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  • Engineering  (1)
  • Engineering General  (1)
  • Selenium  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Electroanalysis 6 (1994), S. 589-592 
    ISSN: 1040-0397
    Keywords: Selenium ; Stripping voltammetry ; Biological tissues ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A sensitive procedure for the determination of selenium in small quantities of biological tissues (5 to 10 mg), using square wave cathodic stripping voltammetry with an in situ formation of Cu2Se on the HMDE, is described. Microwave digestion and clean-room facilities have been used to prevent the loss of analyte and sample contamination. The method has been standardized through the analysis of NIST SRM 1577 bovine liver. The method offers a detection limit of 1 pg/mL. The average precision of determination at 150 pg/mL of Se is 1.8% RSD. This method is highly suitable for the determination of biopsy samples where the quantity available for the analysis is very limited.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Communications in Applied Numerical Methods 6 (1990), S. 161-171 
    ISSN: 0748-8025
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: In many situations, the sensitivity of the response of a structure to parameters affecting only a small part of the structure is desired. In such cases, it is efficient to use substructuring or static condensation approaches. However, static condensation is not available in all finite-element codes, and its implementation requires access to and familiarity with the source code of the program. The present paper suggests an alternative version of static condensation for sensitivity calculations which is easy to implement without access to the source code of the finite-element program. The proposed approach (black-box method) is demonstrated by applying it in system identification of joint parameters of 3D frame structures using a direct method for evaluating the sensitivity derivatives of the structural response with respect to the joint parameters.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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