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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Astrophysics and space science 205 (1993), S. 57-63 
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present spectroscopic evolutionary synthesis calculations for starburst galaxies of various metallicities in order to model the broad emission lines HeII λ4686 and CIII λ4650 produced by Wolf-Rayet (WR) stars in the spectra of WR galaxies. The strengths of both lines strongly decrease with decreasing metallicity. The presence of WR emission features is a clear indicator of very recent star formation less than 4 to 7 × 106 yr ago. Bursts of duration 1 to 5 × 106 yr which lead to an increase in the total stellar mass in the galaxy by 0.1 to 10 % are compatible with the equivalent width of Hell »4686 observed in WR galaxies.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-1536
    Keywords: Monomolecular films, single and mixed ; film pressure ; film potential ; spreading techniques ; lipids and phospholipids ; mixing properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Using both spreading techniques — mixed spreading and separate spreading- and, simultaneously, film pressure and film potential measurements, the mixing behavior of the following five binary systems was investigated and compared: 1) system 1,2-dilauroyl-phosphatidylethanolamine/cholesterol; 2) system 1,2-dimyristoyl-phosphatidylethanolamine/cholesterol; 3) system 1,2-dipalmitoyl-phosphatidylethanolamine/cholesterol; 4) system Na-eicosyl sulphate/hexadecanol; 5) system phosphatidic acid/1,2-dimyristoyl-phosphatidylethanolamine. Analyzing the time and concentration dependence of the π/a isotherms and Δv/a isotherms (πs = film pressure, Δv s potential,a=average area per molecule in mixed films in the monolayers) of the binary monolayers it can be concluded that the components of the binary systems 1–4 are complete miscible in the monolayers. On the other hand the components of the system 5 are probably partially miscible only.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1435-1536
    Keywords: Monolayer ; filmpotential ; filmpressure ; ioninteraction ; filmcondensation ; phospholipids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The interaction of ions (Na+, K+, Li+, Ca2+) with monolayers of phosphatidic acid alkyl esters (alkyl = methyl, ethyl,n-propyl,n-pentyl) were investigated at the air/water interface on Tris-HCl buffer, as well as on the electrolytes containing subphases. Qualitatively it can be stated that there are no considerable interactions between Na+ ions in the substrate and the head groups of phosphatidic acid esters in the monolayers. On the whole, the modification of the shape in the π/a and Δv/a isotherms (π s = film pressure, Δv s = film potential) of the homologous phosphatidic acid esters as a function of the length of the ester group on the subphase containing NaCl, KCl, and LiCl corresponds to that on Tris-HCl buffer without admixture of electrolytes. On the other hand the strength of interaction between Ca2+ ions and the homologous phosphatidic acid esters depends on the length of the ester group. The “film-condensing effect” of Ca2+ ions becomes smaller with increasing length of the ester group.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neurology 239 (1992), S. 355-355 
    ISSN: 1432-1459
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1459
    Keywords: Acute neuroborreliosis ; Chronic neuroborreliosis ; Central nervous system ; Magnetic resonance imaging ; HLA studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Of the 96 serologically confirmed neuroborreliosis cases seen in our clinic between 1983 and 1988, 11 patients had mild to moderate and 4 patients had serious cerebral and/or spinal cord symptoms. Nine of these 15 patients with CNS involvement exhibited a primary chronic course of the illness. After high-dose intravenous therapy with penicillin, doxycycline or cefotaxime, given mostly in combination with cortisone, gradual recovery occurred with normalization of CSF findings characteristic of neuroborreliosis, and normalization of significantly elevated Borrelia burgdorferi IgG antibody titres in CSF and serum. Brain MRI and CT showed evidence of or were suggestive of vascular involvement which correlated with clinical symptoms in 11 of the 15 patients with CNS involvement. Brain MRI changes that were similar but much slighter in number and intensity were seen in 5 of 12 neuroborreliosis patients without clinical signs of CNS involvement (lymphocytic meningoradiculitis; Bannwarth's syndrome). The frequencies of the HLA-DR7 (75%), HLA-B44 (50%) and HLA-A29 (33%) antigens in 12 neuroborreliosis patients with clinical symptoms of CNS involvement were significantly different from the frequencies in 12 neuroborreliosis patients without CNS involvement and in 100 control subjects. Diagnostic criteria of active neuroborreliosis are proposed.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 79 (1992), S. 479-480 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 44 (1990), S. 8-12 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Verlaufsuntersuchungen von 56 Patienten, die vor fünf bis 23 Jahren an einer antibiotisch nicht behandelten, akuten monophasischen Neuroborreliose erkrankt waren, zeigten signifikant positive IgG-Antikörpertiter fürBorrelia burgdorferi im Serum und Liquor von 20 Patienten (IFT, ELISA,B. burgdorferi-spezifischer IgG-Westernblot,B. burgdorferi-spezifischer IEF-IgG-Immunoblot). Neun von zehn getesteten Patienten wiesen eine signifikant positive T-Zellproliferationsantwort gegenüber dem gesamtenB. burgdorferi-Antigen mit einem mittleren (±SEM) Stimulationsindex von 7.2±1.8 auf. Da die untersuchten Patienten keine oder nur leichte bis mittelgradige Residualsymptome ohne irgendeinen Hinweis auf eine chronisch-progressive Krankheit hatten, interpretierten wir die Langzeit-Persistenz der spezifischen T- und B-Lymphozytenantworten fürB. burgdorferi als ein “immunologisches Narbensyndrom”. Abschließend werden diagnostische Kriterien der aktiven Neuroborreliose vorgeschlagen.
