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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 297-298 (Dec. 1998), p. 79-86 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 17 (1995), S. 1699-1703 
    ISSN: 0392-6737
    Keywords: Electron states in low-dimensional structures (including quantum wells, superlattices, layer structures, and intercalation compounds) ; Localized single-particle electronic states (including impurities) ; III–V compounds and systems ; Photoluminescence ; Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We have performed time-integrated and time-resolved photoluminescence experiments on high-quality stressor-induced InGaAs/GaAs quantum dots. The optical spectra of these dot structures exhibit large quantization effects together with remarkably low inhomogeneous broadenings of the respective excitonic transitions. Thus a detailed investigation of the relaxation and recombination dynamics within the distinct electronic dot states becomes feasible. We find that the initial relaxation of optically generated carriers down to the lowest dot states is very efficient. This fast thermalization is ascribed to Coulomb scattering between carriers confined in dot states and carriers located in the higher-energetic quantum well states.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 3162-3175 
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A fluid model of surface wave produced discharges is presented for diffusion controlled regimes taking into account simultaneously nonlinear contributions from stepwise ionization and volume recombination. The saturation of metastable densities with growing electron density reduces the effect of step ionization and allows recombination to become effective toward high electron densities. The charged particle continuity and energy balance equations linking electron density and electric field intensity yield the plasma permittivity under conditions of strong ionization nonlinearity. This permittivity is valid for high frequency discharges in general. In the second part of the modeling this nonlinear permittivity is introduced into the electrodynamical relations for discharges maintained by the field of traveling surface waves, and subsequently the self-consistent behavior of plasma and wave characteristics along the discharge length is calculated. Both the main part of the discharge column produced by Joule heating in the plasma volume and the end section of the discharge, where the mechanism of resonance absorption of the wave power close to the tube wall can sustain the discharge, are considered. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The two photoluminescence bands typically observed in partially ordered (GaIn)P are studied with a spatial resolution of 270 nm by use of scanning near-field optical microscopy at low temperature. Local luminescence spectra show a strong spatial variation of the low energetic emission in lineshape and peak position whereas the same attributes of the high energetic emission differ only slightly for all investigated areas of the sample. The intensities of both photoluminescence bands are anticorrelated in space on a 0.5–1.5 μm scale. TEM investigations show that the structure of the sample is inhomogeneous on the same length scale. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 128 (1993), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The ability to assess the severity of dermatoses by measurement of area of involvement is important in both clinical practice and research. Using schematic figure outlines we have shown that physicians, nurses and other groups are unable to assess area accurately, and that the degree of error is partially dependent on absolute area, but also on other factors. The pattern and magnitude of the errors varied between the groups examined, but overall was such that it calls in question the use of area indices such as the PASI (psoriasis area and severity index) score in the assessment of inflammatory dermatoses.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 12 (1896), S. 398-398 
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on Sulphochlorination of Paraffins. I. Kinetic Studies on the Monosulphochlorination of the n-Paraffins C6—C16The monosulphochlorides in the reaction mixtures of the sulphochlorination of n-paraffins may be transformed into the gaschromatographic separable sulphonic acid dimethyl amides by reaction with dimethylamine in ether.So the analysis of the isomers in the mixtures from sulphochlorination of n-paraffins C5—C16 becomes possible. The results together with the relative rates of sulphochlorination of n-paraffins C6—C16 (determined by competitive reaction) allow the calculation of sulphochlorination rates of the different C—H-bonds in the n-paraffins C6—C16 relative to one primary C—H-bond in n-octane. For the n-paraffins C6—C8 the relative rates of sulphochlorination of different C—H-bonds agree with the corresponding relative rates of chlorination.
    Notes: Die in Sulfochlorierungsgemischen von n-Paraffinen enthaltenen isomeren Monosulfochloride lassen sich durch Umsetzen mit Dimethylamin/Äther in die gaschromatographisch trennbaren Sulfonsäuredimethylamide überführen. So ist die Isomerenanalyse der Sulfochlorierungsgemische aus den n-Paraffinen C5—C16 möglich. Die Ergebnisse sowie die durch Konkurrenzreaktion ermittelten relativen Sulfochlorierungsgeschwindigkeiten der n-Paraffine C6—C16 gestatten die Berechnung der auf eine primäre C—H-Bindung des n-Octans bezogenen relativen Sulfochlorierungsgeschwindigkeiten der verschiedenen C—H-Bindungen in den Paraffinen C6—C16. Bei den Paraffinen C6—C8 stimmen die relativen Reaktionsgeschwindigkeiten der verschiedenen C—H-Bindungen bei der Sulfochlorierung und bei der Chlorierung innerhalb der Fehlergrenzen überein.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
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