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Journal of Energy Chemistry 2022年第6期31卷 576-584,I0016页

作者： Denis Osinkin Evgeniy Tropin Laboratory of Solid Oxide Fuel Cells Institute of High-Temperature ElectrochemistryYekaterinburg 620137Russian Federation School of Economics and Management Department of Environmental EconomicsUral Federal UniversityYekaterinburg 620002Russian Federation Laboratory of Solid State Chemistry Institute of Solid State Chemistry and MechanochemistryNovosibirsk 630128Russian Federation

In recent years, interest in hydrogen as a fuel has sharply increased in the field of alternative and green energy due to its high energy capability and zero-emission behaviour. As a result, research in the development of new highly efficient methods for producing high-purity hydrogen is relevant. This paper presents, for the first time, the test results of an electrochemical cell with a proton-conducting La_(0.9)Sr_(0.1)ScO_(3-δ) electrolyte and symmetrical Sr_(1.95)Fe_(1.4)Ni_(0.1)Mo_(0.5)O_(6-δ)+ La_(0.9)Sr_(0.1)Sc_(0.9)Co_(0.1)O_(3-δ) electrodes as a hybrid setup for electricity generation in proton ceramic fuel cell mode, for hydrogen separation from H_(2)+ Ar mixture and the production of high-purity hydrogen from methane with simultaneous CO_(2) *** was found that this electrochemical cell generates high flow rates of hydrogen during its separation through a proton-conducting membrane from H_(2)+ Ar mixture, about 500 cm^(3)h^(-1)cm^(-2)at a current density of 0.6 A cm^(-2)as well as about 370 cm^(3) h^(-1)cm^(-2)at a current density of 0.5 A cm^(-2) from CH_(4)+ CO_(2) mixture at 800 ℃ which shows that these cells are promising for hydrogen production.

关键词： Protonic ceramic fuel cell Hydrogen production Symmetrical electrodes Sr_(2)Fe_(1.5)Mo_(0.5)O_(6–δ) CO_(2)utilization

Kinetics and mechanism of natural wolframite interactions with sodium carbonate

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International Journal of Minerals,Metallurgy and Materials 2019年第11期26卷 1364-1371页

作者： Evgeniy Nikolaevich Selivanov Kirill Vladimirovich Pikulin Lyudmila Ivanovna Galkova Roza Iosifovna Gulyaeva Sofia Aleksandrovna Petrova Institute of Metallurgy of the ural branch of the russian academy of sciences

The kinetics and mechanism of natural wolframite interactions with sodium carbonate during air heating were studied.X-ray phase and X-ray microanalysis were used to establish that the initial monocrystalline wolframite consists of Fe0.5 Mn0.5 WO4 and Fe0.3 Mn0.7 *** thermal analysis showed that the interaction of wolframite with sodium carbonate begins above 450°C with the formation of tungstate,sodium ferrite,iron oxides,and *** experiments on sintering with the subsequent removal of water-soluble compounds(leaching)tracked the change in the structure of *** atomic ratio of Fe/Mn in wolframite does not change up to 600°C,and subsequently decreases to 0.2 during heating,which allows the mechanism of the process to be identified and indicates the greater reactivity of wolframites with an increased proportion of *** analysis with data processing using non-isothermal kinetics established that the interaction of wolframite with sodium carbonate in an air stream proceeds via a two-stage mechanism,wherein the first stage is limited by diffusion(activation energy,E=243 kJ/mol)and the second stage is limited by autocatalysis(activation energy,E=212 k J/mol)due to the formation of a Na2 WO4–Na2 CO3 eutectic.

关键词： wolframite structure sodium carbonate sintering thermal analysis kinetics

Root structure syndromes of four families of monocots in the Middle urals

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Plant Diversity 2023年第6期45卷 722-731页

作者： Anna A.Betekhtina Daria E.Tukova Denis V.Veselkin ural Federal University Named After the First President of Russia B.N.Yeltsin 19 Mira StreetEkaterinburg 620002Russia ural branch of the russian academy of sciences Institute of Plant and Animal Ecology8 Marta StreetEkaterinburg 620144Russia

The present article tests the following general assumption:plant taxa with different specializations towards mycorrhizal interactions should have different root *** of 61 species common in boreal zone were studied:16 species of Poaceae,24 species of Cyperaceae,14 species of Orchidaceae,and 7 species of *** a fixed material of 5 individuals of each species,the following was determined:number of orders of branching roots;transverse dimensions of root,stele and cortex;number of primary xylem vessels and exodermis layers;length of root hairs;abundance of *** of each family had well-defined *** of Orchidaceae and Iridaceae were thick with a large stele and developed *** had no branching roots and had long root *** Iridaceae,roots were branched,and root hairs were *** of Poaceae and Cyperaceae were thin with a relatively thin *** hairs were short in Poaceae and long in *** finding that root syndromes of four families of monocots differed is a new and unexpected *** high specificity of root syndromes in Cyperaceae,Iridaceae,Poaceae,and Orchidaceae indicates that species of these families use different strategies to obtain water and soil nutrients.

