gase – Übersetzung – Keybot-Wörterbuch

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Keybot 6 Ergebnisse  www.marum.de
  Brotzeit für Bakterien:...  
Ausschlaggebend für die Studie waren die Fragen, was mit Schwefelverbindungen passiert, wenn die Algenzellen absterben und wie groß die Menge an organischem Schwefel im Meer überhaupt ist. Was bleibt übrig, wie schnell wird es abgebaut? Werden beim Abbau klimarelevante Gase freigesetzt?
Crucial questions for the study were, what happens to the sulfur compounds when the algae cells die, and what is the actual amount of organic sulfur in the ocean. How much remains and how fast is it degraded? Are climate-relevant gases released during degradation processes?
  Gas-Isotopenmassenspekt...  
Die Analytik umfasst die Bestimmung an Einzelkomponenten nach Trennung im Gas- oder Flüssigkeitschromatographen (Gase, Biomarker, Lipide, volatile Fettsäuren) und die Vermessung der Gesamtorganik an Sedimentproben und Zellmaterial.
The laboratory of the molecular isotope biogeochemistry working group houses two mass spectrometers for measuring stable H, C, N isotopes on organic compounds. The latter include gases, biomarkers, lipids and volatile fatty acids and are isolated using gas- and liquid chromatography. Samples include sediment samples and cell material.
  Allgemeine Geologie - M...  
Methan kommt in marinen Ablagerungen der Kontinentalhänge in großen Mengen als freies Gas oder gelöst im Wasser der Porenräume vor. Bei genügend hohem Druck und kalten Umgebungstemperaturen bilden Methan und andere Gase eisähnliche, feste Substanzen, die als Gashydrate bekannt sind.
Large amounts of methane either as free gas or dissolved in porewater are present in sediment deposits along continental margins. Under condition of high pressure and cold temperature, methane and other gases form ice-like gas hydrates. A focus of our research is on understanding the formation, structure and dynamics of gas hydrates in natural systems and their influence on the marine environment. Like groundwater springs on land, fluids and gas circulate through the upper sediment sequences of the seafloor and escape at so-called cold vents or cold seeps. Study objects are precipitates (carbonates, gas hydrates, and barites) and chemoautotrophic communities which are present at those seeps when methane is oxidized in the sediments.
  AG Hinrichs - Aktuelles  
März 2015: Mofette-Böden weisen durch den Austritt vulkanischer Gase ungewöhnlich hohe CO2-Konzentrationen auf. Felix Beulig und Kollegen aus Hinrichs Lab untersuchten die Auswirkungen der extremen CO2-Konzentrationen auf die mikrobielle Gemeinschaft und den Kohlenstoffkreislauf, u.a. die Aufnahme von CO2 in Biomasse, an einem Mofette-Standort im Vergleich zu einem unbeeinflussten Referenzboden.
March 2015: Mofette soils are characterized by elevated CO2 flow due to volcanic gas upstreams. Felix Beulig in collaboration with colleagues from the Hinrichs Lab studied the influence of extremely high CO2 concentrations in a mofette soil on microbial communities and carbon flow, e.g. the uptake of CO2 into biomass, compared to unaffected reference soil.
  AG Hinrichs - Die tiefe...  
Acetogenese könnte Gase, die durch Wechselwirkungen zwischen Wasser und Gestein entstehen, in organische Substrate überführen, die von einer Vielzahl von Mikroorganismen genutzt werden können (Pederson, 2000).
We develop new methods for stable carbon isotope analysis of organic metabolites that we find dissolved in pore-waters (Heuer et al., 2006) (see also "metabolites"). Our main interest is directed towards volatile fatty acids because they are central intermediates in the degradation of organic matter and important substrates for microorganisms. Acetate is particularly interesting since it is not only formed by fermentation and thermal alteration of organic matter during sediment burial (Wellsbury et al., 1997) but also by reduction of carbon dioxide with hydrogen (acetogenesis). Thus, it could potentially transform geofuels, i.e. gases that are generated by mineral-water interactions, into an organic substrate that can be used by a broad range of microorganisms (Pederson, 2000).
  AG Hinrichs - Die tiefe...  
"Geotreibstoffe", d.h. energiereiche Gase, die durch Wechslewirkungen zwischen Mineralien und Meerwasser gebildet werden oder aus der tieferen Erdkruste aufsteigen, könnten in der Abwesenheit von Sonnenlicht und Photosynthese alternative Energiequellen sein.
The discovery of the deep biosphere gives rise to new, fundamental questions about the evolution and distribution of life. Considering the broad range of temperatures and high pressures in the subsurface and the lack of fresh organic matter as a source of energy and nutrients, the existence and survival of an extensive deep biosphere are remarkable. Geofuels, i.e. gases that are generated by mineral-water interactions or derived from the deep crust, might be an alternative energy source in the absence of light and photosynthesis. So far, only little is known about the individual inhabitants of the deep biosphere, about their genetic diversity, metabolic capabilities and survival strategies. Moreover, the relationships between deep subsurface ecosystems and the surface world remain to be explored.