161 results on '"V. Kiryukhin"'
Search Results
2. Magmatic system of the Klyuchevskoy volcano according to seismic data and their geomechanical interpretation
- Author
-
Aleksei V. Kiryukhin, Olga V. Bergal-Kuvikas, Mikhail V. Lemzikov, and Nikita B. Zhuravlev
- Subjects
volcano ,klyuchevskoy ,magma ,dyke ,frac-digger ,Mining engineering. Metallurgy ,TN1-997 - Abstract
3D analysis of the magma transport and accumulation mechanism in the structure and basement of the Klyuchevskoy volcano preceding 11 eruptions in 2003-2021 has been performed. Using the Frac-Digger method and seismological data from the Kamchatka Branch Federal Research Center United Geophysical Survey Russia Academy of Sciences it has been shown that magma transport from the deep crustal magma chamber (−30 km) is carried out in the vertical fracturing (dykes) mode to the peripheral shallow magma chamber (+1 km). The feeding dykes orientation corresponds to geomechanical conditions of radial or N-NNE extension. This is followed by inclined dykes and sills of various orientations from the peripheral magmatic chamber. Magma accumulation in the peripheral magmatic chamber in the form of sills (in the horizontal fracturing mode at elevations of +0,3 to +2,3 km) contributes to the efficiency of magma degassing and heat exchange with meteoric waters, and to the formation of a high-pressure vapour-gas reservoir with subsequent venting of the volcano channel and its eruption. Three-dimensional analysis of the distribution of flank eruptions of the Klyuchevskoy volcano in 1932-2021 (16 cinder cones) shows their association with two main low-inclined structural surfaces. Changes in the drainage level of the magmatic system are reflected in the volumes and geochemical history of the 1932-2021 flank eruption products.
- Published
- 2023
3. The impact of secondary mineral formation on Na-K-geothermometer readings: a case study for the Valley of Geysers hydrothermal system (Kronotsky State Nature Biosphere Reserve, Kamchatka)
- Author
-
Anastasia V. Sergeeva, Alexey V. Kiryukhin, Olga O. Usacheva, Tatiana V. Rychkova, Elena V. Kartasheva, Mariya A. Nazarova, and Anna A. Kuzmina
- Subjects
toughreact-simulation ,valley of geysers ,geothermometers ,zeolites ,montmorillonite ,geothermal reservoir ,volcanic glass ,Mining engineering. Metallurgy ,TN1-997 - Abstract
The temperature in the Valley of Geysers (Kamchatka) geothermal reservoir calculated using the feldspar Na-K-geothermometer has been steadily increasing over the past 10 years on average from 165 to 235 °C, which is close to the temperature values of a hydrothermal explosion of the steam and water mixture. For the analysis of chemical geothermometers, TOUGHREACT-simulation was used, with the help of which the previously known Na-K feldspar geothermometer was reproduced on a single-element model and new formulas were obtained for three Na-K geothermometers: zeolite, smectite, and based on volcanic glass. Data of chemical analysis for the period 1968-2018, in which the chloride ion is considered as an inert tracer of geofiltration processes, indicates that after 2007 a significant inflow of infiltration water (its mass fraction is estimated from 5 to 15 %) into the Geyser reservoir. It is assumed that the Na-K increased values of the feldspar geothermometer are not the result of the temperature increase in the Geyser reservoir, but the effect of smectite water dilution.
- Published
- 2023
4. Treatment of corneal ulcers by local ultraviolet crosslinking (an experimental study)
- Author
-
V. V. Neroev, E. V. Yani, E. N. Iomdina, I. P. Khoroshilova-Maslova, V. A. Golikova, and A. V. Kiryukhin
- Subjects
corneal ulcer ,crosslinking ,antibiotic therapy ,healing ,light microscopy ,scar tissue ,Ophthalmology ,RE1-994 - Abstract
Purpose: to compare the effectiveness of corneal ulcer treatment by antibiotic therapy and local ultraviolet crosslinking in a clinical and morphological experimental study using the new Crosscor device. Material and methods. The study was performed on 15 rabbits (30 eyes) with a model of corneal ulceration caused by Staphylococcus aureus. Rabbits were divided into 3 groups of 5 specimens each (10 eyes). Group 1 received local ultraviolet A range (UVA) crosslinking (CL) of the cornea using the Crosscor device (3 procedures lasting 5, 6 and 6 minutes each were given with intervals of three days). In group 2, CL was combined with antibacterial treatment (AB): instillations of tobramycin 0.3 % and ofloxacin ointment 3 mg / g were given 4 times a day for 14 days. In the control group, only AB treatment was given. The dynamics of inflammation, the intensity of turbidity and the size of the corneal ulcer were evaluated using biomicroscopy, fluorescein test, photoregistration of the anterior part of the eye, and according to a point system. Morphological changes in the cornea were determined using light microscopy (Leica with a DFC 420C digital camera). Results. In group 1 (CL) complete healing of the ulcer defect was noted on the 9th day of observation; in group 2 (CL + AB), the diameter of the corneal ulcer was reduced to 1.6 ± 0.5 mm, in the control group (AB) it was reduced to 1.9 ± 0.3 mm (p < 0.05). The total score of inflammatory changes on day 9 in the 1st group was 0.8 ± 1.3, in the 2nd group, 3.6 ± 0.8, and in the control group, 3.7 ± 0.4 (p < 0.05). On day 9, in all cases of the 1st group, a slight clouding of the cornea was formed (0–-1 point); in the 2nd group and in the control group in 90 % of cases a rough clouding of the cornea with vascularization was formed (3 points). Morphological examination of the eyes showed that only in the 1st group avascular scars with an ordered arrangement of fibrous tissue fibrils were formed. Conclusion. The data obtained indicate a significantly higher efficiency of corneal ulcer treatment by local UVA crosslinking using Crosscor as compared with antibiotic therapy.
- Published
- 2020
- Full Text
- View/download PDF
5. Design and Use of Microcarriers for the Delivery of Nutraceuticals
- Author
-
Maxim V. Kiryukhin, Su Hui Lim, and Cheryl Yingxue Chia
- Published
- 2023
6. Improving the Efficiency of Acoustic Insulation for Power Equipment
- Author
-
A. V. Kiryukhin, S. P. Bobrov, V. A. Taran, and A. P. Zheleznov
- Subjects
Nuclear Energy and Engineering ,Energy Engineering and Power Technology - Published
- 2022
7. Russian Classics in Translations into Latin as Part of 'Fundamentals of the Latin Language' Course
- Author
-
D. V. Kiryukhin
- Subjects
latin language ,foreign language teaching at university ,literary translation ,a. n. kuryashkin ,yu. a. stasyuk ,Slavic languages. Baltic languages. Albanian languages ,PG1-9665 - Abstract
The article is devoted to translations of Russian classics into Latin, made by A. N. Kuryashkin and Yu. A. Stasyuk, and how they can be used in the classes for the Latin language in higher educational institutions of Russia. The author notes that the Latin language does not lose its importance today, remaining one of the most important subjects for philologists, historians and philosophers who need to work with the primary sources, as well as for doctors and veterinarians whose professional activity is impossible without the skills of reading, translating and writing clinical and anatomical terms and recipes. Translations of classic poetic works of M. V. Lomonosov, A. S. Pushkin, M. Yu. Lermontov, K. I. Chukovsky, A. L. Barto and other authors, of course, familiar to students from school, as well as the well-known Russian songs can be used by the teacher not only as texts for the training of oral reading and translation, but also as part of the additional and creative tasks. In addition, it is possible to include them in the number of control questions to the test (exam), which should arouse students’ interest, motivation and form skills of independent analysis of the text.
