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  • Artikel: DFG Deutsche Nationallizenzen  (5)
  • Inorganic Chemistry  (2)
  • population growth  (2)
  • 20.40. + z  (1)
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  • Artikel: DFG Deutsche Nationallizenzen  (5)
Materialart
Erscheinungszeitraum
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  • 1
    Digitale Medien
    Digitale Medien
    High spin states of some nuclei around the N=Z=28 double closed shell (1989)
    Springer
    The European physical journal 334 (1989), S. 365-376 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 20.40. + z ; 23.20.-g ; 21.60.CS
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A spectroscopic study is performed for high spin states of55Fe,55Co and57Ni. To populate the investigated residues with a relevant cross section, the fusion evaporation reactions of30Si(28Si, 2pn)55Fe,30Si(28Si, 2np)55Co and4He(54Fe,n)57Ni were chosen. To identify the newγ transitions and to build the energy level schemes,γ — γ coincidence techniques together with excitation functions were employed. Angular distributions andγ — γ angular correlations allowed us to assign the spin values of the nuclear states. The previous level scheme of55Fe is extended into the region between 6.5–11 MeV of excitation energy, up to spin 27/2, while the yrast decay paths of57Ni and55Co are reported here for the first time. Experimental data are fairly well reproduced by Glaudemans' shell model calculations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294741
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Demography and population growth of Asplanchna girodi (Rotifera) as a function of prey (Anuraeopsis fissa) density (1995)
    Springer
    Hydrobiologia 306 (1995), S. 97-107 
    Details
    ISSN: 1573-5117
    Schlagwort(e): prey-predator interaction ; population growth ; mortality ; rotifers
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Laboratory studies on population growth and life table demography of Asplanchna girodi were conducted at 25±1 °c using Anuraeopsis fissa as prey at four (250, 500, 1000 and 2000 ind ml−1) densities. A prey density of 100 ind ml−1 per predator per day did not support A. girodi, while at the highest prey concentration, A. girodi reached a peak of 115±7 ind ml−1. The age distribution of A. girodi indicated that non-adults constituted about 2/3rd of the population at all prey concentrations. A decrease in prey availability resulted in increased mortality of non-adults. At the highest prey density, the rate of population increase (r) was 1.51 d−1. The significance of estimating mortality in population growth studies is discussed. Life table demography of A. girodi was also studied using the same prey at the same concentrations. None of the survivorship parameters (e.g. mean lifespan and mean survivorship) showed a significant relation to prey density. Net reproductive rate and generation time (but not rate of population increase) were affected by prey abundance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00016827
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  • 3
    Digitale Medien
    Digitale Medien
    Feeding preference and population growth of Asplanchna brightwelli (Rotifera) offered two non-evasive prey rotifers (1997)
    Springer
    Hydrobiologia 361 (1997), S. 77-88 
    Details
    ISSN: 1573-5117
    Schlagwort(e): Rotifer ; biomass ; predation ; population growth ; handlingtime
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Population growth rates of the predatory rotifer Asplanchna brightwelli were determined at 25 °C using a large (Brachionus calyciflorus) and a small (Anuraeopsis fissa) rotifer prey species in three concentrations (0.5, 0.1 and 2.0 μg dry weight ml-1) and in five combinations. The prey ingestion time by the predator was also measured. For B. calyciflorus the ingestion time (22.97–8.95 s) was more than six times that of A. fissa (3.68 ± 0.93). Regardless of prey type, the population growth of Asplanchna increased with increasing food density. There was a direct correlation between densities of amictic and mictic fernales. The maximum rate of population growth (1.01 ± 0.10 d-1) was higher at high density of A. fissa prey than that at the same density of B. calyciflorus. Progressive increase of A. fissa density in the offered food combination resulted in a corresponding increase of the predator's number. Gut content analysis of A. brightwelli revealed that the number of prey ingested increased with increasing prey densities.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1003189312452
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  • 4
    Digitale Medien
    Digitale Medien
    Zur Kenntnis der Cumaron-Gruppe (1909)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 42 (1909), S. 911-915 
    Details
    ISSN: 0365-9496
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.190904201149
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  • 5
    Digitale Medien
    Digitale Medien
    Zur Kenntnis des 1.3-Dimethoxy-cumaranons (1910)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 43 (1910), S. 1969-1971 
    Details
    ISSN: 0365-9496
    Schlagwort(e): Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.191004302134
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