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  • 2000-2004
  • 1990-1994  (6)
  • 1965-1969  (4)
  • 1945-1949
  • 1935-1939
  • 1993  (6)
  • 1968  (4)
Material
Years
  • 2000-2004
  • 1990-1994  (6)
  • 1965-1969  (4)
  • 1945-1949
  • 1935-1939
Year
  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 562-564 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We find that even very low Ni doping levels of high-quality Bi2Sr2Ca1Cu2O8 single crystals strongly affect the transition temperature Tc. We also observed that Tc is not related to the total Ni concentration, but only to that of Ni engaged in NiO-type bonds. By controlling the temperature during crystal growth, one can modify the relative weight of Ni in NiO-type bonds with respect to other configurations—and therefore Tc.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 3916-3920 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Monocrystalline ZnSe/GaAs(001) heterostructures have been grown by atomic layer epitaxy with typical thicknesses up to 200 nm. The 1LO Raman spectrum of ZnSe and GaAs, respectively, was recorded in situ during growth interruptions. The spectra were analyzed with respect to Raman intensity, phonon frequency, and bandwidth. Two different growth modes are distinguishable: (i) The biaxial compressive strain in the epilayers is increased in the thickness range up to 40 nm due to lattice mismatch of the heterosystem. This can be interpreted as a transition from an initial 3D island to the 2D layer by layer growth. (ii) When larger thicknesses (40–170 nm) are reached the strain is constant and the 1LO Raman intensity from the epilayer and from the substrate oscillates significantly with thickness. These periodic oscillations are quantitatively described in the framework of interference-enhanced Raman scattering and verify the 2D growth mode in this thickness range. The crystalline quality and the final thickness of the samples were determined by transmission electron microscopy.
    Type of Medium: Electronic Resource
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  • 3
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    Unknown
    Berlin : Periodicals Archive Online (PAO)
    Orientalistische Literaturzeitung. 63:7/8 (1968:Juli/Aug.) 398 
    ISSN: 0030-5383
    Topics: Linguistics and Literary Studies , Ethnic Sciences , History
    Notes: Besprechungen
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  • 4
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 26 (1993), S. 532-538 
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The structures of superlattices on misoriented (001) substrates are described by means of two modified models. From both models, it can be concluded that there is an intensity distribution rod in the reciprocal space perpendicular to the surface and the symmetry of the diffraction pattern is reduced from tetragonal to monoclinic. However, in the first model the diffraction pattern near the substrate reflections and in the second model that near the so-called `average lattice' reflections remains tetragonal. Neglection of both of these facts can cause systematic errors in the determination of the lattice parameters of superlattices. These errors are estimated. Additionally, 60° misfit dislocations are discussed as a reason for the tilt of the layer system with respect to the substrate. The validity of the theoretical predictions was proved by X-ray diffraction studies on symmetric and asymmetric reflections on three GaAs/Ga1 − xInxAs superlattices grown on (001) GaAs. The first sample has a large misorientation and the diffraction behaviour corresponds to the above-mentioned models. The second sample shows a diffraction pattern that can be explained by a tilt of the layer system in relation to the substrate. The third sample has a large misorientation and a large tilt of the layer system and so its diffraction pattern shows an overlap of both effects.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 231 (1968), S. 161-169 
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An einem auslesefreien Material von 400 Basaliomexcidaten konnte in über 90% eine Verbindung von Tumorzellformationen mit der Oberflächenepidermis nachgewiesen werden. Die Ergebnisse stützen die Auffassung, daß Basaliome nicht von “versprengten” Keimen, sondern von Zellen ausgehen, die Beziehung zur Oberflächenepidermis besitzen. Unsere Befunde an Excidaten von Patienten mit multiplen Basaliomen erlauben den Schluß, daß zwischen “superfiziellen” und “profunden” Entwicklungsformen von Basaliomen kein prinzipieller Unterschied besteht. Beide sind möglicherweise durch Lokalfaktoren mitgeprägte Formvarianten des gleichen Tumors; zwischen den verschiedenen Formen gibt es fließende Übergänge. Bei Patienten mit multiplen sowie multiplen naevoiden Basaliomen fanden sich stets “superfizielle” und “profunde” Tumoren nebeneinander.
    Notes: Summary Among an unselected material of 400 Basalioma excisions in more than 90% a connection between tumor cell formations and the surficial epidermis could be detected. The results support the opinion that basaliomas do not have their origin in “scattered” cells, but in cells which are related to the surficial epidermis. Our findings in the excisions from patients suffering from multiple basaliomas have made us come to the conclusion that no essential difference exists between “superficial” and “profound” forms of development of basaliomas. Both are probably variations of the same tumor, formed by local factors, whereas fluent intermediate forms exist between those various forms. All our patients with multiple or nevoid multiple basaliomas had as well “profound” as “superficial” tumors.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1084
    Keywords: Percutaneous drainage ; Radiologic guidance ; Pleural emyemas/abscesses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Radiologically guided percutaneous catheter drainage was used in 38 patients to treat pleural empyemas (35 patients) and pulmonary abscesses (3 patients). Drainage was successful in 85.7% of empyemas including 11 cases with fistulous communications. Three percutaneously drained pulmonary abscesses required subsequent lobectomy. One patient died during the drainage procedure due to sepsis. No major complications related to the drainage procedure were observed. Guided percutaneous drainage proved to be a safe and successful alternative to closed drainage of pleural fluid collections.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 232 (1968), S. 56-65 
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über einen 1966 im Alter von 53 Jahren an Mycosis fungoides (M. F.) mit Übergang in Reticulumzellsarkomatose verstorbenen Patienten berichtet. Die Beobachtung gewinnt in Anbetracht der ungeklärten Ätiologie der M. F. dadurch an Interesse, daß ein ursächlicher Zusammenhang zwischen früherer Thorotrastanwendung und Auftreten der M. F. wahrscheinlich ist: 1936 war eine Carotisangiographie mit Thorotrast durchgeführt worden. Hauterscheinungen der M. F. traten erstmals 1948 auf. Autoptisch fanden sich 1966 neben typischen Mycosis-fungoides-Herden vor allem in tumorösen Hautveränderungen und in Lymphknoten Veränderungen einer Reticulumzellsarkomatose. Ausgedehnte Thorotrast-Depots waren vor allem in Leber und Milz nachweisbar; Einlagerung strahlender Substanz auch in Lymphknoten war schon einige Jahre vorher festgestellt worden. Wenn auch die Schwerpunkte der Mycosis-fungoides-Entwicklung nicht mit denen der Thorotrastablagerung übereinstimmen, erscheint doch nach dem klinischen Verlauf die Induktion der M. F. bzw. der aus ihr entstandenen Reticulumzellsarkomatose durch Thorotrast in Anbetracht der bekannten sarkominduzierenden Wirkung dieses radioaktiven Röntgenkontrastmittels möglich.
