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Elucidating elusive quaternary selenide EuCeCuSe3:Synthesis,crystal structure,properties and theoretical studies

Journal of Rare Earths 2024年第1期42卷 163-171,I0006页

作者： Maxim V.Grigoriev Anna V.Ruseikina Maxim S.Molokeev Vladimir A.Chernyshev Aleksandr S.Aleksandrovsky Alexander S.Krylov Svetlana N.Krylova Nikolai P.Shestakov Dmitriy A.Velikanov Alexander A.Garmonov Alexey V.Matigorov Evgeny A.Ostapchuk Thomas Schleid Damir A.Safin Laboratory of Theory and Optimization of Chemical and Technological Processes University of TyumenVolodarskogo Str.6625003TyumenRussian Federation Kirensky institute of Physics Federal Research Center KSC SB RASAkademgorodok 50 Bld.38660036KrasnoyarskRussian Federation Department of Physics Far Eastern State Transport UniversitySerysheva Str.47680021KrasnoyarskRussian Federation institute of Natural sciences and Mathematics Ural Federal University Named After the First President of Russia B.N.YeltsinMira Str.19620002EkaterinburgRussian Federation Department of Photonics and Laser Technology Siberian Federal UniversitySvobodnii Ave.79660079KrasnoyarskRussian Federation institute of Physics and Technology University of TyumenVolodarskogo Str.6625003 TyumenRussian Federation institute for Inorganic Chemistry University of StuttgartPfaffenwaldring 55D-70569StuttgartGermany Scientific and Educational and Innovation Center for Chemical and Pharmaceutical Technologies Ural Federal University named after the First President of Russia B.N.YeltsinMira Str.19620002 EkaterinburgRussian Federation University of Tyumen Volodarskogo Str.6625003TyumenRussian Federation

We report on the novel heterometallic quaternary selenide EuCeCuSe3,the fabrication of which has been a challenge until this *** structure of the reported selenide was elucidated from the powder X-ray diffraction data,which revealed the formation of EuCeCuSe3with excellent yield(96.7%)accompanied with a minor fraction of CeSe2(3.3%),and was best solved in orthorhombic space group Pnma with the BaLaCuS3structural ***,the crystal structure of the title compound completes the row of the heterometallic quaternary selenides EuRECuSe3(RE=La,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Y),of which the cerium-based derivative exclusively belongs to the BaLaCuS3structural *** distortion of the CuSe4polyhedron was compared for the whole series of EuRECuSe3compounds using theτ4-descriptor for four coordinated ions,which revealed the highest degree of distortion for the Ce3+-containing selenide,followed by the La3+-based ***,the crystallographic and geometrical parameters of the reported selenide were discussed in comparison to the Ce3+-based sulfides SrCeCuS3and *** initio calculations of the crystal structure,a phonon spectrum and elastic constants for the crystal of EuCeCuSe3were also *** types and wavenumbers of fundame ntal modes were determined and the involvement of ions participating in the phonon modes was *** experimental IR spectrum of the reported selenide was interpreted and found to be in agreement with the calculated *** experimental direct band gap of EuCeCuSe3was measured to be 1.36 eV that is consistent with the concept of its origin due to interband transitions between orbitals emerging mainly from 4f(valence band)and 5d(conduction band)levels of the Eu2+*** dependence of the Young’s modulus on the direction demonstrates the anisotropy of the elastic properties,while the Vickers hardness for EuCeCuSe3was calculated to be 5.2 ***,the title compound is paramagnetic above 4 K.

关键词： Quaternary selenide Synthesis Crystal structure Ab initio calculations Magnetic measurements Spectroscopy

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Catalytic co-combustion of biomass and brown coal in a fluidized bed:Economic and environmental benefits

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Journal of Environmental sciences 2024年第6期140卷 24-36页

作者： Yury V.Dubinin Nikolay A.Yazykov Petr M.Yeletsky Roman B.Tabakaev Aleksandra I.Belyanovskaya Vadim A.Yakovlev Federal Research Center Boreskov institute of Catalysis sb RAS Lavrentiev Ave.5Novosibirsk630090Russia University of Tyumen Volodarskogo str.6Tyumen625003Russia

The work is devoted to the study of combustion of brown coal,pine sawdust,and their mixtures in a fluidized bed of catalyst at 600-750℃.It is shown that an increase in the content of sawdust in a mixture with brown coal leads to an increase in the burnout degree of solid fuel from 94.4%to 99.9%,while the emission of greenhouse gases in the form of CO_(2)CO and NOxis reduced(CO_(2)from the biomass is not included in the balance).The high content of alkaline earth metal oxides(CaO and MgO)in the mineral part of brown coal,sawdust,and their mixtures eliminates the emission of sulfur oxides and the slagging of heat-exchange surfaces during the combustion in a fluidized bed of *** optimal temperature,when the highest burnout degree of the above fuels is achieved in the combustion is 750℃.It is also shown that the increase in temperature and the content of sawdust in the composition of the fuel mixtures has a positive effect on the economic and environmental process indicators.

