104 research outputs found
Simulation of the Melting Process for Complex Nickel-containing Ferroalloys in Steel
In this study, the melting process simulation for the complex nickel-, silicon-containing ferroalloys in a steel melt was performed. For the study, complex ferroalloys samples (βΌ 10% Ni, 5β56% Si) were selected, by composition corresponding to the alloys, which can be smelted from poor Russian oxidized nickel ores. It is shown that all the alloys under consideration belong to the group of low-melting ferroalloys, in which the liquidus temperature (
Turnover of Galactans and Other Cell Wall Polysaccharides during Development of Flax Plants
Parental alexithymia as a risk factor for teens alcohol use
The purpose of the randomized, cross-sectional and correlational study was to investigate the presence, strength and nature of the relationship of parental alexithymia with alcohol use by their children. The study used the sociological and psycho-diagnostic methods. The results of correlation studies have shown strong and highly significant positive relationships of teens alcohol use both with parental alexithymia and with the alexithymic construct factorial components. Parental alexithymia, as well as sensual, communicative and cognitive alexithymic construct components are risk factors of teens alcohol use.Π¦Π΅Π»ΡΡ ΡΠ°Π½Π΄ΠΎΠΌΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ, ΠΊΡΠΎΡΡ-ΡΠ΅ΠΊΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΈ ΠΊΠΎΡΡΠ΅Π»ΡΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΠ²Π»ΡΠ»ΠΎΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ Π½Π°Π»ΠΈΡΠΈΡ, ΡΠΈΠ»Ρ ΠΈ, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠ° ΡΠ²ΡΠ·ΠΈ Π°Π»Π΅ΠΊΡΠΈΡΠΈΠΌΠΈΠΈ ΡΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ Ρ ΡΠΏΠΎΡΡΠ΅Π±Π»Π΅Π½ΠΈΠ΅ΠΌ Π°Π»ΠΊΠΎΠ³ΠΎΠ»Ρ ΠΈΡ
Π΄Π΅ΡΡΠΌΠΈ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΡΠΎΡΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΠΏΡΠΈΡ
ΠΎΠ΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ². Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΊΠΎΡΡΠ΅Π»ΡΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π° ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ ΡΠΈΠ»ΡΠ½ΡΠ΅ ΠΈ Π²ΡΡΠΎΠΊΠΎ Π·Π½Π°ΡΠΈΠΌΡΠ΅ ΠΏΠΎΠ·ΠΈΡΠΈΠ²Π½ΡΠ΅ ΡΠ²ΡΠ·ΠΈ ΡΠΏΠΎΡΡΠ΅Π±Π»Π΅Π½ΠΈΡ Π°Π»ΠΊΠΎΠ³ΠΎΠ»Ρ ΠΏΠΎΠ΄ΡΠΎΡΡΠΊΠ°ΠΌΠΈ Ρ Π°Π»Π΅ΠΊΡΠΈΡΠΈΠΌΠΈΠ΅ΠΉ ΡΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ, Π° ΡΠ°ΠΊΠΆΠ΅ Ρ ΡΠ°ΠΊΡΠΎΡΠ½ΡΠΌΠΈ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠΈΠΌΠΈ Π°Π»Π΅ΠΊΡΠΈΡΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠ°. ΠΠ»Π΅ΠΊΡΠΈΡΠΈΠΌΠΈΡ ΡΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ, Π° ΡΠ°ΠΊΠΆΠ΅ ΡΡΠ²ΡΡΠ²Π΅Π½Π½ΡΠΉ, ΠΊΠΎΠΌΠΌΡΠ½ΠΈΠΊΠ°ΡΠΈΠ²Π½ΡΠΉ ΠΈ ΠΊΠΎΠ³Π½ΠΈΡΠΈΠ²Π½ΡΠΉ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΡ Π°Π»Π΅ΠΊΡΠΈΡΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠ° ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»ΡΡΡ ΡΠΎΠ±ΠΎΠΉ Π·Π½Π°ΡΠΈΠΌΡΠ΅ ΡΠ°ΠΊΡΠΎΡΡ ΡΠΈΡΠΊΠ° ΡΠ°Π½Π½Π΅Π³ΠΎ ΡΠΏΠΎΡΡΠ΅Π±Π»Π΅Π½ΠΈΡ Π°Π»ΠΊΠΎΠ³ΠΎΠ»Ρ Π΄Π΅ΡΡΠΌΠΈ
