简介：超声的抽取(UE)为竹子叶多糖(BLP)的抽取被采用。包括抽取时间，超声的力量和固体/液体的比率的UE过程的有影响的参数被直角的实验优化。DEAE纤维素列层析被使用净化BLP然后BLP的激进的清除活动也被评估。最佳的抽取条件是：15min，300W的超声的力量，和1:15的固体/液体的比率的抽取时间。四种多糖被DEAE纤维素列层析获得；清除的最大的superoxide激进分子BLP的率(20.4%)低于维生素C的(VC，控制)并且清除的氢氧根激进分子率(50%)等价于VC的。

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简介：Nitratereductaseactivity(NRA)indifferentplantorgansandleavesindifferentpositionsofCamptothecaacuminataseedlingswasdeterminedbyanInvivoassay,thediurnalvariationrhythmofNRAinleavesofdifferentpositionswasobserved,andthecorrelationsbetweenleafNRA,leafareaandlaminamassperunitarea(LMA)werealsoexamined.TheresultsshowedthatNRAintheleafwassignificantlyhighest,comparedwiththatinotherorganssuchasroots,stemsandleaves.Inthisexperiment,the10leaveswereselectedfromtheapextothebaseoftheseedlingsinorder.ThedifferentNRAoccurredobviouslyinleavesofdifferentpositionsofC.acuminataseedlingsfromtheapextothebase,andNRAwashigherinthe4th-6thleaves.ThediurnalchangerhythmofleafNRAshowedaonepeakcurve,andmaximumNRAvalueappearedataboutmidday(at12:30orso).NoobviouscorrelationsbetweenNRAandleafareaorlaminamassperunitareawereobserved.ThisstudyofferedscientificfoundationforthefurtherresearchonnitrogenmetabolismofC.acuminata.

简介：有对Helicoverpaarmigera的内脏朊酶的活动的一个Bowman-Birk禁止者从Albizialebbeck的使脱去脂肪的种子面粉在0.1M钠磷酸盐缓冲区被提取。它在DEAE-SephadexA50上用铵硫酸盐降水，SephadexG-100列上的胶化过滤层析和离子交换层析与51.43%恢复被净化到29.62褶层。净化的蛋白质有由SDS页决定了的12,303daltons的分子的重量。是热被发现稳定直到60

简介：Toxin,oneofthemostimportantfactorsofplantfungaldisease,hasattractedmuchattentionofmanyacademicianswhohavebeenstudyingpathogenmycotoxinindeepresearch.Thepapersummarizedchemicalstructuresofsomehost-selectiveplantpathogenmycotoxinsdiscoveredinrecentyearsandthecorrelationbetweenbiologicalactivityandchemicalstructureoftoxin.

简介：ThehumidagroclimaticconditionsofKerala,IndiapermitthecultivationofanarrayofbamboospeciesofwhichDendrocalamusstrictusRoxb.(Nees.)isanimportantoneonaccountofitshighgrowthrateandmultipleuses.Standdensity,apotentialtoolincontrollingtheproductivityofwoodyecosystems,itseffectongrowthandrootdistributionpatternsmayprovideabetterunderstandingofproductivityoptimizationespeciallywhenbamboo-basedintercroppingoptionsareconsidered.Growthattributesof7-year-oldbamboo(D.strictus)standsmanagedatvariablespacing(494m,696m,898m,10910m,12912m)werestudied.Functionalrootactivityamongbambooclumpswerealsostudiedusingaradiotracersoilinjectionmethodinwhichtheradioisotope32Pwasappliedtosoilatvaryingdepthsandlateraldistancesfromtheclump.Resultsindicatethatspacingexertsaprofoundinfluenceongrowthofbamboo.Widelyspacedbambooexhibitedhigherclumpdiametersandcrownwidthswhileclumpheightswerebetterundercloserspacing.Clumpheightwas30%lowerandDBH52%higheratthewidestspacing(12912m)comparedtotheclosestspacing(494m).Withincreasingsoildepthandlateraldistance,rootactivitydecreasedsignificantly.Rootactivityneartheclumpbasewashighest(809countsperminute,cpm;50cmdepthand50cmlateraldistance)at494m.Tracerstudyfurthershowedwiderdistributionofrootactivitywithincreaseinclumpspacing.Itmaybeconcludedthattheintensiveforagingzoneofbambooiswithina50-cmradiusaroundtheclumpirrespectiveofspacing.N,PandKcontentintheupper20cmwas2197,21,and203kg/harespectivelyforthecloselyspacedbamboo(494m)whichweresignificantlyhigherthancorrespondingnutrientcontentatwiderspacings.About50%ofN,PandKwerepresentwithinthe0-20cmsoillayer,whichdecreaseddrasticallybeyondthe20cmdepth.Theresultssuggestthatstandmanagementpracticesthroughplantingdensityregulationcanmodifyt

