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  • 2015-2019  (3)
  • 1960-1964  (27)
  • 1940-1944  (5)
  • 1
    Book
    Book
    Studien zur Stammesgeschichte der Ammoniten; Lfg. 1 (1961)
    Mainz : Verl. der Akad. der Wiss. und der Literatur | Wiesbaden : Steiner [in Komm.]
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    In: Lfg. 1
    Type of Medium: Book
    Pages: 109 S., 2 Bl , Ill., graph. Darst
    Series Statement: Abhandlungen der Mathematisch-Naturwissenschaftlichen Klasse / Akademie der Wissenschaften und der Literatur 1960,10
    Language: German
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  • 2
    Book
    Book
    Studien zur Stammesgeschichte der Ammoniten; Lfg. III (1964)
    Mainz : Verl. der Akad. der Wiss. und der Literatur | Wiesbaden : Steiner [in Komm.]
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    In: Lfg. III
    Type of Medium: Book
    Pages: S. 261 - 406 , graph. Darst
    Series Statement: Abhandlungen der Mathematisch-Naturwissenschaftlichen Klasse / Akademie der Wissenschaften und der Literatur 1963,6
    Language: German
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  • 3
    Book
    Book
    Studien zur Stammesgeschichte der Ammoniten (1960-)
    Mainz : Verl. der Akad. der Wiss. und der Literatur | Wiesbaden : Steiner [in Komm.]
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    Type of Medium: Book
    Series Statement: Abhandlungen der Mathematisch-Naturwissenschaftlichen Klasse / Akademie der Wissenschaften und Literatur ...
    Language: German
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  • 4
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    A Statistical Study of Plasmaspheric Plumes and Ionospheric Outflows Observed at the Dayside Magnetopause (2016)
    Wiley-Blackwell
    Details
    Publication Date: 2016-01-12
    Description: We present a statistical study of plasmaspheric plumes and ionospheric outflows observed by the Cluster spacecraft near the dayside magnetopause. Plasmaspheric plumes are identified when the low-energy ions (〈 1 keV) with ∼90° pitch angle distributions are observed by the CIS/HIA instrument. The ionospheric outflows are characterized by unidirectional or bidirectional field-aligned pitch angle distributions of low-energy ions observed in the dayside magnetosphere. 43 (10%) plasmaspheric plume events and 32 (7%) ionospheric outflow events were detected out of the 442 times that C3 crossed the dayside magnetopause between 2007 and 2009. The occurrence rate of plumes at duskside is significantly higher than that at dawnside. The occurrence rate of outflows shows a weak dawn-dusk asymmetry. We investigate the dependence of the occurrence rates of plumes and ionospheric outflows on geomagnetic activity and on solar wind/IMF conditions. The plume events tend to occur during southward IMF (duskward solar wind electric field) and moderate geomagnetic activity ( K p = 3, -30 ≤ D s t 〈-10 nT). However, the ionospheric outflow events tend to occur during northward IMF (dawnward solar wind electric field). The ionospheric outflows do not occur when K p = 0, and the occurrence rate of the ionospheric outflows does not have a clear D s t dependence. 75% (46%) of the outflows are observed in the duskside for negative (positive) IMF B y . Conversely, 54% (25%) of the outflows are observed in the dawnside for positive (negative) IMF B y . Finally, the occurrence rates of both plumes and outflows increase with solar wind dynamic pressure.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley-Blackwell on behalf of American Geophysical Union (AGU).
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  • 5
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    Asymmetric Ionospheric Outflow Observed at the Dayside Magnetopause (2015)
    Wiley-Blackwell
    Details
    Publication Date: 2015-04-17
    Description: An important source of the terrestrial magnetospheric plasma is the Earth's ionospheric outflows from the high latitude regions of both hemispheres. The ionospheric ion outflows have rarely been observed at the dayside magnetopause. We report Cluster observations of the ionospheric ion outflows observed at the dayside magnetopause. The low-energy (up to 1.5 keV) electrons are detected with bi-directional pitch angle distributions indicating that the magnetic field lines are closed. The unidirectional cold ions (〈200 eV) are observed in the magnetosphere by both C1 and C3. The pitch angle distributions (0°– –75°) of the cold ions (〈1 keV) at the dayside magnetopause indicate that these cold ions are the ionospheric outflows comingonly from the southern hemisphere. The cold ions (〈200 eV) fluxes are modulated by the ULF wave electric field. Two different species (possibly H + and He + ) are observed in the magnetosphere. Our results suggest that the ionospheric outflows can directly reach the dayside magnetopause region and may participate in the reconnection process.
