Now showing items 5197-5216 of 7061

  • Project LOBSTAQ : investigations on lobster (Homarus americanus) aquaculture, ecology and tertiary sewage treatment in controlled environmental systems 

    Ryther, John H.; Levine, Joseph S.; Mencher, Frederick M.; O'Neill, David J.; Plasman, Barbara; Star, Jeffrey; Thielker, Jeffrey L.; Irving, Karen; Redmann, Greg (Woods Hole Oceanographic Institution, 1976-04)
    Research was based on different aspects of incorporating Homarus Americanus cultural into the multi-trophic level marine aquaculture-wastewater treatment system of the Environmental Systems laboratory at Woods Hole. ...
  • Projected 21st century decrease in marine productivity : a multi-model analysis 

    Steinacher, M.; Joos, Fortunat; Frolicher, T. L.; Bopp, Laurent; Cadule, P.; Cocco, V.; Doney, Scott C.; Gehlen, M.; Lindsay, Keith; Moore, J. Keith; Schneider, B.; Segschneider, J. (Copernicus Publications on behalf of the European Geosciences Union, 2010-03-11)
    Changes in marine net primary productivity (PP) and export of particulate organic carbon (EP) are projected over the 21st century with four global coupled carbon cycle-climate models. These include representations of marine ...
  • Projected pH reductions by 2100 might put deep North Atlantic biodiversity at risk 

    Gehlen, M.; Seferian, R.; Jones, Daniel O. B.; Roy, T.; Roth, R.; Barry, James P.; Bopp, Laurent; Doney, Scott C.; Dunne, John P.; Heinze, Christoph; Joos, Fortunat; Orr, James C.; Resplandy, L.; Segschneider, J.; Tjiputra, Jerry (Copernicus Publications on behalf of the European Geosciences Union, 2014-12-11)
    This study aims to evaluate the potential for impacts of ocean acidification on North Atlantic deep-sea ecosystems in response to IPCC AR5 Representative Concentration Pathways (RCPs). Deep-sea biota is likely highly ...
  • Prokaryotic community structure in algal photosynthetic biofilms from extreme acidic streams in Rio Tinto (Huelva, Spain) 

    Souza-Egipsy, Virginia; Gonzalez-Toril, Elena; Zettler, Erik R.; Amaral-Zettler, Linda A.; Aguilera, Angeles; Amils, Ricardo (Spanish Society for Microbiology (SEM), 2008-12)
    Four algal photosynthetic biofilms were collected from the Rio Tinto (SW Spain) at four localities: AG, Euglena and Pinnularia biofilms; ANG, Chlorella and Pinnularia biofilms; RI, Cyanidium and Dunaliella biofilms; and ...
  • Prolonged calcium influx after termination of light-induced calcium release in invertebrate photoreceptors 

    Gomez, Maria del Pilar; Nasi, Enrico (Rockefeller University Press, 2009-08-31)
    In microvillar photoreceptors, light stimulates the phospholipase C cascade and triggers an elevation of cytosolic Ca2+ that is essential for the regulation of both visual excitation and sensory adaptation. In some organisms, ...
  • Prominent bacterial heterotrophy and sources of 13C-depleted fatty acids to the interior Canada Basin 

    Shah, Sunita R.; Griffith, David R.; Galy, Valier; McNichol, Ann P.; Eglinton, Timothy I. (Copernicus Publications on behalf of the European Geosciences Union, 2013-11-07)
    In recent decades, the Canada Basin of the Arctic Ocean has experienced rapidly decreasing summer sea ice coverage and freshening of surface waters. It is unclear how these changes translate to deeper waters, particularly ...
  • A prony algorithm for shallow water waveguide analysis 

    Diemer, Ferdinand J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-08)
    Low frequency acoustic propagation in shallow water is examined from a normal mode context. By modelling the far field pressure field as a modal sum, propagating mode characteristics of wavenumber, initial phase, attennation ...
  • Propagation of a finite-amplitude potential vorticity front along the wall of a stratified fluid 

    Stern, Melvin E.; Helfrich, Karl R. (Cambridge University Press, 2002-10-10)
    A similarity solution to the long-wave shallow-water equations is obtained for a density current (reduced gravity = g[prime prime or minute], Coriolis parameter = f) propagating alongshore (y = 0). The potential vorticity ...
  • Propagation of narrow-band-high-frequency clicks : measured and modeled transmission loss of porpoise-like clicks in porpoise habitats 

    DeRuiter, Stacy L.; Hansen, Michael; Koopman, Heather N.; Westgate, Andrew J.; Tyack, Peter L.; Madsen, Peter T. (Acoustical Society of America, 2010-01)
    Estimating the range at which harbor porpoises can detect prey items and environmental objects is integral to understanding their biosonar. Understanding the ranges at which they can use echolocation to detect and avoid ...
  • Propapation and attenuation characteristics of multilayered media 

