 2021

Abstract
The results of ceramic targets formation from powders of Li1.3Al0.3Ti1.7(PO4)3 and Li6.4Al0.2La3Zr2O12 solid electrolytes by cold pressing with subsequent high-temperature sintering are presented. Solid electrolyte powders of Li1.3Al0.3Ti1.7(PO4)3 (LATP) with the NASICON structure and Li6.4Al0.2La3Zr2O12 (LLZ) with the garnet structure with high Li-ion conductivity were synthesized by methods protected by patents in the RF, suitable for mass production. The conditions for the formation of dense single-phase targets (14 mm in diameter and 8-10 mm thick) from LATP and LLZ (cubic modification) solid electrolytes were established by X-ray diffraction analysis. The ionic conductivity, Li+ ion transfer number and electronic conductivity of LATP and LLZ ceramic targets were determined by electrochemical impedance spectroscopy and potentiostatic chronoamperometry methods.
Materials Microencapsulation Applications in Oil Drilling and Production
Authors: Orlov M V 
Published: June 2021

Abstract
Advancing the materials used in oil drilling and production has significantly augmented the industry’s efforts to improving the processes and preventing the operations failures. Presently, oil drilling and production demand that materials do not simply demonstrate better performance, but also possess some degree of intelligence. The intelligence is induced to the materials by preprogramming a certain response to a change in the surrounding conditions to trigger the function of the used materials. This improves the performance and prevents possible physical damage or mitigates negative changes in the downhole environment during production. Smart responsive microcapsules, with the ability to self-heal the materials, delayed and targeted active release, and could become a viable solution for the challenges the oil drilling and production industry is currently facing. This paper provides an overview of the benefits that a microencapsulation technique has demonstrated when applied to the materials involved in oil drilling and production. It outlines possibilities for improving the well drilling process when products containing microcapsules are applied. Several examples demonstrating the ability to perform downhole treatment seamlessly with pre-designed microcapsules are embedded. The paper puts emphasis on developing smart self-healing materials by integrating microcapsules into the cement sheath as well as the coatings of steel pipes to mitigate costly failures. Finally, the paper shows examples of some outstanding results of microencapsulated materials when applied to the most advanced research areas in the oil industry such as enhanced oil recovery (EOR) and hydraulic fracturing.
Preparation of W-Cr powder via the magnesiothermic reduction of trirutile Cr2WO6
Authors: Kolosov V N , Miroshnichenko M N , Prokhorova T Yu 
Published: June 2021

Abstract
The process of producing W-Cr powders by the reduction of trirutile Cr2WO6 with magnesium vapor in the temperature range 700–850 °C at residual pressure of 5-20 kPa was studied. W-Cr powders with a specific surface area at the level of 43-47 m2⋅g−1 were obtained. The resulting W-Cr powders are characterized by a mesoporous structure.
Comparison of the structure and properties of samples from TI-6AL-4V alloy received on different printers for 3D printing
Authors: Skvortsova S V , Spektor V S , Ivanov A E , Trusov P A , Duvidzon V G 
Published: June 2021

Abstract
In this work, we compared the samples obtained by additive technologies. Samples for the study were printed on two different printers using similar DMLS and DMLM technologies. Printing was carried out according to the CAD model data. The printing was performed using the manufacturer’s recommended print settings. For printing, we used powders recommended by the manufacturer for these printer models. In the course of the work, the structure and roughness parameters in the initial state were compared. The heat treatment mode was selected. The effect of vacuum annealing on the structure as well as mechanical properties such as uniaxial tension, KCU and fatigue strength was investigated. Based on the results of the work, a conclusion was made about the improvement of 3D printing, as a result of which the products obtained using additive technologies after heat treatment are not inferior in properties to products obtained using industrial technology from a similar alloy.
Application of fragmentary model to analysis of the atomic structure of amorphous materials
Authors: Aleinikova K B , Zinchenko E N , Zmeikin A A 
Published: June 2021

Abstract
Experimental atomic radial distribution functions, obtained from diffraction amorphous materials, are proposed to be interpreted using the model curves built upon the complete structural data of crystal analogues or upon the separate fragments of their structure. This modelling technique is called a fragmentary model. A model atomic radial distribution function is a radial cross section of the spherically symmetric function of interatomic distances. It characterises a nanodispersed diffraction amorphous polycrystal as uniquely as the values of interplanar spacings and intensities characterise a regular polycrystal. Comparing the model and experimental atomic radial distribution functions by the maxima positions we can perform the “identification” and “phase analysis” of nanodispersed diffraction amorphous polycrystals and define the crystalline compounds whose fragments form the structure of glass.
Application of AFM, TEM, and NTA for characterization of exosomes produced by placenta-derived mesenchymal cells
Authors: Bagrov D V , Senkovenko A M , Nikishin I I , Skryabin G O , Kopnin P B , Tchevkina E M 
Published: June 2021

