简介：Viaseveraltechniquestomodifysensitivematrixforinhabitingtheleakageoffluorescentindicator,anewstablesensingmaterialformonitoringphosphateshasbeenpreparedandappliedtothemeasurementofphosphatesinartificialseawater.ItisbasedonthereactionofPO3-4withAl(Ⅲ)-Morinthatleadstothefluorescencequenchingofthecompositematrix.AtpHvalue4.0andthesalinityvalue25.0,theresponsetimeofoutputsignalhavingreachedthesteadystateislessthan300seconds.ItscalibrationgraphisgainedintherangeofH2PO-4massconcentrationfrom1.50to7.00μg/mLwiththelimitofdetection(3σ/K)0.02μg/mL.Whenitwasusedtomeasurephosphatesinartificialseawater,therecoveryrangedfrom96.78%to102.09%.Beingstoredunderthepropercondition,themembranesmaintainsensitivefor90-120days,andareabletobeusedfor50-80timeswithindicatorsupplement.

简介：Astudyonthetransportcharacteristicsofzincinlousoilwithphosphateatdifferentconcentrationswascarriedoutbythemethodofstepinput.Theeffectsofphosphateandtemperatureonzinctransportwerestudiedthroughanalysingthediffusion-dipsersioncoefficients(D)andtheretardationfactor(R)obtainedbytheprogramCXTFIT.TheresultsshowedthatDdecreasedandRincreasedwithincreasigconcentrationofphosphatesothativwasdifficultforzinctobreakthroughthesoilcolumn,andzincstoppedtobreakthroughthecolumnathightemperature.Oneorderequation,doubleconstantequationandtheElovichequationwereallsuitablefortheescriptionofzincdynamics.Effectsofphosphateandtemperatureonzinctransportwerefurtherconfirmedbytheanalysisonpseudo-thermodynamicparametersofzinctransport.

简介：Weinvestigatehigh-modulusdegradablematerialsintendedtoreplacemetalsinbiomedicalapplications.Thesearetypicallycompositescomprisingapolylactide(PLA)matrixreinforcedwithphosphateglassfibres,whichprovidereinforcementsimilartoE-glassbutareentirelydegradableinwatertoproduce,principally,calciumphosphate.Wehavemadecompositesusingavarietyoffibrearchitectures,fromnon-wovenrandommatstounidirectionalfibretapes.Flexuralpropertiesintheregionof30GPamodulusand350MPastrengthhavebeenachieved-directlycomparabletoquotedvaluesforhumancorticalbone.Incollaborationwithothergroupswehavebeguntoconsiderthedevelopmentoffoamedsystemswithstructuresmimickingcancellousboneandthishasshownsignificantpromise.Thefibresinthesefoamedstructuresprovideimprovedcreepresistanceandreinforcementoftheporewalls.Todatethematerialshaveexhibitedexcellentcellularresponsesinvitroandfurtherstudiesareduetoincludeconsiderationofthesurfacecharacterofthematerialsandtheinfluenceofthisoncellinteraction,bothwiththecompositesandtheglassfibresthemselves,whichshowpromiseasastandaloneporousscaffold.

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简介：INTRODUCTIONBonebiomaterialshavebeenwelldevelopedinrecentyearsandfrequentlyusedclinicallyinorthopedic,traumaticandodontologicalsurgeries.Amongst,bioceramicsissimilartothemineralconstituentsofourskeletonandhighlyappraisedduetoitsexcellentcharacteristicsinbio-compatibility,mechanicalandbio-degradableproperties,andbone-inductivity.

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简介：Theceramicsettingbindersobtainedbymeansoftherawmixmechano-chemicalprocessing(mechanicaldispersionandchemicalinteractionprocessescombination),usedforbondingrefractoryconcretes,becomemoreavailablewithasubsequentincreasedinterestintheirpropertiesbecausetheydevelopinitialstrengthduringaheatupoftheunitswithin8-10h,incontrastto24hafterplacementforhighAl2O3cements(HAC).Thisstrengthdevelopmentenableshightemperatureprocessingunitstoberelinedwithminimumturnaroundtime,thusprovidingafavoredcost/performanceratio.Thepresentpaperidentifiesthepredominantphosphatephasesresponsiblefordevelopinggoodmechanical-strengthpropertiesofzirconiaandaluminaconcretesbondedwithmechano-chemicalbinders.Itsetsoutthecolloidandcrystallinephasesresultedfrominterphaseinteractionthatprovidethebasisforhighconcentratedbondingsuspensions(HCBS)technologyusefultotherefractoryindustry.

