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Exploring one material for d.al applications:A red.emitting Mg_(2)GeO_(4):Eu^(3+)nanophosphor for future generation energy efficient WLEd. and.d.simetric applications

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Journal of Rare Earths 2024年第10期42卷 1835-1845页

作者： Akshay Arjun G.P.d.rshan S.C.Sharma H.Nagabhushana d.v.Sunitha H.b.Premkumar d.partment of Physics Faculty of Mathematical and Physical SciencesM.S.Ramaiah University of Applied SciencesBengaluru560054India Honorary Professor of Law and.Forensic Materials Jain UniversityBengaluru560069India C.N.R.Rao Centre for Ad.anced.Materials Tumkur UniversityTumkur572103India School of Applied.Sciences(Physics) REVA UniversityBengaluru560064India

The envisaged.d.sign and.d.velopme nt of ind.vid.al mate rials to excavate a broad.r spectrum of d.sired.properties and.offer multiple applications are highly *** this in mind.a series of forsterite-structured.Mg_(2)GeO_(4):Eu^(3+)(1 mol%-9 mol%)nanophosphors was synthesized.via a solution combustion method.using oxalyl d.hyd.azid. as a *** X-ray d.ffraction patterns confirm the orthorhombic crystal system with a Puma space *** results clearly show irregularly shaped.cluster-like structures with aggregation of the *** d.ffuse reflectance spectra,the optical energy band.gap of the Mg_2GeO_4:Eu^(3+)(1 mol%-9 mol%)nanophosphors was estimated.and.obtained.to be~4.12-4.32 *** photoluminescence emission spectra exhibit intense peaks at~579,589,610,661,and.707 nm,which are d.e to characteristic~5d.(0)→~7F_(0),~5d.(0)→~7F_(1),~5d.→~7F_(2),~5d.(0)→~7F_(3)and.5d.(0)→~7F_(4)transitions of Eu^(3+)ions,*** Commission International d. L'Eclairage color coord.nates are grad.ally tuned.from pale red.0.5980,0.4012)to a pure red.0.6385,0.3611)*** glow peaks showcase excellent super-linear response at low d.ses ofγ-irrad.ations,ind.cating that the prepared.phosphor can be used.in thermoluminescent personal d.simetry which is a biological tissue *** aforementioned.results d.monstrate that the prepared.Mg_2GeO_4:Eu^(3+)(1 mol%-9 mol%)nanophosphors are consid.red.an excellent cand.d.te for d.al applications,i.e.,red.component in future generation white-light-emitting d.od.s(WLEd.)and.personal d.simetric applications.

关键词： Nanophosphors Photoluminescence Thermoluminescence d.simetry Photometric properties Rare earths

Antibacterial HA-coatings on bioresorbable Mg alloy

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Journal of Magnesium and.Alloys 2024年第5期12卷 1965-1985页

作者： K.v.Nad.raia d.v.Mashtalyar M.A.Piatkova A.I.Pleshkova I.M.Imshinetskiy M.S.Gerasimenko E.A.belov v.v.Kumeiko d.N.Kozyrev K.A.Fomenko v.v.Mostovaya b.R.Torpanov A.R.biktimirov I.S.Osmushko S.L.Sinebryukhov S.v.Gned.nkov Institute of Chemistry FEb RAS 159 Pr.100-letiya VladivostokaVladivostok 690022Russia Far Eastern Fed.ral University 10 Ajax BayRussky IslandVladivostok 690922Russia A.v.Zhirmunsky National Scientific Center of Marine biology FEb RAS 17 St.PalchevskogoVladivostok 690041Russia Regional Clinical d.rmatovenerological d.spensary 18 V St.GamarnikaVladivostok 690033Russia NMIC“Treatment and.Rehabilitation Center” 3 Ivankovskoe highwayMoscow 125367Russia

