Now showing items 495-514 of 812

  • N budgets and aquatic uptake in the Ipswich River basin, northeastern Massachusetts 

    Williams, Michael; Hopkinson, Charles S.; Rastetter, Edward B.; Vallino, Joseph J. (American Geophysical Union, 2004-11-05)
    We calculated N budgets and conducted nutrient uptake experiments to evaluate the fate of N in the aquatic environment of the Ipswich River basin, northeastern Massachusetts. A mass balance indicates that the basin retains ...
  • N-15 in symbiotic fungi and plants estimates nitrogen and carbon flux rates in Arctic tundra 

    Hobbie, John E.; Hobbie, Erik A. (Ecological Society of America, 2006-04)
    When soil nitrogen is in short supply, most terrestrial plants form symbioses with fungi (mycorrhizae): hyphae take up soil nitrogen, transport it into plant roots, and receive plant sugars in return. In ecosystems, the ...
  • Na+ imaging reveals little difference in action potential–evoked Na+ influx between axon and soma 

    Fleidervish, Ilya A.; Lasser-Ross, Nechama; Gutnick, Michael J.; Ross, William N. (2010-05-09)
    In cortical pyramidal neurons, the axon initial segment (AIS) plays a pivotal role in synaptic integration. It has been asserted that this property reflects a high density of Na+ channels in AIS. However, we here report ...
  • Names are key to the big new biology 

    Patterson, David J.; Cooper, J.; Kirk, Paul M.; Pyle, R. L.; Remsen, David P. (2010-09-20)
    Those who seek answers to big, broad questions about biology, especially questions emphasizing the organism (taxonomy, evolution, ecology), will soon benefit from an emerging names-based infrastructure. It will draw on ...
  • Nematostella Embryonic Transcriptome 

    Tulin, Sarah; Aguiar, Derek; Istrail, Sorin; Smith, Joel (2012-12-12)
    RNA-Seq was performed on Nematostella Embryos at 5 timepoints during early development: 0hrs, 6hrs, 12hrs, 18hrs, 24hrs after fertilization. Embryos were harvested, lysed and mRNAs were selected using Dynabeads. Directional ...
  • Nematostella High-density RNAseq time-course 

    Fischer, Antje H. L.; Smith, Joel (2013-06-14)
    RNA-Seq was performed on Nematostella embryos at 20 timepoints: unfertilized eggs, 1hour post fertilization (hpf), 2hpf, 3hpf, 4hpf, 5hpf, 6hpf, 7hpf, 8hpf, 9hpf, 10hpf, 11hpf, 12hpf, 13hpf, 14hpf, 15hpf, 16hpf, 17hpf, ...
  • Nematostella vectensis BAC sequences 

    Fischer, Antje H. L.; Tulin, Sarah; Fredman, David; Smith, Joel (2013-07-11)
    A key tool for investigating the regulation of genes is represented by Bacterial Artificial Chromosomes-reporter constructs (BAC). BACs are large insert libraries, often >>100 kb, which thus capture the genomic sequences ...
  • The nerve hemoglobin of the bivalve mollusc Spisula solidissima : molecular cloning, ligand binding studies, and phylogenetic analysis 

    Dewilde, Sylvia; Ebner, Bettina; Vinck, Evi; Gilany, Kambiz; Hankeln, Thomas; Burmester, Thorsten; Kreiling, Jill A.; Reinisch, Carol L.; Vanfleteren, Jacques R.; Kiger, Laurent; Marden, Michael C.; Hundahl, Christian; Fago, Angela; Van Doorslaer, Sabine; Moens, Luc (American Society for Biochemistry and Molecular Biology, 2005-12-13)
    Members of the hemoglobin (Hb) superfamily are present in nerve tissue of several vertebrate and invertebrate species. In vertebrates they display hexacoordinate heme iron atoms and are typically expressed at low levels ...
  • Net emissions of CH4 and CO2 in Alaska : implications for the region's greenhouse gas budget 

    Zhuang, Qianlai; Melillo, Jerry M.; McGuire, A. David; Kicklighter, David W.; Prinn, Ronald G.; Steudler, Paul A.; Felzer, Benjamin S.; Hu, Shaomin (Ecological Society of America, 2007-01)
    We used a biogeochemistry model, the Terrestrial Ecosystem Model (TEM), to study the net methane (CH4) fluxes between Alaskan ecosystems and the atmosphere. We estimated that the current net emissions of CH4 (emissions ...
  • Net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere and their contributions to global climate warming 

