简介：Carbonnanotube(CNT)-supportedRunanoparticleswithmeansizesrangingfrom2.3to9.2nmwerepreparedbydifferentpost-treatmentsandstudiedforFischer-Tropsch(FT)synthesis.TheeffectsofRuparticlesizeoncatalyticbehaviorswereinvestigatedatbothshorterandlongercontacttimes.Atshortercontacttime,wherethesecondaryreactionswereinsignificant,theturnoverfrequency(TOF)forCOconversionwasdependentonthemeansizeofRuparticles;TOFincreasedwiththemeansizeofRuparticlesfrom2.3to6.3nmandthendecreasedslightly.Atthesametime,theselectivitiestoC5+hydrocarbonsincreasedgraduallywiththemeansizeofRuparticlesupto6.3nmandthenkeptalmostunchangedwithafurtherincreaseinRuparticlesize.Atlongercontacttime,C10-C20selectivityincreasedsignificantlyattheexpenseofC21+selectivity,suggestingtheoccurrenceoftheselectivehydrocrackingofC21+toC10-C20hydrocarbons.

简介：UV-visandluminescencespectroscopictitrationexperimentsshowthatanovelRu(Ⅱ）complexexhibitsoff-on-offpHluminescentswitchingwithamaximumon-offrationofabout100.

简介：在现在的工作，一系列Ta/Ru/Co-23?at%Pt有改变的Ruunderlayer厚度的薄电影被磁控管劈啪作响制作。所有这些电影证明c轴比较喜欢对电影表面垂直的取向。c/a比率和有Ruunderlayer厚度的增加的埃及土人层的格子扩大的落下被X光检查衍射(XRD)揭示。Ta/Ru/Co-Pt薄电影的coercivity与Ruunderlayer厚度增加急速地增加，由于有效磁电机水晶的anisotropy常数的改进和磁性的nano谷物的交换去耦。有效磁电机水晶的anisotropy常数的改进被错配Ru层和埃及土人表面归功于到埃及土人层的格子变丑。而且，磁性的nano谷物的交换去耦被归因于磁性的nano谷物的进一步的隔离。

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简介：大音阶的第五音胶化旋转涂层在Pt/Ti/SiO2/Sisubstrate上准备的Pb(Zr0.4Ti0.6)O-3电影作为最高的电极与磅或Ru被用于铁电体电容器。为thePt/PZT/Pt和Ru/PZT/Pt铁电体电容器，尽管与一样的铁电体他，不同最高的电极材料招致PZT电容器的不同性质例如疲劳，漏，残余、浸透的极化，除了PZTfilm的类似的水晶取向。在(10)10交换周期以后，Ru/PZT/Pt和Pt/PZT/Ptcapacitors的残余的极化分别地减少到70%和84%。在(8)10交换周期以后，后者的漏水流密度在积极偏爱显然增加，与前者相比。为最高的电极的Differentmaterials在PZT/top电极接口带不同条件。在PZT/electrode接口和在到充电注射的PZT/electrode接口的电极材料的氧化物的影响的氧空缺集中的Theinfluence能作为最高的电极与磅或Ru解释PZT电容器的性质的差别。

简介：TheeffectofacidcomponentincludingvariousconventionalacidsandtungsticcompoundsonglucosehydrogenationoveraseriesofbinarycatalystsystemcontainingRu/Ccatalystwasinvestigated.TheresultsshowedthatHCl,H2SO4,H3BO3,H3PO4,andHNO3hadnegligibleeffect,whileallthetungsticcompoundsimposedinhibitingeffectsonthehydrogenationofglucoseoverRu/Ccatalyst,andthesuppressingeffectfollowedtheorderofH2WO4>HPW>WO3>AMT>HSiW.Thisorderisthesameastheorderofethyleneglycol(EG)yieldsintheone-potconversionofglucosetoEG,suggestingtheimportantroleofcompetitionbetweenglucosehydrogenationandretro-aldolcondensationincontrollingtheselectivityofEG.

简介：Highspinstatesintheneutron-rich^108Runucleushavebeenstudiedthroughmeasuringpromptγ-raycoincidencesfollowingthespontaneousfissionof^252CfwiththeGammaspheredetectorarray.Theyrastbandhasbeenconfirmed.Theone-phononγ-vibrationalbandandthetwo-quasiparticlebandbasedonthe5^-levelhavebeenextendedupto13^+and15^-,respectively.Inaddition,twolevelsat1644.8keVand1826.5keVexcitationenergiesarenewlyidentifiedandproposedtobethemembersofatwo-phononγ-vibrationalband.Itisshownthatthe^108Runucleushastriaxialdeformationwithparametersβ2～0.29andγ=-22°fromthetotalRouthiansurfacecalculations.Theobservedbandcrossingintheyrastbandisduetothealignmentofapairofh11/2neutronsaccordingtothecrankedshellmodelcalculations.Thepossibleconfigurationforthetwo-quasiparticlebandhasbeendiscussed.

