288 research outputs found
Analysis of the Telecommunication Companies' Capital and its Structure Optimization
The search for optimal capital structure of a company is an important task of the strategic financial management.
The paper given is a natural continuation of a series of author's publications on the study of problems connected with building an optimal capital structure of a company (Ageev and Filonova, 2017), (Filonova ES, 2017). The practical part of the research conducted deals with the leaders of the Russian telecommunication market Β«RostelecomΒ», Β«MTSΒ», Β«MegaFonΒ», Β«Vimpel-CommunicationsΒ» and there were some attempts to build an optimal capital structure in the strategic group of competitors, based on the materials of accounting (financial) reports of these companies as at 2014 and 2015.
The present paper contains the analysis of the actual capital structure of the companies mentioned above based on studying their balance sheets, made as at the end of 2016, and gives the results of the search for optimal capital structure based on the data in the new accounting period
Short review on recent studies and prospects of application of rare-earth-doped La2NiO4+Ξ΄ as air electrodes for solid-oxide electrochemical cells
Solid solutions based on the rare earth substituted lanthanum nickelate La2NiO4+Ξ΄ are considered as promising air electrode materials for electrochemical applications. The present focus review summarizes recently published papers dealing with synthesis methods and investigations of the crystal structure, physicochemical properties, oxygen diffusion and electrochemical activity of La2βxLnxNiO4+Ξ΄ (LnΒ =Β Pr, Nd, Sm, Eu, Gd) electrode materials. It highlights the application advantages and drawbacks of the Ln-substituted La2NiO4+Ξ΄ for solid oxide fuel and electrolysis cells and compared to the non-substituted La2NiO4+Ξ΄.https://doi.org/10.15826/elmattech.2023.2.02
Recent Progress in the Design, Characterisation and Application of LaAlO3-and LaGaO3-Based Solid Oxide Fuel Cell Electrolytes
Solid oxide fuel cells (SOFCs) are efficient electrochemical devices that allow for the direct conversion of fuels (their chemical energy) into electricity. Although conventional SOFCs based on YSZ electrolytes are widely used from laboratory to commercial scales, the development of alternative ion-conducting electrolytes is of great importance for improving SOFC performance at reduced operation temperatures. The review summarizes the basic information on two representative families of oxygen-conducting electrolytes: doped lanthanum aluminates (LaAlO3) and lanthanum gallates (LaGaO3). Their preparation features, chemical stability, thermal behaviour and transport properties are thoroughly analyzed in terms of their connection with the target functional parameters of related SOFCs. The data presented