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1.
ThebacteriostaticpotencyofceriumhumicacidcomplexwasevaluatedbyexperimentalstudyonitscomplexreactionwithE.coli,Bacilluspyocyaneus,Staphylococcusaureus,Leuconostocandstreptococcusfaecalis,andbycomparisonofitsbacteriostaticeffectswiththatofceriumcitrat… 相似文献
2.
Asoneoftheexternalparameterswhichaffectthematerialproperties ,theeffectofmagneticfieldonatomshasbeenstudiedandappliedinmanyareasandmakesmuchprogressinmanysubjects ,suchassolidphysics ,surfacephysics ,andplasmaphysics .ThematuretechnologyMCZinsemiconductor… 相似文献
3.
Rollerforcoldrollingisakeyforgingpart,whichexperiencescontactstress ,alter natingstressandfrictionalstressduringrolling .Therefore ,higherstrength ,surfacehardness,wearresistanceandenoughtough nessshouldbeconsideredformanufacturingthiscoldroller[1] .Sincethe… 相似文献
4.
Owingtotheexcellentresistancetohightemperaturecorrosion ,aluminizingcoatingshavebeenwidelyusedinvariousindustries ,suchasenergyresources ,transportation ,chemicalprocesses ,aeronauticsandastronau ticsetc .Thetraditionaltechniquestoobtaina luminizingcoatings… 相似文献
5.
Thereactionofmetaldropletwithslagshasshownthatthemigrationabilityofoxygeninslagiscontrolledbyelectrochemicalfactors[1 4 ] (suchaspresenceofelectronicconductor ,electronicconduc tionofslagphase) .Thereactionsatinterfacebe tweenslagandmetalmeltsareveryimporta… 相似文献
6.
Rareearthcomplexisanimportantkindoflumi nescencematerials ,muchattentionhasbeenpaidtotheexcellentluminescencecharacteristicsbasedontheirelectrictransitionbetweenthe 4fenergylevels[1,2 ] .Inrecentyearsmanyrareearthcomplexesthatchelatedwithorganiccompounds ,s… 相似文献
7.
Thedesirableluminescencecharacteris ticsofsomelanthanideionsbasedontheintra f orbitaltransitionshavereceivedmuchatten tion.Rareearthcomplexes,especiallythosecontainingEu3 andTb3 ,oftenexhibitgoodluminescenceowingtothestrongabsorptionoftheorganicligandsand… 相似文献
8.
Itwasthoughtthattherareearthswerenotcarbideformingelementsbasedonthefactthattherareearthsreactoncarboninsteelsimilarlytosilicon ,theelementwhichneverformscarbideandisdifferentfromtheele mentssuchaschromium ,manganeseandtung stenwhichformcarbides .Moreove… 相似文献
9.
Inthetwinrollstripcastingprocess ,themechanicalbehaviorofcastingmaterialcangreatlyinfluencerollingforce,whilerollingforceisrelevanttostripsurfacequali ty .Ifrollingforcesurpassesalimitedvalue ,theheattransferfromstriptocastingrollwillbecomeunevenalongstr… 相似文献
10.
Therearealwayssomegeometricaldiscon tinuities ,suchasfastenerholes ,filletsandgraves ,inpracticalaircraftconstructioncom ponents .Intheviewofmaterialmechanics ,thesegeometricaldiscontinuitiescanbecon sideredasnotches .Stressconcentrationusual lyoccursatnotch… 相似文献
11.
Impact Wear Properties of Metal-Plastic Multilayer Composites Filled with Glass Fiber Treated with Rare Earth Element Surface Modifier 总被引:2,自引:0,他引:2
Metal plasticmultilayercomposites ,whicharecomposedofasteelbacking ,amiddlelay erofsinteredporousbronzeandasurfacelayerconsistingofamixtureofpolytetrafluo roethylene (PTFE)andfillers ,possessmanygoodpropertiesoftheoriginalmetalsandplas tics,suchashighmechan… 相似文献
12.
Thejoiningoftwosolid metalscanbesuccess fullymadebyweldinginsuperplasticstate ,inwhichthemetalsareactivatedwithlowdeformationstress,high plasticdeformabilityetcthatissuper plasticsolid statewelding .Asanewtechnology ,ithasabrightandattractivefuture ,forexam… 相似文献
13.
Lanthanideamidecomplexesareanim portantclassofprecursorsforlanthanidederivatives .Itcanbeeasilytransformedtocor respondinglanthanidecomplexbyreactingwithinvolvingproticreagents[1,2 ] .Thelanthanideamideusedassyntheticprecursorisneutralhomolepticcomplex ,oth… 相似文献
14.
Theaminoacyl tRNAsynthetases (aaRSs)playpivotalrolesinproteinbiosynthesis,whereeachofthe 2 0aaRSsisspecificforoneaminoacidanditscognateisoacceptorsoftRNA .TheinteractionofRE3 withtRNAwasstudiedbythemethodsofnuclearmagneticresonance[1 ,2 ] ,ultraviolet,fluoresce… 相似文献
15.
Preparation of MachinableY—TZP/LaPO4 Composite Ceramics byLiquid Precursor Infiltration 总被引:1,自引:0,他引:1
Ceramicmaterialshavebeenusedasen gineeringmaterialsbecauseoftheirhighstrengthandhighhardness .Thedisadvantageofsuchceramicsisthedifficultyinmachiningaftersintering ,whichleadstohighmachiningcost.Todecreaseit ,variousceramicswithreasonablemachinability ,ca… 相似文献
16.
Asanewclassoffunctionalmaterialswithnanometersize ,graphiteintercalationcom pounds (GIC)consistofalkalimetalsoflowionizationpotentialandsubstancesofhighelectronicaffinity ,suchashalogen ,halide ,inorganicandorganicacidsetc[1] .Inrecentyears ,GICattractmuchatt… 相似文献
17.
Thelanthanidecomplexesoforganiclig andsasfluorescentmaterialshavereceivedex tensiveattention .Theuseoffluorescentorgano lanthanidecomplexesrequirehighfluo rescenceintensityandlowcostcomplexes .Inrecentyears ,thefluorescenceenhancementofTb(Ⅲ )orEu(Ⅲ )complexe… 相似文献
18.
Asonepracticalapplicationofsurfacemodificationbasedonlasertechnique ,RE laseralloyinghasbeenwidelyinvestigatedandreported[1] .Althoughthetreatmentofsurfacegas phaseREpermeationhasbeenprovedtobeeffectiveonimprovingsurfacehardness ,abrasiveresistanceandcorr… 相似文献
19.
Heteropolycompoundisanewcatalystwithmanyfunctionsinchemistryindustry .Itsexcellentcatalyticperformanceisdeterminedbyitscompositionandstructure .Ithassimplecompositionandfixedstructure ,althoughitmayconsistofmanyelements .Itsstructureandpropertycanbechang… 相似文献
20.
Theintermetalliccompoundswithtransitionalbondingfeaturesoftenhaveverycomplexcrystalstructuresanduniquephysicalandchemicalproperties.Owingtotheirpartialdirectionalandpartialsaturationalfeaturesofthebonds,thevalenceruleandtherulesformetalliccompounds… 相似文献