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  • 2000-2004  (70)
  • 1975-1979  (59)
  • 1940-1944  (15)
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  • 1
    Series available for loan
    Series available for loan
    Geology and resources of base-metal vanadate deposits (1975)
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Details Availability
    Call number: SR 90.0002(926-A)
    In: Professional paper
    Type of Medium: Series available for loan
    Pages: V, A-14 S.
    Series Statement: U.S. Geological Survey professional paper 926-A
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Vanadium resources in titaniferous magnetite deposits (1975)
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Details Availability
    Call number: SR 90.0002(926-B)
    In: Professional paper
    Type of Medium: Series available for loan
    Pages: V, B-10 S.
    Series Statement: U.S. Geological Survey professional paper 926-B
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 3
    Electronic Resource
    Electronic Resource
    Carbon-13 and proton nuclear magnetic resonance spectroscopic evidence for a molecular complex of actinomycin D and 10,11-dihydro-3H-naphth[1,2-g]indazol-7-ol (1978)
    s.l. : American Chemical Society
    The @journal of organic chemistry 43 (1978), S. 4542-4545 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00417a039
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  • 4
    Electronic Resource
    Electronic Resource
    Athermal annealing of phosphorus-ion-implanted silicon (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 77 (2000), S. 1997-1999 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A 1 cm2 area in phosphorus-implanted silicon samples is annealed by irradiation of a much smaller 0.002 cm2 area with a single laser pulse. Resistivity of the annealed region is uniform and similar to that measured after thermal annealing. Electrically activated donors did not diffuse into the sample and only slightly towards the sample surface. The process is 100% reproducible. We present evidence that the annealing is not caused by heat. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1312259
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  • 5
    Electronic Resource
    Electronic Resource
    Plant Productivity in the Arid and Semiarid Zones (1978)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology 29 (1978), S. 277-317 
    Details
    ISSN: 0066-4294
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pp.29.060178.001425
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  • 6
    Electronic Resource
    Electronic Resource
    Contribution of stored pre-anthesis assimilate to grain yield in wheat and barley (1977)
    [s.l.] : Nature Publishing Group
    Nature 270 (1977), S. 431-433 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Wheat and barley were grown during 1974-75 at the Centre de Investigaciones Agricolas del Noroeste (CIANO) near Ciudad Obregon in north-west Mexico. There was no rain and crops were either flood irrigated frequently (I) or only until 27th January, about 40 d before anthesis, creating a drought (D) ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/270431a0
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  • 7
    Electronic Resource
    Electronic Resource
    Observation of spontaneous parametric four-photon scattering in aqueous solutions of electrolytes (1976)
    Springer
    Optical and quantum electronics 8 (1976), S. 279-284 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract We have observed spontaneous parametric four-photon scattering in electrolytic solutions (alkali halides and alkaline earth halides in water). The spectral, temporal, and spatial intensity distributions of the scattered light have been measured. Using a Q-switched ruby laser as a pump, and a CuSO4-solution as a filter we observed signal wavelengths in the range from 350–550 nm with a maximum intensity at 480 nm for all of the investigated solutions. This radiation is emitted into a cone with a half-angle of roughly 60 mrad. In comparison to pure water the scattered radiation in electrolytes has a much higher intensity. Most of the experimental results confirm predictions of the theory of spontaneous four-photon scattering.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00619539
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  • 8
    Electronic Resource
    Electronic Resource
    First observation of different diffusion coefficients for two conformers in a neat liquid (2000)
    Springer
