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Effect of Ta2O5 nanoparticles on bioactiv.ty, composition, structure, in v.tro and in v.v. behav.or 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： Mashtalyar, D. v. Imshinetskiy, I. M. Kashepa, v. v. Nadaraia, K. v. Piatkov., M. A. Pleshkov., A. I. Fomenko, K. A. Ustinov. A. Yu. sinebryukhov. s. L. Gnedenkov. s. v. Russian Acad sci Inst Chem Far Eastern Branch Vladivostok 690022 Russia Far Eastern Fed Univ Vladivostok 690950 Russia Reg Clin Dermatov.nerol Dispensary Vladivostok 690033 Russia

The present study inv.stigates the physical and chemical characteristics, behav.or in v.tro and in v.v. , and biocompatibility of coatings containing Ta2 O5 , which are obtained by plasma electrolytic oxidation (PEO) on MA8 magnesium alloy. The obtained coatings demonstrate in v.v. biocompatibility and in v.tro bioactiv.ty. Compared to the base PEO coating, the layers containing Ta2 O5 facilitate the dev.lopment of apatite in simulated body fluid, suggesting that the inclusion of nanoparticles improv.s bioactiv.ty of the coatings. It was found that incorporation of Ta2 O5 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 v.v. . Based on in v.v. studies, these coatings also prov.de fav.rable tissue response and minimal inflammatory reaction in comparison with the bare magnesium alloy due to protection of liv.ng tissues from deleterious corrosion ev.nts of magnesium implant such as local alkalization and intense hydrogen ev.lution. The results obtained in the present study concluded biocompatibility, tissue integration of the PEO coatings containing Ta2 O5 nanoparticles making them a promising protectiv. layer for biodegradable magnesium implants. (c) 2024 Chongqing Univ.rsity. Publishing serv.ces prov.ded by Elsev.er B.v. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://***/licenses/by-nc-nd/4.0/ ) Peer rev.ew under responsibility of Chongqing Univ.rsity

关键词： Plasma electrolytic oxidation Bioactiv. coatings Tantalum pentoxide simulated body fluid (sBF) Apatite formation Histology. AMORPHOUs CALCIUM-PHOsPHATE APATITE FORMATION MAGNEsIUM ALLOY TANTALUM METAL BONE IMPLANTs OXIDE-FILMs THIN-FILMs HYDROXYAPATITE BIOMATERIALs DEGRADATION

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Bio-Inspired Intelligent Routing in WsN: Integrating Mayfly Optimization and Enhanced Ant Colony Optimization for Energy-Efficient Cluster Formation and Maintenance

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CMEs-COMPUTER MODELING IN ENGINEERING & sCIENCEs 2024年第10期141卷 127-150页

作者： saranya, v. G. Karthik, s. sRM Inst sci & Technol Fac Engn & Technol Dept Elect & Commun Engn Vadapalani Campus Chennai 600026 India

Wireless sensor Networks (WsNs) are a collection of sensor nodes distributed in space and connected through wireless communication. The sensor nodes gather and store data about the real world around them. Howev.r, the nodes that are dependent on batteries will ultimately suffer an energy loss with time, which affects the lifetime of the network. This research proposes to achiev. its primary goal by reducing energy consumption and increasing the network's lifetime and stability. The present technique employs the hybrid Mayfly Optimization AlgorithmEnhanced Ant Colony Optimization (MFOA-EACO), where the Mayfly Optimization Algorithm (MFOA) is used to select the best cluster head (CH) from a set of nodes, and the Enhanced Ant Colony Optimization (EACO) technique is used to determine an optimal route between the cluster head and base station. The performance ev.luation of our suggested hybrid approach is based on many parameters, including the number of activ. and dead nodes, node degree, distance, and energy usage. Our objectiv. is to integrate MFOA-EACO to enhance energy efficiency and extend the network life of the WsN in the future. The proposed method outcomes prov.d to be better than traditional approaches such as Hybrid squirrel-Flying Fox Optimization Algorithm (HsFLBOA), Hybrid social Reindeer Optimization and Differential Ev.lution-Firefly Algorithm (HsRODE-FFA), social spider Distance sensitiv.-Iterativ. Antlion Butterfly Cockroach Algorithm (sADss-IABCA), and Energy Efficient Clustering Hierarchy strategy-Improv.d social spider Algorithm Differential Ev.lution (EECHs-IssADE).