- Published
- 2018
- Full Text
- View/download PDF
8. Decreasing Vibrations and Noise from Power Facilities by Passive and Active Methods
- Author
-
A. V. Kiryukhin, O. O. Mil’man, L. N. Serezhkin, and E. A. Loshkareva
- Subjects
Nuclear Energy and Engineering ,Energy Engineering and Power Technology - Published
- 2022
9. Optical Flowmeter for Measuring the Coolant Flow Rate in the Primary Loop of a Nuclear Reactor
- Author
-
V. V. Davydov, R. V. Davydov, A. V. Kiryukhin, S. E. Logunov, and V. I. Dudkin
- Subjects
Nuclear Energy and Engineering - Published
- 2022
10. Spin-phonon interactions and magnetoelectric coupling in Co$_4$$B_2$O$_9$ ($B$ = Nb, Ta)
- Author
-
K. Park, J. Kim, S. Choi, S. Fan, C. Kim, D. G. Oh, N. Lee, S.-W. Cheong, V. Kiryukhin, Y. J. Choi, D. Vanderbilt, J. H. Lee, and J. L. Musfeldt
- Subjects
Condensed Matter - Other Condensed Matter ,Condensed Matter - Materials Science ,Physics and Astronomy (miscellaneous) ,Materials Science (cond-mat.mtrl-sci) ,FOS: Physical sciences ,Other Condensed Matter (cond-mat.other) - Abstract
In order to explore the consequences of spin-orbit coupling on spin-phonon interactions in a set of chemically-similar mixed metal oxides, we measured the infrared vibrational properties of Co$_4B_2$O$_9$ ($B$ = Nb, Ta) as a function of temperature and compared our findings with lattice dynamics calculations and several different models of spin-phonon coupling. Frequency vs. temperature trends for the Co$^{2+}$ shearing mode near 150 cm$^{-1}$ reveal significant shifts across the magnetic ordering temperature that are especially large in relative terms. Bringing these results together and accounting for noncollinearity, we obtain spin-phonon coupling constants of -3.4 and -4.3 cm$^{-1}$ for Co$_4$Nb$_2$O$_9$ and the Ta analog, respectively. Analysis reveals that these coupling constants derive from interlayer (rather than intralayer) exchange interactions and that the interlayer interactions contain competing antiferromagnetic and ferromagnetic contributions. At the same time, beyond-Heisenberg terms are minimized due to fortuitous symmetry considerations, different than most other 4$d$- and 5$d$-containing oxides. Comparison with other contemporary oxides shows that spin-phonon coupling in this family of materials is among the strongest ever reported, suggesting an origin for magnetoelectric coupling.
- Published
- 2023
11. Modeling of the Thermal-Hydrodynamic and Chemical Regime of Geyser Reservoir (Valley of Geyser, Kamchatka)
- Author
-
Alexey V. Kiryukhin, Anastasiya V. Sergeeva, and Olga O. Usacheva
- Published
- 2023
12. A CO2-Driven Gas Lift Mechanism in Geyser Cycling (Uzon Caldera, Kamchatka)
- Author
-
Alexey V. Kiryukhin and Gennady Karpov
- Subjects
geyser ,Uzon ,CO2 ,TOUGH2 ,modeling ,Geology ,QE1-996.5 - Abstract
Here, we report on a new geyser (named Shaman) formed in the Uzon caldera (Kronotsky Federal Nature Biosphere Reserve, Russia) in autumn 2008 from a cycling hot Na-Cl spring. The geyser is a pool-type CO2-gas lift driven. From 2012 to 2018, the geyser has shown a rather stable interval between eruptions (IBE) from 129 to 144 min with a fountain height up to 4 m, and the geyser conduit has gradually enlarged. In 2019, the Shaman geyser eruption mode significantly changed: cold water inflow from the adjacent stream was re-directed into the geyser conduit and the average IBE decreased to 80 min. We observed two eruptive modes: a cycling hot spring (June 2019) and a cycling geyser (after June 2019). Bottom-hole temperature recording was performed in the geyser conduit to understand its activity. The TOUGH2-EOS2 model was used to reproduce the obtained temperature records and estimate geyser recharge/discharge parameters in both modes. Modeling shows that a larger cold inflow into the conduit causes a switch from cycling geyser to hot cycling spring mode. It was also found that the switch to cycling geyser mode corresponds to a larger mass of CO2 release during the time of the eruption.
- Published
- 2020
- Full Text
- View/download PDF
13. Spatial Active Damping of Vibrations, Vibration Forces, and Pressure Fluctuations Transferred via Expansion Joints in Liquid-Filled Pipelines
- Author
-
A. V. Ptakhin, A. A. Kiryukhin, A. V. Kiryukhin, L. N. Serezhkin, and O. O. Mil’man
- Subjects
Materials science ,Piping ,Frequency band ,Acoustics ,Energy Engineering and Power Technology ,Stiffness ,Expansion joint ,Power (physics) ,Vibration ,Pipeline transport ,Vibration isolation ,Nuclear Energy and Engineering ,medicine ,medicine.symptom - Abstract
An analysis from the results of investigation into spatial active damping of pressure fluctuations, vibrations, and vibration forces transferred from power facilities via expansion joints in their piping is presented. Vibration transfer from power facilities via piping can be several orders of magnitude greater than along the support structures. This fact should be kept in mind in designing vibration isolation of power equipment from the foundation and the environment through pipelines in the power and transport engineering, shipbuilding, and in oil and gas pipelines in pumping stations. To reduce the transfer of vibrations via a pipeline by means of vibration-isolating expansion joints, it is necessary to decrease their structural stiffness and the forces induced by fluctuations of the working fluid pressure in an expansion joint in a wide frequency band using structural or active methods. A review of the available publications has not revealed, except for the studies performed within the scope of this investigation, any analysis of the interaction between the fluid fluctuations and vibration in the expansion joints or information on reducing the transfer of vibrations and pressure fluctuations via expansion joints in liquid-carrying pipelines. The effectiveness of various multichannel spatial active vibration protection systems whose feedback circuit includes regulators in the form of standard band-pass filters has been studied experimentally. The effect that the interaction of active vibration force damping channels has on the damping efficiency, which may be caused by the cross sensitivity of three-component vibration force sensors during damping of the vibration forces, has been revealed. The active spatial vibration damping of a pipeline downstream of the expansion joint has also demonstrated the interaction of active vibration damping channels resulting in a noticeable change in the damping effectiveness. The effectiveness of the investigated options varied from 10 to 32 dB (reducing fluctuations, transfer of vibration, and forces transmission by 3–30 times) both at individual frequencies and in frequency bands in the range between 10 and 500 Hz.
- Published
- 2021
14. Surface-reacted calcium carbonate microparticles as templates for lactoferrin encapsulation
- Author
-
Marita Broadhurst, Yin Win Khin, Mike Weeks, Cheryl Yingxue Chia, Joachim Schoelkopf, Maxim V. Kiryukhin, Olivia A M Wallace, Cathy J. Ridgway, Hooi Hong Lau, Carole Berry, Paul Harris, Daralyn Hurford, Su Hui Lim, and Maria N. Antipina
- Subjects
Absorption (pharmacology) ,Whey protein ,Capsules ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Calcium Carbonate ,Biomaterials ,Surface area ,chemistry.chemical_compound ,Colloid and Surface Chemistry ,Vaterite ,Prospective Studies ,Chromatography ,biology ,Lactoferrin ,Chemistry ,021001 nanoscience & nanotechnology ,Decomposition ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Bioavailability ,Calcium carbonate ,biology.protein ,0210 nano-technology ,Tannins - Abstract
Microencapsulation helps to improve bioavailability of a functional whey protein, lactoferrin (Lf), in adults. Herein, we report the Lf loading capacity (LC) and retention efficiency (RE) in the microparticles of surface-reacted calcium carbonate (SRCC) of different types and compare them to those of widely used vaterite microparticles. The LCs and REs are analyzed in connection to the total surface area and the volume of intraparticle pores. The best performing SRCC3 demonstrates Lf LC of 11.00 wt% achieved in a single absorption step and 74% RE after two cycles of washing with deionized water. A much larger surface area of SRCC templates and a lower pH required to release Lf do not affect its antitumor activity in MCF-7 assay. Layer-by-Layer assembly of pepsin-tannic acid multilayer shell around Lf-loaded microparticles followed by acidic decomposition of the inorganic core produces microencapsulated Lf with a yield ~36 times higher than from vaterite templates reported earlier, while the scale of encapsulated Lf production is ~12,000 times larger. In vitro digestion tests demonstrate the protection of ~65% of encapsulated Lf from gastric digestion. The developed capsules are prospective candidates for functional foods fortified with Lf.
