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  • 1985-1989  (1)
  • 1970-1974  (1)
  • 1930-1934
  • 1987  (1)
  • 1974  (1)
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  • 1985-1989  (1)
  • 1970-1974  (1)
  • 1930-1934
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  • 1
    Electronic Resource
    Electronic Resource
    Feeding ecology of Oreochromis niloticus (Linnaeus) & Tilapia Zillii (Gervias) in a Nile canal (1987)
    Springer
    Hydrobiologia 146 (1987), S. 57-62 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Fish stomachs, 1149 for Tilapia zillii and 1698 for Oreochromis niloticus, were collected from April 1984 till April 1985 from a Nile canal in the Egyptian delta. Both species showed a significant overlap of diet (Schoener's index) among individuals ranging from 12 to 17.9 cm standard length. Outside this range differences in the importance of food of animal origin occurred. Macrophytes were the main food of O. niloticus and aquatic insects of the food of T. zillii. This initial diet overlap may have contributed to irregularity in the increase of full stomachs with increasing length, and to a decline of the stomach index (SI = stomach weight × 100/fish weight) with increase in length in O. niloticus. The stomach of either species correlated significantly with water temperature, but with daily photoperiod in O. niloticus only.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00007577
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Identification of an atypical constitutent of a clandestine opiate (1974)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 1 (1974), S. 350-351 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An unusual morphine analog was extracted and separated from an opium-like sample. The high resolution mass spectrum of the unknown substance confirmed the empirical formula as C17H18O2NCl. Mass spectra and retention factor values in thin-layer chromatography of both unknown and authentic standards were compared, which lead to the identification of the unknown as β-chloromorphide.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200010511
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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