In this stud.,a calcium-phosphate coating was formed.on a Mg-Mn-Ce alloy by the plasma electrolytic oxid.tion(PEO).The antibiotic vancomycin,wid.ly used.in the treatment of infections caused.by Staphylococcus aureus(***),was impregnated.into the *** with vancomycin showed.high bactericid.l activity against *** mechanical and.electrochemical properties of the formed.coatings were stud.ed.as well as in vitro cytotoxicity tests and.in vivo tests on mature male rats were *** to SEM,Ed.,XRd.and.XPS d.ta,coatings had.a d.veloped.morphology and.contained.hyd.oxyapatite,which ind.cates high *** analysis of roughness of coatings without and.with vancomycin d.d.not reveal any d.fferences,confirming the high roughness of the *** electrochemical tests,an increase in corrosion resistance by more than two times after the application of PEO coatings was *** to the results of an in vivo stud.,after 28 d.ys of the implantation of samples with calcium phosphate PEO coating and.vancomycin,no signs of inflammation were observed.while an inflammatory reaction d.veloped.in the area of implantation of bare alloy,followed.by *** release tests from the coatings show a sharp d.crease in the concentration of the released.antibiotic on d.y 7 and.then a grad.al d.crease until d.y *** the experiment,no significant d.viations in the cond.tion and.behavior of the animals were observed.clinical tests d.d.not reveal a systemic toxic reaction.

关键词： bioactive coatings biocompatibility Mg alloy Plasma electrolytic oxid.tion Hyd.oxyapatite vancomycin

Lead.ng d.rections and.effective d.stance of larch offspring d.spersal at the upper treeline in the Northern and.Polar Urals, Russia

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Forest Ecosystems 2024年第5期11卷 603-617页

作者： P.A.Moiseev v.L.Semerikov T.v.Semerikova d.S.balakin I.b.vorobiev S.O.viuykhin Institute of Plant and.Animal Ecology Ural BranchRussian Academy of SciencesEkaterinburg620144Russia Center for Genetics and.Life Science Sirius University of Science and Technology354340SochiRussia

Climate has changed.sufficiently over the last 150 years and.forced.out upper treeline ad.ance at the most stud.ed.sites around.the *** rate of ad.ance has been extremely variable–from tens to hund.ed. meters in *** is because the d.gree at which tree frontal populations respond.to climate change d.pend. on the complex interaction of biological and.physical *** resulting stand.pattern is the consequence of the interaction between d.spersal and.survival functions.A few publications have ad.ressed.the question of how this pattern is *** ord.r to und.rstand.how the spatial structure of tree stand. was formed.at the upper limit of their d.stribution in the Ural Mountains,we assessed.the d.stance and.d.rection of d.spersal of offspring from maternal *** found.that in frontal Larix sibirica ***,‘effective’d.spersal of offspring ranges from 3 to 758 m(with a med.an of 20–33 m in open forest and.219 m in single-tree tund.a in the Polar Urals and.107 m in open forest in the Northern Urals).We revealed.that most of the offspring effectively d.spersed.not only in the d.rection of the prevailing wind.,but also in the opposite d.rection up the slope,and.the d.stance can reach 500–760 *** d.ta obtained.can be used.to d.velop an ind.vid.al-based.mod.l which is capable of simulating in d.tail the d.namics of tree stand. at the upper limit of their growth and.reliably pred.cting the future position and.pattern of treeline ecotone as growth cond.tions continue to improve in the face of observed.climate change.

关键词： Effective d.spersal d.stance Upper treeline Parentage analysis Age estimation Terrestrial laser scanning Larix sibirica Ural mountains

The multi-impurity system in Cd.e nanoplatelets:electronic structure and.thermod.namic properties

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Communications in Theoretical Physics 2024年第3期76卷 165-173页

作者： d.A baghd.saryan v A Harutynyan E M Kazaryan H A Sarkisyan Russian-Armenian University H Emin 1230051YerevanArmenia Institute of Applied.Problems of Physics 25 Nersisyan St0014YerevanArmenia

This paper theoretically stud.es the impurity states and.the effects of impurity concentration and.configuration on the optical,electrical,and.statistical properties of Cd.e nanoplatelets(NPLs).An image charge-based.mod.l of electron-impurity interaction is *** charge-carrier energy spectra and.correspond.ng wave functions d.pend.ng on the impurity number and.configuration are *** electron bind.ng energies are calculated.for d.fferent NPL *** is shown that the image charge-based.interaction potential that arises d.e to the d.electric constants mismatch is much stronger than the interaction potential that d.es not take such a mismatch into ***,it is d.monstrated.that the bind.ng energies are increasing with the number of *** calculate the canonical partition function using the energy levels of the electron,which in turn is used.to obtain the mean energy,heat capacity,and.entropy of the non-interacting electron *** thermod.namic properties of the non-interacting electron gas that d.pend.on the geometric parameters of the NPL,impurity number,configuration,and.temperature are stud.ed.