关键词： Co-combustion Fluidized catalyst bed Biomass Coal Economic effect Environmental impact

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Environmental Changes and Human Impacts on Landscapes near Medieval Steklyanukha-2 Fortress in Russia from Early Iron Age to Modern Times

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Chinese Geographical Science 2023年第1期33卷 69-84页

作者： RAZJIGAEVA Nadezhda GANZEY Larisa KORNYUSHENKO Tatiana GREBENNIKOVA Tatiana KUDRYAVTSEVA Ekaterina PISKAREVA Yana PROKOPETS Stanislav Pacific Geographical institute Far Eastern Branch of the Russian Academy of SciencesVladivostok 690041Russia institute of History Archaeologyand Ethnography of the Peoples of the Far EastFar Eastern Branch of the Russian Academy of SciencesVladivostok 690091Russia

The development of landscapes in one of the most populated river basins of the southern russian Far East was studied using pollen and diatom data. The study sites were a multi-layered mountain fortress, Steklyanukha-2, and an Upper Holocene high floodplain sequence of the Steklyanukha River. Buried soil from the fluvial section acts as an environmental archive of the time in which people from the Yankovskaya archeological cultures settled in the river basin. The soil was formed under conditions of decreasing water supply in the valley and prolonged droughts. Findings of pollen Fagopyrum and Urtica signal economic activity in the Early Iron *** lake sediments accumulated from 1.6 to 0.5 kyr, when the valley was actively developed during the Middle Ages. There are signals of the development of secondary birch and oak forests. In the cultural layer of the fortress and lake sediments formed in the Middle Ages, Ambrosia and Xanthium pollens were found and are reliable evidence of agricultural activity in the valley. The pollens of plants typically seen in human-disturbed areas were also found. Indirect evidence of human activity includes non-pollen *** study of diatoms in a depression near a rampart confirmed the archaeologists' assumption that it was used as a water reserve. Pollen spectra from surface soils reflect agricultural activity in the river basin since the second half of the 19th century. The largest amount of pollen of alien and synanthropic plants and weeds, as well as spores of pathogenic fungi and fire indicators, were found here.

关键词： ancient agriculture mountain fortress humidity changes pollen diatoms

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The Holocene environmental changes revealed from the sediments of the Yarkov sub-basin of Lake Chany,south-western Siberia

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Geoscience Frontiers 2023年第2期14卷 133-153页

作者： S.K.Krivonogov A.N.Zhdanova P.A.Solotchin A.Y.Kazansky V.V.Chegis Z.Liu M.Song S.V.Zhilich N.A.Rudaya X.Cao O.V.Palagushkina L.B.Nazarova L.S.Syrykh institute of Geology and Mineralogy Russian Academy of SciencesSiberian BranchNovosibirskRussia Novosibirsk State University NovosibirskRussia Korkyt Ata Kyzylorda University KyzylordaKazakhstan Moscow State University MoscowRussia Geological institute Russian Academy of SciencesMoscowRussia Pushkov institute of Terrestrial Magnetism Ionosphere and Radio Wave PropagationRussian Academy of SciencesTroitskRussia Department of Earth sciences The University of Hong KongHong KongChina State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’anChina institute of archaeology and ethnography Russian Academy of SciencesSiberian BranchNovosibirskRussia Tomsk State University TomskRussia Alpine Paleoecology and Human Adaptation Group(ALPHA) State Key Laboratory of Tibetan Plateau Earth SystemEnvironment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina Volga Region Federal University KazanRussia Krasnoyarsk Science Center Russian Academy of SciencesSiberian BranchKrasnoyarskRussia Herzen State Pedagogical University St.PetersburgRussia

