Now showing items 512-531 of 8202

    • Avanti: implementing a web-based "articles-on-demand" service 

      Berteaux, Susan S. (IAMSLIC, 2002)
    • Average echoes from randomly oriented random-length finite cylinders : zooplankton models 

      Stanton, Timothy K.; Chu, Dezhang; Wiebe, Peter H.; Clay, Clarence S. (Acoustical Society of America, 1993-12)
      By heuristically extending the previously developed ray solution [Stanton et al. J. Acoust. Soc. Am. 94, 3454–3462 (1993)] to predict the scattering by cylinders over all angles of incidence, approximate expressions are ...
    • Average monthly sea surface temperatures of the western North Atlantic ocean 

      Fuglister, Frederick C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1947-05)
      This paper contains twelve charts of the North Atlantic Ocean west of the 60th meridian which show the average temperature of the surface water for each month of the year. Two additional charts show respectively the ...
    • Averaging of fish target strength functions 

      Foote, Kenneth G. (Acoustical Society of America, 1980-02)
      A general model for averaging the acoustic target strength functions of fish is stated in calculable form. It accounts for the influences of the distribution of generally coupled spatial and orientation states of fish, ...
    • Avian cholera, a threat to the viability of an Arctic seabird colony? 

      Descamps, Sebastien; Jenouvrier, Stephanie; Gilchrist, H. Grant; Forbes, Mark R. (Public Library of Science, 2012-02-15)
      Evidence that infectious diseases cause wildlife population extirpation or extinction remains anecdotal and it is unclear whether the impacts of a pathogen at the individual level can scale up to population level so ...
    • Axial high topography and partial melt in the crust and mantle beneath the western Galapagos Spreading Center 

      Blacic, Tanya M.; Ito, Garrett T.; Shah, Anjana K.; Canales, J. Pablo; Lin, Jian (American Geophysical Union, 2008-12-04)
      The hot spot-influenced western Galápagos Spreading Center (GSC) has an axial topographic high that reaches heights of ∼700 m relative to seafloor depth ∼25 km from the axis. We investigate the cause of the unusual size ...
    • Axial morphology along the Southern Chile Rise 

      Blackman, Donna K.; Appelgate, B.; German, Christopher R.; Thurber, A. R.; Henig, A. S. (2012-06)
      Morphology of four spreading segments on the southern Chile Rise is described based on multi-beam bathymetric data collected along the axial zones. The distribution of axial volcanoes, the character of rift valley scarps, ...
    • Axial Seamount 

      Chadwick, William W.; Butterfield, David A.; Embley, Robert W.; Tunnicliffe, Verena; Huber, Julie A.; Nooner, Scott L.; Clague, David A. (Oceanography Society, 2010-03)
      Axial Seamount is a hotspot volcano superimposed on the Juan de Fuca Ridge (JdFR) in the Northeast Pacific Ocean. Due to its robust magma supply, it rises ~ 800 m above the rest of JdFR and has a large elongate summit ...
    • Axonal maintenance, glia, exosomes, and heat shock proteins 

      Tytell, Michael; Lasek, Raymond J.; Gainer, Harold (F1000 Research, 2016-02-22)
      Of all cellular specializations, the axon is especially distinctive because it is a narrow cylinder of specialized cytoplasm called axoplasm with a length that may be orders of magnitude greater than the diameter of the ...
    • B content and Si/C ratios from cultured diatoms (Thalassiosira pseudonana and Thalassiosira weissflogii) : relationship to seawater pH and diatom carbon acquisition 

      Mejia, Luz Maria; Isensee, Kirsten; Mendez-Vicente, Ana; Pisonero, Jorge; Shimizu, Nobumichi; Gonzalez, Cristina; Monteleone, Brian D.; Stoll, Heather M. (Elsevier, 2013-06-18)
      Despite the importance of diatoms in regulating climate and the existence of large opal-containing sediments in key air-ocean exchange areas, most geochemical proxy records are based on carbonates. Among them, Boron (B) ...
    • Bacterial communities in penile skin, male urethra, and vaginas of heterosexual couples with and without bacterial vaginosis 

      Zozaya, Marcela; Ferris, Michael J.; Siren, Julia D.; Lillis, Rebecca; Myers, Leann; Nsuami, M. Jacques; Eren, A. Murat; Brown, Jonathan; Taylor, Christopher M.; Martin, David H. (BioMed Central, 2016-04-19)
      The epidemiology of bacterial vaginosis (BV) suggests it is sexually transmissible, yet no transmissible agent has been identified. It is probable that BV-associated bacterial communities are transferred from male to female ...
    • Bacterial diversity and community composition from seasurface to subseafloor 

