学科分类
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35 个结果
  • 简介:Thestabilityofthethinliquidfilminacapillaryisimportanttothephase-changeheattransferprocessinminiatureofmicrostructures.Fromthebasicequationsformotionandheattransferattheinterfaceofthefilm,itsstabilityistheoreticallystudied.Withevaluationoftheeffectsandrelativemagnitudesofvariousdrivingforcesandwiththeuseoflong-wavetheoryinadditiontolinearstabilityanalysis,thecontrollingequationsaresimplifiedandanevolutionequationforthefilm'sthicknessisobtained.Detailedanalysisontheevolutionequationshowsthatinstabilityoccursfirstinthemeniscusregionandtheinstabilityconditionvarieswithboundaryconditions,geometricalscalesandthermalproperties.Thenumericalresultsagreewellwithearlieroneswithsomefavorableextensionsandimprovements.

  • 标签: 相变 毛细管 液体薄膜 稳定性
  • 简介:Thedriftingbaselinesofcapillaryelectrophoresisaffecttheveracityofanalysisgreatly.ThispaperpresentsThresholdFittingTechnique(TFT)soastosubtractthebaselinesfromtheoriginalsignalsandemendatethesignals.InTFT,waveletandcurvefittingtechniqueareappliedsynthetically,thresholdsaredecidedbythecomputerautomatically.ManyexperimentsofsignalprocessingindicatethatTFTissimpleforbeingused,therearefewman-inducedfactors,andtheresultsaresatisfactory.TFTcanbeappliedfornoisysignalswithoutanypre-processing.

  • 标签: 减法技术 毛细管电泳 曲线拟合 极限拟合 基线
  • 简介:Anovelpressurizedcapillaryelectrochromatography(PCEC)wasdevelopedtoseparatebaxicdrugsonstrongcationexchange(SCX)column.TheseparationresultbyusingPCECwasbetterthanthatbyusingmicro-HPLC.Theeffectsofelectricalfieldandpressureonplateheightandresolutionwereinvestigated.Influencesoforganicmodifier,ionicstrengthandpHvalueofbufferonretentionbehaviorwereevaluated,andtheseparationmechanismwasalsodiscussed.

  • 标签: 麻醉药 分离 阳离子交换柱 加压毛细管电色谱
  • 简介:有electrochemiluminescence察觉的新、简单的毛状的电气泳动为分离和一双diastereoisomeric碱(麻黄素和pseudoephedrine)的quantification被开发。察觉的限制(S/N=3)4.5是?????????€牂????€??€午???丠??

  • 标签: 化学发光检测 毛细管电泳 生物碱 人尿 伪麻黄碱 测定
  • 简介:Wereportacaseofcapillaryhemangiomsathatinvolvedtheentiremiddleearspace,externalauditorycanal(EAC)andtympanicantrum.Symptomsinthecaseincludedearfullness,hearingloss,otalgiaandotorrhea.Thecasewasmisdiagnosedasrecurrentchronicotitismediawithgranulationpreoperatively.Adiagnosisofcapillaryhemangiomawasestablishedbypostoperativehistologicalexamination.Themanagementofcapillaryhemangiomaofthemiddleearandexternalauditorycanalisdiscussed,withareviewoftheliterature.Becauseofitsvariableandsometimesmisleadingclinicalpresentation,hemangiomacaninitiallybemisdiagnosedasotherlesions.Therefore,ahighindexofsuspicionisnecessaryforearlyandaccuratediagnosis.

