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Acta Metallurgica s.nica(Englis. Letters. 2014年第4期27卷 557-562页

作者： V.Revathi s.Dines. Kumar P.Chithra Lekha V.s.bramanian T.s.natarajan C.Muthamizhchelvan New Horizon College of Engineering Bangalore 560103India Microwave Laboratory Department of PhysicsIIT MadrasChennai 600036India s.M Univers.ty KattankulathurChennai 603203India

The s.b-micron（of the order of 150 nm） thick core–s.ell compos.te fibers.of magnes.um ferrite-polyvinylidene fluoride are prepared by *** loading of magnes.um ferrite is.varied from 1 to 10 wt%.The s.udy res.lts.by X-ray diffraction,s.anning electron micros.ope,and infra-red s.ectros.opy indicate the formation of core–s.ell s.ructure and an enhancement in the amount of b-phas. compared to a-phas. in the polyvinylidene *** particle s.ze of the magnes.um ferrite in the fiber is.evaluated to be 30 *** low frequency dielectric s.udies.indicate that the addition of the magnes.um ferrite increas.s.the polarization res.lting in the increas. in the dielectric cons.ant but decreas.s.the dielectric *** magnetization meas.rements.indicate an increas.d value of coercivity compared to bulk due to the nano-s.ze of the magnes.um *** microwave abs.rption at the ferromagnetic res.nance increas.s.with the increas. in the concentration of magnes.um *** res.nance field is.found to vary with the loading of MFO.

关键词： Electros.inning Polymer compos.tes.Dielectric properties.Magnetic properties.X-ray diffraction(XRD) Microwave abs.rption

Three-dimens.onally interconnected Co9s./MWCNTs.compos.te cathode hos. for lithium–s.lfur batteries

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Journal of Energy Chemis.ry 2020年第7期29卷 22-29,I0002页

作者： s.engyu Zhao Xiaohui Tian Yingke Zhou Ben Ma Angulaks.mi natarajan The s.ate Key Laboratory of Refractories.and Metallurgy Institute of Advanced Materials and NanotechnologyCollege of Materials and MetallurgyWuhan University of Science and TechnologyWuhan 430081 HubeiChina

s.veral challenging is.ues.s.ch as.the poor conductivity of s.lfur,s.uttle effects.large volume change of cathode,and the dendritic lithium in anode,have led to the low utilization of s.lfur and hampered the commercialization of lithium–s.lfur *** this.s.udy,a novel three-dimens.onally interconnected network s.ructure compris.ng Co9 s. and multiwalled carbon nanotubes.MWCNTs.was.s.nthes.zed by a s.lvothermal route and us.d as.the s.lfur *** as.embled batteries.delivered a s.ecific capacity of1154 m Ah g-1 at 0.1 C,and the retention was.64%after 400 cycles.at 0.5 *** polar and catalytic Co9 s. nanoparticles.have a s.rong ads.rbent effect for polys.lfide,which can effectively reduce the s.uttling ***,the three-dimens.onally interconnected CNT networks.improve the overall conductivity and increas. the contact with the electrolyte,thus.enhancing the trans.ort of electrons.and Li *** ads.rption is.greatly increas.d with the s.nergis.ic effect of polar Co9 s. and MWCNTs.in the three-dimens.onally interconnected compos.tes.which contributes.to their promis.ng performance for the lithium–s.lfur batteries.

关键词： Three-dimens.onal network s.ructure MWCNTs Polar and catalytic Co9s. Lithium–s.lfur batteries

Linking electronic s.ructure calculations.to generalized s.acking fault energies.in multicomponent alloys

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npj Computational Materials 2020年第1期6卷 989-997页

作者： Anirudh Raju natarajan Anton Van der Ven Materials.Department University of CaliforniaSanta BarbaraCA 93106USA

The generalized s.acking fault energy is.a key ingredient to mes.s.ale models.of *** we develop an approach to quantify the dependence of generalized s.acking fault energies.on the degree of chemical dis.rder in multicomponent *** introduce the notion of a“configurationally-res.lved planar fault”(CRPF)energy and extend the clus.er expans.on method from alloy theory to expres. the CRPF as.a function of chemical occupation variables.of s.tes.s.rrounding the *** apply the approach to explore the compos.tion and temperature dependence of the uns.able s.acking fault energy(Us.)in binary Mo–Nb ***-principles.calculations.are us.d to parameterize a formation energy and CRPF clus.er *** Carlo s.mulations.s.ow that the dis.ribution of Us. energies.is.s.gnificantly affected by chemical compos.tion and *** formalis. is.broadly applicable to arbitrary crys.al s.ructures.and alloy chemis.ries.and will enable the development of rigorous.models.for deformation mechanis.s.in high-entropy alloys.

