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  • 2000-2004
  • 1985-1989  (6)
  • 1987  (6)
Material
Years
  • 2000-2004
  • 1985-1989  (6)
Year
  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 28 (1987), S. 2692-2696 
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: It is shown that there exist no physically significant solutions of the Einstein vacuum field equations, except the trivial one (i.e., Minkowski), for axially and reflection symmetric space-times (Bondi metric) admitting a one-parameter group of conformal motions globally defined on S2.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 44 (1987), S. 0 
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The fatty acids of 40 strains, representing 24 species, of rapid-growing mycobacteria were analysed by gas chromatography and mass spectrometry. Tuberculostearic acid and straight-chain fatty acids, ranging from 14 to 24 carbon atoms, were detected in all studied strains. Some strains were found to contain 2-methyl branched-chain acids: 2-methyl-2-octadecenoic acid was identified in Mycobacterium fortuitum, 2,4-dimethyl-2-eicosenoic acid in M. smegmatis and 2,4-dimethyl eicosanoic acid in M. tokaiense.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Mathematische Zeitschrift 196 (1987), S. 133-139 
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 22 (1987), S. 1623-1629 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The analyst of the thermally stimulated depolarization current (TSDC) spectrum of theα phase of polyvinilide fluoride (PVDF-α) by means of the thermal sampling technique permits a series of elementary peaks to b8 obtained. The relaxation associated withγ andβ transitions is usually assumed to be due to dipolar motions; however, the relaxation time of these processes when represented as a function of the temperature does not follow an Arrhenius law. The definition of a relaxation time describing the experimental relaxation process requires, in addition to the frequency factor 1/τ0 and the activation energyE, a third parameter,q, which we call the interaction parameter. These considerations lead to defining a relaxation time, which accounts for the dipolar interaction during the relaxation. This relaxation time has successfully described thedipo!orrelaxation in other materials. The evolution ofq, obtained from the elementary peaks of the TSDC spectrum of PVDF-α, leads to the assignment of three relaxation zones, which are in agreement with those reported by other authors, as being associated with the molecular motion in the different phases of PVDF-α.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical microbiology & infectious diseases 6 (1987), S. 729-731 
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Pentafluorobenzyl and pentafluoropropionyl/pentafluorobenzyl esters of bacterial fatty acids were analysed by capillary gas chromatography using both flame ionization and electron capture detection. No differences between the relative peak areas of the various fatty acids were observed as regards the two detectors used except that response of the electron capture detector to the hydroxy acid derivatives exceeded that to the non-hydroxy acid derivatives by 20%. Use of the described derivatives in combination with electron capture detection yields chromatograms comparable with those obtained by analysis of methyl esters using flame ionization detection but with superior sensitivity.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied climatology 38 (1987), S. 37-42 
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Es werden Daten der langwelligen atmosphärischen Strahlung bei Barcelona herangezogen, um verschiedene Methoden zur Bestimmung dieser Komponente der Strahlungsbilanz bei klarem Himmel zu vergleichen. Dazu werden zwei unterschiedliche Formeltypen, die analytischen nach Swinbank und Brutsaert (1 und 2) und empirische nach Brunt, Idso und Jackson sowie Idso (1 und 2) benützt. Von diesen Methoden wurden die meisten für einen bestimmten Ort entwickelt und verwenden daher lokale empirische Koeffizienten. Allerdings gibt es einige, die als allgemein verwendbar angesehen werden. Für beide Typen der Abschätzung ergeben sich für Lufttemperaturen über 0°C im Hüttenniveau ähnliche Werte. Bei Lufttemperaturen unter 0°C zeigen sich jedoch einige Unterschiede zwischen den beobachteten und geschätzten Werten der langwelligen atmosphärischen Strahlung. Das legt nahe, die Koeffizienten sowohl für die analytischen als auch die empirischen Formeln anzupassen. Leider war das auf Grund des geringen Datenmaterials bei Temperaturen unter 0°C innerhalb dieser Untersuchung nicht möglich.
    Notes: Summary Data from measurements of long-wave radiation at Barcelona were used to test the validity of several methods for computing this component of the radiation balance in clear sky conditions. Two types of formulae, the analytically derived formulae of Swinbank and Brutsaert 1 and 2 and the empirically obtained formulae of Brunt, Idso and Jackson and Idso 1 and 2 were used in the test. Most of these methods are derived for a particular location and utilize local empirical coefficients. However, there are several which have been considered more universal. Estimates by the two methods give approximately the same value when the screen level air temperature is above 0°C. In addition, the test for temperatures below 0°C shows several discrepancies between the observed and estimated values of long-wave atmospheric radiation. This fact suggests that modifications may be needed for both analytical and empirical formulae. However, since we have few measurements in the temperature regime below 0°C, this statement cannot be justified as a conclusion of this study.
    Type of Medium: Electronic Resource
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