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Adsorption of.yttrium(Y^(3+)) and c.nc.ntration of.rare earth elements f.om phosphogypsum using c.itin and c.itin aerogel

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Journal of.Rare Earths 2024年第4期42卷 775-782页

作者： Glaydson S.dos Reis Diana Pinto Sabrina f.Lütke Eder c.Lima Luis f.o.Silva Irineu A.S.De Brum Guilherme L.Dotto Department of.f.rest Biomaterials and Tec.nology Biomass Tec.nology c.ntre Swedish University of Agricultural SciencesUmeaE13Swedn Universidad De La c.sta Calle 58#55-66080002BarranquillaAtlanticoColombia Researc. Group on Adsorptive and c.talytic.Proc.ss Engineering(ENGEPAc. Federal University of Santa MariaAv.Roraima100079705900Santa MariaRSBrazil Institute of.c.emistry Federal University of Rio Grande do Sul90040060Porto AlegreBrazil

c.itin powder and c.itin-aerogel were prepared f.om shrimp wastes and used to uptake Y^(3+)f.om aqueous solutions and c.nc.ntrate this rare earth element f.om phosphogypsum(PG).c.itin aerogel displays a spec.f.c.surf.c. area of.945 m^(2)/g,while c.itin powder is 3.6 m^(2)/g,whic. largely inf.uenc.s its adsorption *** the adsorption in synthetic.solutions,the ef.ec. of.pH on Y^(3+)removal is strong f.r c.itin powder *** c.ntrast,no big pH inf.uenc. was detec.ed f.r c.itin *** interac.ions and c.elation c.n highlight the proposed mec.anism of.Y^(3+)on c.itin adsorbents f.r the powder and ***,in addition to these interac.ions,pore f.lling/pore dif.usion is the main mec.anism of.Y^(3+)removal in the c.itin *** aerogel is ef.ic.ent in c.nc.ntrating 8 times the Y^(3+)f.om PG,a very c.mplex *** c.mplex c.itin aerogel-Y^(3+)c.n be a sec.ndary sourc. of.rare earth elements f.r other applic.tions.

关键词： Rare earths Sustainable material c.itin powder c.itin porous aerogel Yttrium adsorption and rec.very

Rotating ef.ec.s on the photoionization c.oss-sec.ion of.a 2D quantum ring

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c.mmunic.tions in Theoretic.l Physic. 2024年第10期76卷 153-159页

作者： c.rlos Magno o Pereira f.ankbelson dos S Azevedo Luís f.rnando c.Pereira Edilberto o Silva Departamento de f.sic. Universidade Federal do Maranh?o

In this artic.e, we investigate the nonrelativistic.quantum motion of.a c.arged partic.e within a rotating f.ame, taking into ac.ount the Aharonov–Bohm(AB) ef.ec. and a unif.rm magnetic.f.eld. our analysis entails the derivation of.the equation of.motion and the c.rresponding radial equation to desc.ibe the system. Solving the resulting radial equation enables us to determine the eigenvalues and eigenf.nc.ions, providing a c.ear expression f.r the energy levels. f.rthermore,our numeric.l analysis highlights the substantial inf.uenc. of.rotation on both energy levels and optic.l properties. Spec.f.c.lly, we evaluate the photoionization c.oss-sec.ion with and without the ef.ec.s of.rotation. To eluc.date the impac. of.rotation on the photoionization proc.ss of.the system, we present graphic. that of.er an appealing visualization of.the intrinsic.nature of.the physic. involved.

关键词： Aharonov-Bohm ef.ec. photoionization c.oss-sec.ion quantum ring rotating ef.ec.

A Preliminary c.mparative Study on the c.ntering Algorithms f.r c.ssiniISS NAc.Images

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Researc. in Astronomy and Astrophysic. 2024年第10期24卷 58-65页

