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  • Springer  (177.357)
  • American Chemical Society  (98.102)
  • American Institute of Physics  (26.931)
  • 1970-1974  (302.390)
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  • 1
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    Deep-Sea Carbonates (1974)
    Springer
    Details
    Publikationsdatum: 2023-11-24
    Beschreibung: Calcium carbonate in sediments can greatly effect the engineering properties of those sediments. Factors that may effect engineering properties are: 1) great variation in primary void ratios, (2) inherent strength of carbonate grains, (3) degree of sorting, (4) ratio between grains and matrix, (5) nature and amount of cement, and (6) depth of burial. Deep-sea carbonates appear to be anomalous but do exist in rather large quantities. Their existence must depend upon a combination of physico-chemical and organic-chemical factors that need to be investigated in much more detail.
    Materialart: Book chapter , NonPeerReviewed
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OCEANREP)
  • 2
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    Untermeerische mineralische Rohstoffe in den Ozeanen (1974)
    Springer
    Details
    Publikationsdatum: 2022-03-10
    Beschreibung: Mineral resources on and beneath the seafloor are briefly reviewed and the present and future economic value of specific mineral resources is discussed. The results obtained from the cruises of the German research vessel "Valdivia" during its first three years of operation are presented.
    Materialart: Article , PeerReviewed
    Format: text
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  • 3
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    Reproductive biology and embryonic development of Eledone cirrosa (Cephalopoda: Octopoda) (1971)
    Springer
    In:  Marine Biology, 8 . pp. 109-117.
    Details
    Publikationsdatum: 2020-11-05
    Beschreibung: Analyses of bottom trawl samples and feeding experiments in the laboratory revealed a reproduction period ranging from late March to early August in Eledone cirrosa of the Catalonian Sea (Western Mediterranean). The embryonic development, studied for the first time on eggs laid in the laboratory, shows no basic difference from that of other Octopodiae. The newly hatched animals are planctonic; Morphologically, this feature is expressed by a relatively small arm-length.
    Materialart: Article , PeerReviewed
    Format: text
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  • 4
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    Laboratory rearing of Sepiolinae (Mollusca: cephalopoda) (1971)
    Springer
    In:  Marine Biology, 8 . pp. 82-87.
    Details
    Publikationsdatum: 2020-11-05
    Beschreibung: Five species of Sepiola were reared in the laboratory from egg to adult size. Spawning was achieved in 3 species of Sepiola afteer 5 to 7 months. The growth rate of the species reared did not depend upon temperature, which ranged from 12,5° to 20°C. A fairly constant size increase (2,5mm mantle length/month) was observed in Sepiola during the 5 months after hatching. In Sepietta, the same growth rate was observed until the fourth month after hatching, when it increased to the rate of 5 mm mantle length/month.
    Materialart: Article , PeerReviewed
    Format: text
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  • 5
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    New data on reproductive biology and growth of Octopus vulgaris (1973)
    Springer
    In:  Marine Biology, 19 . pp. 7-12.
    Details
    Publikationsdatum: 2020-11-05
    Beschreibung: The problems of reproduction of Octopus vulgaris and the seasonal distribution in the sea of planctonic larvae, benthonic juveniles and adults are discussed. The influence of environmental factors on growth is shown by experimental studies in the laboratory, and the difficulties of interpreting field data are emphazised.
    Materialart: Article , PeerReviewed
    Format: text
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  • 6
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    New equation for the speed of sound in natural waters (with comparisons to other equations) (1974)
    American Institute of Physics
    In:  Journal of the Acoustical Society of America, 56 (4). p. 1084.
    Details
    Publikationsdatum: 2020-07-16
    Beschreibung: A new equation for the speed of sound in sea water has been developed with validity not only for realistic combinations of the parameters salinity, temperature, and pressure, but with extension to pure water as well. This new equation, referred to as NRL II, has a standard deviation of 0.05 m/sec. Tables are presented comparing calculations using this new model to each of eight earlier equations. Graphs are also included indicating approximate corrections that could be applied to existing sound speed profiles, but it is recommended that such profiles be recalculated and new ones obtained according to NRL II.