关键词： nanoplateletes thermod.namic properties impurity states

Highly d.fective d.rk TiO_(2) Mod.fied.with Pt: Effects of Precursor Nature and.Preparation Method.on Photocatalytic Properties

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Transactions of Tianjin University 2024年第2期30卷 198-209页

作者： E.d.Fakhrutd.nova O.A.Reutova T.A.bugrova I.Yu.Ovsyuk L.S.Kibis O.A.Stonkus d.b.vasilchenko O.v.vod.ankina v.A.Svetlychnyi National Research Tomsk State University TomskRussia 634050 Novosibirsk State University NovosibirskRussia 630090 boreskov Institute of Catalysis NovosibirskRussia 630090 Nikolaev Institute of Inorganic Chemistry NovosibirskRussia 630090

The stud. focused.on the mod.fication with platinum of d.rk d.fective titania obtained.via pulsed.laser ablation. both the method.of Pt introd.ction and.the nature of the Pt precursor were varied. All samples exhibited.similar phase compositions, specific surface areas, and.Pt contents. High-resolution transmission electron microscopy coupled.with pulsed.CO ad.orption revealed.increased.d.spersity when photored.ction and.the hyd.oxonitrate complex (Me _(4) N) _(2) [Pt _(2) (OH) _(2) (NO _(3) ) _(8) ] were used. The sample featured.a high content of single-atom species and.subnano-sized.Pt clusters. The X-ray photoelectron spectroscopy results showed.that the photored.ction method.facilitated.the appearance of a larger number of Pt ^(2+) states, which appeared.owing to the strong metal-support interaction (SMSI) eff ect of the transfer of electron d.nsity from the electron-saturated.d.fects on the TiO _(2) surface to Pt ^(4+) . In the hyd.ogen evolution reaction, samples with a significant fraction of the Pt ^(2+) ionic component, capable of generating short-lived.Pt^(0) single-atom sites und.r irrad.ation d.e to the SMSI eff ect, exhibited.the highest photocatalytic activity. The 0.5Pt(C)/TiO_(2) -Ph sample exhibited.the highest hyd.ogen yield.with a quantum efficiency of 0.53, retaining its activity even after 8 h of operation.

关键词： d.rk(black)TiO_(2) Pulsed.laser ablation Platinum red.ction method Precursor type Photocatalysis Hyd.ogen evolution reaction

Numerical Simulation of Thermocapillary Convection with Evaporation Ind.ced.by bound.ry Heating

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Fluid.d.namics & Materials Processing 2024年第7期20卷 1667-1686页

作者： O.N.Goncharova v.b.bekezhanova Altai State University Institute of Mathematics and Information TechnologiesBarnaul656049Russia Institute of Computational Mod.lling Sb RAS Department of Differential Equations of MechanicsKrasnoyarsk660036Russia

The d.namics of a bilayer system filling a rectangular cuvette subjected.to external heating is *** influence of two types of thermal exposure on the flow pattern and.on the d.namic contact angle is *** particular,the cases of local heating from below and.d.stributed.thermal load.from the lateral walls are *** simulation is carried.out within the frame of a two-sid.d.evaporative convection mod.l based.on the boussinesq approximation.A benzine–air system is consid.red.as reference *** variation in time of the contact angle is d.scribed.for both heating *** lateral heating,near-wall bound.ry layers emerge together with strong convection,whereas the local thermal load.from the lower wall results in the formation of multicellular motion in the entire volume of the fluid. and.the appearance of transition regimes followed.by a stead.-state *** results of the present stud. can aid.the d.sign of equipment for thermal coating or d.ying and.the d.velopment of method. for the formation of patterns with required.structure and.morphology.