简介：更好在土壤上理解森林继任的效果微生物引起的活动，土壤的比较微生物引起的性质和营养素在代表自然森林继任chronosequence的三种森林类型之间被进行。学习比较了松(Pinusmassoniana)森林(P松和阔叶烟草混合了的F),森林(MF)并且一常绿树阔叶烟草森林(BYingzuijie生物圈储备地的F),，湖南省，中国。结果显示出那土壤在MF和BF阴谋比在PF阴谋。在微生物引起的生物资源碳的范围与B有最大的价值的F，5221022?mg?kg1,由MF368569?mg?kg1,并且最后，PF193449?mg?kg1。土壤营养素更强烈比基础呼吸或新陈代谢的商与微生物引起的生物资源碳被相关。总的来说，在学习地点的森林继任改善了玷污微生物引起的性质并且玷污富饶，它能接着增加主要生产率和碳隐遁。

简介：ThetaigaconiferousforestsoftheSiberianregionarethemaincarbonsinksintheforestecosystems.Quantitatively,thesizeofthecarbonaccumulationisdeterminedbythephotosyntheticproductivity,whichisstronglyinfluencedbyenvironmentalfactors.Asaresult,anassessmentoftherelationshipbetweenenvironmentalfactorsandphotosyntheticproductivitymakesitpossibletocalculateandevenpredictcarbonsinksinconiferousforestsattheregionallevel.However,atvariousstagesofthevegetativeperiod,theforceoftheconnectionbetweenenvironmentalconditionsandtheproductivityofphotosynthesismaychange.Inthisresearch,correlationsbetweenthephotosyntheticactivityofScotspine(PinussylvestrisL.)withtheenvironmentalconditionswerecomparedinspringandinautumn.Inspring,closepositivecorrelationofthemaximumdailynetphotosynthesiswasidentifiedwithonlyoneenvironmentalfactor.Fordifferentyears,correlationswereforsoiltemperature(rs=0.655,p=0.00315)oravailablesoilwatersupply(rs=0.892,p=0.0068).Inautumnwithindifferentyears,significantcorrelationwasshownwithtwo(temperatureofairandsoil;rs=0.789and0.896,p=0.00045and0.000006,respectively)andfourfactors:temperatureofair(rs=0.749,p=0.00129)andsoil(rs=0.84,p=0.00000),availablesoilwatersupply(rs=0.846,p=0.00013)andirradiance(rs=0.826,p=0.000001).Photosyntheticactivityhasaweakerconnectionwithchangesinenvironmentalfactorsinthespring,ascomparedtoautumn.Thisisexplainedbythemultidirectionalinfluenceofenvironmentalconditionsonphotosynthesisinthisperiodandbythenecessityofearlierphotosynthesisonset,despitetheunfavorableconditions.Thisdatamaybeusefulforpredictingtheflowofcarbonindependenceonenvironmentalfactorsinthisregioninspringandinautumn.

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