简介：Studiesontherelationshipbetweencorporaterealestate(CRE)andeconomiccyclesareverythin,especiallyfromdevelopingcountries,suchasSouthAfrica.More,inpractice,mostfirmshardlydedicateenoughresourcestoCREdivisions.Thisleadstothatmanagementnotfullymaximisesthewealthofshareholders.Thisstudyusesmulti-linearregressiontotesthowGDP,interestrate,andtotalcorporatecostsreacttochangesinCRE.ThesampleismadeupofbluechipfirmslistedontheJohannesburgStockExchange(JSE).Theresultsrevealmixedbagsolutions-forcertainfirms;GDP,interestrate,andcorporatecostsarestatisticallysignificantandviceversa.More,thisanalysiscanbereplicatedtoothersimilarindustriesandindicesaroundtheworld.

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简介：退役篮球明星科比·布莱恩特赢得了五次NBA总冠军，但当他首次尝试获得奥斯卡奖时，他觉得这比洛杉矶湖人队获得胜利更让人激动。这位39岁的未来名人堂成员说。

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简介：Theoryandevidenceindicatethattreesandothervegetationinfluencetheatmosphericwater-cycleinvariousways.Theseinfluencesaremoreimportant,morecomplex,andmorepoorlycharacterisedthaniswidelyrealised.Whilethereislittledoubtthatchangesintreecoverwillimpactthewater-cycle,thewiderconsequencesremaindifficulttopredictastheunderlyingrelationshipsandprocessesremainpoorlycharacterised.Nonetheless,asforestsarevulnerabletohumanactivities,theselinkedaspectsofthewater-cyclearealsoatriskandthepotentialconsequencesoflargescaleforestlossaresevere.Here,fornon-specialistreaders,Ireviewourknowledgeofthelinksbetweenvegetation-coverandclimatewithafocusonforestsandrain(precipitation).Ihighlightadvances,uncertaintiesandresearchopportunities.Therearesignificantshortcomingsinourunderstandingoftheatmospherichydrologicalcycleandofitsrepresentationinclimatemodels.Abetterunderstandingoftheroleofvegetationandtree-coverwilreducesomeoftheseshortcomings.Ioutlineandilustratevariousresearchthemeswheretheseadvancesmaybefound.Thesethemesincludethebiologyofevaporation,aerosolsandatmosphericmotion,aswellastheprocessesthatdeterminemonsoonsanddiurnalprecipitationcycles.Anoveltheory-the‘bioticpump’-suggeststhatevaporationandcondensationcanexertamajorinfluenceoveratmosphericdynamics.Thistheoryexplainshowhighrainfallcanbemaintainedwithinthosecontinentalland-massesthataresufficientlyforested.Feedbackswithinmanyoftheseprocessescanresultinnon-linearbehavioursandthepotentialfordramaticchangesasaresultofforestloss(orgain):forexample,switchingfromawettoadrylocalclimate(orvisa-versa).Muchremainsunknownandmultipleresearchdisciplinesareneededtoaddressthis:forestscientistsandotherbiologistshaveamajorroletoplay.Newideas,methodsanddataofferopportunitiestoimproveunderstanding.Expectsurpr

简介：Theactivitiesofgeomagneticstormsaregenerallycontrolledbysolaractivities.Thecurrentsolarcycle(SC)24isfoundtobemild;comparedtoSCs19–23,thestormoccurrenceandsizederivedbyaveragingtheoccurrencenumberandDstaroundthesolarmaximumarereducedbyabout50–82%and36–61%,respectively.Weestimateseparately,forSC19to24,therepeatintervalsbetweengeomagneticstormsofspecificDst,basedonfitsofpower-lawandlog-normaldistributionstothestormdataforeachSC.RepeatintervalsbetweensupergeomagneticstormswithDst≤–250nTarefoundtobe0.36–2.95year(s)forSCs19–23,butabout20yearsbasedonthedataforSC24.Wealsoestimatetherepeatintervalsbetweencoronalmassejections(CMEs)ofspecificspeed(VCME)sinceCMEsareknowntobethemaindriversofintensestormsandtherelatedstatisticsmayprovideinformationaboutthepotentialoccurrenceofsupergeomagneticstormsfromthelocationoftheSun.OuranalysisfindsthataCMEwithVCME≥1860km/smayoccuronceper3and5monthsinSC23and24,respectively.BasedonaVCME-Dstrelationship,suchafastCMEmaycauseastormwithDst=–250nTifarrivingattheEarth.BycomparingtheobservedgeomagneticstormstostormsexpectedtobecausedbyCMEs,wederivetheprobabilityofCMEcausedstorms,whichisdependentonVCME.ForaCMEfasterthan1860km/s,theprobabilityofaCMEcausedstormwithDst≤–250nTisabout1/5forSC23or1/25forSC24.AlloftheaboveresultssuggestthatthelikelihoodoftheoccurrenceofsupergeomagneticstormsissignificantlyreducedinamildSC.

