简介:Thetitlecompounds4,4'-oxobis(propham)((?)n)(C20H24N2O5,Mr.=372.41)wassynthesizedbytheadditionreactionofcorresponding4,4'-oxobisphenyldiisocyanatewithisopropanol.ThecrystalstructurewasdeterminedbyX-raydiffractionmethod.Thecrystalistriclinicsystem,spacegroupP-1witha=8.5107(17),b=9.1164(18),c=14.5701(3)A,α=80.44(3),β=85.25(3),γ=62.88(3)°,V=992.2(3)A3,Z=2,Dc=1.247g/cm3,F(000)=396,R=0.0520,wR2=0.1434for4336observedreflectionswith[I>2σ(I)].X-rayana...
简介:Inordertoexplorethefeasibilityofcryopreservationondormantforesttreeseeds,theseedviabilityof4species(Malusbaccata,Prunusdavidiana,P.armenicaandAmygdalupersica)withmoisturecontent(MC)changingwastestedafter30-daystorageinliquidnitrogenof-196℃.Theresultsshowedthatallthe4speciesofseedscankeepastableviabilityaftercryopreservation.Intheprocedure,theoptimumMCwas48g/kgforM.baccata,27g/kgforP.davidiana,31g/kgforP.armenicaand45g/kgforA.persica,...
简介:Thecorrosiveratesof4typesofmetalsaswellasepoxy-coatedmetalinavarietyofpreservativesderivedfromdifferentcoppersourcesandingredientsweremeasuredinthispaper.Themainresultsshowthat:CCAislesscorrosivetoredbrassandQ235Asteelthanothercopperformulations;Copper-basedpreservativessuchasACQandCuAzderivedfrombasiccupriccarbonateorcuprichydroxidearemuchlesscorrosivetoQ235Asteelthanthosefromcupricsulfate;EthanolamineislesscorrosivetoQ235AsteelthanammoniainACQderivedfromcuprichydroxide,whileotheringredientsarethesame;Epoxyresincoatingcouldbeusedforprotectingredbrass,Q235Asteelandzinchot-dippedgalvanizedmildsteelfromcorrosion.
简介:Leafshapesarenotonlytheusefulindicatorsinplanttaxonomy,butalsotheimportantfactorsaffectingenergyandmaterialexchangeinleaves.Inthispaper,wecollectedandscannedtheleavesofNitrariatangutoruminDengkouofInnerMongoliaAutonomousRegion(themeanannualprecipitation145mm)andMinqinofGansuProvince(themeanannualprecipitation115mm)andN.sphaerocarpainDunhuang,andthenanalyzedleafshapeparameterswithImage-ProPlus6.0imageprocessingsoftwareandleafδ13CvaluesintheisotopelaboratoryoftheChineseAcademyofForestry.Theresultshowedthat:1)asleafareaincreasedwithincreasingwateravailabilitytheincreasesintheleaflengthandwidthwereasynchronously;2)withthesameleafwidth,the1eavesofN.tangutorumandN.sphaerocarpaweresignificantlylongerinhighwateravailableconditions;and3)althoughthereweresignificantlydifferencesinwateravailabilitybetweenDengkouandMinqin,aswellasbetweenthebottomandmiddleofthealluvialfanneartheEastLakeinDunhuang,theleafδ13CvaluesofN.tangutorumorN.sphaerocarpaweresimilarindifferentwaterconditions(P>0.05).Ourresultssuggestedthattheratioofleafperimetertoareawouldbeanimportantfactorwhichlinkedleafshapetoplantwaterphysiology.Duringgrowingprocedureofleafarea,leaflengthincreasewaspriortoitswidthtoalleviatethereductioninratioofperimetertoareaandmaintainwateruseefficiencyoftheplant.
简介:Afragmentwithabout798bpofcabgenewasamplifiedfromthefirststrandofMoso(Phyllostachysedulis)cDNAthroughRT-PCRmethod,namedascab-PhE4(cabgene4fromPh.edulis).Thecab-PhE4(GenBankaccessionnumber:EF405878)geneencodes265aminoacid.Thebioinformaticsanalysisindicatedthattheproteinencodedbycab-PhE4hasachlorophylla/b-bindingdomain(64th-232ndposition),aproteinkinaseCphosphorylationsite(33rd-35thposition),aN-myristoylationsite(169th-174thposition),andaninvolucrinrepeat(207th-216thposition).Theaminoacidsequenceofcab-PhE4showedhighsimilaritywiththecabgenesofZeamays,Triticumaestivum,Musaacuminata,PanaxginsengandOryzasativa,morethan90%,respectively.
简介:GPS12C/XLC应用于森林调查是今后森林调查的发展方向,对今后森林资源一类,二类调查时广泛使用GPS12C/XLC提出建议。