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  • 1990-1994  (3)
  • 1925-1929  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Fine-scale patchiness and genetic heterogeneity of recruits of the corallivorous gastropod Drupella cornus (1993)
    Springer
    Marine biology 117 (1993), S. 91-96 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The size-frequency distributions and genetic composition of recruits of the corallivorous snail Drupella cornus (Röding, 1798) were examined in outbreak populations collected from Ningaloo Reef, Western Australia in August 1990. The recruits are found in groups on digitate Acropora spp. corals. Among coral colonies, mean lengths of recruits in our samples ranged from 〈9 to 22 mm, but the snails within a group were generally similar in size. Despite the fact that D. cornus has planktonic larvae, there were marked genetic differences between groups of recruits on different coral colonies. The relatively large genetic subdivision among groups of recruits within sites over distances 〈80 m was measured as a value of F ST (standardized variance in allelic frequencies) of 0.044. This was three times the value from comparisons of pooled samples of recruits from areas up to 119 km apart, and six times as great at the genetic subdivision among populations of adults over a distance of 180 km. Much of the genetic heterogeneity among groups of recruits is associated with mean size of the snails. Taken together, the size-frequency distributions and the genetic differences indicate that recruits within the same coral colony shared a common history of settlement, suggesting a cohesiveness of groups of larvae. Although the mechanisms for this patchiness are not understood, one implication is that studies of size-frequency distributions and genetic composition of cohorts of D. cornus must treat the group, not the individual snail, as the unit of replication.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00346429
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    Paper (German National Licenses)
    Fulltext
  • 2
    facet.materialart.
    Unknown
    Karl Holl, geb. 15. Mai 1866, gest. 23. Mai 1926 (1927)
    Stuttgart, etc. : Periodicals Archive Online (PAO)
    Deutsche Vierteljahrsschrift für Literaturwissenschaft und Geistesgeschichte. 5 (1927) 413 
    Details
    ISSN: 0012-0936
    Topics: German, Dutch and Scandinavian Studies
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:0088-1927-005-00-000014
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Population genetics of the corallivorous gastropod Drupella cornus at Ningaloo Reef, Western Australia (1994)
    Springer
    Coral reefs 13 (1994), S. 33-39 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract A precipitous increase in the abundance of the corallivorous snail Drupella cornus at Ningaloo Reef, Western Australia, raises fundamental questions about the population structure and genetics of this species. We examined genetic heterogeneity at ten polymorphic allozyme loci among samples of adult D. cornus from nine sites along 180 km of Ningaloo Reef, plus two sites from the Abrolhos Islands and one from the Dampier Archipelago, spanning a total distance of 1170 km. Variations in allelic frequencies were small (average FST=0.007), indicating that a high degree of planktonic dispersal is the norm. Nevertheless, some heterogeneity among samples was found at four of the loci. This heterogeneity occurred within Ningaloo Reef and did not increase with geographic distance. The local heterogeneity was not a function of habitat type but seemed to be associated with stage of outbreak. However, all outbreak populations came from within Ningaloo Reef and the non-outbreak populations were from outside Ningaloo Reef proper. Our results show peculiarities in the genetic structure of D. cornus on Ningaloo Reef, but the causes are not understood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00426432
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Configuration factor for radiation in a tunnel or partial cylinder (1993)
    Springer
    Fire technology 29 (1993), S. 281-288 
    Details
    ISSN: 1572-8099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract The configuration factor for thermal radiation from a section of the ceiling of a tunnel or the inner surface of a partial cylinder to a point on the axis has been derived. Calculations indicate the possibility of high incident radiative heat fluxes from the ceiling to the center. Configuration factors have been calculated for a column furnace used for fire resistance testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01152111
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Über die Isothermen einiger Gase zwischen +400° und −183° (1925)
    Springer
    The European physical journal 33 (1925), S. 1-11 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Im Zusammenhang mit neuen Isothermenmessungen an Wasserstoff und Neon wird eine Übersicht gegeben über die bisher bestimmten pv -Werte dieser Gase, sowie des Heliums, des Stickstoffs, der Luft, des Argons und des Sauerstoffs im Bereiche von + 400° bis − 183° bei Drucken bis 100 Atm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01328287
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Über die Isothermen von Helium, Wasserstoff und Neon unterhalb − 2000 (1926)
    Springer
    The European physical journal 38 (1926), S. 359-367 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Früher angestellte Isothermenmessungen bis 100 Atm. wurden bei − 2080 durch Beobachtungen an Helium, Wasserstoff und Neon ergänzt; ferner wurde Helium bei − 252,80 und − 258,00 untersucht. Nebst der Darstellung der Isothermen wird die Korrektion des Gasthermometers auf die thermodynamische Skale für die angegebenen Temperaturen abgeleitet und damit deren Beobachtungsbereich, das sich nach oben bis + 4000 erstreckt, nach unten auf − 260/0 erweitert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01397504
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    Paper (German National Licenses)
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