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  • 1995-1999  (109)
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  • 1
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    The C37 alkenone record of sea water of time series station DYNAPROC (1999)
    PANGAEA
    In:  Supplement to: Bentaleb, Ilhem; Grimalt, Joan O; Vidussi, Francesca; Marty, Jean-Claude; Martin, Valérie; Denis, Michel; Hatté, C; Fontugne, Michel R (1999): The C37 alkenone record of seawater temperature during seasonal thermocline stratification. Marine Chemistry, 64(4), 301-313, https://doi.org/10.1016/S0304-4203(98)00079-6
    Details
    Publication Date: 2024-02-01
    Description: The concentrations of suspended particulate pigments, C37-C38 alkenones, total organic carbon and nitrogen in the Ligurian Sea (northwestern Mediterranean) have been studied at 5 and 30 m depth during well defined thermocline conditions. An accurate description of the short term changes of these compounds has been achieved by means of four 36-h sampling cycles each encompassing consecutive filtration periods of 4 h. During sampling the thermocline changes were followed closely by simultaneous measurements of water column temperature, salinity and other physical parameters. The analysis of the collected samples indicates that the Haptophyte pigments and alkenones are essentially synthesized at the levels of highest primary production and therefore the C37 alkenone record reflects the seawater temperature at this depth level. The study also shows that part of these alkenones are distributed throughout the water column in association to the suspended particles. This process results in C37 alkenone distributions that, due to their high resistance to chemical and microbial degradation, record the temperature of the highest primary productivity layers even at shallow (e.g., 5 m depth) or deep (e.g., 1100 m depth) waters.
    Keywords: Biogeochemical Processes in the Oceans and Fluxes; CTD/Rosette; CTD-RO; DYNAPROC; DYNAPROC_CYCLE1; DYNAPROC_CYCLE2; DYNAPROC_CYCLE3; DYNAPROC_CYCLE4; JGOFS; Joint Global Ocean Flux Study; Le Suroît; PROOF
    Type: Dataset
    Format: application/zip, 4 datasets
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    DATA PANGAEA
  • 2
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    C37 alkenones at station DYNAPROC_CYCLE1 (1999)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; Calculated, see reference(s); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; DYNAPROC; DYNAPROC_CYCLE1; Gas chromatography; Heptatriaconta-15E,22E-dien-2-one; Heptatriaconta-8E,15E,22E-trien-2-one; JGOFS; Joint Global Ocean Flux Study; Le Suroît; Octatriaconta-16E,23E-dien-2-one; Octatriaconta-16E,23E-dien-3-one; Octatriaconta-9E,16E,23E-trien-2-one; Octatriaconta-9E,16E,23E-trien-3-one; PROOF; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 80 data points
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  • 3
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    C37 alkenones at station DYNAPROC_CYCLE2 (1999)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; Calculated, see reference(s); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; DYNAPROC; DYNAPROC_CYCLE2; Gas chromatography; Heptatriaconta-15E,22E-dien-2-one; Heptatriaconta-8E,15E,22E-trien-2-one; JGOFS; Joint Global Ocean Flux Study; Le Suroît; Octatriaconta-16E,23E-dien-2-one; Octatriaconta-16E,23E-dien-3-one; Octatriaconta-9E,16E,23E-trien-2-one; Octatriaconta-9E,16E,23E-trien-3-one; PROOF; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 136 data points
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  • 4
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    C37 alkenones at station DYNAPROC_CYCLE3 (1999)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; Calculated, see reference(s); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; DYNAPROC; DYNAPROC_CYCLE3; Gas chromatography; Heptatriaconta-15E,22E-dien-2-one; Heptatriaconta-8E,15E,22E-trien-2-one; JGOFS; Joint Global Ocean Flux Study; Le Suroît; Octatriaconta-16E,23E-dien-2-one; Octatriaconta-16E,23E-dien-3-one; Octatriaconta-9E,16E,23E-trien-2-one; Octatriaconta-9E,16E,23E-trien-3-one; PROOF; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 128 data points
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  • 5
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    C37 alkenones at station DYNAPROC_CYCLE4 (1999)
    PANGAEA
    Details
    Publication Date: 2024-02-01
    Keywords: Alkenone, unsaturation index UK'37; Biogeochemical Processes in the Oceans and Fluxes; Calculated, see reference(s); CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; DYNAPROC; DYNAPROC_CYCLE4; Gas chromatography; Heptatriaconta-15E,22E-dien-2-one; Heptatriaconta-8E,15E,22E-trien-2-one; JGOFS; Joint Global Ocean Flux Study; Le Suroît; Octatriaconta-16E,23E-dien-2-one; Octatriaconta-16E,23E-dien-3-one; Octatriaconta-9E,16E,23E-trien-2-one; Octatriaconta-9E,16E,23E-trien-3-one; PROOF; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 128 data points
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    DATA PANGAEA
  • 6
    Electronic Resource
    Electronic Resource
    Magnetic properties of epitaxial and polycrystalline Fe/Si multilayers : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4772-4774 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Fe/Si multilayers with antiferromagnetic interlayer coupling have been grown via ion-beam sputtering on both glass and single-crystal substrates. High-angle x-ray diffraction measurements show that both sets of films have narrow Fe peaks, implying a large crystallite size and crystalline iron silicide spacer layers. Low-angle x-ray diffraction measurements show that films grown on glass have rougher interfaces than those grown on single-crystal substrates. The multilayers grown on glass have a larger remanent magnetization than the multilayers grown on single-crystal substrates. The observation of magnetocrystalline anisotropy in hysteresis loops and (hkl) peaks in x-ray diffraction demonstrates that the films grown on MgO and Ge are epitaxial. The smaller remanent magnetization in Fe/Si multilayers with better layering suggests that the remanence is not an intrinsic property. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361926