  • 标签: MIDDLE EAR clinical PRESENTATION MIDDLE EAR
  • 简介:Fouradditives,[4-hydroxy-3-nitrophenylarsonicacid(Roxarsone),4-nitrophenylarsonicacid(4-NPAA),phenylarsonicacid(PAA)andp-aminophenylarsonicacid(p-ASA)]inchickenfeedweresimultaneouslydeterminatedbycapillaryzoneelectrophoresis(CZE)withon-lineUV-detection.Basedonourpreviousresearch,thesampleextraction,cleanupanddetectionconditionwerediscussedandoptimised,Analyteswereextractedwithacidic20%acetonitrileandthecleanedupwithC18SPEbeforethedetection.20mMCarbonatebufferatpH10wasusedaselectrolyte,Afusedsilicacapillary(48.5cmx75um),18kVworkingvoltageand200nmdetectionwavelengthwereappliedforCEdetection.AcetonitrilefunctionedasamodifiertoreducetheconductivityofthesamplesoulutionduringtheCEseparation.ThesensityvityofthemethodissufficientfortheroutineinspectionofRoxarsoneinanimalfeed,TherecoveriesforallanalyteswerereasonablygoodbuttheprecisionofthemethodwaspoorerthanHPLC.

  • 标签: 动物饲料 添加剂 同时测定 毛细管电泳分析
  • 简介:Thenonlinearcapillary-gravitywaveproducedbyaverticallyoscillatingplate,inwhichthecontact-anglemodelisconsidered,isstudiedbyuseoftheBoundaryIntegralEquationMethod(BIEM).Thepresentnumericalexperimentshowsthatthecodeisrobustandefficientformodelingthegenerationandpropagationofcapillary-gravitywaves.Itisfoundthatthewaveheightsofstationaryperiodicnonlinearwavesradiatedawayfromtheplatearedependentontheparametersinvolvedinthecontact-an-glemodel.Theeffectofthecontact-anglehysteresisandthenonlinearityofcapillary-gravitywavesonthewaveprofileisdiscussedinthepaper.

  • 标签: BOUNDARY INTEGRAL Equation Method NONLINEAR capillary-gravity
  • 简介:Graphene氧化物(去)由于它的唯一的性质和潜在的应用吸引了广泛的注意。这里,我们报导调查去是的nanosheets为毛状的气体的一个静止阶段色析法(GC)分离。GO列,由一条新一步舞涂层途径制作了,308的显示出的平均McReynolds常数,建议GC静止阶段的中等极的性质。GO静止阶段与好山峰形状为不同类型的analytes完成好分离,特别为结合Hanalytes,例如白酒和胺。不同保留行为变静止从常规静止阶段的阶段可以从它和analytes的多重相互作用发源,包含结合H,dipole–dipole,–叠并且散相互作用。而且,去列与相对标准差(RSD%)显示出好分离重制度不到0.24%(n ;= ;5)在analytes的保留时间。

  • 标签: 气相色谱固定相 毛细管气相色谱法 分离性能 氧化石墨 相对标准偏差 相互作用
  • 简介:Closed-celltypebarrierribssuchasmeander,honeycomb,SDR,andwaffletypeswereproducedusingcapillarymoldingprocess.SinteringoftheribsrevealedthattheribswithasymmetricgeometrysuchasmeanderandSDRtypebecamedistortedseverelybythesinteringprocess,buttheribswithsymmetricgeometrysuchashoneycombandwaffletypemaintainedtheirgreenstatemorphology.Aftersintering,theribswerecoatedwithgreenphosphorusingosmosiscoatingprocessanditsluminancecharacteristicswereevaluated.Theresultsindicatedthattheluminanceanditsefficiencyisimprovedbyusingclosed-celltyperibswiththenewphosphorformingtechnology.

  • 标签: PDP CLOSE celled BARRIER RIBS SINTERING
  • 简介:包括毛状的力量和毛状的吸,毛状的相互作用在有固定液体体积的二个不相等尺寸的粒子之间被调查。毛状的相互作用模型在Young-Laplace框架以内被使用。与液体桥,毛状的吸,和象州的变量的液体卷的顶点的侧面,有二定点的边界的管理方程首先用一种可变替换技术,严肃效果在被忽视被导出。有固定体积的液体桥的毛状的吸和几何学与一个射击方法被解决。在为毛状的力量建模,峡方法被使用。包括在二个粒子,粒子半径的比率,和液体固体之间的距离的各种各样的参数的效果联系角度被讨论。