- Published
- 2021
15. Police Supervision: In search for the origins
- Author
-
Vladimir V. Kiryukhin
- Subjects
General Medicine - Abstract
The article analyzes the formation of personalized police supervision. The author concludes that the foundations of police supervision were laid in France. With the development of the theory of rights and freedoms, the introduction of a number of changes in legislation concerning the search for improving administrative supervision, the French Republic abandoned personalized police supervision in favor of resettlement of repeat offenders to the overseas territories of the metropolis.
- Published
- 2021
16. Vibration Transmission Through Compensators of Power Plants Pipelines and Methods for Its Reduction1
- Author
-
O. O. Mil’man, A. V. Kiryukhin, I. S. Serbin, and L. N. Serezhkin
- Subjects
Physics ,Computational model ,Oscillation ,Orders of magnitude (temperature) ,Acoustics ,Energy Engineering and Power Technology ,02 engineering and technology ,01 natural sciences ,Power (physics) ,Vibration ,020303 mechanical engineering & transports ,0203 mechanical engineering ,Transmission (telecommunications) ,0103 physical sciences ,Range (statistics) ,010301 acoustics ,Order of magnitude - Abstract
The results of experimental and computational studies to identify the reasons for the increase in the vibration transmission through compensators of pipelines with liquid by several orders of magnitude with increasing frequency are considered. The descriptions of the found physical and computational models of this phenomenon are given. The results of experimental studies carried out on a special stand to study the possibility of reducing this transmission in a wide range of oscillation frequencies from 10 to 300 Hz by an order of magnitude or more by means of passive and active vibration damping methods are given. It has been shown experimentally that in the case of active spatial damping of dynamic forces behind the compensator, the mutual influence of the damping channels can significantly change the efficiency of the system.
- Published
- 2021
17. Financial and Law Ideas of Thinkers of the Period of the Establishment and Adoption of Russian Absolutism
- Author
-
Vladimir V. Kiryukhin
- Subjects
Absolute monarchy ,Political science ,Economic history ,Period (music) - Abstract
The article examines the financial and legal ideas in Russia during the formation and approval of absolutism. The author analyzes the works of Yu. Krizhanicha, A.L. Ordin-Nashchokina, I.T. Pososhkova, Simeona Polotskogo from the point of view of their influence on the development of state thought in Russia. In conclusion, a well-grounded conclusion is made that in the 17 century the Russian economy acquired dynamism, which was largely facilitated by advanced financial and legal ideas that were recognized and implemented during the formation of the Russian state. The internal market became a national market, transportation grew, the urban estates, increasing in number, received greater privileges and became more prosperous. At the same time, the full-fledged results of this policy could be seen only in the 18 century.
- Published
- 2020
18. Experimental Complex TAIGA
- Author
-
N. Ushakov, N. B. Lubsandorzhiev, E. A. Kravchenko, Yu. Lemeshev, D. Chernykh, E. E. Korosteleva, Anatoly Lagutin, L. V. Pankov, A. Garmash, R. P. Kokoulin, A. V. Skurikhin, P. Volchugov, Andrey Sokolov, V. V. Prosin, D. A. Podgrudkov, A. L. Pakhorukov, Dmitry Chernov, M. Blank, A. Tanaev, L. G. Sveshnikova, L. G. Tkachev, E. A. Osipova, M. Slunechka, V.A. Tabolenko, Dieter Horns, M. Tluczykont, R. D. Monkhoev, I. I. Astapov, E. Popova, A. Chiavassa, A. Pushnin, M. Ternovoy, I. I. Yashin, A. N. Dyachok, Grigory Rubtsov, P. Bezyazykov, N. N. Kalmykov, D. Shipilov, M. Popesku, A. A. Petrukhin, A. Ivanova, Alexander Kryukov, Y. Sagan, A. Sidorenkov, Evgenii V Rjabov, V. Poleshchuk, D. Voronin, V. S. Ptuskin, Roman Raikin, B. A. Tarashchansky, Mikhail Panasyuk, O. A. Gress, V. Kiryukhin, A. Bulan, A. A. Grinyuk, V. A. Kozhin, V. V. Kindin, T. I. Gress, M. Brückner, R. R. Mirgazov, A. Pan, V. Samoliga, A. Vaidyanathan, Y. Kazarina, Oleg Fedorov, Dmitry Zhurov, A. Borodin, R. Mirzoyan, A. Porelli, A. Bonvech, K. G. Kompaniets, O. Grishin, Evgeny Postnikov, Aleksandr Gafarov, A. A. Silaev, A. V. Zagorodnikov, Bayarto Lubsandorzhiev, Y. Suvorkin, L. A. Kuzmichev, V. M. Grebenyuk, and R. Wischnewski
- Subjects
Physics ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,0103 physical sciences ,Taiga ,Astronomy ,010306 general physics ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Cherenkov radiation - Abstract
The astrophysical complex TAIGA (Tunka Advanced Instrument for cosmic-ray physics and Gamma-ray Astronomy), whose first phase is being completed in the Tunka valley 50 km from Lake Baikal, is described. Its research program, first results, and development prospects are discussed.
- Published
- 2020
19. On Building Up Administrative Law Measures Aimed at Combating Activities on the Internet Provoking Suicidal Behavior in Minors
- Author
-
Vladimir V. Kiryukhin
- Subjects
Suicidal behavior ,business.industry ,Administrative law ,The Internet ,General Medicine ,Criminology ,business ,Psychology - Published
- 2020
20. Establishment of the Administrative Activity Concept in Western European and Russian Police Law
- Author
-
Vladimir V. Kiryukhin
- Subjects
Administrative Activity ,Political science ,Law ,General Medicine - Published
- 2020
21. Nuclear-Magnetic Flowmeter-Relaxometers for Monitoring Coolant and Feedwater Flow and Status in Npp
- Author
-
V. V. Davydov, A. V. Kiryukhin, and N. S. Myazin
- Subjects
Materials science ,Nuclear Energy and Engineering ,Transverse relaxation ,020209 energy ,Nuclear engineering ,Flow (psychology) ,0202 electrical engineering, electronic engineering, information engineering ,Boiler feedwater ,Magnetic flow meter ,02 engineering and technology ,Coolant - Abstract
The characteristic operational features of different flowmeters and devices for measuring the coolant and feedwater flows in the loops of nuclear steam generating facilities (NSGF) currently operating in NPP are analyzed. A new design has been developed for labeled nuclear-magnetic flowmeter-relaxometers with a new flow measuring regime. This regime and other new structural solutions in the new devices have made it possible to perform measurements with accuracy to within
- Published
- 2020
22. Simulating the Conditions of Generation for Permeable Geyser Channels in Areas of Acid Volcanism
- Author
-
T. V. Rychkova, A. V. Kiryukhin, and A. V. Sergeeva
- Subjects
Clinoptilolite ,Metals and Alloys ,Geochemistry ,02 engineering and technology ,Volcanism ,engineering.material ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,Heulandite ,01 natural sciences ,Mordenite ,Volcanic glass ,020303 mechanical engineering & transports ,Geophysics ,0203 mechanical engineering ,Rhyolite ,engineering ,Deposition (chemistry) ,Dissolution ,Geology ,0105 earth and related environmental sciences - Abstract
The geysers and paleo-geysers that exist in Kamchatka are situated in volcanogenic artesian basins composed of products of recent acid volcanism. This is in accord with the worldwide patterns for the occurrence of geyser fields. The results of a TOUGHREACT simulation of flow-through ascending circulation of thermal waters, which have chemical compositions in agreement with that of the water in Geyser Valley and which occurs in rhyolite host rocks, showed the generation of channels with high transmitting capacity and lateral self-isolation. This occurs due to the high rate of dissolution for volcanic glass in an axial ascending flow and deposition of silica in the annulus. Studies of mineral composition, as sampled at the surface of cones/gryphons at the Velikan, Bolshoi, and Pervenets geysers, showed them to be dominated by the zeolite mineral phase (heulandite, clinoptilolite, and mordenite) with some minor amounts of amorphous silica (opal).