关键词： Monocots Poaceae Cyperaceae Orchidaceae Iridaceae Syndromes of roots structure

Use of nanoscale metals in poultry diet as a mineral feed additive

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Animal Nutrition 2020年第2期6卷 185-191页

作者： Еlena Sizova Sergey Miroshnikov Svyatoslav Lebedev Boris Usha Sergey Shabunin Federal Research Centre of Biological Systems and Agrotechnologies of the russian academy of sciences Orenburg460000Russia Orenburg State University Orenburg460018Russia Moscow State University of Food Production Moscow125080Russia Federal State Budget Scientific Institute(All-russian Veterinary Research Institute of Pathology Pharmacology and Therapy)Voronezh394087Russia

The research was aimed at studying the efficiency of a nanoscale alloy of copper(Cu) and zinc(Zn) to be used as a mineral additive for feeding broiler chickens,compared to inorganic and organic forms of these *** studies of the blood serum were performed using an automated *** mineral composition was determined by atomic emission and mass spectrometry(MS-ISP),The study was performed on broiler chickens of cross Smena 7(n=72) in the conditions of a *** were3 treatment groups with 24 chickens in *** the inorganic form of mineral supplements with the nanosized alloy resulted in a positive productive effect,with a tendency to increasing the content of serum *** nano scale form of metals improved(P <0.05) the activity of *** the same time,the liver micro structure of experimental groups is similar to that of the *** was a moderate plethora and poor polymorphoncellular infiltration around the interlobular triads with a clear morphological orga nization of the stromal and parenchymal co mponents of the ***,the lack of oxidative stress was confirmed by the dynamics of catalase(CT),total superoxide dismutase(TSOD) and malondialdehyde(MDA) levels,and the concentrations of which did not exceed the reference level Replacing Cu and Zn sulfates with the nanoscale alloy(group 1) and organic form(group 2) of these elements in the diet of broiler chickens was accompanied by the increasing pool of these elements in the organisms at the end of the *** was accumulated throughout the experiment in experimental group 1,compared to the reference,with the maximum difference in the liver of 36.5%(P ≤ 0.05),in the feathers 2.5 times(P ≤ 0.01).Assessment of the Zn level dynamics in the feathers revealed a well noticeable tendency to reducing its concentrations during the experiment in all *** the background of feeding a nanoscale alloy,Zn concentration in the liver exceeded th

关键词： Broiler chicken Feeding Mineral supplement Nanoscale metal

Highly transparent ytterbium doped yttrium lanthanum oxide ceramics

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Journal of Rare Earths 2014年第3期32卷 254-258页

作者： M.Ivanov Yu.Kopylov V.Kravchenko 李江 A.Medvedev 潘裕柏 Institute of Electrophysics UrB of RAS 106Amundsena 620016 Ekaterinburg Russia Institute of Radioengineering and Electronics named after V.A. Kotelnikov RAS Vvedensky Sq. 1 Fryazino Moscow region 141120 Russia Shanghai Institute of Ceramics Chinese Academy of Science ural Federal University 19 Mira 620002 Ekaterinburg Russia

To prepare ytterbium doped lanthania yttria nanopowder a method of laser evaporation of mixed oxides was used. After calcinations of the powder at 1200 ℃ a pure single-phase solid solution yb3＋：（LaxY1-x）2O3 was formed in the nanoparticles. Influence of lanthanum oxide as an isovalent additive on the yttria structure was investigated. The lanthanium ions were proved to be a good aid to sinter yttria ceramics doped with Yb3＋ at moderate temperatures about 1650 ℃. The ceramics with relative density higher than 99.99% and grain size about 40 μm were fabricated. Full transmittance of 1.8 mm thick Yb0.11 La0.23Y1.66O3 ceramics reached 82.5% at 800 nm. This material could be a good gain medium for ytterbium high power pulse lasers.

