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  • 1985-1989  (4)
  • 1955-1959
  • 1935-1939
  • 1988  (4)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 110 (1988), S. 7647-7651 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 7 (1988), S. 301-307 
    ISSN: 1434-6079
    Keywords: 32.30.Rj ; 32.80.Hd ; 34.80.Dp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on the first determination ofL-subshell fluorescence yields, ωLi, for various elements with 28≤Z≤47. The method applied is based on the subshell ionization by relativistic electron impact with an electron energy ofE 0=50 keV and the detection of characteristic X rays by means of a high resolution crystal spectrometer calibrated absolutely with respect to its transmission and reflectivity. The number of initialL vacancies and its subshell distribution as well as the normalized X-ray transition probabilities, the Coster-Kronig yields and theK-shell Auger transition rates are taken from theory. The results obtained for ωLi yield values that are for all three subshells in agreement with the predictions of a widely used semi-empirical formula and for ω L2 and ω L3 also with theoretical calculations. The values of ω L1, however, exceed the theory systematically.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-8248
    Keywords: Spodoptera frugiperda ; nuclear polyhedrosis virus ; resistance ; Spodoptera frugiperda ; virus de la polyédrose nucléaire ; résistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Les doses léthales moyennes (DL 50) du virus de la polyédrose nucléaire (NPV) ont été déterminées dans la descendance néo-natale de larves deSpodoptera frugiperda (J. E. Smith) capturées au Sud-Est de la Louisiane en 1981, 1982 et 1984. Ces doses moyennes léthales (DL 50) variaient de 1,8 à 16,3 corps d'inclusion polyédriques par insectes (PIB/Insect). Les DL 50 augmentaient significativement (P〈0,05) durant la saison 1982, mais ne présentaient aucune tendance régulière ni en 1981 ni en 1984. Cependant, les populations deS. frugiperda accroissaient l'hétérogénéité de leur réaction au virus de la polyédrose nucléaire durant les 3 années. La DL 50 augmentait de 4,1 à 18,7 PIB/insecte dans une colonie deS. frugiperda exposée au virus de la polyédrose nucléaire (DL 50) durant 7 générations, tandis que dans une colonie témoin non exposée au virus, la DL 50 était de 5,9 PIB/insect après 7 générations.
    Notes: Abstract Median lethal doses (LD50s) of nuclear polyhedrosis virus (NPV) were determined in neonatal offspring ofSpodoptera frugiperda (J. E. Smith) (Sf) larvae captured in southeastern Louisiana in 1981, 1982, and 1984. These LD50s ranged from 1.8 to 16.3 polyhedral inclusion bodies (PIB)/insect. The LD50s significantly (P〈0.05) increased during the season of 1982 but had no pattern in 1981 or 1984. However, the Sf populations increased in heterogeneity of response to the NPV during all 3 years. The LD50 increased from 4.1 to 18.7 PIB/insect in a Sf laboratory colony exposed to the NPV LD80 for 7 generations, whereas in a control colony not exposed to NPV the LD50 was 5.9 PIB/insect after 7 generations.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Heterocyclic Substituted Arendiazonium Salts with a Long-wave-length Range of Sensitivity  -  Part I: Monomethins and AzamethinsTwo new types of arendiazonium salts have been synthesized. In these compounds a heterocycliden ring is bridged through a methine group (8a-o) or a nitrogen (11a-c) with the 4-position of a benzene diazonium group.Both types show sensitivity towards normal day-light, their long wave-length absorption band vary from 430 nm up to 590 nm, depending on the donor strength of the heterocycliden ring and the nature of the bridging group.The thermostability, the quantum yields of photochemical dediazonation and the coupling behaviour of the diazonium salts are investigated, in order to evaluate their potential applicability in a commercial diazotype system.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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