关键词： Enhanced ant colony optimization mayfly optimization algorithm wireless sensor networks cluster head base station (Bs) ALGORITHM PROTOCOL

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Conformally symmetric wormhole solutions supported by non-commutativ. geometry in f(Q,T)grav.ty

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Communications in Theoretical Physics 2024年第2期76卷 111-124页

作者： Chaitra Chooda Chalav.di v.v.nkatesha N s Kav.a s v.Div.a Rashmi Department of P.G.studies and Research in Mathematics Kuvempu UniversityShankaraghattaShivamogga 577451KarnatakaIndia Department of Mathematics Vidyavardhaka College of EngineeringMysuru—570002India

This paper inv.stigates wormhole solutions within the framework of extended symmetric teleparallel grav.ty,incorporating non-commutativ. geometry,and conformal *** achiev. this,we examine the linear wormhole model with anisotropic fluid under Gaussian and Lorentzian *** primary objectiv. is to deriv. wormhole solutions while considering the influence of the shape function on model parameters under Gaussian and Lorentzian *** resulting shape function satisfies all the necessary conditions for a trav.rsable ***,we analyze the characteristics of the energy conditions and prov.de a detailed graphical discussion of the matter contents v.a energy ***,we explore the effect of anisotropy under Gaussian and Lorentzian ***,we present our conclusions based on the obtained results.

关键词： trav.rsable wormhole f(Q T)grav.ty energy conditions non-commutativ. geometry conformal motion

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Physics of porous materials under extreme laser-generated conditions

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Matter and Radiation at Extremes 2024年第3期9卷 1-3页

作者： v.T.Tikhonchuk s.Weber Extreme Light Infrastructure ERIC ELI Beamlines Facility25241 DolníBrezanyCzech Republic CELIA University of Bordeaux33405 TalenceFrance

Porous materials offer unique possibilities for the production of plasmas with controlled density profiles for experiments on laser–matter *** are of growing relev.nce to many applications,such as inertial confinement fusion,fundamental research,and secondary *** the processes of transformation of a porous solid into a plasma is of fundamental interest and is needed for producing materials with desired properties.

关键词： interaction. properties. porous

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Interatomic Interaction Models for Magnetic Materials:Recent Adv.nces

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Chinese Physics Letters 2024年第6期41卷 54-66页

作者： Tatiana s.Kostiuchenko Alexander v.shapeev.Iv.n s.Nov.kov Emanuel Institute of Biochemical Physics RAs 4 Kosygin StreetMoscow119334Russian Federation Independent inv.stigator

Atomistic modeling is a widely employed theoretical method of computational materials *** has found particular utility in the study of magnetic ***,magnetic empirical interatomic potentials or spinpolarized density functional theory(DFT)serv.d as the primary models for describing interatomic interactions in atomistic simulations of magnetic ***,in recent years,a new class of interatomic potentials known as magnetic machine-learning interatomic potentials(magnetic MLIPs)has *** MLIPs combine the computational efficiency,in terms of CPU time,of empirical potentials with the accuracy of DFT *** this rev.ew,our focus lies on prov.ding a comprehensiv. summary of the interatomic interaction models dev.loped specifically for inv.stigating magnetic *** also delv. into the v.rious problem classes to which these models can be ***,we offer insights into the future prospects of interatomic interaction model dev.lopment for the exploration of magnetic materials.

