学科分类
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7 个结果
  • 简介:在这份报纸,我们证明没有邻近的短周期的2-degenerate图和一些平面图是有大尺寸和最大的度的-edge-choosable,和一些平面图是的组((G)+1)组(G)-edge-choosable。

  • 标签: 平面图形 短周期 可选性 短边 可选择
  • 简介:我们使用对扩大holographicRicci黑暗精力(ERDE)诊断的statefinder模型没有并且与到学习的相互作用他们的行为。我们为不同盒子阴谋各种各样的参数的轨道。非交往的模型不到达LCDM点,这被显示出{1,0}并且因为相互作用做statefinder对的进化,交往的被赞成{r,s}相当不同。

  • 标签: 能量模型 利玛窦 诊断 全息 相互作用
  • 简介:ObjectivesToassesswhetherstatinsreduceall-causemortalityandCVeventsinelderlypeoplewithoutestablishedCVdisease.BackgroundSinceageingofthepopulationissteadilyraising,preventionofcardiovascular(CV)diseaseintheelderlyisrelevant.InelderlypatientswithpreviousCVevents,useofstatinsisrecommendedbyguidelines,whereasbenefitsofthesedrugsinelderlysubjectswithoutpreviousCVeventsarestilldebated.MethodsRandomizedtrialscomparingstatinsversusplaceboandreportingall-causeandCVmortality,myocardialinfarction(MI),stroke,andnewcanceronsetinelderly(>65yearsold)subjectswithoutestablishedCVdiseasewereincluded.ResultsEighttrialsenrolling24,674subjects(42.7%females;meanage73.0+2.9;meanfollow-up3.5+1.5years)wereincludedinanalyses.Statins,comparedtoplacebo,significantlyreducedtheriskofMIby39.4%(relativerisk[RR]:0.606[95%confidenceinterval(CI):0.434to0.847];P=0.003),aswellastheriskofstrokeby23.8%(RR:0.762[CI:0.626to0.926];P=0.006).Incontrast,theriskofall-causedeath(RR:0.941[CI:0.856to1.035];P=0.210)andofCVdeath(RR:0.907[CI:0.686to1.199];P=0.493)werenotsignificantlyreduced.Newcanceronsetdidnotdifferbetweenstatin-comparedtoplacebotreatedsubjects(RR:0.989[CI:0.851to1.151];P=0.890).ConclusionsPInelderlysubjectsathighCVriskwithoutestablishedCVdisease,statinssignificantlyreducetheincidenceofMIandstroke,butdonotsignificantlyprolongsurvivalintheshort-term.

  • 标签: 心血管疾病 老年人 绸缎 他汀类药物 死亡率
  • 简介:ThedetailedreactionpathwayandcokeformationmechanismoverPt/metaloxidenanoparticlesduringthesteamreformingofethanol(SRE)at300℃werestudied.ThecatalystswerepreparedbyincipientwetnessimpregnationmethodandwerecharacterizedwithCOpulsechemisorption,BETsurfacemeasurement,oxygenadsorption,ethanol-TPD,NH3-TPD,andTPO.TheSREactivityofthecatalystswithsteam/ethanolmolarratioof3/1wastestedusingacontinuousfixed-bedreactor.StronginteractionbetweenPtandsupportscauseslowerH2productiontemperaturesandnoC2H4formation,whileweakinteractionleadstoC2H4formationandstrongbondedCOonPtparticlesduringethanol-TPD.H2productionoverPt-basedcatalystsismainlyresultedfromthedecompositionanddehydrogenationofethanol,anddecarbonylationofacetaldehyde.Meanwhile,cokecanbeformedfromacetaldehyde,acetone,C2H4andCO.However,whentheinteractionbetweenPtandsupportsisweak,morecokeisformedespeciallyfromacetone,C2H4andCO.Whentheinteractionisstrong,nocokeformationisobservedduetohighoxygenstoragecapacityofthecatalyst.

  • 标签: 活性位点 乙醇 焦炭 产氢 强相互作用 NH3-TPD
  • 简介:Inducedembryonicstemresourcesfortheobservationofthecell(ES)cellsareexpectedtobepromisingcellbehaviorsindevelopmentalbiologyaswellastheimplantationincelltreatmentsinhumandiseases.ArecombinantE-cadherinsubstratumwasdevelopedasacellrecognizablesubstratumtomaintaintheEScells'self-renewalandpluripotencyatsinglecelllevel.Furthermore,thegenerationofvariouscelllineagesindifferentgermlayers,includinghepaticorneuralcells,wasachievedonthechimericproteinlayerpreciselyandeffectively.Theinductionandisolationofspecificcellpopulationwascarriedoutwiththeenhancingeffectofotherartificialextracellularmatrices(ECMs)inenzyme-freeprocess.ThemurineEScell-derivedcellsshowedhighlymorphologicalsimilaritiesandfunctionalexpressionstomaturedhepatocytesorneuralprogenitorcells.

  • 标签: CELL adhesion molecule EMBRYONIC stem CELL