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  • 1
    Electronic Resource
    Electronic Resource
    A unique two-electron, reversible reduction of a binuclear copper(II) complex. Observation of the electrochemical behavior predicted by Polcyn and Shain for the sequential transfer of two electrons at the same potential (1978)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 100 (1978), S. 1931-1932 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00474a052
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Photovoltaic hybrid device with broad tunable spectral response achieved by organic/inorganic thin-film heteropairing (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 81 (2002), S. 556-558 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By means of laser deposition, spin casting and vacuum evaporation, optoelectronic hybrid devices were manufactured based upon the thin-film heteropairing of a perylene-derived molecule [di-isoquinoline perylene derivative (DQP)] and CdS. The photovoltaic characteristics of the devices are presented and discussed. We demonstrate that by exploitation of relatively high carrier mobilities in the CdS layer and the high photonic yield and deposition ease of the DQP film, efficient and technologically appealing optoelectronic devices are feasible. In addition, bias dependence of the spectral sensitivity demonstrates the versatility of the introduced device concept in light of photonic sensor applications. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1494117
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  • 3
    Electronic Resource
    Electronic Resource
    Two-photon-excited green emission and its dichroic shift of oriented thin-film CdS on glass formed by laser deposition (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 356-358 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The photoluminescence of oriented thin-film CdS on glass formed by laser deposition was investigated employing 200 fs, 1.54 eV laser pulses at room temperature. The ultrafast excitation caused a two-photon absorption process, which results in purely green emission at the band gap. The spectra are fitted very well by the application of the van Roosbroeck–Shockley relation, density of states, and Urbach's rule demonstrating the intrinsic character of the radiative recombination. It is further shown that the energy position of the emission peak depends on the polarization of the impinging laser beam due to the dichroism of the highly oriented films. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1432756
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  • 4
    Electronic Resource
    Electronic Resource
    Intrachain exciton quenching analysis in conjugated polymers by two-photon spectroscopy (2002)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 116 (2002), S. 3449-3454 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Intrachain exciton quenching in ladder-type polyparaphenylene has been quantified for the first time. Two-phonon absorption and subsequent upconverted photoluminescence of ladder-type polyparaphenylene and polyfluorene has been measured and analyzed with a new theoretical framework for the two-photon absorption saturation. This microscopic analysis determines the number of singlet excitons as a function of the excitation intensity, which is compared to the photoluminescence intensity. The absorption saturation alone perfectly describes the photoluminescence saturation in polyfluorene, whereas in ladder-type polyparaphenylene, exciton–exciton quenching occurs. By measuring in solution, the formation of stacked polymer chains is prevented. Therefore, the quenching is due to intrachain interaction. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1445108
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  • 5
    Electronic Resource
    Electronic Resource
    Der Morbus Tangier und seine Diagnose durch den HNO-Arzt (1975)
    Springer
    European archives of oto-rhino-laryngology and head & neck 210 (1975), S. 300-301 
    Details
    ISSN: 1434-4726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A case report of Tangier disease (Anlipoproteinemia). The symptom is the orange yellow discolouration of hyperplastic tonsills. Further typical but not always present findings are orange yellow changes of the oropharynx and nasopharynx and enlargement of lymph nodes. The clinical, histological and electron-microscop ical findings are described. Being acquainted withe the disease the ENT specialist can establish an early diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00460042
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  • 6
    Electronic Resource
    Electronic Resource
    Klinische und morphologische Befunde beim Morbus Tangier (Hypo-α-Lipoproteinämie) und seine Bedeutung für die Oto-Rhino-Laryngologie (1977)
    Springer
    European archives of oto-rhino-laryngology and head & neck 217 (1977), S. 475-485 
    Details
    ISSN: 1434-4726
    Keywords: Tangier disease ; Disorder of fat metabolism ; Yellow-orange enlargement of tonsills and adenoids ; Cholesteryl-ester storage in histiocytes ; Morbus Tangier ; Fettstoffwechselstörung ; Orange-gelbliche Verfärbung der Tonsillen ; Cholesterinesterspeicherung in Histiocyten
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über die ersten in Deutschland entdeckten Patienten mit einer Hypo-α-Lipoproteinämie — Tangier disease — berichtet. Diese Fettstoffwechselstörung zeichnet sich durch eine Verminderung der HDL-Lipoproteine im Serum sowie durch Cholesterinspeicherung in Histiocyten aus. Hervorstechendes Merkmal ist eine orange-gelbliche Verfärbung des lymphatischen Rachenringes; die weiteren Symptome können vielgestaltig sein, der Verlauf der Erkrankung ist wenig typisch. Als Ausdruck der wahrscheinlich autosomal rezessiv vererbten Fettstoffwechselstörung werden hauptsächlich Cholesterinester im Reticuloendothelialen System (z. T. in kristalliner Form mit Doppelbrechung) gespeichert, in geringerem Maße auch in glatten Muskelzellen, Pericyten und Schwannschen Zellen. Der Morbus Tangier kann durch laborchemische und ultrastrukturelle Kriterien von anderen Fettstoffwechselstörungen abgegrenzt werden. Eine causale Therapie ist nicht bekannt, der HNO-Arzt kann die sicher häufiger vorkommende Krankheit frühzeitig erkennen.
