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Zoological Systematics 2024年第4期49卷 285-298页

作者： Elena Fefilova aleksandr Novikov Elizaveta Popova Maksim Golubev aleksandra Bakashkina Ilya Velegzhaninov Institute of Biology Komi Scientific CentreUral Branch of the Russian Academy of Sciences28 Kommunisticheskaya StSyktyvkar 167982Russia Kazan Federal University 18 Kremlyovskaya420008 KazanRussia Pitirim Sorokin Syktyvkar State University 55 Oktyabrskyi Ave.Syktyvkar 167001Russia

Ancient Lake Baikal(LB)is the prime hotspot of the harpacticoid *** Canthocamptidae harpacticoids in the lake can be considered at least six species *** lacks of unequivocal diagnostic characters in the family species description often lead species identification to an *** developed molecular techniques provide a powerful tool to subject copepod taxa to comparative *** order to provide a new base for canthocamp-tids taxonomy and clarify the systematic in some species flocks,we analyzed the mitochondrial DNA marker COI of 103 harpacticoid specimens from LB belonging to five *** materials were obtained from different lake basins from the depths 0.2-1632 *** DNA barcoding,we identified 23 genetic species or groups of species,it was almost 1.5 times less than number of morphological species,and divergence of some molecular lineages were not corresponding to morphological *** of our study were the discovery of a new species,males of some morphological species,for which only females were previously described,clarification of the level of morphological variability of some species,***,it became apparent that morphological and genetic harpacticoid species diversity in LB differ significantly and it has to be detected strictly in complex.

关键词： Harpacticoid copepods species identification COI mtDNA molecular analysis Baikalian endemics Bayesian analysis

The Biodiversity of Shrimp Genus Artemia from Russian Lakes:Morphometric,Cytogenetics and DNA-analysis

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 58-60页

作者： Elena BOYKO Lyudmila LITVINENKO aleksandr LITVINENKO FSEI HPE FSUE

Shrimps of genus Artemia are the inhabitants of continental and marine waters with salinity of 70 to 350 g/l and *** is able to survive in the conditions in which other animals cannot *** is due to adaptations:effective osmoregulation system,the ability to synthesize of respiratory pigment(hemoglobin)and diapauses cysts(Litvinenko ***.,2009).Cysts of this

关键词： Artemia morphometric analysis cytogenetic analysis DNA analysis salinity.

Permafrost distribution and temperature in the Elkon Horst, Russia

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Research in Cold and Arid Regions 2021年第2期13卷 107-122页

作者： Mikhail Zhelezniak QingBai Wu Anatolii Kirillin Zhi Wen aleksandr Zhirkov Vladimir Zhizhin Melnikov Permafrost Institute SB RAS Yakutsk 677000Russia State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesCASLanzhouGansu 730000China

The Elkon Horst is a geological structure that consists of heterogeneous strata with highly variable geocryological and temperature conditions. Gaining accurate knowledge of permafrost distribution patterns within this structure is of both scientific and practical importance. In mountainous terrain, the ground thermal regime is controlled by both surface and subsurface conditions. Surface conditions include snow cover characteristics, the presence or absence of vegetation, vegetation density, etc.. In contrast, subsurface conditions involve rock lithology or petrography, density, quantity and depth of fissures, groundwater, etc.. This article examines ground thermal regimes in various geomorphological settings based on temperature measurement data from geotechnical boreholes. The occurrence and extent of permafrost were evaluated for the entire horst area using direct and indirect methods. The maximum permafrost thickness measured in the Elkon Horst is 330 m, and the estimated maximum is 450 m at higher elevations. Thermophysical properties were determined for the major rock types, and the geothermal heat flux was estimated for the study area. The thermal conductivities were found to vary from 1.47 to 4.20 W/(m·K), and the dry bulk densities to range between 2,236 kg/m~3 and 3,235 kg/m~3. The average geothermal heat flux was estimated to be 44 mW/m~2.

关键词： permafrost ground temperature geothermal heat flux thermal conductivity horst

Coupling model for an extended-range plasmonic optical transformer scanning probe

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Light(Science & Applications) 2014年第1期3卷 129-134页

作者： aleksandr Polyakov Mauro Melli Giuseppe Cantarella Adam Schwartzberg Alexander Weber-Bargioni P James Schuck Stefano Cabrini Lawrence Berkeley National Laboratory BerkeleyCA 94720USA

The expansion of nanoscale optics has generated a variety of scanning probe geometries that yield spatial resolution below 10 *** this work,we present a physical model for coupling far-field radiation to plasmonic modes on the surface of a scanning probe,and propose a scheme for extending the working distance of such a *** a subsurface application,an optical transformer at the tip of a probe can be coupled to a remote near-field antenna placed inside the sample at a distance away from the surface,expanding the effective working distance up to 100 nm.

