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  • 1
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    PANGAEA
    In:  Supplement to: Martínez, José Ignacio (1994): Late Pleistocene palaeocenography of the Tasman Sea: Implications for the dynamics of the warm pool in the western Pacific. Palaeogeography, Palaeoclimatology, Palaeoecology, 112(1-2), 19-62, https://doi.org/10.1016/0031-0182(94)90133-3
    Publication Date: 2020-01-17
    Description: Quantitative analyses of planktonic foraminifera from 47 core-top samples (spatially distributed through the Tasman Sea) and cores RC12-113, E36-23, DSDP Sites 588, 592, 593, and ODP Site 828A (from a N-S transect), supplemented with stable-isotope analyses indicate that three planktonic foraminiferal assemblages (defined by factor analysis on core-top material) correlated with three hydrographic modes defined on the basis of, sea-surface temperatures, temperature profiles, seasonal changes in temperature and mixed-layer depth. Similar assemblages were found in down-core material along the Tasman Sea transect that, combined with semi-quantitative analyses of foraminiferal assemblages (provinces), and the coiling ratio of Globorotalia truncatulinoides, allows reconstruction of the position of the Tasman Front (or the Subtropical Divergence) during the late Brunhes Chron. The results indicate that the Tasman Front migrated from its present position at ~30°S to ~26°S during the last glacial maximum. The northward migration of the Tasman Front may indicate a reduction in volume of the equatorial warm-pool and/or an increase in the strength of cool subtropical water masses. The late Pleistocene distribution of G. truncatulinoides left-coiling from appears to be related to the formation of Subantarctic Mode Water thermostads. This relationship may explain the evolutionary origin of this species in the Southwest Pacific at 2.4 Ma simultaneously with the onset of late Pliocene glaciations. The past position of the Subtropical Convergence is reconstructed by means of coilingv directions in Neogloboquadrina pachyderma. The convergence apparently migrated slightly north of 43°S (core E36-23) during glacial stages 6, 10, and 12.
    Type: Dataset
    Format: text/tab-separated-values, 15 data points
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  • 2
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    PANGAEA
    In:  Supplement to: Cortese, Giuseppe; Dunbar, Gavin B; Carter, Lionel; Scott, George H; Bowen, M; Bostock, Helen C; Crundwell, Martin P; Hayward, Bruce W; Howard, William R; Martínez, José Ignacio; Moy, Christopher M; Neil, Helen L; Sabaa, Ashwaq T; Sturm, Arne (2013): Southwest Pacific Ocean response to a warmer world: Insights from Marine Isotope Stage 5e. Paleoceanography, 28(3), 585-598, https://doi.org/10.1002/palo.20052
    Publication Date: 2020-01-17
    Description: Paleoceanographic archives derived from 17 marine sediment cores reconstruct the response of the Southwest Pacific Ocean to the peak interglacial, Marine Isotope Stage (MIS) 5e (ca. 125 ka). Paleo-Sea Surface Temperature (SST) estimates were obtained from the Random Forest model-an ensemble decision tree tool-applied to core-top planktonic foraminiferal faunas calibrated to modern SSTs. The reconstructed geographic pattern of the SST anomaly (maximum SST between 120 and 132 ka minus mean modern SST) seems to indicate how MIS 5e conditions were generally warmer in the Southwest Pacific, especially in the western Tasman Sea where a strengthened East Australian Current (EAC) likely extended subtropical influence to ca. 45°S off Tasmania. In contrast, the eastern Tasman Sea may have had a modest cooling except around 45°S. The observed pattern resembles that developing under the present warming trend in the region. An increase in wind stress curl over the modern South Pacific is hypothesized to have spun-up the South Pacific Subtropical Gyre, with concurrent increase in subtropical flow in the western boundary currents that include the EAC. However, warmer temperatures along the Subtropical Front and Campbell Plateau to the south suggest that the relative influence of the boundary inflows to eastern New Zealand may have differed in MIS 5e, and these currents may have followed different paths compared to today.
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 3
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    PANGAEA
    In:  Supplement to: Barrows, Timothy T; Juggins, Stephen; De Deckker, Patrick; Thiede, Jörn; Martínez, José Ignacio (2000): Sea-surface temperatures of the southwest Pacific Ocean during the Last Glacial Maximum. Paleoceanography, 15(1), 95-109, https://doi.org/10.1029/1999PA900047
    Publication Date: 2020-01-17
    Description: The southwest Pacific Ocean covers a broad range of surface-water conditions ranging from warm, salty water in the subtropical East Australian Current to fresher, cold water in the Circumpolar Current. Using a new database of planktonic foraminifera assemblages (AUSMAT-F2), we demonstrate that the modern analog technique can be used to accurately reconstruct the magnitude of sea-surfacetemperature (SST) in this region. We apply this technique to data from 29 deep-sea cores along a meridional transect of the southwest Pacific Ocean to estimate the magnitude of SST cooling during the Last Glacial Maximum. We find minimal cooling in the tropics (0°-2°C), moderate cooling in the subtropical midlatitudes (2°-6°C), and maximum cooling to the southeast of New Zealand (6°-10°C). The magnitude of cooling at the sea surface from the tropics to the temperate latitudes is found to generally be less than cooling at the surface of adjacent land masses.
