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  • 1
    Electronic Resource
    Electronic Resource
    Flow of polymer solutions in porous media: inadequacy of the capillary model (1983)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 22 (1983), S. 299-305 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i100011a005
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fabrication of an Anode-Supported Sofc with a Sol-Gel Coating Method for a Mixed-Gas Fuel Cell (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 277-279 (Jan. 2005), p. 455-461 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: An anode-supported type solid oxide fuel cell (SOFC) is a promising structure resulting in a very high performance because it consists of a very thin electrolyte. In the preliminary stage, we have succeeded in the fabrication of Samaria-Doped Ceria (SDC) thin film on a porous Ni-Al substrate using a sol-gel coating technique. The thin electrolyte film binds the substrate well and a single cell made with the SDC thin-film electrolyte and porous LSM cathode exhibited a good performance in a mixed-gas condition, even at intermediate temperatures. The single cell, consisting of 20 µm thin SDC electrolytes, the porous Ni-Al anode substrate, and a LSM cathode,exhibited an open circuit voltage of 0.82V and a maximum power density of 0.31 W.cm-2 at 700℃ with humidified methane and air mixtures. This cell also generated an open circuit voltage of about 1.1V and a maximum power density of 0.34 W.cm-2 at 600℃ with humidified hydrogen as the fuel and air as the oxidant
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/48/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.277-279.455.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Alumina composite membranes prepared by MOCVD (1997)
    Springer
    Journal of materials science 16 (1997), S. 1023-1026 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Abstracts are not published in this journal
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018510204789
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis of ultrafine LiCoO2 powders by the sol-gel method (1996)
    Springer
    Journal of materials science 31 (1996), S. 3617-3621 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ultrafine high-temperature (HT) LiCoO2 powders were synthesized by the sol-gel method using polyacrylic acid (PAA) as a chelating agent. The decomposition process of the gel precursor was examined to determine the crystallization temperature and the dependence of the physicochemical properties of HT-LiCoO2 powders on the PAA quantity was extensively investigated. Polycrystalline HT-LiCoO2 powders, composed of very uniformly sized ultrafine particulates with an average particle size of 30–50 nm and a specific surface area of 2.3–17 m2g−1, could be obtained at the lower calcination temperature of 550 °C and the shorter calcination time of 1 h compared to the solid-state reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00352769
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  • 5
    Electronic Resource
    Electronic Resource
    Low-temperature preparation of ultrafine LiCoO2 powders by the sol–gel method (1997)
    Springer
    Journal of materials science 32 (1997), S. 3177-3182 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Ultrafine LiCoO2 powders were prepared at lower temperatures by the sol–gel method using maleic acid as a chelating agent. The conditions of the sol formation from an aqueous solution of metal nitrates containing maleic acid, and the crystallization behaviour during the thermal decomposition of the gel precursors, were examined. The effect of the molar ratio of maleic acid to total metal ions, as well as the calcination temperature, on the physicochemical properties of the LiCoO2 powders was also investigated. It was found that polycrystalline low- and high-temperature (LT- and HT-) LiCoO2 powders could be obtained at calcination temperatures of 500 and 600°C, respectively, with the calcination time of 1 h. They were found to be composed of very uniformly sized ultrafine particulates with an average particle size and a specific surface area of 30 nm and 12.4 m2g-1 for LT-LiCoO2 and 60 nm and 8.8 m2 g-1 for HT-LiCoO2, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018650717723
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A study on enzymatic reaction using a liquid emulsion membrane technique (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 39 (1992), S. 125-131 
    Details
    ISSN: 0006-3592
    Keywords: enzymatic reaction ; liquid membrane ; transport mechanism ; emulsion stability ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An enzymatic reaction using a liquid emulsion membrane technique was studied to investigate the effects of some experimental variables on the stability of liquid membrane, enzyme deactivation, and transport of substrates and products. The hydrolysis of L-phenylalanine methyl ester by α-chymotrypsin was selected as a model reaction system. First, a transport mechanism for the substrates and products across the membrane was qualitatively identified. Second, it was found that the pH of the internal phase was one of the most important variables to determine the enzyme activity in a liquid membrane. Third, the effect of membrane phase which consists of surfactant, carrier, and organic solvent on the emulsion stability was investigated. It was found that the properties of the organic solvents greatly affect the emulsion stability. For an optimum condition, it was possible to reuse the emulsion which consists of membrane phase and internal phase without further separation. It was finally concluded that the enzyme in a liquid membrane retained 60% of its native activity in spite of vigorous mixing during the emulsification step.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260390202
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    Paper (German National Licenses)
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