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  • 1
    Electronic Resource
    Electronic Resource
    A simple, corrosion-resistant flow cell for laser-induced photoacoustic spectroscopic detection of high-performance liquid chromatography effluents (1982)
    Springer
    Chromatographia 15 (1982), S. 645-649 
    Details
    ISSN: 1612-1112
    Keywords: laser-induced photoacoustic spectroscopy ; High-performance liquid chromatography detector ; Flow cell ; Polynuclear aromatic hydrocarbons ; Piezoelectric ceramic transducer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A simple, corrosion-resistant and non-destructive flow cell optimized for laser induced photoacoustic spectroscopic detection of HPLC effluents is described. The characteristics and analytical figures of merit of the flow cell are presented. Application of the flow cell to the detection of polynuclear aromatic hydrocarbons in HPLC effluent is demonstrated. Limits of detection were on the order of tenths of parts per million. Comparisons with the conventional UV absorbance detector and among various laser powers are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02279492
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    Paper (German National Licenses)
    Fulltext
  • 2
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    On propagation direction of ring current proton ULF waves observed by ATS 6 at 6.6 R sub E (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: From June 11 to September 16, 1974, the NOAA low-energy proton detector on board the ATS 6 satellite observed 71 cases of ultralow-frequency oscillations of proton flux intensities. The oscillation periods varied from 40 s to 6 min, and the events were observed most frequently during moderate geomagnetic conditions. The flux oscillations occurred at various local times, yet almost two thirds of the events were detected in the near-dusk region of the magnetosphere. For a majority of the events in this set a substantial phase shift in flux oscillation was detected between different energy channels and/or between two oppositely oriented detector telescopes. The phase shift is mainly due to the finite gyroradius effect of the protons gyrating in the geomagnetic field. By examining this finite gyroradius effect on the perturbed particle distribution function associated with the wave in a nonuniform magnetic field, the propagation direction of the wave from particle observations made by a single spacecraft is determined
    Keywords: SPACE RADIATION
    Type: Journal of Geophysical Research; 82; May 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    First-order orbit theory of the rotational discontinuity. (1968)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Propagation and internal equilibrium structure of Alfven wave which conserves magnitude of magnetic field component
    Keywords: SPACE SCIENCES
    Type: ; YAL SOCIETY (
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    On the equilibrium of the magnetopause current layer (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Magnetopause current layer equilibrium based on numerical solution of uniform magnetic field confinement by warm plasma with net parallel velocity
    Keywords: SPACE SCIENCES
    Type: ; UG REVUE(
    Format: text
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    NASA TECHNICAL REPORTS
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