ALBERT

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  • 1
    Publication Date: 2021-03-29
    Description: Lambert, cosmological letters, fixed stars, nebulae, island universe, teleology, teleological, enlightenment, enlightened, romanticism, romantic, hypothesis, physical-teleological, speculation, imagination, stability, solar system, cosmology, astronomy, comet, magic, alchemy, pietism, science, arts, philosophy, Newtonian. - Johann Heinrich Lamberts Cosmological Letters was published 1761 in Augsburg. Lambert tried to expose a theory of the structure of the universe as a whole, that is, a theory that was able to involucrate all sorts of observed celestial bodies, like 'fixed stars' und nebulae. Lambert tackles his task mixing two disciplines, which in principle seem to be incompatible: Newtonian physics and teleology. Lambert's speculative and imaginative way to formulate his hypotheses shows resemblances to the way of making science developed during the romantic period, disagreeing with the methods of enlightenment, movement to which Lambert is usually associated. A central aspect of this thesis is to study Lambert's figure in relation to this two traditions, with the finality to deal with the compression of his ideas in depth, in light of the transition between the enlightened vision of the world and the romantic one.
    Description: thesis
    Keywords: 520 ; TA 100 ; TA 400 ; Theoretische Grundlagen {Astronomie} ; Wissenschaftsgeschichte {Astronomie}
    Language: German
    Type: monograph , publishedVersion
    Format: 302 S.
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  • 2
    Publication Date: 2021-03-29
    Description: Mg/Ca ratios in benthic foraminiferal shells are frequently used in paleoceanographic studies to estimate past bottom water temperatures. Apart from temperature, other factors may exert additional influences on foraminiferal Mg/Ca. These include the Mg/Ca ratio of seawater, partial dissolution of shell calcite, salinity, physiological effects, and, probably of capital importance, the carbonate chemistry of seawater. In this context, the seperate effects of temperature and seawater carbonate chemistry on the magnesium incorporation into benthic foraminideral calcite are unraveled and quantified in this thesis...
    Description: thesis
    Keywords: 579.44 ; 579.44 ; 560 ; VXE 000 ; VJE 220 ; VXE 000 ; VJE 220 ; Protozoa {Paläozoologie} ; Geochemie der Fauna
    Language: English
    Type: monograph , publishedVersion
    Format: 88 S.
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  • 3
    Publication Date: 2021-03-29
    Description: Organic-walled dinoflagellate cysts, oxidation, degradation, organic matter. - Species-selective aerobic decomposition affects fossil organic-walled dinoflagellate cyst (dinocyst) records and hence dinocyst-based interpretations of primary productivity and oceanographic conditions. However, since the recognition of dinocyst species sensitive and resistant to oxic degradation (S- and R-cysts, respectively) it has become apparent that R-cysts may still serve as reliable productivity and oceanographic conditions proxies. On the other hand S-cysts provide a way to quantify aerobic degradation of organic matter (OM) and past bottom-water O2 concentrations. OM degradation plays a key role in global carbon cycling and is important for global climate change. Therefore dinocysts are a valuable tool for estimating the rate of diagenetic process. Questions concerning species-selective aerobic degradation still remain and will be adressed here. To obtain information on the rate of S-cyst decomposition, the relationship between S-cyst degradation and O2 concentrations, and the aerobic degradation of extinct dinocyst species, a natural exposure experiment has been conducted and studies of both Quaternary and pre-Quaternary material from sediment cores were executed. The exposure experiment was conducted in the natural setting of the Eastern Mediterranean. During a 15 month exposure period to oxic water masses, concentrations of S-cysts (Brigantedinium spp. and Echinidinium granulatum) decreased by 24 to 57%. However, taxa such as Nematosphaeropsis labyrinthus, Echinidinium aculeatum, Operculodinium israelianum and Impagidinium aculeatum demonstrated a slight increase in concentration, indicating resistance to aerobic degradation. These results show that even short-term exposure to oxygen may cause considerable changes in the dinocyst assemblage ...
    Description: thesis
    Keywords: 560 ; VVA 560 ; VXE 000 ; VVA 560 ; VXE 000 ; Aktuopaläontologie ; Protozoa {Paläozoologie}
    Language: English
    Type: monograph , publishedVersion
    Format: 159 S.
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  • 4
    Publication Date: 2021-03-29
    Description: Marine snow, underwater cameras, particle flux, aggregation, suspended particulate matter, particle transport. - This study focusses on the vertical distribution and transportation pathways of marine particles off NW-Africa with aid of optical methodologies. A profiling camera system and a remotely operated vehicle (ROV) was used for in-situ observations on the distribution, transport processes and sinking behaviour of marine particulate matter. Between the regional areas of investigation Cape Blanc, Dakhla and Cape Bojador significant differences could be observed with respect to distribution and transportation patterns. These differences are primarily related to the different primary production conditions between the investigation areas. Primary production is the most important factor for the abundance of particulate matter, where highest particle concentrations in the entire water column were seen off Cape Blanc. Next to primary production, water depth, currents and density gradients are factors influencing the particle distribution patterns. With respect to the prevailing transport processes, the Cape Blanc region is characterised by vertically orientated transport patterns. In addition to the continuous supply of large, relatively fast sinking particle aggregates a sinking event could be documented for the first time in-situ in the water column. These events deliver huge amounts of particulate matter from the ocean surface ...