  • 标签: 液体桥牌 Young-Laplace 方程 固定液体体积 射击方法 O363.2 76B45
  • 简介:高温度液体被注入微尺寸毛状并且它的轻繁殖行为被调查。我们集中于抽方法的二不同液体。第一个方法能把高温度液体听输入微尺寸由使用一个高压力差别系统毛状。在抽以后,与光搬运人一起连接的单个模式纤维(SMF)基于微波interferometry(OCMI)系统被用来测量不同液体听层次在微尺寸毛状。第二个方法能把房间温度引擎油输入由使用注射泵毛状。当液体被输入时,这个方法能避免空气水泡毛状。

  • 标签: 高温液体 毛细管 微尺度 光传输 差分系统 微波干涉仪
  • 简介:Insufficientgrowthandrarefactionofcapillaries,followedbyendothelialdysfunctionmayrepresentoneofthemostcriticalmechanismsinvolvedinheartdamage.Inthisstudyweexaminedhistochemicalandultrastructuralchangesinmyocardialcapillaryendotheliumintwomodelsofheartfailurestreptozotocin-induceddiabetesmellitus(STZ)andNOdeficienthypertensioninmaleWistarrats.Diabeteswasinducedbyasinglei.v.doseofSTZ(45mg/kg)andchronic9-weekstagewasanalysed.ToinduceNO-deficienthypertension,animalsweretreatedwithinhibitorofNOsynthaseLnitroargininemethylester(L-NAME)(40mg/kg)for4weeks.Leftventriculartissuewasprocessedforenzymecatalytichistochemistryofcapillaryalkalinephosphatase(AlPh),dipeptidylpeptidaseⅣ(DPPⅣ),andendothelialNOsynthase/NADPH-diaphorase(NOS)andforultrastructuralanalysis.Indiabeticandhypertensiverats,lower/absentAlPhandDPPⅣactivitieswerefoundinfocalmicro-areas.NOSactivitywassignificantlyreducedandpersistedonlylocally.QuantitativeevaluationdemonstratedreductionofreactionproductintensityofAlPh,DPPandNOSby49.50%,74.36%,20.05%indiabeticand62.93%,82.71%,37.65%inhypertensiverats.Subcellularalterationsofendothelialcellswerefoundinheartofbothgroupssuggestinginjuryofcapillaryfunctionaswellascompensatoryprocesses.Endothelialinjurywasmoresignificantindiabeticanimals,incontrasttheadaptationwasmoreevidentinhypertensiveones.Concluding:bothSTZ-induceddiabetes-andNO-deficienthypertension-relatedcardiomyopathywereaccompaniedbysimilarfeaturesofstructuralremodellingofcardiaccapillarynetworkmanifestedasangiogenesisandangiopathy.Thelatterwashowever,predominantandmayacceleratedisappearanceofcapillaryendotheliumcontributingtomyocardialdysfunction.

  • 标签: 超微结构 组织化学 小鼠 心肌疾病 毛细血管 糖尿病
  • 简介:Theoriginofpseudopeakwasstudiedbymeansofmicellarelectrokineticcapillarychromatographywithcetyltrimethylaminiumbromideasthepseudostationaryphase.Ithasbeenpointedthattwopeaksmayappearforonecomponentundercertainconditions.Experimentsshowedthattherelativeareasofthetwopeaksofanalytedependedonthetimeandthetemperatureofreactionbetweenanalyteandsurfactant,andtheconcentrationofsurfactantinthesamplesolution.Itmeansthattheinteractionbetweentheanalyteandthesurfactantisaslowprocess,andastablesubstancecanbeproducedfromtheinteraction.Itisthesubstanceandtheanalytethatmayleadtotheformationoftwopeaks.Thefastinteractionmechanismbetweenthesoluteandthemicellarshouldbequeriedfromtheexperimentresult.

  • 标签: 毛细管色谱 表面活性剂 动力学 色谱峰 假峰