学科分类
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39 个结果
  • 简介:Aseriesofmodifiedpoly(methylmethacrylate,PMMA)resinswerepreparedandcomparedtheiradsorptionabilitiestoendotoxin.Theresultsshowedthatadsorbents,whichweregraftedwithtertiaryamineandlongspacingarms,hadthebestadsorptioncapacitiesandgoodbloodcompatibility,Itishopefultobeusedasadsorbentinhemoperfusionforclinicalclearanceofendotoxin.Theinfluenceoforiginalconcentrationofendotoxinonadsorptionandtheadsorptionmechanismwerealsoinvestigated.

  • 标签: 吸附剂 内毒素 聚甲基丙烯酸酯 制备 血液灌注 血液相容性
  • 简介:Inthepresentstudythemembranefoulinginmicrofiltrationusedforcellharvestinginadeadendsystemhasbeeninvestigated.experimentalresultswereanalysedintermsofexitingmembranefiltrationmodelsandmembraneresistances.Thecakefiltrationmodel(CFM)andstandardblockingmodel(SBM)havebeenconsideredinthisstudy.Variousmembraneresistancesweredeterminedatdifferentprocessingtime,feedconcentrationandstirringspeed.Resistancestopermeationinthissystemincludefiltermedium,poreblocking,adsorption,cakelayerandconcentrationpolarization.

  • 标签: 微型过滤 薄膜堵塞 流动液体
  • 简介:Non-destructivediagnosticmethodsareveryimportantforbeamadjustmentsandmonitors,especiallywhenthebeamintensityislessthan10~8ppsduringtheheavy-iontreatmentofcancer.NowthediagnosticdevicesofHIFRLcan’tsatisfytherequests,sowedecidetoconstructadetectingsystemoftheresidual-gasbeamprofile~([1,2]).ThesystemusesthePositionSensitiveDetector(PSD)~([3,4])basedonmicrochannelplate(MCP)to

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  • 简介:以便检测casing地上凿穿的损坏,有一个二维的超声的数组的一个声学的成像方法被介绍。数组的每个元素独立地在超声的波浪下面射出,所有元素收到的回响被取样并且在地面表面上传给一台计算机,动态移植方法在此被用来形成一2或在地上凿穿的状况的3-dimensional图象。数字模拟和实验被进行与在数组使用的元素的一个小数字表明高成像精确性。自从在传统的分阶段执行的数组成像使用的延期电路,系统不在这个系统被需要,并且所有数据进程能在地上凿穿在一个扎根的系统,复杂性和系统的卷被完成可以显著地被简化,它对地上凿穿仪器批评。

  • 标签: 声学图象系统 迁移技术 钻孔 独立发声
  • 简介:Thepropertiesofaseriesofphasemeasurementtechniques,includinginterferometry,theHartmann–Shackwavefrontsensor,theknife-edgetechnique,andcoherentdiffractionimaging,aresummarizedandtheirperformanceinhighpowerlaserapplicationsiscompared.Theadvantages,disadvantages,andapplicationrangesofeachtechniquearediscussed.

  • 标签: WAVEFRONT measurement phase RETRIEVAL FOCUS PREDICTION
  • 简介:Aclearlight-yellowsilversolwhichhasthevisiblespectralabsorptionat390nm,whenadsorbedphenylmercaptotetrazole(PMT)ormercaptobenzothiazole(MBT),hasanewabsorptionat510-550nm.ItwasfoundthattheadsorptionofhalideionscompeteswithPMTandMBT.However,halideionshaveacompletelydifferentinfluencefromPMTandMBTonthespectralabsorptionofthesilversol.Thedifferencesmayresultfromthechangeofthepropertiesofthesurfaceofthesilversubcolloidalparticlesandfromthebondformscombiningadsorbateswiththesubstrates.

  • 标签: SILVER adsorbed VISIBLE HALIDE SURFACE AGGLOMERATION
  • 简介:Inthispaper,severalmixtruerulesofsoundvelocityandtheirusefulnessincharacterizingthecomponentsofbiomediumareanalysed.Itispointedoutthatforcharacterizingthecomponentsofbiomedium,therulesarecompatiblewitheachotherundercertainconditions,andtheerrorsbetweeneachruleandrealsoundvelocityarediffferent.Itconcludesthatthereisnogeneralrulesuitableforvariousmediaamongabovementionedrules.

