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  • chicken  (2)
  • ASTROPHYSICS  (1)
  • 2000-2004
  • 1985-1989  (3)
  • 1970-1974
  • 1988  (3)
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  • 2000-2004
  • 1985-1989  (3)
  • 1970-1974
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  • 1
    Electronic Resource
    Electronic Resource
    The amylase gene-enzyme system of chickens. I. Allozymic and activity variation (1988)
    Springer
    Biochemical genetics 26 (1988), S. 747-755 
    Details
    ISSN: 1573-4927
    Keywords: amylase ; chicken ; variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Amylase allozymic and activity variation was studied in three flocks of chickens (Gallus domesticus). Individuals from one flock were studied to assess the effects of sex, tissue, and genotype on amylase activity. Additionally, the allozymes were purified and their specific activities compared. Variation was observed within and among the flocks. Two alleles were found to be segregating in the flocks, one flock being polymorphic and the other two monomorphic. Mean amylase activities among the three flocks were significantly different. The relationship of this activity variation to regulatory variation is discussed. There were no significant effects of sex or genotype on amylase activity and, in most cases, no correlation between activities in the various tissues. However, in heterozygotes one of the alloamylases had much lower activity than the other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553873
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The amylase gene-enzyme system of chickens. I. Allozymic and activity variation (1988)
    Springer
    Biochemical genetics 26 (1988), S. 747-755 
    Details
    ISSN: 1573-4927
    Keywords: amylase ; chicken ; variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Amylase allozymic and activity variation was studied in three flocks of chickens (Gallus domesticus). Individuals from one flock were studied to assess the effects of sex, tissue, and genotype on amylase activity. Additionally, the allozymes were purified and their specific activities compared. Variation was observed within and among the flocks. Two alleles were found to be segregating in the flocks, one flock being polymorphic and the other two monomorphic. Mean amylase activities among the three flocks were significantly different. The relationship of this activity variation to regulatory variation is discussed. There were no significant effects of sex or genotype on amylase activity and, in most cases, no correlation between activities in the various tissues. However, in heterozygotes one of the alloamylases had much lower activity than the other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02395520
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Unknown
    Measurements of the gas temperature and iron abundance distribution in the Coma Cluster (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: The medium energy X-ray detectors onboard the EXOSAT Observatory have been used to determine the gas temperature at several positions in the Coma Cluster of galaxies. Evidence is found at greater than 95 percent confidence for a higher temperature in the center of the cluster than in a position approximately 45 arcmin off-center. No difference in iron abundance is observed between the center and off-center regions and the equilibrium model for the distribution of elements in the Coma Cluster of Abramopoulos, Chanan, and Ku can be rejected with greater than 99.5 percent confidence, in favor of a model with more uniform composition. A phenomenological model is presented of the Coma Cluster, which is consistent with the data presented here, as well as the imaging data from the Einstein Observatory and the Tenma X-ray spectrum. The model has a central isothermal region of temperature about 9 keV extending to about 25 arcmin (about 1 Mpc). Beyond this radius the temperature falls as a polytrope with index about 1.6.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 329; 82-96
    Format: text
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