    Description: thesis
    Keywords: 551
    Language: English
    Type: monograph , publishedVersion
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  • 5
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    Unknown
    Univ. Bremen
    Publication Date: 2021-03-29
    Description: The dissolution kinetics of gypsum and anhydrite have been measured under various conditions. For gypsum an almost linear rate equation R=ks1(1-c/ceq)n1 is valid, where R is the surface rate, n1 1 is the kinetics order, c is the total calcium concentration at the surface, and ceq the equilibrium concentration with respect to gypsum. For the determination of the entire dissolution kinetics a batch set-up was used. This batch experiment reveals a dissolution rate equation R=ks1(1-c/ceq)n1 which switch close to equilibrium to a nonlinear rate equation R=ks2(1-c/ceq)n2 with n2 4.5. The experimentally observed dissolution rates from the batch experiment could be fitted by only minor variations with a mixed kinetics model. The rotating disk experiment on anhydrite reveals a surface controlled rate equation. For anhydrite the observed experimentally dissolution rates by a batch experiment are described by R=ks(1-c/ceq})n, where ks is the surface rate constant and n 4.2 is the kinetic order. Furthermore, a method for the determination of the rate equation parameters was developed ...
    Description: thesis
    Keywords: 549 ; VJK 000 ; VHB 600 ; VGC 000 ; Experimentelle Geochemie ; Sulfate, Chromate, Molybdate und Wolframate {Mineralogie} ; Mineralchemie
    Language: German
    Type: monograph , publishedVersion
    Format: 120 S.
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  • 6
    Publication Date: 2021-03-29
    Description: Madagascar; Jurassic; Karoo; Gondwana; Breakup; Rift; Microfauna; Macrofauna; Ammonites; Indian Ocean. - The breakup of Gondwana along the former East African Orogen is widely interpreted to have lasted from the Late Palaeozoic to the Callovian. The present study indicates that the Permian-Triassic or Karoo phase of rifting was not responsible for the separation of East- and West-Gondwana, since that rift system failed in the Late Triassic. Instead the breakup of Gondwana occurred in the Late Liassic. The pre-rift phase in the Morondava Basin is represented by the Karoo deposits, and the syn-rift phase is recorded by Toarcian marine shales, locally overlain by Aalenian sandstones. A major Early Bajocian unconformity is interpreted as the breakup unconformity. The initial post-rift or drift phase is represented by the Bajocian-Bathonian carbonates, marls and sandstones of coastal plain environment and a coastal barrier/lagoon complex. During the Bathonian the siliciclastic shoreface system moved basinward. Callovian-Early Kimmeridgian shales with interbedded iron-oolites represent ...
    Description: thesis
    Keywords: 551 ; VAE 500 ; VDB 100 ; VEQ 300 ; Geotektonische Entwicklung der Erdkruste {Geologie} ; Gondwana ; Madagaskar {Geologie}
    Language: English
    Type: monograph , publishedVersion
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  • 7
    Publication Date: 2021-03-29
    Description: Turbulence, ice ridge, polynja, drag coefficient. - Polarstern (PS) cruise ARK XII led into the Laptev Sea and into the Kara Sea. Measurements of atmospheric processes within the polar surface layer were performed by a turbulence probe mounted at the bow crane of the ship.The meteorological conditions during the cruise were characterised by moderate winds and low temperature differences between the atmosphere and the underlying surface.Detailed information about the variation of meteorological parameters and of the surface fluxes were achieved as a function of the surface characteristics. The measurements are used to analyse ...
    Description: thesis
    Keywords: 551.5 ; VAQ 990 ; TYZ 400 ; TVH 500 ; Meereis {Glaziologie} ; Nordpolarmeer {Meteorologie und Klimatologie} ; Temperatur der Wasseroberfläche als meteorol. Element
    Language: German
    Type: monograph , publishedVersion
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  • 8
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    Unknown
    Univ. Bremen
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551.9 ; VJE 200 ; VJC 210 ; Geochemie Lebender Materie ; Geochemie des Meerwassers
    Language: English
    Type: monograph , publishedVersion
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  • 9
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 560 ; VYF 200 ; Pyrrophyceae {Paläobotanik}
    Language: English
    Type: monograph , publishedVersion
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  • 10
    Publication Date: 2021-03-29
    Description: thesis
    Keywords: 551 ; VAQ 990 ; Meereis {Glaziologie}
    Language: German
    Type: monograph , publishedVersion
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