Now showing items 4336-4355 of 7809

    • Methanol production by a broad phylogenetic array of marine phytoplankton 

      Mincer, Tracy J.; Aicher, Athena C. (Public Library of Science, 2016-03-10)
      Methanol is a major volatile organic compound on Earth and serves as an important carbon and energy substrate for abundant methylotrophic microbes. Previous geochemical surveys coupled with predictive models suggest that ...
    • Methionine synthase interreplacement in diatom cultures and communities : implications for the persistence of B12 use by eukaryotic phytoplankton 

      Bertrand, Erin M.; Moran, Dawn M.; McIlvin, Matthew R.; Hoffman, Jeffrey M.; Allen, Andrew E.; Saito, Mak A. (Association for the Sciences of Limnology and Oceanography, 2013-07)
      Three proteins related to vitamin B12 metabolism in diatoms were quantified via selected reaction monitoring mass spectrometry: B12-dependent and B12-independent methionine synthase (MetH, MetE) and a B12 acquisition protein ...
    • A method for estimating pore water drainage from marsh soils using rainfall and well records 

      Gardner, Leonard Robert; Gaines, Emily F. (2008-03-05)
      Rainfall events during low tide exposure cause the water table in marshes to rise. If one has long time series of both rain events and water levels in wells along transects from creek bank to marsh interior, one can ...
    • A method for inverting ratio–ratio data to estimate end-member compositions in mixing problems 

      Sohn, Robert A. (2013-05-28)
      I discuss the general problem of fitting mixing models to ratio-ratio data, and derive formulae for applying non-linear Maximum Likelihood methods for parameter estimation. To estimate mixing model parameters in the ...
    • Method for reconstructing climate from fossil beetle assemblages 

      Huppert, Amit; Solow, Andrew R. (Royal Society, 2004-04-19)
      Fossil beetle remains have been used to reconstruct temperatures. One method by which these reconstructions are made--the Mutual Climatic Range method--is based on the overlap of the observed modern climatic ranges of the ...
    • A method for selectively enriching microbial DNA from contaminating vertebrate host DNA 

      Feehery, George R.; Yigit, Erbay; Oyola, Samuel O.; Langhorst, Bradley W.; Schmidt, Victor T.; Stewart, Fiona J.; Dimalanta, Eileen T.; Amaral-Zettler, Linda A.; Davis, Theodore; Quail, Michael A.; Pradhan, Sriharsa (Public Library of Science, 2013-10-28)
      DNA samples derived from vertebrate skin, bodily cavities and body fluids contain both host and microbial DNA; the latter often present as a minor component. Consequently, DNA sequencing of a microbiome sample frequently ...
    • A method for studying protistan diversity using massively parallel sequencing of V9 hypervariable regions of small-subunit ribosomal RNA genes 

      Amaral-Zettler, Linda A.; McCliment, Elizabeth A.; Ducklow, Hugh W.; Huse, Susan M. (Public Library of Science, 2009-07-27)
      Massively parallel pyrosequencing of amplicons from the V6 hypervariable regions of small-subunit (SSU) ribosomal RNA (rRNA) genes is commonly used to assess diversity and richness in bacterial and archaeal populations. ...
    • A method for the analysis of rare earth elements in natural waters by isotope dilution mass spectrometry 

      Schneider, David L.; Palmieri, Julianne M. (Woods Hole Oceanographic Institution, 1994-01)
      A method is described to measure rare-earth elements (REE) in natural water samples. An iron hydroxide precipitation followed by ion-exchange chromatography is used to concentrate and separate the REE from other matrix ...
    • Methodology for sampling and analysis of lipids in aerosols from the remote marine atmosphere 

      Peltzer, Edward T.; Alford, Jame B.; Gagosian, Robert B. (Woods Hole Oceanographic Institution, 1984-04)
      A procedure is described for the collection of remote marine aerosol samples by high-volume filtration, cascade impaction, dry fallout collection and rain. Samples were analyzed quantitatively for five classes of naturally ...
    • Methods and codes for reservoir–atmosphere C-14 age offset calculations 

      Soulet, Guillaume (2015-02)
      Reservoir age 14C offsets are invaluable tracers for past changes in carbon cycle and oceanic circulation. Reconstruction of reservoir age offsets with time is also required for calibration purposes (reconstruction of ...
    • Methods for measuring denitrification : diverse approaches to a difficult problem 

      Groffman, Peter M.; Altabet, Mark A.; Bohlke, John K.; Butterbach-Bahl, Klaus; David, Mark B.; Firestone, Mary K.; Giblin, Anne E.; Kana, Todd M.; Nielsen, Lars Peter; Voytek, Mary A. (2005-07-15)
      Denitrification, the reduction of the nitrogen (N) oxides, nitrate (NO3-) and nitrite (NO2-), to the gases nitric oxide (NO), nitrous oxide (N2O) and dinitrogen (N2), is important to primary production, water quality and ...
    • Methods for obtaining and handling marine eggs and embryos 

