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川东北二叠纪吴家坪期牙形石(刺)序列及其世界对比 总被引:14,自引:3,他引:11
对四川省宣汉县渡口和南江县桥亭吴家坪期地层的系统采集和研究结果表明,吴家坪期至少包括7个牙形石带,自下而上为Clarkinadukouensis带,C.asymmetrica带,C.leveni带,C.guanyuanensis带,C.transcaucasica带,C.orientalis和C.inflecta带。其中,前3个带的层位低于一直作为吴家坪期早期的C.liangshanensis带。吴家坪阶的顶界以置于C.inflecta带与C.subcarinata带之间较妥。同时,建立了Clarkinadukouensis,C.asymmetrica,C.bizarrensis,C.daxianensis,C.demicornis,C.inflecta,C.longicuspidata等7个新种。 相似文献
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我国南海海龟资源的调查与保护研究现状与展望王亚民(中华人民共和国农业部水产司,北京100026)AchievementandPerspectiveoftheResearchesonSoutbChinaSeaTurtleResourcesandProtectioninCbina¥WangYamin(DivisionofScienceandTechnology,DepartmentofFishery,People’sRepublicofChinaMinistryofAgriculture,Beijing100026).ChineseJournalofEcology,1993,12(6):60-61.ThispaperintroducestheresearchesinfieldofSouthChinaSeaturtleresourcesandprotectioninChina.TherearefivespeciesseaturtlesinChina,about90%ofthemliveinSouthChinasea。During1959-1988,3184.Itseaturtlewerecatched(about 相似文献
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湖北省吨粮田的现状及其投肥效率分析孙先(华中农业大学,武汉430070)CurrentSituationandFertilizationEfficiencyofHighProductiveCroplandsinHubeiProvince¥SunXian-rong(CentralChinaAgricultureUniversity,Wuhan430070).ChineseJournalofEcologyl1993,12(2):55-56.Since1990,thedevelopmentofhighproductivecroplandhasbeenacceleratedandtheeffectofitsyieldandbenefitincreaseisveryobvious,But,whetherhighyieldandhighefficiencycanbesynchronizedde-servescloseattention,Inthisresearch,79highyieldcroppingpatternsareinvestigatedforthreeyearsinHubeiandtheirefficien 相似文献
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毛药山茶 新种 图 1CamelliarenshanxiangiaeC .X .YeetX .Q .Zheng ,sp .nov . (Subgen .MetacamelliaH .T .Chang,Sect.EriandriaCohen Stuart) .Fig .1SpeciesC .crateraeH .T .ChangetC .trigonocarpaeH .T .Changaffinis,sedillafloribusrubris (testenotulacollectoris) ,bracteolissepalisqueutrinq… 相似文献
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CadherinsaremembranousCa2+dependent,homophilic,adhesionmoleculesthatareassumedtoplayessentialrolesincellrecognition,cellsorting,embryonicmorphogenesisandsignaltransduction[1,2].ThesetransmembranemoleculesformaplaquethroughitscytoplasmicdomainatCtailwiththe… 相似文献
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融安唇柱苣苔 新种 图 1ChiritaronganensisD .FangetY .G .Wei,sp .nov .(Chiritasect.GibbosaccusC .B .Clarke) .Fig .1HabitusimilisC .gemellaeD .Wood ,quaerhizomatestolonifero ,foliisellipticisvelobovatisminoribusintegris,cymis 1~ 4_floris,corollaetubiore 1 7mmdiam .,staminumfilamentiss… 相似文献
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《天然产物研究与开发》2001,13(2)
January 17 2 0 ,2 0 0 1:IndependentPharmacyChainConference ,ScottsdalePrincessResort,Scottsdale,Arizona .Contact:NCPAExhibitsmanager( 70 3 )683 3 619(fax) .February 2 0 2 3 ,2 0 0 1:EXPO 2 0 0 1,NationalCommunityPharmacistsAssoci ation ,ChainDrugMarketingAssociation ,NationalHomeInfusio… 相似文献
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本文报道9种尾孢菌,其中有2个新种:蟹甲草尾孢 Cercospora cacaliae Y. L. Guo & Y.Jiang和菜蓟尾孢Cercospora cynarae Y. L. Guo & Y. Jiang,中国新记录种有迪氏尾孢Cercosporademetrioniana G. Winter,田菁生尾孢 Cercospora glothidiicola Tracy & Earle,甘草尾孢 Cercosporaglycyrrhizae (Savulescu & Sandu)Chupp,野桐尾孢Cercospora malloti Ellis & Evsrh,木薯尾孢Cercospora manihobae Viegas,补骨脂尾孢 Cercospora psoraleae-bituminosae Savul.& Sandu和香豆尾孢Cercospora traversiana Sacc。文中为新种提供了拉丁文描述并附图,研究的标本保存在中国科学院微生物研究所菌物标本馆(HMAS)。 相似文献
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农业生态学在我国发展的回顾与展望 总被引:5,自引:0,他引:5
农业生态学在我国发展的回顾与展望骆世明(华南农业大学,广州510642)ReviewandPerspectiveonDevelopmentofAgroecologyChina.¥LuoShiming(SouthChinaAgriculturalUniversity,Guangzhou510642).ChineseJournalofEcology,1993,12(2):4-6.Inlastdecade,greatprogresshasbeenmadeintheteachingandresearchofagriculturalecologyinChi-na,butsomeobstaclesstillexistonhowtounderstandagroecology.Ifwecanrecognizethesocialde-mandofagroecologyanditspositioninagriculturalscienceandpayattentiontothedescription,assess-ment,experimentandanalysisofagroecosystemmodels,thequanti 相似文献
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本文记载了中国西南牡竹属二新种,席竹DendrocalamusexilisXiaetChia,钓鱼竹DendrocalamusguiyangensisXiaetCia,并对妈竹BambusaboniopsisMcCl.、大眼竹B.eutuldoidesMcCl.、撑篙竹B.pervariabilisMcCl.、紫秆竹B.textilisMcCl.cv.Purpurascens和佛肚竹B.ventricosaMcCl.的花作了补充描述. 相似文献
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《天然产物研究与开发》2002,14(3)
20 0 1 :January 17~ 2 0 ,2 0 0 1:IndependentPharmacyChainConference ,ScottsdalePrincessResort,Scottsdale ,Arizona .Contact:NCPAExhibitsmanager(70 3 ) 683~ 3 619(fax) .February 2 0~ 2 3 ,2 0 0 1:EXPO 2 0 0 1,NationalCommunityPharmacistsAssociation ,ChainDrugMarketingAssociation ,NationalHomeI… 相似文献
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《天然产物研究与开发》2002,14(1)
20 0 1 :January 17~ 2 0 ,2 0 0 1:IndependentPharmacyChainConference ,ScottsdalePrincessResort,Scottsdale ,Arizona .Contact:NCPAExhibitsmanager( 70 3) 6 83~ 36 19(fax) .February 2 0~ 2 3,2 0 0 1:EXPO 2 0 0 1,NationalCommunityPharmacistsAssociation ,ChainDrugMarketingAssociation ,NationalHomeI… 相似文献
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ProteinkinaseCisacrucialenzymefamilyinthecontrolofsignaltransductionandisinvolvedindiversecellactions[1].TheactivityofclassicalPKC(cPKC),whichisoneofthethreesubgroups,notonlydependsoncalciumandphosphatidylserine,butalsoisregulatedbydiacylglycerols,unsatur… 相似文献
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ProfessorWANGYing Lai,world renownedbiochemistandamemberoftheChineseAcademyofSciences ,passedawayat 19:10 ,May 5,2 0 0 1resultingfromanincurabledisease .Sincethen ,theChineseCommunistPartyhaslostanoutstandingmemberstrugglingallhislifeforthedevelopmentofscienceinC… 相似文献
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mRNA differential display between sterile and fertile anther of rice and analysis of cDNA differential fragments 总被引:3,自引:0,他引:3
Cytoplasmicmalesterility(CMS)inhighplantsisamaternallyinheritedtraitthatsuppressesviablepollenproductionandisextremelyvaluablefortheproductionofhybridseeds.ApplicationofCMSricetodevelopmentofhybridricevarietieshasalreadybeenavailableinChinasince1976.Inre… 相似文献
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中国南方低丘红壤区人工复合生态系统模式建造研究 总被引:2,自引:0,他引:2
中国南方低丘红壤区人工复合生态系统模式建造研究徐盛荣,吴珊眉,李辉信(南京农业大学土壤农业化学系,210014)ModelingofArtificialComplexEcosysteminLow-hillyRedSoilRegionofSouthCbina¥.XuShengrong;WuShanmei;LiHuixin(DepartmentofSoilScienceandAgriculturalChemistry,NanjingAgriculturalUniversity).ChineseJournalofEcology,1993,12(2):39—40.Thispaperresearchesintothemodelingofartificialcomplexecosystemincorporatingcrop,fruit,forestandanimalhusbandrywithinacatchmentarea,whichisabasicunitoflowhillyregioninsouthChina.Themodelproducessignificantandcomprehensiveprofits.Fi 相似文献
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浸润垄作稻田土壤生态系统的研究 总被引:7,自引:0,他引:7
浸润垄作稻田土壤生态系统的研究魏朝富,高明,车福才,邓春(西南农业大学土化系重庆630716)AStudyonInfiltrated-RidgedPaddySoilEcosystem¥.WeiChaofu;GaoMing,CheFuchai;DengChun(SouthwestAgriculluralUniversity,).ChineseJournalofEcology,1993,12(3):26-30;Thispaperdealswichaninfiltrated-ridgedpaddysoilecosystemwhichisconstructedbyridgingandcon-tinuousfurrowinfiItratiOnirrigation,ComparingwithlevelinfiItratedpaddysoilecosystem,thisecosys-temhascoexistedgas-liquid,gas-solidandliquid-solidinterfaces,enlargessoilsurfaceby38%andincreasescuItivatedlayerby5-10cm. 相似文献
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Effect of mouse thymic medullary epithelial cell line on thymocyte development and functional maturation in vivo 总被引:1,自引:0,他引:1
Duringthymicdevelopment,interactionsbetweenTCRonthymocytesandMHCmoleculesonthymicstromalcellsdeterminethefateofimmaturethymocytes[1].(i)Positiveselection:thematurationofthymocytesintoselfMHCrestrictedantigenspecificandselftolerantTcells;(ii)negetiveselect… 相似文献
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东濮凹陷早第三纪的海侵(泛)事件 总被引:11,自引:0,他引:11
依据生物化石Sphenolithus ciperoensis,Dictyococcites abisectus,Coccolithus pelagicus,Reticulofenestra sp.,Sinocysta minuta,S.subtilis,Cordosphaeridium,Achomosphaera,Spiniferites,Ophinomorpha nodosa,Cladosiph 相似文献