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  • Chemistry  (2)
  • ANT-XIX/2; AWI; Caete_mangr; Carbon, organic, dissolved; CTD, Seabird; CTD-R; Date/Time of event; DEPTH, water; Equatorial West Atlantic; Event label; High temperature catalytic oxidation; Latitude of event; Longitude of event; Percentage; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS61; PS61/024-1; PS61/027-1; PS61/031-1; Salinity; Sample type; SPP1158; Station label; Water sample; Weddell Sea; WS  (1)
  • 2005-2009  (1)
  • 1940-1944  (2)
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  • 1
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    (Table 1) Salinity and dissolved organic carbon concentration of marine water (ANT-XIX/2) and mangrove porewater (Brazil) (2005)
    PANGAEA
    In:  Supplement to: Koch, Boris P; Witt, Matthias; Engbrodt, Ralph; Dittmar, Thorsten; Kattner, Gerhard (2005): Molecular formulae of marine and terrigenous dissolved organic matter detected by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry. Geochimica et Cosmochimica Acta, 69(13), 3299-3308, https://doi.org/10.1016/j.gca.2005.02.027
    Details
    Publikationsdatum: 2024-06-26
    Beschreibung: The chemical structure of refractory marine dissolved organic matter (DOM) is still largely unknown. Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR-MS) was used to resolve the complex mixtures of DOM and provide valuable information on elemental compositions on a molecular scale. We characterized and compared DOM from two sharply contrasting aquatic environments, algal-derived DOM from the Weddell Sea (Antarctica) and terrigenous DOM from pore water of a tropical mangrove area in northern Brazil. Several thousand molecular formulas in the mass range of 300-600 Da were identified and reproduced in element ratio plots. On the basis of molecular elemental composition and double-bond equivalents (DBE) we calculated an average composition for marine DOM. O/C ratios in the marine samples were lower (0.36 ± 0.01) than in the mangrove pore-water sample (0.42). A small proportion of chemical formulas with higher molecular mass in the marine samples were characterized by very low O/C and H/C ratios probably reflecting amphiphilic properties. The average number of unsaturations in the marine samples was surprisingly high (DBE = 9.9; mangrove pore water: DBE = 9.4) most likely due to a significant contribution of carbonyl carbon. There was no significant difference in elemental composition between surface and deep-water DOM in the Weddell Sea. Although there were some molecules with unique marine elemental composition, there was a conspicuous degree of similarity between the terrigenous and algal-derived end members. Approximately one third of the molecular formulas were present in all marine as well as in the mangrove samples. We infer that different forms of microbial degradation ultimately lead to similar structural features that are intrinsically refractory, independent of the source of the organic matter and the environmental conditions where degradation took place.
    Schlagwort(e): ANT-XIX/2; AWI; Caete_mangr; Carbon, organic, dissolved; CTD, Seabird; CTD-R; Date/Time of event; DEPTH, water; Equatorial West Atlantic; Event label; High temperature catalytic oxidation; Latitude of event; Longitude of event; Percentage; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS61; PS61/024-1; PS61/027-1; PS61/031-1; Salinity; Sample type; SPP1158; Station label; Water sample; Weddell Sea; WS
    Materialart: Dataset
    Format: text/tab-separated-values, 35 data points
    Standort Signatur Erwartet Verfügbarkeit
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    DATEN PANGAEA
  • 2
    Digitale Medien
    Digitale Medien
    Die Herstellung von Schwefelkohlenstoff (1940)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 53 (1940), S. 232-234 
    Details
    ISSN: 0044-8249
    Schlagwort(e): Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/ange.19400532104
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Über die Reaktionsweise halogenhaltiger Kohlenwasserstoffe mit Phenyl-lithium (VI. MitteilV. Mitteil.: Wittig u. Fuhrmann, B. 73, 1197 [1940].); gleichzeitig ein Beitrag zum Ablauf der Wurtz-Fittigschen Synthese (1941)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 74 (1941), S. 1474-1491 
    Details
    ISSN: 0365-9631
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.19410740819
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
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