Abstract
Exosomes and microvesicles usually require characterization at the single-particle level. The most commonly used methods for this purpose are transmission electron microscopy (TEM) and nanoparticle tracking analysis (NTA). However, atomic force microscopy (AFM) is also a promising method for the characterization of exosomes, and its opportunities seem underestimated. Here we describe the characterization of exosomes isolated from the conditioned media of human placenta cells using AFM, TEM, and NTA; we focus on the technical aspects of AFM imaging and data processing.
Comparison of magnetic and mechanical properties of powder Fe-Cr-Co alloys with different cobalt content obtained at various sintering temperatures
Authors: Ustyukhin A S , Zelensky V A , Milyaev I M , Ankudinov A B , Shustov V S 
Published: June 2021

Abstract
In present work, we studied the effect of sintering temperature and thermomagnetic treatment (TMT) on the magnetic hysteresis characteristics of the Fe-30Cr-8Co, Fe-30Cr-12Co and Fe-30Cr-16Co (wt. %) powder alloys. All investigated powder alloys, sintered at temperature range of 1100-1400 °C have a high level of magnetic properties ensuring their technical application. The highest values of magnetic properties for all three investigated powder alloys are observed after sintering at 1350 °C: Br = 1,28 T, Hc = 44,3 kA/m, BH(max) = 39 kJ/m3-for Fe-30Cr-8Co alloy; Br = 1,28 T, Hc = 48,2 kA/m, BH(max) = 39,2 kJ/m3-for Fe-30Cr-12Co alloy and Br = 1,23 T, Hc = 54,9 kA/m, BH(max) = 37,6 kJ/m3-for Fe-30Cr-16Co alloy. For Fe-30Cr-8Co alloy it was observed that additional annealing at 500 and 480 °C slightly increases the magnetic properties. For Fe-30Cr-12Co and Fe-30Cr-16Co alloys, there is no clear tendency regarding the effect of additional annealing on the magnetic properties. Compression tests of powder alloys Fe-30Cr-8Co and Fe-30Cr-16Co sintered in the temperature range 1100-1400 °C have shown that the yield strength σ0.2 of the Fe-30Cr-16Co alloy samples (970 – 1080 MPa) are higher compared to the Fe-30Cr-8Co alloy (710 – 930 MPa) throughout the entire sintering temperature range but Fe-30Cr-8Co alloy have a better ductility compared with Fe-30Cr-16Co alloy. Maximum values of σ0.2 were obtained on samples sintered at 1100 °C.
Study in fatty acids of tall oils and their products of esterification by the method of IR spectrometry for analytical control of preparation of esters
Authors: Govorin A S , Konovalov N P , Gubanov N D 
Published: June 2021

Abstract
Tall oil fatty acids are a by-product of the sulfate pulping of cellulose. The field of application of tall oil fatty acids is currently limited to the production of polyhydric alcohol esters (glycerol, etriol, and pentaerythritol, primarily, for the production of alkyds); ethanolamides; disproportionated and dimer acids (including amides based on them); imidazolines; salts; as well as lower alkyl esters. However, tall oil fatty acids have the potential to be used as a basis for the synthesis of motor oils and their additives, additives to diesel fuel, as well as raw materials for the production of biodiesel fuel.
DFT modeling of concentration dependences of mixing energy, structural properties and distribution of atomic magnetic moments by Fe-V system sigma-phase lattices for the ground state
Authors: Kupavtsev M V , Udovsky A L 
Published: June 2021

Abstract
The region of existence of the sigma-phase of the Fe-V system was studied. The calculations carried out using the licensed package of quantum mechanical calculations WIEN2k. The dependences of the mixing energy and partial magnetic moments of Fe atoms in alloys of the Fe-V system, located on different sublattices depending on the composition, was obtained.
Magnetite concentrate from coal fly ash of Kashirskaya GRES- the raw material for the production of metal products by reduction smelting
Authors: Zinoveev D V , Delicyn L M , Ryabov Y V , Kulumbegov R V , Zakunov A S , Dyubanov V G 
Published: June 2021

Abstract
Coal fly ash is a hazardous waste of heat power engineering. The complex processing of it includes several stages, such as carbon flotation and magnetic separation of iron. This study focuses on carbon extraction by flotation method and iron by magnetic separation method from Kashirskaya GRES coal fly ash with subsequent reduction smelting of it. At optimal conditions were obtained carbon concentrate with 37% C and magnetic concentrate with 61% Fe2O3. The high-quality steelmaking pig iron with low P and S and high alumina slag were obtained at 1400 °C after reduction smelting mixture magnetic, and carbon concentrates.
Innovative technologies for growing of mini-tubers in virus-free potato seed production
Authors: Gerieva F T , Morgoev T A 
Published: June 2021

