简介:Thesteady-stateelectricalconductivity,aswellasthedielectricpropertiesbetween2×10-4Hzand100kHz,andat1GHz,arereportedforureasecompressedpowdersamplesoflowhydration.Theresultsshowthatthelarge,lowfrequencydielectricdispersion,knownasα-dispersion,isduetothebuild-upofaspacechargeofprotonsatthesample-electrodeinterfaces.Asmallerdispersion,appearingathigherfrequencies,isconcludedtobeassociatedwithhinderedmotionsofthepeptideresiduesinthemolecularstructureofurease.Theextentofthesepolypeptidebackbonemotionsisshowntobestronglydependedontheextentofenzymehydration.Thisworkiscontributedtothede-velopmentofconductimetricbiosensors.
简介:ThepurposeofthispaperistoverifytheSmulyanlemmaforthesupportfunction,andalsotheGateauxdifferentiabilityofthesupportfunctionisstudiedonitsdomain.Moreover,weprovideacharacterizationofFrechetdifferentiabilityofthesupportfunctionontheextremalpoints.
简介:Researchonjumpregressionfunc(?)onshasnotbeenadequateyetAccordingtotheinformationaboutthenumberofjumps,theirpositionsandjumpmagnitudes,jumpregressionfunctionscanbeclassifiedintoeighttypes.Thispaperdealsespeciallywiththesecondjumpregressionfunction.Firstofall,aconceptoftrimmedsplineestimateisproposedandwithitanL~2-consistentestimateofthesmoothingpartofthejumpregressionfunctionisobtained.ThisalongwiththeL~2-consistentestimateofjumpmagnitudeconstitutesanestimateofthesecondjumpregressionfunction.Thispaperdiscussesalsothecasethatthejumppositionshavesomeindeterminacy.Anewcriterionissuggestedanditsuniquesolutionderived.Intheend,afewnumericalresultsaregiven.
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简介:Thewater-conductingnetworkofcapillariesinvascularplantshasevolvedoverhundredsofmillionsofyearsinordertobeabletocopewithbubbleclogging,aproblemwhichalsoaffectsmodernmicrofluidicdevices.Decadesofanatomicalstudieshaverevealedthatplantsgrowinginhabitatsinwhichtheformationofbubbles,oremboli,islikelytobeafrequentoccurrenceoftenhavevariousformsofgeometricalsculpturingontheinternalsurfacesofthexylemconduits.Thepossiblefunctionofsuchwallsculpturinghaslongbeenthesubjectofspeculation.Wehaveinvestigatedthehypothesisthatwallsculpturingisafunctionaladaptationdesignedtoincreasethewettabilityofthewallsofxylemconduits,aneffectwhichcouldbedescribedastheinverseofthewell-knownlotus-effect.Ourresultsshowthatwallsculpturingdoesenhancewettability.Importantly,theoreticalcalculationsrevealthatthegeometricparametersofvarioustypesofwallsculpturingaresuchthattheresultingsurfacesaresufficientlyroughtoenhancewettability,butnotsignificantlyrougher.Theresultsprovideanappealinganswertothelong-standingdebateonthefunctionofwallsculpturinginxylemconduits,andmayprovidebiomimeticcluesfornewapproachestotheremovalofbubblesinmicrofluidicchannels.
简介:WeestablishtheconstructiontheoryoffunctionbaseduponalocalfieldKpasunderlyingspace.Byvirtureoftheconceptofpseudo-differentialoperator,weintroduce"fractalcalculus"(or,p-typecalculus,or,Gibbs-Butzercalculus).Then,showtheJacksondirectapproximationtheorems,BermsteininverseapproximationtheoremsandtheequivalentapproximationtheoremsforcompactgroupD(Kp)andlocallycompactgroupK+p(=Kp),sothatthefoundationofconstructiontheoryoffunctiononlocalfieldsisestablished.Moreover,theJacksontype,Bernsteintype,andequivalentapproximationtheoremsontheH?lder-typespaceCσ(Kp),σ>0,areproved;thentheequivalentapproximationtheoremonSobolev-typespaceWrσ(Kp),σ≥0,1≤r<+∞,isshown.
