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  • Chemistry  (2)
  • Dip-coated electroenzymic glucose transducer  (1)
  • In vitroperformance  (1)
  • Optimisation  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 44 (1992), S. 1195-1203 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: This work describes the formation of discrete micelles (⋍ 0.1 μm) from ABA poly(oxyethylene-b-isoprene-b-oxyethylene) block copolymers in water. An efficient labeling of the micelles by polymerization of [14C]-styrene within the hydrophobic core is also described. These micellar nanoparticles are being considered as promising materials for controlled release and/or site-specific drug delivery systems. In experimental animals the micelles remained in circulation with a half-life in excess of 50 h. Our results demonstrate the advantages of using block copolymers for the preparation of “perfect” biocompatible surfaces such as are required for well-tolerated, long-circulating particulate drug carriers.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 27 (1989), S. 515-525 
    ISSN: 0887-6258
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 23 (1985), S. 108-115 
    ISSN: 1741-0444
    Keywords: Dip-coated electroenzymic glucose transducer ; In vitroperformance ; Optimisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract The details of construction and the performance characteristics of a dipcoated electroenzymic glucose transducer comprising an H2O2 electrode coated with a layer of glucose oxidase encapsulated in cellulose acetate and overlaid with a layer of polyurethane are presented. The steady-state current increases when the glucose oxidase and cellulose acetate concentrations of the dip-coating solutions are increased, but high cellulose acetate concentrations yield thick and mechanically unstable membranes. A compromise between current yield and mechanical stability can, however, be achieved by employing glucose oxidase and cellulose acetate concentrations of 200 mg ml−1 and 2–5 g 100 ml−1, respectively. A polyurethane concentration of 6 g 100ml−1 is optimal both in terms of the current yield and the linearity of response. The relationship between steady-state current and D-glucose concentration is approximately linear over the concentration range 0·5 to 11·5 mm, and if correction is made for deviations from linearity at higher glucose concentrations, concentrations in excess of 20 mM can readily be quantified. The steady-state current is pH and temperature dependent, but the dependencies are relatively small in the physiological range. The mean rate of decrease of the glucose current during long-term operation of the optimised transducer is 0·83 per cent of the initial current per hour at 37°C. The hydrated electrodes perform satisfactorily after storage for more than two weeks at room temperature. the transducers have a mean response time [t 90%] of 50 s or less.
    Type of Medium: Electronic Resource
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