    Notes: Summary The report deals with the first three cases of Tangier disease (Hypo-α-Lipoproteinaemia) observed in Germany. This rare metabolic disorder is distinguished by a diminution of HDL-Lipoproteins in serum and a lipid storage in histiocytes. The prominent symptom is the orange yellow discolouration of hyperplastic tonsills and adenoids; further symptoms of the disease generally are various, the development is little typical. The morphological substrat of the deranged fat metabolism is cholesteryl ester storage in the reticuloendothelial system, smooth muscle cells, pericytes and Schwann cells of peripheral nerves. M. Tangier can be differentiated from other lysosomal defects by ultrastructural and chemical parameters, it seems to have a autosomal recessiv inheritance. It is the ENT-specialist, who can establish an early diagnosis of this disease, provided he is aware of its clinical features.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00464469
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  • 7
    Electronic Resource
    Electronic Resource
    Langzeitbeobachtungen chronischseröser Otitis media nach experimentellem Tubenverschluß bei Katzen (1977)
    Springer
    European archives of oto-rhino-laryngology and head & neck 216 (1977), S. 623-624 
    Details
    ISSN: 1434-4726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In order to induce a serous otitis media in cats, the pharyngeal opening of the Eustachian tube was cauterized and obstructed on one side only through transpalatal approach; the other side remaind intact and served as control. On tympanic membrane examination and puncture 11 months later, there was fluid in the middle ear in three ears, no fluid in two ears, a tympanic membrane perforation in one ear and a red tympanic membrane in one ear. The middle ear was then ventilated through a plastic tube in two ears with and without fluid respectively. In all other ears, no tube was inserted. After another 7 months, the animals were intravitally perfused, and the middle ear mucosa biopsyed. The histological results of the light and electron microscopy showed chronic changes of the middle ear mucosa following experimental tubal obstruction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00459022
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  • 8
    Electronic Resource
    Electronic Resource
    Lymphocytic adenohypophysitis mimicking a pituitary macroadenoma (2000)
    Springer
    Neurosurgical review 23 (2000), S. 112-116 
    Details
    ISSN: 1437-2320
    Keywords: Key words Lymphocytic adenohypophysitis ; Pituitary adenoma ; Pituitary surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  A 24-year-old woman developed headache and rapidly progressive visual disturbances during the last trimester of her first pregnancy. Magnetic resonance tomography (MRI) of the brain documented an intra- and suprasellar mass lesion. For preservation of vision, transsphenoidal microsurgical decompression was performed. Immediately postoperatively, visual acuity improved and hemianopia resolved. Histological examination yielded the diagnosis of primary lymphocytic adenohypophysitis. This is a rare inflammatory pituitary disease. There are no typical clinical, laboratory, or radiological findings that allow precise preoperative diagnosis. Even though this autoimmune disorder is principally steroid-responsive, an improvement of visual disturbances under steroid therapy cannot be predicted. Therefore, surgery is justified not only to establish the diagnosis, but also to restore vision by decompression of the optic nerves and the chiasm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101430050011
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  • 9
    Electronic Resource
    Electronic Resource
    Supratentorial recurrences of gliomas. Morphological studies in relation to time intervals with astrocytomas (1977)
    Springer
    Acta neurochirurgica 37 (1977), S. 75-91 
    Details
    ISSN: 0942-0940
    Keywords: Supratentorial astrocytomas ; Recurrences of astrocytomas ; Classification of gliomas ; Recurrence intervals ; Radiotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We report 137 recurrent supratentorial astrocytomas. The primary tumours diagnosed on the basis of a grading system with three stages were 72 astrocytomas I and 65 astrocytomas II. In the first group 14% of the recurrences were not changed, 55.5% became astrocytomas II, and 30.5% became glioblastomas. In the second group 55.4% were unchanged, and 44.6% became glioblastomas. The postoperative intervals until reintervention or death were statistically examined. It seems that the recurrence time chiefly depends on the nature of the primary tumour. The transformation of an astrocytoma I to a glioblastoma takes longer than the transformation of an astrocytoma II into a glioblastoma. In about two thirds of all astrocytomas an increase of malignancy is to be expected. From the histological picture it is not possible in an individual case to predict the likelihood or speed of malignant change. With regard to the effect of irradiation the authors conclude that radiotherapy most probably does not produce malignancy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01401927
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  • 10
    Electronic Resource
    Electronic Resource
    Schalenelemente in gemischer Darstellung: Theorie — Kritik — Beispiele (1978)
    Springer
    Archive of applied mechanics 47 (1978), S. 207-222 
    Details
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary To analyse thin shell structures curved mixed elements are developed and studied from a theorctical vantage point and through the medium of numerical exampels. The investigations show, that the accuracy of mixed shell elements is dependent first of all on the choice of integration variables, while the influence of the order of polynoms is less.
    Notes: Übersicht Zur Berechnung dünnwandiger Schalen wird ein Satz von gekrümmten Elementen mit Ansatzfreiwerten in gemischter Weg- und Kraftgrößendarstellung entwickelt und deren Brauchbarkeit an Hand einiger Beispiele überprüft. Die theoretischen und numerischen Untersuchungen zeigen, daß die Genauigkeit gemischter Elemente in erster Linie von der Auswahl geeigneter Integrationsvariabler abhängt, während die Ordnung der Polynomansätze die Approximationsgüte nur geringfügig beeinflußt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00536408
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