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186 个结果
  • 简介:在在甲醇的9-vinyladenine和嘧啶库胸腺嘧啶之间的有约束力的机制与紫外可见的spectrophotometric方法被学习。把学习基于这,用象一个模板分子的胸腺嘧啶,是的9-vinyladenine是的新奇功能的单体和diethylene乙二醇dimethacrylate新cross-linker,特定的diethylene乙二醇基于dimethacrylate的分子地印的聚合的膜在纤维素支持上被准备。然后,结果地聚合的膜形态学与扫描电子显微镜学被设想,它的permselectivity作为底层用胸腺嘧啶,uracil,cytosine,腺嘌和guanine被检验。这结果证明印与diethylene乙二醇dimethacrylate准备的聚合的膜比另外的nucleic酸底为模板分子胸腺嘧啶和它的最佳的模拟uracil展出了更高的运输能力。膜也比作为cross-linker与乙烯乙二醇dimethacrylate做的印的膜呈现了更高的permselectivity。包括五nucleic酸的混合物什么时候基于胸腺嘧啶,uracil,cytosine,腺嘌和guanine,通过了diethylene乙二醇基于dimethacrylate的印胸腺嘧啶的聚合的膜,为模板分子胸腺嘧啶和它的最佳的模拟uracil的膜的识别被表明。因为它的高选择,作为cross-linker与diethylene乙二醇dimethacrylate准备的分子地印的膜可能对DNA的绝对hydrolysates的胸腺嘧啶试金或在生物样品的RNA的绝对hydrolysates的uracil试金适用,这被预言。

  • 标签: 乙二醇 选择性 胸腺嘧啶 渗透性 杂环化合物
  • 简介:Thispaperanalyzesnanobridgetestswithconsiderationofadhesivecontactdeformation,whichoccursbetweenaprobetipandatestednanobeam,anddeformationofasubstrateortemplatethatsupportsthetestednanobeam.Analyticaldisplacement-loadrelation,includingadhesivecontactdeformationandsubstratedeformation,ispresentedhereforsmalldeformationofbending.Theanalyticresultsareconfirmedbyfiniteelementanalysis.Ifadhesivecontactdeformationandsubstratedeformationarenotconsideredintheanalysisofnanobridgetestdata,theymightleadtolowervaluesofYoung'smodulusoftestednanobeams.

  • 标签: 测试数据分析 接触变形 试验 有限元分析 弯曲变形 杨氏模量
  • 简介:α-Eleostearicacidandβ-eleostearicacidformedvesiclesinaqueousmediumwhenanethanolsolutionofeleostearicacidwasinjectedrapidlyintoavigorouslyvortexedaqueousphase.Formationofthevesicleswasdemonstratedbyelectronmicroscopicobservationandbromothymolblueencapsulationexperiments.PolymerizationsoftheeleostearicacidsintheformedvesiclescarriedoutbyUVirradiationproducedpoly-α-eleostearicacidandpoly-β-eleostearicacidvesicles.

  • 标签: Eleostearic ACID UV IRRADIATED POLYMERIZATION VESICLE
  • 简介:FluorescencequenchingofjanusgreenB(JGB)insodiumdodecylsulfate(SDS)micellebynucleicacids(DNA)wasstudiedusingUV-visabsorption,steadystatefluorescenceemissionmethodsandlifetimemeasurements.IntheSDSmicelle,weakfluorescenceofJGBwasenhanced,andthemaximumemissionshiftedfrom425to410nm.InthepresenceofDNA,thefluorescenceofJGBwasquenched.Linearrelationshipsbetweenthefluorescencequenching(F0/F)andconcentrationsofDNAwereobservedintherangeof2.4×10^-8to1.08×10^-7mol·L^-1forcalfthymusnucleicacids(ctDNA)and1.9×10^-8to3.8×10^-8mol·L-1forfishspermnucleicacids(fsDNA)when2.5×10^-5mol·L^-1JGBwasemployed.Thelimitdetectionwere1.3×10^-8mol·L^-1forctDNAand6.4×10^-9mol·L^-1forfsDNA.AthighDNAconcentration,therewasasystematicdeviationfromtheStem-Volmerequationduetothestaticanddynamicquenchingoccurringsimultaneously.TheproposedmethodwasappliedtothedeterminationofthenucleicacidsinchickenbloodextractionandtheanalyticalresultswereingoodagreementwiththeUV-method.

  • 标签: 核酸 探测器 DNA 生物技术 烟鲁绿B 十二烷基硫酸钠
  • 简介:Inthispaper,wewillexploretheessenceofthephenomenonthatstatewithlessentanglementmaygenerategreaterBellviolationinthetwo-qubitBelltestswithCH-typeinequalities,i.e.,morenonlocalitywithlessentanglement.Wewillshowthatthisinterestingbutcounterintuitivephenomenoniscausedbytherotationalasymmetryofthenonmaximallyentangledstateinthemeasurementplane.Thisasymmetryallowstheboth-sidedetectionprobabilitiesandtheone-sidedetectionprobabilitiesobtaintheirmaximalvalueswithnonmaximallyentangledstate.ButthemaximalBellviolationmaynotalwayshappenonnonmaximallyentangledstate,becausetheseprobabilitieswillcompetewitheachother,andtheBellviolationbehavesdiferentlyforvariousCH-typeinequalities.

