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  • 2000-2004  (3)
  • 1955-1959  (4)
  • 1935-1939  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Interface structure of ultrathin CoSi2 films epitaxially grown on Si(111) (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 727-729 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The interface structure of ultrathin CoSi2 films grown on Si(111) was investigated by quantitative low-energy electron diffraction. Codeposition of the elements leads to a film composed of domains with two and three Si–Co–Si trilayers in CaF2 structure. As within the film, Co atoms at the interface are eightfold coordinated. The lateral unit cells of the film and substrate are mutually rotated by 60° (B-type orientation). The interfacial trilayer is substantially distorted, its distance to the substrate expanded, and its sublayer spacings considerably modified from the bulk. Also, the substrate's top spacing is expanded. The results compare almost quantitatively with recent density-functional calculations. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125875
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Diffraction contrast in X-ray radiographic images of octahedrite meteorites (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 34 (2001), S. 566-572 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Slices of ∼12 mm thickness cut out of an octahedritic iron–nickel meteorite of the Gibeon shower were investigated by conventional X-ray transmission radiography. When the direction of the incident X-ray beam is parallel to one or two of the four habit planes of the kamacite lamellae, black–white contrast lines are observed in the radiographs. These lines are attributed to Bragg reflection, at lattice planes parallel to the lamellae planes, of a narrow band of wavelengths filtered out of the incident white spectrum by absorption in the sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889801009529
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Understanding heterogeneous catalysis on an atomic scale: a combined surface science and reactivity investigation for the dehydrogenation of ethylbenzene over iron oxide catalysts (2000)
    Springer
    Topics in catalysis 14 (2000), S. 111-123 
    Details
    ISSN: 1572-9028
    Keywords: metal oxides ; atomic scale surface chemistry ; TDS ; single crystal flow reactor ; high pressure ; pressure gap ; defects ; active carbon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In order to study the dehydrogenation of ethylbenzene to styrene, epitaxial iron oxide model catalyst films with Fe3O4(111), α-Fe2O3(0001) and KFe x O y (111) stoichiometry were prepared in single crystal quality on Pt(111). They were investigated using surface science techniques before and after atmospheric pressure reaction experiments in a newly designed single crystal flow reactor. As expected from low-pressure measurements, Fe3O4(111) is catalytically inactive. The catalytic activity of α-Fe2O3(0001) starts after an activation period of about 45 min. After that, the surface is essentially clean but shows a high concentration of defects. On the potassium-promoted films, however, the activation period is much longer, the activity then is higher and the surface gets covered completely with carbon and oxygen during reaction. This indicates a different reaction pathway on the promoted films with a carbon–oxygen species as catalytically active species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009067302464
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  • 4
    Electronic Resource
    Electronic Resource
    Literatur (1936)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 105 (1936), S. 378-379 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01370500
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Bemerkungen zur Darstellung einiger Chloride und Oxychloride der Metalle der V. Nebengruppe (1958)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 295 (1958), S. 327-333 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Improved or new methods of preparation of the chlorides and oxychlorides of vanadium, of NbCl5, TaCl5, NbCl5 · SCl4, and TaCl5 · SCl4 are described.
    Notes: Es werden besonders geeignete Methoden zur Darstellung der Vanadinchloride und Oxychloride sowie der Pentachloride des Niobs und Tantals und deren Additionsverbindungen mit Schwefeltetrachlorid beschrieben.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19582950507
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  • 6
    Electronic Resource
    Electronic Resource
    Die Umsetzungen von Vanadinoxytrichlorid mit organischen SubstanzenProfessor Erich Thilo zum 60. Geburtstage gewidmet (1958)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 296 (1958), S. 36-45 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The preparation of some addition and substitution compounds between vanadium oxychloride and organic compounds containing oxygen or nitrogen are described.
    Notes: Es wird über die Darstellung einer Reihe Additions- und Substitutionsverbindungen des Vanadinoxytrichlorides mit sauerstoff- und stickstoffhaltigen organischen Verbindungen berichtet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19582960107
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  • 7
    Electronic Resource
    Electronic Resource
    Über einige Umsetzungen des Niob- und Tantalpentachlorids mit organischen Verbindungen (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 301 (1959), S. 271-276 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The compounds NbCl5 · HCl · 2 (C2H5)2O, TaCl5 · HCl · 2 (C2H5)2O, (TBA · H)2[NbOCl5] · 2 CHCl3, and (TBA · H)2[NbCl7] · 1.5 CHCl3 (TBA = tribenzylamine) are described. The reactions of the pentachlorides with salicylic acid and o-dihydroxybenzene have been investigated.
    Notes: Es werden die Verbindungen NbCl5 · HCl · 2 (C2H5)2O und TaCl5 · HCl · 2 (C2H5)2O sowie die Chlorokomplexe (TBA · H)2[NbOCl5] · 2 CHCl3 und (TBA · H)2[NbCl7] · 1,5 CHCl3 beschrieben. (TBA = Tribenzylamin). Ferner wird über Umsetzungen der Pentachloride mit Salicylsäure und Brenzcatechin berichtet.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593010506
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  • 8
    Electronic Resource
    Electronic Resource
    Flüssigkeitsdurchmischung in engen Blasensäulen (1957)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 29 (1957), S. 727-732 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Beim Durchgang eines stationären Blasenstroms durch eine Flüssigkeitssäule wird die Flüssigkeit durchmischt. Der Durchmischungsvorgang läßt sich formal wie ein Diffusionsvorgang behandeln, wobei der Diffusionskoeffizient durch einen Durchmischungskoeffizienten ersetzt werden muß. Es wird eine Methode zur Bestimmung solcher Koeffizienten mitgeteilt sowie der Durchmischungsvorgang in engen Blasensäulen diskutiert.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330291105
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