      Costello, Donald P.; Henley, Catherine (Marine Biological Laboratory, 1971)
      From the Preface: The Introduction to the first edition of this book (1957) (see page viii) stated that the volume was admittedly incomplete, and that new methods for obtaining, handling and studying marine eggs and ...
    • Methods for the sampling and analysis of marine aerosols : results from the 2008 GEOTRACES aerosol intercalibration experiment 

      Morton, Peter L.; Landing, William M.; Hsu, Shih-Chieh; Milne, Angela; Aguilar-Islas, Ana M.; Baker, Alexander R.; Bowie, Andrew R.; Buck, Clifton S.; Gao, Yuan; Gichuki, Susan; Hastings, Meredith G.; Hatta, Mariko; Johansen, Anne M.; Losno, Remi; Mead, Chris; Patey, Matthew D.; Swarr, Gretchen J.; Vandermark, Amanda; Zamora, Lauren M. (Association for the Sciences of Limnology and Oceanography, 2013-02)
      Atmospheric deposition of trace elements and isotopes (TEI) is an important source of trace metals to the open ocean, impacting TEI budgets and distributions, stimulating oceanic primary productivity, and influencing ...
    • Methyl mercury dynamics in a tidal wetland quantified using in situ optical measurements 

      Bergamaschi, Brian A.; Fleck, Jacob A.; Downing, Bryan D.; Boss, Emmanuel S.; Pellerin, Brian A.; Ganju, Neil K.; Schoellhamer, David H.; Byington, Amy A.; Heim, Wesley A.; Stephenson, Mark; Fujii, Roger (Association for the Sciences of Limnology and Oceanography, 2011-07)
      We assessed monomethylmercury (MeHg) dynamics in a tidal wetland over three seasons using a novel method that employs a combination of in situ optical measurements as concentration proxies. MeHg concentrations measured ...
    • Methylmercury cycling in sediments on the continental shelf of southern New England 

      Hammerschmidt, Chad R.; Fitzgerald, William F. (2005-10-26)
      Exposure of humans to monomethylmercury (MMHg) occurs primarily through consumption of marine fish, yet there is limited understanding concerning the bioaccumulation and biogeochemistry of MMHg in the biologically productive ...
    • Methylmercury in marine ecosystems : spatial patterns and processes of production, bioaccumulation, and biomagnification 

      Chen, Celia; Amirbahman, Aria; Fisher, Nicholas S.; Harding, Gareth; Lamborg, Carl H.; Nacci, Diane E.; Taylor, David (2008-09-30)
      The spatial variation of MeHg production, bioaccumulation and biomagnification in marine food webs is poorly characterized but critical to understanding the links between sources and higher trophic levels such as fish ...
    • Metrics of hurricane-ocean interaction : vertically-integrated or vertically-averaged ocean temperature? 

      Price, James F. (Copernicus Publications on behalf of the European Geosciences Union, 2009-05-05)
      The ocean thermal field is often represented in hurricane-ocean interaction by a metric termed upper Ocean Heat Content (OHC), the vertical integral of ocean temperature in excess of 26°C. High values of OHC have proven ...
    • Microarray analysis of Xenopus endoderm expressing Ptf1a 

      Bilogan, Cassandra K.; Horb, Marko E. (2012-07)
      Pancreas specific transcription factor 1a (Ptf1a), a bHLH transcription factor, has two temporally distinct functions during pancreas development; initially it is required for early specification of the entire pancreas, ...
    • Microbes and the marine phosphorus cycle 

      Dyhrman, Sonya T.; Ammerman, James W.; Van Mooy, Benjamin A. S. (Oceanography Society, 2007-06)
      Phosphorus (P) is fundamental to life, and years of study in marine systems have built a broad understanding of the marine P cycle. Various aspects of marine P biogeochemistry have been reviewed previously ...
    • Microbes in beach sands : integrating environment, ecology and public health 

      Whitman, Richard L.; Harwood, Valerie J.; Edge, Thomas A.; Nevers, Meredith B.; Byappanahalli, Muruleedhara; Vijayavel, Kannappan; Brandao, Joao; Sadowsky, Michael J.; Alm, Elizabeth Wheeler; Crowe, Allan; Ferguson, Donna; Ge, Zhongfu; Halliday, Elizabeth; Kinzelman, Julie; Kleinheinz, Greg; Przybyla-Kelly, Kasia; Staley, Christopher; Staley, Zachery; Solo-Gabriele, Helena M. (2014-05)
      Beach sand is a habitat that supports many microbes, including viruses, bacteria, fungi and protozoa (micropsammon). The apparently inhospitable conditions of beach sand environments belie the thriving communities found ...