Abstract
The article describes the method of growing of potatoes mini-tubers in three ways: aeroponic, hydroponic and aero-hydroponic. All three modules were installed at the experimental sites of the North Caucasus Research Institute of Mountain and Foothill Agriculture. Studies have shown that the installed aero-hydroponic modules in plastic foil houses significantly increased the percentage of economic efficiency, since the cultivation of mini-tubers can be carried out in two turns: the first from April to July; the second from August to November.
Application of concrete modified with TiO2 to reduce anthracene concentration
Authors: Tatarinov D A , Sokolnikova S R , Myslitskaya N A , Puzatova A V 
Published: June 2021

Abstract
In this study, samples of fine-grained concrete with the additive T1O2 microparticles were made. The photocatalytic properties of TiO2 for the decomposition of anthracene in solutions under UV irradiation were studied. To evaluate the efficiency of photodegradation, the method of luminescence analysis was used. For improving the quality of the analyzed solutions, model surfaces were made based on chitosan with the addition of TiO2. According to the results of the experiments, it was found that the degree of photodegradation of anthracene in solutions using solid chitosan-TiO2 matrices reaches 74% after 60 minutes under UV irradiation. The conducted studies confirm the feasibility of using chitosan-TiO2 matrices as model surfaces for studying the photocatalytic properties of TiO2 for the oxidation of anthracene.
Development of agrotechnical methods for growing tall blueberries in the open field
Authors: Akimova S V , Samoshenkov E G , Voskoboinikov Yu V , Matskevich M P , Matskevich P P , Bulanov A E 
Published: June 2021

Abstract
When growing tall blueberries in open ground on a substrate consisting of a mixture of high-moor peat, litter of conifers in a ratio of 2: 1, varietal differences of the studied varieties for the developed methods were revealed: planting on a flat surface; on ridges 25-35 cm high and 50-60 cm wide; on a flat surface with pine sawdust mulching (6-8 cm); on ridges 25-35 cm high and 50-60 cm wide with mulching with pine sawdust (6-8 cm); on a flat surface with root ball undercuts. When cultivating the Bluecrop variety, the best results were obtained when planting plants on ridges 25-35 cm high and 50-60 cm wide with additional mulching with pine sawdust, the total growth of the current year on average over two years of research was 758.0 cm against 516.8 cm in control, and the yield was 872.0 g versus 737.0 g. When growing the Elizabeth variety, the best results were obtained when planting plants on a flat surface with additional mulching with pine sawdust, the total growth of the current year on average for two years was 740.5 cm versus 605, 1 cm in the control, and the yield-428 g versus 216 g. Both studied varieties have a responsiveness to the use of mulching.
Plant protection technologies: from advanced to innovative
Authors: Belyakov N V , Nikolina N V 
Published: June 2021

Abstract
The purpose of this study is to analyze the readiness to use innovative technologies for plant protection. The authors are interested in the readiness of specialists in the agricultural sector, scientists, agricoltors to introduce innovative technologies. The authors are conducting this research as part of the project "Social Research of Science and Technology". The authors review the existing plant protection methods and analyze their effectiveness. The authors reflected the agrotechnical method, the biological method, the chemical method, the physical and mechanical method, the integrative method and the innovative method of plant protection. Agricultural technologies are one of the most interesting sectors for investment. Innovations in science and technology, the availability of modern technologies and equipment make it possible to make agricultural production a high-tech business. In conclusion the authors note that for the full implementation and achievement of effective indicators it is necessary to do a lot of legal, economic, technological and organizational work.
The conidia Bipolaris sorokiniana Sacc. Shoem. distribution in the soil of Altai and Kazakhstan arid regions
Authors: Toropova E Yu , Glinushkin A P , Insebaeva M K , Stetsov G Ya 
Published: June 2021

Abstract
The purpose of the study was to assess the number and state of populations of B. sorokiniana conidia in the soil of agrocenoses and virgin areas. Studies were carried out in 2017-2021 in dry steppe regions of the Altai Territory (Russia) and Pavlodar Region (Kazakhstan) by conventional methods. For the experimental data analysis variance and correlation analytical methods were used. A comparative analysis of Bipolaris sorokiniana conidia populations in agrocenoses and virgin soils of arid areas was carried out. A significant phytopathogen conidia population in agrocenosis soils has been established, reaching 10.8 regional economic harmfulness thresholds in Altai and 16.6 thresholds in Kazakhstan. A lower population number in virgin soils was revealed in comparison with agrocenoses’ ones, which is associated with more active resting structures degradation. A clear tendency towards a decrease in the number of conidia with increasing depth was revealed, which manifests itself to different degrees in the regions and tillage systems, but has the same orientation: the upper layer (0-5 cm) is populated several times stronger than the lower (10-15 cm) one. The phytosanitary precursors in both regions (fallow, sunflower, pees, oat with vetch, sweet clover) reduced the conidia number in the soil on average 59%; they significantly increased the conidia proportion with the degradation signs-average by 27.1%. Soil suppressive activity against B. sorokiniana increased significantly (on 19.8-38.3%) after cultivation of phytosanitary predecessors, especially rape.
Parasitic activity of plant pathogens at the underground organs of spring wheat in the West Siberia
Authors: Toropova E Yu , Vorob’ova I G , Kirichenko A A , Trunov R I 
Published: June 2021