      Walsh, Emily A.; Kirkpatrick, John B.; Rutherford, Scott D.; Smith, David; Sogin, Mitchell L.; D'Hondt, Steven (Nature Publishing Group, 2015-10-02)
      We investigated compositional relationships between bacterial communities in the water column and those in deep-sea sediment at three environmentally distinct Pacific sites (two in the Equatorial Pacific and one in the ...
    • Bacterial diversity and successional patterns during biofilm formation on freshly exposed basalt surfaces at diffuse-flow deep-sea vents 

      Gulmann, Lara K.; Beaulieu, Stace E.; Shank, Timothy M.; Ding, Kang; Seyfried, William E.; Sievert, Stefan M. (Frontiers Media, 2015-09-10)
      Many deep-sea hydrothermal vent systems are regularly impacted by volcanic eruptions, leaving fresh basalt where abundant animal and microbial communities once thrived. After an eruption, microbial biofilms are often the ...
    • Bacterial group II introns in a deep-sea hydrothermal vent environment 

      Podar, Mircea; Mullineaux, Lauren S.; Huang, Hon-Ren; Perlman, Philip S.; Sogin, Mitchell L. (American Society for Microbiology, 2002-12)
      Group II introns are catalytic RNAs and mobile retrotransposable elements known to be present in the genomes of some nonmarine bacteria and eukaryotic organelles. Here we report the discovery of group II introns in a ...
    • A bacterial quorum-sensing precursor induces mortality in the marine coccolithophore, Emiliania huxleyi 

      Harvey, Elizabeth L.; Deering, Robert W.; Rowley, David C.; El Gamal, Abrahim; Schorn, Michelle A.; Moore, Bradley S.; Johnson, Matthew D.; Mincer, Tracy J.; Whalen, Kristen E. (Frontiers Media, 2016-02-03)
      Interactions between phytoplankton and bacteria play a central role in mediating biogeochemical cycling and food web structure in the ocean. However, deciphering the chemical drivers of these interspecies interactions ...
    • Bacterioplankton community shifts in an Arctic lake correlate with seasonal changes in organic matter source 

      Crump, Byron C.; Kling, George W.; Bahr, Michele; Hobbie, John E. (American Society for Microbiology, 2003-04)
      Seasonal shifts in bacterioplankton community composition in Toolik Lake, a tundra lake on the North Slope of Alaska, were related to shifts in the source (terrestrial versus phytoplankton) and lability of dissolved organic ...
    • Bacterivory by phototrophic picoplankton and nanoplankton in Arctic waters 

      Sanders, Robert W.; Gast, Rebecca J. (2011-11)
      Mixotrophy, the combination of phototrophy and heterotrophy within the same individual, is widespread in oceanic systems. Yet, neither the presence nor ecological impact of mixotrophs has been identified in an Arctic marine ...
    • Balancing end-to-end budgets of the Georges Bank ecosystem 

      Steele, John H.; Collie, Jeremy S.; Bisagni, James J.; Gifford, Dian J.; Fogarty, Michael J.; Link, Jason S.; Sullivan, B. K.; Sieracki, Michael E.; Beet, Andrew R.; Mountain, David G.; Durbin, Edward G.; Palka, D.; Stockhausen, W. T. (2007-05-09)
      Oceanographic regimes on the continental shelf display a great range in the time scales of physical exchange, biochemical processes and trophic transfers. The close surface-to-seabed physical coupling at intermediate scales ...
    • Baleen whales are not important as prey for killer whales Orcinus orca in high-latitude regions 

      Mehta, Amee V.; Allen, Judith M.; Constantine, Rochelle; Garrigue, Claire; Jann, Beatrice; Jenner, Curt; Marx, Marilyn K.; Matkin, Craig O.; Mattila, David K.; Minton, Gianna; Mizroch, Sally A.; Olavarría, Carlos; Robbins, Jooke; Russell, Kirsty G.; Seton, Rosemary E.; Steiger, Gretchen H.; Víkingsson, Gísli A.; Wade, Paul R.; Witteveen, Briana H.; Clapham, Phillip J. (Inter-Research, 2007-10-25)
      Certain populations of killer whales Orcinus orca feed primarily or exclusively on marine mammals. However, whether or not baleen whales represent an important prey source for killer whales is debatable. A hypothesis by ...
    • Ball release experiments on a centrifuge : misalignment between the buoyancy force and the axis of rotation 

      Riemenschneider, Ulrike; Sheremet, Vitalii A. (Cambridge University Press, 2006-09-15)
      Motivated by work on tilted convection (Sheremet, J. Fluid Mech., vol. 506, 2004, p. 217), a set of experiments is presented here using the same set-up of a tilted tank attached to a rotating centrifuge with a 2.5 m arm. ...