简介:1-17 Vibrational Properties of Na_n1-17VibrationalPropertiesofNa_n¥ZhangFengsllou;E.SuraudlandR.GlowinskiZItisknownthatsmallso...
简介:Thisexperimentusedwhole-cellpatch-clamptechniquetoinvestigatethecourseofrecoveryfromuse-dependentblockofNa+channels(Nav1.5)inhumanembryonickidney(HEK)cells,onwhichtoverifytheeffectsofvolatileoilofNardostachychinesisBatal(Gansong).MethodsTwopulsesgeneratedbycomputerfollowedbyarecoverypulseandatestpulse,theintervaldurationbetweenthetwopulsesvariedfrom16msto1s,andholdingpotentialis-80mVto-140mV.ThepeakNa+currentforagivenrecoverytimewasnormalizedtothefullyrecoveredpeakcurrent,andthenormalizedvaluewastheplotasafunctionoftherecoverytimetostudytheeffectsof3ppmconcentrationGansongvolatileoilonrecoveryfromuse-dependentblockofNav1.5inHEK.ResultsItshowedthatGansonggroup,comparingwithcontrolgroup,delayedthetimecoursesofrecoveryfromuse-dependentblock[(33.2±5.77)msforcontrolgroupand(52.5±6.08)msfor3ppmGansonggroup,P<0.05].InthepresenceofGansong,inhibitionoftheNa+currentwasenhancedbyincreasingfrequencyofdepolarizingpulsefrom56.5msto16ms.Inthecontrolgroup,thetimecourseofrecoveryshowedthatrecoverystartedat19.5msandfinishedby36.5ms.InthepresenceofGansong,thetimecourseofrecoveryshowedthatrecoverystartedat36.5msandfinishedby56.5ms.Na+currentsrecoveredfromtheuse-dependentblockvaryingwithholdingpotential(holdingpotential-dependent).ConclusionsTheresultssuggestedthatNa+currentsrecoveredfromtheuse-dependentblockcorrelatedwithpersistenttime,holdingpotential.TheGansongvolatileoilhasinhibitiveeffectontheNa+currentrecovery.
简介:摘要阿伏加德罗常数是化学高考的热点之一,该类试题以中学所学重点物质为平台,考查以NA为载体的相关计算,基本概念、原理、题目涉及的知识面广,灵活性强,因而能很好地考查学生思维的严密性。
简介:Na离子电池由于他们的低费用和自然许多Na资源为大规模精力存储系统被认为一种有希望的选择到Li离子电池。大努力全球正在做为Na离子电池开发高效的电极材料,它为Na离子电池是批评的。这评论基于Na存储机制为Na离子电池提供阳极材料的全面概述:基于插入的材料,基于合金的材料,基于变换的材料和器官的composites。并且我们总结那些阳极材料的Na存储机制并且讨论他们的失败机制。而且,与那些阳极联系的问题和挑战被指出,并且可行策略为设计高效的阳极材料被建议。根据研究的当前的状态,尽管实质的进步被获得了,为为Na离子电池的合适的阳极材料的搜索仍然是挑战性的。不过,我们相信高效的Na离子电池在不久的将来将为在大规模精力存储系统的实际应用程序是有希望的。
简介:Withpositronannihilationradiationonedimensionangular-correlationdevice,itismeasuredthatpositronannihilationradiationonedimensionangular-correlationcurvesofpolycrystalsodiumionconductorNa5Y1-xCrxSi4O12(NYCS)system.Afterelectronmomentumdistributioncurvesarenormalized,linearparametersarecalculated.TheparametersH,WandSshowthechangeofNa+ionvacancyconcentrationinNYCSseriessamples.TheresultsshowthatparametersH,WandSofonedimensionangular-correlationcurvesofthosesamplesvarygreatlywithCr2O3contents.WithCr2O3contentincreasing,HandSparametersincrease,butWdecreases,andreachesextremesatx=0.05;thenwithCr203addingcontinually,parametersHandSdecreasegradually,parameterWincreasesgradually.Thisshowsthat,inaddtiontoCr2O3,theconductivityhascloserelation
简介:Fourvegetationtypes,namelyconiferousandbroadleavedmixedforest,secondarydeciduousbroadleavedforest,openshrubsandmeadow,withdwarfbamboo(Indocalamuswilsoni)arecomparedontheirfloristiccomposition,lifeform,communitystructure,andsurvivorshipofbamboos.Disturbanceofconifer-loggingtwodecadesagopromotedthespeciesdi-versity,butnegativelyinfluencedthesurvivorshipofdwarfbamboowhichisdominateontheforestfloor.Openshrubsbearmorespeciesdiversityandmoregeophytesinitslife-formspectrumthanitsbackgroundvegetationsubalpinemeadow,how-ever,dwarfbambooisgrowingmuchbetterintheopenshrubsthaninthemeadow.Itseemsdwarfbambooprobablyfavor-itestooccurinthevegetationatgentleslopeswithamediatecanopycover.Itsmassfloweringinthesecondarydeciduousforestsuggeststhatasimultaneousfloweringandfollowingdiebackmaybeirruptintherecentlycomingyearsoverthesubal-pineShennongjiainChina,whichwillbenotonlyalterthefloristiccompositionandcommunitystructureoftheoldbamboostands,butalsoinfluencethesurvivorshipofthisrarespecies.