Download or read book Amino Acid Analysis of Marine Sediments Hauraki Gulf New Zealand written by and published by . This book was released on 2008 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amino acid compositions, bulk organic carbon, total nitrogen, and total organic matter were measured for eight sediment samples from the Hauraki Gulf, New Zealand, in order to assess the source and fate of organic matter in a shallow marine environment. Samples were collected from near-shore and off-shore shore sites, as well as from a site receiving freshwater input from multiple rivers. A comparison of carbon, nitrogen, and amino acid compositions of samples between 1 cm depth (Uhle 2004) and 5 cm depth was used to assess changes in organic matter composition through time. Amino acid analyses in particular should be effective in deciphering organic decomposition through both the presence and abundance of amino acids. C:N values, which range from 6.5-9.3, are typical for marine sediments and indicate that the primary source for organic matter is marine despite potential terrigenous input from the surrounding environment. This interpretation is supported by carbon isotopes ( -20%0 and -22%0 for most sites) which is typical for marine-derived organic materials. C:N ratios do not appreciably vary from 1-5 cm depth, suggesting that there has not been significant depletion of organic matter in these young deposits. Furthermore, both D- and L-amino acids are present at 5 cm depth, supporting minimal organic matter decomposition. However, concentrations of amino acid decreases with depth, and the presence of D-alanine, D-aspartic acid, D-glutamic acid, glycine, and non-protein amino acids, at 5 cm depth, suggests at least a small contribution to the organic carbon source from bacteria. A decrease in [delta]15N with depth further suggests the possibility of bacterial reworking under anoxic conditions. Combined, these results support hypotheses of microbial reworking of organic matter through time, but are not clearly diagnostic of this process.

Download or read book Biogeochemical Study of Aliphatic Amines and Amino Acids in Coastal Marine Sediments written by Xu-Chen Wang and published by . This book was released on 1993 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Availability of Amino Acids in Marine Sediments written by Terry Brice McDaniel and published by . This book was released on 1989 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biogeochemistry of Dissolved Free Amino Acids in Marine Sediments written by Susan Margaret Henrichs and published by . This book was released on 1980 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dissolved free amino acids (DFAA) were measured in interstitial water samples squeezed from sediments collected in a variety of depositional environments. These sediments were further characterized by measurements of total organic carbon, total nitrogen, dissolved organic carbon, total hydrolyzable amino acids, and pore water-dissolved remineralization products.

Download or read book Amino Acids in Interstitial Waters of Marine Sediments written by Susan Margaret Henrichs and published by . This book was released on 1979 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oceanic Abstracts with Indexes written by and published by . This book was released on 1983 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Ecology of Amino Acids in the Active Surface Layer of Marine Sediments written by Christian Vye and published by . This book was released on 1982 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Zooplankton and Hydrology of Hauraki Gulf New Zealand written by John Blackburn Jillett and published by . This book was released on 1971 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Amino Acids in Interstitial Waters of Marine Sediments written by Susan Margaret Henrichs and published by . This book was released on 1981 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of Amino Acid N in Deep sea Sediments and the Relationship Between Amino Acid Levels in Three Cores from the Argentine Basin and Past Climatic Changes written by Chao-nang Cheng and published by . This book was released on 1969 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biogeochemistry of Dissolved Free Amino Acids in Marine Sediments written by and published by . This book was released on 1908 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Financial support was provided by the Woods Hole Oceanographic Institution Education Office, the Paul M. Fye Fellowship, ONR Contract N00014-79-C-0071, and NSF Grant No. OCE 79-08665. Travel funds to Peru were provided by NSF Grant No. OCE 77-26180.

Download or read book Perspectives in Amino Acid and Protein Geochemistry written by Glenn A. Goodfriend and published by Oxford University Press, USA. This book was released on 2000 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amino Acids are not only the essential constituents of all living organisms, they also provide vital clues about life in the past. This book of contributed papers updates the science of amino acid geochemistry and replaces a classic but now outdated work, The Biogeochemistry of Amino Acids (out of print). The new book will have a wider focus than its predecessor, covering preservation of ancient proteins and amino acids, diagenesis of proteins and amino acids through geologic time and on short time scales (relevant to the preservation of museum materials), stable isotope geochemistry of proteins and amino acids, amino acid racemization, the origin of life, the stability of amino acids at hgh temperatures and pressures, and extraterrestrial amino acids. The primary audience for this book will be academics and graduate students in geochemistry, organic chemistry, archaeology, geochronology, and stratigraphy, although it will also be of interest to workers in forensic science.

Download or read book Predicting the Distribution of Acid Volatile Sulfide in Marine Sediment from Colour Analysis of Sediment Profile Images written by Stanley Wilson and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Author supplied keywords: Sediment profile imagery; Organic enrichment; Coastal sediment; Marine farming; Acid volatile sulphide; Image analysis; Hauraki Gulf.

Download or read book Ecology Abstracts written by and published by . This book was released on 1991 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biogeochemistry of Amino Acids written by Peter Edgar Hare and published by John Wiley & Sons. This book was released on 1980-05-13 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents papers read at a conference held at Airlie House, Warenton, Virginia, October 29 to November 1, 1978 on ``Advances in the Biogeochemistry of Amino Acids.'' Offers the concepts, techniques, and results of most of the active participants in this area of research. The papers are representative of the major areas in which amino acid biogeochemistry is being developed, but they also point to new areas of future research. Provides numerous instances of amino acid biogeochemistry as an interdisciplinary science by including the thoughts of scientists from backgrounds as diverse as geology, archeology, paleontology, and geochemistry.

Download or read book Nitrogen Isotopes of Amino Acids in Marine Sediment a Burgeoning Tool to Assess Organic Matter Quality and Changes in Supplied Nitrate Delta 15N written by Wilson Sauthoff and published by . This book was released on 2016 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compound-specific nitrogen (N) isotopic analysis (delta15N) of amino acids (AA), or CSI-AA, is a novel approach to understand N cycling. We expand upon initial observations at a productive, hypoxic margin to provide insight into source and transformation of sedimentary organic nitrogen from varied depositional conditions in a complex N cycling zone, the eastern tropical Pacific. delta15NAA patterns are generally well preserved, matching original mixed plankton inputs with some evidence for microbial degradation. There is appreciable delta15N offset between total N (bulk) and total AA N, where AA N is enriched. Source AA, previously understood to record changing baseline delta15N, are fundamentally different in marine sediments. We use modeling to rigorously test whether the total AA delta15N instead tracks changing baseline delta 15N. Lastly we employ this new understanding of delta15N AA in sediments to compare with published whole sediment (delta 15Nbulk) records, demonstrating the utility and wealth of information provided by CSI-AA.

Download or read book Studies of the Processes Affecting Dissolved Free Amino Acids in Anoxic Marine Sediments written by David Jay Burdige and published by . This book was released on 1986 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: