Results 301 to 310 of about 928,096 (353)

Dissolved organic carbon on Georges Bank

Continental Shelf Research, 1996
Dissolved organic carbon (DOC) in sea water from Georges Bank was measured by a high temperature combustion/direct injection (HTC/DI) technique during the spring bloom period in April 1993. Concentrations in surface waters (72–85 μM) and deep waters (54–56 μM) were similar to DOC concentrations measured in the oligotrophic north-west Atlantic Ocean by ...
Robert F. Chen, Brian Fry, Chuck S. Hopkinson, Daniel J. Repeta, Edward T. Peltzer   +4 more
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Dissolved organic carbon in the ocean

Marine Chemistry, 1990
Abstract Soviet investigations of dissolved organic carbon (DOC) in the Peruvian upwelling area, the Bay of Bengal, the Philippine Sea and the Antarctic area are summarized, together with the methodology and a comparison with results of Sugimura and Suzuki (Mar. Chem., 24: 105–131) for the Philippine Sea.
E.A. Romankevich, S.V. Ljutsarev
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Marine anoxia impede the transformation of dissolved organic carbon released by kelp into refractory dissolved organic carbon

Marine Pollution Bulletin
The transformation of dissolved organic carbon (DOC) released by macroalgae into refractory dissolved organic carbon (RDOC) through microbial carbon pump (MCP) represents a crucial carbon sequestration process. This process mainly takes place in coastal areas, where it is likely affected by marine anoxia.
Lingyun, Zhao, Hongyan, Xing, Rongyu, Xin, Jichen, Liu, Huawei, Qin, Yuanqing, Ma, Zefeng, Tian, Mengjie, Wang, Yaoyang, Ma, Mingliang, Zhang   +9 more
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Classification of Dissolved Organic Carbon

1985
This chapter discusses the classification scheme used in this book to describe the nature of dissolved organic carbon. The classification is based on adsorption and ion-exchange chromatography and definitions of classes of organic compounds that constitute dissolved organic carbon.
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Snowball Earth prevention by dissolved organic carbon remineralization

Nature, 2007
The 'snowball Earth' hypothesis posits the occurrence of a sequence of glaciations in the Earth's history sufficiently deep that photosynthetic activity was essentially arrested. Because the time interval during which these events are believed to have occurred immediately preceded the Cambrian explosion of life, the issue as to whether such snowball ...
W Richard, Peltier, Yonggang, Liu, John W, Crowley   +2 more
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Dissolved Organic Carbon from Phytoplankton

2005
Dissolved organic carbon in the sea makes up some 700 gigatons according to conservative estimates. Even more important is the labile part, which constitutes more than 50% of newly produced DOC. The source of DOC production in the sea is photosynthetic algae.
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Dissolved Organic Carbon Losses from Tile Drained Agroecosystems

Journal of Environmental Quality, 2009
Artificial subsurface drainage is commonly used in midwestern agriculture and drainage losses of dissolved organic carbon (DOC) from such systems are an under‐quantified portion of the terrestrial carbon (C) cycle. The objectives of this study were to determine the effect of common agricultural management practices on DOC losses from subsurface tile ...
Matthew D, Ruark, Sylvie M, Brouder, Ronald F, Turco   +2 more
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Dissolved Oxygen as an Indicator of Bioavailable Dissolved Organic Carbon in Groundwater

Groundwater, 2011
Concentrations of dissolved oxygen (DO) plotted vs. dissolved organic carbon (DOC) in groundwater samples taken from a coastal plain aquifer of South Carolina (SC) showed a statistically significant hyperbolic relationship. In contrast, DO‐DOC plots of groundwater samples taken from the eastern San Joaquin Valley of California (CA)
Francis H, Chapelle, Paul M, Bradley, Peter B, McMahon, Karl, Kaiser, Ron, Benner   +4 more
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Removal of dissolved organic carbon using granular activated carbon

Water Research, 1993
Abstract Granular activated carbon (GAC) is used to reduce disinfection by-products by removing dissolved organic carbon (DOC). The optimum empty bed contact time (EBCT) for a single adsorber was determined and the influence of parallel bed operation on GAC usage rate was examined using both pilot-plant data and mass transfer models. To describe the
John C. Crittenden, Kartik Vaitheeswaran, David W. Hand, Elaine W. Howe, E.Marco Aieta, Carol H. Tate, Michael J. McGuire, Marshall K. Davis   +7 more
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Functional Groups of Dissolved Organic Carbon

1985
This chapter discusses the important functional groups of dissolved organic carbon, a basic introduction to the organic chemistry of dissolved organic carbon, and how functional groups of natural organic carbon interact with water. This chapter will be most useful for those just entering the field of organic geochemistry.
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