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  • 2010-2014
  • 2005-2009
  • 1980-1984  (14)
  • 1970-1974  (11)
  • 1984  (14)
  • 1970  (11)
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  • 2010-2014
  • 2005-2009
  • 1980-1984  (14)
  • 1970-1974  (11)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Neutron diffraction study of α-uranium at low temperatures (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 26 (1970), S. 129-136 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740870002066
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  • 2
    Electronic Resource
    Electronic Resource
    A neutron diffraction study of ferroelectric KFCT, K4Fe(CN)6.3D2O, above the Curie temperature (1970)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 26 (1970), S. 559-567 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A neutron diffraction study of deuterated potassium ferrocyanide trihydrate (KFCT) has been made above the ferroelectric Curie temperature. The monoclinic form, space group A2/a (No. 15), has a = 9.42, b = 17.01, c = 9.38 Å, and β= 90.03° at 20°C. Since all of the large crystals of KFCT were twinned by a 90° rotation about the b axis, data from both overlapped and nonoverlapped reflections were used in the determination of the structure. Refinement by a modified least-squares method that accounted for the overlapped data led to a weighted R value on F2 (3678 reflections) of 4.8%. The corresponding R on F is 4.9%. The disordered water molecules are of two types: one is disordered into two positions related by a twofold axis parallel to b: the other is disordered into two positions that are related by an approximate 90° rotation in the plane of the molecule. Both types of water molecules show O–D ...O or O–D...N bonding. The Fe(CN)4−6 octahedra are regular and the potassium ions are loosely surrounded by O and N atoms. This analysis has elucidated the role of the water molecules in the ferroelectric switching mechanism. The [{\bar 1}01] ferroelectric axis in this crystal can be explained on the basis of the dipole moment and orientation of the water molecule dipoles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739470001407
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  • 3
    Electronic Resource
    Electronic Resource
    Neutron diffraction cryo-orienter (1970)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 3 (1970), S. 289-294 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The cryo-orienter is used for neutron diffraction studies of single crystals between liquid helium and room temperatures. It combines a double Dewar cryostat with a three-circle goniostat. The temperature of the crystal is controlled by a combination of exchange gas and a bridge circuit to a stability of ±0.01 Kelvin degree. A ring assembly allows the cryostat to be angularly displaced ±50° from vertical (χ), and to be rotated 360° (φ), which provides crystal motion about two axes with ±0.01° precision. The ring assembly can be rotated about the diffraction vector. Crystals can be mounted along a non-major zone and sufficient data can then be collected with one crystal mounting. The ARCADE computer system controls the entire data collection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889870006313
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  • 4
    Electronic Resource
    Electronic Resource
    Zum Abbau von Hochpolymeren durch Ultraschall (1970)
    Springer
    Naturwissenschaften 57 (1970), S. 671-671 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00598797
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  • 5
    Electronic Resource
    Electronic Resource
    Ein neues Verfahren zum Auswuchten elastischer Rotoren (1984)
    Springer
    Archive of applied mechanics 54 (1984), S. 98-106 
    Details
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary The influence coefficients necessary for the balancing of flexible rotors can be determined with one single measuring run, if rotor vibrations are measured at different bearing stiffnesses. Experiments show good agreement with existing methods.
    Notes: Übersicht Die zum Auswuchten eines elastischen Rotors benötigten Einflußkoeffizienten lassen sich in einem einzigen Meßlauf ermitteln, wenn die Schwingungen des Rotors bei unterschiedlichen Lagersteifigkeiten gemessen werden. In Versuchen wurde eine gute Übereinstimmung mit bisher angewandten Methoden festgestellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00533308
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  • 6
    Electronic Resource
    Electronic Resource
    Approximation properties of theM n -operators (1970)
    Springer
    Aequationes mathematicae 5 (1970), S. 19-37 
    Details
    ISSN: 1420-8903
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01819267
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  • 7
    Electronic Resource
    Electronic Resource
    Approximation properties of theM n -operators (1970)
    Springer
    Aequationes mathematicae 4 (1970), S. 268-270 
    Details
    ISSN: 1420-8903
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01817774
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  • 8
    Electronic Resource
    Electronic Resource
    The role of inlet location on the dynamics of thin two-dimensional buoyant surface jets (1984)
    Springer
    Experiments in fluids 2 (1984), S. 137-142 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The transition between the motion of a subsurface buoyant jet and a supersurface buoyant jet has been studied. Measurements indicate that the transition region is sharp and characterized by an intermediate regime where both a wall-hugging flow and the more standard outlet flow are present. The point of transition was found to exhibit significant hysteresis depending on whether the receiving pool height was increasing or decreasing with time. Measurements of the temperature field downstream show that the effects of the different regimes on the density stratification can persist for long distances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00296429
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  • 9
    Electronic Resource
    Electronic Resource
    The ultrastructure of the cell surface and plasma membrane of exponential and stationary phase cells of Schizosaccharomyces pombe, grown in different media (1984)
    Springer
    Archives of microbiology 137 (1984), S. 128-134 
    Details
    ISSN: 1432-072X
    Keywords: Schizosaccharomyces pombe ; Cell wall ; Membrane ; Acid phosphatase ; Freeze preparations ; SEM ; TEM
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In order to study the ultrastructure of the cell surface and plasma membrane of Schizosaccharomyces pombe as a function of growth conditions we investigated exponential and stationary phase cells grown in rich and minimal medium. Electron microscopic preparation techniques based on rapid cryofixation (without cryoprotectants) were used. The intramembraneous aspects of the plasma membrane were described by freeze fracturing. For the first time the dynamic surface structures could be directly analyzed by freeze drying in the scanning electron microscope and in thin section of freeze substituted samples. This preparation techniques reveal hair-like structures on the surface of yeast cells. The hairs of cells grown in the rich medium are longer than those grown in the minimal medium. A mutant defective in the structure of a cell surface galactomannoprotein (acid phosphatase) reveals (under conditions of maximal acid phosphatase expression) a cell surface structure that differs from the wild type. It is likely that the hairs represent the peripheral galactomannan layer or part of it. On the membrane fracture faces the number, shape, distribution and state of aggregation of the intramembraneous particles are different between membranes of growing and non-growing cells and between cells grown under different physiological conditions. In the minimal medium corresponding periodical structures on the plasmic and exoplasmic fracture faces were observed, which clearly differ between exponential and stationary phase cells. The number, length and depth of plasma membrane invaginations increase as the cells go from the exponential phase to the stationary phase. Short and flattened invaginations are filled with thin periodic structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414453
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  • 10
    Electronic Resource
    Electronic Resource
    Superspace geometry and the minimal, non minimal, and new minimal supergravity multiplets (1984)
    Springer
    The European physical journal 26 (1984), S. 123-140 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We analyse superspace constraints in a systematic way and define a set of natural constraints. We give a complete solution of the Bianchi identities subject to these constraints and obtain a reducible, but not fully reducible multiplet. By additional constraints it can be reduced to either the minimal, non minimal or new minimal multiplet. We discuss the superspace actions for the various multiplets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01572550
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