    Materialart: Article , PeerReviewed
    Format: text
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  • 7
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    The culture and maintenance of the loliginid squids Sepioteuthis sepioidea and Doryteuthis plei (1971)
    Springer
    In:  Marine Biology, 9 (1). pp. 9-25.
    Details
    Publikationsdatum: 2020-07-14
    Beschreibung: A technique for rearing the loliginid squids Sepioteuthis sepioidea and Doryteuthis plei is reported. Specimens of the former were reared from eggs to sexually mature adults, and maintained for a maximum of 146 days; adult D. plei were maintained for 38 days. Choice and quantity of food was most important for the survival of all sizes, particularly young squid. Newly hatched specimens thrived on Mysidium columbiae. Both species fed at a rate of 30 to 60% of their body weight daily; starvation occurred when intake fell below 10 to 15%. Food conversion efficiency averaged between 10 to 20%. Growth was rapid and steady. S. sepioidea grew to a maximum of 105 mm and 77 g in less than 5 months; D. plei grew an estimated 20 mm/month. Experimental data indicate a lethal minimum salinity for both species at about 27‰. Lethal minimum and maximum temperatures for young S. sepioidea are 17.5° to 18.0°C, and 32.5° to 33.0°C, respectively. Young consume 0.64μl O2/mg wet weight/h. Opaque tanks, with a semi-natural bottom substrate and special ultra-violet (UV) illumination, are advantageous for rearing and maintenance.
    Materialart: Article , PeerReviewed
    Format: text
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  • 8
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    The distribution of heavy metals in sediments of Sörfjord, West Norway (1972)
    Springer
    In:  Water, Air, and Soil Pollution, 1 (4). pp. 452-461.
    Details
    Publikationsdatum: 2020-04-28
    Beschreibung: The bottom sediments of Sörfjord, West Norway, contain unusually high concentrations of Ag, Ba, Bi, Cd, Cu, In, Pb, Sb, Sn, and Zn. The concentrations of Zn and Pb reach ∼ 10% by weight in some sediments. The concentrations of most of the elements are positively correlated, those of Pb, Cd, and Cu with Zn being particularly well developed; correlations also exist between Sb and Zn, and Ag and Cu. The concentrations of the metals in the bottom sediments decrease southwards and northwards from a locality close to a source of industrial waste.
    Materialart: Article , PeerReviewed
    Format: text
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  • 9
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    Wasserhaushalt und Strömungen (1974)
    Springer
    In:  In: Meereskunde der Ostsee. , ed. by Magaard, L. and Rheinheimer, G. Springer, Berlin, pp. 33-41.
    Details
    Publikationsdatum: 2019-09-23
    Materialart: Book chapter , NonPeerReviewed
    Format: text
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  • 10
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    Die Ergochrome (Physiologie, Isolierung, Struktur und Biosynthese) (1973)
    Springer
    In:  Fortschritte der Chemie organischer Naturstoffe, 30 . pp. 151-206.
    Details
    Publikationsdatum: 2018-04-11
    Beschreibung: Mutterkorn, das Dauermycel des auf Roggenähren wuchernden Fadenpilzes Claviceps purpurea, enthält eine Gruppe hellgelber, schwach saurer, optisch aktiver Farbstoffe. Obwohl die ersten Präparate dieser Farbstoffe schon vor fast 100 Jahren von DRAGENDORFF und Mitarb. (14) isoliert wurden, konnte deren Strukturaufklärung im wesentlichen erst in den letzten Jahren durchgeführt werden. Dies ist darauf zurückzuführen, daß für die Reindarstellung der schwer trennbaren, teilweise diastereomeren Farbstoffe leistungsfähige chromatographische Methoden entwickelt werden mußten (1, 27, 29, 47). Als sich gezeigt hatte, daß diese Farbstoffe eine Naturstoffgruppe aus mehr als 10 Vertretern mit sehr ähnlichen Strukturen bilden, wurde für sie der Sammelname Ergochrome und eine einfache Nomenklatur vorgeschlagen (19, 25, 29).
    Materialart: Article , PeerReviewed
    Format: text
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