- Published
- 2020
23. Production Technology Features of Fused-Cast Baddeleyite-Corundum Refractory
- Author
-
M. D. Gasparyan, V. V. Kiryukhin, and V. A. Sokolov
- Subjects
Materials science ,Precipitation (chemistry) ,Metallurgy ,Materials Chemistry ,Ceramics and Composites ,engineering ,Corundum ,engineering.material ,Refractory (planetary science) ,Corrosion ,Baddeleyite - Abstract
The main technological indicators and factors for improving the quality and economic efficiency of fused-cast baddeleyite-corundum refractory production are given. Materials with high corrosion resistance, glass-phase precipitation temperatures above 1450°C, and minimal tendency to precipitate defects in the molten mass could be produced by optimizing the BC-33 refractory composition while observing the mass ratios ZrO2 :SiO2 = 2:1 and SiO2 :Na2O ≥ 12. Such quality indicators are achieved only if oxidative melting of the refractories is used, including arc-melting of the charge and gas-air treatment of the melt.
- Published
- 2020
24. Promising Areas for Advanced Training of Subject Teachers in the Training System for Participants of the All-Russian Olympiad for Schoolchildren
- Author
-
V. Kiryukhin, Valentina Abaturova, and Marina Tsvetkova
- Subjects
Medical education ,The All ,Training system ,Olympiad ,Subject (documents) ,General Medicine ,Psychology ,Training (civil) - Abstract
The article describes the problem of the current state of the all-Russian Olympiad of schoolchildren: formed accessible creative environment for children with maximum coverage of students in the school stage of the all-Russian Olympiad in all subjects in all schools of the country, on the one hand, and the lack of systematic training with coverage of all subject teachers in all schools of regions of Russia, on the other hand. The structure and approximate content of the standard training program for subject teachers as school mentors on the specifics of preparing students to participate in the all-Russian Olympiad are presented.
- Published
- 2020
25. Technological features of the production of fused-cast baddeleyite-corundum refractories
- Author
-
V. V. Kiryukhin, V. A. Sokolov, and M. D. Gasparyan
- Subjects
Materials science ,Precipitation (chemistry) ,Metallurgy ,General Engineering ,engineering ,Corundum ,engineering.material ,Refractory (planetary science) ,Electric arc furnace ,Corrosion ,Baddeleyite - Abstract
The main technological indicators and factors contributing to improving the quality and economic efficiency of the production of fused-cast baddeleyite-corundum refractories are given. Optimization of the composition of the Bk-33 refractory makes it possible to obtain materials with high corrosion resistance, a glass-phase precipitation temperature above 1450 °C and a minimum tendency to release defects in the molten mass while observing the ZrO 2 : SiO 2 = 2 : 1 and SiO 2 : Na 2 O ≥ 12 mass ratios in it. Such quality indicators are achieved only if the technology of oxidative melting of refractories is implemented, including the arc mode of melting the charge and gas-air treatment of the melt. Ill. 3. Ref. 20. Tab. 2.
- Published
- 2020
26. Images of Power in Political Prophecies and Astronomy: Henry VII’s 'The Book of Astrology' as a Visual Source
- Author
-
Dmitriy V. Kiryukhin
- Subjects
Power (social and political) ,Politics ,Astrology ,Philosophy ,media_common.quotation_subject ,Classics ,media_common - Published
- 2020
27. Patrick Colquhoun's Thames River Police as the Precursor of the Modern Police System
- Author
-
Vladimir V. Kiryukhin
- Subjects
General Medicine - Abstract
The article examines the features of the formation of the police system of our time. In the 18th century, the British law enforcement system was on the verge of grandiose reforms. Rapid economic growth and social shifts have revealed the need to ensure public order and security, suppress riots, protect goods and goods in a new format, which required the creation of specialized law enforcement units. The modern form of police law enforcement was implemented in 1829 by Robert Peel, who created the Police Service, the territorial police force responsible for ensuring law and order in Greater London (Metropolitan Police Service).
- Published
- 2021
28. Geothermal resources of Kamchatka and the nearest prospects of their development
- Author
-
A. V. Kiryukhin and V. M. Sugrobov
- Subjects
Heat consumption ,Petroleum engineering ,Electric potential energy ,Heat generation ,Heat supply ,Environmental science ,Electrical performance ,Geothermal gradient - Abstract
The forecast geothermal resources of Kamchatka are sufficient to generate 3900 MW of electrical energy. The same resources for heat supply are estimated at a capacity of 1350 MWt (thermal). Thermohydrodynamic TOUGH2 modeling of exploitation of already identified productive hydrogeothermal reservoirs with installed energy properties allows us to predict: 1) the possibility of increasing the electrical performance of already operating areas of the Mutnovsky field up to 105 MW and the Pauzhetsky field up to 11 MW using binary technologies; 2) the possibility of increasing heat generation at the Paratunskoye field with submersible pumps up to 216 MWt, which will fully ensure the heat consumption of the district heating systems of Petropavlovsk-Kamchatsky.
- Published
- 2019
29. The Geothermal Resources of Kamchatka and the Immediate Prospects of their Extraction
- Author
-
A. V. Kiryukhin and V. M. Sugrobov
- Subjects
Petroleum engineering ,business.industry ,Electric potential energy ,Metals and Alloys ,02 engineering and technology ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,01 natural sciences ,020303 mechanical engineering & transports ,Geophysics ,0203 mechanical engineering ,Extraction (military) ,Electric power ,business ,Geothermal gradient ,Geology ,Thermal energy ,0105 earth and related environmental sciences - Abstract
The probable geothermal reserves of Kamchatka are sufficient to produce 3900 MW of electrical energy. Analogous reserves for heat production are estimated as 1350 MWT (thermal units). The TOUGH2 thermohydrodynamic simulation of extraction for the identified productive geothermal reservoirs with established permeability–capacity and energy properties allows us to predict the following: (1) a possible increase in electrical power production based on the already available areas in the Mutnovsky field to reach up to 105 MW and up to 11 MW in the Pauzhetka field using binary technologies; (2) a possible increase in the production of thermal energy from the Paratunka field using submersible pumps to reach up to 216 MWT, which can supply sufficient heat to the centralized heat systems in Petropavlovsk-Kamchatsky.
- Published
- 2019
30. Investigation of Pressure Pulsations and Power Loads in the Compensator with the Aim of Reducing Vibration Transfer in a Pipeline with a Liquid
- Author
-
L. N. Serezhkin, S. A. Isaev, A. V. Ptakhin, O. O. Mil’man, and A. V. Kiryukhin
- Subjects
Range (particle radiation) ,Materials science ,Mathematical model ,General Engineering ,02 engineering and technology ,Mechanics ,Condensed Matter Physics ,01 natural sciences ,010305 fluids & plasmas ,Compensation (engineering) ,Power (physics) ,Vibration ,Pipeline transport ,020401 chemical engineering ,0103 physical sciences ,Force dynamics ,0204 chemical engineering ,Structural rigidity - Abstract
The authors have developed and investigated experimentally physical and mathematical models to calculate pressure pulsations and dynamic loads produced by them, which determine vibration transfer through compensators of pipelines with a liquid. The loads caused by pressure pulsations may substantially increase with frequency. Consideration has been given to vibration transfer over the structure of the compensator′s elastic elements. The authors have shown analytically and have confirmed experimentally the presence of a broad frequency range, in which the compensation of the forces transferred over the structure by the forces from pressure pulsations occurs. Vibration transfer may be reduced ten or more times compared to the transfer over the structure of the compensator with a liquid. The revealed phenomenon has been explained physically, and the ways of using it in practice have been proposed. At frequencies exceeding this range, the presence of the liquid enhances vibration transfer through the compensator.
