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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 3 (1987), S. 0 
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A total of 4450 tagged two and three years old salmon smolt were released into the River Drawa. Tagged salmon was caught mainly in central Baltic. Downstream migrating smolt were caught in lower Oder River till mid-May, and in the Szczecin Firth till the first decade of June. After reaching the sea, the tagged salmon migrated northeastward. They remained most of all in the central Baltic and were mainly caught near Gotland. In autumn of the third year after the release salmon were present on the spawning grounds. The fish attained an average of 58.2 cm and 1892g after the first year of sea life, 78.0 cm and 5329g after the second year, and 98.5cm and 9100g after the third year. Most of the tagged Drawa salmon were caught by Danish (44.7%) and Swedish (25.9%) fishermen.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Spectrochimica Acta 9 (1957), S. 227-234 
    ISSN: 0371-1951
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and mathematical physics 39 (1979), S. 398-401 
    ISSN: 1573-9333
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 743-752 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Studies on UV/Vis Absorption Spectra of Azo Dyes. VI. The Effect of Substituents on the Color of Derivatives of 1-Phenylazo-2-naphtholsThe absorption spectrum of 1-(4′-diethylaminophenylazo)-2-naphthol has been examined, and it has been found that the absorption band at 510 nm corresponds to the azo form and the shoulder at 610 nm corresponds to the hydrazone tautomeric form. Substituents in 3-position of 2-naphthol which have a free proton (e.g. OH, COOH, CONHR) stabilize the hydrazone tautomeric form by an intramolecular hydrogen bonding between substituent and hydrazone oxygen. Substituents which have not a free proton (e.g. OCH3, COOCH3, CONR1R2) have little influence on the absorption spectrum.The relative intensities of the two bands of the tautomeric forms are dependent on:  -  the electron attracting or electron releasing effect of the substituent R in CONHR -  the hydrogen bonding acidity of the substituents in 2′-position if R in CONHR is a phenylring -  the hydrogen bonding acidity of the solvent.The effect of substituents in the phenylazo subsystem is also discussed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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