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  • 1980-1984  (6)
  • 1960-1964  (15)
  • 1
    Electronic Resource
    Electronic Resource
    Bronchoskopie, Bronchographie und Thorakotomie bei röntgenologischen Verschattngen und Aufhellungen in der kindlichen Lunge (1960)
    Springer
    Langenbeck's archives of surgery 296 (1960), S. 388-402 
    Details
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01439214
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Isolierung von Lysergsäure-Alkaloiden aus der mexikanischen Zauberdroge Ololiuqui (Rivea corymbosa (L.) Hall. f.) (1960)
    Springer
    Cellular and molecular life sciences 16 (1960), S. 414-414 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The psychotomimetic active principles of the ancient aztec drug «Ololiuqui» (Rivea corymbosa (L.) Hall. f.) have been found to be alkaloids of the ergot type. Three of the components could be crystallized and identified, i.e. ergine (isolysergic acid amide), isoergine (Lysergic acid amide) and chanoclavin. The same alkaloids were found in the seeds of the related convolvulaceous vineI pomoea tricolor Cav.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02178840
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Eine neue Isomerisierungsreaktion der Mutterkornalkaloide vom Peptidtypus (1961)
    Springer
    Cellular and molecular life sciences 17 (1961), S. 108-108 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Ergot alkaloids of the peptide type and their dihydro-derivatives can be converted reversibly in acid solution into isomeric compounds. They are characterised by the prefix ‘aci’, e.g. aci-ergotamine, aci-dihydro-ergotamine. The isomerisation takes place in the peptide part of the molecule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02160811
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Die Totalsynthese des Ergotamins (1961)
    Springer
    Cellular and molecular life sciences 17 (1961), S. 206-207 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The total synthesis of the Ergot alkaloid Ergotamine is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02160615
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    d-Lysergyl-l-valin-methylester, ein neues, natürliches Mutterkornalkaloid (1963)
    Springer
    Cellular and molecular life sciences 19 (1963), S. 397-398 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A description is given of the isolation from ergot ofd-Lysergyl-l-valine methyl ester, a new minor alkaloid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02171505
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  • 6
    Electronic Resource
    Electronic Resource
    K, U and Th in mid-ocean ridge basalt glasses and heat production, K/U and K/Rb in the mantle (1983)
    [s.l.] : Nature Publishing Group
    Nature 306 (1983), S. 431-436 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Analyses on fresh glass samples of mid-ocean ridge basalt yield a uniform ratio K/U = 12,700 ± 200. In contrast, Th/U increases systematically with Th concentration. From these results we calculate an upper limit (1.5 pW kg−1) and a best estimate (0.6 pW ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/306431a0
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Sr and Nd isotope geochemistry of oceanic basalts and mantle evolution (1982)
    [s.l.] : Nature Publishing Group
    Nature 296 (1982), S. 821-825 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sr and Nd isotope ratios are reported for 17 mid-ocean ridge basalts and for 11 oceanic islands and island groups. Data from the Azores, Samoa and the Society Islands diverge significantly from the mantle array. These results are not explained by binary mixing of depleted and undepleted mantle ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/296821a0
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Case studies on the origin of basalt (1983)
    Springer
    Contributions to mineralogy and petrology 84 (1983), S. 382-389 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract This paper presents a method for the systematic trace element modelling of a cogenetic suite of lavas. It is based on the geochemical inversion technique of Allègre and coworkers and utilizes the variations in the trace element concentrations of the lavas to calculate initial concentrations and source mineralogy. We reduce this inversion to a simple, step-by-step procedure: (1) correcting for fractional crystallization; (2) testing the inferred primary melt compositions for consistency with a model of equilibrium partial melts (with constant partition coefficients) formed from identical sources; (3) estimating the proportions of mineral phases entering the melt; (4) computing concentrations and bulk partition coefficients in the initial source relative to the concentration of a common reference element; (5) estimating relative mineral abundances in the source. Except for the fractionation correction, the calculations are done element by element using a direct analytic solution. For the purpose of comparison we apply this method to the same set of data used by Minster and Allègre (1978), a suite of lavas from Grenada (lesser Antilles) originally analyzed by Shimizu and Arculus (1975). The results of both methods agree well for the source abundances of the light REE, whereas the heavy REE abundances are shown to be poorly constrained by the data. Both methods require residual clinopyroxene and garnet in the source, but the ratio of these minerals is not well constrained. We are unable to reproduce the shape of D0 pattern (=bulk partition coefficients of the initial source) given by Minster and Allègre. The reason for this cannot be evaluated without repeating their calculations in detail. The set of data from Grenada is useful for comparison of the methods only, because it is now known from isotopic data that the samples are not truly cogenetic. Possibly better suited sets of samples for petrogenetic modelling are presented in parts II and III of this series.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01160289
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  • 9
    Electronic Resource
    Electronic Resource
    Angiokeratoma corporis diffusum (Fabry) mit cerebralen Manifestationen (1962)
    Springer
    Journal of neurology 183 (1962), S. 351-362 
    Details
    ISSN: 1432-1459
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00244418
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  • 10
    Electronic Resource
    Electronic Resource
    Availability of nitrogen and phosphorus in the nival zone of the Alps (1983)
    Springer
    Oecologia 57 (1983), S. 266-269 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In high-alpine soils the maximum temperature is low even during the growing season, and hence mineralisation of nutrients is reduced. The aim of this study was to investigate what sources of nitrogen and phosphorus are available for vascular plants in the alpine nival zone to support growth. Using acetylene reduction assays levels of nitrogenase activity were assessed in sealed pots containing nival zone soil and plants at an altitude above 3000 m, and in bacterial isolates of soil and rhizosphere in the laboratory. Nitrogenase activity could not be detected in bacterial isolates or in the soil containing no plants. Small quantities of ethylen (〈87 nmol·h-1 per pot) were detected in pots with Cerastium uniflorum and Poa laxa. This activity must be attributable to rhizosphere bacteria since no evidence for the presence of cyanobacteria could be obtained. Other sources of nitrogen for the plants were detected in the form of ammonium and nitrate in soil water and in snow melt water. These solutions also contained extractable phosphorus in quantities normally considered to be sufficient for growth. Analyses of the internal concentration of nitrogen and phosphorus also suggested that these elements were present in adequate amounts in these plants. It was considered that soil and snow melt water together may provide sufficient nitrogen and phosphorus to support the extremely small annual growth increment of nival zone plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379589
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    Paper (German National Licenses)
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