简介：Bimetalliccobalt-rutheniumnanocatalystssupportedoncarbonnanotubes(CNTs)arepreparedusingmicroemultiontechniquewithwater-to-surfactantratiosof0.5—1.5.ThenanocatalystswereextensivelycharacterizedbydifferentmethodsandtheiractivityandselectivityinFischer-Tropschsynthesis(FTS)havebeenassessedinafixed-bedmicroreactor.Thephysicochemicalpropertiesandperformanceofthenanocatalystswerecomparedwiththecatalystpreparedbyimpregnationmethod.Verynarrowparticlesizedistributionhasbeenproducedbythemicroemulsiontechniqueatrelativelyhighloadingsofactivemetals(15wt%Coand1wt%Ru).AccordingtoTEMimages,smallCoparticles(2—7nm)weremostlyconfinedinsidetheCNTs.Comparingwiththecatalystpreparedbyimpregnation,theuseofmicroemulsiontechniquewithwatertosurfactantratioof0.5decreasedtheaveragecobaltoxideparticlesizeto4.8nm,thedispersionwasalmostdoubledandthereductionincreasedby28%.Activityandselectivitywerefoundtobedependentonthecatalystpreparationmethodandwater-to-surfactantratio(aswellascobaltparticlesizes).COconversionincreasedfrom59.1%to75.1%andtheFTSrateincreasedfrom0.291to0.372gHC/(gcath).C5+liquidhydrocarbonsselectivitydecreasedfrom92.4%to87.6%.

简介：AbstractObjective:Mifepristone (RU486), one of the most common medications for artificial abortion, attenuates the immunoregulatory effects of progesterone. However, the specific immune regulatory mechanism of RU486 in abortion remains unknown. We intended to investigate the immunomodulatory effects of RU486 on abortion.Methods:Sixty female mice were divided into the control group (0 mg RU486) and RU486 group (2 mg/kg RU486). The uterus, peripheral blood, and spleen were obtained for isolation of specific cell types. The population and phenotype of immune cells in the decidua, peripheral blood, and spleen were analyzed using flow cytometry. Statistical differences between groups were determined using two-tailed t-test. For all statistical tests, P < 0.05 was considered statistically significant.Results:RU486 effectively induced abortion in pregnant mice, with a significantly higher number of decidual macrophages (dMφ) (control group = 25.55% ± 2.467%, RU486 group = 19.41% ± 1.423%; P < 0.05), especially the major histocompatibility complex IIhigh subset. No difference in Mφ number was observed in the spleen or peripheral blood. Moreover, the dMφ from mice with RU486-induced abortion displayed a remarkable activated phenotype, with increased expressions of inducible nitric oxide synthase, tumor necrosis factor-α, and interleukin (IL)-12 but decreased expressions of arginase-1 and IL-10. We also found elevated levels of decidual CD4+ T-cells in the RU486 group that exhibited a higher level of the proinflammatory cytokine interferon-γ and a lower level of the anti-inflammatory cytokines, IL-4 and IL-10.Conclusions:We report a new mechanism of RU486-induced abortion via the regulation of innate cell Mφ activation and the adaptive response of CD4+ T-cells present in the decidua but not the periphery.

简介：Emissionquenchingof[Ru(bpy)2(4,4’-dcbpy)](PF6)2(1)bybenzenamine,4-[2-[5-[4-[4-dimethylamino]phenyl]-4,5-di-hydro-1-phenyl-1H-pyrazol-3-yl]-ethenyl]-N,N-dimetyl(2)or1,5-diphenyl-3-(2-phenothiazine)-2-pyrazoline(3)wasobserved.Measurementsoftheemissiondecayof1beforeandafteradditionof2or3bysinglephotoncountingtechniquecon-finnedtheobservations.Theemissionquenchingof1by2or3wassubmittedtoStern-Volmerequation.Itwascalculatedthatthequenchingrateconstants(kq)are5.5×109(mol/L)-1s-1for2and4.0×109(mol/L)-1s-1for3,respectively.Theseresultsindicatedacharacterofdynamicquenchingprocess.Thesinglet-stateof2or3wasalsoquenchedby1.ThequenchingbehaviorsdidnotconformtotheStern-Volmerequationandinvolvedbothstaticanddynamicquenchingprocesses.Theapparentquenchingrateconstant(kapp)wascalculatedtobe3×109(mol/L)-1fortheinteractionofexcited2with1,and1.2×109(mol/L)-1forthatofexcited3wit

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简介：（CO＋Cs)/Ru(101^-0)共吸附的体系中，CO分子由于受Cs原子强烈影响，分子轨道发生重新杂化组合。CO分子原来在清洁Ru(101^-0)表面上结合能位于7.5eV处相重叠的5σ和1π轨道对应谱峰分裂为两峰，结合能分别位于6.3和7.8eV处，其中6.3eV处的谱峰来自CO分子1π轨道的一支，它显示出该分子轨道沿衬底＜0001＞晶向的镜面反对称性。CO分子1π轨道的另一支和5σ轨道在结合能7.8eV处相重叠。

简介：Synthesis,structureandmagneticpropertiesofRudopedperovskitestructuredmanganiteLa0.5Sr0.5MnO3wereinvestigatedexperimentally.Ahydrothermalmethodwasusedforthepreparationofthesamples.Ahigh-temperatureannealingprocesswasalsoemployedtomakeacomparison.AslightlyenhancementoftheunitcellvolumewasobservedwiththeincreaseofRuconcentration.Scanningelectronmicroscopyshowsthatthematerialsaremadeupofcube-shapedparticleswithdimensionofseveralmicrometers.Importantly,itisfoundthatboththeCurietemperatureTCandsaturationmomentcanbereducedbyRudoping.ThevalueofcoercivefieldisnotaffectedbytheintroductionofRu.

