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  • 1
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 333-340 
    ISSN: 0887-6266
    Keywords: cellophane ; deformation effects ; induced piezoelectricity ; transport properties ; ionic transport ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: When a periodical deformation is applied to a cellophane film through which an ion flux is established by a concentration gradient, an electrical signal, synchronous with the deformation, can be detected on electrodes placed on both sides of the membrane. This signal was studied as a function of the amplitude and frequency of the deformation and the ionic concentration. Ionic resistance, permeability, water content and ionic concentration measurements were carried out in order to explain the particular dependence of the signal with the ionic concentration. © 1994 John Wiley & Sons, Inc.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Electroanalysis 3 (1991), S. 319-323 
    ISSN: 1040-0397
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The construction and performance of new carbon paste enzyme electrodes as amperometric sensors is described. Xanthine oxidase and alkaline phosphatase have been adsorbed on a carbon paste electrode (CPE), and physically entrapped with a semipermeable membrane. The product of enzymatic reaction, uric acid or p-nitrophenol, was electrochemically oxidized versus an Ag/AgCl electrode at +0.4 or +0.8 V, respectively, yielding a steady-state current directly related to the substrate concentration. Response characteristics as well as kinetic parameters have been evaluated.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Electroanalysis 3 (1991), S. 405-408 
    ISSN: 1040-0397
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The adsorptive stripping square-wave voltammetric behavior of bovine serum albumin (BSA) is described. Conditions were optimized for the determination of this protein with respect to accumulation potential, accumulation time, drop size, scan rate, frequency value, and electrolyte concentration. Under these optimum conditions for the determination of BSA, two calibration plots were obtained. For an accumulation time of 60 seconds, the plot was linear in the range 0.25-1.25 μg/mL of BSA (r = 0.997); for an accumulation time of 180 seconds, the linear range was 0.10-1.25 μg/mL of BSA (r = 0.997). The square-wave procedure offers the advantages of speed, higher sensitivity for the determination of BSA, and the discrimination against background currents. This method was applied successfully for the determination of total protein in fetal calf serum.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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