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  • Electronic Resource  (2)
  • 1975-1979  (2)
  • 2-Hydroxyhexadecanoic acid  (1)
  • Biochemistry
  • Drosophila persimilis
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 115 (1977), S. 353-357 
    ISSN: 1432-072X
    Keywords: Acetobacter xylinum ; glycogen ; Lipopolysaccharide ; Mannan ; Cellulose ; 2-Hydroxyhexadecanoic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A cellular phenol-water extract of Acetobacter xylinum NRC 17007 was fractionated on Sepharose 4 B. The fraction eluting with the void volume consisted to about 95% of glycogen-like material. The lipopolysaccharide fraction was of lower molecular weight and had the following composition (%, w/w): Mannose, 42; glucose, 7; galactose, 3.8; heptose, 2; 2-keto-3-deoxy-octonate, 1.2; glucosamine, 3.3; phosphate, 4.5; total fatty acids, 3.9. Among the fatty acids, 3-hydroxy-tetradecanoic acid was present, and 2-hydroxy-hexadecanoic acid predominated.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-3297
    Keywords: Drosophila pseudoobscura ; Drosophila persimilis ; phototaxis ; intrapopulation variation ; behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract The photoresponses of natural populations ofD. pseudoobscura andD. persimilis, occurring sympatrically, are measured in two environmental conditions (“at rest” and “disturbed”). Comparisons of the responses, intraspecifically and interspecifically, lead to the following conclusions. These must be considered within the confines of the operational nature of the measurement of laboratory photoresponses. (1) Within each species population, significant nonenvironmental differentiation has been allowed or produced by selection in the “at rest” photoresponse. No significant nonenvironmental differentiation is found in the photoresponse measured in a disturbed condition. (2) Within each species population, a higher mean “disturbed” photoresponse has been favored. The intensities or patterns of selection acting on these two photoresponses have differed such that more intrapopulation differentiation has been allowed or produced in the “at rest” photoresponse. (3) A higher mean photoresponse has been favored inD. persimilis for both conditions. The intensities or patterns of selection acting between these two species populations on the “at rest” photoresponse have differed such that more intrapopulation differentiation has been allowed or produced inD. persimilis. (4) Comparisons of this study with one on intraspecific and interspecific differentiaiton in wing length lead to the conclusion that the selective differences inferred above have acted at a level more specifically attuned to photobehavior.
    Type of Medium: Electronic Resource
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