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  • 1
    Online Resource
    Online Resource
    Geochemistry of Marine Sediments (2021)
    Princeton, NJ : Princeton University Press
    Details Availability
    Keywords: Geochemistry ; Marine sediments ; SCIENCE / Earth Sciences / Oceanography
    Description / Table of Contents: Frontmatter -- Contents -- Preface -- Common Abbreviations and Symbols -- CHAPTER ONE Introduction -- CHAPTER TWO The Components of Marine Sediments -- CHAPTER THREE Isotope Geochemistry -- CHAPTER FOUR Physical Properties of Sediments -- CHAPTER FIVE An Introduction to Transport Processes in Sediments -- CHAPTER SIX Models of Sediment Diagenesis -- CHAPTER SEVEN Biogeochemical Processes in Sediments -- CHAPTER EIGHT Quantifying Carbon and Nutrient Remineralization in Sediments -- CHAPTER NINE An Introduction to the Organic Geochemistry of Marine Sediments -- CHAPTER TEN Dissolved Organic Matter in Marine Sediments -- CHAPTER ELEVEN Linking Sediment Organic Geochemistry and Sediment Diagenesis -- CHAPTER TWELVE Processes at the Sediment-Water Interface -- CHAPTER THIRTEEN Biogeochemical Processes in Pelagic (Deep-Sea) Sediments -- CHAPTER FOURTEEN Nonsteady-State Processes in Marine Sediments -- CHAPTER FIFTEEN The Controls on Organic Carbon Preservation in Marine Sediments -- CHAPTER SIXTEEN Biogeochemical Processes in Continental Margin Sediments -- CHAPTER SEVENTEEN Biogeochemical Processes in Continental Margin Sediments -- CHAPTER EIGHTEEN Linking Sediment Processes to Global Elemental Cycles: Authigenic Clay Mineral Formation and Reverse Weathering -- Appendix Some of the Field Sites Discussed in the Text -- References -- Index
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (624 p) , 33 halftones. 75 line illus. 33 tables
    Edition: 1. Auflage
    ISBN: 9780691216096
    URL: https://www.degruyter.com/isbn/9780691216096
    URL: https://www.degruyter.com/cover/covers/9780691216096.jpg
    DOI: 10.1515/9780691216096
    Language: English
    Note: Mode of access: Internet via World Wide Web. , In English
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  • 2
    Electronic Resource
    Electronic Resource
    Microbial processes affecting alanine and glutamic acid in anoxic marine sediments (1991)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 8 (1991), S. 0 
    Details
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6941.1991.tb01727.x
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  • 3
    Electronic Resource
    Electronic Resource
    Microbial processes affecting alanine and glutamic acid in anoxic marine sediments (1991)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 85 (1991), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The utilization of glutamic acid and alanine in anoxic marine sediments was studied using sediments collected from a tidal flat on the Atlantic Ocean side of Virginia's Eastern Shore (Bordens-take Bay) and a site in the mid-Chesapeake Bay. At both sites volatile fatty acids (VFAs) were produced as intermediates in the catabolism (or oxidation) of both amino acids. In contrast, methylated amines were not produced as metabolic intermediates from either amino acid. The addition of 20 mM molybdate to sediment slurries (to inhibit bacterial sulfate reduction) led to the continuous production of VFAs from both amino acids, indicating that the majority of this VFA production from these amino acids occurred by fermentative processes. Non-catabolic uptake of these amino acids (presumably into bacterial bio-mass) also appeared to be an important process in removing alanine and glutamic acid from these sediment slurries. A kinetic model used to analyze these data indicated that ? 85% of the alanine catabolism occurred by fermentative processes, with remineralization by sulfate reducing bacteria accounting for the difference. In contrast, all of the glutamic acid catabolism appeared to occur by fermentation. Calculations using data on VFA and ΣCO2 production in molybdate inhibited sediments also suggested that acetate and formate were the predominant VFAs produced by the fermentation of alanine, and perhaps glutamic acid as well. The oxidation of dissolved, free amino acids appeared to account for a significant fraction of the ammonium production in these anoxic marine sediments, although amino acids represented less than ? 2% of the carbon sources/electron donors used by sulfate reduction. These observations suggest that the general pathway of amino acid utilization in anoxic sediments involves their oxidation by fermentative bacteria to produce compounds such as VFA or H2 which are then themselves used as substrates by either sulfate reducing or methanogenic bacteria. As such, dissolved free amino acids appear to play an important role as intermediates in carbon and nitrogen cycling in these environments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1991.tb04728.x
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