关键词： RE-doped ceramics nanopowders ytterbium oxide transparency

Thermal conductivity of systems with a gap in the phonon spectrum

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Chinese Physics B 2018年第7期27卷 424-430页

作者： E Salamatov Udmurt Federal Research Center Ural Branch of the Russian Academy of Sciences

An original theoretical model for describing the low-temperature thermal conductivity in systems with a region of forbidden values （a gap） in the phonon spectrum is proposed. The model is based on new experimental results on the temperature dependence of the phonon diffusion coefficient in nanoceramics and dielectric glasses which showed a similar anomalous behavior of the diffusion coefficient in these systems that may be described under the assumption of a gap in the phonon spectrum. In this paper, the role of the gap in low-temperature behavior of the thermal conductivity, ~＇（T）, is analyzed. The plateau in the temperature dependence of the thermal conductivity is shown to correlate with the position and the width of the gap. The temperature dependence of thermal conductivity of such systems when changing the scat- tering parameters related to various mechanisms is studied. It is found that the umklapp process （U-processes） involving low-frequency short-wavelength phonons below the gap forms the behavior of the temperature dependence of thermal con- ductivity in the plateau region. A comparison of the calculated and experimental results shows considerable possibilities of the model in describing the low-temperature thermal conductivity in glass-like systems.

关键词： phononic band gap phonon diffusion coefficient thermal conductivity glassy crystals

Expansion of Juniperus sibirica *** a response to climate change and associated effect on mountain tundra vegetation in the Northern urals

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Journal of Mountain Science 2020年第10期17卷 2339-2353页

作者： Andrey A.GRIGORIEV Yulia V.SHALAUMOVA Olga V.EROKHINA Svetlana Yu.SOKOVNINA Elizaveta I.VATOLINA Martin WILMKING Institute of Plant and Animal Ecology UB RAS Laboratory of Geoinformation TechnologyEkaterinburgRussia Institute of Industrial Ecology UB RAS Laboratory of Mathematical Modeling in Ecology and MedicineEkaterinburgRussia Institute of Plant and Animal Ecology UB RAS Laboratory of Vegetation and Mycobiota BiodiversityEkaterinburgRussia Institute of Plant and Animal Ecology UB RAS Laboratory of Dynamics of Arctic EcosystemsLabytnangiRussia Department of Forest Taxation and Forest Management Institute of Forest and Nature ManagementUral state Forest Engineering UniversityEkaterinburgRussia Institute for Botany and Landscape Ecology Greifswald UniversityGreifswaldGermany

Shrub expansion into arctic and alpine tundra is one of the prominent vegetation changes currently *** studied the expansion of shrub vegetation into high elevation tundra in the Kvarkush Range of the Northern ural mountains,*** structure analysis of the dominant shrub Juniperus sibirica *** to support ongoing upslope advance of shrubs,a process particularly active in the second half of the 20 th *** found a close connection between the expansion of shrub vegetation and the general change in climatic conditions of the cold season(months with mean airtemperature below 0°Сfrom November to March).In general,the greatest influence on the distribution of *** is exerted by the climate conditions of the beginning(November-January)and the end(March)of the cold *** increasing elevation,the correlation coefficients between the establishment of *** shrubs and the precipitation of the beginning of the cold season increased,and reached maximum values at the top elevation level of the study ***,the upwards shift of *** into typical mountain tundra does not lead to changes in the ecological structure of vegetation at this stage,but simply a decrease in the area of mountain tundra.

关键词： Juniperus sibirica Expansion Tundra Vegetation Plant communities Climate changes Northern ural mountains

A one-stage model of experimental acute necrotizing pancreatitis in rats

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中国病理生理杂志 2013年第10期29卷 1870-1876页

作者： SARAPULTSEV Alexey RANTSEV Maxim SARAPULTSEV Petr MEDVEDEVA Svetlana DANILOVA Irina Institute Immunology and Physiology the Ural Branch of Russian Academy of Sciences

AIM:To establish a one-stage model of experimental acute necrotizing pancreatitis(ANP)in rats characterized by the simplicity of performance and a high degree of ***:ANP modeling in rats was performed based on modification of the ligation model as follows:synthetic material ligature using an atraumatic needle was performed to capture pancreatic gland ducts and marginal duodenum *** tips were exteriorized to the abdominal wall,and the ligature was skinned over to avoid catching intestine *** macroscopic appearance and histological changes were *** biochemical and hemostatic indicators were also ***:Laboratory analysis of rats with experimental ANP showed a pattern of disturbances similar to that observed during pancreatic necrosis in humans as soon as the first *** blood analysis revealed enhanced leukocytosis and alterations in leukogram characteristics,indicating acute *** levels of amylase,aspartate aminotransferase and creatinine significantly increased(P<0.05).Hemostatic indicators showed alterations indicating formation of disseminated intravascular coagulation,and signs of endotoxicosis were *** typical pancreatic necrosis patterns of disturbances were validated by the results of histological ***:Histological changes and laboratory indicators confirm the development of a suitable model of ANP.