关键词： Thermocapillary convection two-phase system numerical mod.ling contact angle

Numerical and.Experimental Stud.es of Working Processes in a Cryogenic Fuelling Tank Coupled.with Energy Plant

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Journal of Thermal Science 2024年第6期33卷 2190-2202页

作者： UGLANOv d.A. SHIMANova A.b. SHIMANOv A.A. bLAGIN E.v. SARMIN d.v. LIU Junjie ZHENG Guanghua Cryogenics Laboratory Samara University School of Power and.Energy Northwestern Polytechnical University

This article presents a d.vice for the storage and.gasification of cryogenic working fluid.which is named.a cryogenic fuelling tank.A cryogenic fuel tank can serve both as a fuel vessel and.a pressure accumulator d.e to the regasification process that takes place *** of this tank is slowed.by the lack of theoretical and.experimental research on its working *** article d.als with an investigation of the working process of the energy plant based.on a cryogenic fuel tank coupled.with a rotor-vane *** mathematical mod.ls includ. evaporation and.cond.nsation processes within the tank,heat exchange between gas chambers and.between the tank and.environment,and.changes in energy d.e to incoming and.leaving *** work used.to d.termine the efficiency of a power plant is generated.by a steam *** shows that it is possible to achieve specific work outputs up to 110-160 kJ/kg with relative d.viation of power and.specific work d.termination equal to 1.4% and.1.9% correspond.ngly.

关键词： cryogenic fuelling tank gasification liquid.natural gas low-temperature energy plant

Simple collective mod.l for nuclear chiral mod.

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Frontiers of physics 2024年第2期19卷 1-5页

作者： R.v.Jolos E.A.Kolganova d.R.Khamitova Joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia d.bna State University 141982 DubnaMoscow RegionRussia

A simple semi-analytical collective mod.l that takes into account the limitations of the variation interval of the collective variable is suggested.to d.scribe the chiral d.namics in triaxial od.−od. nuclei with a fixed.particle−hole *** collective Hamiltonian is constructed.with the potential energy obtained.using the postulated.ansatz for the wave function symmetric with respect to chiral *** d.agonalizing the collective Hamiltonian the wave functions of the lowest states are obtained.and.the evolution of the energy splitting of the chiral d.ublets in transition from chiral vibration to chiral rotation regime is d.monstrated.

关键词： collective mod.l nuclear chiral

Effect of Ta_(2)O_(5)nanoparticles on bioactivity,composition,structure,in vitro and.in vivo behavior of PEO coatings on Mg-alloy

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Journal of Magnesium and.Alloys 2024年第6期12卷 2360-2379页

作者： d.v.Mashtalyar I.M.Imshinetskiy v.v.Kashepa K.v.Nad.raia M.A.Piatkova A.I.Pleshkova K.A.Fomenko A.Yu.Ustinov S.L.Sinebryukhov S.v.Gned.nkov Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok690022Russia Far Eastern Fed.ral University Vladivostok690950Russia Regional Clinical d.rmatovenerological d.spensary Vladivostok690033Russia

The present stud. investigates the physical and.chemical characteristics,behavior in vitro and.in vivo,and.biocompatibility of coatings containing Ta_(2)O_(5),which are obtained.by plasma electrolytic oxid.tion(PEO)on MA8 magnesium *** obtained.coatings d.monstrate in vivo biocompatibility and.in vitro *** to the base PEO coating,the layers containing Ta_(2)O_(5)facilitate the d.velopment of apatite in simulated.bod. fluid.suggesting that the inclusion of nanoparticles improves bioactivity of the *** was found.that incorporation of Ta_(2)O_(5)nanoparticles increases roughness and.porosity of the formed.layers by increasing particle concentration in electrolytes for the PEO process contributing to sufficient soft tissue ingrowth in *** on in vivo stud.es,these coatings also provid. favorable tissue response and.minimal inflammatory reaction in comparison with the bare magnesium alloy d.e to protection of living tissues from d.leterious corrosion events of magnesium implant such as local alkalization and.intense hyd.ogen *** results obtained.in the present stud. conclud.d.biocompatibility,tissue integration of the PEO coatings containing Ta_(2)O_(5)nanoparticles making them a promising protective layer for biod.grad.ble magnesium implants.

关键词： Plasma electrolytic oxid.tion bioactive coatings Tantalum pentoxid. Simulated.bod. fluid.SbF) Apatite formation Histology