简介：AcompletemodelofMetal-Semiconductor-MetalPhotodetector(MSM-PD)ispresented.Itcanbeusedinanycircuitsimulators.SimulatedDCcharacteristicsforaGaAsMSM-PDareingoodagreementwithreportedresults.

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简介：在自然，微生物涉及岩石捱过，在从矿物质的金属的动员，并且在金属降水和免职。这些微生物原则和过程能被改编对待微粒固体浪费。特别从金属珍视获得的稳固的矿物质(沥滤的称为的简历)的金属的微生物增溶是在采矿工业的一种著名技术。我们这里集中于非采矿矿物质浪费为包含金属的稳固的浪费的处理表明基于采矿的技术的适用性。从微粒苍蝇灰的在案例研究介绍的、微生物引起的金属动员(从市政的稳固的浪费焚化发源)而铅，铬，和镍被2，11和32%分别地动员，由Acidithiobacilli导致了>80%的镉，铜，和锌动员。另外，形成HCN细菌的潜力(Chromobacteriumviolaceum，Pseudomonasfluorescens)当面对稳固的材料成长时，被调查动员金属(例如，包含铜的矿石，电子碎片，花的汽车催化变换器)。C。violaceum从有细密纹理的镍粉末作为tetracyanonickelate动员镍被发现有能力。黄金是微生物引起地是的solubilized从电子废物的dicyanoaurate。另外，氰化物建筑群铜在切碎的打印电路板碎片的生物处理期间被检测。水溶性的铜和铂氰化物也在花的汽车的处理期间被检测催化变换器。

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简介：ＩｍｐｏｒｔａｎｃｅｏｆＭｅｔａｌ－ＯｘｉｄｅＳｕｐｐｏｒｔＷｅｔｔｉｎｇａｎｄｉｎｔｅｒａｃｔｉｏｎｓｏｎＵｎｄｅｒｓｔａｎｄｉｎｇｏｆＰｈｙｓｉｃａｌａｎｄＣｈｅｍｉｃａｌＢｅｈａｖｉｏｕｒｓｏｆＳｕｐｐｏｒｔｅｄＭｅｔａｌＣａｔａｌｙｓｔｓＬｉ...

简介：Thecarbynecompound[Br（CO）2（Py）2Mo（≡CC6H5）]（Py=pyridine）（1a）reactswithCo2（CO）8,Fe2（CO）9andMn2（CO）10togivetetrahedraltri-metalclustercompoundsCo2Mo（μ3-CC6H5）Br（CO）8（Py）2（2）,Fe2Mo（μ3-CC6H5）Br（CO）9（Py）2（3）andMn2Mo（μ3-CC6H5）Br（CO）10（Py）2（4）respectively.Tri-metalclustercompoundCo2Mo（μ3-CC6H5）Br（CO）8-（bipy）（bipy=α,α’dipyridyl）（5）ispreparedinasimilarreactionsequencefrom[Br（CO）2（bipy）Mo（≡CC6H5）]（1b）andCo2（CO）8.IR,1Hand13CNMRspectraldataofthesecompoundsarereportedanddiscussed.Thecrystalstructureofcompound（5）hasbeendeterminedbyX-raydiffraction.

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简介：Meltsofleadbismuthgallatecompositionsarehighlycorrosiveandattackoncruciblesofdifferentmaterials.Inthepresentstudy,corrosionbyabaseglass(50PbO-30Bi2O3-20Ga2O3inmolefraction)meltedusingdifferentcruciblesandtheeffectonUV-VISandIRedgeswerestudied.Bymeltingthebaseglassinplatinum/2%rhodium,goldzirconiaandaluminacruciblesshowedlesseffectontheIRedgeandthereforeshiftedtheinfrarededgetolongerwavelength,whereassilicacruciblecontaminatedtheglass,causingaseveredeteriorationintheinfraredandhenceshiftedinfrarededgetomuchshorterwavelength.IntheUV-VISregion,baseglassmeltedinplatinum/2%rhodiumcrucibleshiftedtheedgetothelongestwavelengthwhereassilicacrucibleshiftedtheedgetoshorterwavelength.Thecontaminantsfromgold,zirconiaandaluminacruciblescausedtheUV-VISedgeofthebaseglasstoliebetweenthetwoextremesofPt/2%RhandSiO2crucibles.Theglassesmeltedinabovementionedcrucibleswerealsocharacterizedwithinductivelycoupledplasmaspectroscopy(ICP)analysistomeasurethelevelofcontaminationfromthecrucibles.Dependinguponcrucibleused,thecolorsofglassesobtainedrangedfromredtoyellow.

