简介：Excessmolarvolume(VE)dataonbinaryliquidmixturesofmethylheptenone(MHO)withmethanol,ethanol,n-propanolorn-butanolhavebeendeterminedfromthedensitymeasurementsat298.15Kandatmosphericpressure.ThevaluesofVEinallthesystemsovertheentirecompositionrangearequantifiedbytheRedlich-Kisterequation.TheeffectsofthechainlengthofalkanolsonVEarediscussed.

简介：IntroductionFritillariahupehensisHsiaoetK.C.HsiaisaliliaceousplantgrowinginthesouthwestdistrictofHubeiProvince,China.ItsbulbshavebeenrecordedinthePharmacopoeiaofthePeople′sRepublicofChinaasoneoftheprincipaltraditionalChineseherbsnamed"Hubeibeimu"[1].

简介：与他们的各自的nucleosides，thymidine和cytidine一起的二嘧啶底胸腺嘧啶和cytosine的密度，超声的速度和粘性的试验性的决心面对三盐的不同集中在水的脲答案被执行了，viz。NaCl，KCl和CaCl2。试验性的数据被用于各种各样的热力学的参数的计算，viz。明显的臼齿的体积，明显的臼齿的压缩的可能性，系数A和Jones施舍方程的B，内部压力，声学的阻抗，等等。在调查下面的答案的结构的研究被紫外光谱学也执行了，并且被尝试了协作紫外光谱学的调查结果，结果热力学地获得了。

简介：N酰--hydroxy-4-phenyl-oxazolidinethiones能被处理很快在高收益变换成他们的乙醇thiol酉旨与在0è的EtSH

简介：Thenovelcomplex[K(18-C-6)]2[Cd(mnt)2][18-C-6-18-crown-6,nmt=1,2-dicyanoethene-1,2-dithiolate,C2S2-(CN)2^2-]wassynthesizedandcharacterizedbyelementalanalysis,IRspectrumandX-raydiffractionanalysis.Thecomplexdisplaystwo-dimensionalnetworkstructureof[K(18-C-6)]complexsegmentsand[Cd(nmt)2]complexsegmentbridgedbyS-K-S,S-K-NandN-K-Ninteractionsbetweenadjacent[K(18-C-6)]and[Cd(mnt)2]units.

简介：ThecomplexK3H4GeW9V3O40·8H2OcrystallizedinamonocliiniesystemwithspacegroupP2,Mr=2784.67,a=11.099（3）,b=16.452（4）,c=13.534（4）,β=108.14°,Z=2,V=2348.493,F（000）:2456,μ=239.7cm-1,De=3.932g/cm3.ThefinalR=0.083for4528non-zeroreflexions.ThestructureofanionsGeW9V3O40andGeW9O34belongstoA--type.

简介：合成了通式为K10H5[Ln(PMo7W2VO39)2].nH2O(Ln-La^3+,Ce^3+,Pr^3+,Nd^3+,Sm^3+,Eu^3+,Gd^3+,Dy^3+,Yb^3)的9种五元新型杂多配合物，并用元素化学分析，TG，ICP，IR，UV，31^1P,51V-NMR,ESR,XPS,XRD进行了表征，结果表明新配合物仍保持Keggin结构，稀土元素处于配合物的内界。借助TG－DTA，不同温度下的IR，XRD的水溶性实验考察了新配合物的热解性质，得出了热稳定的温度范围为400℃-500℃，为催化研究提供了依据。

简介：Wehavesuccessfullydemonstratedthathighqualityandhighdielectricconstantlayerscanbefabricatedbylowtemperaturephoto-inducedor-assistedprocessing.Ta2O5andZrO2havebeendepositedatt＜400℃bymeansofaUVphoto-CVDtechniqueandHfO2byphoto-assistedsol-gelprocessingwiththeaidofexcimerlamps.TheUVannealingofas-grownlayerswasfoundtosignificantlyimprovetheirelectricalproperties.Lowleakagecurrentdensitiesontheorderof10-8A/cm2at1MV/cmfordepositedultrathinTa2O5filmsandca.10-6A/cm2forthephoto-CVDZrO2layersandphoto-irradiatedsol-gelHfO2layershavebeenreadilyachieved.TheimprovementintheleakagepropertiesoftheselayersisattributedtotheUV-generatedactiveoxygenspeciesO(1D)whichstronglyoxidizeanysuboxidestoformmorestoichiometricoxidesonremovingcertaindefects,oxygenvacanciesandimpuritiespresentintheas-preparedlayers.Thephoto-CVDTa2O5filmsdepositedacross10.16-cmSiwafersexhibitahighthicknessuniformitywithavariationoflessthan±2.0%beingobtainedforultrathinca.10nmthickfilms.Thelamptechnologycaninprinciplebeextendedtolargerareawafers,providingapromisinglowtemperatureroutetothefabricationofarangeofhighqualitythinfilmsforfutureULSItechnology.

简介：利用直接法合成未见文献报道的K8[ZnMg（H2O）W11O39]·15H2O，通过ICP，IR和XRD等方法对其结构进行表征，结果表明所合成的配合物具有Keggin结构．采用化学热扩渗法对合成配合物进行稀土扩渗实验，经XPS测试表明，有微量的钆渗进配合物的体相，并与组成元素存在键合作用，导电性测试结果表明，扩渗后试样的导电率提高10^5倍，是一种优良的固体电解质，有望成为具有实用价值的功能材料．

简介：提出了一种求解离子晶体等价格点的单粒子离子Dirac方程方法，确定离子晶体的点电荷电量。利用阴阳离子上分配的价电子数之比，给出了计算离子晶体化学键性质的关单式计算了MX（M=Li、Na、K、Rb、X=F、Cl、Br、I）系列晶体点电产电量值和化学键性质，得到了比较好的结果

简介：Yb3+complexeswithtwonitrilotriaceticacidmoleculeswerepreparedandtheircompositionsweredeterminedasK3[Yb(nta)2(H2O)]*5H2OandNa3[Yb(nta)2]*6H2Obyelementalanalyses.Theirstructureswerecharacterizedbysingle-crystalX-raydiffractionanalyses.IncomplexK3[Yb(nta)2(H2O)]*5H2O,theYbN2O7partformsanine-coordinatemonocappedsquareantiprismaticstructure.IncomplexNa3[Yb(nta)2]*6H2O,theYbN2O6partformsaneight-coordinatesquareantiprismaticstructure.Itcanbeseenthattheoutercations(K+andNa+)greatlyaffectthecoordinationnumberandcoordinatestructurefromtheseresults.