简介：LetP(z)beapolynomialofdegreenhavingnozerosin|z|<1,thenforeveryrealorcomplexnumberβwith|β|≤1,and|z|=1,R≥1,itisprovedbyDewanetal.[4]that︱P(Rz)+β(R+1/2)nP(z)︱≤1/2{(︱Rn+β(R+1/2)n︱+︱1+β(R+1/2)n︱)max|z|=1|P(z)︱-(︱Rn+β(R+1/2)n︱-︱1+β(R+1/2)n︱)min|z|=1|P(z)︱}.Inthispaperwegeneralizetheaboveinequalityforpolynomialshavingnozerosin|z|

简介：UsingNevanlinnatheoryofthevaluedistributionofmeromorphicfunctionsandWiman-Valirontheoryofentirefunctions,weinvestigatetheproblemofgrowthorderofsolutionsofatypeofsystemsofdifferenceequations,andextendsomeresultsofthegrowthorderofsolutionsofsystemsofdifferentialequationstosystemsofdifferenceequations.

简介：

简介：

简介：Severalbacterialstrainswereisolatedfromdifferentrhizospheres.Amongthese,strainPDY7exhibitedstrongantibacterialactivityagainstthericebacterialblight(BB)pathogenXanthomonasoryzaepv.oryzae(Xoo)bythelaboratorydualplateassays.TheantibacterialpropertyofthestrainPDY7wasfurtherinvestigatedfortheproductionof2,4-diacetylphloroglucinol(DAPG),whichamplifiedacharacteristicof629-bpDNAfragmentbyPCR-basedscreeningmethodusingphlDprimers.TheapplicationofphlDpositivestrainswascarefullyevaluatedfordiseasecontrolandgrowthpromotionofriceplantsunderfieldconditions.TheselectedstrainPDY7suppressedthericeBBby58.83%and51.88%underglasshouseandfieldconditions,respectively.Inaddition,thestrainPDY7showedsignificanttwo-foldincreaseinrootlength(18.08cm),shootlength(29.81cm),andgrainyield(96.07g).StrainPDY7promotedthegrowthofriceplantsbyproductionofindole-3-aceticacid(IAA),whichwasdeterminedbyhighperformanceliquidchromatography(HPLC)analysis.OurfindingssuggestthatPDY7belongstotheP.fluorescensgroupandcanserveaspotentialbiocontrolofBBaswellasbiofertilizeragentforgrowthpromotionofrice.

简介：Thisstudydemonstratesanovelapproachforrapidsynthesisofsilver（Ag）nanowiresinducedbyvanadiumtrioxide（V2O3）particlesinaqueoussolutionatroomtemperature.Silvernanowireshaveanaveragediameterof20nmandlengthuptoafewmicrometersbyparametricoptimization.ThemicrostructureofthesilvernanowireswascharacterizedbyTEM,HRTEM,SEM,andXRDtechniques.Theopticalpropertyoftheas-preparedproductwasmeasuredbyultraviolet-visible（UV-vis）spectroscopy.ThepossiblegrowthmechanismofAgnanowiresviaorientedattachmentofAgnanocrystalswasdiscussed.Thepresentapproachshowsseveraluniquefeaturessuchasrapid（afewminutes）,reproducibleandhigh-yieldreactionwithnoneedofanymodifiers.V2O3rodswerereportedforthefirsttimetobeusedforsynthesisofsilvernanowires,playingmultiplerolesasreducingagent,template,andcatalyst.Thesilvernanowiresproducedarepromisingforopticalapplications（e.g.,SERS）duetotheirroughsurface.