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  • 7
    Electronic Resource
    Electronic Resource
    Anomalous temperature dependence of interlayer coupling in Fe/Si multilayers (abstract) : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4775-4775 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic coupling of the Fe layers in Fe/Si multilayers strongly depends on the morphology of the iron-silicide interlayer that forms during deposition. Antiferromagnetic interlayer coupling is only observed in Fe/Si multilayers with crystalline interlayers in the CsCl structure. Recently, it has been shown that single layers of Fe–Si in the CsCl structure can be grown epitaxially on Si over a range of stoichiometries. FeSi films are reported to be Kondo insulators below 50 K. We find evidence of a magnetic phase transition in antiferromagnetically coupled Fe/Si multilayers. Ms measured in a constant applied field of 50 kOe shows T3/2 behavior down to 10 K. However, M(T) at a lower constant field peaks around 50 K and decreases at lower temperature, indicating enhanced antiferromagnetic coupling or a phase transition. The remanent magnetization increases monotonically with decreasing temperature and has been explained by invoking thermally activated coupling. However, the saturation field also increases with decreasing temperature, indicating a stronger antiferromagnetic interaction. We explore the suggestion that the interlayer coupling is biquadratic in nature. Polarized neutron reflectometry has also been used to get a clearer picture of the complicated magnetic behavior of this multilayer system. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361861
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  • 8
    Electronic Resource
    Electronic Resource
    Role of epitaxy and polycrystallinity in the magnetoresistance and magnetization of La0.8Sr0.2MnO3 thin films : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5169-5171 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: La0.8Sr0.2MnO3 thin films were simultaneously deposited by pulsed laser ablation on silicon (Si) and LaAlO3 (LAO) substrates. Films on Si were polycrystalline while those on LAO were (100) epitaxial with an in-plane correlation length of ≈10 nm. The magnetization and magnetoresistance behavior of these two films were significantly different. Both films exhibit antiferromagnetic–ferromagnetic transitions—at different temperatures [180 K (LAO); 230 K (Si)]—and their magnetic moments at 10 K were significantly different (Si—0.0035 emu; LAO—0.0022 emu). However, both films showed significant high field slope in magnetization at 10 K. Significant fractions of both films remain antiferromagnetic at low temperatures and hence net susceptibilities, dependent on the direction of the applied magnetic field, are different for the epitaxial (LAO) and randomly oriented polycrystalline (Si) films. The magnetoresistance peak, corresponding to the semiconductor–metal transition is observed at 170 and 130 K for the epitaxial (LAO) and polycrystalline (Si) films, respectively. Moreover, their resistance values are two orders of magnitude different (Si—MØhms; LAO—KOhms). These properties can be interpreted in terms of the major role of grain boundaries in determining the scattering as well as possible differences in O2 stoichiometry. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361919
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  • 9
    Electronic Resource
    Electronic Resource
    Spectroscopy of Formaldehyde. 1. Ab Initio Studies on Singlet Valence and Rydberg States of Planar H2CO, with Emphasis on 1(π,π) and 1(σ,π) (1995)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 8050-8057 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100020a031
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  • 10
    Electronic Resource
    Electronic Resource
    Immunological and functional comparison between Clostridium perfringens iota toxin, C. spiroforme toxin, and anthrax toxins (1997)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 146 (1997), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Clostridium perfringens iota and C. spiroforme toxins consist of two separate proteins. One is the binding component and the other the enzymatic component. The two toxins secreted by Bacillus anthracis are composed of binary combinations of three proteins: protective antigen, lethal factor, and edema factor. As shown by Western blotting and ELISA, the binding component of anthrax toxin shares common epitopes with that of iota toxin and C. spiroforme toxin which are closely related immunologically. However, no functional complementation was observed between iota toxin and anthrax toxin components. The binding components can form toxins active on macrophages only in combination with their respective enzymatic components. Agents which prevent acidification of endosomes do not have the same effects on anthrax toxin activity as they do on iota and C. spiroforme toxins. Therefore, the mechanisms of entry into the cells are presumably different. Since the binding components of anthrax toxins and iota toxin share a conserved putative translocation domain, these binding components could have a common mode of insertion into the cell membranes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1997.tb10180.x
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