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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Annals of oncology 11 (2000), S. 807-813 
    ISSN: 1569-8041
    Keywords: adjuvant chemotherapy ; clinicians' opinions ; non-small-cell lung cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background:The results of the Italian part of an internationalsurvey on therapeutic preferences and opinions about prognosis of patientsaffected by non-small-cell lung cancer (NSCLC) are shown. Patients and methods:The investigation was conducted by the meansof a postal questionnaire aiming to gather information on preferences abouttreatment and beliefs about survival of three hypothetical patients affectedby NSCLC in different stages (T2N1M0,T2N3M0, M1); three sources ofItalian physicians potentially treating patients affected by NSCLC were thetarget population: participants in the Adjuvant Lung Project Italy (Alpi)trial, a 20% random sample of the Italian Medical Oncology Association(AIOM) and representatives of almost all the pneumology wards in Italy. Results:Overall, there were 287 evaluable responses, 89%of respondents were males, mean age was 46 years, years from graduation 21 andcharge of patients per clinician 82. The most important result is the widevariation of answers both about therapy and prognosis. Expectations about sizeof prognosis improvement with a new chemotherapy seem to be excessive. Conclusions:The results are discussed in relation to the twinsurveys of Canada and England and Wales and to the meta-analyses on theefficacy of chemotherapy as an adjunct to primary treatment and onpostoperative radiotherapy in non-small-cell lung cancer.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung 1. Bei Eingriffen an den Lungen scheint die Größe des Eingriffs für die postoperativen Änderungen der Enzymaktivitäten der GOT, LDH und MDH im Serum keine Rolle zu spielen. Die Aktivität der GPT ändert sich offensichtlich überhaupt nur wesentlich, wenn postoperativ Komplikationen auftreten. 2. Ein eindeutiger Unterschied des Verhaltens der hier untersuchten Enzymaktivitäten im Serum nach Probethorakotomie, Operationen an den Lungen und Sprengung der Mitralstenose ergab sich nicht. 3. gilt dasselbe bezüglich des Unterschiedes zwischen digitaler und instrumenteller Sprengung der Mitralstenosen. Kleinere Differenzen der LDH- und MDH-Aktivität müssen auf ihre Stichhaltigkeit durch eine größere Zahl von Untersuchungen nachgeprüft werden. 4. Für die Aufdeckung postoperativer Komplikationen bedeuten die Aktivitätsmessungen von Enzymen im Serum eine gute, manchmal entscheidende Hilfe. 5. Für die Frühdiagnose des Bronchialcarcinoms hilft die Messung der GOT-, GPT-, LDH- und MDH-Aktivität im Serum nichts.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    International journal of infrared and millimeter waves 14 (1993), S. 2203-2219 
    ISSN: 1572-9559
    Keywords: resonance phototunneling ; heterojunction ; spectral photosensitivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Photoelectric properties and current-voltage characteristics ofpInSb-nCdTe heterojunction have been studied as a function ofnCdTe layer thickness. Spectral dependence of photoconductivity has been found, as well as the junction field penetration domain innCdTe. Various mechanisms of charge separation are considered: resonance phototunneling mechanism, and absorption mechanism with further tunneling through the barrier, which explains the character of spectral dependence for the photoconductivity both beyond the maximum of spectral dependence and beyond edge of fundamental absorption forpInSb. By the photoconductivity fall-off we have determined the concentration of impurity ND, which stays in good agreement with the ND value determined from measurements of field penetration depth. Possibilities of extending the photosensitivity to higher wavelengths range are discussed, by variation of impurities concentrations NA and ND, and by means of the external electrical field.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    International journal of infrared and millimeter waves 21 (2000), S. 1859-1868 
    ISSN: 1572-9559
    Keywords: Raman scattering ; quantum confinement ; magnetic field
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Two-photon and three-photon Raman scattering processes are considered. Analytical expressions are derived for the non-linear susceptibility, gain coefficient and generation threshold. It is shown that the resonant fluorescence accompanies the Raman scattering and the hot luminescence processes when the finite population of states is taken into account. Numerical evaluations show that the specification of the medium leads to low generation thresholds and high magnitudes of gain coefficients.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    International journal of infrared and millimeter waves 14 (1993), S. 2149-2154 
    ISSN: 1572-9559
    Keywords: guantum-well heterostructure ; refraction index ; generation threshold
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The resalts of theoretical investugation for spectral characterstics of gain, refraction index of QW heterostructures depending on quantum layer thickness the value of saturation field, as well as their field dependence are presented.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    International journal of infrared and millimeter waves 21 (2000), S. 1851-1857 
    ISSN: 1572-9559
    Keywords: self-induced transparency ; pulse ; 3D-quantization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The possibility of self-induced transparency is discussed in a semiconductor structure with 3D-quantized electron spectrum. A model structure is proposed, for which a significant decrease of pulse duration and an increase of power is obtained.
    Type of Medium: Electronic Resource
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