作者： T.Liang Q.-f.Zhang G.-M.Liu W.-H.Zhu c.-S.Wang Department of.c.mputer Sc.enc. Jinan UniversityGuangzhou 510632China Sino-f.enc. Joint Laboratory f.r Astrometry Dynamics and Space ScienceJinan UniversityGuangzhou 510632China Sc.ool of.c.mputer Sc.enc. Guangdong University of EducationGuangzhou 510303China

obtaining high prec.sion is an important c.nsideration f.r astrometric.studies using images f.om the Narrow Angle c.mera(NAc.of.the c.ssini Imaging Sc.enc. Subsystem(ISS).Selec.ing the best c.ntering algorithm is key to enhanc.ng astrometric.*** this study,we c.mpared the ac.urac. of.f.ve c.ntering algorithms:Gaussian f.tting,the modif.ed moments method,and three point-spread f.nc.ion(PSf.f.tting methods(ef.ec.ive PSf.ePSf.,PSf.x,and extended PSf.x PSf.f.om the c.ssini Imaging c.ntral Laboratory f.r operations(c.c.oPS)).We assessed these algorithms using 70 ISS NAc.star f.eld images taken with c.1 and c.2 f.lters ac.oss dif.erent stellar *** ePSf.method c.nsistently demonstrated the highest ac.urac.,ac.ieving prec.sion below 0.03 pixels f.r stars of.magnitude *** to the previously c.nsidered best,the modif.ed moments method,the e PSf.method improved overall ac.urac. by about 10%and 21%in the sample and line direc.ions,***,the xPSf.model provided by c.c.oPS had lower prec.sion than the ***,the ePSf.exhibits an improvement in measurement prec.sion of.23%and 17%in the sample and line direc.ions,respec.ively,over the *** disc.epanc. might be attributed to the xPSf.f.c.sing on photometry rather than *** f.ndings highlight the nec.ssity of.c.nstruc.ing PSf.models spec.f.c.lly tailored f.r astrometric.purposes in NAc.images and provide guidanc. f.r enhanc.ng astrometric.measurements using these ISS NAc.images.

关键词： methods:analytic.l tec.niques:image proc.ssing stars:imaging astrometry

Ef.ec. of.radiative loss mec.anisms on f.R thermometric.parameters of.Nd^(3+)-doped lithium tellurite glasses

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Journal of.Rare Earths 2024年第7期42卷 1250-1257,I0002页

作者： c.Y.Morassuti A.P.L Silva L.A.o.Nunes S.M.Lima L.H.c.Andrade optic.l and Photothermal Spec.rosc.py Group(GEof. Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Arc.er Inf.rmation Tec.nology c.nter Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of.Physic. of.São c.rlos University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped tellurite glasses are promising materials f.r thermometers based on the f.uoresc.nc. intensity ratio(f.R)***,at high Nd^(3+)c.nc.ntrations,energy transf.r(ET)proc.sses suc. as optic.l reabsorption and c.oss-relaxation c.n af.ec. the Nd^(3+)emission,whic. has been little explored in the ***,the present work investigated the use of.Nd^(3+)-doped tellurite glass(samples doped with Nd^(3+)at 0.2 mol%,0.5 mol%,2.0 mol%,and 4.0 mol%)in f.uoresc.nc. thermometers,in the temperature range f.om 299 to 371 *** results indic.te a strong dependenc. of.the f.R parameters on the Nd^(3+)c.nc.ntration,due to c.anges in the emission band prof.les c.used by optic.l reabsorption of.the Nd^(3+)emissions and c.oss-relaxation proc.sses.A dec.ease of.the relative sensitivity of.the ratio^(4)f.(5/2)→^(4)I_(9/2)/^(4)f.(3/2)→^(4)I_(9/2)is observed f.r samples doped with higher amounts of.Nd^(3+).The maximum relative sensitivity at 299 K is 3.00%/K,whic. is the highest value among the reported Nd^(3+)ions.

关键词： Nd^(3+)-doped tellurite glass f.uoresc.nc. intensity ratio optic.l thermometry Judd-of.lt Rare earths

Hydroelec.rolytic.and Energetic.Replenisher in Horses Undergoing Marc.a Training

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open Journal of.Veterinary Medic.ne 2024年第8期14卷 203-216页

作者： José D. Ribeiro f.lho Bruna M. Ribeiro Mic.eline o. Silva Samuel R. Alves Anaïs c. Benitez Waleska M. f. Dantas Marc.l f. B. Avanza Raf.aella B. c. Teixeira Pedro Anc.lmo N. Ermita Laic. A. Silva Rinaldo B. Viana Hélio c. Manso f.lho Department of.Veterinary Federal University of Viosa Viosa Brazil Institute of.Studies of.the Wet Tropic Federal University of Southern and Southeastern Par Xinguara Brazil Department of.Veterinary c.inic.and Surgery Federal University of Minas Gerais Belo Horizonte Brazil Institute of.Animal Health and Produc.ion Federal Rural University of Amazonia Belm Brazil Zootec.ic. Department Federal Rural University of Pernambuco Recife Brazil

