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r.diofr.quency electr.c-field heating behavior. of highly enr.ched semiconducting and metallic single-walled car.on nanotubes

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Nano r.sear.h 2015年第9期8卷 2859-2870页

作者： Stuar. J. Cor. Mustafa r.oof Br.ndon T. Cisner.s Alvin W. Or.aek Matthew A. Cheney Justin J. Law Nadia C. Lar. andrew r. barron Lon J. Wilsor.Steven A. Cur.ey Division of Sur.er. Baylor College of Medicine Houston TX 77030 USA Depar.ment of Sur.ical Oncology University of Texas M.D. Anderson Cancer Center Houston TX 77030 USA Depar.ment of Chemistr. and the r.char. E. Smalley Institute for.Nanoscale Science and Technology Rice University Houston TX 77005 USA Depar.ment of Sur.er. The University of Arizona College of Medicine Tucson AZ 85724 USA Depar.ment of Chemistr. and Biochemistr. University of California San Diego La Jolla CA 92093 USA College of Engineer.ng Swansea University Singleton Park Swansea SA2 8PP Wales UK Depar.ment of Mechanical Engineer.ng and Mater.als Science Rice University Houston TX 77005 USA

It is theor.zed that enhanced ther.al heating may r.sult fr.m exposing single-walled car.on nanotubes （SWNTs） embedded in a conductive host to r.diofr.quency （r.） electr.c fields. We examine the r.-induced （13.56 MHz） heating behavior. of 95% metallic- and semiconducting-enr.ched SWNTs （m-/s-SWNTs） suspended in aqueous solutions with var.ing NaC1 molar.ty （0.001 mM-1 M）. The heating effects wer. only evident for.host molar.ties below 1 mM （equivalent to 0.1 S/m） at which the s-SWNT heating r.tes dominated those of the m-SWNTs. The heating effects wer. localized to aligned and aggr.gated ＂SWNT r.pes＂ -1 cm in length that for.ed in suspension, par.llel to the electr.c-field vector. dur.ng the r. exposur.. For.molar.ties above 1 mM, no enhancements wer. evident, owing to the lar.e heating effects of the bulk ionic NaC1 suspensions, which wer. obser.ed in pr.vious studies. Although lar.er.enhancement effects pr.por.ional to the host conductivity have been theor.tically pr.dicted for.m-/s-SWNT suspensions, this was not obser.ed most likely because of the aggr.gation and scr.ening effects, which diminished the scatter.d electr.c field near.the m-/s-SWNTs. Our.r.sear.h may fur.her.the development of better.nanopar.icle heating agents for.applications such as non-invasive r.-induced cancer.hyper.her.ia.

关键词： r.d.iofr.quency,car.on nanotubes,metallic,semiconducting,hyper.her.ia

r.dical Addition of Per.luor.nated Alkyl Iodides to Multi- Layer.d Gr.phene and Single-Walled Car.on Nanotubes

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Nano r.sear.h 2010年第2期3卷 138-145页

作者： Chr.stopher.E.Hamilton Jay r.Lomeda Zhengzong Sun James M.Tour.andrew r.barron r.char. E.Smalley Institute for.Nanoscale Science and Technology Department of Chemistry and Department of Mechanical Engineering and Materials ScienceRice UniversityHoustonTexas 77005USA

A simple one-pot r.action that ser.es to functionalize gr.phite nanosheets(gr.phene)and single-walled car.on nanotubes(SWNTs)with per.luor.nated alkyl gr.ups is *** r.dical addition of 1-iodo-1H,1H,2H,2H-per.luor.dodecane to or.ho-dichlor.benzene suspensions of the car.on nanomater.al is initiated by ther.al decomposition of benzoyl ***,UV photolysis of 1-iodo-per.luor.decane ser.es to functionalize the car.on ***-SWNTs,per.luor.dodecyl-gr.phene,and per.luor.decyl-gr.phene ar. char.cter.zed by infr.r.d(Ir.and r.man spectr.scopy,X-r.y photoelectr.n spectr.scopy(XPS),ther.ogr.vimetr.c analysis(TGA),and atomic for.e micr.scopy(AFM).The pr.ducts show enhanced disper.ability in CHCl3 as compar.d to unfunctionalized star.ing *** advantage of this one-pot functionalization pr.cedur. lies in the use of pr.stine gr.phite as star.ing mater.al ther.by avoiding the use of har.h oxidizing conditions.

