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  • 1
    Series available for loan
    Series available for loan
    Reguläre und exzessive Variationen des ionosphärischen Plasmas in der Mesospäre und unteren Thermospäre hoher Breiten : wissenschaftliche Auswertung des ionosphärischen Meßprogramms des Zentralinstituts für solar-terristische Physik während der 21.-23. Sowjetischen Antarktisexpedition 1975-1978 (1984)
    Berlin : Nationalkomitee für Geodäsie und Geophysik bei der Akademie der Wissenschaften der DDR
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    Call number: MOP Per 581(1/10) ; ZSP-319/A-10 ; ZSP-319/A-10(2. Ex.)
    In: Geodätische und geophysikalische Veröffentlichungen : Reihe 1, Heft 10
    Type of Medium: Series available for loan
    Pages: 139 Seiten , Illustrationen
    ISSN: 0533-7577
    Series Statement: Geodätische und geophysikalische Veröffentlichungen : Reihe 1 10
    Language: German
    Note: INHALTSVERZEICHNIS: ZUSAMMENFASSUNG (deutsch, englisch, russisch). - 1. EINLEITUNG. - 1.1 Wissenschaftliche Aufgabenstellung. - 1.2 Meßort und Maßzeitraum. - 1.3 Verwendetes Datenmaterial. - 2. ANALYSE DER HEP-ABREGNUNGSPHASEN IM TAGESGANG. - 2.1 Tagesgänge der HEP-Ionisation in hohen Breiten. - 2.2 Tagesgänge in mittelhohen Breiten und Nachwirkungseffekte. - 3. PARTIKELPAAZIPITATION WÄHREND AUSGEWÄHLTER POLARLICHTERSCHEINUNGEN. - 3.1 Allgemeines. - 3.2 Substorm-Eventuntersuchungen während der 21. SAE. - 3.2.1 Zusammenstellung des Beobachtungsmaterials. - 3.2.2 Polarlicht und auroraler Elektrojet. - 3.2.3 Polarlicht und ionosphärische Absorption. - 3.2.4 Die breitenmäßige Verteilunq der Polarlichtluminosität. - 3.2.5 Beobachtete Intensitätsverhältnisse von Polarlichtemissionen. - 3.3 Substorm-Eventuntersuchungen während der 22. SAE. - 3.3.1 Zusammenstellung des Beobachtungsmaterials. - 3.3.2 Eventbeschreibung. - 3.3.3 Diskussion der Beobachtungsresultate der 22. SAE. - 4. STEUERUNG DER PARTIKELPRÄZIPITATION DURCH DEN SOLAREN WIND UND DAS INTERPLANETARE MAGNETFELD. - 4.1 Physikalische Modellvorstellungen zur Energieübertragung aus dem Sonnenwind in die Erdatmosphäre. - 4.2 Einfluß von IMF-Sektordurchgängen auf das ionosphärische Plasma. - 4.3 Tages- und jahreszeitlicher Einfluß der IMF-Sektorstruktur auf das ionosphärische Plasma. - 4.4 Auswirkungen solarer Plasmaströme auf das ionosphärische Plasma. - 4.5 Vergleich der Energieübertragungsfunktion mit ionosphärischen Meßergebnissen. - 4.6 Zusammenfassung und Diskussion. - 5. EINIGE SPEZIELLE MIT DER PARTIKELEINREGNUNG VERBUNDENE PROBLEME. - 5.1 Exzessive D-Schicht Ionisation mittlerer Breiten in Sturm- und Nachwirkungsphase. - 5.2 Einige statistische Betrachtungen zur Rolle des D-Schicht Plasmas als Tracer für die HEP-Einregnung und NO Akkumulation. - 5.3 Exkursion zum statistischen Zusammenhang von Kp-Indizes und Events in A2-Messungen. - 5.4 Einige Bemerkungen zur Rolle der HEP II-Flüsse bei der Winteranomalie. - 6. ZUSAMMENFASSUNG UND EINSCHÄTZUNG DER ERGEBNISSE. - ABBILDUNGEN. - FIGURE CAPTIONS. - LITERATURVERZEICHNIS. - Anhang 1: Ionosphärische Absorptionsmessunqen in hohen Breiten (J. BREMER, K. EVERS, D. KEUER, H. RÖSSLER). - Anhang 2: Beobachtung von Polarlichtern mit dem Spektralphotometer (A. GRAFE). , Zusammenfassung in deutscher, englischer und russischer Sprache
    Location: MOP - must be ordered
    Location: AWI Archive
    Location: AWI Archive
    Branch Library: GFZ Library
    Branch Library: AWI Library
    Branch Library: AWI Library
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  • 2
    Electronic Resource
    Electronic Resource
    Geomagnetic control of polar mesosphere summer echoes (2000)
    Springer
    Annales geophysicae 18 (2000), S. 202-208 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere (auroral ionosphere) ; Magnetospheric physics (energetic particles, precipitating) ; Radio science (remote sensing)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Using observations with the ALOMAR SOUSY radar near Andenes (69.3°N, 16.0°E) from 1994 until 1997 polar mesosphere summer echoes (PMSE) have been investigated in dependence on geomagnetic K indices derived at the Auroral Observatory Tromsø (69.66°N, 18.94°E). During night-time and morning hours a significant correlation between the signal-to-noise ratio (SNR) of the radar results and the geomagnetic K indices could be detected with a maximum correlation near midnight. The correlation becomes markedly smaller in the afternoon and early evening hours with a minimum near 17 UT. This diurnal variation is in reasonable agreement with riometer absorption at Ivalo (68.55°N, 27.28°E) and can be explained by the diurnal variation of ionization due to precipitating high energetic particles. Therefore, a part of the diurnal PMSE variation is caused by this particle precipitation. The variability of the solar EUV variation, however, has no significant influence on the PMSE during the observation period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-000-0202-z
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  • 3
    Electronic Resource
    Electronic Resource
    Genetic evidence for inter-oceanic subdivision of bigeye tuna (Thunnus obesus) populations (1998)
    Springer