关键词： Pancreatitis,acute necrotizing Rats Endotoxemia

Previously unknown behavior in parasitic cuckoo females:male-like vocalization during migratory activity

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Avian Research 2021年第1期12卷 1-16页

作者： Swetlana G.Meshcheryagina Alexey Opaev Institute of Plant and Animal Ecology Ural Branch of the Russian Academy of SciencesEkaterinburgRussia A.N.Severtsov Institute of Ecology and Evolution Russian Academy of SciencesMoscowRussia

Background:In the last decade,enigmatic male-like cuckoo calls have been reported several times in East *** calls exhibited a combination of vocal traits of both Oriental Cuckoo(Cuculus optatus)and Common Cuckoo(Cuculus canorus)advertising calls,and some authors therefore suggested that the enigmatic calls were produced by either Common×Oriental Cuckoo male hybrids or Common Cuckoo males having a gene ***,the exact identity of calling birds are still ***:We recorded previously unknown male-like calls from three captive Oriental Cuckoo females,and compared these calls with enigmatic vocalizations recorded in the wild as well as with advertising vocalizations of Common and Oriental Cuckoo *** achieve this,we measured calls ***,we video-recorded captive female emitting male-like calls,and compared these recordings with the YouTube recordings of calling males of both Common and Oriental Cuckoos to get insight into the mechanism of call ***:The analysis showed that female male-like calls recorded in captivity were similar to enigmatic calls recorded in the ***,Oriental Cuckoo females might produce the latter *** features of these female calls appeared to be unusual among ***,females produced male-like calls at the time of spring and autumn migratory activity and on migration in the *** of this,functional significance of this call remained ***,the male-like female call unexpectedly combined features of both closed-mouth(closed beak and simultaneous inflation of the‘throat sac')and open-mouth(prominent harmonic spectrum and the maximum neck extension observed at the beginning of a sound)vocal ***:The Cuculus vocalizations outside the reproductive season remain poorly ***,we found for the first time that Oriental Cuckoo females can produce male-like calls in that *** of its rarity,this call might be an ***,fe

关键词： Closed-mouth vocal behavior Cuckoo call Cuculus optatus Female song Male-like vocalization

Climate change evidence in tree growth and stand productivity at the upper treeline ecotone in the Polar ural Mountains

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Forest Ecosystems 2020年第1期7卷 76-91页

作者： Nadezhda M.Devi Vladimir V.Kukarskih Аrina A.Galimova Valeriy S.Mazepa Andrey A.Grigoriev Institute of Plant and Animal Ecology Ural BranchRussian Academy of Sciences8 Marta202/3Ekaterinburg 620144Russia

Background:Recent warming is affecting species composition and species areal distribution of many ***,although most treeline studies have estimated the rates of forest expansion into tundra,still little is known about the long-term dynamic of stand productivity at the forest-tundra ***,we make use of tree-ring data from 350 larch(Larix sibirica Ledeb.)and spruce(Picea obovata Ledeb.)sampled along the singular altitudinal treeline ecotone at the Polar urals to assess the dynamic of stand establishment and productivity,and link the results with meteorological observations to identify the main environmental ***:The analysis of stand instalment indicated that more than 90%of the living trees appeared after *** this period,the stand became denser and moved 50m upward,while in recent decades the trees of both species grew *** maximum afforestation occurred in the last decades of the twentieth century,and the large number of encountered saplings indicates that the forest is still *** upward shift coincided with a slight increase of May-August and nearly doubling of September-April precipitation while the increase in growth matched with an early growth season warming(June+0.27°C per decade since 1901).This increase in radial growth combined with the stand densification led to a 6-90 times increase of biomass since ***:Tree-ring based twentieth century reconstruction at the treeline ecotone shows an ongoing forest densification and expansion accompanied by an increased *** changes are driven by climate change mechanism,whereby the leading factors are the significant increase in May-June temperatures and precipitation during the dormant *** of phytomass accumulation mechanisms within treeline ecotone is valuable for improving our understanding of carbon dynamics and the overall climate balance in current treeline ecosystems and for predicting how these will be altered by global ch

关键词： Polar urals Treeline Productivity Climate change Radial growth Recruitment Larch Spruce