简介：Thepaperdescribestherecentdevelopingsituationandthelatestresearchachievementsofrefractoryforhotmetalpretreatment.Therelationshipamongdesiliconization,dephosphorizationanddesulphurizationtechniquesandthemaincorrosionreactionsbyvarioustreatingagentsisanalyzed.Someimprovingmeasuresforseveralproblemsinpracticeareputforwardwhileweanticipatethefuturedevelopingdirectionofrefractoryforhotmetalpretreatment.

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简介：DescribedinthispaperarethecharacteristicsoftetradeffectsofREEinrare-metalgranites.Basedontheanalyticaldataandexperimentalgeochemicaldataavailable,itispointedoutthatthetetradeffectsofREEinthegranitesareproducedinthemetal-fluidsystem.Intensefractionalcrystallizationofgraniticmelt(containingREEaccessaryminerals)anditsinteractionwithvolatile-rich(F,Cl)fluidarethemajorfactorsleadingtothetetradeffectsofREE.Fromthis,thispaperpresentsacompositegeneticmodelforhigh-degreefractionalcrystallization-volatile-richfluidmetasomatismofrare-metalgranites.Withthemodel,quantitativecalculationshavebeenmade.Meanwhile,itispointedoutthatthetetradeffectsofREEcanbeusedasanimportantindicatortodistinguishmineralizedgranitesfrombarrenones.

简介：SpectroscopicmethodsareusedtoinvestigatecoordinationstructureofN-picolylpolyurethanetransitionmetalcomplexes(PUPYM,M=Co^2+andNi^2+).Geometricalarrangementofligandsinfirst-shellcoordinationsphereofmetalionsispostulatedtobetetrahedralCoL2Cl2andoctahedralNiL2-Cl2Z2.whereListhepicolylgroupandZisahydrate.FromextendedX-rayabsorptionfinestructure(EXAFS)analysis,bondlengthsformetal-chlorineandmetal-ligandofPUPYMaresimilartothoseofsmallmolecularweighttransitionmetalcomplexes.Atwo-phasemodelofPUPYMwhichbestdescribestheexperimentaldataofDMTAandSAXS.isproposed.Onemicrophaseistheharddomainofselfsegregatedhaedsegmentsbroughtaboutbymetal-ligandinteraction.andtheotherphaseisthematrixofsoftsegments.Transitionmetalion-ligandmoietiesandtheirinteractionsdominatethemacroscopicthermalbehaviorofPUPYM.Theligandfieldstabilizationenergydifference(ΔLFSE)betweenmteald-electronsincomplexeswithtwopicolylligandsinthecoordinationsphereofmetalionsandcomplexesmaintainingonepicolylligandascoordinationpendentgroupiscalculatedonthebasisofobservedcoordinationstructure,anditrepresentstheenergysuppliedtosplitcoordinationcross-links.ΔLFSEofpolyurethanenickel(II)complexislargerthanthatofthecobalt(II)complex,Sincethemobilityofhardsegmentsisininverseproportiontothestrengthofcoordinationcross-links.ahigherα-transitiontemperatureofPUPYNi^2+withrespecttoPUPYCo^2+isfoundasexpected.

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简介：Interactionsofpolyvinylpyrrolidone(PVP)withmetalchlorides(MgCl2,CaCl2,KC1andBaC12)havebeeninvestigatedbyviscometricandspectrophotometrictechniquesinaqueoussolutions.Intrinsicviscosity[η]of(PVP)hasshownadiscontinuitywithvaryingconcentrationofmetalchlorides.ThedecreasingorderofeffectivenessofcationisK1+＞Ca2+＞Mg2+＞Ba2+forpoly(vinylpyrrolidone)solution.ChangesintheabsorptionspectraofthecosoluteswereobservedinthepresenceofPVPinthelowerlimitoftheUV-visibleregioni.e.200-210nm.ThesechangeswereattributedtointeractionofPVPmoleculeswiththecosolutemolecules.Astheconcentrationofthecosoluteincreased,aredshiftinthepeakswasobserved,indicatinganincreaseininteractionbetweenPVPandcosolutes.

