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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 87 (1983), S. 2460-2462 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 88 (1984), S. 1605-1608 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 4440-4442 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of electron cyclotron resonance plasma cleaning on the contact resistance between a superconducting Nb layer and a two-dimensional electron gas in a strained InxGa1−xAs/InP heterostructure is investigated. Cleaning by a He/H plasma results in a rough semiconductor surface and a high interface resistance. In contrast, by using a pure He plasma a smooth semiconductor surface with a considerably lower interface resistance is obtained. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 391-393 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The critical current of a Nb–InGaAs/InP Josephson junction is increased stepwise by light exposure. Shubnikov–de Haas effect measurements under illumination show that the increase of the critical current originates from photogenerated electrons in the quantum well. A further enhancement of the critical current is gained under continuous illumination. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 2489-2496 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Far IR rotational transitions between the four lowest rotational levels in the X 3Σ− vibronic ground states of OH+ and OD+ have been observed by laser magnetic resonance spectroscopy. Ground state molecular constants, including the three g factors, have been determined and employed in the calculation of a Born–Oppenheimer equilibrium geometry. The centrifugal distortion of the spin-rotation interaction is found to have a significant effect on the determination of other molecular constants. Hyperfine splittings have been resolved and analyzed for OH+, but could not be observed in OD+ spectra with a 6 MHz collision-broadened linewidth.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 1252-1260 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Nine rotational transitions of v=0 X˜ 2B1 H2O+ have been measured by laser magnetic resonance. Optical combination differences have been combined with the LMR data in a weighted least-squares analysis using a Watson S-reduced rotational-fine structure Hamiltonian. Twenty-four molecular constants were simultaneously determined, including three hyperfine parameters and the axial components of both the anisotropic and rotational g tensors. The anisotropic g tensors are compared with their calculated values using the Curl relationship. An r0 structure was determined and is in good agreement with several ab initio results.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Der Onkologe 2 (1996), S. 359-364 
    ISSN: 1433-0415
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1433-0458
    Keywords: Schlüsselwörter Kopf-Hals-Krebs ; Radiochemotherapie ; Prognostische Marker ; Hämoglobinwert ; Tumorvolumen ; Tumoroxygenierung ; Keywords Head and neck cancer ; Hemoglobin ; Tumor volume ; Tumor oxygenation ; Chemoradiation ; Prognostic factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract The pretherapeutic hemoglobin level (Hb) has been postulated to constitute a prognostic marker for outcome after primary chemoradiation of patients with advanced cancer of the head and neck. However, this hypothesis has not been tested systematically in large study samples. In the years 1992–1997, 125 patients with advanced head and neck cancer (stages III/IV UICC) were treated with primarychemoradiation in two different prospective multicentric trials, 62 patients in trial A (phase II, 1992–1995), and 63 in trial B (phase III, 1995–1997). Beside initial Hb, other pretherapeutic parameters with potential prognostic relevance were assessed and correlated with clinical outcome after 43-months follow-up: total tumor volume (TTV; calculated in initial CT scans), tumor oxygenation (polarographic measurements with Eppendorf histography), TNM, tumor localization, age, and performance status. The evaluation of the clinical end points (progression-free and overall survival and local tumor control) revealed that Hb and TTV were independent parameters with strong predictive character of outcome after primary chemoradiation in both trials (n=125). Bivariate analysis showed 〈 median (13.5 g/dl) a hazard ratio of 2.1 (P=0.002) for Hb; and 〉 median (98 ml) a Hazard ratio of 2.0 (P=0.006) for TTV. Severe anemia (Hb〈10 g/dl) was an adverse factor in three patients. Hypoxia was associated with poorer initial therapeutic response but was not predictive of clinical outcome. Furthermore, tumor oxygenation showed no correlation with Hb. The other parameters examined failed to show prognostic significance. Our results indicate a high prognostic value of initial Hb for outcome after primary chemoradiation in advanced head and neck cancer and imply a therapeutic benefit of Hb substitution or erythropoietin administration. We propose to test this in randomized clinical trials.