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简介：在最近的年里，广泛的短命原子集体大小被执行了在重--在用等时的集体Spectrometry(IMS)的Lanzhou的离子研究设备(HIRFL)。获得的集体价值成功地被用于原子结构和天体物理学研究。在这贡献，我们在HIRFL-CSR设备把简短介绍给原子集体大小。主要技术开发被描述，最近的结果被总结。而且，我们在Huizhou为下一代的存储戒指设备HIAF想象未来观点。

简介：Onthebasisofproposingtheexistenceofakarstcarboncycleandcarbonsinkatawatershedscale,thispaperprovidesfourpiecesofevidencefor;theintegrationofgeologyandecologyduringthecarboncycleprocessesmthekarstdynamicsystem,andestxmatedthekarstcarbonsinkeffectusingthemethodsofcomparativemonitoringofpairedwatershedsandthecarbonstableisotopetracertechnique.TheresultsofthesoilcarboncycleinMaocun,Guilin,showedthatthesoilcarboncycleinthekarstarea,theweatheringanddissolutionofcarbonaterocksunderthesoil,resultedinalowersoilrespirationof25%inthekarstoareathaninanon-karstarea(sandstoneandshale),andthecarbonisotoperesultsindicatedthat13.46%oftheheavycarbonofthehmestoneisinvolvedinthesoilcarboncycle.Thecomparativemonitoringresultsmpaxredwatersheds,suggestingthattheHCO3concentrationmakarstspringis10timesthatofarivuletinanon-karstarea,whiletheconcentrationofinorganiccarbonfluxis23.8times.Withbothchemicalstoichiometryandcarbonstableisotopes,theproportionofcarboninkarstspringsderivedfromcarbonaterockswasfoundtobe58.52%and37.65%respectively.Thecomparisononcarbonexchangeandisotopesatthewater-gasinterfacebetweenthegraniteandcarbonaterockbasinsintheLiRivershowedthattheCO2emissionofthekarstwateris10.92timesthatoftheallogenicwaterfromthenon-karstarea,whilethecarbonisotopeofHCO3^-inkarstwaterislighterby8.62%.However,thisdoesnotmeanthatthekarstwaterbodyhasalargercarbonsourceeffect.Onthecontrary,itmeansthekarstwaterbodyhasagreaterkarstcarbonsinkeffect.WhenthekarstsubterraneanstreaminZhaidi,Guilin,isexposedatthesurface,carbon-richkarstwaterstimulatedthegrowthofaquaticplants.Thevaluesofcarbonstableisotopesinthesamespeciesofsubmergedplantsgraduallybecomesheavierandheavier,andthe512mflowprocesshasamaximumrangeof15.46%.Thecalculationresultsshowe

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简介：TheHumisawidespreadphenomenon,reportedinmanypartsoftheworld.Itmanifestsitselfintheformofahum,rumbleandpulsing,oftenfeltasasensationmorethananaudiblesound.Startingin2011,residentsofWindsor,Ontario,Canadastartedreportingintermittentlowfrequencysound,widelyreferredtoastheHum(anddubbedtheWindsorHum).Thisreportoutlinesthedeploymentofashorttermgeophysicalfieldsurvey,performedduring2013inWindsor,Ontario,Canada,aimedatmonitoringtheairwavesignalsassociatedwiththeWindsorHum.Thesummaryofthelowfrequencysoundarraydeploymentispresentedanddiscussed.

