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  • 1995-1999  (4)
  • 1985-1989
  • 1996  (4)
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  • 1995-1999  (4)
  • 1985-1989
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  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 7068-7072 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Highly efficient population transfer between the (0,0,0) and the (9,1,0) vibrational levels of the electronic ground state X˜ 1A1 of SO2 is demonstrated. The process relies on stimulated Raman scattering with adiabatic passage induced by two suitably delayed ultraviolet laser pulses with nearly transform-limited bandwidth. A transfer efficiency of 100% is achieved. The associated dark resonance is observed. Properties of the latter are compared for delayed and fully overlapping pulses. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1041
    Keywords: Key words Hyperlipoproteinaemia ; Fenofibrate; fenofibric acid ; sex differences ; long-term treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: We studied possible sex differences of the effect of fenofibrate on serum lipoproteins. Twenty-three patients with primary hypercholesterolaemia (10 postmenopausal women and 13 aged-matched men) were treated with slow-release fenofibrate for 96 weeks. Results: Steady state lipoprotein concentrations were reached after 12 and 24 weeks of treatment in women and men, respectively. During the subsequent follow-up the lipoprotein concentrations remained constant. In women total and low-density lipoprotein (LDL) cholesterol decreased from 299 to 234 mg⋅dl−1 and from 210 to 151 mg⋅dl−1, respectively, and in men from 265 to 233 mg⋅dl−1 and from 192 to 160 mg⋅dl−1. The decrease in triglycerides was also more pronounced in women (−42%) than in men (−18%). High-density lipoprotein (HDL) cholesterol increased significantly in women from 53 to 63 mg⋅dl−1 but not in men (45 to 50 mg⋅dl−1). Since the changes in LDL and HDL cholesterol occurred in opposite directions, the decrease in LDL/HDL cholesterol ratio was accentuated in both groups. However, this ratio was decreased almost twofold in women (−41%) compared to men (−23%). Although the serum concentrations of fenofibric acid were 1.3-fold higher in women than in men, which was probably due to the higher body weight in men (1.2-fold), this difference can hardly explain the favorable effect on lipoproteins in women. Conclusion: The present study indicates that fenofibrate might be very effective by reducing the concentrations of atherogenic lipoproteins in postmenopausal women.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Optical and quantum electronics 28 (1996), S. 241-259 
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Compact pinch plasma devices are intense sources of pulsed EUV radiation with output energies of several joules per pulse in single lines. Their spectrum peaks in a wavelength range where conventional x-ray tubes provide poor intensity. With correct optimization, both continuous radiation or line radiation with λ/Δλ 〉 1000 can be produced for broadband and narrowband applications, respectively. Because of their low cost and their compact size, pinch plasmas seem well suited to supplement research activities based on synchrotron radiation. In this paper, pinch plasma sources developed for x-ray lithography and x-ray microscopy are described. Their emission characteristics are optimized with regard to specific requirements given by the particular application and are compared to laser produced plasmas. The lithography source is compatible with the electron storage ring printing process with respect to its spectrum and enables full-depth exposures in 1-μm-thick 60 mJ cm-2 sensitivity resist at resolution below 0.2 μm within 10 minutes. The source for microscopy applications enables flash imaging of biological specimens with suboptical resolution (0.1–0.2 μm) at nanosecond exposure times. In addition, the averaged plasma parameters meet the requirements for an EUV laser medium. The nitrogen 2–3 transition is especially promising for achieving amplified spontaneous emission of hydrogen-like or helium-like ions excited by three-body or charge exchange recombination.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 356 (1996), S. 57-61 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A simple and reliable analytical method for the determination of organolead compounds in water samples has been developed by means of a gas chromatographic-atomic absorption system (GC-AAS). The derivatization of the organolead cations, necessary before their determination, was directly achieved in the water samples by the reagent tetrabutylammonium tetrabutylborate. Hexane/pentane was used to extract the butylated tetraorganolead compounds. The organic layer was dried and purified with sodium sulfate, concentrated by evaporation and injected into a GC-AAS system. The effects of various parameters on the derivatization and extraction procedures were studied and discussed.
    Type of Medium: Electronic Resource
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