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  • 1
    Electronic Resource
    Electronic Resource
    Selective removal of N-terminal methionine from recombinant human growth hormone by an aminopeptidase isolated from Aspergillus flavus (1998)
    Springer
    Journal of industrial microbiology and biotechnology 20 (1998), S. 287-290 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: aminopeptidase; N-terminal methionine; recombinant protein; recombinant human growth hormone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An aminopeptidase was isolated from a soil fungus, which specifically cleaves the unnatural N-terminal methionine in recombinant human growth hormone. Reaction mixtures with different ratios of aminopeptidase to recombinant methionyl human growth hormone showed that the removal of N-terminal methionine was complete at 1:200 (w/w), and more than 90% complete at ratios up to 1:2000 (w/w) when incubated for 24 h at 37°C. The data indicate that the aminopeptidase we have purified can be used for the efficient conversion of unnatural recombinant proteins to their natural form.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900525
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of polymerization temperature on polyaniline based electrorheological suspensions (1999)
    Springer
    Colloid & polymer science 277 (1999), S. 73-76 
    Details
    ISSN: 1435-1536
    Keywords: Key words Electrorheological fluid ; Polyaniline ; Dielectric spectrum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract As one of the intrinsically polarizable materials used in electrorheological (ER) fluid, polyaniline was synthesized by the chemical oxidation of aniline with ammonium peroxysulfate. ER fluids were prepared by dispersing polyaniline particles in silicone oil, and their rheological properties were measured. The effect of the polymerization temperature of polyaniline on its ER characteristics was investigated. ER fluids with polyaniline particles synthesized at −10°C (PA-10) showed the best ER performance (yield stress) compared with those synthesized at higher temperatures. A difference in the flow behavior of the ER fluids was also investigated through the dielectric spectra of ER fluids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050369
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Electrorheological characteristics of polyaniline and its copolymer suspensions with ionic and nonionic substituents (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 61-64 
    Details
    ISSN: 1435-1536
    Keywords: Key words Electrorheological fluid ; N-substituted copolyaniline ; Polyaniline ; Poly(aniline-co-o-ethoxyaniline)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Electrorheological (ER) characteristics of ER fluids, composed of suspensions of semiconducting polyaniline and two different copolyaniline particles in silicone oil, were determined experimentally. Ionic sodium diphenylamine sulfonate and nonionic o-ethoxyaniline were used to synthesize copolyanilines, i.e. N-substituted copolyaniline and poly(aniline-co-o-ethoxyaniline), respectively. ER fluids composed of these three different polymers were compared with respect to their rheological properties under an applied electric field. It was found that ER fluids containing a copolymer with an ionic group exhibited the highest ER performance among polyaniline and its copolymer systems in a shear-rate region above 1 s−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050009
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Graphitization of Carbon–Carbon Nanocomposites Produced in One Impregnation Step (1999)
    Springer
    Journal of materials science 18 (1999), S. 373-375 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006624532228
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    N-substituted copolyaniline for electrorheological material (1997)
    Springer
    Journal of materials science 16 (1997), S. 672-673 
    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:1018539905330
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    Paper (German National Licenses)
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