- Published
- 2019
31. Using the Paratunsky geothermal field to provide heating for Kamchatka
- Author
-
N. B. Zhuravlev and A. V. Kiryukhin
- Subjects
Field (physics) ,business.industry ,Geothermal reservoir ,Metals and Alloys ,Thermal water ,Environmental engineering ,02 engineering and technology ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,01 natural sciences ,Discharge rate ,020303 mechanical engineering & transports ,Geophysics ,0203 mechanical engineering ,Wastewater ,Extraction (military) ,business ,Geothermal gradient ,Thermal energy ,Geology ,0105 earth and related environmental sciences - Abstract
The Paratunsky geothermal field has been in operation since 1964, mostly in a self-flowing mode, with a discharge rate of approximately 250 kg/s of thermal water at temperatures of 70–90°С (47 Mw, with the waste water having a temperature of 35°С). The water drawn from the field is used for local heating, spa heating, and for greeneries in the villages of Paratunsky and Termal’nyi (3000 residents). The potential market of thermal energy in Kamchatka includes Petropavlovsk-Kamchatskii (180000 residents), Elizovo (39 000), and Vilyuchinsk (22 000). The heat consumption in the centralized heating systems for Petropavlovsk-Kamchatskii is 1 623 000 GCal per annum (216 Mw). A thermohydrodynamic model developed previously is used to show that the Paratunsky geothermal reservoir can be operated in a sustainable mode using submersible pumps at an extraction rate of as much as 1375 kg/s, causing a moderate decrease in pressure (by no more than 8 bars) and temperature (by no more than 4°С) in the reservoir. Additional geothermal sources of heat energy may include the Verkhne-Paratunsky and Mutnovsky geothermal fields.
- Published
- 2019
32. On Separate Organizational and Legal Corruption Countering Measures in the Russian State in the XV to the XVIII Century
- Author
-
Vladimir V. Kiryukhin and Sergey I. Zimin
- Subjects
State (polity) ,Corruption ,Political science ,Political economy ,media_common.quotation_subject ,media_common - Published
- 2019
33. Inversion modeling of the natural state and production history of Mutnovsky geothermal field in 1986-2006
- Author
-
A. V. Kiryukhin and O. O. Usacheva
- Subjects
Mining engineering. Metallurgy ,TN1-997 - Abstract
Numerical 3D model of Mutnovsky geothermal field (Dachny springs), which consist of 517 elements and partially takes into account double porosity, was developed in 1992-1993 using computer program TOUGH2. Calibration of the model was based on data from test yield of the wells and initial distribution of temperature and pressure in the reservoir. This model was used for techno-economic justification of power plant construction (Mutnovskaya GeoES, 2002). The model was recreated in the program PetraSim v.5.2, the calibration was carried out using additional data on production history before year 2006 and inversion iTOUGH2-EOS1 modeling. Comparison of reservoir parameters, estimated using inversion modeling, with previous parameter estimations (given in brackets) showed the following: upflow rate of heat-transfer agent in natural conditions 80.5 (54.1) kg/s, heat flux enthalpy 1430 (1390) kJ/kg, reservoir permeability 27∙10–15-616∙10–15 (3∙10–15-90∙10–15) m2. Inversion modeling was also used to estimate reinjection rates, inflow of meteoric water in the central part of geothermal field and compressibility of reservoir rocks.
- Published
- 2017
- Full Text
- View/download PDF
34. Model of the Regional Network of School of Olympic Reserve in Computer Science
- Author
-
V. Kiryukhin and Marina Tsvetkova
- Subjects
Engineering management ,General Medicine - Abstract
The article deals with the models of the formation of the olympic reserve network school in the Russian Federation as a single environment of the olympiad training of students-participants of the all-Russian olympiad, on the example of the olympiad in Informatics. It is proposed to make full use of network models of educational activities in the integration of schools, universities, organizations of additional education of children in preparation for the olympics, allowing to create and constantly develop an environment of continuous training of participants in the subject of the Russian Federation in partnership with coaches and mentors.
- Published
- 2018
35. Adsorption kinetics of tannic acid onto an albumin-terminated multilayer thin films
- Author
-
Hooi Hong Lau, Nikolai Yakovlev, Maxim V. Kiryukhin, and Chui Ping Ooi
- Subjects
Polymers and Plastics ,Chemistry ,Diffusion ,Kinetics ,02 engineering and technology ,Reversible process ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Colloid and Surface Chemistry ,Adsorption ,Reaction rate constant ,Chemical engineering ,Ellipsometry ,Desorption ,Materials Chemistry ,Physical and Theoretical Chemistry ,0210 nano-technology ,Equilibrium constant - Abstract
The protein-polyphenol multilayer film is a promising material for protection functional food ingredients from gastric digestion and their targeted delivery to small intestine. Here, we study the process of layer-by-layer assembly of bovine serum albumin—tannic acid (BSA-TA) multilayer films by precision ellipsometry. We demonstrate that TA adsorption has both irreversible and reversible components which contribute to 43% and 57% of bound TA molecules, respectively. The kinetic of TA adsorption/desorption process is analyzed using a phenomenological function approach. The rate-limiting stage of the process is the kinetics of molecules adsorption (desorption) to (from) a planar surface and not diffusion of TA molecules from (to) a solution bulk. For irreversible adsorption, the rate constant is 3.9 × 103 M−1 s−1. For the reversible process, the adsorption rate constant, Kads is 5.14 × 103 M−1 s−1; desorption rate constant, Kdes is 79.4 s−1; and equilibrium constant, K is 64.7 M−1.
- Published
- 2018
36. '''Micro-sized ''''pelmeni'''' - A universal microencapsulation approach overview'''
- Author
-
Stefania Boi, Laura Pastorino, Gleb B. Sukhorukov, Jordan Read, Valeriya L. Kudryavtseva, Piotr K. Szewczyk, David Gould, Urszula Stachewicz, and Maxim V. Kiryukhin
- Subjects
Microprinting ,Materials science ,Dispersity ,Polymer capsules ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Soft lithography ,Polylactic acid ,chemistry.chemical_compound ,lcsh:TA401-492 ,General Materials Science ,Solubility ,chemistry.chemical_classification ,Layer-by-layer capsules ,Mechanical Engineering ,Polymer ,021001 nanoscience & nanotechnology ,Polyelectrolyte ,0104 chemical sciences ,Drug delivery ,chemistry ,Chemical engineering ,Mechanics of Materials ,lcsh:Materials of engineering and construction. Mechanics of materials ,0210 nano-technology - Abstract
Microcapsules of customized shapes offer significant advantages over spherical ones, including enhanced internalization by host cells, improved flow characteristics, and higher packing capacity. In our work, we propose a method for defined-shape polymer capsules fabrication inspired by a traditional “pelmeni” (dumplings) making process. The proposed method is based on soft lithography technique. Two different approaches were demonstrated resulting in polyelectrolyte multilayer and poly(lactic acid) (PLA) capsules both showing monodisperse size and shape distribution with about 7 μm long torpedo-like shape. The PLA capsules are described in terms of their morphology, loading of model cargo molecules, cell cytotoxicity and cell uptake. Carboxyfluorescein, FeCl2 ground crystals and Fe3O4 nanopowder were used as model cargoes for microcapsules. Capsules demonstrate core-shell structure, high loading capacity, hydrophilic molecules retention and internalization by cells without causing toxic effects. The loading efficiency of model cargo in PLA capsules was more than 80 wt%, resulting in about 40 pg of carboxyfluorescein inside each capsule. Proposed method allows unique advantages compared with alternative microencapsulation techniques, such as precise control over capsules' geometry, flexibility for the choice of active cargoes, regardless of their solubility and molecular weight and potential for triggered release mechanism.
