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194 个结果
  • 简介:Thestructureandkineticsofthecomplexformedbyhyaluronicacid(HA)andpoly(L-lysine)(PLL)werestudiedbytimeresolvedlaserlightscattering,TEM,andAFM.BecauseHAhasahydrophilicbackbone,thecomplexesformedbyHAandPLLaredifferentfromthoseformedbyoppositelychargedpolyelectrolytesbothhavinghydrophobicbackbones.Insteadofformingstrongaggregatesandevenprecipitates,thecomplexinthepresenceofexcessHAisstableinthestudiedtimeperiod.Moreimportantly,thecomplexspontaneouslyformscore-coronastructurebytherearrangementofHAchains.ThecoreiscomposedofcomplexrichofPLLandthecoronaismainlyHA.FurtheranalysisshowsthatthehydrogenbondformedbyHAcreatesabarrierhinderingthefurtherrelaxationofHAchains.Theautomaticformationofcore-coronastructurebyPLL/HAishelpfulnotonlytounderstandtherelaxationofpolyelectrolyteincomplex,butalsotodevelopdrugcarrierswithdesirableproperties.

  • 标签: POLYELECTROLYTE complex Core-corona STRUCTURE Hyaluronic acid
  • 简介:丰田光冠这个车名对不少中国车迷来说可能有些陌生,国内汽车媒体常常会提到皇冠、花冠,但光冠就很少能看见了。丰田光冠究竟是怎么样的一款车?对国人来说最容易明白的介绍,可能就是光冠是蓝鸟的世仇。而对于日本车迷来说,半个世纪前如火如荼的"BC战争"更是一段佳话。BC战争的B就是蓝鸟Bluebird,C则是光冠Corona

  • 标签: TOYOTA 车迷 丰田 蓝鸟 战争 皇冠
  • 简介:Modelingofcarbonmonoxide(CO)removalbyacoronaplasmawasconductedinthisstudy.ThepurificationefficiencyofCOwascalculatedtheoreticallyandthefactorsaffectingtheremovalofCOwereanalyzed.TheresultsshowedthatthemainremovalmechanismsofCOweredirectdissociationbygeneratedhigh-energyelectronsandindirectoxidationbygeneratedhydroxylradicals.ThepurificationefficiencyofCOwasdependentontheplasmaparameters,indoorairhumidityandinitialconcentrationofCO.Goodconsistencybetweenthetheoreticalcalculationandtheexperimentalresultswasobserved.

  • 标签: 等离子体参数 一氧化碳 建模 二氧化碳 净化效率 计算理论
  • 简介:Objective:Toprovidedetailedinformationofcoronamortisforilioinguinalapproachasananteriorapproachtotheacetabulumandpelvis.Methods:Thecourse,branchesanddistributionofthevascularconnectionbetweentheobturatorsystemandtheexternaliliacorinferiorepigastricsystemslocatedoverthesuperiorpubicramuswereobservedon50hemipelviseswithintactsofttissues.Results:Duringthedissections,72%ofthecadavericsideshadatleastonecommunicatingvesselbetweentheobturatorsystemandtheexternaliliacorinferiorepigastricsystemsonthesuperiorpubicramus.Theaveragediameteroftheconnectingvesselwas2.6mm(range,2.0-4.2mm).Itcoursedoverthesuperiorpubicramusoriliopubiceminenceverticallytoentertheobturatorforamenandexitthepelvis.Theaveragedistancefrompubicsymphysistothevascularconnectionsbetweentheobturatorandexternaliliacsystemswas52mm(range,38-68mm).Conclusions:Vascularconnectionsbetweentheobturatorsystemandtheexternaliliacorinferiorepigastricsystemswerefoundoverthesuperiorpubicramuswithahighincidence.Theyarepronetodamageduringtheilioinguinalapproachasananteriorapproachtotheacetabulumandpelvis.Thus,coronamortislocatedoverthesuperiorpubicramusdeservesgreatattentionduringtheilioinguinalapproach.

  • 标签: 髋臼手术 冠状部 骨盆手术 应用解剖学 手术入路
  • 简介:FormerlyagreatempirebuthavingsufferedalongperiodofoppressionbyWesternimperialistsafter1840,Chinaisverysensitiveaboutitsautonomy.CurrentlyseparatedfromthemodernworldorderdominatedbytheWest,Chinaneedstointegrateitselfintothis.So,thecoreproblemofChinesediplomacyisfindingabalancebetweenintegratingChinaintothemodernworldorderandmaintainingitsautonomy.Withinthisframework,IputforwardanewinterpretationofChineseforeignpolicysince1949.

