简介:Basedonthedensity-functionaltheory,thispaperstudiesthegeometricandmagneticpropertiesofTinO(n=1-9)clusters.TheresultinggeometriesshowthattheoxygenatomremainsonthesurfaceofclustersanddoesnotchangethegeometryofTinsignificantly.Thebindingenergy,second-orderenergydifferenceswiththesizeofclustersshowthatTi7Oclusterisendowedwithspecialstability.ThestabilityofTinOclustersisvalidatedbytherecenttime-of-flightmassspectra.ThetotalmagneticmomentsforTinOclusterswithn=1-4,8-9areconstantwith2anddroptozeroatn=5-7.Thelocalmagneticmomentandchargepartitionofeachatom,andthedensityofstatesarediscussed.ThemagneticmomentoftheTinOisclearlydominatedbythelocalized3delectronsofTiatomswhiletheoxygenatomcontributesaverysmallamountofspininTinOclusters.
简介:Wereportfemtosecondpulsegenerationinanamplifiersimilaritonoscillatorandaprechirpedfiberamplifiersystem.Thefinaloutputpoweris1.4W,andthefundamentalrepetitionrateis19.1MHzafterasinglestatefiberamplifier.Thepulsewidthis109fs.
简介:A New E3 Transition from 9+ Isomer in 144Pm NucleusANewE3Transitionfrom9+Isomerin144PmNucleus¥ZhangYuhu;Y.Gono;ZhaoQinz...
简介:Caspasesfunctionasacomponentincellsignalingpathwayswhichareinvolvedineventssuchasapoptosis,cellgrowthanddifferentiation.Caspase-9(CASP9)isamemberoftheintrinsicapoptosispathway,whichisactivatedasaresultofmitochondrialdamageandcytochromecrelease.Onceactivated,CASP9cleavesandactivatestherelevantcaspases,suchascaspase-3,thattargetavarietyofcellularcomponentstodismantleacellandpresentthefragmentsforphagocytosis[1].