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简介：Aseriesof3wt%Ruembeddedonorderedmesoporouscarbon(OMC)catalystswithdifferentporesizeswerepreparedbyautoreductionbetweenrutheniumprecursorsandcarbonsourcesat1123K.RunanoparticleswereembeddedonthecarbonwallsofOMC.CharacterizationtechnologiesincludingpowerX-raydiffraction(XRD),nitrogenadsorption-desorption,transmissionelectronmicroscopy(TEM),andhydrogentemperature-programmedreduction(H2-TPR)wereusedtoscrutinizethecatalysts.ThecatalystactivityforFischer-Tropschsynthesis(FTS)wasmeasuredinafixedbedreactor.Itwasrevealedthat3wt%Ru-OMCcatalystsexhibitedhighlyorderedmesoporousstructureandlargesurfacearea.Comparedwiththecatalystswithsmallerpores,thecatalystswithlargerporeswereinclinedtoformlargerRuparticles.These3wt%Ru-OMCcatalystswithdifferentporesizesweremorestablethan3wt%Ru/ACcatalystduringtheFTSreactionsbecauseRuparticleswereembeddedonthecarbonwalls,suppressingparticlesaggregation,movementandoxidation.ThecatalyticactivityandC5+selectivitywerefoundtoincreasewiththeincreasingporesize,however,CH4selectivityshowedtheoppositetrend.ThesechangesmaybeexplainedintermsofthespecialenvironmentoftheactiveRusitesandthediffusionofproductsintheporesofthecatalysts,suggestingthattheactivityandhydrocarbonselectivityaremoredependentontheporesizeofOMCthanontheRuparticlesize.

简介：应用量子化学ＤＶＸα方法对钌系氰氯络合物进行了系统的理论计算和解析，确定了相应的稳定几何形态和微观电子结构，为合成、应用和深入研究它们的性能提供了重要的理论依据．

简介：极其细小磨擦非结晶的合金催化剂被化学减小与KBH4准备。在在气压的cinnamaldehyde的液体阶段加氢期间，Ru-B催化剂准备了展出优秀选择到cinnamyl酒精。当加氢与超声的照耀被执行时，当到cinnamyl酒精的选择仍然保持几乎未改变时，反应率能极大地被提高。加氢率随超声的频率或照耀时间的增加被增加。根据各种各样的描述，例如XRD，XPS，TEM，赌注和ICP，结构、电子的特征上的超声的照耀的效果磨擦催化剂简短被学习。同时，催化表演上的ultrasonication的提升效果也基于cinnamaldehyde的选择加氢被讨论到cinnamyl酒精。

简介：用同步辐射角分辨紫外光电子谱对CO与Cs在Ru(1010）面上共吸附的研究结果表明：由于Cs的强烈影响，CO的分子轨道重新排列。对应清洁表面上CO分子的（5σ＋1π）轨道的7．5eV谱峰分裂成两个，分别处于6．3和7．8eV，6．3eV谱峰关于一个垂直于Ru(1010)面面平行于＜0001＞晶向的镜像面反对称性。

简介：随着生物柴油的产量急剧增加,其副产物甘油的利用成为国内外研究的焦点。本实验考察了不同Ru金属的负载量对Ru-Ir-ReOx/SiO2催化甘油原位产氬制1,2-丙二醇的影响。在Ru负载量为0.5wt%时,反应时间为61h,反应温度为190℃,甘油转化率可达37%。增加催化剂的量后,甘油的转化率提升至54%,1,2-丙二醇和丙酮醇的选择性分别为34.5%和30.7%。

简介：Aseriesofhighsurfaceareagraphiticcarbonmaterials(HSGCs)werepreparedbyball-millingmethod.EffectofthegraphiticdegreeofHSGCsonthecatalyticperformanceofBa-Ru-K/HSGC-x(xistheball-millingtimeinhour)catalystswasstudiedusingammoniasynthesisasaprobereaction.ThegraphiticdegreeandporestructureofHSGC-xsupportscouldbesuccessfullytunedviathevariationofball-millingtime.RunanoparticlesofdifferentBa-Ru-K/HSGC-xcatalystsarehomogeneouslydistributedonthesupportswiththeparticlesizesrangingfrom1.6to2.0nm.ThegraphiticdegreeofthesupportiscloselyrelatedtoitsfacileelectrontransfercapabilityandsoplaysanimportantroleinimprovingtheintrinsiccatalyticperformanceofBa-Ru-K/HSGC-xcatalyst.更多还原