here will serve as a starting point for further studies of La-based perovskites, including in the fields of solid state ionics, electrochemistry and applied energy. Β© 2022 by the authors. Licensee MDPI, Basel, Switzerland.Ministry of Education and Science of the Russian Federation,Β Minobrnauka: 075-03-2021-051/5Funding: This research was funded by to the Ministry of Education and Science of the Russian Federation, contract no. 075-03-2021-051/5
Some aspects of the pathogenesis of abnormal reproductive function development in adolescent girls (literature review)
The coincidence of pathogenesis of infectious and non-infectious diseases is discussed in the review. The trigger mechanism of the disease is the endogenous intoxication syndrome which develops on the basis of damaged regulation of the body functional systems interaction. Reproductive system is presented as one of the body functional system. Damage of the defense function due to broken body barriers (immune system, liver detoxication system and excrete organs system) leads to the rise of endotoxins level and LPO- AOS abnormal balance. Future disturbances in nervous and endocrine systems that lead to different pathology of adolescents develop later.Π ΠΎΠ±Π·ΠΎΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ Π²Π·Π³Π»ΡΠ΄ Π½Π° Π΅Π΄ΠΈΠ½ΡΡΠ²ΠΎ ΠΏΠ°ΡΠΎΠ³Π΅Π½Π΅Π·Π° ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠΎΠ½Π½ΡΡ
ΠΈ Π½Π΅ΠΈΠ½ΡΠ΅ΠΊΡΠΈΠΎΠ½Π½ΡΡ
Π·Π°Π±ΠΎΠ»Π΅Π²Π°Π½ΠΈΠΉ. ΠΡΡΠΊΠΎΠ²ΡΠΌ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠΎΠΌ Π±ΠΎΠ»Π΅Π·Π½ΠΈ ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΠΈΠ½Π΄ΡΠΎΠΌ ΡΠ½Π΄ΠΎΠ³Π΅Π½Π½ΠΎΠΉ ΠΈΠ½ΡΠΎΠΊΡΠΈΠΊΠ°ΡΠΈΠΈ, ΠΊΠΎΡΠΎΡΡΠΉ Π²ΠΎΠ·Π½ΠΈΠΊΠ°Π΅Ρ Π½Π° ΡΠΎΠ½Π΅ Π΄ΠΈΠ·ΡΠ΅Π³ΡΠ»ΡΡΠΈΠΈ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΡ ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ
ΡΠΈΡΡΠ΅ΠΌ ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌΠ°. Π Π΅ΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠ²Π½Π°Ρ ΡΠΈΡΡΠ΅ΠΌΠ° ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΠΊΠ°ΠΊ ΠΎΠ΄Π½Π° ΠΈΠ· ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ
ΡΠΈΡΡΠ΅ΠΌ ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌΠ°, Π² Π½Π°ΡΡΡΠ΅Π½ΠΈΠΈ ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΡ ΠΊΠΎΡΠΎΡΠΎΠΉ ΠΈΠΌΠ΅ΡΡ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ Π·Π°ΡΠΈΡΠ½ΡΡ
ΡΡΠ½ΠΊΡΠΈΠΉ ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌΠ° Π½Π° ΡΠΎΠ½Π΅ ΠΏΠΎΠ²ΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΡ ΠΎΡΠ³Π°Π½ΠΎΠ² Π±Π°ΡΡΠ΅ΡΠΎΠ² (ΠΈΠΌΠΌΡΠ½Π½Π°Ρ ΡΠΈΡΡΠ΅ΠΌΠ°, Π΄Π΅ΡΠΎΠΊΡΠΈΠΊΠ°ΡΠΈΠΎΠ½Π½Π°Ρ ΡΠΈΡΡΠ΅ΠΌΠ° ΠΏΠ΅ΡΠ΅Π½ΠΈ, ΡΠΈΡΡΠ΅ΠΌΠ° ΡΠΊΡΠΊΡΠ΅ΡΠΎΡΠ½ΡΡ
ΠΎΡΠ³Π°Π½ΠΎΠ²), ΠΏΡΠΈΠ²ΠΎΠ΄ΡΡΠΈΡ
ΠΊ Π½Π°ΠΊΠΎΠΏΠ»Π΅Π½ΠΈΡ ΡΠ½Π΄ΠΎΡΠΎΠΊΡΠΈΠ½ΠΎΠ² ΠΈ Π΄ΠΈΡΠ±Π°Π»Π°Π½ΡΡ ΠΠΠ-ΠΠΠ‘. Π ΠΏΠΎΡΠ»Π΅Π΄ΡΡΠ²ΠΈΠΈ Π½Π°ΡΡΡΠΏΠ°ΡΡ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ Π² Π½Π΅ΡΠ²Π½ΠΎΠΉ ΠΈ ΡΠ½Π΄ΠΎΠΊΡΠΈΠ½Π½ΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΠ°Ρ
