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1.
Anumberoflanthanideternarycomplexescon tainingheterocyclicamineshavebeenreportedsince1960 [1] .Inrecentyearsmuchattentionhasbeenpaidtoquaternarycomplexesoflanthanidesbecauseofin terestingstructure ,coordinationmode ,competitionre actionandproperty[2~ 9] .ESRcane… 相似文献
2.
Inrecentyears,Heetal.[1]andInoueetal.[2]discoveredagroupofamorphousalloyswithaluminumcontentcloseto90%(atomfraction),whichpossessexcellentspecificstrengthinAlTMRE(TM=transitionmetal)systems.Theyhaveupto500~1100MPainstrengthandgoodductility.However,theoriginofAlbas… 相似文献
3.
Effect of Cerium on Activity of α-Amylase from Porcine Pancreas 总被引:1,自引:0,他引:1
Rareearthscanaffectchloroplastultra structure[1~ 3 ] andenzymeactivity[4~ 7] ,bywhichoflowconcentration ,biologicalfunc tionsareaccelerated ,butrestrainedathighconcentration .α Amylase ,whichbinds 4or 5calciumionsinformofdipolymer[7] ,playsanimportantroleinthecourseo… 相似文献
4.
Recently ,manymaterialresearchershavecometorealizethattheelectroniccharacterhasadecisionalroleonmaterialpropertiesandmicrostructure[1~ 3] .Theseworksrevealanewmechanismtomaterialbehaviorandanewun derstandingelectrontheoryofalloy .Addition aly,theeffectofane… 相似文献
5.
Aluminumnitride (AlN) ,duetogoodphysicalandmechanicalproperties ,issuitableformultilayerlayoutandisconsideredasapromisingmaterialforsubstrate ,electronicpackingandlarge scaleintegratedcircuit[1~ 4] .Inaddition ,itiswidelyusedintheoptoelec tronicfield ,suchasMOD… 相似文献
6.
Perovskite typeoxides (generalformulaABO3 )havebeenattractingmuchattentionformorethantwodecadesduetotheirpotentialcommercialapplicationsascatalystsforvariousreactions :oxidationofCO[1~ 3 ] andlighthy drocarbons[4~ 7] ,combustionofnaturalgasorCH4 [8~ 1 1 ] (tocontrolN… 相似文献
7.
Nickel metalhydride (Ni MH )batteryhasbeenusedinmobileelectricfacilitiessinceitscommercialization .RecentlyNi MHbatteryhasalsobeendevelopedandusedintheareaofelectricvehicles[1~ 3 ] .AlargeamountofvaluablerawmaterialsareneededinmakingNi MHbatteries .Providedtha… 相似文献
8.
Adsorption of Er( Ⅲ ) and Its Mechanism on Diglycolamidic Acid Resin 总被引:15,自引:0,他引:15
Thesynthesischaracterizationandadsorp tionpropertyofpolymericmaterialshavebeenpublishedinrecentyears[1~ 9] .DiglycolamidicacidresinDAARisanovelpolymericmaterialwhichcontainsafunctionalgroup [-N(CH2 COOH ) 2 ].Itpossessesnotonlyprotonthatcanexchangewithcation ,b… 相似文献
9.
Theanticoagulationfactor (ACF)fromthevenomofAgkistrodonacutusinSouthernAnhui,China ,possessesmarkedanticoagulantactivity[1] .The1H 1 DNMRand1H 2 Dshift edcorrelated (COSY 90 )spectraofACFhavebeendetermined ,andtheαHandβHoftheAlasidechaininACFhavebeenassigned[2 ] .Th… 相似文献
10.
since 1 960s ,theresearchoftheZieglercatalystapplyingtothepolymerizationofacry latehasbeenincreasing[1~ 3] ,forexamplethepolymerizationofacrylatewithzirconiumorrareearthcatalystshasbeenpublished[4~ 6 ] .However ,thepolymerizationmechanismoftheacrylatewiththetrans… 相似文献
11.
