简介：Sodiumparanitrophenolatedihydrate(NPNa·2H2O)isanexcellentsemiorganicnonlinearoptical(NLO)material,crystallizesbothinwaterandmethanolwithhighdegreeoftransparency.Goodopticalqualitysinglecrystalsofdimensionupto18mmx6mmx3mmareobtainedbyisothermalsolventevaporationtechnique.Thesolubilityofthecrystalindifferentsolventswasmeasuredgravimetrically.ThesinglecrystalsofNPNa·2H2Oshowvariationinphysicalpropertiesandgrowthrateindifferentsolvents.Methanolorethanolsolutionyieldscrystalsofbipyramidalshapewithclearmorphology.However,methanolgrowncrystalisexhibitingimprovedhardnessparametersandpossessesexcellentthermalstabilityascomparedtowatergrowncrystals.TheeffectsofsolventonhardnessparameteralongwiththermalandopticalpropertiesofNPNa·2H2Owasrevealedinthispaper.

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简介：报道了采用温控氢电弧法制备C60及C70。未须纯化，采用透射电镜可直接观察到C60及C70的微观晶体结构。虽然该法产量较低，但为制备C60及C70提供了一种新方法。

简介：这款相机能否像上一代产品C-5060WZ那样广受好评？

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简介：Throughmeasuringthecoefficientoflinearexpansion,thestructureandpropertiesoftheLi2O-Al2O3-SiO2lowexpansionglassceramicscontainingB2O3arestudiedbyJRandXRD.ItisshoutnthattheIRmethodisefficientinthestudyoftheglass-ceramicsstructure.Thereisa"Boronabnormality"inthesystemwhichhasanimportantinfluenceonthepropertiesoftheglass-ceramics.

简介：TheelectronicstructuresofCuS2,CuSe2andCuTe2withpyritestructures,withintheframeworkthedensity-functionaltheoryhavebeeninvestigated.ThecalculatedresultsexplainedtherecentexperimentalresultswhichshowthatthereisnoclearindicationofstrongelectroncorrelationsintheelectronicpropertiesofCupyrites,duetothedominantchalcogenpcharacterratherthandcharacteristicofCuattheFermilevel.

简介：TheantibacterialeffectofcarryingsilverB2O3-SiO2-Na2Oglassmaterialwasstudiedbymeansofantibacterialring,nephelometery,MICvalue,thinfilmattachmentandmicrocalorimetry,respectively.TheexperimentalresultsoffivekindsofantibacterialtestmethodsarealmostidenticalandcanverifythatcarryingsilverB2O3-SiO2-Na2Oglassmaterialexertsanexcellentantibacterialperformance.Antibacterialringandnephelometeryaresimple,quick,buttheprecisionisrestrictive.MICvalue,thinfilmattachmentmethodandmicrocalorimetrycanquantitativelycomparetheantibacterialeffectsoftheantibacterialglassmaterial.Comparedwiththetraditionalmicrobetestmethods,themicrocalorimetrycananalyzetheinhibitingeffectofthecell'sgrowthandmetabolismontheantibacterialglassmaterialbymonitoringthethermaleffectcontinuouslyandautomatically.

简介：索尼爱立信橙色的W800c是同时期最出色的音乐手机之一但单调的机身颜色却将不少消赞者拒之门外，索尼显然也注意到了这一点。因此推出了W800c的后继产品W810c，功能上并没有大的变化，只是颜色改成了黑色。

简介：TiB2ceramicspowderwassynthesizedfromB2O3-TiO2-Mgsystem.TheeffectsofTiB2additionasdiluentonthecombustionsynthesisprocesswereinvestigated.TheresultsofthermodynamiccalculationandexperimentsshowthattheincreaseofTiB2contentrangingfrom0to20wt%canreducetheadiabatictemperatureTadfrom3100Kto2896KandcombustiontemperatureTcfrom2139Kto1621Krespectively.TheparticlesizeandhalfwidthoftheparticledistributionarealsoincreasedwiththeadditionofTiB2increasingfrom0to20wt%.ThecombustionproductisamixtureofTiB2,MgO,andotherintermediatephases.TheleachedproductcontainsmainlyTiB2,TiO2andTiN,anditsoxygencontentis7.77wt%.

