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  • PANGAEA  (284)
  • Wiley-Blackwell  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Design and Synthesis of 5-Lipoxygenase Inhibitors (1988)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 71 (1988), S. 1156-1176 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Based on the substrate specificity for 5-lipoxygenase and the known stereochemical course of the reaction, a hypothetical model of the enzyme active site was developed and used to design 2 types of selective inhibitors of 5-lipoxygenase. Both inhibitor types used aromatic rings in place of (Z)-olefins of the substrate and were designed to mimic the nonpolar end of arachidonic acid. One inhibitor type used a carboxylic-acid interaction with the O-binding centre of the enzyme in analogy with known cyclooxygenase inhibitors, whereas a second type employed a hydroxylamine function to interact with a presumed tyrosine or cysteinyl radical predicted to be in the enzyme active site. Selective 5-lipoxygenase inhibitors were 7-(hexyloxy) naphthalene-2-acetic acid (1) and N-methyl;-N(7-propoxynaphthalene-2-ethyl)hydroxylamine (2). Structure-activity relationships for both types of inhibitors are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19880710528
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Chemie des 2-Aminospiro[indan-1,3′-pyrrolidin]-Systems (1979)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 62 (1979), S. 2860-2866 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The chemistry of the 2-aminospiro[indan-1,3′-pyrrolidine]system2-Aminospir[indan-1,3′-pyrrolidines] 1 are easily synthesized from the α-hydroxyiminoketones 6 and 19 (Schemes 2 and 3, and 6 respectively). Removal of the N-acetyl group in the intermediate 8 of the trans series induces transposition to the 3a-aminomethyl-indano[2,1-b]pyrrolidine system. The configurations of all compounds have been determined by 1H-NMR. spectroscopy.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19790620837
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Valenzisomerisierungen bei 3.4-Diaza-bicyclo[4.2.0]octadienen und -trienen (1969)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 1928-1936 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird über die Darstellung und das thermische Verhalten von Verbindungen mit dem 3.4-Diaza-bicyclooctadien- und -trien-Ringgerüst berichtet. Die Ergebnisse sprechen dafür, daß valenztautomere Gleichgewichte der Art 1 ⇌ 2 und 3 ⇌ 4 vorliegen, die Konzentration der monocyclischen Tautomeren aber so klein ist, daß diese nicht direkt nachgewiesen werden können.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19691020618
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    Paper (German National Licenses)
    Fulltext
  • 4
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    Physical/chemical properties and stable oxygen and carbon isotope records of Holocene to late Pleistocene sediments in the Gela Basin, central Mediterranean Sea (2013)
    PANGAEA
    In:  Supplement to: Kuhlmann, Jannis; Asioli, Alessandra; Strasser, Michael; Trincardi, Fabio; Huhn, Katrin (2014): Integrated Stratigraphic and Morphological Investigation of the Twin Slide Complex Offshore Southern Sicily. In: Krastel, Sebastian; Behrmann, Jan-Hinrich; Völker, David; Stipp, Michael; Berndt, Christian; Urgeles, Roger; Chaytor, Jason; Huhn, Katrin; Strasser, Michael; Harbitz, Carl Bonnevie (eds.), Submarine Mass Movements and Their Consequences, Advances in Natural and Technological Hazards Research, 37, Springer International Publishing, Cham, 583-594, https://doi.org/10.1007/978-3-319-00972-8_52
    Details
    Publication Date: 2023-03-03
    Description: The Holocene Twin Slides form the most recent of recurrent mass wasting events along the NE portion of Gela Basin within the Sicily Channel, central Mediterranean Sea. Here, we present new evidence on the morphological evolution and stratigraphic context of this coeval slide complex based on deepdrilled sediment sequences providing a 〉100 ka paleo-oceanographic record. Both Northern (NTS) and Southern Twin Slide (STS) involve two failure stages, a debris avalanche and a translational slide, but are strongly affected by distinct preconditioning factors linked to the older and buried Father Slide. Core-acoustic correlations suggest that sliding occurred along sub-horizontal weak layers reflecting abrupt physical changes in lithology or mechanical properties. Our results show further that headwall failure predominantly took place along sub-vertical normal faults, partly through reactivation of buried Father Slide headscarps.
    Keywords: Center for Marine Environmental Sciences; MARUM
    Type: Dataset
    Format: application/zip, 5 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    XRF core scanning, magnetic susceptibility and density data from the central Japan Trench (2020)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Description: The data set compiles gamma-ray wet bulk density, magnetic susceptibility (MS), and XRF core scans of the three cores GeoB16433-1 (38° 07.843'N, 144° 00.135'E, 7,525 m water depth), GeoB16431-1 (38° 00.177'N, 143° 59.981'E, 7,542 m water depth), and GeoB16444-1 (37° 42.017'N, 143° 52.377'E, 7,529 m water depth) retrieved from the central Japan Trench during Sonne Cruise SO219A in 2012. Gamma-ray wet bulk density and MS were measured by using the Geotek multi-sensor core logger at MARUM, University of Bremen. XRF core scans (elements: Al, Si, S, K, Ca, Ti, Mn, Fe, Br, Rb, Sr, Zr) were analyzed by using the Avaatech XRF core scanner at MARUM, University of Bremen.