Abstract
The purpose of the research was to determine the factors of soil phytopathogens parasitic activity at the underground organs of spring wheat varieties, to clarify the etiology of root rot during the growing season. The studies were carried out in 2020-2021 in the northern forest-steppe of the Ob region (West Siberia) using generally accepted methods. A high parasitic activity of soil phytopathogens was established during the entire growing season of spring wheat: the zonal threshold of harmfulness was exceeded at seedlings up to 2.8 times, at bloom stage to 5 times, and at ripeness stage up to 4 times. The host plants susceptibility to infection with phytopathogens increased during the growing season due to abiotic (drought) and biotic (cereal flies) stresses, which neutralized varietal differences. The main phytopathogens at the underground organs of 20 spring wheat varieties were Bipolaris sorokiniana Sacc. Shom. and Fusarium Link. fungi, the occurrence of which at all underground plant organs (primary roots, secondary roots, stem bases) during the growing season was 100%. The dominance of Fusarium fungi increased during the growing season of plants. The biological diversity of Fusarium fungi was maximal in the bloom phase (up to 7 species on secondary roots of one variety). The species composition of Fusarium fungi was represented by permanent species-F. poae (Peck.) Wollenw. and F. oxysporum Schltdl., additional species-F. sambucinum Fuck., F. graminearum Schwabe and F. equiseti (Corda) Sacc., rare-F. solani Koord., F. sporotrichioides Sherb., F. culmorum Sacc., F. heterosporum Nees., F. acuminatum Ellis & Verh. The succession of Fusarium fungi in the system of plant organs and in the phases of vegetation was revealed, and the parameters of realized ecological niches overlap of Fusarium fungi species were determined.
Remote fiber optic sensor for monitoring the radiological situation
Authors: Dmitrieva D S , Pilipova V M , Diuldin M V 
Published: June 2021

Abstract
The necessity of remote monitoring the radiological situation in the different areas of nuclear power plants, adjacent territories, etc. is sustained. One of the most important conditions for this control is the duration of the system work (for ten or more years) without human intervention (only in a special case). It is noted that a feature of this environmental monitoring for the presence of radiation is the ability to transmit information over long distance in real time without distortion. And constant receipt of information about the value of the exposure dose in the sensor area is also important. In a case of using the system of a large number of sensors, there are no problems information processing, because it is contained in the optical signal. The design of the fiber optic communication line with using the fiber optic sensor is proposed. The measurement limits of the exposure dose of radiation are marked. The results of experimental researches of various fibers for using in these sensors are presented. The method of radiation control with their use is determined.
Investigation of the effect of contamination with chemical elements on changes in the content of clay fraction in sandy-clay rocks
Authors: Cheremisin A V , Gryaznova E M 
Published: June 2021

Abstract
The reasons for soil pollution that causes deviations in the mineral composition are considered. It is noted that changes in the chemical composition of the soil lead to a change in various fractions. This process is considered on the example of clay fractions. The sandy-clay rocks of the Leningrad region in the Russian Federation are considered. Modeling of situations on taking samples of rocks for research has been performed. Comparison of the calculations with the results of express control of the state of rocks by other methods is carried out. The method for determining the content of clay fraction in sandy-clay rocks has been determined.
Studies of the influence of the emission of harmful substances into the atmosphere with using automated systems in a car
Authors: Cheremisin A V , Makeev S S , Logunov S E , Mozhayko A A 
Published: June 2021

Abstract
The article considers the problem of increasing fuel economy and environmental friendliness of passenger cars. It was discovered that the effective ambient temperature, the color of the opaque body elements, the power of the internal combustion engine and the volume of the passenger compartment affect the fuel consumption and the amount of specific emissions of harmful substances with exhaust gases when using the “climate control” system. The results of experimental studies have established the dependence of fuel consumption and the share of reducing emissions of harmful substances with exhaust gases of cars with a “"climate control” system on the coefficient of light reflection. It developed a method of reducing fuel consumption and the amount of specific emissions of harmful substances with exhaust gases of passenger cars with a “climate control” system. The use of this method makes it possible to reduce fuel consumption by 5.5-10.3% and the specific emission of harmful substances by 0.8-2.3%.