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  • 1985-1989  (8)
  • 1955-1959
  • 1986  (8)
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  • 1985-1989  (8)
  • 1955-1959
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  • 1
    Electronic Resource
    Electronic Resource
    Transport rate of drifting snow and the mean wind speed profile (1986)
    Springer
    Boundary layer meteorology 34 (1986), S. 213-241 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Transport rates, measured by weighing snow blown into a filter fabric trap, were greater over hard snow or ice than for the same wind speed over soft, fresh snow surfaces. Analysis of wind speed profiles from nine blizzards showed that friction between moving particles and the surface was less, and particle speeds were greater over hard surfaces. Transport rates at a given wind speed increased rapidly as aerodynamic roughness decreased in the rough-smooth transition region. Bagnold's theory for bed load transport provided a useful framework for the analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00122380
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nucleotide sequence of proteinase inhibitor II encoding cDNA of potato (Solanum tuberosum) and its mode of expression (1986)
    Springer
    Molecular genetics and genomics 203 (1986), S. 15-20 
    Details
    ISSN: 1617-4623
    Keywords: Proteinase inhibitor ; Potato ; cDNA sequence ; Wound indication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Two cDNA clones containing the complete coding region of a developmentally controlled (tuber-specific) as well as environmentally inducible (wound-inducible) gene from potato (Solanum tuberosum) have been sequenced. The open reading frame codes for 154 amino acids. Its sequence is highly homologous to the proteinase inhibitor II from tomato, indicating that the cDNA's encode the corresponding proteinase inhibitor II of potato. In addition the putative potato proteinase inhibitor II contains a sequence which is completely homologous with that of another small peptide proteinase inhibitor from potato, called PCI-I. Evidence is presented that this small peptide is probably derived from the proteinase inhibitor II by posttranslational processing. Northern type experiments using RNA from wounded and nonwounded leaves demonstrate that RNA homologous to the putative proteinase inhibitor II cDNA's accumulates in leaves as a consequence of wounding, whereas normally the expression of this gene is under strict developmental control, since it is detected only in tubers of potato (Rosahl et al. 1986). In addition the induction of this gene in leaves can also be achieved by the addition of different polysaccharides such as poly galacturonic acid or chitosan. In contrast to the induction of its expression by wounding in leaves, wounding of tubers results in a disappearance of the proteinase II inhibitor m-RNA from these organs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00330378
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Exact results for the distribution of thef-level ground state occupation in the spinless Falicov-Kimball model (1986)
    Springer
    The European physical journal 63 (1986), S. 45-53 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present sharp upper and lower bounds for the ground state energy of the spinless Falicov-Kimball model, leading to rigorous results for a special choice of parameters. In this ‘symmetric’ case we are able to give the exactf-level occupation pattern for a square lattice. A superstructure occurs, leading to a metal-insulator transition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01312577
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Shell effects in the evolution of the mass asymmetry in heavy-ion collisions leading to composite systems withZ=108 (1986)
    Springer
    The European physical journal 325 (1986), S. 335-346 
    Details
    ISSN: 1434-601X
    Keywords: 25.70 Jj ; 25.85 Ge