    Keywords: Center for Marine Environmental Sciences; density; magnetic susceptibility; MARUM; XRF CS
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Pore water and solid phase data of two sediment cores obtained in the Makran area offshore pakistan during expedition M 74/3 in 2007 (2013)
    PANGAEA
    In:  Supplement to: Fischer, David; Mogollón, José M; Strasser, Michael; Pape, Thomas; Bohrmann, Gerhard; Fekete, Noemi; Spieß, Volkhard; Kasten, Sabine (2013): Subduction zone earthquake as potential trigger of submarine hydrocarbon seepage. Nature Geoscience, 6(8), 647-651, https://doi.org/10.1038/ngeo1886
    Details
    Publication Date: 2023-03-03
    Description: Methane, a potent greenhouse gas, is abundant in marine sediments**1, 2. Submarine seepage of methane-dominated hydrocarbons is heterogeneous in space and time, and mechanisms that can trigger episodic seep events are poorly understood**2, 3, 4. For example, critical gas pressures have been predicted to develop beneath impermeable sediments that bear gas hydrates, making them susceptible to mechanical failure and gas release**5, 6. Gas hydrates often occur in seismically active regions, but the role of earthquakes as triggers of hydrocarbon seepage through gas-hydrate-bearing sediments has been only superficially addressed**7, 8. Here we present geochemical analyses of sediment cores retrieved from the convergent margin off Pakistan. We find that a substantial increase in the upward flux of gas occurred within a few decades of a Mw 8.1 earthquake in 1945-the strongest earthquake reported for the Arabian Sea. Our seismic reflection data suggest that co-seismic shaking fractured gas-hydrate-bearing sediments, creating pathways for the free gas to migrate from a shallow reservoir within the gas hydrate stability zone into the water column. We conservatively estimate that 3.26×10**8 mol of methane have been discharged from the seep site since the earthquake. We therefore suggest that hydrocarbon seepage triggered by earthquakes needs to be considered in local and global carbon budgets at active continental margins.
    Keywords: Center for Marine Environmental Sciences; MARUM
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Physical/chemical properties and stable oxygen and carbon isotope records of sediment core GeoB14403-2 (2013)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Keywords: Bulimina marginata, δ13C; Bulimina marginata, δ18O; Calcium/Iron ratio; Calculated (Blum, 1997); Center for Marine Environmental Sciences; Density; Density, wet bulk; DEPTH, sediment/rock; GeoB14403-2; Globigerinoides ruber, δ13C; Globigerinoides ruber, δ18O; Magnetic susceptibility, volume; Maria S. Merian; MARUM; MeBo; MeBo (Meeresboden-Bohrgerät); MSM15/3; MSM15/3_609-2; Multi-Sensor Core Logger; Multi-Sensor Core Logger, MSF-point sensor; Section; Velocity, compressional wave; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH)
    Type: Dataset
    Format: text/tab-separated-values, 4157 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Physical/chemical properties and stable oxygen and carbon isotope records of sediment core GeoB14414-2 (2013)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Keywords: Bulimina marginata, δ13C; Bulimina marginata, δ18O; Calcium/Iron ratio; Calculated (Blum, 1997); Center for Marine Environmental Sciences; Density; Density, wet bulk; DEPTH, sediment/rock; GC; GeoB14414-2; Globigerinoides ruber, δ13C; Globigerinoides ruber, δ18O; Gravity corer; Magnetic susceptibility, volume; Maria S. Merian; MARUM; MSM15/3; MSM15/3_628-2; Multi-Sensor Core Logger; Multi-Sensor Core Logger, MSF-point sensor; Section; Velocity, compressional wave; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH)
    Type: Dataset
    Format: text/tab-separated-values, 2306 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Physical/chemical properties and stable oxygen and carbon isotope records of sediment core GeoB14403-8 (2013)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Keywords: Bulimina marginata, δ13C; Bulimina marginata, δ18O; Calcium/Iron ratio; Calculated (Blum, 1997); Center for Marine Environmental Sciences; Density; Density, wet bulk; DEPTH, sediment/rock; GeoB14403-8; Globigerinoides ruber, δ13C; Globigerinoides ruber, δ18O; Magnetic susceptibility, volume; Maria S. Merian; MARUM; MeBo; MeBo (Meeresboden-Bohrgerät); MSM15/3; MSM15/3_617-1; Multi-Sensor Core Logger; Multi-Sensor Core Logger, MSF-point sensor; Section; Velocity, compressional wave; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH)
    Type: Dataset
    Format: text/tab-separated-values, 11431 data points
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    DATA PANGAEA
  • 10
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    Physical/chemical properties and stable oxygen and carbon isotope records of sediment core GeoB14414-1 (2013)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Keywords: Bulimina marginata, δ13C; Bulimina marginata, δ18O; Calcium/Iron ratio; Calculated (Blum, 1997); Center for Marine Environmental Sciences; Density; Density, wet bulk; DEPTH, sediment/rock; GeoB14414-1; Globigerinoides ruber, δ13C; Globigerinoides ruber, δ18O; Magnetic susceptibility, volume; Maria S. Merian; MARUM; MeBo; MeBo (Meeresboden-Bohrgerät); MSM15/3; MSM15/3_628-1; Multi-Sensor Core Logger; Multi-Sensor Core Logger, MSF-point sensor; Section; Velocity, compressional wave; X-ray fluorescence core scanner (XRF) II, Bremen, (AVAATECH)
    Type: Dataset
    Format: text/tab-separated-values, 8936 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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