简介：INTRODUCTIONCalciumphosphatecements(CPC)overcomethepracticaldisadvantagesofblocksorgranuleslcanbehandledasapasteandsitinsitu.TheirstructureandcompositionclosetothatofHAPmakethembiocompatiblematerials.2Theconventionalcalciumphosphatecementhadsomeproblemssuchaslongsettingtime(30～60min)andlowcompressivestrength,etc.Inoursystem,anα-TCP/TTCPpowdermixturewasmixedwithwatercontainingcitricacidtocontrolthesettingtimeandcompressivestrength.Inthispaper,theeffectsofvariousconcentrationcitricacidsolutionsonthepropertiesofthecementarereported.

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简介：Thedepletionrateofphosphateinthesoil-rootinterfacezoneincreasedalongwithgrowthandphosphateuptskeofwheatormaize,whichindicatedthatthephosphatedistributioninsoilneartherootsurfaceagreedwellwiththephosphatemovementinrhizosphereandphosphateuptakebyplant,Therelativeaccumulationzoneofphosphatewithin0.5mmapartfromtherootsurfacedevelopedatthe15thdayorsoaftercultivatingwheatormaizesincetherootphosphatesecretionincreasedgraduallyinthisstage.Thephosphatedistributioninthesoil-rootinterfacezoneagainstthegrowingtime(t)andthedistancefromtherootplane(x)couldbedescribedbythenon-linearregressionequationwiththethirdpowersofxandt.

简介：Refractiveindicesforcrystalsammoniumdihydrogenphosphate(ADP),30%deuteratedADP(DADP),50%DADP,and70%DADParemeasuredfrom253to1529nmwith5×10-6accuracy.Numericalfitstomodifieddouble-poleSellmeierequationaremade.Second-harmonicgeneration,third-harmonicgenerationphasematching(PM)angles,andnoncriticalPM(NCPM)wavelengthsarecalculatedusingtheSellmeierparameters.ThedeuteratedcrystalsshowsmallerPManglesthanpurecrystal.Fourth-harmonicgenerationprocesscanberealizedbyDADPinsmallerdeuteriumcontentthandeuteratedpotassiumdihydrogenphosphate(DKDP).ThemeasuredNCPMwavelengthsareconsistentwiththecalculatedvalue.PMcharacteristicsarecomparedbetweenDADPandDKDP.

简介：这份报纸报导为分层的alpha锆磷酸盐(伪-ZrP)的准备的一条新线路支持了metalloporphyrinMnTMPyP。MnTMPyP用伪-ZrP路BA被设置进伪-ZrP(即预先设置的bultylamine被一个单层模式在伪-ZrP安排)作为开始的材料。为homovanillic酸(HVA)的支持的材料的催化活动氧化被调查。结果在催化系统显示出有希望的分层的支持材料的催化剂。

简介：INTRODUCTIONTheinsolublephosphateswhichcannotbedirectlyabsorbedbyplantsarethemaiformsofinorganicphosphateinsoil.Thesekindsofphosphatescanbesolubilizedbyseveralspeciesofbacteriawhicharewidelyspreadinsoilespeciallyinrhizospherewhere70%ofthebacteriaarecapableofsolubilizinginorganicphosphate.Manyresearchersre-

简介：P2O5.BaO.Na2O.K2OglassesdopedwithvariouscontentofEu2O3werepreparedusinghightemperaturemeltingmethod,andtheEu2+ionsinthephosphateglasseswereobtainedwiththeaidofthereductiveactionofsiliconpowder.Thefabricatingconditions,fluorescence,excitationspectraoftheglasseswerethenstudied.Theglassescontainingeuropiumshowabroademissionbandat450nmandsharpbandsfrom580to650nm,andtheco-existenceofEu2+andEu3+isidentified.Also,agoodglasswithadominantproportionandlargequantityofEu2+ionscanbeobtainedbythereductiveactionofsiliconpowderandproperprocessing.

