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  • 1990-1994  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Negative-ion formation from positive ion by two-electron transfer from an alkali-metal target (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1958-1965 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: To examine two-electron transfer producing negative ions from positive ions, an apparatus using an alkali-metal target has been developed. Positive ions formed by electron impact in an ion source collided with alkali-metal vapor in a target chamber. Negative ions formed by two-electron transfer have been analyzed with a single-focusing mass spectrometer. Precursor positive ions and product negative ions have been identified from the apparent masses in the negative-ion spectra. Using the target density dependence of the negative-ion intensity, the processes of negative-ion formation were determined to be double-electron transfer in one collision or successive single-electron transfer in two collisions. The cross section of these processes has been estimated from the peak area of positive- and negative-ion spectra and the target density evaluated using the vapor-pressure curve as a function of the temperature of the alkali-metal cell. A cross section for He−-ion formation in the Cs target with successive single-electron transfer have been evaluated to be 1.40×10−30±0.2 cm4 at a collision energy of 2.0 keV, which showed the fair agreement with the values reported by Donnally and Thoeming [Phys. Rev. 159, 87 (1967)]. The double-electron transfer cross section for C2−-ion formation from a C2+ ion with a Cs target has been evaluated as 7.03×10−18±0.1 cm2 at 3.0 keV. For O−-ion formation from O2+ ions, four broad peaks were observed due to the kinetic energy releases at dissociation which were 7.3, 3.4, 1.1, and 0.014 eV at full width at half maximum. Since the kinetic energy releases of the broad peaks corresponded with those by Peterson and Bae [Phys. Rev. A 30, 2807 (1984)], the peak extents have been explained as the dissociations of the excited neutral formed from exothermic neutralization. This two-electron transfer from an alkali-metal target offers a good advantage for the determination of the dissociation mechanism for excited neutral particles by means of the negative-ion detection method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143311
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Correlative evaluation of serum lipid, blood glucose, blood pressure, serum immunoreactive insulin, and liver function in persons undergoing regularly scheduled health evaluations (1993)
    Springer
    Journal of medical systems 17 (1993), S. 195-199 
    Details
    ISSN: 1573-689X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two hundred and thirty eight persons were examined to evaluate the interrelations among seven key factors for arteriosclerosis: body mass index (BMI), systolic blood pressure (BPs), plasma glucose (PG), serum cholesterol (CHO), serum triglyceride (TG), serum glutamic-pyruvic transaminase (SGPT), and serum insulin (IRI). BPs showed the significant positive correlation with PG (r=0.346), BMI (r=0.318), and IRI (r=0.200).However, there were no significant correlations between BPs and CHO, between BPs and TG, between BPs and SGPT. SGPT showed the significant positive correlation with IRI (r=0.367), BMI (r=0.268), and TG (r=0.343); but no significant correlations were observed in relations between SGPT and PG, between SGPT and BPs, between SGPT and CHO. IRI showed the significant positive correlations with TG (r=0.234), and PG (r=0.427). These data suggest that IRI has an effect on BPs and SGPT. The effect of IRI on BPs relates with PG but does not relate with serum lipid. The effect of IRI on SGPT relates with TG but not with PG.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00996945
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Book reviews (1990)
    Springer
    Space science reviews 54 (1990), S. 187-194 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00168022
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Book reviews (1991)
    Springer
    Space science reviews 57 (1991), S. 189-192 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00195953
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    Paper (German National Licenses)
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