  • 标签: 国外 对中 外交政策 中国 自主性 西方
  • 简介:大家都知道,RedHat一般6~8个月就推出一个新版本的Linux发行版,然而RedHat谜们等待了N个月都没有等到期待已久的RedHatLinux10。不过心细的朋友可能会发现,RedHat2003年11月6日就在其网站上提供一个名为Fedora的Linux发行版(代号为Yarrow)的下载(http://fedora.redhat.com/download)。那么这个Fedora究竟和

  • 标签: REDHAT LINUX 桌面系统 FedoraCore1 功能 使用方法
  • 简介:AbstractMost of the medical and nonmedical research labs, all around the world, are racing against time to produce an effective vaccine or an antiviral medicine for coronavirus disease 2019 (COVID-19). Conventional medicines and novel nano-materials including chemical and herbal-based compounds are all into positive trials toward coronaviruses and other pandemic infections. Among them, natural immune boosters have attracted physicians because of their longevity and reliability for fewer side effects. This is a review article with a detailed picture of an unexplored antiviral source with maximum potency in curing viral infections. Cyanobacteriae have been known for centuries and are rich in secondary metabolites of proteins, biopeptides, and polysaccharides for prominent antiviral action against chest infections. But detailed exploratory research is required to purify, scale-up, and commercialize the pharmacologically active agents from these drug reserves.

  • 标签: antiviral drugs coronavirus covid-19 cyanobacteria
  • 简介:Radiointerference(RI),asanaftereffectofcoronadischarge,isanimportantresearchtopicinthefieldofelectromagneticcompatibility,whereexcitationfunctionisappliedbroadlytothepredictionofRIlevel.ThispaperpresentsthetheoryofexcitationfunctionmethodusedintheRIlevelprediction.Then,somepracticalproblemsrelatedtothismethodarediscussed.Thepropagationprocedureofcoronacurrentissolvedbythephase-modaltransformation,andtheimpedancematrixofmultitransmissionlinesiscalculatedbyadoublelogarithmicapproximatemodelofCarson'sGround-Returnimpedance.Atthesametime,inordertocalculatetheRIlevelwhentotallinecoronaisassumed,ananalyticalformulaisdeducedforintegraloperation.Basedontheabovesolutions,analgorithmispresentedandappliedtothepredictionofRIlevelofapracticaloverheadtransmissionline.Comparisonofpredictionandmeasurementresultsindicatesthatthealgorithmproposedinthispaperiseffectiveandfeasible.

  • 标签: 电晕放电 预测 激励 应用 架空输电线路
  • 简介:Anexperimentandanalysisonremovalofgaseousbenzenebypulsecoronainducedplasmaispresentedinthisarticle.Importantparameterseffectingremovalefficiencyhavebeeninvestigated,suchaspulsepeakvoltage,pulsefrequency,gasinletconcentration,gasflowrateandreactortemperature.Theresultshowsthattheremovalefficiencyincreaseswiththeincreaseinpulsepeakvoltage,pulsefrequencyandreactortemperature,butdecreasesintheriseofgasinletconcentrationandgasflowrate.OntheconditionofVp=36kV,f=80Hz,C=1440mg/m^3andQ=640ml/min,thelargestremovalefficiencyis98%.Finally,thereactedproductsarequalitativelyanalysedandthereactionprocessesarededucedincombinationwithplasma-chemistrytheory.

  • 标签: 射流等离子体 气态苯处理 挥发性化合物 等离子体反应器
  • 简介:Theinvestigationofelectrochromiceffectofcorona-polednonlinearopticalpolymerfilmsisaneffectivemethodfortheestimationofpolinglevelandtheselectionofpolingconditions.ThepolingelectricfieldEpandorientationalorderparameterΦ,whicharetheimportantparameterstopredictd33ofpoledfilms,canbecalculatedbyasimpleoperationfromthenumberofredshiftofchargetransferabsorptionband.Thecalculatedresultsareingoodagreementwiththeexperimentaldata.

  • 标签: Nonlinear optical POLYMER POLING Corona-poled film
  • 简介:Inthiswork,wesimulatenumericallythethermaleffectsinnitrogenatatmosphericpressurecausedbyanegativecoronaDCdischargeoflowcurrent.Amathematicalfunctionthatsimulatestheinjectionofthethermaltransferingasisproposed.Thesimulateddischargeisofanegativepointtoplanemasstype,withaninterelectrodedistanceof12mmandasymmetryabouttheaxisofdischarge.Thespatialandtemporalevolutionofneutralsisanalyzedbasedupontheequationsofcontinuity,momentumandenergyinacylindricalgeometry.Forthegeometryofthesystem,theFCT(fluxcorrectedtransport)procedurewasadopted.

