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
简介:摘要目的探讨1010例妇科门诊患者阴道分泌物检查结果分析。方法回顾性分析2017年1月~2017年12月我院妇科1010例门诊患者的阴道分泌物检查结果。结果在妇科门诊患者阴道分泌物检查的1010例患者中,阴道清洁度Ⅰ度患者有9例,检出率为0.79%;阴道清洁度Ⅱ度患者有33例,检出率为2.77%;阴道清洁度Ⅲ度患者有165例,检出率为14.65%;阴道清洁度Ⅳ度患者有803例,检出率为21.39%。组间比较差异有统计学意义(P<0.05)。结论阴道分泌物检查可作为门诊妇科常规诊疗手段的首选方法,能及时发现妇女的身体情况,在临床初筛妇科感染性疾病、临床用药指导方面具有较高的临床价值。
简介:Synthesis,structureandmagneticpropertiesofRudopedperovskitestructuredmanganiteLa0.5Sr0.5MnO3wereinvestigatedexperimentally.Ahydrothermalmethodwasusedforthepreparationofthesamples.Ahigh-temperatureannealingprocesswasalsoemployedtomakeacomparison.AslightlyenhancementoftheunitcellvolumewasobservedwiththeincreaseofRuconcentration.Scanningelectronmicroscopyshowsthatthematerialsaremadeupofcube-shapedparticleswithdimensionofseveralmicrometers.Importantly,itisfoundthatboththeCurietemperatureTCandsaturationmomentcanbereducedbyRudoping.ThevalueofcoercivefieldisnotaffectedbytheintroductionofRu.
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: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:Twomajorbacterialblight(BB)resistancegenes(Xa21andxa13)andamajorgeneforblastresistance(Pi54)wereintrogressedintoanIndianricevarietyMTU1010throughmarker-assistedbackcrossbreeding.ImprovedSambaMahsuri(possessingXa21andxa13)andNLR145(possessingPi54)wereusedasdonorparents.Marker-assistedbackcrossingwascontinuedtillBC2generationwhereinPCRbasedfunctionalmarkersspecificfortheresistancegeneswereusedforforegroundselectionandasetofparentalpolymorphicmicrosatellitemarkerswereusedforbackgroundselectionateachstageofbackcrossing.SelectedBC2F1plantsfrombothcrosses,havingthehighestrecoveriesofMTU1010genome(90%and92%,respectively),wereintercrossedtoobtainintercrossF1(ICF1)plants,whichwerethenselfedtogenerate880ICF2plantspossessingdifferentcombinationsoftheBBandblastresistancegenes.AmongtheICF2plants,seventriplehomozygousplants(xa13xa13Xa21Xa21Pi54Pi54)withrecurrentparentgenomerecoveryrangingfrom82%to92%wereidentified.AllthesevenICF2plantsshowedhighresistanceagainstthebacterialblightdiseasewithalesionlengthsofonly0.53–2.28cm,1%–5%diseaseleafareasanddiseasescoringvaluesof‘1'or‘3'.ThesevenICF2plantswereselfedtogenerateICF3,whichwerethenscreenedforblastresistance,andallwereobservedtobehighlyresistanttothediseases.SeveralICF3linespossessinghighlevelofresistanceagainstBBandblast,coupledwithyield,grainqualityandplanttypeonparwithMTU1010wereidentifiedandadvancedforfurtherselectionandevaluation.
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%。