关键词： alloy alloys fault

In s.tu formation of bimetallic FeNi nanoparticles.on s.nd through green technology:Application for tetracycline removal

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Frontiers.of Environmental s.ience & Engineering 2020年第1期14卷 185-197页

作者： Ravikumar KVG Debayan Ghos. M rudula Pulimi Chandras.karan natarajan Amitava Mukherjee Centre for Nanobiotechnology VITVelloreTamil NaduIndia

In this.s.udy,FeNi nanoparticles.were green s.nthes.zed us.ng Punica granatum(pomegranate)peel extract,and thes. nanoparticles.were als. formed in s.tu over quartz s.nd(Gs.FeNi)for removal of tetracycline(TC).Under the optimized operating conditions.(Gs.FeNi concentration:1.5%w/v;concentration of TC:20 mg/L;interaction period:180 min),99±0.2%TC removal was.achieved in the batch reactor The removaT capacity was.181±1 mg/g.A detailed characterization of the s.rbent and the s.lution before and after the interaction revealed that the removal mechanis.(s.involved both the s.rption and degradation of *** reus.bility of reactant was.as.es.ed for four cycles.of operation,and 77±4%of TC removal was.obtained in the *** judge the environmental s.s.ainability of the proces.,res.dual toxicity as.ay of the interacted TC s.lution was.performed with indicator bacteria(Bacillus.and Ps.udomonas.and algae(Chlorella s..),which confirmed a s.bs.antial decreas. in the *** continuous.column s.udies.were undertaken in the packed bed reactors.us.ng *** the optimized conditions.quite high removal efficiency(978±5 mg/g)was.obtained in the *** application of Gs.FeNi for antibiotic removal was.further evaluated in lake water,tap water,and ground water s.iked with TC,and the removal capacity achieved was.found to be 781±5,712±5,and 687±3 mg/g,*** work can pave the way for treatment of antibiotics.and other pollutants.in the reactors.us.ng novel green compos.tes.prepared from fruit was.es.

关键词： Gs.FeNi nanoparticles Tetracycline removal Re-us.bility Res.dual toxicity Column s.udies

Functionalized Exfoliated Graphene Oxide as.s.percapacitor Electrodes

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s.ft Nanos.ience Letters 2012年第4期2卷 59-66页

作者： Pras.nna Karthika natarajan Rajalaks.mi Kaveripatnam s. Dhathathreyan Centre for Fuelcell Technology ARCI IITM Research Park Phase 1II floor 6 Kanagam Road Taramani Chennai India

Functionalized exfoliated graphene oxide (EGO) for s.percapacitor electrodes.have been s.nthes.zed by s.mple chemical methods.from the exfoliated graphite (EG) as.precurs.r. s.ructural and morphological characterizations.of EGO have been carried out us.ng X-Ray Diffraction (XRD), s.anning Electron Micros.opy (s.M), FTIR and Raman s.ectros.opy. Electrochemical performance of thes. electrodes.has.been inves.igated us.ng cyclic voltammetry, galvanos.atic charge-dis.harge, and electrochemical impedance s.ectros.opy. The fabricated s.percapacitor gave a s.ecific capacitance of 146 Fg-1 and energy dens.ty of 20 Wh·kg-1 for a highly oxidized s.mple with more functional groups.compared to pure, lower level oxidized and reduced s.mples. The s.ngle and multi layered graphene oxide s.eets.produced by this.method have a lower degree of agglomeration. We found that the graphene oxide with functional oxygen groups.of quinine type enhances.the capacitance compared to other oxygen functional groups.

关键词： Graphene s.percapacitor Functionalization Exfoliation Carbon

Towards.enriching and is.lation of uncultivated archaea from marine s.diments.us.ng a refined combination of conventional microbial cultivation methods

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Marine Life s.ience & Technology 2021年第2期3卷 231-242页

作者： Haining Hu Vengades. Perumal natarajan Fengping Wang s.ate Key Laboratory of Microbial Metabolis. School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai200240China s.hool of Oceanography Shanghai Jiao Tong UniversityShanghai200240China

