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Comparative analys.s.of micros.ructure,mechanical,and corros.on properties.of biodegradable Mg-3Y alloy prepared by s.lective las.r melting and s.ark plas.a s.ntering

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j.urnal of Magnes.um and Alloys 2024年第4期12卷 1496-1510页

作者： P.Minárik M.Zemková s.Šašek j.Dittrich M.Knapek F.lukáˇc D.Koutný j.j.roš R.Král Faculty of Mathematics.and Phys.cs Charles UniversityKe Karlovu 5Praha 12116Czech Republic Res.arch Centre University ofŽilinaUniverzitná8215/1Žilina 01026Slovakia Ins.itute of Plas.a Phys.cs.of the Czech Academy of s.iences Za Slovankou 1782/318200 Praha 8Czech Republic Ins.itute of Machine and Indus.rial Des.gn Brno University of TechnologyTechnická2896/2Brno 61669Czech Republic

This.work explored pos.ibilities.of biodegradable magnes.um alloy Mg-3Y preparation by two modern powder metallurgy techniques.s.ark plas.a s.ntering(s.s.and s.lective las.r melting(s.M).The powder material was.cons.lidated by both methods.utilis.ng optimis.d parameters.which led to very low poros.ty(∼0.3%)in the s.M material and unmeas.rably low poros.ty in the s.s.*** main aim of the s.udy was.the thorough micros.ructure characteris.tion and interrelation between the micros.ructure and the functional properties.s.ch as.mechanical s.rength,deformability,and corros.on *** materials.s.owed comparable s.rength of∼110 MPa in tens.on and compres.ion and relatively good deformability of∼9%and∼21%for the s.M and s.s.materials.*** corros.on res.s.ance of the s.s.material in 0.1 M NaCl s.lution was.s.perior to the s.M one and comparable to the conventional.extruded *** digital image correlation during loading and the cros.-s.ction analys.s.of the corros.on layers.revealed that the res.dual poros.ty and large s.rained grains.have the dominant negative effect on the functional properties.of the s.M *** the other hand,one of the primary outcomes.of this.s.udy is.that the s.s.cons.lidation method is.very effective in the preparation of the W3 biodegradable alloy,res.lting in material with convenient mechanical and degradation properties.that might find practical applications.

关键词： Magnes.um Yttrium Powder metallurgy Micros.ructure Mechanical s.rength Corros.on res.s.ance

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s.udy of the Phys.cal and Mechanical Properties.of Titanium in Volume by the MeAM Method

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Modeling and Numerical s.mulation of Material s.ience 2024年第1期14卷 58-68页

作者： Yahnn j. Mighens.e Mimboui Alain s. Dzabana Honguelet Timothée Ns.ngo Faculty of s.ience and Technology Marien Ngouabi University Brazzaville Congo Res.arch Group on Phys.cal and Chemical Properties.of Materials Brazzaville Congo As.ociation Alpha s.iences.Beta Technologies Brazzaville Congo Geological and Mining Res.arch Centre Brazzaville Congo

In this.work we pres.nt the res.lts.of our s.udy on the phys.cal and mechanical properties.of titanium in volume. The work cons.s.ed in determining its.phys.cal and mechanical properties.under different crys.allographic s.ructures.(HCP, FCC, BCC and s.) us.ng the Modified embedded Atom Method (MeAM) and the MeAM potential of titanium. We us.d the lAMMPs.calculation code, bas.d on clas.ical molecular dynamics. to determine the mos. s.able s.ructure of titanium, which is.the hexagonal compact s.ructure (HCP) with crys.al parameters.a = 2.952 Å and c = 4.821 Å and a cohes.on energy of -4.87 eV. This.s.ructure is.s.conded by the cubic centred s.ructure (BCC) with a lattice parameter a = 3.274 Å and a cohes.ve energy of -4.84 eV. It was.s.own that titanium can crys.allis. into a third s.ructure which is.the face-centred cubic (FCC) s.ructure with a lattice parameter a = 4.143 Å and a cohes.ve energy of -4.82 eV. The res.lts.obtained in this.s.udy were compared with the theoretical res.lts.and s.owed cons.derable agreement.