    Tian, Hanqin; Xu, Xiaofeng; Lu, Chaoqun; Liu, Mingliang; Ren, Wei; Chen, Guangsheng; Melillo, Jerry M.; Liu, Jiyuan (American Geophysical Union, 2011-05-13)
    China's terrestrial ecosystems have been recognized as an atmospheric CO2 sink; however, it is uncertain whether this sink can alleviate global warming given the fluxes of CH4 and N2O. In this study, we used a process-based ...
  • NetiNeti : discovery of scientific names from text using machine learning methods 

    Akella, Lakshmi Manohar; Norton, Cathy N.; Miller, Holly (BioMed Central, 2012-08-22)
    A scientific name for an organism can be associated with almost all biological data. Name identification is an important step in many text mining tasks aiming to extract useful information from biological, biomedical and ...
  • NetiNeti : Discovery of Scientific Names from Text Using Machine Learning Methods Figure 1 

    Akella, Lakshmi Manohar (2011-12-30)
    A scientific name for an organism can be associated with almost all biological data. Name identification is an important step in many text mining tasks aiming to extract useful information from biological, biomedical and ...
  • NetiNeti : Discovery of Scientific Names from Text Using Machine Learning Methods Figure 2 

    Akella, Lakshmi Manohar (2011-12-30)
    A scientific name for an organism can be associated with almost all biological data. Name identification is an important step in many text mining tasks aiming to extract useful information from biological, biomedical and ...
  • NetiNeti : Discovery of Scientific Names from Text Using Machine Learning Methods Figure 3 

    Akella, Lakshmi Manohar (2012-08-17)
    A scientific name for an organism can be associated with almost all biological data. Name identification is an important step in many text mining tasks aiming to extract useful information from biological, biomedical and ...
  • NetiNeti : Discovery of Scientific Names from Text Using Machine Learning Methods Table 1 

    Akella, Lakshmi Manohar (2012-08-17)
    A scientific name for an organism can be associated with almost all biological data. Name identification is an important step in many text mining tasks aiming to extract useful information from biological, biomedical and ...
  • NetiNeti : Discovery of Scientific Names from Text Using Machine Learning Methods Table 2 

    Akella, Lakshmi Manohar (2012-01-27)
    A scientific name for an organism can be associated with almost all biological data. Name identification is an important step in many text mining tasks aiming to extract useful information from biological, biomedical and ...
  • Neural control of tuneable skin iridescence in squid 

    Wardill, Trevor J.; Gonzalez-Bellido, Paloma T.; Crook, Robyn J.; Hanlon, Roger T. (2012-07-25)
    Fast dynamic control of skin coloration is rare in the animal kingdom, whether it be pigmentary or structural. Iridescent structural coloration results when nanoscale structures disrupt incident light and selectively reflect ...
  • Neuronal calcium sensor-1 enhancement of InsP3 receptor activity is inhibited by therapeutic levels of lithium 

    Schlecker, Christina; Boehmerle, Wolfgang; Jeromin, Andreas; DeGray, Brenda; Varshney, Anurag; Sharma, Yogendra; Szigeti-Buck, Klara; Ehrlich, Barbara E. (American Society for Clinical Investigation, 2006-06)
    Regulation and dysregulation of intracellular calcium (Ca2+) signaling via the inositol 1,4,5-trisphosphate receptor (InsP3R) has been linked to many cellular processes and pathological conditions. In the present study, ...
  • Neurovascular interaction and the pathophysiology of diabetic retinopathy 

    Qian, Haohua; Ripps, Harris (Hindawi Publishing, 2011)
    Diabetic retinopathy (DR) is the most severe of the several ocular complications of diabetes, and in the United States it is the leading cause of blindness among adults 20 to 74 years of age. Despite recent advances in our ...
  • New criteria for selecting the origin of DNA replication in Wolbachia and closely related bacteria 

    Ioannidis, Panagiotis; Dunning Hotopp, Julie C.; Sapountzis, Panagiotis; Siozios, Stefanos; Tsiamis, Georgios; Bordenstein, Seth R.; Baldo, Laura; Werren, John H.; Bourtzis, Kostas (BioMed Central, 2007-06-20)
    Background: The annotated genomes of two closely related strains of the intracellular bacterium Wolbachia pipientis have been reported without the identifications of the putative origin of replication (ori). Identifying ...