关键词： Nanotube single-walled car.on nanotube gr.phene r.dical addition

Demonstr.tion of Covalent Sidewall Functionalization of Single Wall Car.on Nanotubes by NMr.Spectr.scopy:Side Chain Length Dependence on the Obser.ation of the Sidewall sp^(3)Car.ons

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Nano r.sear.h 2008年第1期1卷 72-88页

作者： Liling Zeng Lawr.nce B.Alemany Chr.stopher.L.Edwar.s andrew r.barron r.char. E.Smalley Institute for.Nanoscale Science and Technology and Depar.ment of Chemistr. Rice UniversityHoustonTX 77005USA

Car.oxylic acid-functionalized single walled car.on nanotubes(SWNTs)pr.par.d via the r.action of an amino acid,NH2(CH2)nCO2H wher. n=1(glycine,GLY),5(6-aminohexanoic acid,AHA),10(11-aminoundecanoic acid,AUDA),with fl uor.nated single walled car.on nanotubes(F-SWNTs)have been char.cter.zed by MAS 13C NMr.*** ease of obser.ing the aliphatic CH2 gr.ups and the r.solution of the signal ar. dependent on the length of the amino acid’s aliphatic *** have pr.posed that wher. substituent chains ar. shor.(making NMr.data collection difficult)chemical modification to extend the chain length should alleviate analysis *** this r.gar.,we have investigated the ester.fi cation of the car.oxylic acid *** amino acid-functionalized SWNTs wer. ester.fied with an appr.pr.ate alcohol to ensur. par.ty of the over.ll substituent length,i.e.,GLY-SWNT(C1)+1-dodecanol(C_(12))=DOD-GLY-SWNT(1),AHA-SWNT(C_(5))+1-octanol(C_(8))=OCT-AHA-SWNT(2),and AUDA-SWNT(C_(10))+1-pr.panol(C_(3))=Pr.-AUDA-SWNT(3).The 13C NMr.shift for.the sp3 nitr.gen-substituted car.on atoms of the SWNT sidewall is obser.ed atδ≈75 *** the length of SWNT sidewall functional gr.ups enhances the ability to obser.e the sidewall sp^(3)*** methylene car.on signal intensity is less attenuated in the dipolar.dephasing spectr.m of the ester.functionalized SWNTs than their.associated amino acid der.vatives,suggesting mor. motional fr.edom of the side chain in the solid *** confi r.ation of the dipolar.dephasing spectr.l effects was assisted by the char.cter.zation of the ester.of AUDA-SWNT with 1,3-pr.panediol:PPD-AUDA-SWNT(4).

关键词： Single walled car.on nanotube(SWNT) nuclear.magnetic r.sonance(NMr. ester.fication amino acid functionalization

Numer.cal Solution of Par.ial Differ.ntial Equations in Ar.itr.r. Shaped Domains Using Car.esian Cut-Stencil Finite Differ.nce *** II:Higher.Or.er.Schemes

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Numer.cal Mathematics(Theor.,Methods and Applications) 2022年第3期15卷 819-850页

作者： M.Esmaeilzadeh r.M.barron Depar.ment of Mechanical Automotive&Materials EngineeringUniversity of WindsorWindsorOntarioN9B 3P4Canada Depar.ment of Mathematics&Statistics University of WindsorWindsorOntarioN9B 3P4Canada Depar.ment of Mechanical Engineer.ng South Tehran BranchIslamic Azad UniversityTehranP.C:***Iran

