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  • 1990-1994  (6)
  • 1975-1979
  • 1920-1924
  • 1905-1909
  • 1840-1849
  • 1993  (6)
Material
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  • 1990-1994  (6)
  • 1975-1979
  • 1920-1924
  • 1905-1909
  • 1840-1849
Year
  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 3434-3436 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The transverse-optical (TO) phonon energy in strained InAs quantum wells has been investigated by using far-infrared absorption. We observe that the TO phonon energy decreases when the misfit-induced biaxial tension in the InAs single quantum well is increased. Our result shows a stronger phonon energy dependence on the strain than the one reported by Cerdeira et al. [Phys. Rev. B 5, 580 (1972)]. The discrepancy may be explained by stress relaxation near the surface in their experiment. The application of our result will be discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 949-951 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The InAs/GaSb materials system, with different species for both cations and anions, allows one to envision the construction of heterojunctions with either InSb- or GaAs-like interfaces. As a result, this system provides a unique opportunity to explore the limits of interfacial control that can be achieved at the monolayer level by vapor phase growth techniques. Using migration-enhanced epitaxial techniques, we have prepared a series of InAs/GaSb superlattices with both types of interfaces. The large differences in bond lengths and vibrational properties of InSb and GaAs interfaces allow x-ray diffraction and Raman spectroscopy to be sensitive probes of interfacial structure. The x-ray and Raman measurements reveal that it is possible to grow superlattices with almost pure InSb-like or GaAs-like interfaces.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Biochemistry 32 (1993), S. 10543-10552 
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Cambridge University Press
    International organization 47 (1993), S. 77-106 
    ISSN: 0020-8183
    Source: Cambridge Journals Digital Archives
    Topics: Political Science
    Notes: In spite of its widespread use, no one has ever stated clearly what the distinction between bipolar and multipolar systems refers to. Moreover, some common definitions of “bipolarity” imply behavior that is inconsistent with the behavior of states during the cold war. This article argues that the distinctive feature of post–World War II international politics was not that two states were more powerful than the others, as the literature on bipolarity would suggest, but that one state, the Soviet Union, occupied in peacetime a position of near-dominance on the Eurasian continent, a position that states in the past had been able to achieve only after a series of military victories. This fact explains the behavior that others have sought to explain by bipolarity, as well as behavior that is inconsistent with what common definitions of bipolarity would lead us to expect. The article concludes with a discussion of the implications of the argument for structural theories of international politics and controversies about what lies ahead.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 49 (1993), S. 1342-1345 
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Intensive care medicine 19 (1993), S. 215-220 
    ISSN: 1432-1238
    Keywords: Aminoglycosides ; Drug monitoring ; Netilmicin ; Peak concentration ; Once daily treatment ; Thrice daily treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objectives To investigate at what time the peak level should be determined under conventional thrice daily (t.i.d.) administration of the aminoglycoside netilmicin and to study its serum concentrations under once daily (od) treatment to define the required daily dose and to gain information about convenient drug monitoring. Design The design of the study was a consecutive sample trial. Setting The study took place in a university hospital. Patients 41 intubated patients of a surgical ICU who received netilmicin as a short-term infusion over 30 min for life-threatening infections were included in the study. Interventions In 21 patients netilmicin was administered t.i.d. The virtual peak levels which had been determined by pharmacokinetic dosage calculation were compared with the serum concentrations obtained directly after the administration as well as after 15, 30, 60 and 180 min. In 20 patients the netilmicin serum concentrations during od treatment were determined directly before and immediately after the application as well as 0.5, 1, 3, 7 and 12 h later. To achieve a virtual peak level of 25 mg/l and a trough level of 0.5 mg/l individual adjustment of the dosage based on pharmacokinetic calculations was performed. Measurements and results In t.i.d. treatment the serum concentration measured after 30 min was closest to the virtual peak level; therefore, this is the best time to determine the peak level. In od treatment the required daily dose was 7.86 mg/kg body weight (median) in patients with normal renal function. During od dosing the trough level was extremely important in drug monitoring, whereas determination of the high peak level was of doubtful value. Conclusions The peak level should be determined during t.i.d. administration at 30 min. In od treatment the initial daily dose should be 7 mg/kg body weight; in drug monitoring the trough level is very important.
    Type of Medium: Electronic Resource
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