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  • 1
    Digitale Medien
    Digitale Medien
    1. Einführung (1977)
    Springer
    Langenbeck's archives of surgery 345 (1977), S. 35-38 
    Details
    ISSN: 1435-2451
    Schlagwort(e): Carcinoma, breast ; Breast cancer, operative treatment ; Mamma-Carcinom, Operativer Beitrag zur Therapie des Brustdrüsenkörpers ; Geo-Statistik der Operations-Verfahren
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: ZusammenfaBung Das Mamma-Carcinom liegt in der Bundesrepublik Deutschland mit dem Dickdarmcarcinom dicht nebeneinander an 2. und 3. Stelle. Ein entscheidender Wandel in der Therapie ist unseren chirurgischen Vorvätern aus einer Zeit vor rund 100 Jahren (Dieffenbach, Rotter, Halsted) zu verdanken, die aufgrund beBerer KenntniBe der lymphatischen Anatomie begannen, die axillären Lymphknoten und die Brustmuskeln zu entfernen. Weder die VergröBerung des Eingriffs (superradikales Verfahren) noch die Verkleinerung der Eingriffe (Enucleation, partielle Mastektomie) haben sich bisher gegenüber den ausgedehnteren Verfahren als überlegen erwiesen. Eine Statistik aus rund 1000 verschiedenen chirurgischen Kliniken zeigt die Verteilung der Operationsverfahren in der westlichen Welt. Bei den reduzierten Operationsverfahren (z. B. Enucleation) besteht besonders die Gefahr, daB der verständliche Wunsch nach der erstrebenswerten Kosmetik auf Kosten der Heilchance geht.
    Notizen: Summary In the German Federal Republic, carcinoma of the breast and colon lie close together as the second and third most tumors. We owe to our surgical forefathers of 100 years ago, Dieffenbach, Rotter, and Halsted, the decisive therapeutic advance whereby as a result of a better understanding of the anatomy of lymphatic drainage, excision of axillary glands and pectoralis muscle was first untertaken. Neither increasing the extent of the operation (superradical excision) nor reducing it (enucleation, partial mastectomy) has so far with any certainly proved as effective as radical mastectomy. The prevalence of various operations used in the western world was ascertained from a survey of about 1000 surgical clinics. With leB extensive operations (enucleation) there is the special danger that the understandable desire to strive for a cosmetic result may vitiate the chance of cure.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01305440
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  • 2
    Digitale Medien
    Digitale Medien
    Photofragment spectroscopy of N 2 + in the near UV (1990)
    Springer
    The European physical journal 15 (1990), S. 151-159 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 33.80 ; 35.20
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Photofragment spectroscopy of N 2 + has been studied in the wavelength range 343–404 nm using an excimer-pumped dye laser with a spectral resolution of 0.2 cm−1. The observed bands are assigned to transitions from thev″=23−26 levels of theX 2Σ g + state to highlying rovibrational levels (v′≈46–48) of theB 2Σ u + state, forming quasibound (predissociating) states above the dissociation limit N+(3 P)+N(4 S 0). Measurement of the photofragment kinetic energies allows to establish an absolute energy scale for the transitions with respect to the dissociation limit. Molecular constants for the lower and upper states of the observed transitions are determined. The measurements allow the first direct determination of the N 2 + dissociation energyD 0 0 (N 2 + ). Some high-resolution (0.04 cm−1) measurements show the fine-structure splitting and lifetime broadening of the excitation lines.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01437009
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  • 3
    Digitale Medien
    Digitale Medien
    Photofragment spectroscopy of SO+ in the wavelength range from 308–514.5 nm (1992)
    Springer
    The European physical journal 22 (1992), S. 727-734 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 33.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The direct photodissociation process SO++hv→S++O has been studied using the technique of ion photofragment spectroscopy. The kinetic energy distribution of the S+ photofragments has been measured for selected wavelengths in the range λ=308–514.5 nm. Transitions from the metastablea 4∏ state to the dissociative 14∑+ state as well as from theX 2∏ ground state to a higher-lying2∏ state have been observed. From the vibrationally resolved kinetic energy spectra, the potential curve of the repulsive 14∑+ state has been determined for the range of internuclear distancesR=3.0–4.5a 0. In addition, the analysis gives the vibrational population of the SO+ (a 4∏) ions after dissociative electron-impact ionization of SO2 in the low-pressure monoplasmatron ion source.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01437255
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  • 4
    Digitale Medien
    Digitale Medien
    Measurements of differential cross sections fore-Ar, Kr, Xe scattering atE = 0.05 − 2 eV (1988)
    Springer
    The European physical journal 7 (1988), S. 333-347 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 34.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Differential scattering experiments have been performed for the systemse-Ar, Kr, Xe in the energy rangeE=0.05 − 2 eV and the angular range ϑ=20–100° using a crossed-beam arrangement. The measurements cover the region of the Ramsauer-Townsend minimum (for the first time in differential scattering using modern techniques) and show the drastic variation of the cross section over this energy range. For these experiments, a new electron spectrometer has been developed which is especially designed to allow measurements at very low collision energies under well controlled conditions. In the present work, the measurements could be extended down to 50 meV. The energy resolution was ΔE = 10 meV (FWHM). Absolute cross sections and the correct transmission properties of the systems are determined usinge-He scattering as a reference system. The experimental data are analysed by the MERT method which allows to extrapolate the cross sections to zero energy. On the basis of the MERT parameters, detailed comparison is made with other work.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01439803
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  • 5
    Digitale Medien
    Digitale Medien
    Photofragment spectroscopy of molecular ions: design and performance of a new apparatus using coaxial beams (1988)
    Springer
    The European physical journal 8 (1988), S. 371-378 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 33.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A new apparatus is described for the study of photofragment spectroscopy of molecular ions in a coaxial laser-ion beam configuration. Complementary to other developments in this field, the apparatus emphasizes the kinetic energy spectroscopy of the photofragments and is particularly designed to study direct photodissociation processes via repulsive potential curves. On the laser side, the experiment uses discrete lines in the visible and UV region (Ar+ laser, excimer laser). A detailed analysis of the experimental conditions is presented, in particular with respect to the attainable energy resolution in the photofragment spectra. The apparatus provides sufficiently intense ion beams (5–10 nA) with controlled energy resolution (ΔE = 100−500 meV) and angular collimation (ΔΘ = 5−10 mrad). The measured photofragment spectra of H 2 + in the visible and UV region are in full accordance with the predictions of the design analysis.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01437104
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  • 6
    Digitale Medien
    Digitale Medien
    Direct photodissociation of SO+ via the 14Σ+ state (1989)
    Springer
    The European physical journal 13 (1989), S. 147-151 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 33.80
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The direct photodissociation process SO+ a 4Π +hv → S+ (4S0) + O(3P) via the repulsive SO+ 14Σ+ state has been studied using a laser-ion photofragment spectrometer with coaxial beams. The kinetic energy distribution of the S+ photofragments has been measured at a laser wavelength of λ=488 nm (hv=2.54 eV). The spectrum shows vibrational structure which can be assigned to transitions from the vibrational levelsv = 7–13 of the initiala 4Π state. The experimental data are used along with semi-empirical calculations to locate the potential curve of the repulsive 14Σ+ state in the Franck-Condon region. The results are compared with data obtained from photopredissociation studies of SO+ and with theoretical calculations for the 14Σ+ state.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01398584
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