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  • Coleoptera  (5)
  • RNA  (4)
  • Springer  (9)
  • EDP Sciences
  • 2005-2009
  • 1980-1984  (9)
  • 1965-1969
  • 2008
  • 2007
  • 1980  (9)
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Publisher
  • Springer  (9)
  • EDP Sciences
Years
  • 2005-2009
  • 1980-1984  (9)
  • 1965-1969
Year
  • 1
    ISSN: 1432-2048
    Keywords: Legumin ; Pisum ; Protien synthesis ; RNA ; Storage protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Evidence is presented to show that legumin, the major storage protein in Pisum, is synthesised in vitro by the wheat germ and reticulocyte lysate systems, from polyribosomes and mRNA isolated from developing pea seeds. While legumin isolated from mature pea seeds consists of 40,000 and 20,000 MW subunits, the in vitro legumin is synthesised as a 60,000 MW precursor consisting of covalently linked 40,000 and 20,000 MW subunits. The implications of these findings are discussed in relationship to studies with other systems.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Biochemical genetics 18 (1980), S. 743-753 
    ISSN: 1573-4927
    Keywords: RNase-senitive DNA polymerase activity ; RNA ; DNA ; Neurospora crassa ; differential DNA polymerase activity ; cell fractions and mutants of N. crassa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract RNase-sensitive DNA polymerase activity (RSDP) was tested in different cell fractions of Neurospora crassa cell types and its morphological mutants. This RSDP was found localized in the microsomal pellet fraction and absent in the purified nuclear pellets isolated from different N. crassa cell types: conidia, germinated conidia, and mycelia. This enzyme is capable of synthesizing a DNA product only in the presence of all four deoxyribonucleoside-5′-triphosphates and Mg2+. Removal of RNA from the pellet fraction by RNase strongly inhibited the DNA synthesis. The endogenous synthesis of DNA in the microsomal pellet fraction was associated with the formation of an RNA:DNA hybrid as analyzed by Cs2SO4 equilibrium density gradient centrifugation. The DNA product after alkali hydrolysis hybridizes with the RNA isolated from the same pellet fraction, as analyzed by elution from hydroxylapatite column at 60 C. This DNA product did not hybridize with poly(A). A few mutants tested showed this RNase-sensitive DNA polymerase activity.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-1561
    Keywords: Gnathotrichus retusus ; G. sulcatus ; Coleoptera ; Scolytidae ; ambrosia beetle ; aggregation pheromone ; 6-methyl-5-hepten-2-ol ; sulcatol ; reproductive isolation ; enantiomers ; chiral compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The aggregation pheromone ofGnathotrichus retusus was isolated and identified as (S)-(+)-sulcatol (6-methyl-5-hepten-2-ol). In laboratory and field experiments,G. retusus responded to (S)-(+)-sulcatol, but not to (±)-sulcatol, which was attractive to the sympatric species,G. sulcatus. G. sulcatus did not respond to optically pure (S)-(+)-sulcatol, but began to respond when ⩾ 1% (R)-(−)-sulcatol was present in an enantiomeric mixture.