    Notes: Summary A case of Mycosis fungoides (M. F.) is reported in a patient who died in 1966 at the age of 53, the M. F. partially being changed into reticular cell sarcomatosis. In view of the unknown etiology of the M. F. the observation becomes interesting because of a causal relation considered to be likely between the appearance of the M. F. and prior application of Thorotrast (232Th). Thorotrast had been used in 1936 for angiography of the carotid artery. Skin lesions of the M. F. were first observed in 1948. The autopsy performed in 1966 revealed a reticular cell sarcomatosis established in skin tumors and lymph nodes besides typical lesions of the M. F. Thorotrast was found to te deposited chiefly in the liver and the spleen; the lymph nodes had been found to contain radioactive material several years ago. Although the M. F. did not develop precisely where Thorotrast was deposited, the view is presented that the radioactive contrast medium had induced the M. F. as well as the reticular cell sarcomatosis deriving from it, as the potency of Thorotrast for inducing sarcomas is known.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 152 (1993), S. 12-14 
    ISSN: 1432-1076
    Keywords: Precocious puberty ; Ovarian neoplasm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 4-year-old girl with a lipid cell tumour of the ovary showed isosexual precocious pseudopuberty. The endocrine activity of the tumour led to elevated plasma levels of dehydroepiandrosterone sulphate, oestradiol, testosterone and androstenedione. After tumour resection the clinical signs of abnormal hormonal stimulation disappeared within 10 months. The girl developed precocious puberty again 2 years later without any sign of relapse. Therapy with luteinizing hormone releasing hormone agonist was effective although premature activation of the hypothalamic-pituitary-gonadal axis could not clearly be demonstrated by hormonal investigations.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 320 (1968), S. 355-361 
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Wir können also auf Grund unserer Ergebnisse feststellen, daß als Ursache für das klinische Bild einer gutartigen Stenose der Papilla Vateri bei Zweiteingriffen ohne Steinbefund zu unterscheiden ist zwischen der entzündlichen Form (Papillitis stenosans) und der degenerativen (adenomyomatösen) Form, hinzu kommen sog. Mischformen und schließlich echte Neubildungen (Myom, Neurinom u. a.). Liegt der Zeitpunkt des Beginns erneuter klinischer Symptome unmittelbar nach dem Ersteingriff, so handelt es sich um eine übersehene Papillenstenose (mit oder ohne Steine im Choledochus), die im Rahmen der Cholecysto-Cholangiopathie im weiteren Sinne nicht erkannt und durch den alleinigen Eingriff an Gallenblase oder-gang nicht behandelt wurde. Meist sind dies die entzündlichen Formen. Treten die Symptome nach beschwerdefreiem Intervall von mehreren Jahren auf, so muß entweder eine sog. “primäre Papillitis” als “Zweiterkrankung” diskutiert werden, oder es handelt sich —wie fast immer—um eine Adenomyomatose des Sphincterorganes, die als eine isolierte selbständige Erkrankung der Papillaa Vateri angesehen werden muß. Gleiches gilt für die echten Neubildungen. Während eine entzündlich-sklerosierte Papille—einschließlich der Röhrenstenose—durch einfache Papillenspaltung dauerhaft beseitigt werden kann (die biliodigestive Anastomose lehnen wir als fehlerhaft ab), vorausgesetzt, daß durch eine langdauernde T-Drainage eine entzündliche Restenosierung verhindert wird (Cattell), ist es bei der adenomyomatösen Wucherung der Papille noch keinesfalls erwiesen, ob nach einer einfachen Papillotomie ein Rezidiv ausgeschlossen ist. Wir selbst verfügen noch nicht über Fälle von Zweiteingriffen an der Papilla Vateri nach Papillotomie wegen adenomyomatöser Formen der Papillenstenose.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1572-9559
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The reflectivities of seven films belonging to the Bi-Sr-Ca-Cu-O family, with Tc ranging from 60 to 95 K, and of a single crystal of insulating Bi-Sr-Y-Cu-O, have been measured at room temperature in the normal phase. The optical conductivity has been analyzed in terms of Drude (D), mid-infrared (MIR), and charge-transfer (CT) contributions. As Tc increases, the spectral weight within the charge-transfer gap (D+MIR) increases. Meanwhile, the peak frequency of the MIR band moves towards the far-infrared and the optical conductivity becomes more similar to that of a “normal” metal.
    Type of Medium: Electronic Resource
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