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  • Electronic Resource  (6)
  • 1990-1994  (6)
  • 1994  (3)
  • 1990  (3)
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  • Electronic Resource  (6)
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  • 1990-1994  (6)
Year
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 62 (1990), S. 220-224 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1744-6570
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Psychology
    Notes: The predictive validity of a measure of job compatibility was studied for theater personnel. Scores on a forced-choice instrument, developed from the Job Compatibility Questionnaire (JCQ), predicted employee performance (r = .22, p〈 .05), turnover (r = -.35, p〈 .01), and scores on a “value composite” (reflecting a combination of job performance and employee retention criteria) as defined by the research sponsor (P = .41, p〈 .01). Furthermore, job compatibility scores explained a statistically significant increment in turnover and value composite score variance when analyzed concomitantly with verbal and numerical ability test scores. Finally, job compatibility scores were shown to be nonredundant with hiring decisions based on an application review, reference check, and interview, whereas the cognitive ability test scores shared considerable redundancy with hiring decisions based on the current selection system.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Inventiones mathematicae 100 (1990), S. 143-165 
    ISSN: 1432-1297
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Electroanalysis 2 (1990), S. 21-30 
    ISSN: 1040-0397
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A large number of anodic oxygen-transfer reactions were studied at Au electrodes in both acidic and alkaline media. Results of competitive adsorption studies are interpreted and support the conclusion that adsorption is a prerequisite to subsequent oxygen- and electron-transfer steps. Many of these oxidation reactions gave the voltammetric appearance of reversible waves, even though the observed half-wave potential values were shifted hundreds of millivolts positive of the thermodynamic potentials. A catalytic mechanism is proposed in which adsorbed hydroxyl radicals (AuOH) participate in the oxygen-transfer step. The absence of pH effects on half-wave potentials for several inorganic compounds suggests that the electron transfer precedes the deprotonation step for these reactants.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1040-0397
    Keywords: Pulsed electrochemical detection ; Carbohydrates ; Liquid chromatography ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Waveforms used in pulsed electrochemical detection (PED) have frequencies of ca. 1 Hz when optimized to give a maximum signal-to-noise ratio (S/N) for carbohydrates. However, higher frequencies are desired for application of PED to capillary electrophoresis (CE) and microcolumn lipuid chromatography (MLC), which can produce narrow elution peaks. Minimization of the time periods for oxidative cleaning and reductive reactivation in PED waveforms generated by the Dionex pulsed Electrochemical Detector allows the increase in waveform frequency to ca. 3 Hz without change in the traditional time period of 200 ms, prescribed for integration of the anodic current. However, further increase in frequency requires a decrease in the integration period with a corresponding loss of signal strength.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Electroanalysis 6 (1994), S. 193-199 
    ISSN: 1040-0397
    Keywords: Platinum ; Platinum oxide ; Chronocoulometry ; Pulsed amperometric detection ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Results of a potential-step chronocoulometric study of oxide formation at a Pt-rotated minidisk electrode (0.00785 cm2) indicate that the anodic charge (qa) grows ca. as a linear function of the log time (t) for t = ca. 2-30 ms. Furthermore, the slope of the linear qa - log (t/ms) plot is proportional to the applied overpotential for oxide formation. The anodic peak current observed during linear potential-scan voltammetric experiments is nearly a linear function of scan rate (φ) for small φ (1000 〈 mV s-1) but shows substantial negative deviation from linearity for φ 〉 1000 mV s-1. The peak potential for oxide formation shifts in a positive direction for increasing values of φ, suggesting that this process is kinetically slow relative to large φ values. Reverse potential-step chronocoulometric measurements demonstrate that the background current in so-called “reverse-pulsed amperometric detection (RPAD)” can be decreased by inhibiting the conversion of the hydrous oxide (PtOH) to the inert oxide (PtO). Data also indicate that the rate of cathodic dissolution of surface oxide is dependent on applied potential for t 〈 2 to 30 ms. Oxide reduction continues even for t 〉 1000 ms.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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