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fragment mass distributions are presented obtained in the heavy-ion reactions22Ne+249Cf,32S+238U,40Ar+232Th and56Fe+208Pb leading to composite systems with equal nuclear charge numberZ=108. The experiments were performed at the heavy-ion cyclotron U 300 of the Laboratory of Nuclear Reactions in Dubna. The spectrometer DEMAS was used to measure the time-of-flight values and the laboratory angles of the correlated fragments. The shape of the mass distributions strongly depends on the initial mass asymmetry. When decreasing the bombarding energy down to values near the Coulomb barrier, the mass distributions obtained in the reactions32S+238U and40Ar+232Th exhibit relative maxima ofM≈205 interpreted to be due to stabilizing effects of nuclear shells during the fragmentation process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294618
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  • 5
    Electronic Resource
    Electronic Resource
    Critical distance for fusion and fusion barriers of very-heavy-ion collisions (1986)
    Springer
    The European physical journal 325 (1986), S. 239-240 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract For the fusion barriers of very-heavy-ion collisions we derive a simple analytical formulae which is based on the concept of the critical distance for fusion. The analytical expression reproduces the experimental fusion barriers within a large range of target-projectile combinations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289656
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  • 6
    Electronic Resource
    Electronic Resource
    Acyl- und Alkylidenphosphane. XXX. Molekül- und KristallStruktur des 1H-1,3-BenzazaphospholsProfessor Rolf Appel zum 65. Geburtstage am 25. Februar 1986 gewidmet (1986)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 540 (1986), S. 336-344 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Acyl- and Alkylidenephosphines. XXX. Molecular and Crystal Structure of 1H-1,3-Benzazaphosphole1H-1,3-Benzazaphosphole synthesized by Issleib and coworkers [2], crystallizes in the orthorhombic space group Pna21 with following dimensions of the unit cell Determined at a temperature of measurement of -80 ± 3°C: a = 828.6(2); b = 557.1(1); c = 1433.5(4) pm; Z = 4. An X-ray Structure Determination (Rg = 0.061) shows the molecule to be characterized by a rather narrow C—P=C angle of 88.2(4)° as well as a shortened single {180.7(7)} and a typical double bond {169.5(9) pm} between the carbon atoms and the twofold coordinate phosphorus. All the other bond lengths differ only scarcely from corresponding values of the homologues benzimidazole 2a [3, 4] and 1H-1,3-benzazarsole 2c [5]. In spite of the fact that all three solids crystallize in the same space group, only the heterocycles 2b and 2c are isotypic; intermolecular hydrogen bonds as found in 2a, are no longer present in the heavier homologues.
    Notes: Das Von Issleib u. Mitarb. [2] dargestellte 1H-1,3-Benzazaphosphol 2b kristallisiert orthorhombisch in der Raumgruppe Pna21 mit folgenden, bei einer Meßtemperatur Von -80 ± 3°C bestimmten Abmessungen der Elementarzelle: a = 828,6(2); b = 557,1(1); c = 1433,5(4) pm; Z = 4. Nach den Ergebnissen einer Röntgenstrukturanalyse (Rg = 0,061) weist das Molekül bei einem C—P=C-Winkel Von nur 88,2(4)° eine auf 180,7(7) pm Verkürzte Einfach- und eine mit 169,5(9) pm typische Doppelbindung zwischen Den Kohlenstoffatomen und Dem zweifach koordinierten Phosphoratom auf. Die übrigen Bindungslängen weichen kaum Von Den für die Homologen Benzimidazol 2a [3, 4] und 1H-1,3-Benzazarsol 2c [5] publizierten Werten ab. Obwohl bei allen drei Kristallstrukturen die gleiche Raumgruppe auftritt, sind nur die Heterocyclen 2b und 2c zueinander isotyp; die für Verbindung 2a charakteristischen intermolekularen Wasserstoffbrücken bilden sich bei Den schwereren Homologen nicht mehr aus.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19865400936