, ΠΏΡΠΎΡΠ²Π»ΡΡΡΠΈΠ΅ΡΡ Π² ΡΠ°Π·Π»ΠΈΡΠ½ΠΎΠΉ ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΏΠΎΠ΄ΡΠΎΡΡΠΊΠΎΠ²ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠΈΠΎΠ΄Π°
Evaluation of hemostasis system in adoltscent girls with altered development of reproductive function
Hemostasis of 270 adolescent girls with altered development of reproductive function was examined. Total cohort research has been performed. The revealed changes in hemostasis system of adolescent girls with altered reproductive development reflect adequate adaptation of internal and external activation pathways of blood coagulation. The significant LA increase in the main group is the result of autoantibodies hyperproduction and reflects the pathogenesis of altered development of reproductive function.Π‘ ΡΠ΅Π»ΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ Π½Π΅ΠΊΠΎΡΠΎΡΡΡ
Π·Π²Π΅Π½ΡΠ΅Π² Π³Π΅ΠΌΠΎΡΡΠ°Π·Π° ΡΠ΄Π΅Π²ΠΎΡΠ΅ΠΊ-ΠΏΠΎΠ΄ΡΠΎΡΡΠΊΠΎΠ² Ρ Π½Π°ΡΡΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΡ ΡΠ΅ΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠ²Π½ΠΎΠΉ ΡΡΠ½ΠΊΡΠΈΠΈ ΠΎΠ±ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ 270 Π΄Π΅Π²ΠΎΡΠ΅ΠΊ-ΠΏΠΎΠ΄ΡΠΎΡΡΠΊΠΎΠ² ΠΏΡΠ±Π΅ΡΡΠ°ΡΠ½ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠΈΠΎΠ΄Π°. ΠΠ°Π±ΠΎΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΠΈΠ»ΡΡ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠΏΠ»ΠΎΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠ³ΠΎΡΡΠ½ΠΎΠ³ΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ. ΠΡΡΠ²Π»Π΅Π½Π½ΡΠ΅ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π² ΡΠΈΡΡΠ΅ΠΌΠ΅ Π³Π΅ΠΌΠΎΡΡΠ°Π·Π° Ρ Π΄Π΅Π²ΠΎΡΠ΅ΠΊ-ΠΏΠΎΠ΄ΡΠΎΡΡΠΊΠΎΠ² Ρ Π½Π°ΡΡΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΡ ΡΠ΅ΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠ²Π½ΠΎΠΉ ΡΡΠ½ΠΊΡΠΈΠΈ ΠΊΠΎΠ½ΡΡΠ°ΡΠΈΡΡΡΡ ΡΠΎΡΡΠΎΡΡΠ΅Π»ΡΠ½ΠΎΡΡΡ Π°Π΄Π°ΠΏΡΠ°ΡΠΈΠΈ Π²Π½Π΅ΡΠ½Π΅Π³ΠΎ ΠΈ Π²Π½ΡΡΡΠ΅Π½Π½Π΅Π³ΠΎ ΠΏΡΡΠΈ Π°ΠΊΡΠΈΠ²Π°ΡΠΈΠΈ ΡΠΈΡΡΠ΅ΠΌΡ ΡΠ²Π΅ΡΡΡΠ²Π°Π½ΠΈΡ ΠΊΡΠΎΠ²ΠΈ. ΠΠΎΡΡΠΎΠ²Π΅ΡΠ½ΠΎΠ΅ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ ΠΠ Π² ΠΎΡΠ½ΠΎΠ²Π½ΠΎΠΉ Π³ΡΡΠΏΠΏΠ΅ ΡΠΎΠΏΡΡΠΆΠ΅Π½ΠΎ Ρ Π³ΠΈΠΏΠ΅ΡΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠ΅ΠΉ Π°ΡΡΠΎΠ°Π½ΡΠΈΡΠ΅Π» ΠΈ ΠΎΡΡΠ°ΠΆΠ°Π΅Ρ ΠΊΠ°ΡΠΊΠ°Π΄ ΠΏΠ°ΡΠΎΡΠΈΠ·ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅Π°ΠΊΡΠΈΠΉ ΠΏΠ°ΡΠΎΠ³Π΅Π½Π΅Π·Π° Π½Π°ΡΡΡΠ΅Π½ΠΈΠΉ ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΡ ΡΠ΅ΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠ²Π½ΠΎΠΉ ΡΡΠ½ΠΊΡΠΈΠΈ
Short review on recent studies and prospects of application of rare-earth-doped La2NiO4+Ξ΄ as air electrodes for solid-oxide electrochemical cells