    Print ISSN: 0148-0227
    Topics: Geosciences , Physics
    Published by Wiley-Blackwell on behalf of American Geophysical Union (AGU).
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  • 6
    Electronic Resource
    Electronic Resource
    Amino Acid Composition of Protozoa. Comparative Studies on Tetrahymena (1961)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 8 (1961), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Patterns for free and protein amino acids and related substances were determined for Tetrahymena limacis and 7 strains of T. pyriformis from axenic stationary phase cultures grown at 25° C by means of 2-dimensional chromatography in a butanol-acetic acid and phenol solvent system with ninhydrin and other polychromatic indicators. A uniform protein amino acid (PAA) pattern was observed in all strains. There were 14 color spots indicating 19 amino acids (including cysteic acid), identified as follows: alanine, arginine, aspartic acid, cysteine/cystine, cysteic acid, glutamic acid, glycine, leucine/isoleucine/phenylalanine, lysine/histidine, proline, serine, threonine, tyrosine, valine/methionine.The following free amino acids and related substances (FAAs) were identified with 14 spots (several different from these for PAA patterns) found in all strains: alanine, arginine, asparagine, aspartic acid, glutamic acid, glutamine, glycine, leucine/isoleucine/phenylalanine, lysine histidine. proline, serine, threonine, tyrosine, valine/methionine. T. limacis and strains LI and Gf-J of T. pyriformis exhibited these only. Chromatograms of 5 strains of T. pyriformis (PR. F. L3 WH52, HS), however, also contained 1 to 4 spots representing certain of the following substances: Cysteic acid, cysteine/cystine, taurine, and the unknowns X1, X2, and X3, having Rf's of 0.33, 0.79, and 0.72 respectively in 4:1 phenol-H2O system Excepting for F and L3, which were similar, the T. pyriformis strains showed quite different distributional patterns of these substances at 25°C. Other deviations in the distribution of the 6 compounds were noted in the chromatograms of 10° and 35° cultures of WH52 and HS. These findings on FAAs and PAAs are tabulated, along with those of previous investigators, to furnish comparisons on 13 strains of Tetrahymena pyriformis, T. limacis and 9 other species of protozoa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1961.tb01202.x
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  • 7
    Electronic Resource
    Electronic Resource
    A Comparison of Synchronized Cell Division in Protozoa (1962)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 9 (1962), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. From an equation derived for measuring synchrony in microbial systems, a synchronization index (SI) may be computed, which depends on 3 parameters: (1) fraction of the population undergoing synchronous division; (2) time during which this synchrony of division occurs, and (3) generation time during normal exponential multiplication.Synchronization indices were computed and tabulated for 14 microbial cultures in which cell division was synchronized by different methods. The SI's range from 0.20 to 0.80. In the ideal situation—instantaneous doubling of the cell number in the mass culture—the SI is 1.00.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1962.tb02582.x
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  • 8
    Electronic Resource
    Electronic Resource
    The Characterization of Capillaries Used for Dropping Mercury Electrodes in Polarographic Studies (1944)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 66 (1944), S. 1019-1023 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01234a056
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  • 9
    Electronic Resource
    Electronic Resource
    POSSIBLE SITES OF METABOLIC CONTROL DURING THE INDUCTION OF SYNCHRONOUS CELL DIVISION (1960)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 90 (1960), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1960.tb23273.x
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  • 10
    Electronic Resource
    Electronic Resource
    ADAPTIVE ANALOG MODELS FOR BIOLOGICAL RHYTHMS (1962)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 98 (1962), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1962.tb30601.x
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