简介:传统地,睾丸激素和雌激素被认为分别地是男、女的性荷尔蒙。然而,estradiol,雌激素的占优势的表格,也在男性功能起一个关键作用。在人的Estradiol为modulating性欲,可勃起的功能,和精子发生是必要的。雌激素受体,以及aromatase,把睾丸激素变换成雌激素的酶,充满大脑,阴茎,和睾丸,为性功能重要的机关。在大脑,estradiol合成在与性唤起有关的区域被增加。在阴茎,另外,雌激素受体在神经与血管的捆附近与高集中在整个阴茎海绵体被发现。低睾丸激素和提高的雌激素独立于对方增加可勃起的机能障碍的发生。在睾丸,精子发生被雌激素在每水平调制,以hypothalamus-pituitary-gonadal轴开始,由Leydig,Sertoli,和细菌房间列在后面,并且与ductal上皮,epididymis,和成熟精子完成。由estradiol的阴囊的房间的规定显示出两个一禁止并且stimulatory影响,显示剂量依赖者并且时间地的一曲复杂交响乐敏感调整。我们在这评论的目标是阐明到由看荷尔蒙的男性功能的estradiol的全面贡献在可勃起的功能,精子发生,和性欲上完成。
简介:ObjectiveThemainpurposeofthepresentstudywastodescribethevestibularfunctioninpatientswithauditoryneuropathy(AN),andtoassesstheirabilitytomaintainbalance.MethodsVestibularfunctiontestswereperformedon32patientswithANand36normalsubjectsincludingelectronystagmopraphy(ENG)andstaticpostrography(SPG).Theresultsfromthetwogroupswerecompared.ResultsEquilibriumfunctioninpatientswithAN,wasabnormal,comparedtonormalsubjects.ConclusionVestibularfunctiontests,espe-ciallystaticpostrography,shouldbeperformedonpatientswithAN.
简介:Regulatingserotoninexpressioncanbeusedtotreatpsychoticdepression.Mifepristone,aglucocorticoidreceptorantagonist,isaneffectivecandidateforpsychoticdepressiontreatment.However,theunderlyingmechanismrelatedtoserotonintransporterexpressionispoorlyunderstood.Inthisstudy,weclonedthehumanbrainserotonintransporterintoXenopusoocytes,toestablishaninvitroexpressionsystem.Two-electrodevoltageclamprecordingswereusedtodetectserotonintransporteractivity.Ourresultsshowthatmifepristoneattenuatesserotonintransporteractivitybydirectlyinhibitingtheserotonintransporter,andsuggeststhattheserotonintransporterisapharmacologicaltargetofmifepristoneforthetreatmentofpsychoticdepression.
简介:Wienerfilteringisusedtoestimatereceiverfunctioninatime-domain.Withtheverticalcomponentof3-componentteleseismicPwaveformastheinputofaWienerfilter,receiverfunctionasthefilterresponse,andradialandtangentialcomponentsastheexpectedoutput,receiverfunctionisestimatedbyminimizingtheerrorbetweenexpectedandactualoutputs.ReceiverfunctioncanbeobtainedbysolvingtheToeplitzequationusingtheLevinsonalgorithm.Thenon-singularityoftheToeplitzequationensuresthestabilityofWienerDeconvolution.BothsyntheticandobservationalseismogramcheeksshowthatWienerDeconvolutionisaneffectivetime-domainmethodtoestimatereceiverfunctionfromteleseismicPwaveform.
简介:Multi-functionaldendrometerisakindofforestrytoolthatcanmeasuremultiplefactorsofforest.Bycombiningsensortechnologyandcomputertechnology,adigitalmulti-functiondendrometerhasbeendeveloped,whichintegratedthefunctionsofmeasuringheight,distance,azimuth,slope,elevation,formquotientofanypartsofthestemintoonebodyatthesametest.Thedendrometercanfitthecomplexforestenvironment,solvethedifficultproblemsinaspectsofplantheight,measuredistance,centraldiameterandformquotientofbreastheight.Theaccuracycanmeettherequirementsofgeneralforestsurvey.