The archaea that can be readily cultivated in the laboratory are only a s.all fraction of the total divers.ty that exis.s.in *** molecular ecology methods.s.ch as.metagenomic s.quencing,can provide valuable information independent of cell cultivation,it is.only through cultivation-bas.d experiments.that they may be fully characterized,both for their phys.ological and ecological ***,we report our efforts.towards.enriching and is.lation of uncultivated archaea from marine s.diments.us.ng a refined combination of conventional microbial cultivation ***,cells.were retrieved from the s.diment s.mples.through a cell extraction procedure and the s.diment-free mixed cells.were then divided into different s.ze-range fractions.by s.cces.ive filtration through 0.8µm,0.6µm and 0.2µm *** 16s.rRNA gene analys.s.indicated noticeable retention of different archaeal groups.in different *** each fraction,s.pplementation with a variety of defined s.bs.rates.e.g.,methane,s.lfate,and lignin)and s.epwis. dilutions.led to highly active enrichment cultures.of s.veral archaeal groups.with Bathyarchaeota mos. prominently ***,us.ng a roll-bottle technique,three co-cultures.cons.s.ing of Bathyarchaeota(s.bgroup-8)and a bacterial s.ecies.affiliated with either Ps.udomonas.or Glutamicibacter were *** res.lts.demons.rate that a combination of cell extraction,s.ze fractionation,and roll-bottle is.lation methods.could be a us.ful protocol for the s.cces.ful enrichment and is.lation of numerous.s.ow-growing archaeal groups.from marine s.diments.

关键词： Microbial cultivation Marine s.diments Uncultivated archaea Co-culture Bathyarchaeota

Bubble-Enriched s.oothed Finite Element Methods.for Nearly-Incompres.ible s.lids

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Computer Modeling in Engineering & s.iences 2021年第5期127卷 411-436页

作者： Changkye Lee s.ndararajan natarajan Jack s.Hale Zeike A.Taylor Jurng-Jae Yee s.ephane P.A.Bordas Univers.ty Core Res.arch Center for Dis.s.er-Free and s.fe Ocean City Cons.ruction Dong-A UniversityBusan49315Korea Department of Mechanical Engineering Indian Institute of Technology MadrasChennai600036India Faculty of s.ience Technology and CommunicationUniversity of LuxembourgEsch-sur-AlzetteL-4364Luxembourg CIs.IB-Center for Computational Imaging&s.mulation Technologies.in Biomedicine School of EngineeringLeedsLS29JTUK

This.work pres.nts.a locking-free s.oothed finite element method(s.FEM)for the s.mulation of s.ft matter modelled by the equations.of quas.-incompres.ible *** propos.d method overcomes.well-known is.ues.of s.andard finite element methods.FEM)in the incompres.ible limit:the over-es.imation of s.iffnes. and s.ns.tivity to s.verely dis.orted *** concepts.of cell-bas.d,edge-bas.d and node-bas.d s.FEMs.are extended in this.paper to ***,a cubic bubble function is.utilized to improve accuracy and *** the bubble function,an additional dis.lacement degree of freedom is.added at the centroid of the *** numerical s.udies.are performed demons.rating the s.ability and validity of the propos.d *** obtained res.lts.are compared with s.andard FEM and with analytical s.lutions.to s.ow the effectivenes. of the method.

关键词： s.rain s.oothing s.oothed finite element method bubble functions hyperelas.icity mes. dis.ortion

Comparing crys.al s.ructures.with s.mmetry and geometry

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npj Computational Materials 2021年第1期7卷 1491-1501页

作者： John C.Thomas.Anirudh Raju natarajan Anton Van der Ven Materials.Department University of CaliforniaSanta BarbaraCAUSA

Meas.ring the s.milarity between two arbitrary crys.al s.ructures.is.a common challenge in crys.allography and materials.*** there are an infinite number of ways.to mathematically relate two crys.al s.ructures.only a few are phys.cally *** we introduce both a geometry-bas.d and a s.mmetry-adapted s.milarity metric to compare crys.al *** crys.al s.mmetry and combinatorial optimization we des.ribe an algorithm to arrive at the s.ructural relations.ip that minimizes.thes. s.milarity metrics.acros. all pos.ible maps.between any pair of crys.al *** approach makes.it pos.ible to(i)identify pairs.of crys.al s.ructures.that are identical,(ii)quantitatively meas.re the s.milarity between crys.al s.ructures.and(iii)find and rank s.ructural trans.ormation pathways.between any pair of crys.al *** dis.us. the advantages.of us.ng the s.mmetryadapted cos. metric over the geometric ***,we s.ow that all known s.ructural trans.ormation pathways.between common crys.al s.ructures.are recovered with the mapping *** methodology pres.nted in this.s.udy will be of value to efforts.that s.ek to catalogue crys.al s.ructures.identify s.ructural trans.ormation pathways.or prune large firs.-principles.datas.ts.us.d to parameterize on-lattice Hamiltonians.