简介：

简介：

简介：Objective:Totesttheeffectsofsalidrosideonformationandgrowthofgliomatogetherwithtumormicroenvironment.Methods:SalidrosideextractedfromRhodiolaroseawaspurifiedandtreatedonhumangliomacellsU251attheconcentrationof20μg/mL.3-(4,5-dimethylthiazol-2-yl)-2,5-dephenyltetrazoliumbromide(MTT)assayforcytotoxicityandflowcytometry(FCM)forcellcycleanalysiswereperformed.Thenforinvivostudy,xenotransplantationtumormodelinnudemicewasgeneratedandtreatedwithsalidrosideattheconcentrationof50mg/kg.dfortotally20d.Bodyweightandtumorsizeweredetectedevery2dafterthetreatment.Thelevelsof8-isoprostane,superoxidedismutase(SOD)andmalondialdehyde(MDA),specialmarkersforoxidativestress,weredetectedwhileimmunofluoresencestainingwasperformedforastrocytedetection.Results:Forinvitrostudy,salidrosidecoulddecreasetheviabilityofhumangliomacellsU251andthegrowthofU251cellsatG0/G1checkpointduringthecellcycle.Forinvivostudy,salidrosidecouldalsoinhibitthegrowthofhumangliomatissueinnudemice.Thebodyweightofthesenudemicetreatedwithsalidrosidedidnotdecreaseasquicklyascontrolgroup.Inthetumorxenotransplantationnudemicemodel,micewerefoundofinhibitionofoxidativestressbydetectionofbiomarkers.Furthermore,overgrowthofastrocytesduetothestimulationofoxidativestressinthecortexofbrainwasinhibitedafterthetreatmentofsalidroside.Conclusions:Salidrosidecouldinhibittheformationandgrowthofgliomabothinvivoandinvitroandimprovethetumormicroenvironmentviainhibitionofoxidativestressandastrocytes.

简介：Objective:Flupirtineisanon-opioidanalgesicwithoutantipyreticorantiphlogisticpropertiesbutwithfavorabletolerabilityinhumans.Thisanalgesicalsoexhibitsneuroprotectiveactivities.Furthermore,flupirtineantagonizesglutamateandNMDA-inducedintracellularlevelsofCa2+andcounteractstheeffectsoffocalcerebralischemia.Althoughflupirtinehasbeenusedtorelievepaincausedbydifferentdiseasesandclinicalprocedures,informationonthesafetyandefficacyofflupirtineislimited.ThepresentstudywasconductedtoinvestigatetheneuroprotectiveeffectsofflupirtineonU373malignantglioma(MG)celllines.Methods:CellviabilityandcellcycleanalysiswasperformedbyMTTassayandflowcytometry,respectively.Results:VariationsinthegrowthofU373MGcellsin5mMN-methyl-D-aspartate(NMDA),1mMflupirtine,andcombinedtreatmentindicatedtheantagonisticeffectsofNMDAandflupirtineonMGcelllines.Thevariationinthepercentageofgatedcellpopulationindifferentcellcyclephasesshowedsignificantvariationsafter48hoftreatment.Conclusion:FlupirtinehasneuroprotectiveeffectofonU373MGcells,whichlimitsitsuseinthepainmanagementofbraintumors.Thispropertywarrantsfurtherstudiesusinganimalmodelsandlarge-scaleclinicaltrials.

简介：Intergranularslowcrackgrowthinzirconiapolycrystalisdescribedwithacohesivezonemodelthatsimulatemechanicallythereaction-rupturemechanismunderlyingstressandenvironmentallyassistedfailure.A2Dpolycrystalisconsideredwithcohesivesurfacesinsertedalongthegrainboundaries.Theanisotropicelasticmodulusandgrain-to-grainmisorientationareaccountedfortogetherwithaninitialstressstaterelatedtotheprocessing.Aminimumloadthresholdisshowntooriginatefromtheonsetofthereaction-rupturemechanismtoproceedwhereaminimumtractionisreachedlocallyandfromthemagnitudeoftheinitialcompressionstresses.Thisworkaimsatprovidingreliablepredictionsinlonglastingapplicationsofceramics.

简介：Thisstudyaimedtoexploretheroleofmechanicaltensioninhypertrophicscarsandthechangeinnervedensityusinghematoxylin-eosinstainingandS100immunohistochemistry,andtoobservetheexpressionofnervegrowthfactorbywesternblotanalysis.Theresultsdemonstratedthatmechanicaltensioncontributedtotheformationofahyperplasticscarinthebackskinofrats,inconjunctionwithincreasesinbothnervedensityandnervegrowthfactorexpressioninthescartissue.Theseexperimentalfindingsindicatethatthecutaneousnervoussystemplaysaroleinhypertrophicscarformationcausedbymechanicaltension.