关键词： optical transformer plasmonic tip plasmon coupling

Influence of shielding gas and non-consumable electrode configuration on weld formation

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China Welding 2021年第4期30卷 17-24页

作者： aleksandr Savinov Oleg Polesskiy Vladimir Lysak Pavel Krasikov Artem Chudin Volgograd State Technical University Lenin av.28Volgograd400005Russia

The effect of the shielding gas composition and the cathode processing history on the weld formation quality during welding with a non-consumable electrode at high current was studied. The major reasons for pores, “waists” and undercuts formation during welding at high currents and speed are discrete melt movement to the solidification front due to the arc decline from the cathode axis and significant melt overhanging in the pool tail part caused by excessive peak pressure on the discharge axis. Cathode flow dispersion causes the lack of displacement of the molten metal which results in its laminar flow in the weld pool, uniform flow of the metal to the crystallization front and sound weld formation. The melt movement in the weld pool and eventually the welded joint quality is determined by the pressure distribution pattern on the welded metal surface and the anode spot lag from the electrode. It was demonstrated that non-consumable electrode configurations that provide arcing with a diffuse cathode spot and increased helium concentration in the inert atmosphere during welding with a conical electrode allow sound weld formation.

关键词： tungsten inert gas welding non-consumable electrode inert gas weld seam formation

Agglomeration of coal and polyethylene mixtures during fixed‑bed co‑gasification

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International Journal of Coal Science & Technology 2024年第2期11卷 91-100页

作者： Igor G.Donskoy aleksandr N.Kozlov Maksim V.Penzik Denis A.Svishchev Lu Ding Melentiev Energy Systems Institute Russian Federation130 Lermontova StreetIrkutskRussia 664033 East China University of Science and Technology 130 Meilong RoadShanghai 200237China

The article presents the results of experimental studies on the gasification of mixtures of brown coal and polyethylene(up to 20 wt%fraction)in a laboratory *** work aims to study the agglomeration process during the heating and oxidation of the *** measurement results(gas composition,pressure drop)provide indirect information on the dynamics of thermal decomposition and structural changes in the fuel *** have shown that the interaction between polyethylene and a coal surface leads to the formation of dense agglomerates,in which the molten polymer acts as a *** form as a result of interfacial interactions between components and filtration flow *** hydrogen/carbon ratio in the solid residue of coal-polyethylene co-gasification increases from 0.07–0.2 to 1.11,indicating the formation of stable hydrocarbon compounds on the carbon *** conducted research makes it possible to identify possible interactions between chemical reactions and transfer processes that lead to agglomeration in mixtures of coal with polyethylene.

关键词： Coal Polyethylene Gasification Combustion Agglomeration

An Integrated Oil Production Enhancement Technology Based on Waterflooding Energy Recovery

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Fluid Dynamics & Materials Processing 2023年第2期19卷 285-301页

作者： aleksandr Lekomtsev Vitaliy Bakaneev Ivan Stepanenko Petr Maximov Yulia Rozhkova Alexey Dengaev Wanli Kang Perm National Research Polytechnic University Perm614990Russian Department of Oil Field Development and Operation Gubkin Russian State University of Oil and GasMoscow119991Russia China University of Petroleum(East China) Qingdao266000China

A new integrated oil production enhancement technology based on water-flooding energy recovery is *** providing an extensive review of the existing scientific and technical literature on this subject,the proposed integrated technology is described together with the related process flow diagram,the criteria used to select a tar-get facility for its implementation and the outcomes of the laboratory studies conducted to analyze emulsion formation and separation ***,the outcomes of numerical simulations performed using Ansys CFX software are also *** to these results,using the proposed approach the incremental oil production may reach 1.2 t/day(with a 13%increase)and more,even at low flow rates(less than 10 t/day),thereby providing evidence for the benefits associated with this integrated technology.