简介：InteractionsofN,PandKfertilizersinsoil-plantsystemsarewidelyrecognized.Thisstudyfocusedonthetransformationsofmonocalciumphosphate(Ca(H2PO4)2)(MCP)withco-applicationofammoniumandpotassiumfertilizersinthreedifferentsoils.Theresultsshowedthatafter1dincubationalargeportionoftheMCPappliedinthepaddy,calcareousandredsoilsbecamethewater-insolubleformandtherecoveriesofPappliedasOlsenPvariedgreatlyinthesethreesoils.Applicationofammoniumsulfate((NH4)2SO4)(AS)orpotassiumchloride(KC1)reducedWSPsignificantlyinthesoilswithASmoreeffectivethanKC1inthecalcareoussoil,whilethereverseoccurredintheredsoil.Meanwhile,inthepaddysoil,co-applicationofthetwofertilizersreducedWSPmorethanwhenthefertilizerswereappliedindividually.Theco-applicationofASwithMCPinthepaddyandcalcareoussoilssignificantlyreducedOlsenP,buttheoppositeoccurredintheredsoil.Theexperimentontheeffectofdifferentaccompanyinganionsshowedthattheammoniumfertilizers(PNC1andPNS)reducedWSPmoreeffectivelythanthecorrespondingpotassiumfertilizers(PKC1andPKS)inthecalcareoussoilduetothedifferenceofthecations,whereasintheredsoil,thechloridesreducedWSPmoreeffectivelythanthesulfates.Overall,co-applicationofammoniumorpotassiumfertilizerswithMCPsignificantlydecreasedavailabilityofPfromMCPduringitstransformationinsoils,especiallywhenMCPwasappliedincombinationwithammoniuminthecalcareoussoil.

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简介：Biogeochemicalcharacterofdissolvedinorganicnitrogenandphosphateatplumefrontisstudiedbasedonthedata,whichwereobservedintheChangjiangRiverEstuaryin1988.Theresultsareasfollows:Theconcentrationsofnitrateandphosphatechangeabruptlyatplumefrontandhalocline.TheconcentrationsofNO-2andNH+4areveryhighat10～25mdepth.TheverticalcircumfluencetransportsNO-3andPO3-4,whicharereleasedfromorganismsatthebottomtophytoplankton.

简介：Thepurposeofthisresearchistoinvestigatethepotentialofpre-treatmentwithphosphoricacid(PA)andmonobasiccalciumphosphate(MCP)forthestabilizationofheavymetalsinsludgeanditsbottomash.ThetannerysludgesampleswerecollectedinWenzhou,Chinaandheavilycontaminatedwithheavymetals,suchasPb,Crandsoon.Thesampleswerepre-treatedwithPAorMCP.ThenXRDandTCLPtestswereadoptedastheevaluatingmethodstocharacterizethePb,Cr,Cu,ZnandCdimmobilizationinthepre-treatedsludgeanditsbottomash.TheresultsshowedthatthistreatmenteffectivelyimmobilizedPbandCdinthesludge,lightlystabilizedthemetalCu,andadversely,enhancedtheleachabilityofZn.Afterincinerationat900℃,PbandCrinthebottomashofpre-treatedsludgeweresignificantlystabilizedduetotheformationoftheirhighlythermostablephosphatesandpyromorphite-likemineralsduringtheincinerationprocess.However,anincreaseofCuandZnsolubilitywasobservedwhichmightbeattributabletotheacidificationofsludgeduetotheadditionofPAorMCP.

简介：Inthispaper,anewcomplexinorganicionexchangerTitaniumPhosphate-AmmoniumTungstophosphate(abbreviatedasTip-AWP)wassynthesized,whoseexchangecharacterandchemicalstructurewerestudied.ThiscompoundexhibitshighexchangecapacityandselectivityforCs^+,itsexchangecapacityaccains0.95mmol/ginthemediumof0.1mol/LHNO3,andwhichalmostdoesn′tchangeinthe1AWimitatedwastesolution.Therearenochangeinexchangecapacityandstructuteafterseveraltimesofexchanging,eluting,regenerating,whichisofgreatimportancetotheseparationanduptakingofradio-nuclides.Furthermore,thisexchangerhasgoodthermalandredioactivestability.

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