- Published
- 2021
- Full Text
- View/download PDF
37. Exploring and Modeling the Magma–Hydrothermal Regime
- Author
-
John C. Eichelberger, Silvio Mollo, Marlene Villeneuve, Noriyoshi Tsuchiya, and A. V. Kiryukhin
- Subjects
Magma-hydrothermal ,geothermal energy ,volcanology ,magma convection ,heat transport ,gas and fluid geochemistry ,phreatic eruption ,volcano monitoring ,geophysical imaging ,drilling ,010504 meteorology & atmospheric sciences ,Volcanism ,Magma chamber ,010502 geochemistry & geophysics ,01 natural sciences ,Hydrothermal circulation ,Caldera ,Petrology ,0105 earth and related environmental sciences ,geography ,geography.geographical_feature_category ,lcsh:QE1-996.5 ,Volcanology ,Phreatic eruption ,lcsh:Geology ,Volcano ,Magma ,General Earth and Planetary Sciences ,magma–hydrothermal ,Geology - Abstract
This special issue comprises 12 papers from authors in 10 countries with new insights on the close coupling between magma as an energy and fluid source with hydrothermal systems as a primary control of magmatic behavior. Data and interpretation are provided on the rise of magma through a hydrothermal system, the relative timing of magmatic and hydrothermal events, the temporal evolution of supercritical aqueous fluids associated with ore formation, the magmatic and meteoric contributions of water to the systems, the big picture for the highly active Krafla Caldera, Iceland, as well as the implications of results from drilling at Krafla concerning the magma–hydrothermal boundary. Some of the more provocative concepts are that magma can intrude a hydrothermal system silently, that coplanar and coeval seismic events signal “magma fracking” beneath active volcanoes, that intrusive accumulations may far outlast volcanism, that arid climate favors formation of large magma chambers, and that even relatively dry rhyolite magma can convect rapidly and so lack a crystallizing mush roof. A shared theme is that hydrothermal and magmatic reservoirs need to be treated as a single system.
- Published
- 2020
38. A CO2-Driven Gas Lift Mechanism in Geyser Cycling (Uzon Caldera, Kamchatka)
- Author
-
Gennady Karpov and Alexey V. Kiryukhin
- Subjects
Hot spring ,010504 meteorology & atmospheric sciences ,lcsh:QE1-996.5 ,Gas lift ,modeling ,Inflow ,010502 geochemistry & geophysics ,geyser ,01 natural sciences ,TOUGH2 ,lcsh:Geology ,Electrical conduit ,Uzon ,General Earth and Planetary Sciences ,Temperature recording ,Caldera ,CO2 ,Petrology ,Cycling ,Geology ,0105 earth and related environmental sciences - Abstract
Here, we report on a new geyser (named Shaman) formed in the Uzon caldera (Kronotsky Federal Nature Biosphere Reserve, Russia) in autumn 2008 from a cycling hot Na-Cl spring. The geyser is a pool-type CO2-gas lift driven. From 2012 to 2018, the geyser has shown a rather stable interval between eruptions (IBE) from 129 to 144 min with a fountain height up to 4 m, and the geyser conduit has gradually enlarged. In 2019, the Shaman geyser eruption mode significantly changed: cold water inflow from the adjacent stream was re-directed into the geyser conduit and the average IBE decreased to 80 min. We observed two eruptive modes: a cycling hot spring (June 2019) and a cycling geyser (after June 2019). Bottom-hole temperature recording was performed in the geyser conduit to understand its activity. The TOUGH2-EOS2 model was used to reproduce the obtained temperature records and estimate geyser recharge/discharge parameters in both modes. Modeling shows that a larger cold inflow into the conduit causes a switch from cycling geyser to hot cycling spring mode. It was also found that the switch to cycling geyser mode corresponds to a larger mass of CO2 release during the time of the eruption
- Published
- 2020
- Full Text
- View/download PDF
39. Naturally inspired polyelectrolyte multilayer composite films synthesised through layer-by-layer assembly and chemically infiltrated with CaCO
- Author
-
Iffat F, Patel, Maxim V, Kiryukhin, Nikolai L, Yakovlev, Himadri S, Gupta, and Gleb B, Sukhorukov
- Abstract
Naturally occurring composite structures like antler bone and nacre have a highly ordered structural design at the nanoscale. Nature's successful architecture has attracted widespread interest in mimicking such systems artificially, the goal being to design tough composite materials with adaptable mechanical properties. Here we report results on synthesis pathways towards fabricating such materials, including a chemical infiltration route where calcium carbonate particles nucleate and grow inside polyelectrolyte multilayers assembled via a layer-by-layer route. SEM analysis demonstrates a considerable change in the morphology of thin films upon chemical infiltration. The depth of mineralisation within the multilayer is confirmed by TOF-SIMS studies of both mineralised and non-mineralised thin films. TGA was used to calculate the overall content of CaCO
- Published
- 2020
40. Magma Fracking Beneath Active Volcanoes Based on Seismic Data and Hydrothermal Activity Observations
- Author
-
Evgenia Chernykh, Alexey Solomatin, A. V. Kiryukhin, and Andrey Polyakov
- Subjects
geography ,hydrothermal ,geography.geographical_feature_category ,kamchatka ,010504 meteorology & atmospheric sciences ,Subduction ,Volcanic belt ,magma ,lcsh:QE1-996.5 ,Silicic ,Volcanism ,volcanoes ,010502 geochemistry & geophysics ,01 natural sciences ,Hydrothermal circulation ,lcsh:Geology ,Volcano ,Sill ,fracking ,Magma ,General Earth and Planetary Sciences ,Petrology ,Geology ,0105 earth and related environmental sciences - Abstract
Active volcanoes are associated with microearthquake (MEQ) hypocenters that form plane-oriented cluster distributions. These are faults delineating a magma injection system of dykes and sills. The Frac-Digger program was used to track fracking faults in the Kamchatka active volcanic belt and fore-arc region of Russia. In the case of magma laterally injected from volcanoes into adjacent structures, high-temperature hydrothermal systems arise, for example at Mutnovsky and Koryaksky volcanoes. Thermal features adjacent to these active volcanoes respond to magma injection events by degassing CO2 and by transient temperature changes. Geysers created by CO2-gaslift activity in silicic volcanism areas also flag magma and CO2 recharge and redistributions, for example at the Uzon-Geyserny, Kamchatka, Russia and Yellowstone, USA magma hydrothermal systems. Seismogenic faults in the Kamchatka fore-arc region are indicators of geofluid fracking, those faults can be traced down to 250 km depth, which is within the subduction slab below primary magma sources.
- Published
- 2020
41. Thermal-permeability structure and recharge conditions of the Mutnovsky high-temperature geothermal field (Kamchatka, Russia)
- Author
-
A. V. Kiryukhin, P. A. Kiryukhin, Andrey Polyakov, and O.O. Usacheva
- Subjects
geography ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,Water injection (oil production) ,Groundwater recharge ,010502 geochemistry & geophysics ,01 natural sciences ,Geophysics ,Impact crater ,Volcano ,Geochemistry and Petrology ,Magma ,Meteoric water ,Petrology ,Geothermal gradient ,Volcanic cone ,Geology ,0105 earth and related environmental sciences - Abstract
The Mutnovsky geothermal area is part of the Eastern Kamchatka active volcano belt. Mutnovsky, 80 kY old and an aging strato-volcano (a complex of 4 composite volcanic cones), acts as a magma- and water-injector into the 25-km-long North Mutnovsky extension zone. Magmatic injection events (dykes) are associated with plane-oriented MEQ (Micro Earth Quakes) clusters, most of them occurring in the NE sector of the volcano (2 × 10 km2) at elevations from −4 to −2 km, while some magmatic injections occur at elevations from −6.0 to −4.0 km below the Mutnovsky production field. Water recharge of production reservoirs is from the Mutnovsky volcano crater glacier (+1500 to +1800 masl), which was confirmed by water isotopic data (δD, δ18O) of production wells at an earlier stage of development. The Mutnovsky (Dachny) 260–310 °C high-temperature production geothermal reservoir with a volume of 16 km3 is at the junction of NNE- and NE-striking normal faults, which coincides with the current dominant dyke injection orientation. TOUGH2-modeling estimates of the reservoir properties are as follows: the reservoir permeability is 90–600 e-15 m2, the deep upflow recharge is 80 kg/s and the enthalpy is 1420 kJ/kg. Modeling was used to reproduce the history of the Mutnovsky (Dachny) reservoir exploitation since 1983 with an effective power of 48 MWe by 2016. Modeling also showed that the reservoir is capable of yielding 65–83 MWe of sustainable production until 2055, if additional production drilling in the SE part of the field is performed. Moreover, this power value may increase to 87–105 MWe if binary technologies are applied. Modeling also shows that the predicted power is sensitive to local meteoric water influx during development. Conceptual iTOUGH2-EOS1sc thermal hydrodynamic modeling of the Mutnovsky magma-hydrothermal system as a whole reasonably explains its evolution over the last 1500–5000 years in terms of heat recharge (dyke injection from the Mutnovsky-4 funnel) and mass recharge (water injection through the Mutnovsky-2 and Mutnovsky-3 funnels) conditions as previously mentioned.
