简介:目的检测乙型病毒性肝炎病人外周血T细胞亚群和膜白介素-2受体(mIL-2R)表达水平并探讨其在乙肝发病机制中的作用.方法采用生物素-链霉亲和素法对188例乙肝病人外周血单个核细胞(PBMC)进行T细胞亚群及植物血凝素(PHA)诱导前后mIL-2R水平测定.结果乙肝病人T淋巴细胞亚群中CD3+、CD4+降低,CD8+升高,CD4+/CD8+比值降低,外周血单个核细胞mIL-2R表达水平在PHA诱导前后均降低,与正常对照相比,差异有显著意义(P<0.01);另外,乙肝病人PBMC中HBV-DNA(+)病人与PBMC内HBV-DNA(-)病人相比,mIL-2R表达水平亦存在较大差异(P<0.01).结论乙肝病人体内存在明显的细胞免疫功能紊乱,T细胞活化障碍,并与肝病的慢性化相关.
简介:SodiumdithioniteinitiatedsulfinatodehalogenationofBrCF2CF2Risstudied.
简介:【摘要】 近年来,金属有机骨架(MOFs)因其具有多孔结构、电学光学特性、优异的催化性能、生物相容性以及可调节的孔径,受到人们的广泛关注。MIL-101-NH2作为拉瓦锡材料中的一员,在强酸或强碱性溶液中表现出优异的稳定性,与此同时,MIL-101-NH2具有丰富的孔隙,这有利于金属离子扩散进入孔道,也有助于通过修饰法引入一些有机小分子配体。基于此本文选择MIL-101-NH2(Fe)为基础材料,通过功能化改性制备RGO@ Fe3O4@MIL-101-NH2复合材料。有望在光催化领域和储氢方面做出巨大贡献。
简介:AconstructiveproofisgivenfortheinversionformulaforzonalfunctionsonSL(2,R).AconcretelyconstructedsequenceofzonalfunctionsareprovedtosatisfytheinversionformulaobtaAnedbyHarish-Chandraforcompactsupportedinfinitelydifferentiablezonalfunctfons.Makinguseofthepropertyofthissequencesomehowsimilartothatofapproximationkernels,theauthorndeducethattheinversionformulaistrueforcontinuouszonalfunctiotmon8L(2,R)somecondition.Theclassicalresultcanbeviewedasacorollaryoftheresultshere.
简介:Adoubleactivecentersystem,namelySalen-Cu(Ⅱ)@MIL-101(Cr),wassuccessfullysynthesizedviathe“shipinabottle”approach,whichactedasabifunctionalmaterialforbothcaptureandconversionofCO2inasingleprocess.Forthefirsttime,Salen-Cu(Ⅱ)@MIL-101(Cr)catalystwasdevelopedforthesynthesisofpropylenecarbonatefromCO2andpropyleneoxideunderroomtemperatureandambientpressurewithayieldof87.8%over60h.Furthermore,thereactionmechanismwasalsodiscussed.
简介:.Thesingle2dilationorthogonalwaveletmultipliersinonedimensionalcaseandsingleA-dilation(whereAisanyexpansivematrixwithintegerentriesand|detA|=2)waveletmultipliersinhighdimensionalcasewerecompletelycharacterizedbytheWutamConsortium(1998)andZ.Y.Li,etal.(2010).Butthereexistnomoreresultsonorthogonalmultivariatewaveletmatrixmultiplierscorrespondingintegerexpansivedilationmatrixwiththeabsolutevalueofdeterminantnot2inL2(R2).Inthispaper,wechoose2I2=(2002)asthedilationmatrixandconsiderthe2I2-dilationorthogonalmultivariatewaveletY={y1,y2,y3},(whichiscalledadyadicbivariatewavelet)multipliers.Wecallthe3×3matrix-valuedfunctionA(s)=[fi,j(s)]3×3,wherefi,jaremeasurablefunctions,adyadicbivariatematrixFourierwaveletmultiplieriftheinverseFouriertransformofA(s)(cy1(s),cy2(s),cy3(s))?=(bg1(s),bg2(s),bg3(s))?isadyadicbivariatewaveletwhenever(y1,y2,y3)isanydyadicbivariatewavelet.Wegivesomeconditionsfordyadicmatrixbivariatewaveletmultipliers.TheresultsextendedthatofZ.Y.LiandX.L.Shi(2011).Asanapplication,weconstructsomeusefuldyadicbivariatewaveletsbyusingdyadicFouriermatrixwaveletmultipliersandusethemtoimagedenoising.
简介:Inthispaper,theauthorsobtaintheBaecklundtransformationontime-likesurfaceswithconstantmeancurvatureinR^2,1.Usingthistransformation,familiesofsurfaceswithconstantmeancurvaturefromknownonescanbeconstructed.