简介:FractionsofplasmaproteinofmaleKunmingmice(bodyweight24.2±0.3g),treatedwithCisplatini.p.injectionindoseof10mg/kg,wereobtainedbyseparationonSephadex-G-50columns,bufferedwithammoniumacetatetopH5.7,TheXSRFexperimentswereperformedattheBEPC(BeijingElectronPositronCollider)synchrotronradiationfacility.Theelements(Pt,S,Ca,Fe,Ni,Cu,Zn,Se,BrandSr)inthefractionoftheplasmaproteins(>22KD)wereassayedusinghighlysensitiveSXRF.TherelativeconcentrationsofelementswerecalculatedbyanormalizationofCOmptonscatteringintensityaround22KeV,afterthenormalizationforcollectingtimeofX-rayspectrumandthecountingoftheionchamber,andsubractingthecontributionofthepolycarbonatefilmusedforsupportingthesamples.ThedeterminationcouldprovethattheelementPtinplasmawasboundwithmacro-molecularprotein.CuandSwerepresentinthefractionoftheproteininmicetreatedwithCisplatinandexhibitedanincrease,therationoftreated/controlwere1.66±0.06and1.78±0.33repectively,whereasZndecreasedtoaratioof0.78±0.09,OurresultsareinagreementwithotherswhichshowedthatCisplatinexposureleadstoamarkedlossofkidneycopper,andamoderateriseindidneyzinc.However,thisworkmainlyfocussedontheimplementationofthisanalyticalprocedure,butnotontheresultsoftheinvestigationsoftheeffectofCisplatinontraceelementsinplasmaprotein.
简介:Copper-dopedZnOnanoparticlesweresynthesizedbythesol-gelmethod.TheX-raydiffraction(XRD)resultshowsthatZn1-xCuxO(x≤0.04)samplesaresinglephasewithZnO-likewurtzitestructure,whilethesecondaryphaseCuisobservedinaZn0.95Cu0.05Osample.MagneticmeasurementsindicatethatZn1-xCuxO(x≤0.04)samplesareferromagneticatroomtemperature.Astronggreenpeak(520nm)wasobservedexceptforUVbandpeakinphotoluminescent(PL)spectrumofZn0.98Cu0.02O.
简介:HighorderBraggscattering(M=2andM=3)operationsofthedistributedfeedbackdyedopedsol-gelsilicalasersareachievedusingthesecondharmonicoutputofaNd:YAGlaserasthepump.Laserlinewidthoflessthan0.06nmandconversionefficiencyof0.7%forM=3and11%forM=2aremeasured.Wavelengthtuningofabout15nmaroundtheemissioncenterhasbeenrealizedbyvaryingtheintersectionangle.
简介:有一致的杆形状的单斜晶的LaPO4nanostructures被一个简单大音阶的第五音胶化方法成功地综合了。过程包含形成同类,透明,metal-citrate-EDTA胶化先锋,由锻烧列在后面支持胶化先锋的热分解产出LaPO4nanoparticles。他们的形态学和结构被XRD,TEM,TG-DSC和HRTEM描绘。结果显示单个单斜晶的阶段LaPO4nanorods乐意地在800点被获得吗?在3h以内。而且,做Eu3+的LaPO4nanocrystals的光致发光(PL)描述被执行。在PL性质上做内容的锻烧温度和Eu3+的效果详细被详细描述。房间温度光致发光(PL)描述表明光亮度以及到5D0-7F2的5D0-7F1的紧张比率高度依赖于锻烧温度,并且Eu0.05La0.95PO4nanophosphor与最强烈的排放显示出相对有希望的PL表演。
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简介:Inthispaper,anovelSPMEmode,PDMS-coatedsolidglassmicrospheres(SGMs),werepreparedbysol-gelmethod.UsinghomemadethermaldesorptionunitcoupledwithCGC-FID,sixPAHsasmodelanalytes,theperformanceofthenewmodewascharacterized.Thenewextractivephaseexhibitedhighthermalstabilityandsatisfactoryextractioncapability.Thedetectionlimitswere0.01-0.045ng/mL,andthelinearitywasfrom0.5ng/mLto96ng/mL.TheR.S.D.sofrepeatabilityforretentiontimeandpeakareawereallwithin0.074%and6.7%,respectively.TherecoveriesofthePAl-Iswere78-127%fromthesamplestakenfromriverwater.