Lake Chany is the largest endorheic lake in Siberia whose catchment is entirely on the territory of *** geographical location on the climate-sensitive boundary of wet and dry landscapes provides an opportunity to gain more knowledge about environmental changes in the West Siberian interior during the Holocene and about the evolution of the lake *** cores obtained from the Yarkov subbasin of the lake in 2008 have been comprehensively studied by a number of approaches including sedimentology and AMS dating,pollen,diatom and chironomid analyses(with statistical interpretation of the results),mineralogy of authigenic minerals and geochemistry of plant lipids(biomarker analysis.).Synthesis of new results presented here and published data provides a good justification for our hypothesis that Lake Chany is very young,no older than 3.6 ka *** that,between 9 and 3.6 ka BP,the Chany basin was a swampy landscape with a very low sedimentation rate;it could not be identified as a water *** the early lake phase,between 3.6 and 1.5 ka BP,the lake was shallow,1.2–3.5 m in depth,and it rose to its modern size,up to 6.5 m in depth,during the last *** data reveal important changes in the understanding of the history of this large endorheic lake,as before it was envisioned as a large lake with significant changes in water level since ca.14 ka *** addition to hydrology,our proxies provide updates and details of the regional vegetation and climate change since ca.4 ka BP in the WestSiberian forest-steppe and *** evolution of the Chany basin is dependent on hydroclimatic changes in a large region of southern West Siberia,we compare lake-level change and climate-change proxies from the other recently and most comprehensively studied lakes of the region.

关键词： Saline lake Multiproxy study Holocene Climate Environment West Siberia

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Reactive SPS of Al_(2)O_(3)–RE:YAG(RE=Ce;Ce+Gd)composite ceramic phosphors

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Journal of Advanced Ceramics 2023年第5期12卷 1015-1032页

作者： Denis Yu.Kosyanov Anastasia A.Vornovskikh Oleg O.Shichalin Evgeniy K.Papynov Anton A.Belov Aleksandra A.Kosianova Aleksandr N.Fedorets Andrei A.Leonov Alexey P.Zavjalov Sergey A.Tikhonov Yanbin Wang Ziqiu Cheng Xin Liu Jiang Li Far Eastern Federal University Vladivostok 690922Russia institute of Automation and Control Processes Far Eastern Branch of the Russian Academy of SciencesVladivostok 690041Russia Laboratory of Methods of Synchrotron Radiation Institute of Solid State Chemistry and MechanochemistrySiberian Branch of the Russian Academy of SciencesNovosibirsk 630128Russia Kamchatka Branch of Geophysical Survey of the russian academy of sciences Petropavlovsk-Kamchatsky 683006Russia Key Laboratory of Transparent Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Ultrafine-grained Al_(2)O_(3)–rare earth:yttrium aluminium garnet(Al_(2)O_(3)–RE:YAG)(RE=Ce;Ce+Gd)composite ceramics were obtained for the first time by reactive spark plasma sintering(SPS)using commercially available initial oxide *** effect of key sintering parameters(temperature,dwell time,and external pressure(P_(load)))on densification peculiarities,structural-phase states,and luminescent properties of composites was studied *** in phase formation and densification between Ce-doped and Ce,Gd-codoped systems were *** of reactive SPS,at which there is partial melting with the formation of near-eutectic zones of the Al_(2)O_(3)–YAG system/coexistence of several variations of the YAG-type phase,were *** corundum–garnet biphasic ceramics with an optimal balance between microstructural and luminescence performance were synthesized at 1425℃/30 min/30–60 *** external quantum efficiency(EQE)of the phosphor converters reached 80.7%and 72%with close lifetime of~63.8 ns,similar to those of commercial Ce:YAG materials,which is promising for further applications in the field of high-power white light-emitting diodes(WLEDs)and laser diodes(LDs).

关键词： alumina–Ce^(3+)-doped yttrium aluminium garnet(Al_(2)O_(3)–Ce:YAG)ceramic phosphors reactive spark plasma sintering(SPS) structural-phase states microstructure luminescence performance

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Shock-wave impact on the knee joint affected with osteoarthritis and after arthroplasty

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Defence Technology（防务技术） 2023年第2期20卷 1-10页

作者： Galina Eremina Alexey Smolin institute of Strength Physics and Materials Science of Siberian Branch of russian academy of sciences 2/4pr.AkademicheskiiTomsk634055Russia

Degenerative diseases significantly reduce the quality of human ***-invasive treatments are used in the initial stages of osteoarthritis(OA).Total knee arthroplasty is used in the late stages of osteoarthritis of the knee ***-invasive methods based on mechanical action are also used for the rehabilitation of a patient after *** paper presents numerical models of the knee joint with degenerative OA changes and *** these models,a computational study was made of the influence of the intensity of shock-wave exposure on the conditioning for the regeneration of bone and cartilage *** on the modeling results,it was found that in the knee joint with degenerative OA changes,conditions for the regeneration of cartilage and meniscus tissues were fulfilled under medium and highintensity *** high-intensity loading(up to 0.9 m J/mm^(2)),the stress level was significantly below the ultimate value required for *** knee arthroplasty,the conditions for bone tissue regeneration around the tibia component are fulfilled only under high-intensity loading.

