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  • 550 - Earth sciences  (9)
  • Chemistry  (5)
  • 74.20  (1)
  • 2010-2014  (9)
  • 1995-1999  (4)
  • 1955-1959  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Micro-Raman scattering investigations on borocarbides (1996)
    Springer
    Journal of low temperature physics 105 (1996), S. 1629-1634 
    Details
    ISSN: 1573-7357
    Keywords: 63.20 K ; 74.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Single crystalline specimens of RNi2B2C (R=Y, La) and Y(Ni.7Co.3)2B2C (non-superconducting reference) have been isolated from polycrystalline samples and successfully orientated. All four observable Raman peaks could be measured and unambiguously be attributed to vibrations of B and Ni atoms. Most important, we can show that a broadening of the B-A1g mode also occurs in non-superconducting reference samples and should therefore not be taken as an evidence for a dominant role of the B-A1g mode in the pairing interaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00753933
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Spektroskopische Untersuchungen zur Acidität von Dithiophosphorsäure-O,O′-estern in unpolaren, aprotischen Lösungsmitteln (1995)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 337 (1995), S. 245-249 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Spectroscopic Investigations on the Acidity of O,O′-Dithiophosphoric Acid Esters in Nonpolar Aprotic Solvents
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19953370153
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Morphologie der Gefriertrocknung (1957)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 69 (1957), S. 197-198 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Gefriertrocknung von Lösungen fadenförmiger und kugelförmiger Hochpolymerer, niedermolekularer Zucker und sogar anorganischer Salze wurden Gerüststrukturen von teilweise bemerkenswerter Festigkeit erhalten. Das makroskopische Bild der Trockensubstanzen wird bei allen Stoffgruppen durch die Textur des ausfrierenden Lösungsmittels bestimmt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19570690603
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  • 4
    Electronic Resource
    Electronic Resource
    Mikrowägung mit Quarzen in der Prozeß- und Umweltanalytik (1995)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 67 (1995), S. 1172-1173 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.3306709126
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  • 5
    Electronic Resource
    Electronic Resource
    Resonante Sensoren zum Nachweis von Tensiden und Organika in Flüssigkeiten (1997)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 69 (1997), S. 1312-1312 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.3306909150
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  • 6
    Electronic Resource
    Electronic Resource
    Zur problematik der ermittlung von viskositätszahlen aus strukturviskosen lösungen. (Viskositätsmessungen an nativen dextranen) (1956)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 18 (1956), S. 422-430 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Solutions of extremely high molecular dextrans show such pronounced deviations from Newtonian behaviour, even in the range of low concentrations, that the determination of shear-independent intrinsic viscosities in the usual manner does not succeed. The rheological behaviour of such dextran solutions is described and methods of evaluation are discussed, which permit the elimination of the effect of rate of shear upon the intrinsic viscosity. Effects of thixotropy are mentioned.