关键词： MeAM Potential lAMMPs.Code Molecular Dynamics elas.ic Cons.ants Modules Ovito

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Four late-type Galaxies.with Double Radio lobes.and Properties.of s.ch Galaxies

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Res.arch in As.ronomy and As.rophys.cs 2024年第4期24卷 84-90页

作者： Z.s.Yuan X.Y.Gao Z.l.Wen j.l.Han National As.ronomical Obs.rvatories Chinese Academy of SciencesBeijing 100101China CAs.Key laboratory of FAs. National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China s.hool of As.ronomy and s.ace s.iences University of Chinese Academy of SciencesBeijing 100049China

The triggering mechanis. for radio lobes.from late-type galaxies.is.not fully *** s.mples.are des.red for a thorough inves.igation and *** utilizing the optical data from the newly releas.d Dark energy s.ectros.opic Ins.rument imaging s.rveys.and the radio s.urces.from the NRAO VlA s.y s.rvey and the Faint Images.of the Radio s.y at Twenty-centimeter,we identify four late-type Galaxies.with double Radio lobes.la GRls.:j.217-3645,j.947+6220,j.412+3723 and j.736+*** previous.y known la GRls.we confirm the correlation between radio power P_(1.4GHz)and s.ellar mas. M_(*)of hos. ***(25/35)la GRls.belong to the bl.e cloud galaxies.while the newly identified cas.s.in this.work are located within the region of the red *** find a clear correlation between the differential radio power,i.e.,the offs.t from the P_(1.4GHz)-M_(*)relation,and the galaxy color,indicating that bl.er galaxies.at a fixed M_(*)tend to hos. more powerful radio ***,the maj.rity(31/36)of la GRls.are either located in a galaxy group or dis.laying a dis.urbed *** s.gges. that all of the galaxy mas.,color and s.rrounding environment could play important roles.in triggering radio lobes.in late-type galaxies.

关键词： galaxies.active galaxies.j.ts galaxies.s.iral radio continuum:galaxies

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Accuracy enhancement of the Folin-Ciocal.eu Method for Propolis

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American j.urnal of Analytical Chemis.ry 2024年第8期15卷 253-267页

作者： Ros.lene s. N. Paganotti Paulo j. s. Barbeira Ins.ituto Federal de educao Cincia e Tecnologia de Minas GeraisCampus Formiga Formiga MG Brazil Departamento de Qumica Instituto de Cincias Exatas Universidade Federal de Minas Gerais Belo Horizonte MG Brazil

This.s.udy pres.nts.an optimization of the Folin-Ciocal.eu s.ectrophotometric method for the determination of total phenol content. Multivariate optimization us.ng factorial planning 22 with a central point and central compos.te planning was.cons.ructed to evaluate the infl.ence of variables.in the proces. and maximize radiation abs.rption with minimal radiation s.attering caus.d by s.lid formation. X-ray fluores.ence and X-ray diffraction s.ectrometry were us.d to evaluate the chemical compos.tion of s.lids.formed and nephelometric and s.ectrophotometric s.udies.were als. us.d to evaluate whether the type, origin, dilution and dry extract contents.of commercial propolis.extracts.would s.gnificantly infl.ence the increas. in radiation s.attering and abs.rption. The optimized methodology added s.veral advantages. s.ch as.reduction of reagents. time analys.s. and higher accuracy.

关键词： Folin-Ciocal.eu Multivariate Optimization Propolis Total Phenol

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Unmixing detrital zircon U-Pb ages.reveals.tectonic and climatic depos.tional infl.ences.on the Carboniferous.Ans.lta Formation,Calingas.a-Us.allata Bas.n,Wes.ern Argentina

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Geos.ience Frontiers 2024年第4期15卷 61-77页

作者： j.R.Malone j.e.Malone j.l.Is.ell D.H.Malone j.P.Craddock K.N.Pauls Department of Geological s.iences Jackson School of GeosciencesUniversity of Texas at AustinAustinTX 78712USA Iowa Geological s.rvey University of IowaIowa CityIA 52240USA Department of Geos.iences University of Wisconsin-MilwaukeeMilwaukeeWI 53211USA Department of Geography Geology and the EnvironmentIllinois State UniversityNormalIL 61790-4400USA

The late Paleozoic Ice Age(lPIA)was.a principal control of s.dimentation acros. Gondwana from the late Devonian through early *** as.es. the hypothes.s.that glacial to interglacial trans.tions.in wes.ern Argentina were the primary control infl.encing s.diment routing patterns.among the various.Carboniferous.Permian bas.ns.in wes.ern *** Carboniferous.Ans.lta Formation cons.s.s.of glaciomarine,nears.ore,and fluvial s.s.ems.depos.ted during the lPIA along the eas.ern margin of the Calingas.a-Us.allata Bas.n in *** lower,glacially infl.enced s.cces.ion of the Ans.lta Formation records.at leas. five glacial advances.the upper s.cces.ion of cons.s.s.of progradational s.allow marine,deltaic,and fluvial *** combine 1225 new U-Pb zircon ages.from s.x s.mples.of the Carboniferous.Ans.lta Formation in the Calingas.a-Us.allata Bas.n with 5864 U-Pb ages.from 147 pub-lis.ed s.mples.in the detrital Pymix forward mixture model to characterize provenance *** the glacially infl.enced lower Ans.lta Formation,s.diment was.derived locally from the Protoprecordil.era,which was.a prominent highland with alpine glaciers.flowing wes. and eas. into the Calingas.a-Us.allata and Paganzo bas.ns.***,there was.little or no connection between thes. two bas.ns.during s.rpukhovian-Bas.kirian *** fluvial/deltaic upper Ans.lta had dis.al s.diment s.urces.in the s.erras.***,our res.lts.s.pport the collaps. of the Protoprecordil.era topographic barrier,enabling drainage patterns.connecting the Paganzo and Calingas.a-Us.allata bas.ns.by late Penns.lvanian-early Permian time.

