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  • Articles: DFG German National Licenses  (3)
  • 1995-1999  (1)
  • 1950-1954  (2)
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  • Articles: DFG German National Licenses  (3)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 10 (1954), S. 185-187 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Im Skelett vonKatsuwonus pelamis kommt vereinzelt ein blaugrünes Pigment vor, dessen Verteilung im Endoskelett beschrieben wird. Das Pigment kann mit saurem Methanol extrahiert und in Chloroform übergeführt werden. Die saure Methanollösung des Pigments zeigt Absorptionsmaxima bei 680–690 und 370 mµ, die Chloroformlösung bei 660 und 380 mµ. Sowohl trockene Filme des Pigments als auch die Chloroformlösung geben eine positive Gmelinsche Reaktion, und der oxydierte, in ammoniakalischem Äthanol gelöste Zinkkomplex des Pigments zeigt im ultravioletten Licht eine intensive rote Fluoreszens und Absorptionsmaxima bei 590 und 640 mµ. Das Pigment besitzt somit die Eigenschaften eines Bilitrientetrapyrrol und ähnelt weitgehend dem Biliverdin.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 169 (1952), S. 629-630 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As there appears to be little information available on the control of wheat midge, it may perhaps be worth recording the following observations. In late June it was observed that the midge population in the nursery plots of wheat at the Cereal Station, Ballinacurra, Co. Cork, was very high. ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Engineering with computers 15 (1999), S. 345-355 
    ISSN: 1435-5663
    Keywords: Key words. Genetic algorithm; Heuristics; Optimisation; Truss design
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract. A heuristic method of seeding the initial population of a Genetic Algorithm (GA) is described, which enables better solutions to discrete truss optimisation problems to be found within a shorter time period, and with a negligible increase in computational effort (compared with the simple GA). The seeding method is entirely automatic, and makes use of the problem-specific routines used to calculate fitness, already present within the GA. The GA models natural, biological evolution as a means of producing a ‘good’ solution to a problem. The GA described here is implemented in various versions. The differences between each version are in the selection procedure and/or the generation of the initial population. To compare the effectiveness of each strategy the GA variants are applied to four example problems.
    Type of Medium: Electronic Resource
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