简介：

简介：

简介：TheECRwaveheatingisnowaroutinemethodforplasmaheatingandprofilecontrolinfusiondevicesandalsoinplasmaapplications.TheoreticalstudyofECRwavepropagationandabsorptionbeganveryearlyin1950's.Basictheoreticalworkhadaccomplishedin1970～1980.Fortoroidaldeviceslikethetokamak,thefundamentalO-modeandX-modewithnearlyperpendicularpropagationwereusedveryoften.ForpureO-modeandX-modewithkx=O,

简介：Aim:TostudytheeffectofEcdysterone(ECR)ontheexpressionofTaufromthecerebralcorticeandhippocampusandbehaviorsinpassiveavoidancereactionandspatialdiscriminationofthemiceinducedbyoverloadaluminumsalt.MethodsFourty-fiveNIHmicewererandomlydividedintofivegroups,thecontrolgroup,themodelgroup,thetreated

简介：Inordertostudytheatomicoxygencorrosionofspacecraftmaterialsinlowearthorbitenvironment,anatomicoxygensimulatorwasestablished.Inthesimulator,a2.45GHzmicrowavesourcewithmaximumpowerof600WwaslaunchedintothecircularcavitytogenerateECR(electroncyclotronresonance)plasma.TheoxygenionbeammovedontoanegativelybiasedMoplateundertheconditionofsymmetrymagneticmirrorfieldconfine,thenwasneutralizedandreflectedtoformoxygenatombeam.Thepropertiesofplasmadensity,electrontemperature,plasmaspacepotentialandionincidentenergywerecharacterized.TheatomicoxygenbeamfluxwascalibratedbymeasuringthemasslossrateofKaptonduringtheatomic5～30eVandacrosssectionofφ80mmcouldbeobtainedundertheoperatingpressureof10-1～10-3Pa.Suchahighfluxsourcecanprovideacceleratedsimulationtestsofmaterialsandcoatingsforspaceapplications.

简介：Objective:ToexplorethemechanismofEcdysterone(ECR)inpreventionoflearningandmemorydysfunctionoftheratsinducedbyβ-amyloidpeptide(Aβ25-35).Methods:NinetyWistarmaleratswererandomlydividedintofivegroups,thecontrolgroup,themodelgroup,thetreatedgroups(ECR4mg·kg^-1andECR8mg·kg-1andNimodipine