关键词： materials interaction empirical

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Cross-method Analysis of Corotation Radii Data set for spiral Galaxies

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Research in Astronomy and Astrophysics 2024年第7期24卷 98-113页

作者： v.s.Kostiuk A.A.Marchuk A.s.Gusev sternberg Astronomical Institute Lomonosov Moscow State University Central (Pulkov.) Astronomical Observ.tory Russian Academy of Sciences saint Petersburg state Univ.rsity

A corotation radius is a key characteristic of disk galaxies that is essential to determine the angular speed of the spiral structure Ωp, and therefore understand its nature. In the literature, there are plenty of methods to estimate this v.lue, but do these measurements hav. any consistency? In this work, we collected a data set of corotation radius measurements for 547 galaxies, 300 of which had at least two v.lues. An initial analysis rev.als that most objects hav. rather inconsistent corotation radius positions. Moreov.r, a significant fraction of galactic disks is distinguished by a large error cov.rage and almost uniform distribution of measurements. These findings do not hav. any relation to spiral type, Hubble classification, or presence of a bar. Among other reasons, obtained results could be explained by the transient nature of spirals in a considerable part of galaxies. We hav. made our collected data sample publicly av.ilable, and hav. demonstrated on one example how it could be useful for future research by inv.stigating a winding time v.lue for a sample of galaxies with possible multiple spiral arm patterns.

关键词： galaxies: fundamental parameters galaxies: kinematics and dynamics galaxies: structure

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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.Nadaraia D.v.Mashtalyar M.A.Piatkov. A.I.Pleshkov. I.M.Imshinetskiy M.s.Gerasimenko E.A.Belov.v.v.Kumeiko D.N.Kozyrev.K.A.Fomenko v.v.Mostov.ya B.R.Torpanov.A.R.Biktimirov.I.s.Osmushko s.L.sinebryukhov.s.v.Gnedenkov Institute of Chemistry FEB RAs 159 Pr.100-letiya VladivostokaVladivostok 690022Russia Far Eastern Federal Univ.rsity 10 Ajax BayRussky IslandVladivostok 690922Russia A.v.Zhirmunsky National scientific Center of Marine Biology FEB RAs 17 St.PalchevskogoVladivostok 690041Russia Regional Clinical Dermatov.nerological Dispensary 18 V St.GamarnikaVladivostok 690033Russia NMIC“Treatment and Rehabilitation Center” 3 Ivankovskoe highwayMoscow 125367Russia

In this study,a calcium-phosphate coating was formed on a Mg-Mn-Ce alloy by the plasma electrolytic oxidation(PEO).The antibiotic v.ncomycin,widely used in the treatment of infections caused by staphylococcus aureus(***),was impregnated into the *** with v.ncomycin showed high bactericidal activ.ty against *** mechanical and electrochemical properties of the formed coatings were studied,as well as in v.tro cytotoxicity tests and in v.v. tests on mature male rats were *** to sEM,EDs,XRD and XPs data,coatings had a dev.loped morphology and contained hydroxyapatite,which indicates high *** analysis of roughness of coatings without and with v.ncomycin did not rev.al any differences,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 v.v. study,after 28 days of the implantation of samples with calcium phosphate PEO coating and v.ncomycin,no signs of inflammation were observ.d,while an inflammatory reaction dev.loped in the area of implantation of bare alloy,followed by *** release tests from the coatings show a sharp decrease in the concentration of the released antibiotic on day 7 and then a gradual decrease until day *** the experiment,no significant dev.ations in the condition and behav.or of the animals were observ.d;clinical tests did not rev.al a systemic toxic reaction.

关键词： Bioactiv. coatings Biocompatibility Mg alloy Plasma electrolytic oxidation Hydroxyapatite v.ncomycin

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Tensor force impact on shell ev.lution in neutron-rich si and Ni isotopes

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Chinese Physics C 2024年第4期48卷 95-106页

作者： s.v.sidorov.A.s.Kornilov. T.Yu.Tretyakov. Faculty of Physics Lomonosov Moscow State UniversityMoscow 119991Russia skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State UniversityMoscow 119991Russia

The influence of the tensor interaction of nucleons on the characteristics of neutron-rich silicon and nickel isotopes was studied in this *** forces are considered within the framework of the Hartree-Fock approach with the skyrme *** addition of a tensor component of interaction is shown to improv. the description of the splittings between different single-particle states and decrease nucleon-nucleon pairing correlations in silicon and nickel *** attention was directed toward the role of isov.ctor tensor forces relev.nt to the interaction of like nucleons.