    Marine biology 132 (1998), S. 547-557 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Bigeye tuna (Thunnus obesus Lowe, 1839) are a commercially important species of tuna found in the Atlantic, Indian, and Pacific oceans. To initiate an analysis of bigeye tuna population-structure, three PCR–RFLP assays were developed based on the published mtDNA control-region sequences of four bigeye tuna. Population analyses using these three restriction assays on a total of 248 individuals resulted in an array of 13 composite haplotypes. A total of 347 nucleotides of mtDNA control-region sequence was characterized for 11 of the 13 composite haplotypes. Phylogenetic analyses demonstrated that the DNA sequences belong to two monophyletic clades. However, only one of the three restriction assays was able to discriminate between the two clades. The other two assays were confounded by excessive homoplasy. Both parallel (independent occurrences of the same nucleotide change) and convergent (different nucleotide changes within the same restriction site) changes of restriction sites were observed. These results emphasize the importance of DNA sequence-analysis for the interpretation of restriction-site polymorphism data. Analyses of the frequency distribution indicated that samples of bigeye tuna from the Atlantic Ocean were genetically distinct from those found in the Indian and Pacific oceans. Thus, these results reject the null hypothesis of a single global population of bigeye tuna.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270050420
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  • 4
    Electronic Resource
    Electronic Resource
    PMSE observations at three different frequencies in northern Europe during summer 1994 (1997)
    Springer
    Annales geophysicae 14 (1997), S. 1317-1327 
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    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Simultaneous observations of polar mesosphere summer echoes (PMSE) have been carried out during summer 1994 in northern Norway using three radars on different frequencies: the ALOMAR SOUSY radar at Andenes on 53.5 MHz, the EISCAT VHP radar at Tromsø on 224 MHz and the MF radar at Tromsø on 2.78 MHz. During the common measuring period in July/August 1994, PMSE could be detected at 224 and 53.5 MHz, and there are strong hints that PMSE also occur at 2.78 MHz. Reliable correlations between hourly backscattered power values indicate that the PMSE structures have zonal extensions of more than 130 km and can be detected at very different scales (half wavelength) between 0.67 (EISCAT VHP radar) and 54 m (MF radar). Using the wind values derived by the MF radar it can be shown that the mesospheric wind field influences the structure of PMSE. The diurnal variation of PMSE is strongly connected with tidal-wind components, whereas spatial differences of PMSE can partly be explained by the mean wind field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-996-1317-7
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  • 5
    Electronic Resource
    Electronic Resource
    Trends in the ionospheric E and F regions over Europe (1998)
    Springer
    Annales geophysicae 16 (1998), S. 986-996 
    Details
    ISSN: 0992-7689
    Keywords: Atmospheric composition and structure (Pressure, density and temperature) ; Ionosphere (Mid-latitude ionosphere) ; Radio science (Ionospheric propagation)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Continuous observations in the ionospheric E and F regions have been regularly carried out since the fifties of this century at many ionosonde stations. Using these data from 31 European stations long-term trends have been derived for different parameters of the ionospheric E layer (h′ E, foE), F1 layer (foF1) and F2 layer (hmF2,foF2). The detected trends in the E and F1 layers (lowering of the E region height h′E; increase of the peak electron densities of the E and F1 layers, foE and foF1) are in qualitative agreement with model predictions of an increasing atmospheric greenhouse effect. In the F2 region, however, the results are more complex. Whereas in the European region west of 30° E negative trends in hmF2 (peak height of the F2 layer) and in the peak electron density (foF2) have been found, in the eastern part of Europe (east of 30° E) positive trends dominate in both parameters. These marked longitudinal differences cannot be explained by an increasing greenhouse effect only, here probably dynamical effects in the F2 layer seem to play an essential role.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-998-0986-9
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  • 6
    Electronic Resource
    Electronic Resource
    Ionospheric measurements during the CRISTA/MAHRSI campaign: their implications and comparison with previous campaigns (1999)
    Springer
    Annales geophysicae 17 (1999), S. 1040-1052 
    Details
    ISSN: 0992-7689