简介：Inthispaper,theglobalasymptoticstabilizationbyoutputfeedbackisinvestigatedforaclassofuncertainnonlinearsystemswithunmeasuredstatesdependentgrowth.Comparedwiththecloselyrelatedworks,theremarkablenessofthepaperisthateitherthegrowthrateisanunknownconstantorthedimensionoftheclosed-loopsystemissignificantlyreduced,mainlyduetotheintroductionofadistinctdynamichigh-gainobserverbasedonanewupdatinglaw.Motivatedbytherelatedstabilizationresults,andbyskillfullyusingthemethodsofuniversalcontrolandbackstepping,weobtainthedesignschemetoanadaptiveoutput-feedbackstabilizingcontrollertoguaranteetheglobalasymptoticstabilityoftheresultingclosed-loopsystem.Additionally,anumericalexampleisconsideredtodemonstratetheeffectivenessoftheproposedmethod.

简介：AIM:Toestablishtheratmodelofstreptozotocin(STZ)induceddiabeticretinopathy(DR),whichisthemostcommoncauseofvisuallossandblindnessinpatientswithdiabetes,andobservethegeneexpressionofvascularendothelialgrowthfactor(VEGF)anditsreceptorsduringthedevelopmentofDR.METHODS:AratmodelofdiabeteswasestablishedbyintraperitonealinjectionofSTZ.Thediabeticratswerehousedfor2,3and4monthsafterthedevelopmentofdiabetes.Retinalhistopathologicalobservationwasperformed.TheretinalvesselswereobservedbyimmunofluorescencestainingbyCD31.ThemRNAexpressionofVEGF,VEGFreceptor1and2(VEGFR1/2)inratretinawasdetectedbyreversetranscriptionpolymerasechainreaction(RT-PCR)analysis.RESULTS:Retinalhistopathologicalobservationshowedthemorphologicalchangesofinnernuclearlayer(INL)andouternuclearlayer(ONL)atanytime-point,andalsodemonstratedtheincreasednewvesselsatboth3,4monthsafterthedevelopmentofdiabetes.TheCD31stainingresultsshowedthatthenumberofvesselswasincreasedintheretinasofdiabeticratsatboth3and4monthsafterthedevelopmentofdiabetes.Ascomparedtothenormalrats,themRNAexpressionofVEGFwasincreasedinretinasofdiabeticratsat3monthsafterthedevelopmentofdiabetes,whileVEGFR1andVEGFR2mRNAexpressionwasincreasedat2,3and4monthsafterthedevelopmentofdiabetes.CONCLUSION:Takentogether,ourresultsdemonstratedthatDRwasoccurredat3monthsafterthedevelopmentofdiabetes,andthemRNAexpressionofVEGF,VEGFR1andVEGFR2wereincreasedintheprocessofDR.ThepresentstudyfurtherevidencedtheinvolvementofVEGFanditsreceptorsintheprocessofDR.

简介：

简介：Thegrowthandcollapsebehaviorsofasinglecavitationbubblenearaheatedwallanditseffectontheheattransferarenumericallyinvestigated.Thepresentstudyisdesignedtorevealthemechanismofcavitationenhancedheattransferfromamicroscopicperspective.Inthesimulation,thetime-dependentNavier-Stokesequationsaresolvedinanaxisymmetrictwo-dimensionaldomain.Thevolumeoffluid(VOF)methodisemployedtotracktheliquid-gasinterface.Itisassumedthatthegasinsidethebubbleiscompressiblevapor,andthesurroundingliquidisincompressiblewater.Masstransferbetweentwophasesisignored.Thecalculatedbubbleprofileswerecomparedtotheavailableexperimentaldata,andagoodagreementwasobtained.Then,therelationshipamongbubblemotion,flowfieldandsurfaceheattransfercoefficientwasanalyzed.Onthisbasis,theeffectsofsuchfactorsastheinitialdistancebetweenthebubbleandthewall,theinitialvaporpressureandtheinitialbubblenucleussizeontheheattransferenhancementarediscussed.Thepresentstudyishelpfultounderstandtheheattransferphenomenoninpresenceofcavitationbubbleinliquid.

