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  • Polymer and Materials Science  (4)
  • Inorganic Chemistry  (2)
  • AWI_PerDyn; International Polar Year (2007-2008); IPY; Permafrost Research (Periglacial Dynamics) @ AWI  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Über Größe und Ladung des Polyelektrolytsystems Poly-N-Vinylpyrrolidon/Blankophor BAAus der Dissertation von Frank Preußer, Technische Universität München. II. Die Änderung des Reibungskoeffizienten mit der Ladungsdichte und der Salzkonzentration (1974)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 37 (1974), S. 199-214 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: In part I of this series the results of sedimentation velocity experiments with the polyelectrolyte Polyvinylpyrrolidone-Blancophor are described. The combination of the Svedberg formula and an equation of Tiselius describing the charge- and salt-effects gives the possibility to describe the change of the frictional coefficient as a function of charge and screening quantitatively. The resulting frictional coefficients resp. the dimensions of the coil of this polyelectrolyte change in a wide range with the charge density and the counterion concentration.
    Notes: Im Teil I dieser Publikationsreihe wurden die Ergebnisse aus den Sedimentationsgeschwindigkeitsexperimenten an dem Polyelektrolyten Polyvinylpyrrolidon-Blankophor beschrieben. Wird die Svedberg-Gleichung mit einer die Ladungs- und Salzeffekte erfassenden Gleichung von Tiselius kombiniert, so läßt sich die änderung des Reibungskoeffizienten bei Variation der Ladung und Abschirmung quantitativ efassen. Es ergibt sich eine starke Abhängigkeit des Reibungskoeffizienten bzw. der Knäueldimensionen dieses Polyelektrolyten von der Ladungsdichte und der Fremdsalzkonzentration.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1974.050370118
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  • 2
    Electronic Resource
    Electronic Resource
    Über Größe und Ladung des Polyelektrolytsystems Poly-N-Vinylpyrrolidon/Blankophor BAAus der Dissertation von Frank Preußer, Technische Universität München. I. Qualitative Beschreibung und Deutung der Sedimentationskoeffizienten in Abhängigkeit von der Ladungsdichte und der Fremdsalzkonzentration (1974)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 37 (1974), S. 187-197 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The anion of the fluorescent dye Blancophor adsorbs onto the polymer polyvinylpyrrolidone in aqueous solution resulting in a polyelectrolyte whose charge and counter-ion concentration can be varied easily. The results of sedimentation-, diffusion- and density-measurements are referred. The effects basing on different origins are summarized and described. The dependence of the measured sedimentation coefficients from the charge-density and the concentration of low-molecular salts is qualitatively interpreted on the base of these influences.
    Notes: Das Anion des Fluoreszenzfarbstoffes Blankophor adsorbiert in wäßriger Lösung an Polyvinylpyrrolidon und führt zu einem Polyelektrolyten, dessen Ladung und Gegenionenkonzentration sich bequem variieren läßt. Die Ergebnisse aus Sedimentations-, Diffusions-und Dichtemessungen werden dargestellt. Die auf verschiedene Ursachen zurückzuführenden Einflüsse auf den Sedimentationskoeffizienten werden zusammengestellt und beschrieben. Die Abhängigkeit der gemessenen Sedimentationskoeffizienten von der Ladungsdichte und der Fremdsalzkonzentration wird auf der Basis dieser Einflüsse qualitativ gedeutet.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1974.050370117
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  • 3
    Electronic Resource
    Electronic Resource
    Technology-transfer analysis of the materials research program “Matfo”The project management organization “New Materials and Chemical Technologies (NMT)”, Forschungszentrum Jülich GmbH, gratefully acknowledges the support of the Bundesministerium für Bildung, Wissenschaft, Forschung and Technologie (BMBF). (1996)
    Weinheim : Wiley-Blackwell
    Advanced Materials 8 (1996), S. 713-717 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The commercial success of the German Federal Ministry's materials research program “Mafto” (1985-1994) was recently evaluated to determine the effectiveness of the direct-funding model in supporting innovative industrial research. Based on the results of a questionnaire, where a 97% return rate was achieved, it was found that the results obtained in 27% of the projects have already been commercialized to some degree, for 26% of the projects a commercialization of the results is planned but has not yet taken place, and for 54% of the projects no commercialization is planned. This study included only projects where at least four years had elapsed since project completion. The reasons why scientifically and technically successfully projects were not commercialized were also surveyed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19960080902
