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  • Chemistry  (2)
  • Quercus geminata  (2)
Document type
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Non-random distribution patterns of leaf miners on oak trees (1987)
    Springer
    Oecologia 74 (1987), S. 102-105 
    Details
    ISSN: 1432-1939
    Keywords: Leaf miner ; Stilbosis ; Oak trees ; Quercus geminata ; Mine distributions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Leaf-mining Stilbosis quadricustatella larvae are distributed non-randomly within leaves of their host plants, sand live oak (Quercus geminata) and water oak (Q. nigra) in north Florida. Fewer mines are found together on the same side of the mid-vein than separated, on opposite sides of the mid-vein. Larvae do not normally cross the mid-vein but create small blotch-like mines along subsidiary veins. Investigations of the usual mortality factors acting on these leaf-miner populations, including competition, parasitism, and predation revealed no significant differences in these factors between mines separated by the mid-vein and those on the same side of the leaf. However, early leaf abscission, which kills the larvae present in the leaf, occurs significantly more frequently in cases where larvae are clustered on one leaf side. The reasons for this differential leaf abscission are not yet clear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377352
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Non-random distribution patterns of leaf miners on oak trees (1987)
    Springer
    Oecologia 73 (1987), S. 116-119 
    Details
    ISSN: 1432-1939
    Keywords: Leaf miner ; Stilbosis ; Oak trees ; Quercus geminata ; Mine distributions ; Abscission
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Leaf-mining Stilbosis quadricustatella larvae are distributed non-randomly within leaves of their host plants, sand live oak (Quercus geminata) and water oak (Q. nigra), in north Florida. Fewer mines are found together on the same side of the mid-vein than separated, on opposite sides of the mid-vein. Larvae do not normally cross the mid-vein but create small blotch-like mines along subsidiary veins. Investigations of the usual mortality factors acting on these leaf-miner populations, including competition, parasitism, and predation, revealed no significant differences in these factors between mines separated by the mid-vein and those on the same side of the leaf. However, early leaf abscission, which kills the larvae present in the leaf, occurs significantly more frequently in cases where larvae are clustered on one leaf side. The reasons for this differential leaf abscission are not yet clear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00376986
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Small-angle x-ray scattering by poly-L-alanine solutions (1972)
    New York : Wiley-Blackwell
    Biopolymers 11 (1972), S. 679-682 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The radius of gyration and “persistence length” of poly-L-alanine, calculated from small-angle x-ray scattering data, have values of 56 Å and 44 Å, respectively, in dichloroacetic acid, and 78 Å and ∼30 Å in a 1:1 v/v mixture of trifluoroacetic acid and trifluoroethanol. This can be interpreted to mean that poly-L-alanine exists in a relatively rigid, predominantly α-helical conformation in dichloroacetic acid and in an extended, more flexible form in the mixed solvent system.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1972.360110313
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Intron/exon structure of the human gene for the muscle isozyme of glycogen phosphorylase (1987)
    New York, NY : Wiley-Blackwell
    Proteins: Structure, Function, and Genetics 2 (1987), S. 177-187 
    Details
    ISSN: 0887-3585
    Keywords: evolution ; protein structure ; nucleotide binding domain ; gene sequence ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: The intron/exon organization of the human gene for glycogen phosphorylase has been determined. The segments of the polypeptide chain that corresponds to the 19 exons of the gene are examined for relationships between the three-dimensional structure to the protein and gene structure. Only weak correlations are observed between domains of phosphorylase and exons. The nucleotide binding domains that are found in phosphorylase and other glycolytic enzymes are examined for relationships between exons of the genes and structures of the domains. When mapped to the three-dimensional structures, the intron/exon boundaries are shown to be widely distributed in this family of protein domains.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prot.340020303
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    Paper (German National Licenses)
    Fulltext
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