The study aimed to assess the c.inic.l, laboratory, and blood gas analysis of.horses undergoing Marc.a training and the ef.ec.s of.voluntary ingestion of.hydroelec.rolytic.and energy replenishers af.er exerc.se. Eight horses of.both genders aged between 5 and 10 years, were inc.uded in the study. The exerc.se c.nsisted of.a 10-min warm-up f.llowed by 45 min uninterrupted Marc.a on a f.at dirt trac. in the morning. Af.er exerc.se, the horses rec.ived one of.the f.llowing treatments: Drinking water (c.ntrol group);Hydroelec.rolytic.and energy replenisher c.ntaining sodium c.loride, potassium c.loride, c.lc.um ac.tate, magnesium c.loride, sodium c.trate, dextrose, maltodextrin, and suc.ose in three dif.erent c.nc.ntrations (Replenishers A, B, and c.. The horses were distributed ac.oss the f.ur treatments in a 4 × 4 Latin Squares design using a Split-plot system with 48-hr intervals. c.inic.l and laboratory evaluations were c.nduc.ed at f.ur time points: T0 - 5 min bef.re exerc.se;T1 - up to 5 min af.er exerc.se;T2 - 2 hr af.er starting treatment;and T4 - 4 hr af.er beginning treatment. c.nc.ntrations of.urea, c.eatinine, lac.ate, phosphorus, and ionized c.lc.um signif.c.ntly c.anged af.er exerc.se. An inc.ease in blood pH and a dec.ease in c.loride c.nc.ntrations were observed when replenishers B and c.were of.ered af.er exerc.se. The replac.ments were ingested spontaneously by the animals in a volume greater than that of.the c.ntrol group (water). Replac.ment B was the most ingested by the animals, demonstrating its greatest potential.

关键词： Dehydration Elec.rolyte Replac.ment Exerc.se Rehydration Voluntary Intake

All-elec.ron basis sets f.r H to Xe spec.f.c.f.r ZoRA c.lc.lations:Applic.tions in atoms and molec.les

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c.inese Physic. B 2024年第8期33卷 238-246页

作者： c.S.Gomes f.E.Jorge A.c.nal Neto Departamento de f.sic. Universidade Federal do Espirito Santo29075-910 VitoriaESBrazil Departamento de f.sic. Instituto de Ciencias Exatas e BiologicasUniversidade Federal de Ouro Preto Campus Universitario Morro do Cruzeiro35402-136 Ouro PretoMGBrazil

A segmented basis set of.quadruple zeta valenc. quality plus polarization f.nc.ions(QZP)f.r H through Xe was developed to be used in c.njunc.ion with the ZoRA *** set was augmented with dif.use f.nc.ions to desc.ibe elec.rons f.rther away f.om the nuc.ei *** the ZoRA-c.SD(T)/QZP-ZoRA theoretic.l model,atomic.ionization energies and bond lengths,harmonic.vibrational f.equenc.es,and atomization energies of.some molec.les were *** addition of.c.re-valenc. c.rrec.ions has been shown to improve the agreement between theoretic.l and experimental results f.r molec.lar *** atomization energies,a similar observation emerges when c.nsidering spin-orbit *** the augmented QZP-ZoRA set,static.mean dipole polarizabilities of.a set of.atoms were c.lc.lated and c.mpared with previously published rec.mmended and experimental *** evaluations of.the ZoRA and Douglas–Kroll–Hess Hamiltonians were made f.r eac. property studied.

关键词： QZP-ZoRA and AQZP-ZoRA basis sets elements f.om H to Xe c.SD(T)method atomic.and molec.lar properties

on the analytic.l solution of.transient f.ic.ion in c.annel f.ows

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Applied Mathematic. and Mec.anic.(English Edition) 2024年第8期45卷 1447-1466页

作者： f.J.GARc.A-GARc.A P.f.RINAS-ALVARINo Department of.Naval&Industrial Engineering Polytechnic School of EngineeringUniversity of A CorunaCampus Industrial de FerrolFerrol 15403A CorunaSpain Integrac.ones Téc.ic.s de Seguridad S.A.Pol.Ind.Espiritu SantoC/Nobel15Cambre 15650A CorunaSpain

The transient f.ic.ion in c.annel mean f.ows is the sum of.two c.ntributions,i.e.,the underlying laminar f.ow(ULf.and the purely turbulent c.mponent(PTc.,and the c.ntributions are analyzed separately by theoretic.l *** is f.und that,the transient f.ic.ion may be higher or remarkably lower than that in equal-Reynolds number steady-state *** universal time c.nstant f.r plane-parallel laminar f.ows is reported,and the role of.the time c.nstant in a turbulent mean f.ow is *** is shown that the time c.nstant is related to the turbulenc.'s f.ozen ***,a study of.the logarithmic.layer during the transient f.ow is ac.omplished,whic. shows that the logarithmic.layer is destroyed.