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  • 4
    Electronic Resource
    Electronic Resource
    Wärmeübergang und maximale Wärmestromdichte beim Behältersieden binärer und ternärer FlüssigkeitsgemischeVortrag auf dem Jahrestreffen der Verfahrens-Ingenieure, 27. bis 29. September 1978 in Aachen (1979)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 51 (1979), S. 37-37 
    Details
    ISSN: 0009-286X
    Keywords: Verdampfen ; Gemische ; Wärmeübergang ; maximale ; Wärmestromdichte ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330510112
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  • 5
    Electronic Resource
    Electronic Resource
    Ueber Amidoderivate von Chinon und Hydrochinon (1886)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 19 (1886), S. 2247-2249 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.188601902137
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  • 6
    Electronic Resource
    Electronic Resource
    Ueber die Constitution des Dinitrohydrochinons und über die Bildung der Nitranilsäure (1887)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 20 (1887), S. 797-799 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.188702001181
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  • 7
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    Radiocarbon ages, dose rates, water isotopic composition and hydrochemistry of samples from Komakuk Beach and Herschel Island (2012)
    PANGAEA
    In:  Supplement to: Fritz, Michael; Wetterich, Sebastian; Schirrmeister, Lutz; Meyer, Hanno; Lantuit, Hugues; Preusser, Frank; Pollard, Wayne H (2012): Eastern Beringia and beyond: Late Wisconsinan and Holocene landscape dynamics along the Yukon Coastal Plain, Canada. Palaeogeography, Palaeoclimatology, Palaeoecology, 319-320, 28-45, https://doi.org/10.1016/j.palaeo.2011.12.015
    Details
    Publication Date: 2023-12-13
    Description: Terrestrial permafrost archives along the Yukon Coastal Plain (northwest Canada) have recorded landscape development and environmental change since the Late Wisconsinan at the interface of unglaciated Beringia (i.e. Komakuk Beach) and the northwestern limit of the Laurentide Ice Sheet (i.e. Herschel Island). The objective of this paper is to compare the late glacial and Holocene landscape development on both sides of the former ice margin based on permafrost sequences and ground ice. Analyses at these sites involved a multi-proxy approach including: sedimentology, cryostratigraphy, palaeoecology of ostracods, stable water isotopes in ground ice, hydrochemistry, and AMS radiocarbon and infrared stimulated luminescence (IRSL) dating. AMS and IRSL age determinations yielded full glacial ages at Komakuk Beach that is the northeastern limit of ice-free Beringia. Herschel Island to the east marks the Late Wisconsinan limit of the northwest Laurentide Ice Sheet and is composed of ice-thrust sediments containing plant detritus as young as 16.2 cal ka BP that might provide a maximum age on ice arrival. Late Wisconsinan ice wedges with sediment-rich fillings on Herschel Island are depleted in heavy oxygen isotopes (mean d18O of -29.1 per mil); this, together with low d-excess values, indicates colder-than-modern winter temperatures and probably reduced snow depths. Grain-size distribution and fossil ostracod assemblages indicate that deglaciation of the Herschel Island ice-thrust moraine was accompanied by alluvial, proluvial, and eolian sedimentation on the adjacent unglaciated Yukon Coastal Plain until ~11 cal ka BP during a period of low glacio-eustatic sea level. The late glacial-Holocene transition was marked by higher-than-modern summer temperatures leading to permafrost degradation that began no later than 11.2 cal ka BP and caused a regional thaw unconformity. Cryostructures and ice wedges were truncated while organic matter was incorporated and soluble ions were leached in the thaw zone. Thermokarst activity led to the formation of ice-wedge casts and deposition of thermokarst lake sediments. These were subsequently covered by rapidly accumulating peat during the early Holocene Thermal Maximum. A rising permafrost table, reduced peat accumulation, and extensive ice-wedge growth resulted from climate cooling starting in the middle Holocene until the late 20th century. The reconstruction of palaeolandscape dynamics on the Yukon Coastal Plain and the eastern Beringian edge contributes to unraveling the linkages between ice sheet, ocean, and permafrost that have existed since the Late Wisconsinan.
    Keywords: AWI_PerDyn; International Polar Year (2007-2008); IPY; Permafrost Research (Periglacial Dynamics) @ AWI
    Type: Dataset
    Format: application/zip, 4 datasets
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    DATA PANGAEA
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