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  • amylase  (2)
  • 35.10  (1)
  • Springer  (3)
  • Cell Press
  • Springer Nature
  • 1985-1989  (3)
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  • Springer  (3)
  • Cell Press
  • Springer Nature
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  • 1
    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
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  • 2
    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
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 10 (1988), S. 145-151 
    ISSN: 1434-6079
    Keywords: 35.10
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An atomic beam deflection experiment is described which establishes upper limits to the electrical charges of potassium and cesium atoms ofq(K)〈2.4×10−18 q e andq(Cs)〈3.0×10−18 q e at the 90% confidence level, in whichq e is the electron charge magnitude. If we assume that the electron neutrino charge is zero and that charge conservation holds in neutron beta decay, then the difference δq in the electron and proton charge magnitudes has the upper limit δq〈1.3×10−20 q e at the 90% confidence level. The possibility of a more sensitive atomic beam deflection experiment using a laser-cooled atomic beam is suggested. A brief review of the topic of the electrical neutrality of atoms is given.
    Type of Medium: Electronic Resource
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