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  • 1
    Electronic Resource
    Electronic Resource
    AN UNUSUAL HETEROCYCLIC SYSTEM INVOLVING CHARGE SEPARATION AND HEXACOVALENT PHOSPHORUS (1961)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 83 (1961), S. 3917-3918 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01479a054
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  • 2
    Electronic Resource
    Electronic Resource
    Di-urethans as Local Anesthetics (1934)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 56 (1934), S. 1630-1630 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01322a057
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  • 3
    Electronic Resource
    Electronic Resource
    Case studies of the propagation characteristics of auroral TIDS with EISCAT CP2 data using maximum entropy cross-spectral analysis (1998)
    Springer
    Annales geophysicae 16 (1998), S. 161-167 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere ; auroral ionosphere ; Ionosphere-atmosphere interactions ; wave propagation)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract In this paper case studies of propagation characteristics of two TIDs are presented which are induced by atmospheric gravity waves in the auroral F-region on a magnetic quiet day. By means of maximum entropy cross-spectral analysis of EISCAT CP2 data, apparent full wave-number vectors of the TIDs are obtained as a function of height. The analysis results show that the two events considered can be classified as moderately large-scale TID and medium-scale TID, respectively. One exhibits a dominant period of about 72 min, a mean horizontal phase speed of about 180 m/s (corresponding to a horizontal wavelength of about 780 km) directed south-eastwards and a vertical phase speed of 55 m/s for a height of about 300 km. The other example shows a dominant period of 44 min, a mean horizontal phase velocity of about 160 m/s (corresponding to a horizontal wavelength of about 420 km) directed southwestwards, and a vertical phase velocity of about 50 m/s at 250 km altitude.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-998-0161-3
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  • 4
    Electronic Resource
    Electronic Resource
    Combined ESR and EISCAT observations of the dayside polar cap and auroral oval during the May 15, 1997 storm (2000)
    Springer
    Annales geophysicae 18 (2000), S. 1067-1072 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere (auroral ionosphere; polar ionosphere) ; Magnetospheric physics (storms and substorms)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The high-latitude ionospheric response to a major magnetic storm on May 15, 1997 is studied and different responses in the polar cap and the auroral oval are highlighted. Depletion of the F2 region electron density occurred in both the polar cap and the auroral zone, but due to different physical processes. The increased recombination rate of O+ ions caused by a strong electric field played a crucial role in the auroral zone. The transport effect, however, especially the strong upward ion flow was also of great importance in the dayside polar cap. During the main phase and the beginning of the recovery phase soft particle precipitation in the polar cap showed a clear relation to the dynamic pressure of the solar wind, with a maximum cross-correlation coefficient of 0.63 at a time lag of 5 min.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-000-1067-x
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  • 5
    Electronic Resource
    Electronic Resource
    Photoluminescence from nanometer Ge particle embedded Si oxide films (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 559-563 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nanometer Ge particle (NGP) embedded Si oxide films were deposited on p-type Si substrates using the rf magnetron sputtering technique with a Ge–SiO2 composite target. The area ratio percentage of the Ge target to the composite target was 5%. These films were annealed in a N2 ambient at 300, 600, 800, or 900 °C for 30 min. By fitting Raman scattering spectra, the average diameters of the NGPs in the films were determined. They increased from 5.4 to 9.5 nm with increasing annealing temperatures from 600 to 900 °C. The photoluminescence (PL) peaks for all NGP embedded Si oxide films annealed at various temperatures are located at almost the same position around 580 nm (2.1 eV), although the average sizes of the NGPs in these films are very different from each other. After γ-ray irradiation, the PL peak intensity increases by a factor of 2.3, with the peak position unchanged. The PL peak position does not show any evident shift when the measurement temperature increases from 10 to 300 K. All experimental facts indicate that light emission originates mainly from the luminescence centers in the SiOx films covering the NGPs rather than from the NGPs. The role of NGPs in the PL process of the films is discussed. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.368084
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  • 6
    Electronic Resource
    Electronic Resource
    Nationalism: State-building or state-destroying?
    Amsterdam : Elsevier
    The @Social Science Journals 29 (1992), S. 293-305 
    Details
    ISSN: 0362-3319
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Sociology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0362-3319(92)90023-B
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  • 7
    Electronic Resource
    Electronic Resource
    Pramipexole attenuates the dopaminergic cell loss induced by intraventricular 6-hydroxydopamine (2000)
    Springer
    Journal of neural transmission 107 (2000), S. 159-176 
    Details
    ISSN: 1435-1463
    Keywords: Keywords: Pramipexole, dopamine, 6-hydroxydopamine, Parkinson, rat, agonist, neuroprotection.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary. The D3 preferring dopamine agonist pramipexole has been shown to attenuate the cell loss induced by levodopa in vitro. Pramipexole was herein evaluated in the 6-hydroxydopamine lesion model to determine its in vivo effect. Rats were treated with pramipexole or saline before and after an intracerebroventricular 6-hydroxydopamine injection. In the preliminary study, 6-hydroxydopamine produced a 68% reduction in striatal dopamine and a 62% loss in tyrosine hydroxylase immunoreactive (THir) cell counts in the substantia nigra. Pramipexole treated animals exhibited a 29% and a 27% reduction in striatal dopamine and THir cell counts, respectively. THir cell counts and striatal dopamine were significantly correlated. In the stereological study, 6-hydroxydopamine reduced THir cell counts by 47% in saline treated animals and 26% in pramipexole treated animals. These data demonstrate that pramipexole attenuates the biochemical and THir cell changes normally produced by 6-hydroxydopamine consistent with its neuroprotective actions in vitro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007020050014
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