    Keywords: Ionosphere (ionosphere - atmosphere interactions; mid-latitude ionosphere)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The CRISTA/MAHRSI experiment on board a space shuttle was accompanied by a broad campaign of rocket, balloon and ground-based measurements. Supporting lower ionospheric ground-based measurements were run in Europe and Eastern Asia between 1 October–30 November, 1994. Results of comparisons with long ionospheric data series together with short-term comparisons inside the interval October-November, 1994, showed that the upper middle atmosphere (h =80–100 km) at middle latitudes of the Northern Hemisphere in the interval of the CRISTA/MAHRSI experiment (4–12 November, 1994) was very close to its expected climatological state. In other words, the average results of the experiment can be used as climatological data, at least for the given area/altitudes. The role of solar/geomagnetic and “meteorological” control of the lower ionosphere is investigated and compared with the results of MAP/WINE, MAC/SINE and DYANA campaigns. The effects of both solar/geomagnetic and global meteorological factors on the lower ionosphere are found to be weak during autumn 1994 compared to those in MAP/WINE and DYANA winters, and they are even slightly weaker than those in MAP/SINE summer. The comparison of the four campaigns suggests the following overall pattern: in winter the lower ionosphere at northern middle latitudes appears to be fairly well “meteorologically” controlled with a very weak solar influence. In summer, solar influence is somewhat stronger and dominates the weak “meteorological” influence, but the overall solar/meteorological control is weaker than in winter. In autumn we find the weakest overall solar/meteorological control, local effects evidently dominate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-999-1040-2
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  • 7
    Electronic Resource
    Electronic Resource
    The two-wave X-ray field calculated by means of integral-equation methods (1984)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 40 (1984), S. 283-291 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The problem of calculating the two-wave X-ray field on the basis of the Takagi-Taupin equations is discussed for the general case of curved lattice planes. A two-dimensional integral equation which incorporates the nature of the incoming radiation, the form of the crystal/vacuum boundary, and the curvature of the structure, is deduced. Analytical solutions for the symmetrical Laue case with incoming plane waves are obtained directly for perfect crystals by means of iteration. The same method permits a simple derivation of the narrow-wave Laue and Bragg cases. Modulated wave fronts are discussed, and it is shown that a cut-off in the width of an incoming plane wave leads to lateral oscillations which are superimposed on the Pendellösung fringes. Bragg and Laue shadow fields are obtained. The influence of a non-zero kernel is discussed and a numerical procedure for calculating wave amplitudes in curved crystals is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767384000568
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  • 8
    Electronic Resource
    Electronic Resource
    The intensity fringes of three coupled waves in crystals (1986)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 42 (1986), S. 191-197 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Two different kinds of interaction between three waves D0, Dh and Dg in a perfect crystal are investigated in the case of Laue scattering using the Takagi-Taupin equations. Polarization effects (coupling between {\hat \sigma} and {\hat \pi} waves) are neglected, and it is assumed that the incoming vacuum wave D0(e) has a small wave-front area whose spatial extension is simulated by a point source on the crystal surface. The solutions of the diffraction equations thus constitute the boundary-value Green functions for the wave fields. In the first case it is assumed that Dg is only indirectly coupled to D0. In the second case energy is allowed to be exchanged between D0 and Dh and between D0 and Dg, but no Dh-Dg interaction is present. In both of these situations the field amplitudes are given by expressions that contain simple products of zeroth- and first-order Bessel functions. It is suggested that the intensity pattern can be observed directly. The transition to an incoming plane wave is outlined, and it is also demonstrated that the hyperbolic intensity fringes generated by two spherical waves can be deduced from the derived expressions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767386099543
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  • 9
    Electronic Resource
    Electronic Resource
    Active transport of butyrobetaine and carnitine into isolated liver cells
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 448 (1976), S. 562-577 
    Details
    ISSN: 0005-2736
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2736(76)90110-3
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  • 10
    Electronic Resource
    Electronic Resource
    The submitochondrial distribution of acid: CoA ligase (AMP) and palmityl-CoA: Carnitine palmityltransferase in rat liver mitochondria
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 24 (1966), S. 797-804 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0006-291X(66)90397-4
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