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Peroxofluorokomplexe der Übergangsmetalle. VII. Peroxofluorokryolithe A3Ti(O2)F5 (A = K, Na) und K2NaTi(O2)F5 Kristallstruktur von K3Ti(O2)F5 (1986)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 537 (1986), S. 175-188 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Peroxofluoro Complexes. VII. Peroxofluorokryolithes A3Ti(O2)F5 (A = K, Na) and K2NaTi(O2)F5. Crystal Structure of K3Ti(O2)F5Peroxofluorokryolithes A3Ti(O2)F5 (A = K, Na) and K2NaTi(O2)F5 were prepared at pH 4.5-6 by adding H2O2 and AOH/AF to solutions of TiO2 in hydrofluoric acid or aqueous solutions of TiF4. In the range of pH 3-4.5 exist phases of peroxofluoro-kryolithes with variations in stoichiometrie. A single crystall X-ray structure analysis of K3Ti(O2)F5 (Fm3m, a = 883.6(1) pm) yielded a disordered kryolithstructure (R = 0.020, RW = 0.017). Na3Ti(O2)F5 was found to crystallize in two monoclinic low-temperature - and one cubic high-temperature modifications. K2NaTi(O2)F5 crystallizes cubic (Fm3m) with a = 847.8(1) pm. Vibrational spectra have been measured and thermal behavior was studied by DTA/DTG and high-temperature guinier. At pH 9.5 K3Ti(O2)2F3 has been synthesized
    Notes: Peroxofluorokryolithe A3Ti(O2)F5 mit A = K, Na und K2NaTi(O2)F5 wurden aus flußsauren TiO2- oder wäßrigen TiF4-Lösungen, H2O2 und AOH/AF zwischen pH 4,5 und 6 hergestellt. Zwischen pH 3 und 4,5 existieren Peroxofluorokryolithphasen. Die Bestimmung der Kristallstruktur von K3Ti(O2)F5 (Fm3m, a = 883,6(1) pm) führte zu einem Kryolithfehlordnungsmodell, in dem auch die Alkaliionen statistisch fehlgeordnet sind (R = 0,020, RW = 0,017). Von Na3Ti(O2)F5 wurden zwei monokline Normaltemperatur- und eine kubische Hochtemperaturmodifikation aufgefunden. K2NaTi(O2)F5 kristallisiert kubisch (Fm3m) mit a = 847,8(1) pm. Die Schwingungsspektren wurden aufgenommen und das thermische Verhalten mittels DTA/DTG und Heizguinieraufnahmen untersucht. Bei pH 9,5 wurde die Verbindung K3Ti(O2)2F3 synthetisiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19865370619
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  • 8
    Electronic Resource
    Electronic Resource
    Peroxofluorokomplexe der Übergangsmetalle. VI. Darstellung, Schwingungsspektren und Kristallstruktur von (NH4)3Zr(O2)F5. Ein neues Fehlordnungsmodell für Ammonium-peroxopentafluorometallate(IV) mit Elpasolith-Struktur (1986)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 535 (1986), S. 135-142 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Peroxofluoro Complexes. VI. Preparation, Vibrational Spectra, and Crystal Structure of (NH4)3Zr(O2)F5. A New Disorder Model for Ammonium Peroxopentafluoro Metallates(IV) with Elpasolite Structure(NH4)3Zr(O2)F5 has been prepared from solution and characterized by the i.r. and raman spectra. The disordered crystal structure was determined: space group Fm3m, Z = 4, a = 944.01(8) pm, Rw = 0.014 for 162 reflections. A new disorder model - revised with respect to former proposals made for the isotypic Ti compound - allows now to derive unambiguously the geometry of the complex anions: d(O—O) = 157(1), d(Zr—O) = 206.3(9), d(Zr—F), average 203.8 pm. An analogous treatment of the disorder for (NH4)3Ti(O2)F5 also led to a significant improvement of the results (Rw = 0.019, d(O—O) = 151(2), d(Ti—O) = 197(1), d(Ti—F), average 191.6 pm).
    Notes: (NH4)3Zr(O2)F5 wurde aus Lösung dargestellt, IR- und Raman-spektroskopisch charakterisiert, und die fehlgeordnete Kristallstruktur bestimmt: Raumgruppe Fm3m, a = 944,01(8) pm, Z = 4, Rw = 0,014 für 162 Reflexe. Ein neues, gegenüber früheren Vorschlägen für die isotype Ti-Verbindung verbessertes Fehlordnungsmodell erlaubt nun die widerspruchsfreie Ableitung der Gestalt der komplexen Anionen: d(O—O) = 157(1), d(Zr—O) = 206,3(9), d(Zr—F) = 203,8 pm (gemittelt). Analoge Behandlung der Fehlordnung führte auch bei (NH4)3Ti(O2)F5 zu einer deutlichen Verbesserung früherer Resultate (Rw = 0,019, d(O—O) = 151(2), d(Ti—O) = 197(1), d(Ti—F) gemittelt 191,6 pm).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19865350415
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