Synthesis and Turnover of Cell-Wall Polysaccharides and Starch in Photosynthetic Soybean Suspension Cultures
Mathematical modelling of the process of melting alloys of the Si-Cr-Ni-Fe system in the iron-carbon melt
The process of melting of the Si-Cr-Ni-Fe ferroalloys in the iron-carbon melt under static conditions was studied using the method of mathematical modelling. It was found that the melting process takes place in three stages. The effect of silicon concentration and the initial size of a piece of alloy on the duration of each stage of alloy melting is revealed. It was shown that an increase in the silicon content from 6 to 40 % in the complex ferroalloy of the 50 mm fraction containing βΌ 27 % Cr and βΌ 12 % Ni leads to a decrease in the total melting time of the alloys from 67 to 30 seconds at the iron-carbon melt temperature of 1600 Β°C. Β© Published under licence by IOP Publishing Ltd
Thermodynamic modeling of zinc recovery from ferrous metallurgy sludge
Ferrous metallurgy enterprises continuously fill dumps with steelmaking and blast furnace sludge with high zinc content. Sludge occupying significant territories of enterprises is not involved in production and harms the environment. Since zinc leads to the formation of deposits in the blast furnace, manufacturers cannot involve this sludge in sinter processing. In addition, working with sludge can lead to problems such as decrease in iron content in the sinter, decrease in productivity of sintering machines, and increase in fluctuations in the sinter chemical composition. At the same time, zinc-containing sludge can become a valuable secondary product. Zinc remains a scarce metal, which encourages the development of technologies for processing zinc-containing materials. Extraction of zinc from sludge is difficult because it is not in oxide, but in sulfate or sulfide forms. In this paper, the possibilities of zinc extraction from sludge using the FactSage software package are evaluated. The authors present results of thermodynamic calculations of the possibility of zinc extraction from four types of sludge from two Russian ferrous metallurgical plants - EVRAZ NTMK and MECHEL. The data of chemical and phase analyses of this sludge are considered, as well as simulated graphs of zinc extraction dependencies from them. The graphs were built on basis of the received data from FactSage package. Addition of the reducing agent to the sludge varied, as well as temperature of the process. In addition, the possibility of abandoning carbon as a reducing agent was evaluated. To save the reducing agent, an optimal mixture of the company's sludge was selected, in which coke consumption can be minimized. Β© 2022 National University of Science and Technology MISIS. All rights reserved
