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  • 1
    Call number: AWI G6-93-0274b ; AWI G6-93-0274a
    Type of Medium: Monograph available for loan
    Pages: 179 S. : 30 cm
    Branch Library: AWI Library
    Branch Library: AWI Library
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 19 (1972), S. 0 
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Humic acid dissolved in artificial seawater influenced the morphology, internal structure, and composition of aragonite when precipitation was induced with dilute Na2CO3 solution. At sodium humate concentrations of around 20 mg/1, numerous brownish spherical aragonite bodies developed within one day at 25 °C. The spheres ranged in size from 10–100 microns and resembled natural marine ooids. They formed with gentle agitation of the solution as well as with no water movement at all. The typical structure of natural ooids consisting of concentric alternating aragonite and organic laminae was experimentally duplicated as layers of aragonite crystals alternating with humate membranes; however, in contrast to natural ooids, the individual aragonite crystals here were oriented radially with their c-axes. The aragonite of the spheres contained about 20 wt. % more strontium than the aragonite precipitated experimentally without the addition of sodium humate, and organic carbon content of the spherical aragonite was about 7% by weight.
    Type of Medium: Electronic Resource
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  • 3
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    Springer
    In:  In: Hydrocarbons, Oils and Lipids: Diversity, Origin, Chemistry and Fate. , ed. by Wilkes, H. Handbook of Hydrocarbon and Lipid Microbiology . Springer, Cham, pp. 1-21.
    Publication Date: 2019-03-20
    Type: Book chapter , NonPeerReviewed
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  • 4
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    IFM-GEOMAR
    In:  In: IFM-GEOMAR [Annual] Report 2002-2004 From the Seafloor to the Atmosphere - Marine Sciences at IFM-GEOMAR Kiel -. , ed. by Villwock, A. IFM-GEOMAR, Kiel, Germany, pp. 35-38.
    Publication Date: 2019-03-08
    Type: Book chapter , NonPeerReviewed
    Format: text
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  • 5
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    Institut für Meereskunde an der Universität Kiel
    In:  Institut für Meereskunde an der Universität Kiel, Kiel, Germany, 16 pp.
    Publication Date: 2019-04-18
    Type: Report , NonPeerReviewed
    Format: text
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  • 6
    Publication Date: 2019-05-06
    Description: Transects of the submersible Alvin across rock outcrops in the Oregon subduction zone have furnished information on the structural and stratigraphic framework of this accretionary complex. Communities of clams and tube worms, and authigenic carbonate mineral precipitates, are associated with venting sites of cool fluids located on a fault-bend anticline at a water depth of 2036 meters. The distribution of animals and carbonates suggests up-dip migration of fluids from both shallow and deep sources along permeable strata or fault zones within these clastic deposits. Methane is enriched in the water column over one vent site, and carbonate minerals and animal tissues are highly enriched in carbon-12. The animals use methane as an energy and food source in symbiosis with microorganisms. Oxidized methane is also the carbon source for the authigenic carbonates that cement the sediments of the accretionary complex. The animal communities and carbonates observed in the Oregon subduction zone occur in strata as old as 2.0 million years and provide criteria for identifying other localities where modern and ancient accreted deposits have vented methane, hydrocarbons, and other nutrient-bearing fluids.
    Type: Article , PeerReviewed
    Format: text
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillan Magazines Ltd
    Nature 387 (1997), S. 31-32 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In this communication, we report on brines from the Discovery Basin in the eastern Mediterranean which have the highest salin- ity ever found in the marine environment They were formed by the dissolution of bischofite (MgCl2.6H2O) and filled the basin during the past 2,000 years. The ...
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 333 (1988), S. 17-18 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ORGANIC matter exists in many forms in the oceans - as detritus and microbes, which can be suspended or sinking, and also as dissolved organic matter. The way these pools interact is influenced by, and influences, the distribution of nutrients and oxygen dissolved in the water column. One point of ...
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 320 (1986), S. 107-108 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ENVIRONMENTAL conditions of growth, particularly ocean temperature, are faith-fully recorded by the coccolithophorids - widely distributed marine phytoplankton. The record lies in the relative abundance of long-chain alkenones - complex orga-nic molecules of the lipid bilayer which control the ...
    Type of Medium: Electronic Resource
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  • 10
    Publication Date: 2017-08-22
    Description: The methane concentration and pCO2 in surface waters and the overlying marine air were continuously surveyed along the pathway of the Kuroshio, from the eastern coast of Honshu to Taiwan, and then across the eastern part of the East China and South China Seas in September of 1994. Off Honshu, the CH4 content was controlled by the confluence of the relatively CH4-poor waters of the Kuroshio and the Oyashio and the CH4-rich Tsugaru Warm Current, the latter carrying water into the Pacific Ocean with a methane content more than twice the equilibrium value with the atmospheric CH4 partial pressure. Along the Kuroshio, the surface water was supersaturated in methane with respect to the atmosphere by 10–15% and appears considerably enriched relative to open Pacific surface waters at same latitudes. The northeastern part of the South China Sea, part of the deep basin of this marginal sea, showed CH4 concentrations similar to those found in open-ocean waters. In contrast, highly variable oversaturations up to 700% were observed along the northwestern coast of Borneo, most probably related to known seepage from oil and gas deposits in this area. The pCO2 of surface water was higher than the atmospheric pCO2 throughout the area surveyed. However, the ΔpCO2 of the surface waters varied from close to 0 to more than 60 μatm. The observed oversaturation in areas influenced by the Kuroshio confirm that, during a short period in late summer, the surface waters of this current between Taiwan and Japan act as a moderate source for atmospheric CO2.
    Type: Article , PeerReviewed
    Format: text
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