简介:Thestabilityofthethinliquidfilminacapillaryisimportanttothephase-changeheattransferprocessinminiatureofmicrostructures.Fromthebasicequationsformotionandheattransferattheinterfaceofthefilm,itsstabilityistheoreticallystudied.Withevaluationoftheeffectsandrelativemagnitudesofvariousdrivingforcesandwiththeuseoflong-wavetheoryinadditiontolinearstabilityanalysis,thecontrollingequationsaresimplifiedandanevolutionequationforthefilm'sthicknessisobtained.Detailedanalysisontheevolutionequationshowsthatinstabilityoccursfirstinthemeniscusregionandtheinstabilityconditionvarieswithboundaryconditions,geometricalscalesandthermalproperties.Thenumericalresultsagreewellwithearlieroneswithsomefavorableextensionsandimprovements.
简介:Thedriftingbaselinesofcapillaryelectrophoresisaffecttheveracityofanalysisgreatly.ThispaperpresentsThresholdFittingTechnique(TFT)soastosubtractthebaselinesfromtheoriginalsignalsandemendatethesignals.InTFT,waveletandcurvefittingtechniqueareappliedsynthetically,thresholdsaredecidedbythecomputerautomatically.ManyexperimentsofsignalprocessingindicatethatTFTissimpleforbeingused,therearefewman-inducedfactors,andtheresultsaresatisfactory.TFTcanbeappliedfornoisysignalswithoutanypre-processing.
简介:Anovelpressurizedcapillaryelectrochromatography(PCEC)wasdevelopedtoseparatebaxicdrugsonstrongcationexchange(SCX)column.TheseparationresultbyusingPCECwasbetterthanthatbyusingmicro-HPLC.Theeffectsofelectricalfieldandpressureonplateheightandresolutionwereinvestigated.Influencesoforganicmodifier,ionicstrengthandpHvalueofbufferonretentionbehaviorwereevaluated,andtheseparationmechanismwasalsodiscussed.
简介:Wereportacaseofcapillaryhemangiomsathatinvolvedtheentiremiddleearspace,externalauditorycanal(EAC)andtympanicantrum.Symptomsinthecaseincludedearfullness,hearingloss,otalgiaandotorrhea.Thecasewasmisdiagnosedasrecurrentchronicotitismediawithgranulationpreoperatively.Adiagnosisofcapillaryhemangiomawasestablishedbypostoperativehistologicalexamination.Themanagementofcapillaryhemangiomaofthemiddleearandexternalauditorycanalisdiscussed,withareviewoftheliterature.Becauseofitsvariableandsometimesmisleadingclinicalpresentation,hemangiomacaninitiallybemisdiagnosedasotherlesions.Therefore,ahighindexofsuspicionisnecessaryforearlyandaccuratediagnosis.
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.
简介:Thenonlinearcapillary-gravitywaveproducedbyaverticallyoscillatingplate,inwhichthecontact-anglemodelisconsidered,isstudiedbyuseoftheBoundaryIntegralEquationMethod(BIEM).Thepresentnumericalexperimentshowsthatthecodeisrobustandefficientformodelingthegenerationandpropagationofcapillary-gravitywaves.Itisfoundthatthewaveheightsofstationaryperiodicnonlinearwavesradiatedawayfromtheplatearedependentontheparametersinvolvedinthecontact-an-glemodel.Theeffectofthecontact-anglehysteresisandthenonlinearityofcapillary-gravitywavesonthewaveprofileisdiscussedinthepaper.
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。
简介:Closed-celltypebarrierribssuchasmeander,honeycomb,SDR,andwaffletypeswereproducedusingcapillarymoldingprocess.SinteringoftheribsrevealedthattheribswithasymmetricgeometrysuchasmeanderandSDRtypebecamedistortedseverelybythesinteringprocess,buttheribswithsymmetricgeometrysuchashoneycombandwaffletypemaintainedtheirgreenstatemorphology.Aftersintering,theribswerecoatedwithgreenphosphorusingosmosiscoatingprocessanditsluminancecharacteristicswereevaluated.Theresultsindicatedthattheluminanceanditsefficiencyisimprovedbyusingclosed-celltyperibswiththenewphosphorformingtechnology.
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.
简介:Theoriginofpseudopeakwasstudiedbymeansofmicellarelectrokineticcapillarychromatographywithcetyltrimethylaminiumbromideasthepseudostationaryphase.Ithasbeenpointedthattwopeaksmayappearforonecomponentundercertainconditions.Experimentsshowedthattherelativeareasofthetwopeaksofanalytedependedonthetimeandthetemperatureofreactionbetweenanalyteandsurfactant,andtheconcentrationofsurfactantinthesamplesolution.Itmeansthattheinteractionbetweentheanalyteandthesurfactantisaslowprocess,andastablesubstancecanbeproducedfromtheinteraction.Itisthesubstanceandtheanalytethatmayleadtotheformationoftwopeaks.Thefastinteractionmechanismbetweenthesoluteandthemicellarshouldbequeriedfromtheexperimentresult.