Anelectrorheologicalfluidisasuspensionofpolarizablesolidparticlesdispersedinanon conductingliquid ,exhibitingdrasticandreversiblechangeinrheologicalpropertieswhenanexternalelectricfieldisapplied[1] viaorderingofthemicrostructureintoparticulatecolumns.Thi… 相似文献
12.
Vanadiumoxidehasbeenwidelystudiedintherecentyearsbecauseofitsimportanceinmanyareasofchemistry .Intheareaofcataly sis ,vanadiumoxidehasbeenusedasacata lystforselectiveoxidation ,oxidativedehydro genation ,andammoxidationreaction[1~ 4] .Intheoxidationreactionon… 相似文献
13.
Recently ,therehasbeenconsiderablein terestinlanthanidehexacyanoferratesandtheanalogouscobaltaswellaschromiumcomplex esbecauseoftheirpotentialascatalytic ,semi conductive ,andmagneticmaterials[1~ 9] .And ,someofthesecyanidesaresemiperme ablemembraneswhicharev… 相似文献
14.
Aswellknown ,theadditionofcarboncanpre ventthephosphorus inducedintergranularfailureiniron .ButitistheresultofusingAES (Augerelec tronspectroscopy)analysisinfracturedsurfaceanal ysis .ErhartHetal[1] ,inordertoexplainthemech anismofcarbonsuppressingtheintergra… 相似文献
15.
Preparation,Photo and Electroluminescence Properties of Novel Rare Earth Aromatic Carboxylates 总被引:5,自引:0,他引:5
SinceKidoetal.havefirstreportedonorganicelectroluminescence (EL)usingrareearth (RE)complexastheemittinglayer[1] ,muchworkhasbeenfocusedonthisfieldduetoitshighcolorpurity[2~ 4] .However,thekeyproblemwithrareearthβ diketonecomplexesistheirpoorthermalstabilityand… 相似文献
16.
Therearealotsofreportsaboutthepoly merizationofacrylonitrile (AN) [1~ 3] .Intheradicalpolymerization ,usuallyitisinitiatedbybenzoperoxide ,K2 S2 O4 Na2 S2 O3,Fe2 + H2 O2 andsomeorganiccompounds .There portsonorganolanthanidesassingle componentcatalystswasrarelyinlitera… 相似文献
17.
Thechemicalheatingasakindofheatingmethodforladlerefiningispaidmoreandmoreat tention ,suchasinRH KTB ,CAS OB ( PI) ,RH OB[1- 4] etc .Amongthem ,theCAS OBprocessde velopedrapidlyduetoitsabilityofrapidlyraisingtemperatureandaccuratelyadjustingsteelcomposi tion .Butthe… 相似文献
18.
Synthesis, Characterization and Fluorescence of Phenylcarboxymethyl Sulfoxide Complexes with Lanthanide Nitrates 总被引:4,自引:0,他引:4
Rareearthcomplexeswithsulfoxideandaromaticcarboxylacidhavebeenwidelystud ied[1~ 3 ] .Itisprovedthattheybothhavebet terfluorescencecharacter .Howeverthearo maticcarboxylofrareearthcomplexeshaveveryhighfluorescenceemissionintensityandstability ,butsolubilityi… 相似文献
19.
Modification Effects of Lanthanum-Rich Mischmetal on A357 Alloy 总被引:1,自引:0,他引:1
astAl Si Mgalloysarewidelyusedinaeronautical spaceindustryandautomobilein dustrybecauseoftheirsuperiorcastingpro cessingcapability ,fatigueandcorrosionresis tance ,moderatespecificstrengthanddesirablecombinationofmechanicalproperties[1] .A35 7alloyinUSAspecif… 相似文献
20.
Asonepracticalapplicationofsurfacemodificationbasedonlasertechnique ,RE laseralloyinghasbeenwidelyinvestigatedandreported[1] .Althoughthetreatmentofsurfacegas phaseREpermeationhasbeenprovedtobeeffectiveonimprovingsurfacehardness ,abrasiveresistanceandcorr… 相似文献