关键词： Oil production jet pump waterflooding system energy recovery Ansys CFX

Pt-Al<sub>2</sub>OM<sub>3</sub>Composite Material Designed for Cyclic Production of Optical Glasses under High Temperature Conditions

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Journal of Materials Science and Chemical Engineering 2014年第3期2卷 30-36页

作者： aleksandr Bochegov aleksandr Ermakov Irina Vandysheva IFE UrFU Yekaterinburg Russia JSC Urals’ Innovation Technologies Yekaterinburg Russia

The article considers one of the possible approaches to the solution of an urgent issue of metal consumption reduction, increase of operating life and maximum operating temperature as well as reduction of irrecoverable losses of platinum products and alloys when operating under high temperature conditions, particularly for glassblowing and single crystal growing crucibles. A two-layered composite material based on platinum-group metals and corundum plasma ceramics is thoroughly investigated. A successful experience of crucibles exploitation, designed for production of high temperature optical glasses from the composite and results of the research on composite material specimens are described.

关键词： Sandwich-Structured Composite Material Plasmaceramics Platinum-Group Metals Reduction of Metal Consumption Crucibles for Glassblowing and Single Crystal Growing High Temperature Creep High Temperature Strength and Heat Resistance Irrecoverable Losses

Nanoscale inhibition of polymorphic and ambidextrous lAPP amyloid aggregation with small molecules

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Nano Research 2018年第7期11卷 3636-3647页

作者： aleksandr Kakinen Jozef Adamcik Bo Wang Xinwei Ge Raffaele Mezzenga Thomas P. Davis Feng Ding Pu Chun Ke ARC Centre of Excellence in Convergent Bio-Nano Science and Technology Monash Institute of Pharmaceutical Sciences Monash University 381 Royal Parade Parkville VIC 3052 Australia Food & Soft Materials Department of Health Sciences & Technology ETH Zurich Schmelzbergstrasse 9 LFO E23 8092 Zurich Switzerland Department of Physics andAstronomy Clemson University Clemson SC29634 USA Department of Chemistry Warwick University Gibbet Hill Coventry CV4 7AL UK

Understanding how small molecules interface with amyloid fibrils at the nanoscale is of importance for developing therapeutic treatments against amyloid-based diseases. Here, we show for the first time that human islet amyloid polypeptides （LAPP） in the fibrillar form are polymorphic, ambidextrous, and possess multiple periodicities. Upon interfacing with the small molecule epigallocatechin gallate （EGCG）, IAPP aggregation was rendered off-pathway and assumed a form with soft and disordered clusters, while mature IAPP fibrils displayed kinks and branching but conserved the twisted fibril morphology. These nanoscale phenomena resulted from competitive interactions between EGCG and the IAPP amyloidogenic region, as well as end capping of the fibrils by the small molecule. This information is crucial in delineating IAPP toxicity implicated in type 2 diabetes and for developing new inhibitors against amyloidogenesis.

关键词： islet amyloid polypeptides(LAPP) fibriUization persistence length small molecule discrete moleculardynamics (DMD)simulations inhibition

Tailoring the LiNbO_(3)coating of Ni-rich cathode materials for stable and high-performance all-solid-state batteries

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Nano Research Energy 2022年第3期1卷 4-10页

作者： Seyedhosein Payandeh Florian Strauss Andrey Mazilkin aleksandr Kondrakov Torsten Brezesinski Battery and Electrochemistry Laboratory Institute of NanotechnologyKarlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Karlsruhe Nano Micro Facility Karlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany BASF SE Carl-Bosch-Str.3867056 LudwigshafenGermany

The research and development of advanced nanocoatings for high-capacity cathode materials is currently a hot topic in the field of solid-state batteries(SSBs).Protective surface coatings prevent direct contact between the cathode material and solid electrolyte,thereby inhibiting detrimental interfacial decomposition *** is particularly important when using lithium thiophosphate superionic solid electrolytes,as these materials exhibit a narrow electrochemical stability window,and therefore,are prone to degradation during battery *** we show that the cycling performance of LiNbO_(3)-coated Ni-rich LiNi_(x)Co_(y)Mn_(z)O_(2)cathode materials is strongly dependent on the sample history and(coating)synthesis *** demonstrate that post-treatment in a pure oxygen atmosphere at 350℃results in the formation of a surface layer with a unique microstructure,consisting of LiNbO_(3)nanoparticles distributed in a carbonate *** tested at 45℃and C/5 rate in pellet-stack SSB full cells with Li_(4)Ti_(5)O_(12)and Li_(6)PS_(5)Cl as anode material and solid electrolyte,respectively,around 80%of the initial specific discharge capacity is retained after 200 cycles(~160 mAh·g^(−1),~1.7 mAh·cm^(−2)).Our results highlight the importance of tailoring the coating chemistry to the electrode material(s)for practical SSB applications.

关键词： solid-state battery layered Ni-rich oxide cathode superionic solid electrolyte protective surface coating side reactions