    Koch, Stephen Patrick (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1979)
    An algorithm is proposed to numerically integrate the inhomogeneous depth-separated wave equation using a state variable technique. The solution obtained for two simple shallow water models is shown to agree well with ...
  • Properties and origins of the anisotropic eddy-induced transport in the North Atlantic 

    Kamenkovich, Igor V.; Rypina, Irina I.; Berloff, Pavel S. (American Meteorological Society, 2015-03)
    This study examines anisotropic transport properties of the eddying North Atlantic flow, using an idealized model of the double-gyre oceanic circulation and altimetry-derived velocities. The material transport by the ...
  • Properties of Red Sea coastal currents 

    Churchill, James H.; Lentz, Steven J.; Farrar, J. Thomas; Abualnaja, Yasser (Elsevier, 2014-02-14)
    Properties of coastal flows of the central Red Sea are examined using 2 years of velocity data acquired off the coast of Saudi Arabia near 22 °N. The tidal flow is found to be very weak. The strongest tidal constituent, ...
  • Propulsion in cubomedusae : mechanisms and utility 

    Colin, Sean P.; Costello, John H.; Katija, Kakani; Seymour, Jamie; Kiefer, Kristen (Public Library of Science, 2013-02-20)
    Evolutionary constraints which limit the forces produced during bell contractions of medusae affect the overall medusan morphospace such that jet propulsion is limited to only small medusae. Cubomedusae, which often possess ...
  • Propulsion optimization for ABE, an autonomous underwater vehicle (AUV) 

    Woodford, Thomas J. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1991-09)
    The oceanographic community is moving towards unmanned autonomous vehicles to gather data and monitor scientific sites. The mission duration of these vehicles is dependent primarily on the power consumption of the ...
  • Protein folding failure sets high-temperature limit on growth of phage P22 in Salmonella enterica serovar Typhimurium 

    Pope, Welkin H.; Haase-Pettingell, Cameron; King, Jonathan (American Society for Microbiology, 2004-08)
    The high-temperature limit for growth of microorganisms differs greatly depending on their species and habitat. The importance of an organism's ability to manage thermal stress is reflected in the ubiquitous distribution ...
  • Protein methylation in full length Chlamydomonas flagella 

    Sloboda, Roger D.; Howard, Louisa (2009-04-28)
    Post-translational protein modification occurs extensively in eukaryotic flagella. Here we examine protein methylation, a protein modification that has only recently been reported to occur in flagella (Schneider et al. ...
  • A protein methylation pathway in Chlamydomonas flagella is active during flagellar resorption 

    Schneider, Mark J.; Ulland, Megan; Sloboda, Roger D. (American Society for Cell Biology, 2008-08-13)
    During intraflagellar transport (IFT), the regulation of motor proteins, the loading and unloading of cargo and the turnover of flagellar proteins all occur at the flagellar tip. To begin an analysis of the protein composition ...
  • Protein phosphatase 2A plays a crucial role in Giardia lamblia differentiation 

    Lauwaet, Tineke; Davids, Barbara J.; Torres-Escobar, Ascencion; Birkeland, Shanda R.; Cipriano, Michael J.; Preheim, Sarah P.; Palm, Daniel; Svard, Staffan G.; McArthur, Andrew G.; Gillin, Frances D. (2006-12-06)
    The ability of Giardia lamblia to undergo two distinct differentiations in response to physiologic stimuli is central to its pathogenesis. The giardial cytoskeleton changes drastically during encystation and excystation. ...
  • The protein that binds to DNA base J in trypanosomatids has features of a thymidine hydroxylase 

    Yu, Zhong; Genest, Paul-Andre; ter Riet, Bas; Sweeney, Kate; DiPaolo, Courtney; Kieft, Rudo; Christodoulou, Evangelos; Perrakis, Anastassis; Simmons, Jana M.; Hausinger, Robert P.; van Luenen, Henri G. A. M.; Rigden, Daniel J.; Sabatini, Robert; Borst, Piet (Oxford University Press, 2007-03-27)
    Trypanosomatids contain an unusual DNA base J (ß-D-glucosylhydroxymethyluracil), which replaces a fraction of thymine in telomeric and other DNA repeats. To determine the function of base J, we have searched for enzymes ...
  • Proteins of the glycine decarboxylase complex in the Hydrogenosome of Trichomonas vaginalis 

    Mukherjee, Mandira; Brown, Mark T.; McArthur, Andrew G.; Johnson, Patricia J. (American Society for Microbiology, 2006-12)
    Trichomonas vaginalis is a unicellular eukaryote that lacks mitochondria and contains a specialized organelle, the hydrogenosome, involved in carbohydrate metabolism and iron-sulfur cluster assembly. We report the ...