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简介：TheeffectsofLaonsomehydrolyticenzymeactivitiesinredsoilwerestudiedinincubationandpetcultureexperiments.Intheincubationexperiment,Laslightlystimulatestheactivitiesofureaseandacidicphosphataseinsoilandstronglystimulatessucraseactivityinsoil.Inthepetcultureexperiment,Lastimulatestheactivitiesofurease,acidicphosphataseandsucrasetodifferentdegrees.Thestimulativeeffectsofrareearthelements(REE)onhydrolyticenzymeactivitiesinsoilmayresultinincreasingyieldofeivps.

简介：Rareearthcompoundsasmodifiersusedwidelyinmodernfrictionmaterialscanenhancetheinterfacialbindingofconstituentsofmaterialsandimprovethecomprehensivepropertiesofmaterialsevidently.However,therearestillfewreportsonapplicationofrareearthinautomotivefrictionmaterials.Inordertostudytheeffectmechanismofrareearthsinfrictionmaterials,arareearthcompoundwasselectedasadditiveandtheeffectsofmaterialsdopedwithorwithoutrareearthonfrictionandwearpropertiesofmaterialswerestudied.Themicrostructureandwornsurfacemorphologywereobservedbyscanningelectronmicroscopyandthemacroperformancewasdiscussed.Wornsurfaceelementconstitutionofmaterialswasanalyzedbyenergydispersivespectroscopy.Effectmechanismofrareearthsonfrictionandwearbehaviorsoffrictionmaterialswerediscussed.Theresultsshowthatdopingrareearthsinfrictionmaterialscanstabilizefrictioncoefficient,lowerthewearrateofmaterialsandincreasetheimpactstrengthofmaterials.Theflexibilityandfractureresistanceofmaterialsisgreatlyimproved.Wornsurfaceofmaterialsdopedwithrareearthiscompactandthesurfaceadhesionisgreatlyenhanced.

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简介：Theslowtensiletests,dynamichydrogenchargingtensiletestsandhydrogenevolutiontestsafterhydrogenchargingwereusedtostudytheeffectsofrareearthmetal(REM)onhydrogenbehaviourinasteel16Mn(St.52).TheratiosofRE/Swerechosenas0,0.7,2.2and7.7,respectively.ItwasshownthatthesteelwithRE/S=2.2givealowerhydrogenembrittlementsusceptibilitythanothers.ThesteelswithoutREMcanadsorbmuchmoreamountofhydrogenthanthatwithREMunderthesamehydrogenchargingconditions.Andtheamountofadsorbedhydrogenfortheforinercanbeevolvedeasierthanthatforthelatteratroomtemperature,50℃and80℃,respectively.Theexperimentalresultswereexplainedbythetraptheoryofhydrogen,theshort-circuitdiffusionpathsintheinterfacesbetweentheelongatedMnSinclusionsandthematrix,andstrongabilityofREMtoadsorbhydrogen.

简介：Ceriasphereswithdifferentsizesandsulfurizedproductswithcorrespondingmorphologywerepreparedbyhydrothermalandgas-solidreactionmethodat600–800°CunderCS2atmosphereforashorttime,respectively.Dimensionaleffectinpreparationofγ-Ce2S3wasfirstlyinvestigatedbymeansoftechniquessuchasscanningelectronmicroscopy(SEM),X-raydiffraction(XRD),thermalgravimetricanalysis(TGA)andspectrophotometer.Theresultsshowedthatwhenceriananoparticleswithsmallsizewereusedasprecursors,theγ-Ce2S3couldbepreparedatthelowertemperatureandthebadlysinteredproductswereobtained;whenceriananoparticleswithlargesizewereemployedasprecursors,pureγ-Ce2S3wasdifficultlyobtainedevenifthetemperaturewasupto800°Candtheproductstendedtokeeptheiroriginalsize.Theheat-resistancepropertyoftheγ-Ce2S3withlargesizewasbetterthanthesmallerone,andthepureγ-Ce2S3preparedfromprecursorwithsmallsizehadagoodpigmentaryperformance.

简介：ViciafabaL。幼苗水耕法地在体外的镧(La)的012mg/L被栽培让15d调查ecotoxicological效果并且冒险对稀土元素元素(REE)的评价。结果显示出象superoxide基那样的那反应的氧种类(ROS)生产(O2吗？？

简介：CeO2nanoparticles(nano-CeO2p)wereaddedintolasercladdedNiCoCrAlYcoatingsonNi-basedsuperalloysubstratetoimprovethemicrostructureandproperties.Scanningelectronmicroscope(SEM),X-raydiffractometer(XRD),micro-hardnesstester,andheattreatmentfurnacewereemployedtoinvestigatetheirmorphologies,phases,micro-hardnessandthermalshockresistance,comparedwiththecoatingwithoutnanoparticlesadded.Theresultsshowedthatthemicrostructureandpropertiesofthecoatingswiththeaddition...