    Notes: Zusammenfassung Der prätherapeutische Hämoglobin-Wert (Hb) wird als einer der wichtigsten Einflussgrößen für den Erfolg einer Strahlentherapie diskutiert; wurde jedoch bislang im klinischen Kontext anderer Risikofaktoren bei fortgeschrittenen Kopf-Hals-Tumoren kaum systematisch untersucht. In den Jahren 1992–1997 wurden in Kooperation der Universitäts-HNO- und -Strahlenklinik Heidelberg 2 prospektive multizentrische Studien zur primären Radiochemotherapie bei nichtresektablen Stadium-III/IV-Kopf-Hals-Karzinomen durchgeführt, in deren Rahmen insgesamt 125 Patienten behandelt wurden (Studienleitung: Herr Prof. Dr. R.-P. Müller; Köln). Studie A (Phase II, 1992–1995) rekrutierte 62 und Studie B (Phase III, 1995–1997) 63 Patienten. Neben dem Ausgangs-Hb-Wert wurden weitere, als prognostisch wichtig eingestufte klinische Parameter wie die Tumoroxygenierung, das Gesamttumorvolumen (total tumor volume, TTV), TNM, Tumorlokalisation, Alter und “performance status” erfasst und bezüglich ihres prädiktiven Wertes überprüft (Nachbeobachtungszeit 43 Monate). In der Gesamtbetrachtung (125 Patienten) setzten sich der Hb-Wert und das TTV als die stärksten, von einander unabhängigen, prognostischen Parameter, bezogen auf die Endpunkte Überleben und lokoregionäre Kontrollzeit, durch (bivariate Analyse: Hb〈Median (13,5 g/dl): Hazard-Ratio: 2,1 (p=0,002); TTV〉Median (98 ml): Hazard-Ratio: 2,0 [p=0,006]. Bei nur 3 Patienten wurde eine Anämie mit Hb-Werten unter 10 g/dl gesehen. Die Tumoroxygenierung zeigte lediglich eine signifikante Korrelation mit dem initialen Therapieansprechen, die sich in den klinischen Verläufen nicht widerspiegelte. Eine Korrelation zwischen Hb-Werten und Tumoroxygenierungsparametern konnte nicht gesehen werden. Die Ergebnisse der Studie unterstreichen die hohe klinische Bedeutung des Ausgangs-Hb-Wertes für den Erfolg nach primärer Radiochemotherapie von fortgeschrittenen Kopf-Hals-Tumoren und unterstützen die Forderung nach randomisierten Studien zur Prüfung der Wertigkeit der prätherapeutischen Hb-Substitution bzw. -Anhebung durch Erythropoietin.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Der Onkologe 3 (1997), S. 636-641 
    ISSN: 1433-0415
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Während in den Frühstadien des Ösophaguskarzinoms die Operation zu bevorzugen ist und, nach erheblicher Senkung der perioperativen Mortalitätsdaten, die zu erreichenden Überlebensraten ermutigend sind, resultieren nach Operation und/oder Bestrahlung der fortgeschritteneren Tumoren (〉T1-2) hohe lokale Rezidivraten und die langfristige Prognose ist derzeit gleichbleibend schlecht. Es soll im Folgenden eine komprimierte Übersicht und Bewertung der derzeit praktizierten und künftig möglichen radioonkologischen Therapiestrategien beim Ösophaguskarzinom gegeben werden. Die bisher kontinuierlich insgesamt mäßigen Therapieergebnisse und die schlechte Prognose der fortgeschritteneren Tumoren bekräftigen die Motivation der Kliniker auf der Suche nach multimodalen Therapiekonzepten, die in einer Wirkungssteigerung der bisherigen Basiskonzepte (Chirurgie - Strahlentherapie) resultieren sollen.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-1173
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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