ΠΠ½Π΄ΠΎΡΠΊΠΎΠΏΠΈΡΠ΅ΡΠΊΠ°Ρ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΠ° ΠΈ Π»Π΅ΡΠ΅Π½ΠΈΠ΅ Π±ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ Ρ ΡΠΈΠ½Ρ ΡΠΎΠ½Π½ΡΠΌΠΈ Π½Π΅ΠΉΡΠΎΡΠ½Π΄ΠΎΠΊΡΠΈΠ½Π½ΡΠΌΠΈ ΠΎΠΏΡΡ ΠΎΠ»ΡΠΌΠΈ ΠΏΡΡΠΌΠΎΠΉ ΠΊΠΈΡΠΊΠΈ
In this article, we describe the procedure of comprehensive endoscopic diagnostics and treatment of a patient with synchronous rectal neuroendocrine tumors. The patient underwent screening colonoscopy at the age of 44; a year before, he had an immunochromatographic fecal occult blood test, which was negative. At the first stage, we performed narrow band imaging with optical magnification, chromoscopy using indigo carmine dye, and endosonography with a 12 MHz transducer. Then the patient underwent radical endoscopic mucosal resection with submucosal dissection. Immunohistochemical examination of surgical specimens demonstrated that both tumors were well differentiated (G1 ). The patient was followed up during a year and had no signs of recurrence.Π ΡΡΠ°ΡΡΠ΅ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΡΡΡ ΠΏΡΠΈΠΌΠ΅Ρ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΠΎΠΉ ΡΠ½Π΄ΠΎΡΠΊΠΎΠΏΠΈΡΠ΅ΡΠΊΠΎΠΉ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΠΈ ΠΈ Π»Π΅ΡΠ΅Π½ΠΈΡ Π±ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ Ρ ΡΠΈΠ½Ρ
ΡΠΎΠ½Π½ΡΠΌΠΈ Π½Π΅ΠΉΡΠΎΡΠ½Π΄ΠΎΠΊΡΠΈΠ½Π½ΡΠΌΠΈ ΠΎΠΏΡΡ
ΠΎΠ»ΡΠΌΠΈ ΠΏΡΡΠΌΠΎΠΉ ΠΊΠΈΡΠΊΠΈ. ΠΠ°ΡΠΈΠ΅Π½Ρ ΡΠ΅ΡΠΈΠ» ΠΏΡΠΎΠΉΡΠΈ ΡΠΊΡΠΈΠ½ΠΈΠ½Π³ΠΎΠ²ΡΡ ΠΊΠΎΠ»ΠΎΠ½ΠΎΡΠΊΠΎΠΏΠΈΡ Π² Π²ΠΎΠ·ΡΠ°ΡΡΠ΅ 44 Π»Π΅Ρ; Π·Π° Π³ΠΎΠ΄ Π΄ΠΎ ΡΠ½Π΄ΠΎΡΠΊΠΎΠΏΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΠ΄Π°Π²Π°Π» ΠΊΠ°Π» Π½Π° ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΡΠΊΡΡΡΠΎΠΉ ΠΊΡΠΎΠ²ΠΈ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΠΈΠΌΠΌΡΠ½ΠΎΡ
ΡΠΎΠΌΠ°ΡΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π°, Π³Π΅ΠΌΠΎΠ³Π»ΠΎΠ±ΠΈΠ½Π° Π² ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π΅ Π½Π΅ Π±ΡΠ»ΠΎ ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½ΠΎ. ΠΠ° 1-ΠΌ ΡΡΠ°ΠΏΠ΅ Π²ΡΠΏΠΎΠ»Π½Π΅Π½Ρ ΡΠ·ΠΊΠΎΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½Π°Ρ ΡΠ½Π΄ΠΎΡΠΊΠΎΠΏΠΈΡ Ρ ΠΎΠΏΡΠΈΡΠ΅ΡΠΊΠΈΠΌ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠ΅ΠΌ, Ρ
ΡΠΎΠΌΠΎΡΠΊΠΎΠΏΠΈΡ Ρ ΡΠ°ΡΡΠ²ΠΎΡΠΎΠΌ ΠΈΠ½Π΄ΠΈΠ³ΠΎΠΊΠ°ΡΠΌΠΈΠ½Π° ΠΈ ΡΠ½Π΄ΠΎΡΠΎΠ½ΠΎΠ³ΡΠ°ΡΠΈΡ ΡΠ»ΡΡΡΠ°Π·Π²ΡΠΊΠΎΠ²ΡΠΌ Π΄Π°ΡΡΠΈΠΊΠΎΠΌ ΡΠ°ΡΡΠΎΡΠΎΠΉ 12 ΠΠΡ. ΠΠ° 2-ΠΌ ΡΡΠ°ΠΏΠ΅ ΠΎΡΡΡΠ΅ΡΡΠ²Π»Π΅Π½ΠΎ ΡΠ°Π΄ΠΈΠΊΠ°Π»ΡΠ½ΠΎΠ΅ Ρ
ΠΈΡΡΡΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ΅ Π»Π΅ΡΠ΅Π½ΠΈΠ΅ Π² ΠΎΠ±ΡΠ΅ΠΌΠ΅ ΡΠ½Π΄ΠΎΡΠΊΠΎΠΏΠΈΡΠ΅ΡΠΊΠΎΠΉΒ ΡΠ΅Π·Π΅ΠΊΡΠΈΠΈ ΡΠ»ΠΈΠ·ΠΈΡΡΠΎΠΉ ΠΎΠ±ΠΎΠ»ΠΎΡΠΊΠΈ Ρ Π΄ΠΈΡΡΠ΅ΠΊΡΠΈΠ΅ΠΉ Π² ΠΏΠΎΠ΄ΡΠ»ΠΈΠ·ΠΈΡΡΠΎΠΌ ΡΠ»ΠΎΠ΅. ΠΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ°ΠΌ ΠΈΠΌΠΌΡΠ½ΠΎΠ³ΠΈΡΡΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΎΠ±Π΅ ΠΎΠΏΡΡ