简介：这份报纸论述一个全面区域扩大预言索引方法为地震的短逼近的预言使用GNSS。从云南省基于连续GNSS观察数据，排水量域用处理软件和地球物理的域效果的精确数据在数据周期滑倒修理以后被检测模型修正。云南区域被划分成56个格子房间让排水量地插值获得一块更一致的排水量地和一紧张地变化时间系列。每个格子房间扩大时间系列的地震前反应被评估并且综合了提取一个短逼近的地震异例鉴定索引。结果证明这个索引为大小M5的地震显示了出现时间和hypocenter。十四地震精确地被预言，并且有五份假报告。这个索引能因此被用于地震的短逼近的预言。

简介：Background:Couplingbiomassmodelswithnutrientconcentrationscanprovidesoundestimationsofcarbonandnutrientcontents,enablingtheimprovementofcarbonandnutrientbalanceinforestecosystems.Althoughnutrientconcentrationsareoftenassumedtobeconstantforsomespeciesandspecifictreecomponents,atleastinmaturestands,theconcentrationsusuallyvarywithage,siteindexandevenwithtreedensity.Themainobjectiveofthisstudywastoevaluatethesourcesofvariationinnutrientconcentrationsinbiomasscompartmentsusuallyremovedduringharvestingoperations,coveringarangeofspeciesandmanagementconditions:semi-naturalforest,conventionalforestplantationsandshortrotationforestry(SRF).Fivespecies(Betulapubescens,Quercusrobur,Eucalyptusglobulus,EucalyptusnitensandPopulusspp.)and14genotypeswereconsidered.Atotalof430treesweresampledin61plotstoobtain6biomasscomponents:leaves,twigs,thinbranches,thickbranches,barkandwood.AbovegroundleaflessbiomassWaspooledtogetherforpoplar.TheconcentrationsofC,N,K,P,Ca,Mg,S,Fe,Mn,Cu,ZnandBweremeasuredandtheto:[albiomassofeachsampledtreeandplotweredetermined.Thedatawereanalysedusingboostedregressiontreesandconventionaltechniques.Results:Themainsourcesofvariationinnutrientconcentrationswerebiomasscomponent>>genotype(species)≈age>treediameter.TheconcentrationsofCa,MgandKweremoststronglyaffectedbygenotypeandage.TheconcentrationsofP,K,Ca,Mg,SandCuinthewoodcomponentdecreasedwithage,whereasCconcentrationsincreased,withatrendtoreach50%intheoldertrees.IntheSRF,interamericanpoplarandP.trichocarpogenotypeswerecomparativelymoreefficientintermsofCaandKnutrientassimilationindex(NAI)(+65-85%)thaneucalypts,,mainlybecauseleaflessbiomasscanberemoved.Intheconventionaleucalyptplantations(rotation15years),debarkingthewoodatlogging(savingsof225%ofCaand254%ofMgforE.globulus)ortheuseofselectedgenotype

简介：目的:研究BCL6共抑制因子(BCOR)异构体(BCOR-short)对根尖牙乳头干细胞(SCAPs)成骨分化能力的影响。方法:利用HA-BCOR-short逆转录病毒载体在SCAPs中过表达BCOR-short,WesternBlot检测过表达效果;通过碱性磷酸酶(ALP)活性、茜素红染色及钙离子定量分析研究SCAPs体外成骨分化能力;实时定量RT-PCR检测SCAPs中骨涎蛋白(BSP)、骨钙素(OCN)和转录因子AP2A的表达。结果:WesternBlot结果显示HA-BCOR-short可以在SCAPs有效的过表达;ALP活性结果显示过表达HA-BCOR-short抑制SCAPs的ALP活性;茜素红染色及钙离子定量分析结果显示HA-BCOR-short明显抑制SCAPs体外矿化能力;实时定量RT-PCR结果显示过表达HA-BCOR-short明显抑制SCAPs中BSP、OCN和AP2A的表达。结论:过表达BCOR异构体BCOR-short可以抑制转录因子AP2A的表达,并且抑制SCAPs体外成骨分化功能。

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