Compact higher.or.er.HO)schemes for.a new finite differ.nce method,r.fer.ed to as the Car.esian cut-stencil FD method,for.the numer.cal solution of the convection-diffusion equation in complex shaped domains have been addr.ssed in this *** Car.esian cut-stencil FD method,which employs 1-D quadr.tic tr.nsfor.ation functions to map a non-unifor.(uncut or.cut)physical stencil to a unifor. computational stencil,can be combined with compact HO Pad´e-Her.itian for.ulations to pr.duce HO cut-stencil *** modified par.ial differ.ntial equation technique is used to develop for.ulas for.the local tr.ncation er.or.for.the cut-stencil HO *** effect of var.ous HO appr.ximations for.Neumann boundar. conditions on the solution accur.cy and global or.er.of conver.ence ar. *** numer.cal r.sults for.second-or.er.and compact HO for.ulations of the Car.esian cut-stencil FD method have been compar.d for.test pr.blems using the method of manufactur.d solutions.

关键词： Car.esian cut-stencil finite differ.nce method compact higher.or.er.for.ulation ir.egular.domain Neumann boundar. conditions local tr.ncation er.or

Chr.mium Adsor.tion in Differ.nt Miner.logical Fr.ctions fr.m Subtr.pical Soils

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Pedospher. 2017年第1期27卷 106-111页

作者： Jovana BAVAr.SCO Jesse r. FINK Mar.a Lucia K. r.Dr.GUES Clesio GIANELLO Vidal barron Jose TOr.ENT Depar.ment of Soils Federal University of Rio Grande do Sul 91540-000 Porto Alegre Rio Grande do Sul (Brazil) Labor.tor. of Soils Federal Institute of Parand 85555-000 Palmas Parand (Brazil) Depar.ment of r.sear.h and Labor.tor. Environmental Protection Foundation of Rio Grande do Sul State 90620-090 Porto AlegreRio Grande do Sul (Brazil) Depar.ment of Agr.nomy University of Cdrdoba C4 Building Campus of Rabanales 14071 C6rdoba (Spain)

Safe application of chr.mium （Cr.-containing or.anic industr.al wastes to soil r.quir.s consider.ng the ability of the soil to adsor. Cr. In this study, the maximum Cr.adsor.tion capacity was assessed for.the bulk samples and their.clay and ir.n-fr.e clay fr.ctions of four.subtr.pical soils differ.ng in miner.logy. To this end, the samples wer. supplied with Cr.Ⅲ） nitr.te solutions at pH 4.5 or.5.5. The r.sults of Cr.Ⅲ） adsor.tion fitted to a Fr.undlich equation and the adsor.tion capacity was positively cor.elated with soil or.anic matter.and ir.n oxide contents. The clay fr.ctions adsor.ed mor. Cr.per.unit mass than the bulk soils and the ir.n-fr.e clay fr.ctions. The Cr.Ⅲ） adsor.tion capacity incr.ased with incr.asing soil pH due to mor. char.es on adsor.ing sur.aces. Our.r.sults suggest that the soils r.ch in or.anic matter.and ir.n oxides and having a pH above 4.5 ar. suitable for.application of Cr.Ⅲ）-loaded industr.al wastes.

关键词： adsor.tion capacity envir.nmental contamination ir.n-fr.e clay fr.ctions ir.n oxides point of zer. char.e specificsur.ace ar.a

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A compar.son of honeybee (Apis mellifer.) queen, wor.er.and dr.ne lar.ae by r.A-Seq

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Insect Science 2019年第3期26卷 499-509页

作者： Xu-Jiang He Wu-Jun Jiang Mi Zhou andrew B. barron Zhi-Jiang Zeng Honeybee r.sear.h Institute Jiangxi Agricultural University Nanchang China Biomar.er.Technologies Co. Ltd. Beijing China 2Depar.ment of Biological Sciences Macquarie University North Ryde NSW Australia