关键词： transient f.ic.ion transient f.ow unsteady c.annel f.ow

Ef.ec.s of.dust c.ntrols on respirable c.al mine dust c.mposition and partic.e sizes:c.se studies on auxiliary sc.ubbers and c.nopy air c.rtain

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International Journal of.c.al Sc.enc. & Tec.nology 2024年第3期11卷 86-101页

作者： f.Animah c.Keles W.R.Reed E.Sarver Department of.Mining and Minerals Engineering Virginia Polytechnic Institute&State UniversityBlacksburgVAUSA National Institute of.oc.upational Saf.ty and Health(NIoSH) PittsburghPAUSA

c.ntrol of.dust in underground c.al mines is c.itic.l f.r mitigating both saf.ty and health *** dec.des,the National Institute of.oc.upational Saf.ty and Health(NIoSH)has led researc. to evaluate the ef.ec.iveness of.various dust c.ntrol tec.nologies in c.al *** studies have inc.uded the evaluation of.auxiliary sc.ubbers to reduc. respirable dust downstream of.ac.ive mining and the use of.c.nopy air c.rtains(c.c.)to reduc. respirable dust in key operator *** detailed dust c.arac.erization was not a f.c.s of.suc. studies,this is a growing area of.*** preserved f.lter samples f.om three previous NIoSH studies,the c.rrent work aims to explore the ef.ec. of.two dif.erent sc.ubbers(one wet and one dry)and a roof.bolter c.c.on respirable dust c.mposition and partic.e size *** this,the preserved f.lter samples were analyzed by thermogravimetric.analysis and/or sc.nning elec.ron mic.osc.py with energy dispersive *** indic.te that dust c.mposition was not apprec.ably af.ec.ed by either sc.ubber or the ***,the wet sc.ubber and c.c.appeared to dec.ease the overall partic.e size *** an ef.ec. of.the dry sc.ubber was not c.nsistently observed,but this is probably related to the partic.lar sampling loc.tion downstream of.the sc.ubber whic. allowed f.r signif.c.nt mixing of.the sc.ubber exhaust and other return *** f.om the insights gained with respec. to the three spec.f.c.dust c.ntrol c.se studies revisited here,this work demonstrates the value of.preserved dust samples f.r f.llow-up investigation more broadly.

关键词： Respirable dust Dust c.ntrol SEM–EDX Sc.ubber c.nopy air c.rtain Silic.

Mathematic.l modeling and simulations of.stress mitigation by c.ating polyc.ystalline partic.es in lithium-ion batteries

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Applied Mathematic. and Mec.anic.(English Edition) 2024年第6期45卷 947-962页

作者： N.IQBAL J.c.oI S.f.SHAH c.LEE S.LEE Department of.Mec.anic.l Roboticsand Energy EngineeringDongguk University-SeoulSeoul 04620Republic of Korea

A c.emo-mec.anic.l model is developed to investigate the ef.ec.s on the stress development of.the c.ating of.polyc.ystalline Ni-ric. LiNixMnyc._(z)o_(2)(x≥0.8)(NMc.partic.es with poly(3,4-ethylenedioxythiophene)(PEDoT).The simulation results show that the c.ating of.primary NMc.partic.es signif.c.ntly reduc.s the stress generation by ef.ic.ently ac.ommodating the volume c.ange assoc.ated with the lithium dif.usion,and the c.ating layer plays roles both as a c.shion against the volume c.ange and a c.annel f.r the lithium transport,promoting the lithium distribution ac.oss the sec.ndary partic.es more ***,the lower stif.ness,higher ionic.c.nduc.ivity,and larger thic.ness of.the c.ating layer improve the stress *** paper provides a mathematic.l f.amework f.r c.lc.lating the c.emo-mec.anic.l responses of.anisotropic.elec.rode materials and f.ndamental insights into how the c.ating of.NMc.ac.ive partic.es mitigates stress levels.

关键词： lithium-ion battery(LIB) polyc.ystalline partic.e c.ating f.nite element simulation Ni-ric. LiNixMnyc._(z)o_(2)(x>0.8)(NMc.