关键词： Knee joint Total knee replacement Shock-wave therapy Computer simulation Method of movable cellular automata

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Mathematical Modeling of Biological Fluid Flow Through a Cylindrical Layer with Due Account for Barodiffusion

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Communications on Applied Mathematics and Computation 2023年第4期5卷 1365-1384页

作者： N.N.Nazarenko A.G.Knyazeva institute of Strength Physics and Materials Science Siberian Branch of the Russian Academy of SciencesTomsk634021Russia

The work proposes a model of biological fluid flow in a steady mode through a cylindrical layer taking into account convection and *** model considers finite compressibility and concentration expansion connected with both barodiffusion and additional mechanism of pressure change in the pore volume due to the concentration ***,the model is entirely *** paper highlights the complexes composed of scales of physical quantities of different *** iteration algorithm for the numerical solution of the problem was developed for the coupled *** work involves numerical studies of the considered effects on the characteristics of the flow that can be convective or diffusive,depending on the relation between the dimensionless *** is demonstrated that the distribution of velocity and concentration for different cylinder wall thicknesses is *** is established that the barodiffusion has a considerable impact on the process in the convective mode or in the case of reduced cylinder wall thickness.

关键词： Filtration Diffusion Convective and diffusive flow regimes Barodiffusion

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贝加尔地区萨彦山东部Jom-Bolok火山谷湖泊古环境研究（英文）

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Journal of Geographical sciences 2019年第11期29卷 1823-1840页

作者： Alexander SHCHETNIKOV Elena V. BEZRUKOVA institute of the Earth’s Crust sb russian academy of sciences Irkutsk 664033Russia Vinogradov institute of Geochemistry sb russian academy of sciences Irkutsk 664033Russia Irkutsk State University Irkutsk 664033Russia institute of archaeology and ethnography sb russian academy of sciences Novosibirsk 630090Russia

This article describes the lake basins of the Jom-Bolok volcanic region in the East Sayan (the largest manifestation of the Holocene eruptions in Central Asia).The geomorphological position,origins,aspects of the structure and development are reviewed considering its sedimentary *** limnic morphogenesis here develops under the conditions of contrasting relief,high energy of neotectonic and exogenous *** established that Lake Khara-Nur,formed as a result of lava-damming of the Jom-Bolok river valley,emerged in its present form approximately 6500 years ago.A complex record on the environment and climatic changes,acquired from its sediments,made it possible to determine for the first time in this region the long-term trends in the development of the Middle and Late Holocene mountain geosystems and also the distinction of several paleogeographic stages of the formation of the natural *** average geochemical record resolution for the bottom sediments of the lake was made uniquely for the East Siberian lake records and is equal to 35 years,while the palynological record approximates 110 years.

关键词： lake morphogenesis Holocene volcanism lava-dammed lakes environmental change

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Zircon Xenocrysts from the Shaka Ridge Record Ancient Continental Crust:New U-Pb Geochronological and Oxygen Isotopic Data

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Journal of Earth Science 2022年第1期33卷 5-16页

作者： Sergey G.Skublov Natalia A.Rumyantseva Qiuli Li Boris G.Vanshtein Dmitriy I.Rezvukhin Xianhua Li institute of Precambrian Geology and Geochronology of russian academy of sciences St.Petersburg 199034Russia Saint Petersburg Mining University St.Petersburg 199106Russia institute for Geology and Mineral Resources of the World Ocean(VNIIOkeangeologia) St.Petersburg 190121Russia State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Sobolev institute of Geology and Mineralogy Siberian Branch of the Russian Academy of SciencesNovosibirsk 630090Russia

Over the past two decades, a significant number of discoveries of ancient zircon xenocrysts in ocean-floor magmatic rocks have been reported. These findings provide compelling evidence for the presence of ancient continental crust within young oceanic lithosphere. Almost all finds of ancient zircon xenocrysts within oceanic crust are from the Mid-Atlantic Ridge. For other localities, however, similar data are very limited. This report presents the first age determinations(U-Pb, SHRIMPII) and isotope-geochemical data(oxygen, trace and rare earth elements) for zircon xenocrysts from gabbro-diorites of the Shaka Ridge, in the vicinity of the Shaka fracture zone, near the western end of the Southwest Indian Ridge. The work is based on a study of bottom rock material dredged during expeditionary research on the R/V"Akademik Fedorov"(Russia) in 2016. The U-Pb isotope system of the zircon xenocrysts recorded a crystallization age of ~2.8 Ga at an upper discordia intercept and an age of ~600 Ma interpreted as the timing of a superimposed thermal event at a lower discordia *** zircon xenocrysts show geochemical signatures of magmatic origin, i.e., fractionated REE distribution spectra with an increase in chondrite-normalized values from light to heavy REE, positive Ce anomalies and negative Eu anomalies, and high Th/U ratios(0.59-7.77). In discrimination diagrams based on a series of inter-element relationships, zircon compositions fall into the fields of zircons from rocks of continental crust, mostly granitoids. The Li content of the zircons is high(1.8 ppm-50 ppm),adding further evidence to their derivation from rocks of continental crust. During their residence within young oceanic crust, the zircon xenocrysts experienced alterations under the influence of submarine high-temperature hydrothermal fluids, which selectively affected the distribution of trace elements in the zircons and reduced the δ;O values to 1.75‰-3.15‰. The presence of obviously older zircons