简介：Cu,Zn,PbandHgrunofffroyellowlimestonesoilandpurplesoilsandthereltaionshipsbetewwnthemobilityoftheheavymetalsandthesoilcharactheristicswerestudiedinlaboratoryusingarainfallsimulator.TheresultsshowedthattheconcentrationsofsolubleZninsurfacerunoffweresignifcantlynegaivelycorrelatedwiththecontentsof<0.002mmparticlesndCECofthesoils,indicatingthatZnwasmostlyadsorbedbyclaysinthesoils.THecontentsofCuandHginsurfacerunoffwerepositivelyrelatedtotheircontentsinthesoils.TheamountsofCu,Zn,Pb,andHgRemovedbysurfacerunoffwereinfluencedbytheamountsofsoilandwaterlossesandtheircontentsinthesoilsandwerecloselyrelatedtothecontentsofsoilparticles1-0.02mminsize.

简介：Infusionreactordesign,firstwallisonekindofplasma-facingcomponents(PFCs),whichwillbeirradiatedbyhighenergyneutronsandotherparticle,aswellasworkunderhighplasmaheatflux.Theyshouldbeconsideredcarefully.Manyexperimentsand

简介：TheinteractionsbetweenmetalionssuchasZn2+,Pb2+,Mn2+,Hg2+,Cd2+,Ni2+andchitosanhavebeeninvestigatedusingthemodelclustermodelmethodanddensityfunctionalmethod.FulloptimizationandfrequencyanalysisofallclustermodelshavebeenperformedemployingB3LYPhybridmethodat3-21Gbasissetlevelexceptmetalionswhichwereinvokedtouseeffectivecorepotential(ECP)method.Theenergychanges,andthemainstructuralparametershavebeenobtainedduringthetheoreticalstudyoftheadsorptionofmetalionsonthechitosan.Thecalculationsshowedthatthecoordinationmodesofmetalionswithchitosanmodelsweredifferent,thegeometriesofMn2+,Zn2+,Cd2+,Hg2+,Pb2+ionscoordinatedwithtwonitrogenatomsandtwooxygenatomsweredistortedtetrahedral,whilethesquareplanarstructureofNi2+coordinatedtwonitrogenatomsandtwooxygenatomswasobserved.Theheatofreactionbetweensixmetalionsandchitosanmodelsshowedtheorder:Mn2+＞Ni2+＞Zn2+＞Pb2+＞Hg2+＞Cd2+,thissuggestedthatthecoordinationstrengthofMn2+＞Ni2+＞Zn2+＞Pb2+＞Hg2+＞Cd2+.

简介：TheroleplayedbythefunctionalgroupsofLaminariajaponicatreatedbymethanolandformaldehydeinbiosorptionoftheheavymetalswasinvestigated.Infraredspectroscopyanalysisandbiosorptionexperimentsshowthatbothcarboxylandaminogroupsjoininthesorption;chemicaltreatmentdecreasedthebiosorptionefficiencyoftheheavymetals.

简介：TheeffectsofcombinedheavymetalpollutionofredsoilonthegrowthofwetlandriceandthetransferofPb,Cd,CuandZnfromsoilintoplantsweresudiedbygreenhousepotexperiment,Theresultsshowedthattheplantyieldsweremarkedlyaffectedbyheavymetals,withtheexceptionofPb,insoilsundertheexperimentalconditions,withouttakingintoconsiderationalltheinteractionsamongtheelements.Theconcentrationsoftheelemetsinplantsweremainlyaffectedbythespecificelementaddedtothesoil.Theeffectofinteractionsamongtheheavymetalswasverysignificanteitheronplantyieldsorontheconcentrationoftheelementsinplants.Theriskassessmentofacombinedpollutionbyheavymetalsinthesoilisdiscussedpreliminarilyintermsoftherelativepollutionequivalent.

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