简介:Nanocrystallineoxidedispersionstrengthened(ODS)ferriticsteelpowderswithnominalcompositionofFe-14Cr-3W-0.3Ti-0.4Y2O3aresynthesizedusingsol-gelmethodandhy-drogenreduction.AtlowreductiontemperaturetheimpurityphaseofCrOisdetected.AthigherreductiontemperaturetheimpurityphaseisCr2O3whicheventuallydisappearswithincreasingreductiontime.ApureODSferriticsteelphaseisobtainedafterreducingthesol-gelresultantproductsat1200℃for3h.TheHRTEMandEDSmappingindicatethattheY2O3particleswithasizeofabout15nmarehomogenouslydispersedinthealloymatrix.ThebulkODSferriticsteelsamplespreparedfromsuchpowdersexhibitgoodmechanicalperformancewithanultimatetensilestressof960MPa.
简介:Modifiedsensingmembranesbasedonfluorescencequenchingwerepreparedbythesol-gelmeth-od,usingformamideasthedryingcontrolchemicaladditive,tetraethoxysilaneasthemainmaterial,Ru(phen)3Cl2astheindicator.Themembranewiththeoptimumthicknessof20-50μmisuniformandcrack-free,inwhichtheindicatorhasaverysmallleakingrate.Themembraneisimmersedinwaterfor50h,themembranesensingparameterMdecreasesbylessthan5%.Thefiberopticoxygensensorwiththesensingmembranehasadetectionlimitof5×10-6M(ppm),aresponsetimeoflessthan30s,excellentreproducibilityandstability.
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简介:Threenewcatalystsbasedonthesilicagelsupportedpolyetherionicliquids(ILs),i.e.,[HO-PECH-MIM]Cl-Si,[H2N-PECH-MIM]Cl-Si,and[HOOC-PECH-MIM]Cl-Si,wereprepared,andtheirchemicalstructureswerecharacterizedbyinfrared(IR)spectroscopyandnuclearmagneticresonance(NMR)spectroscopy.Thermogravimetricanalyzer(TG),X-raydiffractometer(XRD)andscanningelectronmicroscope(SEM)wereusedtoevaluatetheirthermalstability,crystallinestructureandapparentmorphology,respectively.SurfaceareasofthepreparedcatalystswerecalculatedbytheBrunauer-Emmett-Teller(BET)method.Thecatalyticreactionforthesynthesisofpropylenecarbonate(PC)usingCO2andpropyleneoxide(PO)inthepresenceofthepreparedcatalystswasstudied.Theinfluencesoftimesofrecyclingandcatalyststructureoncatalyticperformancewerealsoinvestigated.TheexperimentalresultsshowedthatthesilicagelsupportedpolyetherILscatalystssuccessfullypreparedundermildconditioncouldpossesstheadvantagesofhighactivity,excellentthermalstability,goodselectivityandeasyrecycling,whilethephasetransitionoftheliquidpolyetherILscatalystswasalsoachieved.Whenthereactiontemperaturewas90°C,theCO2pressurewas2.0MPaandthedosageofthecatalystwas2.5%,[HOOC-PECH-MIM]Cl-Siwasfoundtohavethebestcatalyticperformanceinthecatalyticprocess,withtheconversionratereaching100%andtheselectivityequatingto98.2%.Theconversionrateandselectivitystillcouldreachmorethan90%evenafterthecatalystwasreusedfor15times.
