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  • 1
    ISSN: 1279-8517
    Keywords: Angiography ; Technology ; Aortic arch
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé A partir d'une étude anatomique de 46 spécimens, les angles du tronc artériel brachio-céphalique droit et de l'artère sous-clavière gauche par rapport à la tangente à la crosse de l'aorte sont mesurés de façon à déterminer quelle voie permet l'accès le plus facile et le plus rapide à l'aorte descendante lors des angiographies des membres inférieurs en cas d'artériopathie sévère. L'étude montre que les angles moyens (77.1±16.0 degrés pour le tronc brachio-céphalique, 77.7±16.3 degrés pour l'artère sous-clavière gauche) ne sont pas significativement différents. Comme l'abord axillaire droit comporte plus de risques qui ne peuvent être contre-balancés que par un accès plus rapide, nous concluons que chez les patients de tous âges, le côté gauche droit être la voie d'accès de première intention.
    Notes: Summary In an anatomic study of 46 specimens, the angle of the brachiocephalic trunk and the left subclavian artery to the tangent of the aortic arch was measured in an effort to decide which route offers the quickest access to the descending aorta in lower extremity angiography for severe occlusive vascular diseases. The study shows that the average angles (77.1±16.0 degrees for the brachiocephalic trunk/77.7±16.3 degrees for the left subclavian artery) are not significantly different. Since the right axillary approach incurs other risks that could only be compensated by significantly quicker access, i.e. shorter maneuvering time in the aortic arch we conclude that in patients of all ages the left side should be the access route of choice.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 19 (1969), S. 570-571 
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 92 (1973), S. 359-363 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung In Fortsetzung der Untersuchungen von LaBach u. White (1969) sowie White et al. (1969) wurden die Sphingosin-Basen der anaeroben Bacteroides-Species B. fragilis, B. thetaiotaomicron und B. vulgatus charakterisiert. Die Basen wurden zunächst durch Perjodat-Oxidation zu Aldehyden abgebaut, diese in einem zweiten Schritt mit Silberoxid zu Fettsäuren oxidiert. Die entstandenen Fettsäuren wurden als Methylester direkt und nach Hydrierung gaschromatographisch identifiziert. Es bestätigte sich bei unseren drei Bacteroides-Species insgesamt die von B. melaninogenicus her bekannte Heterogenität der Basen. Demnach dürfte nachgewiesen sein, daß allgemein Angehörige des Genus Bacteroides verzweigte und geradkettige, z.T. auch ungesättigte Sphingosin-Basen mit 16-20 C-Atomen bilden können, die das Grundgerüst der von LaBach u. White beschriebenen Ceramide darstellen.
    Notes: Summary Following the investigations of LaBach and White (1969) and of White et al. (1969) we characterized the sphingolipid bases of the anaerobe Bacteroides species B. fragilis, B. thetaiotaomicron and B. vulgatus. The bases pooled and purified by column chromatography were reduced to aldehydes by sodium metaperiodate oxidation, and in a second step these aldehydes oxidized to fatty acids by silver oxide. The fatty acids obtained in this manner were esterified by diazomethane and identified directly and after hydrogenation by gasliquid-chromatography with the aid of test substances. We obtained eleven fatty acids corresponding to the following sphingolipid bases: 1. branched and n-hexadeca-sphinganine; 2. iso-, anteiso-branched and n-heptadeca-sphinganine; 3. iso-branched and n-octadeca-sphinganine; 4. iso- and anteiso-branched nonadeca-sphinganine; 5. eicosa-sphinganine; 6. eicosa-sphingenin. These results are in correspondence with the heterogeneity of the bases known from B. melaninogenicus. Therefore, we believe to have demonstrated that generally the members of the genus Bacteroides are able to synthesize branched and straightened saturated, sometimes also unsaturated sphingolipid bases with 16 to 20 Carbon units. These sphingolipid long chain bases are the spine of the ceramides described by LaBach and White.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Cell Differentiation and Development 27 (1989), S. 63 
    ISSN: 0922-3371
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Cryobiology 17 (1980), S. 597 
    ISSN: 0011-2240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Cryobiology 16 (1979), S. 607 
    ISSN: 0011-2240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Immunological reviews 29 (1976), S. 0 
    ISSN: 1600-065X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 254 (1975), S. 361-362 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FARRANT et al.1 have suggested that two separate processes determine the survival of cultured cells thawed from -196 C storage, namely a holding temperature of about -26 C preceding the subsequent storage temperature. We report that optimal recovery of cultured cells after freezing depends on an ...
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 4369-4371 
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In a first step toward generating an electron–positron plasma, a proof-of-principle experiment is reported in which externally injected slow positrons are trapped in a magnetic mirror configuration by electron cyclotron resonance heating. With a primary flux of only 530 slow positrons/s from a 600 μCi Na-22 positron source/moderator system, an estimated equilibrium density of 5×102 cm−3 is obtained in a 20 cm3 volume. With an appropriate increase of the injected positron flux, densities in the 107 cm−3 range can be expected. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 28 (1985), S. 3099-3106 
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The lifetime of energetic electrons generated via second harmonic electron-cyclotron-resonance heating in a symmetric magnetic mirror configuration is investigated experimentally. The decay time is observed to be as much as a factor of 4 shorter than the value calculated for the most rapid classical loss mechanism, Coulomb drag. The nonclassical loss component is shown to be induced by the microwave power available for electron heating. The microwave power required to sustain the temperature and density of the energetic electrons is calculated from the observed lifetimes and stored energy. It is found to be only a few percent of the total injected power which, in this experiment, is equal to or less than 1 kW.
    Type of Medium: Electronic Resource
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