- Published
- 2018
42. Test Results of an Active System for Reducing Vibration Forces and Pressure Pulsations
- Author
-
A. V. Ptakhin, L. N. Serezhkin, O. O. Mil’man, and A. V. Kiryukhin
- Subjects
Materials science ,Physics and Astronomy (miscellaneous) ,Frequency band ,Acoustics ,02 engineering and technology ,01 natural sciences ,Vibrator (mechanical) ,010305 fluids & plasmas ,Vibration ,020401 chemical engineering ,Transmission (telecommunications) ,0103 physical sciences ,Broadband ,Astrophysics::Solar and Stellar Astrophysics ,Digital control ,0204 chemical engineering ,Reduction (mathematics) ,Common emitter - Abstract
The absence of literature data on active reduction of the transmission of vibrations and pulsations of pressure through pipeline compensators with liquid is noted. A prototype of active broadband vibration damping system has been studied. The system is intended to determine the transmission of pressure pulsations through pipeline compensators with liquid. We present the results of active system testing with electromagnetic vibrator as a source of compensating force, a piezoceramic emitter as a source of compensating pressure pulsations, and a digital control device. Reducing the forces and pressure pulsations to 18 dB in the frequency band from 10 to 246 Hz has been obtained.
- Published
- 2018
43. Protein-tannic acid multilayer films: A multifunctional material for microencapsulation of food-derived bioactives
- Author
-
Brendan J. Haigh, Maxim V. Kiryukhin, Hooi Hong Lau, Harjinder Singh, Gleb B. Sukhorukov, Marina V. Novoselova, Nicole C. Roy, Regan Murney, Su Hui Lim, and Nikolai Yakovlev
- Subjects
Biocompatible Materials ,Capsules ,Lactoglobulins ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Immunoglobulin G ,Biomaterials ,chemistry.chemical_compound ,Drug Delivery Systems ,Colloid and Surface Chemistry ,Adsorption ,Tannic acid ,Animals ,Humans ,Bovine serum albumin ,Gastric Juice ,Chromatography ,biology ,Chemistry ,Serum Albumin, Bovine ,Adhesion ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,biology.protein ,Degradation (geology) ,Cattle ,Caco-2 Cells ,0210 nano-technology ,Digestion ,Tannins ,Layer (electronics) - Abstract
The benefits of various functional foods are often negated by stomach digestion and poor targeting to the lower gastrointestinal tract. Layer-by-Layer assembled protein-tannic acid (TA) films are suggested as a prospective material for microencapsulation of food-derived bioactive compounds. Bovine serum albumin (BSA)-TA and pepsin-TA films demonstrate linear growth of 2.8 ± 0.1 and 4.2 ± 0.1 nm per bi-layer, correspondingly, as shown by ellipsometry. Both multilayer films are stable in simulated gastric fluid but degrade in simulated intestinal fluid. Their corresponding degradation constants are 0.026 ± 0.006 and 0.347 ± 0.005 nm−1 min−1. Milk proteins possessing enhanced adhesion to human intestinal surface, Immunoglobulin G (IgG) and β-Lactoglobulin (BLG), are explored to tailor targeting function to BSA-TA multilayer film. BLG does not adsorb onto the multilayer while IgG is successfully incorporated. Microcapsules prepared from the multilayer demonstrate 2.7 and 6.3 times higher adhesion to Caco-2 cells when IgG is introduced as an intermediate and the terminal layer, correspondingly. This developed material has a great potential for oral delivery of numerous active food-derived ingredients.
- Published
- 2017
44. Thermal and permeability structure and recharge conditions of the low temperature Paratunsky geothermal reservoirs in Kamchatka, Russia
- Author
-
L.A. Vorozheikina, A. V. Kiryukhin, P. A. Kiryukhin, and P.О. Voronin
- Subjects
Pressure drop ,Hydrology ,geography ,Hydrogeology ,geography.geographical_feature_category ,Renewable Energy, Sustainability and the Environment ,business.industry ,020209 energy ,Geothermal energy ,Magnetic dip ,Geology ,02 engineering and technology ,Groundwater recharge ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,01 natural sciences ,Hydraulic fracturing ,Volcano ,0202 electrical engineering, electronic engineering, information engineering ,business ,Petrology ,Geothermal gradient ,0105 earth and related environmental sciences - Abstract
The Paratunsky low temperature geothermal field has been operating since 1964. During the period of exploitation from 1966 to 2014, 321 Mt of thermal water (Cl-Na, Cl-SO4-Na composition, M up to 2600 ppm) with temperatures of 70–100°С was extracted and used for district heating, balneology and greenhouses. The structure of the 40 km3 Paratunsky low temperature (80–110 °C) geothermal volcanogenic reservoir was geometrically characterized, hot water upflow regions and the 3D permeability distribution were identified with hydrogeological data, and the distribution of the feed zones and 3D temperatures were constrained by 3D spline approximation. Water isotope and gas (N2, 96–98%) data analysis indicated that the main recharge region of the Paratunsky geothermal reservoirs is the Viluychinsky Volcano (2173 masl) and adjacent highly elevated structures, located 25 km south from the geothermal field. Production zones coinciding with dip angle fractures occur in the condition of radial extension (possibly caused by magmatic origin heat sources below the reservoir) and hydraulic fracturing (possibly caused by the elevated position of the Viluychinsky Volcano’s recharge region). TOUGH2 modeling of the thermo-hydrodynamic natural state and the history of exploitation (involving pressure, temperature and chemical changes response to utilization) between 1965 and 2014 yield estimates of hot water upflow rates (190 kg/s), the production reservoir compressibility (up to 4 × 10−8 Pa−1) and permeability (up to 1.4 D). Modeling confirmed areal discharge of the thermal water from the production reservoir in the top groundwater aquifer (top Dirichlet boundary conditions). Modeling of the chemical (Cl-) history of exploitation provides an explanation of gradual Cl- accumulation due to the inflow of chloride-containing water through the eastern (open) boundary of the geothermal reservoirs. Modeling of the long-term exploitation until 2040 with an exploitation load of 256 kg/s merely shows a low pressure drop (0.7 bar) and an insignificant drop of temperatures in the production geothermal reservoir of the Paratunsky geothermal field.
