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  • 1
    Electronic Resource
    Electronic Resource
    Das maligne „Marjolin Ulcus“ als seltene Komplikation eines thermischen Traumas an der oberen Extremität (2000)
    Springer
    Der Unfallchirurg 103 (2000), S. 68-72 
    Details
    ISSN: 1433-044X
    Keywords: Schlüsselwörter ,“Marjolin Ulcus“• Kombinationstherapie • Fallbericht ; Key words Marjolin's ulcer • Combined therapy • Case report
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The ,,Marjolin's ulcer” is a malignant lesion which is developed especially at chronic wounds after burn trauma. The latency from primary trauma to the malignant transformation is about 30 years. The lesion is more aggressive than other squamous cell carcinomas. We report on the combined radiation and surgical therapy of an 65-year-old patient with this lesion on the right hand and regional lymph node metastases. The extensive tissue defect after wide excision was reconstructed with a reversal radial forearm flap.
    Notes: Zusammenfassung Als„Marjolin Ulcus“ bezeichnet man maligne Transformationen chronischer Wunden insbesondere nach Verbrennungstraumen. Die Latenzzeit zwischen dem Primärtrauma und der malignen Transformation beträgt etwa 30 Jahre. Das„Marjolin Ulcus“ zeichnet sich durch ein aggressiveres Verhalten gegenüber anderen Plattenepithelkarzinomen aus. In einem Fall eines 65 jährigen Patienten mit der Läsion am rechten Handrücken und regionalen Lymphknotenmetastasen berichten wir über die kombinierte Strahlen- und chirurgische Therapie. Der ausgedehnte Weichteildefekt nach entsprechend breiter lokaler Exzision wurde mit einem retrograd gestielten A. radialis-Lappen gedeckt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001130050010
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of Estrogen and Progesterone on Tibia Histomorphometry in Growing Rats (2000)
    Springer
    Calcified tissue international 67 (2000), S. 47-52 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Bone formation — Bone resorption — Osteoporosis — Bone growth — Ovariectomy.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. The present study was performed to evaluate possible interactions between estrogen and progesterone on peak cancellous bone mass. Ovariectomized (OVX) growing rats were treated with 17β-estradiol (4.8 μg/day), progesterone (4.8 mg/day), a combination of the two sex steroids, or with vehicle for 14 days beginning 7 days after OVX. The tibiae were removed for histomorphometric analysis of the proximal metaphysis. OVX and growth each resulted in net resorption of cancellous bone at a sampling site adjusted for longitudinal bone growth. Estradiol and progesterone treatment each antagonized bone loss by inhibiting the decrease in trabecular number. Estradiol increased but progesterone had no effect on trabecular thickness. Progesterone did not influence either osteoclast number or the resorption of the pretreatment fluorochrome label. Estradiol reduced osteoclast number and inhibited label resorption, the latter change being accentuated by combination treatment. Estradiol reduced and progesterone enhanced the mineral apposition and bone formation rates. The results indicate that estradiol and progesterone have independent activities on cancellous bone turnover during growth. Whereas estradiol reduced bone turnover, progesterone had a stimulatory effect on bone formation. These findings suggest that progesterone has a role in establishing and maintaining peak cancellous bone volume during growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00223001096
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  • 3
    Electronic Resource
    Electronic Resource
    Nuclear effects on the extraction of neutron structure functions (2001)
    Springer
    The European physical journal 20 (2001), S. 63-70 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Nuclear effects due to the presence of spin-1 isosinglet 6-quark clusters in the deuteron on the extraction of both spin-independent and spin-dependent neutron structure functions are investigated. The x-dependences of the 6-quark cluster structure functions are estimated by using a perturbative QCD (pQCD) dimensional counting rules. Within this framework, the ratio of the deuteron structure function to the free nucleon structure function can be well described. We find that the nuclear effect on the extracted spin-dependent neutron structure function is very different from that on the spin-independent neutron structure function. The effect enhances the Bjorken sum by about 10%, whereas it decreases the Gottfried sum by about 7%. The formalism for calculating nuclear effects is further used to evaluate the spin-dependent structure function of the $^3$ He nucleus and a good self-consistent check is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100520100647
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  • 4
    Electronic Resource
    Electronic Resource
    $\Lambda, \bar{\Lambda}$ polarization and spin transfer in lepton deep-inelastic scattering (2000)
    Springer
    The European physical journal 16 (2000), S. 657-664 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The flavor and helicity distributions of the $\Lambda$ and $\bar{\Lambda}$ hyperons for both valence and sea quarks are calculated in a perturbative QCD (pQCD) based model. We relate these quark distributions to the fragmentation functions of $\Lambda$ and $\bar{\Lambda}$ , and calculate the z-dependence of the longitudinal spin transfer to $\Lambda$ and $\bar{\Lambda}$ in lepton deep-inelastic scattering (DIS). It is shown that the spin transfer to the $\Lambda$ is compatible with the first HERMES results at DESY, and further tests are suggested. We also make predictions for the z-dependence of the $\Lambda$ and $\bar{\Lambda}$ longitudinal polarizations in neutrino (antineutrino) DIS processes. We investigate the sea contribution to the fragmentation functions, and we test a possible scenario where the sea quarks in $\Lambda$ (or the sea antiquarks in $\bar{\Lambda}$ ) are negatively polarized, whereas the sea antiquarks in the $\Lambda$ (or the sea quarks in $\bar{\Lambda}$ ) are positively polarized. The asymmetry of the polarized fragmentation functions of the sea quarks and antiquarks to $\Lambda$ and $\bar{\Lambda}$ provides a way to understand the different behavior between the $\Lambda$ and $\bar{\Lambda}$ spin transfers observed in the recent E665 experiment at FNAL.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100520000447
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