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  • 1980-1984  (2)
  • 1970-1974  (1)
Document type
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Fine structure of developing and mature spermatozoa in Tubiluchus (priapulida, tubiluchidae) (1983)
    Springer
    Zoomorphology 103 (1983), S. 219-227 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Spermiogenesis and sperm cells of the meiobenthic priapulid Tubiluchus were described by means of the transmission electron microscope. The sperm cells are completely different from the male gametes of Priapulus, being elongated and thus indicating a different mode of sperm transfer. The anterior portion of the sperm head is characterised by a corkscrew configuration of nucleus and acrosome, both components being wrapped around each other. This kind of sperm cell has never been reported in other animal phyla.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310479
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Light- and electron microscopical studies on the anatomy and function of the gills of krill (Euphausiacea, Crustacea) (1983)
    Springer
    Polar biology 1 (1983), S. 233-242 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The gills of the euphausiid crustaceans — Euphausia superba Dana, Meganycliphanes norvegica (Sars) — contain two longitudinal channels separated by epithelial tissue. These channels, functioning as afferent and efferent vessels, are connected at regular intervals by transverse channels in the gill filaments. By contraction of the gill muscles the krill is able to draw back its gills against its body wall, thus reducing water-current resistance. By increasing the haemolymphic pressure, the gill filaments can perhaps be unfolded again. Besides the muscle cells and supplying nerves, fine-structural observations revealed several cell types in the euphausiid gills, considered from their morphological characteristics to be transport cells, respiratory cells, secretory cells serving a transepithelial ion transport, gas exchange and secretion. A further cell type (flat cells) presumably has a regulatory and/or filtering function on the haemolymphic current. The components are arranged in a complex order, reflecting the functional efficiency of the organs concerned. Similarities are pointed out with dendrobranchia of Penaeus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00443194
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Pumpen und Verdichter in Chloralkali-Elektrolyse-AnlagenVortrag auf dem Jahrestreffen der Verfahrens-Ingenieure, 30. September bis 2. Oktober 1969 in Bayreuth. (1970)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 42 (1970), S. 462-466 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es werden die Anforderungen beschrieben, welche von der Stoffseite her in einer Chloralkali-Elektrolyse-Anlage an Pumpen und Verdichter gestellt werden. Als Werkstoffe werden, je nach Anwendungszweck, Grauguß, gummierter Grauguß, Reinnickel, Nickel-Resist D4 oder Titan empfohlen. Zum Verdichten von Chlor-Gas lassen sich Flüssigkeitsringverdichter verwenden; zum Fördern von flüssigem Chlor haben sich zweistufige Spaltrohrmotorpumpen bewährt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330420709
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    Paper (German National Licenses)
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