简介：拥有做位置的不同Ce的Pd和PdPt催化剂的物理化学的性质被TEM，XRD，N2吸附解吸附作用，XPS和英尺红外的技术调查。为甲醇总数氧化的催化表演被检验学习增加位置的Ce的效果。CeO2艾尔2O3Ce直接被介绍进支持的TiO2(猫)催化剂比CeO2/Al22选择>O3Ce被受精在装载的TiO2(Ce/AT)样品方法。描述结果表明做位置的Ce不引起基本水晶的阶段的明显的另一和支持的mesoporous结构。然而，做位置的Ce影响支持的毛孔形状然后影响毛孔直径。猫催化剂拥有更丰富的吸附的氧和更多Ti3+能在催化剂表面上把更气体的氧转变成活跃的氧种类，它对反应有益。在猫的AlOTi桥便于艾尔和Ti种类的合作，它进一步加快反应率。

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简介：在这份报纸，有石墨(C)或碳nanotubes(CNT)的增加的SmCo6.9Hf0.1当演员组合金和带子被融化的弧和融化旋转分别地准备。补充说结构和磁性SmCo6.9Hf0.1上的碳借助于X光检查衍射(XRD)被调查的效果，扫描电子显微镜学(SEM)，传播电子显微镜学(TEM)，磁性的力量显微镜学(MFM)和颤动的样品磁强计(VSM)。尽管他们的水晶结构作为一样的Sm被描绘，微观结构和SmCo6.9Hf0.1带子的磁性的结构由于C或CNT的介绍显然被改变，这被发现尽管他们的水晶结构作为一样的Sm被描绘(公司，Hf)7单个阶段，不管碳被增加。作为结果，包含碳的带子的磁性在某个度被提高。这被认为与精制equiaxed谷物，小领域尺寸和C或CNTs富有的区域的卡住的效果有关。SmCo6.9Hf0.1(CNT)的磁性0.05条带子到达了Hc=12.5kOe，Mr=57.0emu/g和Mr/M2T=0.788。

简介：Sm0.5Sr0.5CoO3的样品在不同气氛(Ar，N2，和O2)和温度被退火(4001200?獡吗？

简介：Praseodymium(Pr)wasimpregnatedtoCeO2-ZrO2solidsolutionbyanimpregnationmethod.Theas-obtainedPrmodifiedCeO2-ZrO2wasimpregnatedwith1wt.%Pdtopreparethecatalysts.ThestructureandreducibilityofthefreshandhydrothermallyagedcatalystswerecharacterizedbyX-raydiffraction(XRD),Raman,X-rayphotoelectronspectroscopy(XPS),COchemisorptionandH2temperature-programmedreduction(H2-TPR).Theoxygenstoragecapacity(OSC)wasevaluatedwithCOservingasprobegas.EffectsofimpregnatedPronthestructureandoxygenstoragecapacityofcatalystswereinvestigated.TheresultsshowedthattheagedPr-impregnatedsampleshadmuchhigherOSCandbetterreducibilitythantheunmodifiedones.TheschemeofstructuralevolutionsofthecatalystswithandwithoutPrwasalsoestablished.PartialoftheimpregnatedPrdiffusedintothebulkofCeO2-ZrO2duringageing,whichinhibitedthesintering,andincreasedtheamountofoxygenvacanciesinCeO2-ZrO2support.Furthermore,thoseimpregnatedPrspecieswhichcoveredonthesurfaceofthesupportobstructedthestrongmetal-supportinteractionbetweenPdandCesoastoreducetheencapsulationofPdaswellasthebackspill-overoftheoxygenduringthecatalyticprocess.

简介：为水气体移动(WGS)反应的多重金属的催化剂(Ni-Mn-Ce-K/bauxite)被受精准备，并且催化结构和性质被N2调查物理，XRD，H2-TPR，和CO-TPD。结果显示7.5%CeO2的增加显然改进了WGS反应的活动，并且也增加了特定的表面区域和催化剂的毛孔体积。CeO2的增加减少减小温度，提高了H2O的吸附和激活，并且而且改进了公司的吸附内容，活跃地点没被改变，催化剂上的活跃地点的数字没显然增加。

简介：做Gd或做Lu的长晚霞红黄磷Y2O2S:Sm(3+)用高温度流动熔化方法被综合。获得的黄磷用X光检查衍射被分析决定晶体结构，并且阶段分析产品在单个阶段的表演。光系列和腐烂曲线在一个日立F-4500荧光分光光度计上被测量。腐烂时间在一个ST-900PM弱轻光度计上被决定。分析证明陆做的那位主人改进材料的光和腐烂时间。做的陆和Sm的集中被改变以便决定最佳的条件并且综合有最好的性质的产品。长晚霞的机制简短也被讨论。

简介：(Cu60Zr30Ti10)98Y2bulkmetallicglass(Φ4mm×70mm)wasobtainedsuccessfullybycoppermouldcoolingandspraying-casting,andsomesampleswereisothermallyannealedattemperaturesof473and623K,whichwaslowerthantheglasstransitiontemperature(Tg)for1h.Microstructureandpropertiesofas-castandannealedsampleswerestudied.Crystallizationphases(Cu10Zr7andCuZr)wereobservedinannealedsamples,andthespeciesandfractionofthesephasesincreasedwithincreasingannealingtemperature.Mic...