Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean
Biogenic calcareous and siliceous sediments were drilled at ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean. We analyzed dissolved combined amino acids (DCAA) and dissolved free amino acids (DFAA) in interstitial waters in order to characterize the amino acids in dissolved organic matter. Th...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.525.1308 2023-05-15T13:42:35+02:00 Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean Hodaka Kawahata Toshio Ishizuka The Pennsylvania State University CiteSeerX Archives 1999 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.525.1308 http://www.terrapub.co.jp/journals/GJ/pdf/3404/34040247.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.525.1308 http://www.terrapub.co.jp/journals/GJ/pdf/3404/34040247.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.terrapub.co.jp/journals/GJ/pdf/3404/34040247.pdf text 1999 ftciteseerx 2016-01-08T10:19:16Z Biogenic calcareous and siliceous sediments were drilled at ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean. We analyzed dissolved combined amino acids (DCAA) and dissolved free amino acids (DFAA) in interstitial waters in order to characterize the amino acids in dissolved organic matter. The DFAA was predominant over the DCAA in interstitial waters at Sites 689 and 690, which contradicted the previous results from interstitial water and seawater studies. The DCAA in the interstitial waters probably originated from calcareous biogenic debris with less amounts of siliceous debris. Although glutamic acid constituted 41 % of the total concentration of DCAA, it accounted for only 1 % of the total concentration of DFAA due to the adsorption and/or reaction with biogenic carbonate. Ornithine, a nonprotein amino acid, is a decomposed product of arginine and made up 17 mol % of the total DFAA and. The total hydrolyzable amino acids (=DCAA + DFAA) accounted for 5 to 28 % of the dissolved organic carbon (DOC) concentra-tion, which implied that high molecular weight organic matter was a major contributor for the DOM (dis-solved organic matter) in interstitial waters. Fairly positive correlation between the dissolved manganese and the total DCAA values suggested that the redox condition plays a significant role in controlling the total DCAA content. A small decrease in the sulfate concentration in the interstitial waters from both sites suggested fairly low microbial activity by sulfate-reducing bacteria. Text Antarc* Antarctic Antarctic Ocean Unknown Antarctic Antarctic Ocean Maud Rise ENVELOPE(3.000,3.000,-66.000,-66.000) |
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ftciteseerx |
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English |
description |
Biogenic calcareous and siliceous sediments were drilled at ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean. We analyzed dissolved combined amino acids (DCAA) and dissolved free amino acids (DFAA) in interstitial waters in order to characterize the amino acids in dissolved organic matter. The DFAA was predominant over the DCAA in interstitial waters at Sites 689 and 690, which contradicted the previous results from interstitial water and seawater studies. The DCAA in the interstitial waters probably originated from calcareous biogenic debris with less amounts of siliceous debris. Although glutamic acid constituted 41 % of the total concentration of DCAA, it accounted for only 1 % of the total concentration of DFAA due to the adsorption and/or reaction with biogenic carbonate. Ornithine, a nonprotein amino acid, is a decomposed product of arginine and made up 17 mol % of the total DFAA and. The total hydrolyzable amino acids (=DCAA + DFAA) accounted for 5 to 28 % of the dissolved organic carbon (DOC) concentra-tion, which implied that high molecular weight organic matter was a major contributor for the DOM (dis-solved organic matter) in interstitial waters. Fairly positive correlation between the dissolved manganese and the total DCAA values suggested that the redox condition plays a significant role in controlling the total DCAA content. A small decrease in the sulfate concentration in the interstitial waters from both sites suggested fairly low microbial activity by sulfate-reducing bacteria. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Hodaka Kawahata Toshio Ishizuka |
spellingShingle |
Hodaka Kawahata Toshio Ishizuka Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean |
author_facet |
Hodaka Kawahata Toshio Ishizuka |
author_sort |
Hodaka Kawahata |
title |
Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean |
title_short |
Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean |
title_full |
Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean |
title_fullStr |
Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean |
title_full_unstemmed |
Amino acids in interstitial waters from ODP Sites 689 and 690 on the Maud Rise, Antarctic Ocean |
title_sort |
amino acids in interstitial waters from odp sites 689 and 690 on the maud rise, antarctic ocean |
publishDate |
1999 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.525.1308 http://www.terrapub.co.jp/journals/GJ/pdf/3404/34040247.pdf |
long_lat |
ENVELOPE(3.000,3.000,-66.000,-66.000) |
geographic |
Antarctic Antarctic Ocean Maud Rise |
geographic_facet |
Antarctic Antarctic Ocean Maud Rise |
genre |
Antarc* Antarctic Antarctic Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean |
op_source |
http://www.terrapub.co.jp/journals/GJ/pdf/3404/34040247.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.525.1308 http://www.terrapub.co.jp/journals/GJ/pdf/3404/34040247.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766169878840999936 |