GH-Ⅲ型光合测定仪简介

GH型光合测定仪,是根据在一定温度及气压条件下,一定浓度的碳酸氢钠溶液的pH值能随着熔解在其中的二氧化碳数量而改变,溶液能吸收或放出二氧化碳与空气中的二氧化碳浓度保持平衡关系的原理而制作的。几年来从Ⅰ型到Ⅱ型,经有关单位使用效果良好。现经改进的Ⅲ型,更有如下几方面的优点:     

CLASSIFICATION OF PANTOLAMBDODONTIDAE (PANTODONTA,MAMMALIA)

l.Weoriea1revlewl)PaatolambdodontidaeFossilsfoundbytheAsianExpeditionofAmericanMuseumofNaturalHistoryinSharaMurunarea,NeiMongolinl925andl928forthefirsttimeweredescribedbyGrangerandGregory(l934)asnewgenusandspe-cies,PantolambdodoninermisandP.lortis,andforwhichanewfamily,Pantola-mbdodontidae,wascreatedatthesametime.Inl978Tongdescribedafragmentary1owerjawwithm2andtrigonidofm3fromtheLatePaleoceneTaizicunFormation,Xinjiangandestablishedanewgenusandspecies,Dilambdaspeciosa.InthesameyearCho…     

FACTOR ANALYSIS OF THE MAJOR AGRONOMIC TRAITS IN SUNFLOWER

Sunflower(Heliantlusan)7llusL.)isanimportantoileredcropinChiest.Sunflowerbreedersusuallyneedtotv:~l~atemanyagronol:liccharacterssuchasseedquality,adaptability?resistancetostressesandseedyieldfortheobjectiyeexttnlinationofdifferentgenotypesintermsofcornlllerclaIyalug.However,tileco171plice.1edIntoracticnbetxt=eentllesctraitshavefrequently-causedinconvenienceintiledocision--makingstages.Factoranalysiswb,sproposedasa1,lultivaridtenletllodforsolvingthisproblemandwasexpecLcdtoreflectthenaturealld…     

《中国物理学文献数据库》通知

《激光生物学报》编辑部 :《中国物理学文献数据库》来源刊一年一度的动态调整已经结束 ,通过对来源刊质量 ,学术水平状况 ,被《中国物理学文献数据库》引用情况 ,用户检索查询情况等几方面的综合评价 ,我们很高兴地通知您 ,贵刊正式成为《中国物理学文献数据库》的来源刊。《中国物理学文献数据库》是国内最早建成的物理专业文献数据库 ,作为刊、库合一产品的《中国物理文摘》(双月刊 )也是国家一级检索刊物 ,多次获得全国科技文献检索期刊评比二等奖。《中国物理学文献数据库》曾于 1995年获中科院科技进步二等奖 ,收录了物理学及其相关领…     

第二十四讲 近似昼夜节奏—生物钟

目录一、内生昼夜节奏及其例证二、近似昼夜节奏的特征三、近似昼夜节奏作为植物体内节奏性计时器及其适应意义     

Molecular studies resolve Nyholmiella (Orthotrichaceae) as a separate genus

Two Orthotrichum species of the subgenus Orthophyllum were compared with other representatives of this genus using internally transcribed spacer regions 1 and 2, the chloroplast trn H-psbA region, and inter-simple sequence repeat (ISSR) and intron-exon splice conjunction (ISJ) markers. The ISSR and ISJ markers used revealed many bands and mutations specific only to O. Gymnostomum and O. Obtusifolium. Phylogenetic analysis clearly supported previous concepts postulating that species of the subgenus Orthophyllum should be recognized as the separate genus Nyholmiella.     

Pathogenesis and Associated Diseases of Kaposi's Sarcoma-associated Herpesvirus

Kaposi's sarcoma-associated herpesvirus(KSHV)is the primary etiological agent of Kaposi's sarcoma,primary effusion lymphoma and muticentric Castleman's disease.In common with the other herpesviruses,KSHV exhibits both latent and lytic life cycles,both of which are characterized by distinct gene expression profiles and programs.KSHV encodes proteins which play essential roles in the inhibition of host adaptive and innate immunity,the inhibition of apoptosis,and the regulation of the cell cycle.KSHV also encodes several proteins which have transforming and intrcellular signalling activity.