  • 标签: 非最大纠缠态 贝尔 非局域 测试 检测概率 违规现象
  • 简介:Oneofthesub-systemsoftheTrigger/DAQsystemofthefutureATLASexperimentistheOnlineSoftwaresystem.Itencompassesthefunctionalityneededtoconfigure,controlandmonitortheDAQ.ItsarchitectureisbasedonacomponentstructuredescribedintheATLASTrigger/DAQtechnicalproposal.ResularintegrationtestsensureitssmoothoperationintestbeamsetupsduringitsevolutionarydevelopmenttowardsthefinalATLASonlinesystem.Feedbackisreceivedandreturnedintothedevelopmentprocess.Studiesofthesystem.behaviorhavebeenperformedonasetofupto111PCsonaconfigurationwhichisgettingclosertothefinalsize,Largescaleandperformancetestsoftheintegratedsystemwereperformedonthissetupwithemphasisoninvestigatingtheaspectsoftheinter-dependenceofthecomponentsandtheperformanceofthecommunicationsoftware.Ofparticularinterestweretheruncontrolstatetransitionsinvariousconfigurationsoftheruncontrolhierarchy.Forthepurposeofthetests,thesoftwarefromotherTrigger/DAQsub-systemshasbeenemulated.Thispaperpresentsabriefoverviewoftheonlinesystemstructure,itscomponentsandthelargescaleintegrationtestsandtheirresults.

  • 标签: ATLAS实验 软件开发 脱机软件
  • 简介:Thegeometricshapesofspecimensareimportantinimpacttensiletestsbecausegeometricshapesdeterminethestressstatesofthespecimens,andprecisegeometricshapescanobtainpropermaterialpropertieswithoutnon-materialfactors.Theaimofthisstudywastoinvestigatethe1Dformofthestressbychangingthelength-to-diameter(L/D)ratiosofspecimens.TheexperimentswerecarriedoutonasplitHopkinsontensilebar(SHTB)-rotatingdiskindirectbar-bartensileimpactapparatus.TheL/DratiosoftheLY12CZspecimensusedinthetestrangedfrom1to5.ResultsshowthatthespecimenscanbeusedtoobtainexactparametersofmaterialsundertheproposedconditionswhentheL/Dratioisgreaterthan2.Thisisbecausethelongerlengthwillreduceoreliminatetheeffectsoftheinterfaces.

  • 标签: 几何形状 拉伸试验 标本 LY12CZ铝合金 材料特性 应力状态
  • 简介:Inthispaper,someteststatisticsOfKolmogorovtypeandCramervonMisestypebasedonprojectionpursuittechniqueareproposedfortestingthesphericityproblemofahigh-dimensionaldistribution.Thelimitingdistributionsoftheteststatisticsarederivedunderthenullhypothesis.TheasymptoticpropertiesofBootstrapapproximationareinvestigatedandthetailbehaviorsofthestatisticsarestudied.

  • 标签: 椭圆 对称性 渐进线 统计学
  • 简介:Acomparisonoftheadsorptionofbenzoicacidandp-nitrobenzoicacidonthenewhypercrosslinkedpolymericadsorbentAM-I,withthatbymacroporousAmberliteXAD-4,includingtheequilibriumadsorptionisotherms,thedynamicadsorptionbehaviorsthroughcolumnandtheadsorptionthermodynamicswerestudied.ResultsshowthatFreundlichequationgivesafittingadsorptionisotherm.ThespecificsurfaceofAM-lisonly67%ofthatofAmberliteXAD-4,buttheadsorptioncapacitiesonAM-1aremuchhigherabout125%~166%thanthatonAmberliteXAD-4,whichiscontributedtothemicroporemechanismandpolarity.Thenegativevaluesoftheadsorptionenthalpyareindicativeofanexothermicprocess.Enthalpyandfreeenergychangesofadsorptionbothmanifestaphysic-sorptionprocess.Thenegativevaluesoftheadsorptionentropyindicatethattheadsorptioniswellconsistentwiththerestrictedmobilitiesandtheconfigurationsoftheadsorbedbenzoicacidmoleculesonthesurfaceofstudiedadsorbentswithsuperficialheterogeneity.Bothadsorbentswereusedinmini-columnexperimentsforadsorbingbenzoicacidexpectingtoelucidatethehigherbreakthroughadsorptioncapacityofthenewhypercrosslinkedpolymericadsorbentAM-1ascomparedwiththatofAmberliteXAD-4.