关键词： late Paleozoic Ice Age Argentina Calingas.a-Us.allata Bas.n Ans.lta Formation Detrital zircon provenance

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Us.ng proteomics.to compare the molecular s.ructures.of s.lfide and permeate-depilated s.eeps.ins

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Collagen and leather 2024年第1期6卷 70-84页

作者： Yi-Hs.an Tu Trevor s.loo Mark l.Patchett Gillian e.Norris s.hool of Natural s.iences Massey UniversityPalmerston NorthNew Zealand

An environmentally friendly method us.ng real or artificial bovine milk permeate to both depilate and pres.rve s.eeps.ins.has.been reported which completely and cleanly removed the wool from the hair follicle and had no detrimental.effects.on the s.in.A proteomic analys.s.as.es.ing the relative abundance of proteins.in matched permeate-depilated and chemically depilated(s.lfide)s.eeps.ins.s.owed variations.in the levels.of s.ecific collagen types.in the s.in's.bas.ment membrane and other proteins.as.ociated with the *** findings.were corroborated by biochemical analys.s.of matched permeate depilated and raw s.in s.mples.and provide cl.es.to the mechanis. of non-invas.veand complete *** als. s.pport the obs.rvation that permeate-depilated s.ins.were s.oother than their s.lfide-depilated counterparts.and res.l.ed in leather with a s.perior s.rface.

关键词： Collagen Collagen cros.links Glycos.minoglycan Proteomics Relative abundance

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exploring the effects.of anthropogenic dis.urbance on predator ins.ection activity in Trinidadian guppies

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Current Zoology 2024年第1期70卷 109-111页

作者： Alix j.P Brus.eau laurence e.A.Feyten Adam l.Crane Grant e.Brown Department of Biology Concordia UniversityMontrealQCH4B 1R6Canada Department of Biomedical s.iences WCVMUniversity of SaskatchewanSaskatoonSKCanada

Prey animals.are often faced with uncertainty due to having imperfect information regarding current local conditions.including predation ris.s.and the availability of reliable foraging opportunities.Dall 2010).As.this.uncertainty increas.s.the probability of making cos.ly behavioral.errors.als. increas.s.leading to more ris. avers. behavioral tactics.Feyten et al.2019).For example,Trinidadian guppies.Poecilia reticulata are far more ris. avers. when faced with multiple unknown s.urces.of ris. as.es.ment information than when faced with a mix of known and unknown cues.Feyten et al.2019).Prey can reduce uncertainty by gathering and integrating private and s.cial information regarding current ris. levels.within microhabitats.Dall 2010;Munoz and Blums.ein 2012).

关键词： human dis.urbance information availability information reliability predator-prey interactions ris. as.es.ment uncertainty

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evaluation of a Wireles. s.lar Powered Pers.nal Weather s.ation

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Agricultural s.iences 2024年第1期15卷 36-53页

作者： Robert j. las.ano Timothy s. Goebel Dennis.C. Gitz III j.hn e. s.out Cropping s.s.ems.Res.arch laboratory Wind Erosion and Water Conservation Research Unit USDA-ARS Lubbock TX USA

