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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Electroanalysis 7 (1995), S. 782-784 
    ISSN: 1040-0397
    Keywords: Oxygen reduction ; Electrocatal ytic layers ; Glucose ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Catalytic layers of a cobalt tetraphenylporphyrin/polystyrene composite coated on a glassy carbon electrode are shown to allow the reduction of oxygen at less negative potentials than at the bare electrode. When this layer was overcoated with a glucose oxidase (GOD) layer, the glucose could be determined under aerobic conditions. A similar ferrocene/polystyrene composite overcoated with a glucose oxidase layer allowed the determination of glucose under anaerobic conditions.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 11 (1988), S. 366-370 
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: When dealing with high purity gas handling, the nature of metallic surfaces in contact with the gas is a major concern because these surfaces are a possible source of gaseous pollution. Several surface treatments may be applied to stainless steel tubes used in gas handling systems, and these lead to different desorption properties. A comparison of the topographical effects accomplished by roughness and SEM measurements, and chemical effects by XPS determinations was made. Results were correlated to the outgassing behaviour of 316-L SS surfaces, as determined by thermal desorption mass spectroscopy. It appears that similar treatments of 316-L SS may not result in similar outgassing properties. Electropolished surfaces are smoother and present the least outgassing, although carefully cold drawn and chempolished stainless steel surfaces also show a comparable outgassing behaviour.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 25 (1987), S. 996-997 
    ISSN: 0749-1581
    Keywords: 1H NMR ; WATR ; Water suppression ; Ammonium chloride ; Guanidinium chloride ; Buffer salts ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The WATR method for water suppression in 1H NMR spectroscopy has been evaluated at 80 MHz, using both ammonium and guanidinium chloride, with and without the addition of buffer salts. The pH of maximum effect has been found to depend on field strength and to be markedly affected by buffer salts, particularly phosphates. Provided that the pH is carefully controlled the method is simple and effective.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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