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  • 4
    ISSN: 1573-1561
    Keywords: Ponderosa pine mortality ; Dendroctonus brevicomis ; Coleoptera ; Scolytidae ; aerial photography ; detection ; estimation ; sampling ; mapping ; attractive pheromones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Sequential aerial photography was used to detect ponderosa pine trees killed by successive generations of the western pine beetle (WPB),Dendroctonus brevicomis Lec., over a three-year period during a study to evaluate the effectiveness of attractive pheromones for the suppression and survey of WPB. The total number of WPB-killed trees were estimated for each generation, using probability-proportional-to-size sampling procedures. Infested trees at the beginning of the suppression treatment totaled 283. Attacks by three successive WPB generations in 1970 killed 90,83, and 91 trees, respectively. The first generation in 1971 killed 47 trees and the two subsequent generations combined killed a total of 49 trees. During the suppression treatment, tree mortality was concentrated into the suppression plots in comparison to the check plots and the surrounding area. By 1972, tree mortality distribution returned to its original pattern, but at one-tenth the original level, as shown by maps. Recommendations suggest ways to improve the use of aerial photography for studies of WPB-caused tree mortality and population dynamics.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of experimental biology and medicine 90 (1980), S. 1455-1457 
    ISSN: 1573-8221
    Keywords: neuron ; glia ; RNA ; visual and motor cortex ; visual deprivation ; photic stimulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
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  • 6
    ISSN: 1573-1561
    Keywords: Coleoptera ; Scolytidae ; bark beetle ; Dendrocionus ; Ips ; pheromone ; colonization ; attraction ; inhibition ; behavioral interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Chemically mediated behavioral interactions among four species of Scolytidae cohabitingPinus taeda in east Texas appear to be significant in delineating breeding areas within trees and in influencing the sequence of colonization.Dendroctonus frontalis usually arrived first and was not attracted to logs occupied by any of the threeIps species (I. avulsus, I. calligraphus, andI. grandicollis). The response ofI. avulsus to conspecific males was enhanced by the simultaneous presence of actively boring maleI. grandicollis. The response ofIps calligraphus was inhibited in areas whereI. avulsus was also present, but, in turn,I. calligraphus inhibited the response ofI. grandicollis and attractedI. avulsus. Ips grandicollis was strongly inhibited by the simultaneous presence of femaleD. frontalis or maleI. calligraphus, and in turn, maleI. grandicollis inhibitedD. frontalis. The result of this highly interactive olfactory system is that host trees are colonized very rapidly and that, in the process, disadvantageous reproductive interactions are minimized.
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  • 7
    ISSN: 1573-1561
    Keywords: Pinus ponderosa ; Dendroctonus brevicomis ; Temnochila chlorodia ; pheromone ; kairomone ; exo-bievicomm ; frontalin ; trans-ver-benol ; verbenone ; terpenes ; Coleoptera ; Scolytidae ; Trogositidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The responses of the western pine beetle (Dendroctonus brev-icomis LeConte) andTemnochila chlorodia (Mannerheim) to candidate attractants—exo- andendo-brevicomm, frontalin,trans-verbenol, ver-benone, and ponderosa pine turpentine and its major monoterpene components—were quantified by counts of beetles on traps baited with the various attractants, singly and in combinations released simultaneously. Combinations ofexo-brevicomin and frontalin plus a monoterpene or turpentine were the most attractive toD. brevicomis. The responses to these attractant combinations were reduced when verbenone plustrans-verbenol were present. All single compounds and binary mixtures, exceptexo-brevicomin plus frontalin, were much less attractive.exo-Brevicomin was most attractive toT. chlorodia, and this response appeared to decrease when verbenone plustrans-verbenol were present.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-1561
    Keywords: Pinus ponderosa ; Dendroctonus brevicomis ; verbenone ; trans-verbenol ; tree protection ; bark beetle ; pheromones ; interruptant ; Coleoptera ; Scolytidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Verbenone andtrans-verbenol were investigated as candidate interruptants for use as tree protectants. Verbenone andtrans-verbenol, pheromones released byDendroctonus brevicomis during host colonization, reduced the trap catch ofD. brevicomis near sources of the attractant composed ofexo-brevicomm, frontalin, and myrcene. Catch reduction at some trap positions was greater at a high release rate than at a low release rate oftrans-verbenol alone and of the combination of verbenone plustrans-verbenol. Verbenone also reduced catches at traps baited with attractive bolts from trees under attack byD. brevicomis. Attempts to use verbenone to protect living trees fromD. brevicomis attack were inconclusive.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of experimental biology and medicine 89 (1980), S. 142-144 
    ISSN: 1573-8221
    Keywords: cycloheximide ; protein synthesis ; RNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Injection of cycloheximide into rats was shown not to change the acid and alkaline ribonuclease (RNase) activity in the cytoplasm of liver cells. Meanwhile inhibition of protein synthesis by cycloheximide led to a decrease in RNase activity of microsomes and membrane-bound polysomes. RNase activity of free polysomes in liver cells was considerably increased after administration of cycloheximide.
    Type of Medium: Electronic Resource
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