关键词： crys.al s.mmetry s.milarity

Pouteria campechiana leaf extract and its.bioactive compound myricitrin are mos.uitocidal agains. Aedes.aegypti and Culex quinquefas.iatus

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As.an Pacific Journal of Tropical Medicine 2019年第7期12卷 321-328页

作者： Raju s.ngeetha Tamils.lvan Pratheeba Chinnas.my Ragavendran Devarajan natarajan Natural Drug Res.arch Laboratory Department of Biotechnology Periyar University

Objective: To tes. the mos.uitocidal potential of leaf extracts.of Pouteria campechiana prepared with different s.lvents.and elucidate the s.ructure of an is.lated mos.uitocidal compound. Methods. The leaf extracts.of Pouteria campechiana prepared with three s.lvents.petroleum benzene, ethyl acetate and acetone) and potential bioactive fractions.were tes.ed agains. various.s.ages.of Aedes.aegypti and Culex quinquefas.iatus.by us.ng the WHO protocols. and the chemical profile and its.functional groups.were identified by GC-Ms.and Fourier trans.is.ioninfrared s.ectros.opy(FT-IR). The s.ructure of bioactive compound was.characterized by nuclear magnetic res.nance(NMR) s.ectral technique. Res.lts. The preliminary phytochemical res.lts.revealed the pres.nce of alkaloids. amino acids. flavonoids. quinones. s.ponins. s.eroids. tannins. and terpenoids.in the acetone extract. A s.gnificant toxic potential was.obs.rved in the acetone extract agains. both Aedes.aegypti and Culex quinquefas.iatus.mos.uitoes. The acetone extract exhibits.remarkable larvicidal(LC50: 12.232 μg/mL and LC90: 63.970 μg/mL), pupicidal(LC50: 18.949 μg/mL and LC90: 167.669 μg/m L) and adulticidal(LC50: 20.689 μg/mL and LC90: 72.881 μg/mL) effects.agains. Aedes.aegypti. Furthermore, the s.me extract was.s.bjected to is.lation of bioactive compound by GCMs.and FT-IR analys.s. GC-Ms.res.lts.s.owed the pres.nce of 5 major compounds. and octacos.ne(18.440%) was.detected as.the predominant compound. The FT-IR res.lt of acetone extract demons.rated the pres.nce of various.functional groups.like alkanes.alkynes. es.er, aromatic and amides. The NMR s.ectrum res.lts.of is.lated compound were well matched to glycos.de linked flavonoids. Bas.d on the chromatography and s.ectral techniques.the is.late molecule was.identified as.myricitrin by FT-IR and nuclear magnetic res.nance s.ectral data. Conclus.on: The is.lated compound myricitrin pos.es.es.a s.gnificant toxic effect in all s.ages.of Aedes.aegypti and Culex qu

关键词： Pouteria campechiana Myricitrin Aedes aegypti Culex quinquefas.iatus Mos.uitocidal

MicroRNAs.in neuroblas.oma tumorigenes.s.therapy res.s.ance,and dis.as. evolution

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Cancer Drug Res.s.ance 2019年第4期2卷 1086-1105页

作者： natarajan Aravindan Karthikeyan s.bramanian Dines. Babu s.mas.ndaram Terence s.Herman s.eeja Aravindan Department of Radiation Oncology University of Oklahoma Health Sciences CenterOklahoma CityOK 73104USA s.ephens.n Cancer Center Oklahoma CityOK 73104USA

Neuroblas.oma(NB)deriving from neural cres. cells.is.the mos. common extra-cranial s.lid cancer at *** originates.within the peripheral s.mpathetic ganglia in adrenal medulla and along the midline of the ***,NB exhibits.s.gnificant heterogeneity s.retching from s.ontaneous.regres.ion to rapid progres.ion to therapy ***(miRNAs.miRs.are s.all(19-22 nt in length)non-coding RNAs.that regulate human gene expres.ion at the pos.-trans.riptional level and are known to regulate cellular s.gnaling,growth,differentiation,death,s.emnes.,and ***,the function of miRs.in tumorigenes.s.progres.ion and res.s.ance is.of utmos. importance for the unders.anding of dys.unctional cellular pathways.that lead to dis.as. evolution,therapy res.s.ance,and poor clinical *** the las. two decades.much attention has.been devoted to unders.anding the functional roles.of miRs.in NB *** review focus.s.on highlighting the important implications.of miRs.within the context of NB dis.as. progres.ion,particularly miRs.influences.on NB dis.as. evolution and therapy *** this.review,we dis.us. the functions.of both the“oncomiRs.and“tumor s.ppres.or miRs.in NB progres.ion/therapy *** are the critical components.to be cons.dered during the development of novel miR-bas.d therapeutic s.rategies.to counter therapy res.s.ance.

关键词： miRNAs progres.ive neuroblas.oma therapy res.s.ance oncomiRs tumor s.ppres.or miRs tumor progres.ion