Honeybees (Apis mellifer.) have haplodiploid sex deter.ination: males develop fr.m unfer.ilized eggs and females develop fr.m fer.ilized ones. The differ.nces in lar.al food also deter.ine the development of females. Her. we compar.d the total somatic gene expr.ssion pr.files of 2-day and 4-day-old dr.ne, queen and wor.er.lar.ae by r.ASeq. The r.sults fr.m a co-expr.ssion networ. analysis on all expr.ssed genes showed that 2-day-old dr.ne and wor.er.lar.ae wer. closer.in gene expr.ssion pr.files than 2-day-old queen lar.ae. This indicated that for.young lar.ae (2-day-old) envir.nmental factor. such as lar.al diet have a gr.ater.effect on gene expr.ssion pr.files than ploidy or.sex deter.ination. Dr.nes had the most distinct gene expr.ssion pr.files at the 4-day lar.al stage, suggesting that haploidy, or.sex dr.matically affects the gene expr.ssion of honeybee lar.ae. Dr.ne lar.ae showed fewer.differ.nces in gene expr.ssion pr.files at the 2-day and 4-day time points than the wor.er.and queen lar.al compar.sons (598 against 1190 and 1181), suggesting a differ.nt patter. of gene expr.ssion r.gulation dur.ng the lar.al development of haploid males compar.d to diploid females. This study indicates that ear.y in development the queen caste has the most distinct gene expr.ssion pr.file, per.aps r.flecting the ver. r.pid gr.wth and mor.hological specialization of this caste compar.d to wor.er. and dr.nes. Later.in development the haploid male dr.nes have the most distinct gene expr.ssion pr.file, per.aps r.flecting the influence of ploidy or.sex deter.ination on gene expr.ssion.

关键词： caste differ.ntiation envir on mental factor. gene expr.ssion haploid and diploid honeybees lar.al development

A New Phasor.Estimator.for.PMU Applications:P Class and M Class

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Jour.al of Moder. Power.Systems and Clean Ener.y 2020年第1期8卷 55-66页

作者： Jose r.r.zo-Her.andez Ar.ur. Mejia-barron David Gr.nados-Lieber.an Mar.in Valtier.a-r.dr.guez Jose F.Gomez-Aguilar ENAP-r.sear.h Gr.up Facultad de IngenieríaUniversidad Autónoma de Querétaro(UAQ)San CayetanoC.P.76807México ENAP-r.sear.h Gr.up Departamento de Ingeniería ElectromecánicaInstituto Tecnológico Superior de Irapuato(ITESI)Colonia El CopalC.P.36821México CONACyT-Centr. Nacional de Investigación y Desar.ollo Tecnológico(CENIDET) Tecnológico Nacional de MéxicoInterior Internado Palmira S/NCol.PalmiraC.P.62490México

Phasor.measur.ment units(PMUs)ar. fundamental tools in the applications of moder. power.systems,wher. synchr.nized phasor.estimations ar. *** accur.cy and dynamic per.or.ance r.quir.ments for.phasor.fr.quency,and r.te of change of fr.quency(r.COF)estimations ar. established in the IEEE Std.C37.118.1-2011 along with the IEEE Std.C37.118.1 a-2014,wher. two PMU per.or.ances ar. suggested:P class filter. for.applications r.quir.ng fast r.sponse and M class filter. for.applications r.quir.ng high r.jection to aliased *** this paper.a methodology to design new phasor.estimator. that satisfy the P class and M class r.quir.ments in PMUs is *** pr.posed methodology is based on finite impulse r.sponse filter.,br.ck-wall filter.,and complex filter.design concepts,wher. fr.quency r.nge,time per.or.ance,har.onic r.jection and out-of-band inter.er.nce r.quir.ments ar. consider.d in its design.A compar.tive analysis using the r.fer.nce model given by the IEEE Std.C37.118.1 is *** r.sults show the effectiveness of the phasor.estimator. under.steady-state and dynamic conditions accor.ing to the PMU standar.,making them suitable tools for.applications in power.systems.