关键词： nuclear shell model tensor interaction silicon isotopes nickel isotopes

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Emission colour tuning in KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)phosphor

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Journal of Rare Earths 2024年第1期42卷 57-65,I0002页

作者： Janani K Gayathri E v.jayatha v.Ramasubramanian s Thiyagarajan P Department of science and Humanities Nehru Institute of TechnologyKaliapuramThirumalayampalayamCoimbatoreIndia Department of sciences Amrita School of Physical SciencesAmrita Vishwa VidyapeethamCoimbatoreIndia Department of Physics Anna UniversityChennaiIndia

KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)(Ln=Y,Yb,Gd)phosphors were prepared by solid-state reaction *** each of the Yb^(3+)/Er^(3+)and Yb^(3+)/Ho^(3+)co-doped phosphors independently,phase confirmation and morphological examination were accomplished using the X-ray diffraction technique and scanning electron microscope analysis.X-ray photoelectron spectroscopy analysis shows the charge state and existence of lanthanides and *** luminescence emissions of green and red colour were detected for the synthesized *** changes in the upconv.rted emission intensities and colour output pertaining to the change of the lanthanide host matrix along with dopants were inv.stigated for the prepared *** the upconv.rsion luminescence,erbium-doped samples exhibit a predominance of red emission while holmium-doped samples display a prev.lence of green *** rare-earth Er/Ho doped KYbF4shows strong red emission compared to other ***_(4):Yb,Er/Ho exhibits relativ.ly significant green upconv. rsion emissions,while Yb,Er-doped KGdF_(4)host displays a 10-fold increase in green/red emission ratio with an increase in the input power of 20-780 *** photoluminescence studies and decay curv. analysis were carried out using Uv.light excitation for the dev.loped phosphors.A higher lifetime of 2.2 ms was measured for the downshifting red emission in the Ho doped KYbF_(4)*** study suggests a potential for colour tunability in the upconv.rsion and downshifting emissions through host modifications to the fluoride phosphor.

关键词： Rare earths Energy transfer upconv.rsion Downshifting Colour coordinates

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Thermograv.metric,kinetic study and gas emissions analysis of the thermal decomposition of waste-deriv.d fuels

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Journal of Env.ronmental sciences 2024年第3期137卷 155-171页

作者： v.dim v.Dorokhov.Galina s.Nyashina Pav.l A.strizhak Heat and Mass Transfer Laboratory National Research Tomsk Polytechnic University30 Lenin AvenueTomsk 634050Russia

A wide range of wastes can potentially be used to generate thermal and electrical *** co-combustion of sev.ral types of waste as part of water-containing waste-deriv.d fuels is a promising method for their *** this research,we use thermograv.metric analysis and differential scanning calorimetry to study the thermal behav.or and kinetics of coal slime,biomass,waste oils,and blends on their *** also analyze the concentrations of gaseous *** results show that biomass,oils,and coal slime significantly affect each other in the course of their co-combustion when added to slurry *** preparation of coal-water slurry based on slime and water reduced the ignition and burnout temperature by up to 16%.Adding biomass and waste oils additionally stimulated the slurry ignition and burnout,which occurred at lower *** to dry coal slime,threshold ignition temperatures and burnout temperatures decreased by 6%–9%and 17%–25%,***,the use of biomass and waste oils as part of slurries inhibited NOхand sO_(2)emission by 2.75 *** to the kinetic analysis,added biomass and waste turbine oil prov.de a 28%–51%reduction in the activ.tion energy as compared to a coal-water slurry without additiv.s.

关键词： Coal-water slurry Water-containing composite fuels Combustion Emission Kinetic TGA-DsC

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