Received: 16 October 2023. Accepted: 2 November 2023. Published online: 14 November 2023.Solid solutions based on the rare earth substituted lanthanum nickelate La2NiO4+Ξ΄ are considered as promising air electrode materials for electrochemical applications. The present focus review summarizes recently published papers dealing with synthesis methods and investigations of the crystal structure, physicochemical properties, oxygen diffusion and electrochemical activity of La2βxLnxNiO4+Ξ΄ (Ln = Pr, Nd, Sm, Eu, Gd) electrode materials. It highlights the application advantages and drawbacks of the Ln-substituted La2NiO4+Ξ΄ for solid oxide fuel and electrolysis cells and compared to the non-substituted La2NiO4+Ξ΄.The authors are grateful to Mr. Roman Ivanov, engineer of the Department of Technical Physics, Physico-technological Institute UrFU, for help with the graphical visualization of data
Undoped sr2mmoo6 double perovskite molybdates (M = ni, mg, fe) as promising anode materials for solid oxide fuel cells
The chemical design of new functional materials for solid oxide fuel cells (SOFCs) is of great interest as a means for overcoming the disadvantages of traditional materials. Redox stability, carbon deposition and sulfur poisoning of the anodes are positioned as the main processes that result in the degradation of SOFC performance. In this regard, double perovskite molybdates are possible alternatives to conventional Ni-based cermets. The present review provides the fundamental properties of four members: Sr2NiMoO6-Ξ΄, Sr2MgMoO6-Ξ΄, Sr2FeMoO6-Ξ΄ and Sr2Fe1.5Mo0.5O6-Ξ΄. These properties vary greatly depending on the type and concentration of the 3d-element occupying the B-position of A2BBβO6. The main emphasis is devoted to: (i) the synthesis features of undoped double molybdates, (ii) their electrical conductivity and thermal behaviors in both oxidizing and reducing atmospheres, as well as (iii) their chemical compatibility with respect to other functional SOFC materials and components of gas atmospheres. The information provided can serve as the basis for the design of efficient fuel electrodes prepared from complex oxides with layered structures. Β© 2021 by the authors. Licensee MDPI, Basel, Switzerland.The work was funded by a grant from the Ministry of Science and Higher Education of the Russian Federation (Agreement No. 075-15-2019-1924)
ΠΡΠ΅Π΄ΡΠΏΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΠ΅ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΈΡ ΠΏΡΠ°Π²ΠΎΠ½Π°ΡΡΡΠ΅Π½ΠΈΠΉ Π² Π±ΡΡ Π³Π°Π»ΡΠ΅ΡΡΠΊΠΎΠΌ ΡΡΠ΅ΡΠ΅ ΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΠΈ
Π Π΄Π°Π½Π½ΠΎΠΉ ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡΡΡ ΠΎΠ±ΡΠΈΠ΅ ΠΏΡΠΈΠ½ΡΠΈΠΏΡ ΠΏΡΠ΅Π΄ΡΠΏΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΡ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠ΅ΡΡΡΠΏΠ»Π΅Π½ΠΈΠΉ. Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ ΠΎΡΠ½ΠΎΠ²Π½ΡΠ΅ ΠΌΠ΅ΡΡ ΠΏΡΠΎΡΠΈΠ»Π°ΠΊΡΠΈΠΊΠΈ ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠ°Π²ΠΎΠ½Π°ΡΡΡΠ΅Π½ΠΈΠΉ Π² Π±ΡΡ
Π³Π°Π»ΡΠ΅ΡΡΠΊΠΎΠΌ ΡΡΠ΅ΡΠ΅
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