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  • 1
    Electronic Resource
    Electronic Resource
    Mapping the top of the permafrost using surface direct current resistivity survey (1997)
    Springer
    Environmental geology 30 (1997), S. 29-33 
    Details
    ISSN: 1432-0495
    Keywords: Key words Permafrost ; Resistivity ; Alaska
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Data from a direct current resistivity survey and geologic logs from boreholes were used to map the top of permafrost at a remote air force installation in Alaska. This study resulted from a remedial investigation that was conducted at Eielson Air Force Base near Fairbanks, Alaska, under the federal Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) regulations. The depth and continuity of the permafrost was important in determining the fate of petroleum contamination that was inadvertently discharged to the ground during earlier air force operations. The results indicate that the top of permafrost forms a highly irregular surface. In general, however, the top of permafrost forms a diagonal ridge at the center of the contour grid that is bordered on each side by troughs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050129
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Letter to the editor (1992)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 6 (1992), S. 719-720 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290061118
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A combined magnetic sector-time-of-flight mass spectrometer for structural determination studies by tandem mass spectrometry (1995)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 9 (1995), S. 1227-1233 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A combined magnetic sector-time-of-flight instrument has been constructed and used with both continuous (liquid secondary ion mass spectrometry and electrospray ionization) and pulsed (matrix-assisted laser desorption/ionization) ion sources. The design includes provision for both low- and high-energy gas collision induced decompositions and orthogonal acceleration of the product ions into the time-of-flight mass analyser. Tandem mass spectra may be acquired for singly and multiply charged precursor ions and reliable mass measurements are easily obtained. Product-ion mass spectra are quite reproducible regardless of any instability in the precursor ion beam intensity.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290091302
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    Paper (German National Licenses)
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