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817篇 您的检索式:作者名="Johnson L T"
    题名 作者 年代 出处 被引量
1板块构造机制在显生宙初期发生转变显示文摘虽然目前对于板块构造何时成为主要构造机制存在争议,但是研究者普遍认为在古太古代已经完成转变。元古代时期,哥伦比亚超大陆向罗迪尼亚超大陆的转换,并未发生超大陆的完全裂解和聚合,而是岩石圈和环境的相对稳定期。相比之下,成冰期至今则发育有大量的被动大陆边缘,以及在425~225 Ma期间大幅增加的裂谷和大陆岛弧长度,表明存在与潘吉亚超大陆形成密切相关的激烈板块构造活动。袁超(编译) Brown M Kirkland C L Johnson T E 2020矿物岩石地球化学通报2020,39,4:9
2Ammonia-oxidizing archaea and bacteria are structured by geography in biological soil crusts across North American arid lands显示文摘Introduction:Biological soil crusts(BSCs)can dominate surface cover in dry lands worldwide,playing an integral role in arid land biogeochemistry,particularly in N fertilization through fixation and cycling.Nitrification is a characteristic and universal N transformation in BSCs that becomes important for the export of N beyond the microscopic bounds of the crust itself.The contribution of ammonia-oxidizing bacteria(AOB)in BSCs has been shown,but the role and extent of the recently discovered ammonia-oxidizing archaea(AOA)have not.Methods:We sampled various types of crusts in four desert regions across the western United States and characterized the composition and size of ammonia-oxidizing communities using clone libraries and quantitative PCR targeting the amoA gene,which codes for the ammonia monooxygenase enzyme,universally present in ammonia-oxidizing microbes.Results:All archaeal amoA sequences retrieved from BSCs belonged to the Thaumarchaeota(Nitrososphaera associated Group I.1b).Sequences from the Sonoran Desert,Colorado Plateau,and Great Basin were indistinguishable from each other but distinct from those of the Chihuahuan Desert.Based on amoA gene abundances,archaeal and bacterial ammonia oxidizers were ubiquitous in our survey,but the ratios of archaeal to bacterial ammonia oxidizers shifted from bacterially dominated in northern,cooler deserts to archaeally dominated in southern,warmer deserts.Conclusions:Archaea are shown to be potentially important biogeochemical agents of biological soil crust N cycling.Conditions associated with different types of BSCs and biogeographical factors reveal a niche differentiation between AOA and AOB,possibly driven by temperature.Yevgeniy Marusenko Scott T Bates Ian Anderson Shannon L Johnson Tanya Soule Ferran Garcia-Pichel 2013Ecological Processes2013,2,1:4
3Crenarchaeotal lipids in lake sediments: A new paleotemperature proxy for continental paleoclimate reconstruction? 显示文摘Powers L A Werne J P Johnson T C 2004Geology2004,32,:1
4Refining normal and genetically enhanced soybean oils obtained by various extraction methods显示文摘Wang T Johnson L A 2001JAOCS2001,78,8:1
5Characterization of the chicken interleukin-lbeta convertion enzyme (caspase-1) cDNA and expression of caspase-1 mRNA in the hen显示文摘JOHNSON A L BRIDGHAM J T WITY J P 1998Gene1998,219,:1
6Zinc-induced conformational changes in the DNA-binding domain of the vitamin D receptor determined by electrospray ionization mass spectrometry显示文摘VEENSTRA T D JOHNSON K L TOMLINSON A J 1998J Am Soc Mass Spectrom1998,9,:1
7Protecting plants from elephants:botanical reserve scenarios within the Addo Elephant National Park,South Africa显示文摘Lombard A T Johnson C F Cowling R M Pressey R L 2001Biological Conservation2001,,2:1
8Differences in somatic perception in female patients with irritable bowel syndrome with and without fibromyalgia 显示文摘Chang L Mayer EA Johnson T 2000Pain2000,84,23:1
9Neonatal intracranial-intraocular hemorrhage ' Terson syndrome':A case report and review of the literature显示文摘Sawyer T Johnson L Ballard B 0,,:1
10Advancing fine root research with minirhizotrons显示文摘Johnson M G Tingey D T Phillips D L 2001Environmental and Experimental Botany2001,45,3:1
11Cells expressing indoleamine 2, 3-dioxygenase inhibit T cell responses显示文摘Mellor A L Keskin D B Johnson T 2002J Immunol2002,168,:1
12Heating and Pain Sensation Produced in Human Skin by Millimeter Waves:Comparison to a Simple Thermal Model显示文摘WALTERS T BLICK D JOHNSON L 2000Health Physics2000,78,3:1
13NFkappaB and AP-1 mediate transcriptional responses to oxidative stress in skeletal muscle cells显示文摘ZHOU L Z H JOHNSON A P RANDO T A 2001Free Radical Biology and Medicine2001,31,11:1
14Organization and regulation of mitogen-activated protein kinase signaling pathways显示文摘Garrington T P Johnson G L 1999Curr Opin Cell Biol1999,11,:1
15Activation of the ! Akt/Protein Kinase B Signaling Pathway Is Associated with Granulosa CeH Survival显示文摘Johnson A L Bridgham J T Swenson J A 2001Biology of Reproduction2001,64,5:1
16The exercise of interfirm power and its repercussions in US-Japanese channel rela- tionships显示文摘Johnson J L Sakano T Cote J A 1993Journal of Marketing1993,57,2:1
17The social fabric of a team based MBA program显示文摘Baldwin T T Bedell M D Johnson J L 0,,06:1
18Processing of Soot in an Urban Environment:Case Study from the Mexico City Metropolitan Area显示文摘Johnson K S Zuberi B Molina L T 0,,:1
19Crystal struc- ture of the thioesterase domain of human fatty acid synthase inhibited by Orlistat显示文摘Pernhle C W Johnson L C and Lowther W T 2007Nat Struct Mol Biol2007,14,:1
20Vinorelbine plus cisplatin vs observation in resected non-small cell lung cancer Intergroup显示文摘Winton T L Livingston R Johnson D 2005N Engl J Med2005,25,352:1
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