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 4
    Publication Date: 2020-01-17
    Type: Dataset
    Format: text/tab-separated-values, 390 data points
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  • 5
    Publication Date: 2020-01-17
    Type: Dataset
    Format: text/tab-separated-values, 62 data points
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  • 6
    ISSN: 1573-9104
    Keywords: Vicia faba ; polyphenols ; growth rate ; intestinal sugar absorption ; urinary 3-Methylhistidine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Two varieties of ‘Vicia faba L.’equina andminor, were studied. Theequina variety had a higher polyphenolic content than theminor variety. Both varieties significantly inhibited rat growth rate and ‘in vivo’ intestinal glucose transport, theequina variety being a more powerful inhibitor than theminor variety. However the raw legume fed animals showed a normal urinary excretion rate of 3-Methylhistidine.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0991
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. Two bacteriocin-producing Enterococcus faecium-like strains were independently isolated from fermented sausages. Bacteriocins were purified to homogeneity by ammonium sulfate precipitation, gel filtration, cationic exchange, hydrophobic interaction, and reverse-phase liquid chromatography. Two peptide inhibitory fractions were purified from each strain, denominated A and B for E. faecium AA13, and C and D for E. faecium G16. Fraction B was blocked for amino acid sequencing by Edman degradation, while the amino acid sequences obtained from peptides A, C, and D contained the YGNGV consensus motif in positions 5 to 9, and the ATRS sequence in positions 1 to 4. By use of PCR techniques and nucleotide sequencing, the structural gene of enterocin P was found both in E. faecium AA13 and E. faecium G16. Metabolic and genetic features of the two strains suggest that they are slightly different, they may produce more than one bacteriocin, and both produce enterocin P.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-7721
    Keywords: application development model ; application subsystem ; common functional core ; engine ; managers ; agents ; functional services ; abstract services ; applications ; information retrieval ; teleresearch in museums
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract This paper presents a model to develop novel user applications (or services) dealing with Multimedia Information retrieval through Telecom Networks, using a core application subsystem. Once the core system is available at the Information Provider sites, different applications can be easily developed on top of the services provided by the system. A building blocks architecture is proposed to provide access to storage systems, independently of their internal per site structure. The work carried out under the RAMA Project is also described.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0991
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Cell-free extracts of the wall-less slime variant ofNeurospora crassa were treated with concanavalin A (Con A); this treatment caused a massive agglutination of the particulate structures in the cell-free homogenate, although most (73%) of the chitin synthetase initially present in the cell-free extract remained in the supernatant obtained after sedimentation of the lectin-flocculated material. This chitin synthetase showed the sedimentation properties of chitosomes (unique microvesicular structures) and failed to bind [3H]Con A. A significant percentage (42%) of the chitin synthetase activity associated with the Con A-flocculated material probably corresponds to mechanically trapped chitosomes, whereas the rest of the activity in the Con A-agglutinated material might be a genuine part of the flocculated membranes and could represent a physiologically distinct form of the enzyme.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1573-0581
    Keywords: Drake Passage ; oceanic crust stratigraphy ; ridge-transform intersection ; tectonics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract New swath bathymetric, multichannel seismic and magnetic data reveal the complexity of the intersection between the extinct West Scotia Ridge (WSR) and the Shackleton Fracture Zone (SFZ), a first-order NW-SE trending high-relief ridge cutting across the Drake Passage. The SFZ is composed of shallow, ridge segments and depressions, largely parallel to the fracture zone with an `en echelon' pattern in plan view. These features are bounded by tectonic lineaments, interpreted as faults. The axial valley of the spreading center intersects the fracture zone in a complex area of deformation, where N120° E lineaments and E–W faults anastomose on both sides of the intersection. The fracture zone developed within an extensional regime, which facilitated the formation of oceanic transverse ridges parallel to the fracture zone and depressions attributed to pull-apart basins, bounded by normal and strike-slip faults. On the multichannel seismic (MCS) profiles, the igneous crust is well stratified, with numerous discontinuous high-amplitude reflectors and many irregular diffractions at the top, and a thicker layer below. The latter has sparse and weak reflectors, although it locally contains strong, dipping reflections. A bright, slightly undulating reflector observed below the spreading center axial valley at about 0.75 s (twt) depth in the igneous crust is interpreted as an indication of the relict axial magma chamber. Deep, high-amplitude subhorizontal and slightly dipping reflections are observed between 1.8 and 3.2 s (twt) below sea floor, but are preferentially located at about 2.8–3.0 s (twt) depth. Where these reflections are more continuous they may represent the Mohorovicic seismic discontinuity. More locally, short (2–3 km long), very high-amplitude reflections observed at 3.6 and 4.3 s (twt) depth below sea floor are attributed to an interlayered upper mantle transition zone. The MCS profiles also show a pattern of regularly spaced, steep-inclined reflectors, which cut across layers 2 and 3 of the oceanic crust. These reflectors are attributed to deformation under a transpressional regime that developed along the SFZ, shortly after spreading ceased at the WSR. Magnetic anomalies 5 to 5 E may be confidently identified on the flanks of the WSR. Our spreading model assumes slow rates (ca. 10–20 mm/yr), with slight asymmetries favoring the southeastern flank between 5C and 5, and the northwestern flank between 5 and extinction. The spreading rate asymmetry means that accretion was slower during formation of the steeper, shallower, southeastern flank than of the northwestern flank.
    Type of Medium: Electronic Resource
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