关键词： zircon U-Pb geochronology oxygen isotopes trace elements rare earth elements Shaka Ridge South Atlantic Southwest Indian Ridge

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Quantitative tracking of trans-synaptic nose-to-brain transport of nanoparticles and its modulation by odor,aging,and Parkinson’s disease

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Nano Research 2023年第5期16卷 7119-7133页

作者： Alexander V.Romashchenko Dmitrii V.Petrovskii Sergey Yu.Trotsky Ksenia N.Morozova Nina B.Illarionova Maria V.Zhukova Elena V.Kiseleva Marina B.Sharapova Daniil S.Zuev Konstantin E.Kuper Sergey Yu.Taskaev Anna I.Kasatova Dmitrii A.Kasatov Olga I.Solovieva Ivan A.Razumov Ludmila A.Gerlinskaya Mikhail P.Moshkin Yuri M.Moshkin The Federal Research Center institute of Cytology and Genetics SB RASAcademician Lavrentiev Avenue10Novosibirsk 630090Russia International tomography center Institutskaya st.3ANovosibirsk 630090Russia G.K.Boreskov institute of Catalysis SB RASAcademician Lavrentiev Avenue5Novosibirsk 630090Russia The Federal Research Center Budker institute of Nuclear Physics SB RASAcademician Lavrentiev Avenue11Novosibirsk 630090Russia institute of Computational Technologies Academician M.A.Lavrentiev avenue6Novosibirsk 630090Russia institute of Gene Biology Russian Academy of SciencesMoscow 117334Russia institute of Molecular and Cellular Biology SB RASAcad.Lavrentiev Ave8/2Novosibirsk 630090Russia Federal Research Centre of Biological Systems and Agrotechnologies RASst.January 929Orenburg 460000Russia

Nanoparticles(NPs)can be transported via the nose-to-brain(N_(2)B)***,quantitative data on their spatiotemporal dynamics and regulation of the N_(2)B transport are largely *** surveyed metal oxide/hydroxide NPs as magnetic resonance imaging(MRI)contrasts for quantitative N_(2)B *** containing divalent transition metals were the only ones capable of N_(2)B *** T1-weighted(T1W)MRI,we showed that Mn_(3)O_(4)-NPs were readily engulfed by olfactory receptor neurons(ORNs)without disrupting olfactory sensing,we mapped their N_(2)B *** neurons,the Mn_(3)O_(4)-NPs were localized to the cytosol,mitochondria,vesicles,moved at mixed fast and slow axonal transport velocities intraand extra-vesicularly through *** NPs’axonal transport is dependent on neuronal activity and microtubule *** Mn_(3)O_(4)-NPs were trans-synaptically transmitted through at least four synapses across the olfactory ***-synaptic transmission of the NPs was dependent on N-type Ca^(2+)channels and NMDA receptors but blocked by GABAB receptor activation.A five-parameter Weibull signal increase/decrease model fitted to the T1W MRI data allowed for estimating kinetic parameters of Mn_(3)O_(4)-NP accumulation/*** and relative accumulation rates,but not elimination,correlated negatively with the number of synapses from ORNs,indicating a coupling of the NPs’N_(2)B transport with spontaneous neuronal ***,olfactory stimuli(2,5-dimethylpyrazine and acetophenone)significantly modulated and rerouted the Mn_(3)O_(4)-NP N_(2)B transport odor ***,the NPs’trans-synaptic transmission was impaired by aging and the onset of Parkinson’s *** data suggest new approaches to diagnostics,functional neuroimaging,controlling N_(2)B drug delivery.

关键词： Mn_(3)O_(4)nanoparticles magnetic resonance imaging(MRI) nose-to-brain transport trans-synaptic transmission olfactory stimulation

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