关键词： Br.ck-wall filter complex filter IEEE Std.C37.118.1 M class P class phasor measur.ment unit(PMU) phasor estimator

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Updating digital elevation models via change detection and fusion of human and r.mote sensor.data in ur.an envir.nments

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Inter.ational Jour.al of Digital Ear.h 2015年第2期8卷 153-171页

作者： Car.lin Klonner.Chr.stopher.barron Pascal Neis Ber.har. Hofle Depar.ment of Geogr.phy University of HeidelbergHeidelbergGermany

OpenStr.etMap(OSM)cur.ently r.pr.sents the most popular.pr.ject of Volunteer.d Geogr.phic Infor.ation(VGI):geodata ar. collected by common people and made available for.public *** Laser.Scanning(ALS)enables the acquisition of high-r.solution digital elevation models that ar. used for.many *** study combines the advantages of both ALS and OSM,offer.ng a pr.mising new appr.ach that enhances data quality and allows change detection:the mainly up-to-date 2D data of OSM can be combined with the high-r.solution–but r.r.ly updated–elevation infor.ation pr.vided by *** case study investigates building objects of OSM and ALS data of the city of Br.genz,*** quality of OSM is discer.ed by the compar.son of building footpr.nts using differ.nt tr.e positive definitions(*** ar.a).High quality of OSM data is r.vealed,yet also limitations of each method with r.spect to heter.geneous r.gions and building outlines ar. *** the fir.t time,an up-to-date Digital Sur.ace Model(DSM)combining 2D OSM and ALS data is achieved.A multitude of applications such as flood simulations and solar.potential assessments can dir.ctly benefit fr.m this data combination,since their.value and r.liability str.ngly depend on an up-to-date DSM.

关键词： OpenStr.etMap air.or.e laser.scanning change detection 3D modelling up-to-date digital sur.ace models

Par.icle image velocimetr. evaluation of flow-alter.ng counter.easur.s for.local scour.ar.und a submer.ed cir.ular.cylinder

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Inter.ational Jour.al of Sediment r.sear.h 2022年第4期37卷 411-423页

作者： Pr.scilla Williams r.m Balachandar.Vesselina r.ussinova r.nald barron Depar.ment of Civil and Envir.nmental Engineer.ng University of Windsor Depar.ment of Mechanical Automotive and Materials EngineeringUniversity of Windsor Depar.ment of Mathematics and Statistics University of Windsor

The effect of scour.counter.easur.s on the mechanism of local scour.ar.und a cylinder.r.quir.s clar.fication in or.er.to develop design methodology for.use in pr.ctice. Pr.vious investigations on counter.easur. per.or.ance, though useful, have not pr.vided adequate measur.ments to suppor. this under.tanding. In the pr.sent investigation, par.icle image velocimetr.(PIV) measur.ments wer. acquir.d at sever.l str.amwise-ver.ical planes in the flow field sur.ounding a submer.ed cir.ular.cylinder.with a ver.ical splitter.plate and with a r.ctangular.collar.a hor.zontal base plate). Analysis of the distr.bution of mean str.amwise velocity and r.ynolds shear.str.ss as well as the scour.for.ation indicated that the splitter.plate disr.pted shear.layer.inter.ction in the wake r.gion, r.ducing the width of scour.downstr.am of the cylinder.by 3%. The collar.eliminated scour.upstr.am of the cylinder.entir.ly by pr.viding pr.tection at the sides of the cylinder.wher. the shear.str.ss exceeds the cr.tical bed shear.str.ss, and the str.amwise velocity distr.bution in the r.gion between the cylinder.and the channel sidewall indicated that installation of a r.ctangular.collar.causes flow separ.tion at a point fur.her.upstr.am on the cylinder.sur.ace.

关键词： Scour.and er.sion Local scour Pier.scour Scour.counter.easur.s Hydr.ulic modelling Par.icle image velocimetr. (PIV)