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  • 1
    Electronic Resource
    Electronic Resource
    Oxidative coupling of mercaptide ligands in organometallic thiolate complexes (1983)
    s.l. : American Chemical Society
    Inorganic chemistry 22 (1983), S. 3960-3965 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00168a028
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis of new cyclopentadienyliron and -ruthenium benzenethiolate, thiol, and thio ether complexes (1991)
    s.l. : American Chemical Society
    Inorganic chemistry 30 (1991), S. 379-381 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00003a006
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Molecular dynamics studies of Langmuir monolayers of F(CF2)20F (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 2114-2123 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report the results of molecular dynamics simulations of Langmuir monolayers of F(CF2)20F using both a united atom model and a recently developed anisotropic united atom model of the molecular force field. A comparison of our simulation results to experimental measures of the structure of Langmuir monolayers and lamellar crystals of F(CF2)20F indicates that the anisotropic united atom model provides the better representation. Simulations using the new model at 275 K generate an azimuthally disordered rotator phase monolayer, while simulations at 150 K generate a monolayer phase with azimuthal order. The relative intensities of peaks in the in-plane structure function can be used to distinguish between the azimuthally ordered and disordered phases. Our simulations also predict, in agreement with experiment, that at large average areas per molecule the monolayer breaks up into islands that have a close-packed structure at the center but are disordered at the periphery. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470968
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  • 4
    Electronic Resource
    Electronic Resource
    Molecular dynamics studies of Langmuir monolayers of F(CF2)11COOH (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 2101-2113 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report the results of molecular dynamics simulations of close-packed Langmuir monolayers of F(CF2)11COOH using both a united atom model and a new anisotropic united atom model of the molecular force field. The stimulus for this investigation was the interpretation of the data from a recent grazing incidence x-ray diffraction study of this system [M. Goldmann et al., J. Phys. II France 4, 773 (1994)] to imply the existence of some degree of azimuthal ordering of the molecules in the close packed monolayer. With our new potential field, simulations at 275 K generate a monolayer in an azimuthally disordered rotator phase, while simulations at 150 K generate a monolayer phase with weak azimuthal order. We find that the relative intensities of peaks in the in-plane structure function can be used to distinguish between azimuthally ordered and disordered phases of the monolayer. Our simulation results are consistent with the available experimental data except for the temperature at which azimuthal ordering is detected, which difference is likely due to the inaccuracy of the intermolecular potential used in the simulations. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470967
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  • 5
    Electronic Resource
    Electronic Resource
    Liquid-liquid equilibria for three methyl alcohol-trimethyl borate-n-alkane systems (1985)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 30 (1985), S. 251-253 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je00041a004
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  • 6
    Electronic Resource
    Electronic Resource
    Polar CdSe nanocrystals: Implications for electronic structure (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 5254-5259 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report direct spectroscopic evidence for parity-forbidden electronic transitions in CdSe nanocrystals and relate it through perturbation theory to an internal electric field. This field is consistent with an estimated spontaneous polarization of Ps=−0.6 μC/cm2 for CdSe. The observed mixing of odd and even band edge hole states by this symmetry breaking internal electric field indicates that current theories of nanocrystal electronic structure, which assume inversion symmetry, require substantial revision. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.473524
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  • 7
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    HydroC pCO2 measurements during Celtic Explorer cruise CE12010 at station 44ROV12 (Gas Release Experiment) (2019)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Description: Raw data of pCO2 measurements during Celtic Explorer cruise CE12010 at station 44ROV12 (Gas Release Experiment). The gas discharge of the gas release experiment was observed in situ during a 4 hour dive with GEOMAR's remotely operated vehicle ROV Kiel 6000 equipped with HD camera/video device and a sonar system. The spread of the dissolved CO2 plume was monitored geochemically using the commercial HydroC pCO2 sensor (S/N 0412-006, Kongsberg Maritime Contros GmbH) mounted to the front porch of the ROV. The sensor was calibrated for pCO2 signals up to 3,000 µatm (accuracy ~1% of reading resolution; resolution: 〈30 µatm) and was programmed to measure in 60 s intervals, which is equal to the sensor's response time.