简介：很多人可能已经不记得Photoshop出现之前的日子了，那时用胶片拍摄的照片如果有些小毛病，我们也毫无办法。

简介：Defectsofpolymer-derivedSi-C-OfiberswereintensivelystudiedbytheSEMandTEMtechniquesandtheiroriginationswerealsodiscussedonthebasisoffactorsexperiments.Thedefectswerefoundmainlyintheformofstrumaes,pitsandsplitsonsurfacesaswellasmicroflawnetworks,porosityclustersandinclusionsinthebulk.Factorsexperimentsrevealthatanonuniformoraninsufficientcuringwouldresultinlarger-sizedstru-maesorinteriormicroflaws.Gasevolutionratesduetodifferentfiringrateshaveagreatinfluenceontheformationofinternalmicrofiawsorporosityclustersandsomeoxidation-inducedpitsorsplitsmaybeformedonsurfacesbe-causeoratraceofoxygenorwatervaporaccumulatedfromtheflowinginertatmosphereduringpyrolysis.

简介：最初印象歌美M9系列MP3播放器拥有自己的独到之处。这款M9当然也不例外，它拥有全面的功能和流线型外观。不要小看它，也许它将成为一季最浒的潮流“饼干”。

简介：Usingdirectfinitedifferencemethod,anumericalmodelforsimulatingthetemperaturefieldinthechargeduringinductionskullmelting(ISM)hasbeendeveloped.Onthebasisofthemodel,thetemperaturefieldinTi-47Ni-9Nbingothasbeencalculatedundervariousmeltingconditions.Finally,theprocessingparameters(meltingpower,melting-downtimeandthefinalmelttemperature)havebeenoptimized.

简介：Aneffectivedispersion-strengtheningphaseinAl-8Fe-2Mo-2Zr-2Nd-0.7Ti-1.6SialloywasidentifiedtobeanagedprecipitatephasewithpossiblechemicalstoichiometryofAl20（Ti,Mo）2Ndandfcccrystalstructurewithao=1.455nm.ThestructurewasdeterminedtobeFm3mspacegroup.

简介：采用扩展的Huckel方法与格林函数方法，分析了双Au电极作用下C60富勒烯分子的电子结构与电子输运特性。研究结果表明，C60富勒烯分子与Au电极“接触”后，其分子轨道能级发生了较大的变化，HOMO、LUMO间的能隙显著减小；C60与Au电极之间的结合既有共价键的成分，又有离子键的成分；C60富勒烯分子的电压-电导率曲线以及伏安曲线表现出了微妙的量子特性。

简介：Theimplantedionrange,thedepthprofileandthefilmsttuctureoftheimplantedlayerwerestudied;thecarrierconcentrationandthemobilityweremeasured;theconductivitymechanismofthefilmimplantedFeintoAl2O3ceramicwasdiscussed.TheconclusionisthattheimplantedFe2+ionsmoveintoAl2O3latticeandreplaceAl3+toformsubs-titutionimpuritiessothattheionimplantedlat-tice,ascomparedwiththeoriginalone,presentsaneffectivenegativechargewhichformsanegativechargecenter.Avacancyisboundarroundit,andanacceptorisintroducedintheforbiddenband.

简介：与更大的秒顺序非线性发现材料，有GeS_2的各种各样的比率的Ge-P-Schalcogenide眼镜:P_2S_5被melt-准备--熄灭方法。这些眼镜的微观结构和光学性质被XRD描绘，拉曼，Vis-NIR光谱学并且。制造者穗技术。第二泛音代(SHG)在被归功于到热应力坡度，and/或微各向异性的缺点的同样准备的锕系元素硫族元素化合物眼镜里被观察(例如孤独对轨道或原子价选择对)比较喜欢--同样准备的眼镜的取向。

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简介：三新奇Ba_5RNiNb_9O_(30)(R=La，Nd和Sm)陶艺在BaO-R_2O_3-NiO-Nb_2O_5系统被准备并且描绘。所有三混合物areparaelectjicphasesadopting。在房间温度的充满的四角形的钨铜(TB)结构。在1MHz，Ba_5RNiNb_9O_(30)陶艺有高电介质在范围193-245.3，在范围0.0059-0.0087的低绝缘的损失，和在范围的绝缘的常数(tau_e)的温度系数的常数-1140-1310X10~(-6)中心点degC。他们绝缘的常数的温度系数显著地Ba_5RNiNb_9O_(30)与那些相比被减少(R=La，Nd，Sm)陶艺。