简介:改进a-tricalcium磷酸盐(伪-TCP)的成骨能力骨头水泥,新奇BMP/伪-TCP合成骨头水泥被准备。由测量设定的时间和压缩力量,骨头水泥的水和特征被评估。包括组织学的观察,X光线照相术的调查以及数字图象分析的动物实验在BMP,a-TCP骨头水泥和BMP/之中揭示成骨能力的差别伪-TCP合成骨头水泥。结果证明伪-TCP骨头水泥拥有优秀水和和背景性质以及高机械的性质。比较实验证明BMP/伪-TCP合成骨头水泥有一个更强壮的成骨能力。implant地点的粗野观察不展出任何发炎或坏死。组织学的分析表明材料与主人骨头,和新骨头形成有好osteointegration在材料以内被检测,它正在降级。强壮的成骨能力合成由于不仅优秀osteoconductive潜力而且活跃BMP释放和材料降级贡献的osteoinductive潜力。大颅骨缺点能由充满BMP/伪-TCP合成骨头水泥是愈合得好的。这新奇材料证明自己是一可吸收并且有一个成骨能力的bioactive骨头水泥。关键词伪-tricalcium磷酸盐(伪-TCP)-骨头形态基因的蛋白质(BMP)-骨头水泥-成骨-osteoinductivity-骨头织物工程为中国(2002123)的教育部的突出的年轻教师由863高技术研究和中国(2002AA326080)和资金的发展节目资助了
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简介:Layeredcathodematerialsofhigh-temperaturelithiumbatteries,LiNi1/3Mn1/3Co1/3O2aresynthesizedbyasol-gelmethodwithvariationinfinalsinteringtemperatureforboreholeapplications.Thestructure,morphologyandhigh-temperaturedischargeperformanceoftheseresultingproductsareinvestigatedbyX-RayDiffraction(XRD),scanningelectronmicroscopy(SEM),laserparticlesizeanalysis,galvanostaticandpulsedischarge.Theresultsofstructuralanalysisindicatethatthesamplesinteredat800℃hasthecharacteristicsofgoodcrystallinity,narrowsizedistributionandlargespecificsurfaceareaatthesametime.Thedischargeexperimentsalsoindicatethatthissamplehasthebestelectrochemicalproperties,withthemaximumdischargecapacitiesof314.57and434.14mAh·g-1at200and300℃respectivelyandtheminimumcellinternalresistancesatbothtemperatures.
简介:Anovelfluorescentprobe9-(4-(1,2-diamine)benzene-N1-phenyl)acridine(DABPA)wassynthesizedforthedetectionofnitricoxide(NO)andcharacterizedbyIR,1H-NMRandEI-MSspectroscopy.Basedonaphotoelectrontransfermechanism,thefluorescenceintensitiesofDABPAwereinvestigatedwiththedifferentconcentrationsofNO.Undertheoptimalexperimentalconditions,thefluorescenceintensityofDABPAhadagoodlinearrelationship(R2=0.9977)withNOconcentrationintherangefrom1×10-7to1.5×10-6mol/Lwithadetectionlimitof1×10-8mol/L.ThecytotoxicityinducedbyDABPAwasevaluatedbytheMTT(3-(4,5-dimethylthiazol-2-yl)-2,5diphenyltetrazoliumbromide)assayforbiologicalapplication.Furthermore,theprobeDABPAhadalsobeensuccessfullyappliedtoreal-timeimageNOproducedinPC12cellsinthepresenceofL-arginine.
简介:One-dimensional(1D)nanomaterialsandnanostructureshavereceivedmuchattentionduetotheirpotentialinterestforunderstandingfundamentalphysicalconceptsandforapplicationsinconstructingnanoscaleelectricandoptoelectronicdevices.Zincsulfide(ZnS)isanimportantsemiconductorcompoundofII-VIgroup,andthesynthesisof1DZnSnanomaterialsandnanostructureshasbeenofgrowinginterestowingtotheirpromisingapplicationinnanoscaleoptoelectronicdevices.Thispaperreviewstherecentprogresson1DZnSnanomaterialsandnanostructures,includingnanowires,nanowirearrays,nanorods,nanobeltsornanoribbons,nanocables,andhierarchicalnanostructuresetc.Thisarticlebeginswithasurveyofvariousmethodsthathavebeendevelopedforgenerating1Dnanomaterialsandnanostructures,andthenmainlyfocusesonstructures,synthesis,characterization,formationmechanismsandopticalpropertytuning,andluminescencemechanismsof1DZnSnanomaterialsandnanostructures.Finally,thisreviewconcludeswithpersonalviewstowardsfutureresearchon1DZnSnanomaterialsandnanostructures.
简介:ThetransportpropertiesintheLa2/3(Ca1-xSrx)1/3MnO3(x=0,1/3,2/3)filmspreparedusingtheRFmagnetronsputteringmethodwereinvestigated.TheeffectoftheCa,Srdouble-dopingattheApositionintheLa2/3A1/3MnO3onthestructureofthetargetsandtransportofthefilmshasbeenstudied.Withtheincreaseofx,thestructuresofthetargetstransformfromtherhombohedralphasetothecubicphase;themetal-insulatorphasetransitiontemperature(Tp)ofthefilmsincreases;andthecorrespondingpeakresistivitydecreases.Allthephenomenacanbequalitativelyexplainedbythelatticeeffect.
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简介:Theeffectsoflanthanum-praseodymium-ceriummischmetal(LPC)onthemicrostructureandmechanicalpropertiesofMg-Alalloywereinvestigated.WiththeadditionofLPC,anadditionalrod-likeAl11La3phasewasdepositedinthealloy.LPCgreatlyimprovesthetensilestrengthofcastMg-Alalloysbutnegativelyaffectstheelongationofcastalloysabove473K.Castalloysarestrengthenedbybothprecipitationstrengtheninganddispersionstrengtheningatambienttemperature.Whenthetemperatureexceeds473K,onlythedispersionoperatesasastrengtheningmechanism.
简介:从同样渗出的镁合金Mg-3%Al-1%Zn(AZ31)营舍准备的样品在低周期的疲劳测试被利用以便调查频率依赖者疲劳生活。充分颠倒的控制紧张的紧张压缩疲劳测试在空中在1Hz和10Hz的频率被执行。微观结构被光显微镜学(OM)和扫描电子显微镜学(SEM)检验。当紧张振幅比0.2%低时,疲劳生活与装载频率展出了积极关联,并且twinning的活动在10Hz被增加。当紧张振幅比0.2%高时,重要twinning在生活被发现独立于频率的这二频率,和疲劳被观察。为这频率相关的疲劳一生的可能的原因可能由于在装载频率和紧张振幅之上的twinning的依赖。