    Keywords: 44ROV12; carbon dioxide; Carbon dioxide, partial pressure; CE12010; CE12010_44; Celtic Explorer; Conductivity; CTD, SEA-BIRD SBE 9 plus; DATE/TIME; Density, mass density; DEPTH, water; ECO2; gas release experiment; geological storage; HydroC pCO2 sensor, CONTROS; Identification; LATITUDE; leakage; LONGITUDE; North Sea; Remote operated vehicle; ROV; Salinity; Sleipner; Sub-seabed CO2 Storage: Impact on Marine Ecosystems; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 2238 data points
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  • 8
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    Organic geochemistry of sediments from North Alex Mud Vulcano
    PANGAEA
    In:  Supplement to: Nuzzo, Marianne; Elvert, Marcus; Schmidt, Mark; Scholz, Florian; Reitz, Anja; Hinrichs, Kai-Uwe; Hensen, Christian (2012): Impact of hot fluid advection on hydrocarbon gas production and seepage in mud volcano sediments of thick Cenozoic deltas. Earth and Planetary Science Letters, 357, 421-421, https://doi.org/10.1016/j.epsl.2012.05.009
    Details
    Publication Date: 2023-05-12
    Description: Hydrocarbon seeps are ubiquitous at gas-prone Cenozoic deltas such as the Nile Deep Sea Fan (NDSF) where seepage into the bottom water has been observed at several mud volcanoes (MVs) including North Alex MV (NAMV). Here we investigated the sources of hydrocarbon gases and sedimentary organic matter together with biomarkers of microbial activity at four locations of NAMV to constrain how venting at the seafloor relates to the generation of hydrocarbon gases in deeper sediments. At the centre, high upward flux of hot (70 °C) hydrocarbon-rich fluids is indicated by an absence of biomarkers of Anaerobic Oxidation of Methane (AOM) and nearly constant methane (CH4) concentration depth-profile. The presence of lipids of incompatible thermal maturities points to mixing between early-mature petroleum and immature organic matter, indicating that shallow mud has been mobilized by the influx of deep-sourced hydrocarbon-rich fluids. Methane is enriched in the heavier isotopes, with values of d13C ~-46.6 per mil VPDB and dD ~-228 per mil VSMOW, and is associated with high amounts of heavier homologues (C2+) suggesting a co-genetic origin with the petroleum. On the contrary at the periphery, a lower but sustained CH4 flux is indicated by deeper sulphate-methane transition zones and the presence of 13C-depleted biomarkers of AOM, consistent with predominantly immature organic matter. Values of d13C-CH4 ~-60 per mil VPDB and decreased concentrations of 13C-enriched C2+ are typical of mixed microbial CH4 and biodegraded thermogenic gas from Plio-Pleistocene reservoirs of the region. The maturity of gas condensate migrated from pre-Miocene sources into Miocene reservoirs of the Western NDSF is higher than that of the gas vented at the centre of NAMV, supporting the hypothesis that it is rather released from the degradation of oil in Neogene reservoirs. Combined with the finding of hot pore water and petroleum at the centre, our results suggest that clay mineral dehydration of Neogene sediments, which takes place posterior to reservoir filling, may contribute to intense gas generation at high sedimentation rate deltas.
    Keywords: IFM-GEOMAR; Leibniz-Institut für Meereswissenschaften, Kiel
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 9
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    High resolution bathymetry of the Red Sea Rift (1 arc-second) from POSEIDON cruise POS408 and PELAGIA cruises 64PE350 and 64PE351 (2016)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Description: Gridded multibeam bathymetry from Poseidon cruise 408 and Pelagia cruises 64PE350 and 64PE351 within the Jeddah Transect Project. The raw-data were post-processed and gridded at a resolution of 30 m with QPS Fledermaus Pro. For smaller file size and better handling 11 tiles were created with GlobalMapper (5 columns, 5 lines).
    Keywords: MB; Multibeam; Red_Sea_Rift; Red Sea
    Type: Dataset
    Format: application/zip, 96.9 MBytes
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  • 10
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    Concentration and isotope ratios of gases in porewater of the North Alex Mud Volcano
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: DEPTH, sediment/rock; Ethane; Event label; GC; GC100; GC36; GC38; GC46; Gravity corer; IFM-GEOMAR; Isobutane; Latitude of event; Leibniz-Institut für Meereswissenschaften, Kiel; Longitude of event; Mediterranean Sea; Methane; MUC; MUC69; MultiCorer; n-Butane; n-Pentane; POS362/2; POS362-2_100; POS362-2_36; POS362-2_38; POS362-2_46; POS362-2_69; Poseidon; Propane; Sample comment; δ13C, ethane; δ13C, methane; δ13C, propane; δ Deuterium, methane
    Type: Dataset
    Format: text/tab-separated-values, 394 data points
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