ΠΎΠ»ΠΈ Π±ΡΠ»ΠΈ Π²ΡΡΠΎΠΊΠΎΠ΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠΌΠΈ (G1 ). ΠΠ°ΡΠΈΠ΅Π½Ρ Π½Π°Π±Π»ΡΠ΄Π°Π΅ΡΡΡ Π² ΡΠ΅ΡΠ΅Π½ΠΈΠ΅ Π³ΠΎΠ΄Π° Π±Π΅Π· ΠΏΡΠΈΠ·Π½Π°ΠΊΠΎΠ² ΡΠ΅ΡΠΈΠ΄ΠΈΠ²Π°
Experimental studies of energy characteristics of mixer with deformable camera
Currently the development of new machine designs and methods of their engineering calculation is one of the most priority areas of construction industry. It allows one to carry out research at the stage of theoretical calculations in order to predict the expected result. One of the promising constructive solutions for economic profitability increase of mixing equipment is the use of deformable working chamber
Stable, synthetic analogs of diadenosine tetraphosphate inhibit rat and human P2X3 receptors and inflammatory pain
Β© 2016, Β© The Author(s) 2016.Background: A growing body of evidence suggests that ATP-gated P2X3 receptors (P2X3Rs) are implicated in chronic pain. We address the possibility that stable, synthetic analogs of diadenosine tetraphosphate (Ap4A) might induce antinociceptive effects by inhibiting P2X3Rs in peripheral sensory neurons. Results: The effects of two stable, synthetic Ap4A analogs (AppNHppA and AppCH2ppA) are studied firstly inΒ vitro on HEK293 cells expressing recombinant rat P2XRs (P2X2Rs, P2X3Rs, P2X4Rs, and P2X7Rs) and then using native rat brain cells (cultured trigeminal, nodose, or dorsal root ganglion neurons). Thereafter, the action of these stable, synthetic Ap4A analogs on inflammatory pain and thermal hyperalgesia is studied through the measurement of antinociceptive effects in formalin and Hargreaves plantar tests in rats inΒ vivo. InΒ vitro inhibition of rat P2X3Rs (not P2X2Rs, P2X4Rs nor P2X7Rs) is shown to take place mediated by high-affinity desensitization (at low concentrations; IC50 values 100β250 nM) giving way to only weak partial agonism at much higher concentrations (EC50 values β₯ 10 Β΅M). Similar inhibitory activity is observed with human recombinant P2X3Rs. The inhibitory effects of AppNHppA on nodose, dorsal root, and trigeminal neuron whole cell currents suggest that stable, synthetic Ap4A analogs inhibit homomeric P2X3Rs in preference to heteromeric P2X2/3Rs. Both Ap4A analogs mediate clear inhibition of pain responses in both inΒ vivo inflammation models. Conclusions: Stable, synthetic Ap4A analogs (AppNHppA and AppCH2ppA) being weak partial agonist provoke potent high-affinity desensitization-mediated inhibition of homomeric P2X3Rs at low concentrations. Therefore, both analogs demonstrate clear potential as potent analgesic agents for use in the management of chronic pain associated with heightened P2X3R activation
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