  • 标签: 负电晕放电 数值模拟 热效应 几何形状 连续性方程
  • 简介:Atransformertypeironcoresnubber,asaprotectivedeviceagainstthestraycapacitanceduringthebreakdowninEAST,isanalyzedindetail.Threekindsoftopologyarepresented.Thenwiththeanalysisforequivalentcircuit,therangesofthreekeyparameters,i.e.,secondarysideresistance,leakageinductanceandsnubberinductance,aredetermined.Byconsideringthesaturationofthemagneticmaterial,adesignprincipleisalsopresented.Anearly1:10coresnubberistested.Itisprovedthatahighpermeabilitycorewithsecondaryresistorcanrestrainthedischargecurrenteffectively.

  • 标签: 设计模型 缓冲 NBI 华东 铁心变压器 保护装置
  • 简介:Asamaincomponentofinternationalhumanrightsdocuments,theUnitedNationscorehumanrightsconventionsshowobviousformalandsubstancecommonalities.TheformalcommonalitiesconsistintheirbeingadoptedbyUNGeneralAssemblyandtheirsimilarityinstructure,subjectsandsystems.Theircommonalitiesinsubstanceincludethesimilarityofcontents,thehomogeneityoftheproceduralmechanismsandthecomplementarynatureoftheirnormativeinterpretation.ThecommonalitiesamongtheUN’scorehumanrightstreatiesistheinevitablerequirementoftheuniversalityandwholenessofhumanrights.

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  • 简介:为了与僵硬学习负担转移机制和混合堆积的适用的能力,核心(MPSC)被插入预制增强的具体堆积(PRCP)形成,在原处测试与不同长度,直径,水水泥比率和PRCP包含MPSC,水泥混合了堆积,并且钻洞堆积,被执行。限制适用的能力,负担解决曲线和MPSC的压力分发,混合堆积被获得。在水泥土壤和PRCP之间的负担转移被有限元素方法分析(女性)。测试结果和女性的分析证明MPSC充分从从外部顶装进转移内部水泥的PRCP的混合堆积和高压缩强度玷污的水泥利用了大磨擦,并且那插入进混合堆积的PRCP改变混合堆积的压力分发并且改进在混合堆积和土壤之间的摩擦抵抗。长度和MPSC的节区域onPRCP两个都有最佳价值。采用MPSC在改进软土壤地面的适用的能力是有效的。

  • 标签: 刚性核 MPSC 混合堆 土木工程 挤压土壤效应 承载能力
  • 简介:Core-shellstructurednanosphereswithmesoporoussilicashellandNicore(denotedasNi@meso-SiO2)arepreparedthroughathree-stepprocess.MonodispersedNiprecursorsarefirstprepared,andthencoatedwithmesoporousSiO2.FinalNi@meso-SiO2spheresareobtainedaftercalcination.TheproductsarecharacterizedbyX-raypowderdiffraction,transmissionelectronmicroscopyandN2adsorption-desorptionmethods.Thesesphereshaveahighsurfaceareaandarewelldispersedinwater,showingahighcatalyticactivitywithaTOFvalueof18.5,andoutstandingstabilityinhydrolyticdehydrogenationofammoniaboraneatroomtemperature.

  • 标签: heterogeneous catalysis nickel hydrogen AMMONIA BORANE
  • 简介:AdustsedimentlayerwasfoundontheoutertubewallwhentheESCP(electrostaticcentrifugalprecipitator)trappeddieselparticulatesorganistersand.TheComptonbackscattermethodwasusedtomeasurethesedimentthicknessduringtheexperiment.Theeffectoftheinletgasvelocityonthedustsedimentlayerwasinvestigated.PIV(ParticleImageVelocimetry)wasusedtomeasurethevelocityfieldbetweentheinnerbarbtubewallandtheoutertubewall.Experimentsshowedthatthethicknessofthesedimentincreasedwithtime,andthesedimentlayeratthelowerendwasmuchthickerthanthatattheupperend.Theagglomerationontheoutertubewallcouldberemovedwhentheinletgasvelocitywasincreasedtoacertainvalue.

  • 标签: 电晕等离子体 旋风收尘器 康普顿反向散射法 气体速度 灰尘沉积层