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简介:ThisPaperreportsenrichmentandsepqrationoftracePd(Ⅱ)withsilicagelbondedby(benzolyazo-arsenazoI)-aminopropyl(BAAI·SG).BAAI·SGisstableinsolutionbetween6mol/LHClandpH9.0.ThemaximumadsorptivecapacitiesofBAAI·SGandSGare52.7,23.5μmol/grespectively.AfterpreconcentrationthroughBAII·SGcolumn,Pd(Ⅱ)ofppblevelinartificialwatersamplescanbemeasuredbyspectrophotometry.
简介:Magneto-opticFaradayrotationeffectandtheamountofbismuthsubstitutedinyttriumirongarnetsinglecrystalfilmspreparedbygel-coatingonmodifiedgadolinium-galliumgarnetsubstratesareinvestigated,wherethegelissynthesizedbyasol-gelreactionofnitratesandethyleneglycol.Thecoatedgelisannealedinairattemperaturesupto660℃for4h,whichisabout300℃lowerthanthatofliquid-phaseepitaxy.ThemaximumamountofBisubstitutionisx=2.7andthecrystallizationtemperatureofgarnetphasedecreaseswiththeincreaseofxdownto520℃forx=2.7.Inthisfilm,ahugeFaradayrotationof-8.1×104(°)/cmatλ=0.633μmisobtained.
简介:Asystematicstudyonthesynthesisandantibacterialactivityofthequaternary"onium"saltsgraftedonaninsoluble"gel-type"stryene-7%divinylbenzenecopolymerbypolymer-analogousreactionsisshowed.Antibacterialactivityofquaternaryammoniumand/orphosphoniumsaltsgraftedonpolymer-supportshasbeenstudiedagainststaphylococcusaureusandEscherichiacoli.Awidevarietyof"onium"saltsboundtomacromolecularsupportswithdifferentquaternarygroupsanddifferentquaternarychainlengthsubstituentswereexamined.Theantibacterialactivityofmixed"onium"saltsincreasesasaconsequenceoftheassociationofammoniumandphosphoniumsaltsgraftedonthesamepolymericsupport.
简介:4-hydroxy-4'-nitroazobenzene(NHA)and4-amino-4'-nitroazobenzene(DO3)werepreparedrespectivelyfromp-nitrophenylamineasaprecursorcompound.Twokindsofdopedorganic/inorganichybridnonlinearoptical(NLO)materialscontainingNHAandDO3weresynthesizedbySol-Gelprocess.ThepreparationandpropertiesoftwoNLOmaterialswerestudiedandcharacterizedbyFTIR,1H-NMR,UV-VIS,SEM,DSCandSHGmeasurements.TheresultsshowthatthemaximumdopingamountsofNHAandDO3intwodopedhybridNLOmaterialsare7.2(wt)%and11.3(wt)%respectively,andthecorrespondingsecond-orderNLOcoefficients(d33values)are2.91×10-8esuand6.14×10-8esu.TwodopedNLOmaterialshaverelativelygoodRTstability,after90daysatRTthed33valuescanmaintainabout85%oftheirinitialvalues,butafter10hat100℃canonlymaintainabout50%oftheirinitialvalues.Inthisreport,thereasonsforhigh-temperatureinstabilityofdopedmaterialswerediscussed,andthepossibleimprovementswerealsosuggested.
简介:narG基因经常为细菌的减少硝酸盐的社区分析被用作一个分子的标记。在这研究,指向narG基因的教材的一个新集合被设计并且把使中毒反应的坡度胶化电气泳动(PCR-DGGE)试金用于嵌套半的聚合酶链。新教材的潜力在直接从在中央、南部的意大利散布的五个不同试验性的地点从土壤提取的DNA上被验证。教材的特性被切除决定,扩大,并且乐队定序由DGGE解决了。种系发生的分析显示出在从学习的土壤检索的序列和narG序列之间的关联从并且-Proteobacteria。这些教材扩展了存在为在土壤的减少硝酸盐的细菌的社区的尺寸和差异上的生态的学习的分子的工具。