  • 标签: 吸附作用 苯甲酸 P-硝基苯甲酸 高交联性苯酚基团Pst吸附剂 热力学性质 分子筛
  • 简介:"Whitepowderytungsticacid"hasbeenusedforpreparingvarioustypesoftungsten-containingcompoundsduetoitshighreactivity.Thepresentpapercoversthestandardmolarenthalpiesofformation,△H0/fofthreetungsten-containingacids.Thevaluesfoundfor"whitepowderytungsticacid"WO3·1.68H2O,"yellowtungsticacid"WO3·1.20H2OanddodecatungstophosphoricacidH3(PW12O40)·25H2Oat298.15Kwere-(1312±1),-(1192±1)and-(18150±13)kJmol-1,respectively.

  • 标签: ENTHALPY of FORMATION Tungstic ACID Dodecatungstophosphoric
  • 简介:Aerodynamicperformanceofthehigh-altitudepropeller,especiallythecounterrotationeffects,isexperimentallystudied.Influencesofdifferentconfigurationsonastratosphericairship,included2-bladecounter-rotatingpropeller(CRP),dual2-bladesinglerotationpropellers(SRPs)and4-bladeSRP,arealsoindicated.Thisresearchindicatesthattheeffectofcounterrotationcangreatlyimprovetheefficiency.ItshowsthattheCRPconfigurationresultsinahigherefficiencythanthedual2-bladeSRPsconfigurationor4-bladeSRPconfigurationunderthesameadvanceratio,andtheCRPconfigurationalsogainsthehighestefficiencywhetherunderthesituationofprovidingthesametrustorabsorbingthesamepower.Itconcludesthat,forastratosphericairship,theCRPconfigurationisbetterthanthemultipleSRPsconfigurationoramulti-bladeSRPone.

  • 标签: 平流层飞艇 反向旋转 螺旋桨 风洞试验 空气动力学性能 SRP
  • 简介:Thereexistsauniversalphenomenathatsodiumionsareleakedfromthestrongbasicanionexdchangerinoperation,whichhasbeenpuzzlingtheresearchersworkinginthefieldofwatertreatmentforyears.Itiswellknownthattheleakageofsodiumionswillseriouslyaffectthepruityofeffluent.Onthebasisoflotsoflaboratoryandindustrialexperiments,themechanismofthesodiumionsleakedfromananionexchangerhasbeenpreliminarilymadeoutandsomenewchemicalreactionequationsaswellassomeimprovingmeasureshavebeenputforwardinthisarticle.

  • 标签: 钠离子 反应机理 强碱 阴离子交换剂
  • 简介:Testingequalityofcovariancematrixhaslongbeenaninterestingissueinstatisticsinference,Toovercomethesparsenessofdatapointsinhigh-dimensionalspaceanddealwiththegeneralcases,theauthorsuggestsseveralprojectionpursuittypestatistics.Someresultsonthelimitingdistidbutionsofthestatisticsareobtained.Somepropertiesofbootstrapapproximationareinvestigated.Furthermore,forcomputationalreasonsanapproximationforthestatisticsbasedonnumber-theoreticroethodisapplied.Severalsimulationexperimentsareperformed.

  • 标签: 协方差矩阵 投影追踪法 自助法 平衡测试
  • 简介:小粒的材料在工业并且在自然是无所不在的。为小紧张,有弹性塑料、发育不全的组成的关系广泛地在设计实践被使用,但是他们不是内在的物理的重要思考。在解释材料的物理的一个统一热力学框架下面,小粒的稳固的水动力学(GSH)是向描述小粒的材料,不是仅仅像固体,而且像液体的行为的延期。在这份报纸,GSH的基础简短被对待然后简化了在triaxial压缩分析quasistatic变丑。计算压力紧张关系和容量的紧张与试验性的结果相比。在GSH的主要参数的影响,特别他们的生气联合影响,被分析,他们的物理意思进一步被澄清。在参数被校准以后,处于典型压力状态的计算压力价值被发现在22%测试价值以内。同时,精力驱散在triaxial压缩期间被分析。上述结果支持并且部分确定GSH。

  • 标签: 颗粒状物料 流体动力学 三轴压缩 固体状 试验参数 塑性本构关系
  • 简介:DisclosedisamethodofpreparinghypophosphorousacidcomprisingcontactinganinsolubleanodewithanaqueoussolutionofhypophosphiteanionsandapplyingadirectcurrentthroughtheinsolubleanodetoacathodeinelectricalcontactwiththeequeoussolutiontogenerateH^+ionsintheaqueoussolutiontherebyformingahypophosphorousacidsolution.Theprocessissimple,lowcostandhighefficient,whichcanbetiedintoanexistingprocessforproducingsodiumhypophosphitewhereintheproductofsodiumhypophosphiteprocessisusedasastartingmaterialinthehypop[hosphorousacidprocess.

  • 标签: 二次膦酸 电渗析 生产