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  • 1
    Electronic Resource
    Electronic Resource
    Zirconia Nanoparticles Made in Spray Flames at High Production Rates (2004)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 87 (2004), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Synthesis of zirconia nanoparticles by flame spray pyrolysis (FSP) at high production rates is investigated. Product powder is collected continuously in a baghouse filter unit that is cleaned periodically by air-pressure shocks. Nitrogen adsorption (BET), X-ray diffractometry (XRD), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) are used to characterize the product powder. The effect of powder production rate (up to 600 g/h), dispersion gas flow rate, and precursor concentration on product particle size, crystallinity, morphology, and purity is investigated. The primary particle size of zirconia is controlled from 6 to 35 nm, while the crystal structure consists of mostly tetragonal phase (80–95 wt%), with the balance monoclinic phase at all process conditions. The tetragonal crystal size is close to the primary particle size, which indicates weak agglomeration of single crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1551-2916.2004.00197.x
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  • 2
    Electronic Resource
    Electronic Resource
    Role of the kinetic and potential sputtering in the regeneration of the soot (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 1499-1501 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have used the photoemission spectroscopy of the graphite hollow cathode sooting discharge to identify the roles played by the kinetic and potential sputtering, respectively. Our indicators are the relative densities of the sputtered carbon C, the Ne metastable atoms, and the ionized components (Ne+) of the regenerative sooting plasma. We find that the metastable atoms are the main agents for the regeneration of the soot. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1354661
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  • 3
    Electronic Resource
    Electronic Resource
    Alport-like glomerular changes in a patient with nephrotic syndrome: report of a case (2000)
    Springer
    Pediatric nephrology 14 (2000), S. 973-975 
    Details
    ISSN: 1432-198X
    Keywords: Key words Alport syndrome ; Nephrotic syndrome ; Basement membrane ; Lamellation ; Immune complex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We report a 17-year-old Saudi girl who presented with nephrotic syndrome at the age of 7 years. A renal biopsy revealed a mildly proliferative immune complex-mediated glomerulonephritis, which on ultrastructural examination revealed prominent thickening of the capillary basement membranes, along with marked splitting and lamellation of lamina densa resembling those seen in Alport syndrome. These changes were even more pronounced in renal biopsies performed 1 and 3 years later, respectively. Thorough clinical evaluations and follow-up of more than 10 years failed to reveal any evidence of Alport syndrome. Review of the literature revealed four similar cases reported previously. Diffuse and prominent Alport-like glomerular changes may rarely be seen in patients with nephrotic syndrome in the absence of Alport syndrome. Pathogenesis of these changes, however, remains to be understood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004670050055
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  • 4
    Electronic Resource
    Electronic Resource
    Thermal Decomposition of Trialkyl/Arylphosphine Gold(I) Cyanide Complexes (2000)
    Springer
    Journal of thermal analysis and calorimetry 61 (2000), S. 119-125 
    Details
    ISSN: 1572-8943
    Keywords: alkyl/arylphosphine gold(I) cyanide ; redox reaction ; thermal decomposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Combined TG/DTA techniques have been used to study the thermal decomposition of R3PAuCN (where Ris ethyl, cyclohexyl, o-tolyl, m-tolyl, p-tolyl, allyl, cyanoethyl,1-naphthyl and phenyl) complexes. It was observed that all of these complexes underwant decomposition cum redox reactions in the range of 200–600oC with evolution of both transligands, which are phosphine and cyanide, leaving metallic gold as a residue. The thermal decomposition of o-Tol3PAuCN has revealed that this is a stepwise process. In the first step decomposition takes place with evolution of phosphine and generation of AuCN, which in second step undergoes a redox reaction to produce metallic gold. The DTA curves have also confirmed these results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010164725008
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