    Notes: Summary Follow-up studies on 56 patients who suffered from antibiotically untreated, acute, monophasic neuroborreliosis five to 23 years ago revealed significant positive levels of IgG antibodies toBorrelia burgdorferi (Bb) in the serum and cerebrospinal fluid (CSF) of 20 patients (IFT, ELISA, Bb-specific IgG Western blot, Bb-specific IEF-IgG immunoblot). Nine of 10 tested patients had a definitely positive T-cell proliferative response to wholeB. burgdorferi, with a mean (±-SEM) stimulation index of 7.2±1.8. Because the patients studied exhibited no, or only mild to medium sequelae without any evidence of a chronic-progressive disease, we interpret the long-term persistence of specific T- and B-lymphocyte responses toB. burgdorferi as an “immunological scar syndrome”. Finally, diagnostic criteria of active neuroborreliosis are proposed.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    European journal of wildlife research 39 (1993), S. 131-135 
    ISSN: 1439-0574
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Summary In order to evaluate the humane killing of stone martens using traps, the following parameters were investigated for 115 marten cadavers: hematomas, shot wounds, skull fractures, enamel splintering, and cyanotic discolouration of the gastrointestinal tract. Of the animals analyzed, 25% were killed with firearms, 37% demonstrated enamel splintering, and 22% showed skull fractures. A more detailed reconstruction of the mortality due to the above combinations of parameters shows that a high proportion of martens were not immediately killed by the traps set. Hence, the regulations stipulated in the federal hunting law are not fulfilled in a great number of cases. A systematic testing of the traps used is thus absolutely necessary.
    Abstract: Résumé Afin de permettre l'évaluation d'un procédé visant à tuer les martres par piégeage tout en respectant les lois en matière de protection des animaux, on a relevé les paramètres suivants sur 115 cadavres: hématomes, lésions causées par le tir, fractures du crâne, esquilles d'émail dentaire et colorations cyanotiques du tractus gastro-intestinal. Les armes à tir ont tué 25% des animaux, 37% recèlent des esquilles d'émail dentaire, 22% présentent des fractures crâniennes. Une reconstitution plus précise des causes de mortalité par combinaison des paramètres avancés ci-dessus fait apparaître que, pour un grand nombre de martres capturées, la mort ne fut pas instantanée. Les dispositions telles qu'elles figurent dans la loi fédérale allemande ne sont donc pas correctement respectées. Une vérification systématique des pièges s'impose dès lors de façon urgente.
    Notes: Zusammenfassung Zur Beurteilung der tierschutzgerechten Tötung von Mardern, die durch die Fallenjagd zur Strecke kamen, wurden an 115 Marderkadavern folgende Parameter erhoben: Hämatome, Schußwunden, Schädelfrakturen, Zahnschmelzabsplitterungen und zyanotische Verfärbungen des Magen-Darm-Traktes. Mit Schußwaffen wurden 25% der Tiere getötet. 37% wiesen Zahnschmelzabsplitterungen auf und bei 22% fanden sich Schädelfrakturen. Eine nähere Rekonstruktion der Todesursachen durch Kombination der oben angeführten Parameter läßt auf einen hohen Anteil von Mardern schließen, die in Totschlagfallen nicht sofort tödlich gefangen wurden. Die im Bundesjagdgesetz festgelegten Anforderungen werden danach weitgehend nicht erfüllt. Eine systematische Überprüfung der Fallen ist dringend erforderlich.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 28 (1990), S. 3145-3154 
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The sequential copolymerization of 1,3,6-trioxacyclooctane (TOC) and 1,3-dioxolane (DOL) (B) with various vinyl monomers (A) was investigated. Under appropriate conditions amphiphilic block copolymers of the type AB and ABA were formed. The reaction mixtures and the isolated polymers were analyzed by GPC (double detection - IR and UV at 254 nm), IR, 1H-, and 13C-NMR spectroscopy. Block copolymers with chosen molecular weights and low polydispersity could be obtained only by sequential copolymerization of p-methoxystyrene on “living” TOC. In the polymerization of DOL with α-methylstyrene and i-butyl vinyl ether (IBVE) transfer reactions take place to a larger degree.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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