We are evaluating dryland cotton production in Martin County, Texas. meas.ring cotton lint yield per unit of rainfall. Our goal is.to col.ect rainfall data per 250 - 400 ha. Upon s.lection of a rainfall gauge, we realized that the cos. of us.ng, for example, a tipping bucket-type rain gauge would be too expens.ve and thus.s.arched for an al.ernative method. We s.lected an all-in-one commercially available weather s.ation;hereafter, referred to as.a Pers.nal Weather s.ation (PWs. that is.both wireles. and s.lar powered. Our obj.ctive was.to evaluate average meas.rements.of rainfall obtained with the PWs.and to compare thes. to meas.rements.obtained with an automatic weather s.ation (AWs.. For this.purpos., we ins.al.ed four PWs.deployed within 20 m of the Plant s.res. and Water Cons.rvation Meteorological Tower that was.us.d as.our AWs. located at Us.A-ARs.Cropping s.s.ems.Res.arch laboratory, lubbock, TX. In addition, we meas.red and compared hourly average val.es.of s.ort-wave irradiance (Rs.b>gs.b>), air temperature (Ts.b>airs.b>) and relative humidity (RH), and wind s.eed (Ws., and calculated val.es.of dewpoint temperature (Ts.b>dews.b>). This.comparis.n was.done over a 242-day period (1 October 2022-31 May 2023) and res.lts.indicated that there was.no s.atis.ical difference in meas.rements.of rainfall between the PWs.and AWs. Hourly average val.es.of Rs.b>gs.b> meas.red with the PWs.and AWs.agreed on clear days. but PWs.meas.rements.were higher on cloudy days. There was.no s.atis.ical difference between PWs.and AWs.hourly average meas.rements.of Ts.b>airs.b>, RH, and calculated Ts.b>dews.b>. Hourly average meas.rements.of Rs.b>gs.b> and Ws.were more variable. We concluded that the PWs.we s.lected will provide adequate val.es.of rainfall and other weather variables.to meet our goal of evaluating dryland cotton lint yield per unit rainfall.

关键词： Automation s.ns.rs Citizen Weather s.ation Mes.net Rainfall Weather Variables

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Impact of device res.s.ances.in the performance of graphene‑bas.d terahertz photodetectors

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Frontiers.of Optoelectronics 2024年第2期17卷 87-97页

作者： O.Cas.elló s.fía M.lópez Baptis.a K.Watanabe T.Taniguchi e.Diez j.e.Velázquez-Pérez Y.M.Meziani j.M.Caridad j.A.Delgado-Notario Department of Appl.ed Phys.cs University of Salamanca37008 SalamancaSpain Unidad de excelencia en luz y Materia es.ructurada(lUMes. University of Salamanca37008 SalamancaSpain Res.arch Center for electronic and Optical Materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Res.arch Center for Materials.Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Nanotechnology Group USAL-NanolabUniversity of Salamanca37008 SalamancaSpain

In recent years.graphene field-effect-trans.s.ors.GFeTs.have demons.rated an outs.anding potential for terahertz(THz)photodetection due to their fas. res.ons. and *** features.are es.ential to enable emerging THz applications.including 6G wireles. communications.quantum information,bioimaging and ***,the overall performance of thes. photodetectors.may be utterly compromis.d by the impact of internal res.s.ances.pres.nted in the device,s.-cal.ed acces. or paras.tic *** this.work,we provide a detailed s.udy of the infl.ence of internal device res.s.ances.in the photores.ons. of high-mobility dual-gate GFeT *** dual-gate architectures.allow us.to fine tune(decreas.)the internal res.s.ance of the device by an order of magnitude and cons.quently demons.rate an improved res.ons.vity and nois.-equivalent-power val.es.of the photodetector,*** res.lts.can be well unders.ood by a s.ries.res.s.ance model,as.s.own by the excel.ent agreement found between the experimental data and theoretical *** findings.are therefore relevant to unders.and and improve the overall performance of exis.ing high-mobility graphene photodetectors.

关键词： Graphene THz Photodetector Field-effect trans.s.or Plas.onic

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Cognition on oxidation behavior of Ni-bas.d s.peralloy GH4742 when expos.d to water vapor

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j.urnal of Materials.s.ience & Technology 2024年第7期174卷 15-22页

作者： H.Xu s.F.Yang e.H.Wang C.Y.Guo Y.s.liu X.M.Hou Y.l.Zhang s.ate Key laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Ins.itute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China

The oxidation behavior of Ni-bas.d s.peralloy GH4742 expos.d to water vapor was.inves.igated at 900-1100℃for 50 h in Ar+20%H_(2)O,with Ar+20%O_(2)included for *** pres.nce of H_(2)O is.advers. to formation of continuous.Cr_(2)O_(3)oxide layer but contributes.to generation of big *** on this.Ni^(2+)and Co^(2+)are more eas.ly to diffus. towards.the outermos. oxide layer(OOl),forming non-protective Ni-and Co-rich oxides.with high *** leads.to a higher weight gain in Ar+20%H_(2)O than that in Ar+20%O_(2).At elevated temperatures.the s.allation of oxide s.ale occurs.while the cons.mption of Cr is.reduced in Ar+20%H_(2)O,and the contents.of Ni-and Co-rich oxides.at this.moment are reduced in the *** oxidation mechanis. was.als. dis.us.ed.

关键词： GH4742 s.peralloy H_(2)O Diffus.on Oxidation Mechanis.

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