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  • 1
    Electronic Resource
    Electronic Resource
    Raman Spectrometer Assembled from Available Components (1956)
    s.l. : American Chemical Society
    Analytical chemistry 28 (1956), S. 1075-1079 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60115a004
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Deuterium exchange reactions of isobutane, n-hexane and n-heptane catalyzed over platinum single crystal surfaces (1983)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 87 (1983), S. 1545-1552 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100232a019
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Role of metallic tin in PtSn reforming catalysts (1992)
    Springer
    Catalysis letters 15 (1992), S. 51-55 
    Details
    ISSN: 1572-879X
    Keywords: PtSn bimetallic catalysts ; metallic tin ; XPS ; TEM ; oxygen chemisorption ; hexane reforming reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Metallic tin was detected using X-ray photoelectron spectroscopy (XPS) after H2 reduction of 5%Pt/SnO2, 5%Pt-5%Sn/SiO2, and 5%Pt-29%Sn/Al2O3. However, no metallic tin could be detected in PtSn/Al2O3 catalysts with tin loadings up to 5 wt%. These findings indicate that tin reducibility depends on the extent of interaction between SnO x and the substrate. Hexane reaction studies indicate that metallic tin poisons all reforming reaction channels regardless of the support.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00770897
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Photoemission studies of rhenium disulfide oxidation: Altered core-level structure and reactivity of defect sites (1989)
    Springer
    Catalysis letters 2 (1989), S. 1-7 
    Details
    ISSN: 1572-879X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract X-ray photoemission was used to investigate the initial stages of rhenium disulfide oxidation and the altered reactivity and core-level electronic structure of defect sites produced by argon ion sputtering of single crystal and polycrystalline ReS2-basal plane surfaces. Oxidation of polycrystalline-ReS2 with O2 at 100–300 ° C produced a mixture of surface oxides containing rhenium in the + 4 and + 7 oxidation states. Oxidation was facilitated by the presence of low coordination defect sites and was reversible upon resulfidization with H2S/H2 at 300 °C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00765324
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Fluorescence Yield Near Edge Spectroscopy (FYNES) of benzene adsorbed in Na-Y zeolite (1990)
    Springer
    Catalysis letters 6 (1990), S. 99-102 
    Details
    ISSN: 1572-879X
    Keywords: Benzene ; Na-Y zeolite ; Fluorescence Yield Near Edge Spectroscopy (FYNES)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Benzene adsorbed in sodium-Y zeolite has been investigated using Fluorescence Yield Near Edge Spectroscopy (FYNES). These studies demonstrate that FYNES measurements are feasible as a direct probe of the local electronic structure of hydrocarbons adsorbed in and on insulating, microporous practical catalysts. The distribution of π energy levels for adsorbed benzene was not significantly altered as compared to the condensed phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00764058
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Dynamic CT brain scanning in the haemodynamic evaluation of cerebral arterial occlusive disease (1987)
    Springer
    Neuroradiology 29 (1987), S. 259-265 
    Details
    ISSN: 1432-1920
    Keywords: Dynamic cerebral CT scanning ; Arterial occlusive lesions ; Haemodynamic effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Dynamic cerebral CT scanning (DCT) was used to quantitatively analyse the haemodynamic effects of extracranial and intracranial arterial occlusive lesions in 17 patients with TIA's or minor cerebral infarcts. Using DCT and gamma variate curve fitting, mean transit times were determined for the terminal internal carotid arteries, middle cerebral arteries and middle cerebral-supplied Sylvian cortex at the level of the Circle of Willis. Six patients were studied sequentially, four before and after transcranial bypass surgery. No arterial or tissue delays were found in patients without haemodynamic arterial lesions or cortical infarcts. Seven of nine patients with haemodynamic, extracranial carotid lesions showed ipsilateral delays in arterial or tissue transit times. Tissue delays usually correlated with CT or clinical evidence of infarction. Improved haemodynamics in patients re-studied correlated with the effects of surgery or clinical recovery. DCT has several important limitations but has the potential to provide additional haemodynamic information about the cerebral circulation in selected patients with cerebral arterial occlusive disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00451764
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Stamping rheology of glass mat reinforced thermoplastic composites (1990)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 11 (1990), S. 368-378 
    Details
    ISSN: 0272-8397
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Glass mat reinforced thermoplastics (GMTs) offer a useful combination of mechanical properties and formability. In principle, these composites may be based on any thermoplastic matrix. In practice, matrix selection is limited because of its impact on the manufacturing and compression molding processes. In this work an isothermal squeezing flow technique is used to determine the apparent biaxial extensional viscosities of polycarbonate, polybutylene terephthalate, and polypropylene-based GMTs. Experimental load-deformation data are interpreted by treating the GMTs as viscous, incompressible Newtonian fluids. Two primary effects are observed: (1) the composites appear to strain harden as they are deformed, and (2) GMT apparent biaxial extensional viscosities correlate with the high rate of deformation shear viscosities of the matrices. A mechanism that explains the second result is proposed.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pc.750110610
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    Paper (German National Licenses)
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