简介：

简介：Quanji()山岳位于西北中国，它是被解释一微大陆那由变形地下室和稳定的盖子阶层组成。在中国有在Quanji山岳和主要cratons之间的基因关系的一些争吵。在这研究，我们在situ锆石U-Pb和Hf获得了Yingfeng的同位素的作文()从由LA-MC-ICP-MS的申请的西北Quanji山岳的rapakivi花岗石技术。二十个U-Pb年龄大小点一致或近一致，并且他们的加权的吝啬的207Pb/206Pb年龄是1个793.9ene大陆人更低的外壳。我们测量磁性的参数(危险性和磁性的磁滞现象参数例如浸透磁化Js，浸透等温的残余的磁化Jrs，和内在的coercivityHc)十一，Hannuoba从太古代的Huaian地面降低外壳的捕虏体和九地面granulites。结果显示一般水准珍视，太古代的granulites的Js和Jrs是4122洠条敮楴?業敮慲潬祧愠摮瀠瑥潲潬祧；衜?衜?

简介：Themetalorganicvaporphaseepitaxy(MOVPE)growthofindiumgalliumnitride(InGaN)hasbeendiscussedindetailtowardsthefabricationofsolarcell.TheInGaNfilmwithIncontentsupto0.4aresuccessfullygrownbycontrollingthefundamentalgrowthparameterssuchastheprecursorgasflowrates,temperatureetc.TheformationofmetallicInoriginatesfromthehighervalue(0.74)oftrimethylindium/(trimethylindium+triethylgallium)(TMI/(TMI+TEG))molarratiowithlow(4100)V/Ⅲweightmolarratiowhilethelowervalue(0.2)ofTMI/(TMI+TEG)causesthephaseseparation.Itisalsonecessarytocontrolthegrowthrateandepitaxialfilmthicknesstosuppressthephaseseparationinthematerial.ThecrystallinequalityofgrownfilmsisstudiedanditisfoundtobemarkedlydeterioratedwithincreasingIncontent.ThelatticeparametersaswellasthethermalexpansioncoefficientmismatchbetweenGaNtemplateandInGaNepi-layerareprimarilyconsideredasthereasonstodeterioratethefilmqualityforhigherIncontent.ByusingIn0.16Ga0.84Nfilms,ann+-phomo-junctionstructureisfabricatedon0.65mmGaNtemplate.Forsuchadevice,theresponsetothelightillumination(AM1.5)isobservedwithanop-ncircuitvoltageof1.4Vandtheshortcircuitcurrentdensityof0.25mA/cm2.Toimprovetheperformanceaswellasincreasesolarphotoncapturing,thedeviceisfurtherfabricatedonthickGaNtemplatewithhigherIncontent.TheIn0.25Ga0.75Nn+-pjunctionsolarcellisfoundbetterperformancewithanop-ncircuitvoltageof1.5Vandtheshortcircuitcurrentdensityof0.5mA/cm2.ThisistheInGaNp-nhomo-junctionsolarcellwiththehighestIncontenteverreportedbyMOVPE.

简介：Tocomparetheeffectsofslow-releasenitrogenfertilizeratsixdifferentlevelsontheflagleafchlorophyllfluorescencecharacteristicsofsuperhybridrice,afieldfertilizationexperimentwasconductedwithsuperhybridriceYLiangyou1asatestmaterial.Thephotosyntheticelectrontransportrate(ETR),effectivequantumyield(EQY),photochemicalquenchingcoefficient(qP),andnon-photochemicalquenchingcoefficient(NPQ)offlagleavesweremeasuredattheinitialheading,fullheading,10dafterfullheadingand20dafterfullheadingstages.ResultsshowedthatthevaluesofETR,EQYandqPincreasedwithricedevelopmentfrominitialheadingto20dafterfullheading,whereastheNPQdecreased.Duringthemeasuredstages,ETR,EQYandqPincreasedinitiallyandthendecreasedasnitrogenapplicationamountincreased,buttheypeakedatdifferentnitrogenfertilizerlevels.ThemaximumETRandEQYvaluesappearedatthetreatmentof135kg/hm2N.Inconclusion,theoptimumnitrogenamountforchlorophyllfluorescencecharacteristicsofsuperhybridricewas135180kg/hm2.