    Notes: Lösungen sehr hochmolekularer Dextrane zeigen noch im Bereich kleiner Konzentrationen so starke Abweichungen vom Newton schen Verhalten, daß die Ermittlung schubspannungsunabhängiger Viskositätszahlen auf dem üblichen Wege nicht mehr gelingt. Das Fließverhalten solcher Dextranlösungen wird beschrieben, und es werden Auswertungsverfahren diskutiert, die bei derartigen Systemen den Einfluß der Scherbeanspruchung auf die Viskositätszahl zu eliminieren gestatten. Auf Thixotropieerscheinungen bei solchen Lösungen wird hingewiesen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1956.020180137
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  • 7
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    Airborne Eddy Covariance Measurements of Northern Wetland Methane Emissions (2012)
    In:  IPY 2012 Conference 'From Knowledge to Action' (Montréal 2012)
    Details
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/conferenceObject
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  • 8
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    Airborne Measurements of Methane Fluxes over Mid-Latitude and Sub-Arctic Wetlands (2012)
    In:  Geophysical Research Abstracts Vol. 14, EGU2012-2382, 2012
    Details
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
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  • 9
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    Quantification of methane emission rates from coal mine ventilation shafts using airborne remote sensing data (2013)
    In:  Atmospheric Measurement Techniques
    Details
    Publication Date: 2020-02-12
    Description: The quantification of emissions of the greenhouse gas methane is essential for attributing the roles of anthropogenic activity and natural phenomena in global climate change. Our current measurement systems and networks, whilst having improved during the last decades, are deficient in many respects. For example, the emissions from localised and point sources such as landfills or fossil fuel exploration sites are not readily assessed. A tool developed to better understand point sources of the greenhouse gases carbon dioxide and methane is the optical remote sensing instrument MAMAP (Methane airborne MAPper), operated from aircraft. After a recent instrument modification, retrievals of the column-averaged dry air mole fractions for methane XCH4 (or for carbon dioxide XCO2) derived from MAMAP data have a precision of about 0.4% or better and thus can be used to infer emission rate estimates using an optimal estimation inverse Gaussian plume model or a simple integral approach. CH4 emissions from two coal mine ventilation shafts in western Germany surveyed during the AIRMETH 2011 measurement campaign are used as examples to demonstrate and assess the value of MAMAP data for quantifying CH4 from point sources. While the knowledge of the wind is an important input parameter in the retrieval of emissions from point sources and is generally extracted from models, additional information from a turbulence probe operated on-board the same aircraft was utilised to enhance the quality of the emission estimates. Although flight patterns were optimised for remote sensing measurements, data from an in situ analyser for CH4 were found to be in good agreement with retrieved dry columns of CH4 from MAMAP and could be used to investigate and refine underlying assumptions for the inversion procedures. With respect to the total emissions of the mine at the time of the overflight, the inferred emission rate of 50.4 kt CH4 yr−1 has a difference of less than 1% compared to officially reported values by the mine operators, while the uncertainty, which reflects variability of the sources and conditions as well as random and systematic errors, is about ±13.5%.
    Keywords: 550 - Earth sciences
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 10
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    The German Young Geoscientists Group - promoting exchange and information among the next generation of geoscientists (2011)
    In:  Geophysical Research Abstracts, 13, EGU2011-11312, 2011
    Details
    Publication Date: 2020-02-12
    Description: The group „Young geoscientists” of the Senate Commission for Joint Geoscientific Research (Geokommisson, www.geokommission.de) of the German Research Foundation (DFG), is dedicated towards the development of the working environment, workforce and scientific outcome of the next generation of geoscientists in Germany. Geoscientific research – basic as, well as applied – provides crucial contributions for mastering the economic, environmental and societal challenges of the near and medium-term future. Politics and society call for immediate answers, while geoscientific phenomena are complex and act on a large range of temporal and spatial scales. These demands, together with increases mobility requirements, lead to increasing pressure especially on young geoscientists. In this situation the main goals of the group “Young geoscientists” are: • Promotion of networking among young geoscientists • Information about science policy developments, funding opportunities and other relevant matters • Representing the interests of young scientists towards (science)-policy makers The dynamic development of geoscientific research, particularly collaborations across traditional disciplines, as well as in increasing demands from public and policy, calls for a continuous integration of young scientists. We promote this process by organizing round-table discussions, e.g. on “Guaranteeing good scientific praxis” or on “Hot topics and research funding”, by communicating information via the internet and by identifying structural deficiencies that might hinder the advancement of the geosciences and reporting them to decision makers. In this context, we are looking for: • European or international collaborators • Young geoscientists wishing to participate in / contribute to our activities • Suggestions on how to improve working conditions of the young and advancing geoscientists Personal contact and details on the work of the „Young geoscientists” can be found at this poster presentation. More information can also be found on www.geonachwuchs.de or contact Dr. Ingo Sasgen, sasgen@gfz-potsdam.de
    Keywords: 550 - Earth sciences
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