  • 标签: SOUND VELOCITY MIXTURE RULES Biomedium.
  • 简介:Thesynthesisandpropertiesofcarbonxerogelsarebrieflydescribedinthismini-review,emphasizingthemethodsusedfortuningtheirsurfacechemistryandtexturalpropertiesinordertodesignefficientelectrocatalystsforfuelcells.Inparticular,theroleplayedbythesurfacefunctionalgroupsindeterminingtheloading,dispersion,oxidationstateandstabilityofthemetalphasesisaddressed.

  • 标签: 燃料电池 干凝胶 合成 催化剂 表面官能团
  • 简介:AnelectroncyclotronresonanceheatingsystemwillbeconstructedinthenearfutureforECHandECCDinvestigationonHL-2Atokamak.ThenewECRHsystemwillprovideHL-2Awithapowercapabilityof1MWfor1satfrequencyof70GHz.Consequently,itisveryimportanttochooseasuitablegyrotronandsomecomponentsforHL-2AECRHsystem.

  • 标签: 电子回旋加热 电流驱动 核聚变 参数计算 ITER 等离子体
  • 简介:AMaintenanceAnalysisofModulesandApparatusNormallyUsedinNIMInstrumentService¥MaXiaoli;SuHong;XuHaiyingandLiXiaogangAsanimporta...

  • 标签: SERVICE Modul
  • 简介:Inanefforttodevelopbiomaterialstomeetguidedtissueregeneration(GTR)standardsforperiodontaltissuerecovery,ahomogeneousandtransparentchitosan(CS)/hydroxyapatite(HA)membranewithpotentialapplicationsasGTRbarrierinperiodontaltherapyhasbeenpreparedviainsitucompositing.ThemembranehasbeendesignedtohaveasmoothroughasymmetricstructurethatmeetsthedemandforGTR.ComponentandmorphologyofthemembranearecharacterizedbyXRDandSEM.ItcanbeindicatedthatHAwasinsitusynthesizeduniformlyintheCSmembrane.MechanicalexperimentsofthemembraneswithvariousHAcontentsshowthattheirtensilestrengthsareadequateforperiodontaltherapy.Biologicalpropertiesofthemembranehavebeenperformedbycelltoxicityassays,hemolysistestsandanimalexperiments.Resultsindicatethatthemembranehasgoodbiocompatibilityandinductiveeffectforcellgrowth.ThereforethismembranecanbepotentiallyappliedasGTRbarriermembraneforperiodontaltissueregeneration.

  • 标签: 牙周组织再生 羟基磷灰石 合成制备 牙周膜 壳聚糖 导向
  • 简介:Thelargeareaplasticscintillatorfiber(BCF-12)iondetectorarrayismainlymadeof4×108fibers,2×108photo-transmittersand2×108photomultipliertubes.Thefiberwithsinglecladisabout111cmlonganditscrossseetionisasquarewhosesizeis5mm×5mm.Thefibersarearrayedperpendicularlytothedirectionoftheincidentbeam.Eachendsideofeveryfourpiecesoffiberisconnectedtoabendedphoto-transmitter

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  • 简介:PhaseShiftingAndLogicalMoire(PSALM)isakindofcomputerimageprocessingmethodwhichcanbeusedinphasemeasurementandtoobtaintheshape,deformationandstraindistributionofanobject.Thispaperpresentsthestructureandworkingprocedureofa2DphasemeasurementPSALM2Dprogramanditsapplication.Whenanalyzingmoireinterferometricfringes,wecanobtain2Ddistributionofdisplacementandstrain.Whenitisusedinreflectionmoirewecanmeasuretheslopeofaspecimen.SatisfactoryvisualizationandquantitativeresultsaregivenbyPSALM2D.

  • 标签: logical MOIRE phase SHIFTING IMAGE PROCESSING
  • 简介:AhighMwofPLLAwassynthesized,itintendedtobeusedinthemanufactureofbioabsorbablescrewappliedinbonefractureinternalfixation.Theopticalreactionconditionshavebeendiscussed.

  • 标签: 合成 聚左旋乳酸 骨折固定