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  • 1
    Electronic Resource
    Electronic Resource
    AC corona-discharge aerosol-neutralization device adapted to liquid chromatography/particle beam/mass spectrometry (1995)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 9 (1995), S. 138-142 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: An AC corona-discharge device was inserted upstream of a thermospray vaporizer tip in a liquid chromatography/particle beam mass spectrometer to neutralize static aerosol charging. Response of a test analyte was measured with or without discharge initiation. If the solvent contained no ammonium acetate buffer, increased analyte signal was associated with the discharge. However, in the presence of ammonium acetate the benefit of AC discharge neutralization was either not observed or was more subtle. This led to the conclusion that the previously observed ammonium acetate “carrier” effect is attributable, at least in part, to neutralization of static electric charges produced spontaneously during the solvent nebulization process. In a second experiment, the pattern of particles issuing from the system momentum separator was examined by aiming the particle beam at a cold target located within a mass spectrometer ion source. Variations in particle density were observed depending on (i) whether or not the aerosol had been neutralized and (ii) the proximity of electron-beam-collimating magnets to the particle beam trajectory. These results are consistent with a hypothesis that electrostatic charging occurs spontaneously during the nebulization process in which an aerosol is formed from the high performance liquid chromatography effluent. Such electrostatic charging introduces a factor likely to degrade system performance by at least two modes: through interactions of the charged aerosol particles (i) with the walls of the aerosol transmission pathway, and, after they are accelerated into a particle beam and introduced into the mass spectrometer, (ii) with the magnets used for electron beam collimation in many mass spectrometer ion sources.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290090207
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  • 2
    Electronic Resource
    Electronic Resource
    New organic resins and reinforced laminates for service to 300°C (1962)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 2 (1962), S. 216-221 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Demand for structural insulating materials for service in high temperature environments is widespread and the performance characteristics of special grades of silicone or phenolic-glass laminates at temperatures up to 250°C have been well documented. A new family of polymers, completely aromatic in structure, except for the amido coupling linkage, now shows promise of giving excellent performance at temperatures to at least 300°C in air. Comparative data concerning the retention of mechanical and electrical properties of such laminates after aging at the higher temperature is provided.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760020308
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Resins and reinforced plastic laminates for continuous use at 650°F (1965)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 5 (1965), S. 75-83 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: This article reports the preparation of a number of high molecular weight aromatic amide and imide polymers. An order of relative thermal stability of a series of alternative linkages between benzene rings in aromatic polymers is established on the basis of weight loss of thin films in air. It is found to agree with the stability order established by others by study of model compounds. It is further confirmed by the aging performance of laminates employing such resins. Electrical properties of the polymers were measured as a function of temperature. Change in the dissipation factor with temperature was used to determine Tg, which in turn was correlated to the minimum temperature required to produce laminates. Examples of the performance of these organic polymers in long time exposure tests at elevated temperature are given. Flexural properties of laminates aged and tested at temperatures of 600-650°F are reported.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760050203
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  • 4
    Electronic Resource
    Electronic Resource
    Phenolic Resin Chemistry. N. J. L. MEGSON. Academic Press, New York; Butterworths, London, 1958. 323 pp. $10.80. (1959)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 35 (1959), S. 564-565 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1959.1203512936
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  • 5
    Electronic Resource
    Electronic Resource
    Chemical ionization mass spectrometry of doxylamine and related compounds (1985)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 20 (1985), S. 435-439 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The chemical ionization mass spectrometric (CIMS) analysis of doxylamine, N,N-dimethyl-2-[1-phenyl-1-(2-pyridinyl)ethoxy]ethanamine, and related compounds, using both ammonia and methane as reagent gases, is discussed. The two reagent gases did not produce the same major fragment ion for doxylamine. Mechanisms for the fragmentation of doxylamine under either ammonia or methane CIMS conditions are proposed. The mechanisms explain the observation of an m/z 182 fragment ion for doxylamine analyzed under methane CIMS conditions and an m/z 184 product ion detected under ammonia CIMS conditions.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210200702
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    Paper (German National Licenses)
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