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  • Articles: DFG German National Licenses  (11)
  • 2000-2004  (1)
  • 1970-1974  (10)
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  • Articles: DFG German National Licenses  (11)
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Isomerization of Chemically Activated n-Pentyl Radicals (1971)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 75 (1971), S. 1632-1640 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100906a600
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and carbon-13 nuclear magnetic resonance spectrum of cis,trans-4,8-dodecadiene (1972)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 94 (1972), S. 6202-6203 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00772a051
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Identification of 1,25-Dihydroxycholecalciferol, a New Kidney Hormone controlling Calcium Metabolism (1971)
    [s.l.] : Nature Publishing Group
    Nature 230 (1971), S. 228-230 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A vitamin D metabolite, 25-dihydroxycholecalciferol, is further hydroxylated by kidney before acting as a hormone on target tissues. The structure of this kidney metabolite is now ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/230228a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Stabilizing feedbacks in glacier-bed erosion (2003)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 424 (2003), S. 758-760 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Glaciers often erode, transport and deposit sediment much more rapidly than nonglacial environments, with implications for the evolution of glaciated mountain belts and their associated sedimentary basins. But modelling such glacial processes is difficult, partly because stabilizing feedbacks ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature01839
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Vitamin D-induced Synthesis of mRNA for Calcium-binding Protein (1973)
    [s.l.] : Nature Publishing Group
    Nature 246 (1973), S. 100-101 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Size of CaBP-synthesizing polysomes. 1 rng (20 A2&o units) of polysomes from intestinal cells of vitamin D3-dosed chicks was layered on a 15 to 45% sucrose gradient in 25 mM NaCl, 25 mM Tris-HCl, /?H 7.5, 5 mM MgCl2 and centrifuged in the SW 36 rotor for 100 min at 2 C and 35,000 r.p.m. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/246100a0
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Biological Activity of a Polar Metabolite of Vitamin D 3 (1970)
    [s.l.] : Nature Publishing Group
    Nature 228 (1970), S. 763-764 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the intestine, compound P has never been found at concentrations above 1 ng/g of tissue, although it is the predominant form of the vitamin found in the intestine after a physiological dose of cholecalciferol. Because of the scarcity of material, classical bioassays based on the changes in bone ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/228763a0
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    The influence of electrical stimulation of the rat brain on serum prolactin levels (1973)
    Springer
    Cellular and molecular life sciences 29 (1973), S. 355-356 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Prolaktin wurde mittels Radio-immunbestimmung in Seren gemessen, die 30 und 60 min nach elektrischer Stimulation des Gehirns abgenommen wurden. Ähnliche Ergebnisse wurden in Kontrolltieren und elektrisch stimulierten Tieren erhalten. Die Serumprolaktinspiegel sanken, wenn die Elektroden in der präoptischen Region lagen. Ein vorübergehender Abfall wurde gemessen, wenn die Elektroden im ventralen, medialen Hypothalamus lagen. Keine Änderung im Prolaktinspiegel wurde gefunden, wenn die Elektroden im Neocortex lagen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01926527
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Thermal conductivity and isotopic impurities in single crystals of helium (1973)
    Springer
    Journal of low temperature physics 11 (1973), S. 363-394 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have utilized the enhancement of thermal conductivity by Poiseuille flow of the phonon gas to obtain highly sensitive measurements of phonon scattering by isotopic impurities in single crystals of helium. Crystal orientation, size, and quality may be inferred from the thermal conductivity data themselves. Our hcp 4 He crystals were grown at a constant pressure of 85.1 atm using apparatus and techniques that made possible some control over crystal orientation. An isotopic impurity concentration of 1.0×10−5 decreases the peak conductivity in these crystals by a factor of 1.9 along a direction perpendicular to thec axis. In the Poiseuille region a relaxation time limit has been achieved experimentally that allows our data to be fitted as a function of temperature and concentration with only one parameter. The observed scattering strength is a factor of 2.7 greater than can be explained in terms of mass-defect scattering alone. A number of current theories are examined in the light of this result. Our pure 4 He data strongly support aT −3 dependence for the normal-process relaxation time. Measurements of the thermal conductivity parallel to thec axis reveal no anisotropy in either the normal-process relaxation time or the isotopic scattering strength.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00656559
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Attenuation of zero sound and the several low-temperature phases of liquid3He (1974)
    Springer
    Journal of low temperature physics 15 (1974), S. 169-210 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Measurements of the attenuation of 10-MHz compressional waves in liquid3He along the melting curve reveal a sharp peak at the A transition (2.7 mK). In a magnetic field this feature splits into two attenuation peaks, separated by a temperature difference proportional to H. The shapes of these peaks, though changing markedly betweenH=0 and 1 kOe, are all consistent with the A phase being an anisotropic BCS-type superfluid and inconsistent with an isotropic gap model. Field-dependent time variations in the attenuation and various transient effects provide further clues to the nature of this phase. A third sharp attenuation peak—at the B transition (≲2 mK)—possibly represents scattering from a liquid-liquid interface. It is, in any event, consistent with an isotropic superfluid B phase. Velocity changes have been observed at both A and B transitions, indicating velocities in the B phase significantly less than that of first sound at the same pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00655633
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    The low temperature viscosity of normal liquid3He (1973)
    Springer
    Journal of low temperature physics 13 (1973), S. 503-523 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Measurements between 35 and 110 mK along the melting curve indicate that in the normal Fermi liquid region the viscosity of 3 He is given by (ηT 2 )−1 =a−bT n withn=1.0. The measured constants area=0.816 andb=4.43 for η in micropoise andT in Kelvin. Very little solid could be formed in this particular apparatus without immobilizing the vibrating wire viscometer. Patterns were observed in the solidification, however, which suggest that such a device could be operated at much lower temperatures in a compressional cooling cell of appropriate design. A systematic study was made of the excitation of different vibrational modes of the viscometer by varying the magnetic field orientation and the nature of the driving current. The use of tone burst and dc, as well as CW, excitation currents allows the same viscometer to be used over a wide range of viscosities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00656543
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    Paper (German National Licenses)
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