    Naturwissenschaften 87 (2000), S. 225-228 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract  Self-diffusion coefficients were studied for the highly polar liquid N-methylformamide at pressures up to 200 MPa between the melting pressure curves and 420 K by the spin-echo method. N-Methylformamide exists as a mixture of two conformers in the neat liquid. These conformers have large differences at lower temperatures in their dynamic and structural properties. The self-diffusion coefficient of the cis-conformer being 17% lower than that of the trans-conformer at the same T and p. This is the first observation of such an effect. The experimental study is supported by Monte Carlo (MC) calculations which show that the first neighbors around a cis conformer are arranged differently than in an all trans liquid. The difference leads in the simulations to a much lower dielectric constant for the trans-cis mixture and might also explain the retardation of diffusion for the cis conformer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001140050708
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  • 9
    Electronic Resource
    Electronic Resource
    Geometrische und elektrostatische Berechnungen am Quarz- und am Cristobalit-Typ. I. Modelle mit AB4-Tetraedern der Symmetrie $$\bar 4$$ 3m (1975)
    Springer
    Mineralogy and petrology 22 (1975), S. 1-14 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Summary Theoretical models for the low-quartz and for the low-cristobalite structure type are derived in which the AB4-tetrahedra have symmetry $$\bar 4$$ 3m and have variable angles of rotation μ. Special values of μ result in structures with higher symmetry than those of the low-quartz structure type (P3221-D 2 6 ) and of the low-cristobalite structure type (P41212-D 4 4 ) respectively. The computation of interatomic distances shows that the considerable rotations of the AB4-tetrahedra as compared with the structures of higher symmetry (which correspond to the atomic arrangements in high-quartz and to the one originally attributed to high-cristobalite, resp.) cannot be explained by steric hindrance. Furthermore, the computation of Madelung constants as a
    Notes: Zusammenfassung Es werden theoretische Modelle des Tief-Quarz- und des Tief-Cristobalit-Typs mit AB4-Tetraedern der Symmetrie $$\bar 4$$ 3m und variablem Verdrehungswinkel μ dieser Tetraeder abgeleitet. Spezielle Werte für μ ergeben für die Strukturen eine höhere Symmetrie als für den Tief-Quarz-Typ (P3221-D 3 6 ) bzw. den Tief-Cristobalit-Typ (P41212-D 4 4 ). Abstandsberechnungen zeigen, daß die beträchtlichen Verdrehungen der AB4-Tetraeder gegenüber diesen höher symmetrischen Strukturen, die der für Hoch-Quarz bzw. der ursprünglich für den Hoch-Cristobalit angenommenen Atomanordnung entsprechen, nicht durch sterische Hinderung erklärt werden können. Die Berechnung der Madelungschen Zahlen als Funktion von μ zeigt ferner, daß der elektrostatische Anteil der Gitterenergie nicht für die beobachteten μ-Werte verantwortlich ist. Aus den Rechenergebnissen wird geschlossen, daß die teilweise kovalente Einstellung des Winkels A-B-A als Ursache für diese Eigenheit des Quarz- bzw. des Cristobalit-Typs anzusehen ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081299
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  • 10
    Electronic Resource
    Electronic Resource
    Verfeinerung der Kristallstruktur des Schafarzikits, FeSb2O4 (1975)
    Springer
    Mineralogy and petrology 22 (1975), S. 236-241 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Summary The crystal structure of schafarzikite, FeSb2O4,a 0=8.59;c 0=5.91 Å, space groupP 4mbc-D 4h 13 ,Z=4, has been refined. The atomic arrangement agrees essentially with that determined byZemann. The refined structure, using Weissenberg diffractometer data, yielded a finalR value of 0.056. The Fe atoms are surrounded octahedrally by six oxygen atoms, the Sb atoms form with three oxygen atoms a flat trigonal pyramid.
    Notes: Zusammenfassung Die Verfeinerung der Kristallstruktur von Schafarzikit, FeSb2O4,a 0=8,59;c 0=5,91 Å, RaumgruppeP 4mbc-D 4h 13 ,Z=4, bestätigte im wesentlichen die vonZemann gefundene Atomanordnung. Die Struktur konnte bei Verwendung von Weissenberg-Diffraktometerdaten aufR=0,056 verfeinert werden. Die Fe-Atome werden von sechs Sauerstoffen in Form eines Oktaeders umgeben, die Sb-Atome bilden mit drei Sauerstoffen eine flache trigonale Pyramide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01087842
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