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  • Articles  (4)
  • Polymer and Materials Science  (4)
  • 1995-1999  (4)
  • 1985-1989
  • 1
    Electronic Resource
    Electronic Resource
    Diffusion coefficients of gallium(III) in potassium nitrate and potassium chloride supporting electrolytes (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 231-234 
    Details
    ISSN: 1040-0397
    Keywords: Diffusion coefficients ; Gallium ; Mass transport ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The diffusion coefficient values of GaIII in potassium nitrate and potassium chloride supporting electrolytes have been obtained polarographically. The half-wave potential, E1/2, and E3/4-E1/4 values have also been determined. The E3/4 - E1/4 values confirm the irreversibility of GaIII reduction in KNO3 and KCl electrolytes.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140090308
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  • 2
    Electronic Resource
    Electronic Resource
    Voltammetry and LCEC of isoflavones (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 796-799 
    Details
    ISSN: 1040-0397
    Keywords: Isoflavones ; Cyclic voltammetry ; High-performance liquid chromatography ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This study provides electrochemical and LCEC determination for three of the most abundant and most important isoflavones, Biochanin A, formononetin, and genistein. Cyclic voltammetry and pH-potential diagrams show that the isoflavones undergo pH-dependent irreversible oxidations. The LCEC determination of the isoflavones has been optimized for mobile phase composition and detection potential. Sub-nanogram detection limits have been achieved.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140091013
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  • 3
    Electronic Resource
    Electronic Resource
    Evaluation of diffusion coefficients of metallic ions in aqueous solutions (1996)
    Weinheim : Wiley-Blackwell
    Electroanalysis 8 (1996), S. 307-313 
    Details
    ISSN: 1040-0397
    Keywords: Diffusion coefficients ; Diffusion ; Metallic ions ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Many techniques are available for the determination of diffusion coefficients of ions in aqueous solutions. A review of classical and modern techniques is presented. Non-electrochemical methods are discussed briefly. Electrochemical methods reviewed include chronoamperometry, chronopotentiometry, polarography, and hydrodnamics. Selected values of the diffusion coefficients determined by these electrochemical methods of the metallic ions AgI, BiIII, CdII, CuII InIII, PbII, TlI, and ZnII are presented.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140080402
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  • 4
    Electronic Resource
    Electronic Resource
    Electrochemistry of hexacoordinate silicon(IV) porphyrin complexes (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 1273-1277 
    Details
    ISSN: 1040-0397
    Keywords: Cyclic voltammetry ; Porphyrins ; Silicon ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cyclic voltammetry was used to characterize the oxidation-reduction behavior of a series of novel hexacoordinate silicon(IV) porphyrin complexes. Each (Por)SiX2 [Por = the dianions of the porphyrins: tetrakis(p-tolyl)porphyrin (TTP), tetraphenylporphyrin (TPP), tetrakis(p-trifluoromethylphenyl)porphyrin (TTFP), octaethylporphyrin (OEP), × = F, Cl, O3SCF3] complex undergoes one to two oxidations and one to two reductions, all occurring at the porphyrin ring. No silicon(IV) reduction is observed for any of the porphyrin complexes. The effects of solvent, supporting electrolyte, substituents on the porphyrin ring, axial ligands, certral metal, and ruffling of the porphyrin ring are described.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140091611
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