- Published
- 2017
45. Magmatic plumbing systems of the Koryakskii–Avacha Volcanic Cluster as inferred from observations of local seismicity and from the regime of adjacent thermal springs
- Author
-
A. V. Kiryukhin, S. A. Fedotov, E. V. Chernykh, and P. A. Kiryukhin
- Subjects
geography ,Hot spring ,Dike ,geography.geographical_feature_category ,Корякский ,010504 meteorology & atmospheric sciences ,Fissure ,Metals and Alloys ,Geophysics ,Induced seismicity ,38.37.25 Вулканология ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,01 natural sciences ,Авачинский ,medicine.anatomical_structure ,Shear (geology) ,Volcano ,Sill ,Cluster (physics) ,medicine ,Petrology ,Geology ,0105 earth and related environmental sciences - Abstract
An analysis of local seismicity within the Avacha–Koryakskii Volcanic Cluster during the 2000–2016 period revealed a sequence of plane-oriented earthquake clusters that we interpret as a process of dike and sill emplacement. The highest magmatic activity occurred in timing with the 2008–2009 steam–gas eruption of Koryakskii Volcano, with magma injection moving afterwards into the cone of Avacha Volcano (2010–2016). The geometry of the magma bodies reflects the NF geomechanical conditions (tension and normal faults, $$S_V>S_{H_{\text{max}}}>S_{h_{\text{min}}}$$ ) at the basement of Koryakskii Volcano dominated by vertical stresses S v , with the maximum horizontal stress $$S_{h_{\text{max}}}$$ pointing north. A CFRAC simulation of magma injection into a fissure under conditions that are typical of those in the basement of Koryakskii Volcano (the angle of dip is 60°, the size is 2 × 2 km2, and the depth is –4 km abs.) showed that when the magma discharge is maintained at the level of 20000 kg/s during 24 hours the fissure separation increases to reach 0.3 m and the magma injection is accompanied by shear movements that occur at a rate as high as 2 × 10–3 m/s, thus corresponding to the conditions of local seismic events with Mw below 4.5. We are thus able to conclude that the use of planeoriented clusters of earthquakes for identification of magma emplacement events is a physically sound procedure. The August 2, 2011 seismicity increase in the area of the Izotovskii hot spring (7 km from the summit of Koryakskii Volcano), which is interpreted as the emplacement of a dike, has been confirmed by an increase in the spring temperature by 10–12°C during the period from October 2011 to July 2012.
- Published
- 2017
46. Recharge Conditions of the Low Temperature Paratunsky Geothermal Reservoir, Kamchatka, Russia
- Author
-
A. V. Kiryukhin, P. O. Voronin, L. A. Vorozheikina, E.V. Kartasheva, N. V. Obora, and N. P. Asaulova
- Subjects
Hydrology ,geography ,geography.geographical_feature_category ,business.industry ,020209 energy ,Geothermal energy ,Geothermal reservoir ,Elevation ,Geochemistry ,Earth and Planetary Sciences(all) ,02 engineering and technology ,General Medicine ,Groundwater recharge ,Hydrothermal circulation ,Volcano ,0202 electrical engineering, electronic engineering, information engineering ,Zoning ,business ,Geothermal gradient ,Geology - Abstract
The Paratunsky geothermal field is a classic example of a low temperature hydrothermal reservoir of meteoric origin. Hydrogeochemical zoning reflects a different intensity of water exchange in the Western and Eastern sites of the field. The hydrogeochemical history of operations 1966-2015 shows the involvement of chloride waters across the field's Eastern boundary. Water recharge to the Paratunsky geothermal field is provided mostly by meteoric waters from elevations above +1150 masl. The most likely area of water recharge to the Paratunsky geothermal fields is the Vilyuchinsky volcano (elevation 2173 m abs.).
- Published
- 2017
47. Biodegradable Multilayer Capsules for Functional Foods Applications
- Author
-
Ece Kilic, Hooi Hong Lau, and Maxim V. Kiryukhin
- Published
- 2019
48. Isotopes & Geochemistry: Tools For Geothermal Reservoir Characterization (Kamchatka Examples)
- Author
-
Pavel Voronin, A. V. Kiryukhin, Larisa Vorozheikina, Elena Kartasheva, Vasily Lavrushin, Nikita Zhuravlev, N. P. Asaulova, Ivan Chernev, Andrey Polyakov, and Tatiana Rychkova
- Subjects
lcsh:GE1-350 ,Hydrogeology ,Isotope ,Geothermal reservoir ,Geochemistry ,Groundwater recharge ,Geothermal gradient ,Hydrothermal circulation ,Geology ,lcsh:Environmental sciences - Abstract
The thermal, hydrogeological, and chemical processes affecting Kamchatka geothermal reservoirs were studied by using isotope and geochemistry data: (1) The Geysers Valley hydrothermal reservoirs; (2) The Paratunsky low temperature reservoirs; (3) The North-Koryaksky hydrothermal system; (4) The Mutnovsky high temperature geothermal reservoir; (5) The Pauzhetsky geothermal reservoir. In most cases water isotope in combination with Cl- transient data are found to be useful tool to estimate reservoirs natural and disturbed by exploitation recharge conditions, isotopes of carbon-13 (in CO2) data are pointed either active magmatic recharge took place, while SiO2 and Na-K geothermometers shows opposite time transient trends (Paratunsky, Geysers Valley) suggest that it is necessary to use more complicated geochemical systems of water/mineral equilibria.
- Published
- 2019
49. Law Enforcement in Transport by Internal Affairs Agencies: Historical, Legal and Organizational Aspects
- Author
-
N. N. Pestov, V. V. Kiryukhin, and I. L. Yanchenko
- Subjects
Law ,Law enforcement ,Business - Published
- 2019
50. Modeling and observations of geyser activity in relation to catastrophic landslides–mudflows (Kronotsky nature reserve, Kamchatka, Russia)
- Author
-
A. V. Kiryukhin
- Subjects
Hydrology ,010504 meteorology & atmospheric sciences ,Mass flow ,Water injection (oil production) ,Landslide ,Groundwater recharge ,Inflow ,010502 geochemistry & geophysics ,01 natural sciences ,Geophysics ,Electrical conduit ,Geochemistry and Petrology ,Mudflow ,Water cycle ,Geology ,0105 earth and related environmental sciences - Abstract
This study reports and interprets observational data of geyser cycling in the Valley of Geysers and Uzon hydrothermal systems between 2007 and 2015. The monitoring of the Velikan and Bolshoy Geysers after the catastrophic landslide on 3.06.2007 (which dammed and created Podprudnoe Lake, drowning some geysers) and before a mudflow on 3.01.2014 (which destroyed the dam and almost completely drained Podprudnoe Lake) shows that the interval between eruptions (IBE) of the Bolshoy Geyser decreased from 108 to 63 min and that the IBE of the Velikan Geyser slowly declined over three years from 379 min to 335 min. The seasonal hydrological cycle of the Velikan Geyser shows an increase in the IBE during winter (average of 41 min). The dilution of the chloride deep components of the Bolshoy (− 23%) and Velikan Geysers (− 12%) is also observed. A local TOUGH2 model of the Velikan Geyser is developed. This model is used to describe the transient thermal hydrodynamic and CO 2 changes in a Velikan Geyser conduit during the entire cycling process by using cyclic, time-dependent boundary mass flow conditions (major eruption discharge and sub-cyclically assigned CO 2 mass flow recharge into the base of the geyser conduit and water recharge at the mid-height of the geyser conduit) and a constant mass flow of water into the geyser at depth. This model also indicates a seepage element at the conduit's top to allow pre-eruptive discharge and a buffering isothermal reservoir below to compensate for pressure declines from major eruptions at earlier times. A local TOUGH2 model is successfully calibrated against temperature observations at both the mid-height and base of the conduit of the Velikan Geyser, which shows the essential role of the above parameters in describing the functionality of the geyser. A reservoir model of shallow production geysers is also developed. This 2D model is used to describe changes in the thermal hydrodynamic state and evolving chloride concentrations in the areas of most prominent discharge, both at steady state and when perturbed by cold water injection from Podprudnoe Lake and other cold water sources (after 3.06.2007). A “well on deliverability” option is used to model the geyser discharge features in the model. The modeled increases in geyser discharge that is caused by an increase in the reservoir pressure from cold water injection reasonably matches observations of IBE decreases in the Bolshoy (~ 58%) and Velikan Geysers (~ 9%). The modeling also shows the possibility of chloride dilution in the Velikan Geyser but no dilution in the Bolshoy Geyser. The latter observation is attributed to the presence of direct cold water inflow into the Bolshoy Geyser conduit.
- Published
- 2016
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.