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  • 1
    Electronic Resource
    Electronic Resource
    Photoluminescence and Raman studies of porous silicon in polymethyl methacrylate (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 613-615 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the observation of strong luminescence from porous Si grains containing Si nanocrystallites embedded in polymethyl methacrylate disks. In concentrated samples, forward and backscattered photoluminescence spectra were just as strong as in porous Si on Si wafers. This new result indicates that porous Si grains could be embedded in nonconducting polymers and would retain all its inherent characteristics as in porous Si layers on Si wafers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111066
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Light-emitting porous silicon diode with an increased electroluminescence quantum efficiency (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 62 (1993), S. 2700-2702 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The fabrication technology and the properties of a light-emitting device including a porous pn junction are presented. We employ the selective formation of different kinds of porous silicon substructures caused by the doping level and the illumination during anodization. The device has a nanoporous light-emitting n layer between a mesoporous p+-doped capping layer and the macroporous n substrate. The pn junction formed in this way has strong rectifying characteristics. It shows bright red-orange light emission under forward bias. Compared to simple metal-porous silicon devices, the structure has an increased quantum efficiency (factor 10–100).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.109236
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Skeletal metastases from a pineoblastoma (1994)
    Springer
    European radiology 4 (1994), S. 584-586 
    Details
    ISSN: 1432-1084
    Keywords: Pineal body, neoplasms ; Bone neoplasms, secondary
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A case of histologically proven skeletal metastases from pineoblastoma is presented. The primary tumor was initial1y treated by surgery and radiotherapy. To the best of our knowledge this is the third reported case of skeletal metastases arising from such primary tumor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00226836
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  • 4
    Electronic Resource
    Electronic Resource
    Die palliative Therapie des HCC (2000)
    Springer
    Der Internist 41 (2000), S. 205-207 
    Details
    ISSN: 1432-1289
    Keywords: Schlüsselwörter HCC ; Perkutane Ethanolinjektion ; Kryotherapie ; Review
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zum Thema Die Prognose des häufig von einer Leberzirrhose begleiteten hepatozellulären Karzinoms (HCC) ist ungünstig. Da nur ein geringer Prozentsatz der Patienten durch Resektion oder Transplantation therapierbar ist, fällt in Ermangelung einer potenten Chemotherapie den lokal destruierenden Verfahren eine wichtige Rolle bei der Behandlung zu. Die perkutane Ethanolinjektion (PEI) erzeugt durch die intratumorale Injektion von Ethanol eine Gewebsnekrose. Das Verfahren der Kryotherapie führt durch Einfrieren und Auftauen zur Gewebsdestruktion. Bei entsprechender Selektion kann durch beide Verfahren eine komplette Tumordestruktion mit Langzeitüberleben erreicht werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001080050026
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  • 5
    Electronic Resource
    Electronic Resource
    Die palliative Therapie des HCC (2000)
    Springer
    Der Internist 41 (2000), S. 198-204 
    Details
    ISSN: 1432-1289
    Keywords: Schlüsselwörter HCC ; Chemoembolisation ; Radiofrequenzablation ; Laser
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zum Thema Die transarterielle Chemoembolisation (TACE) wie auch die Thermoablationen sind Methoden, die bei der palliativen Therapie des hepatozellulären Karzinoms (HCC) zum Einsatz kommen. Während die TACE auf einer Zellzerstörung durch die Kombination von Zytostatika und Gefäßokklusion basiert, wird mit der Thermoablation eine hitzeinduzierte Gewebenekrose bei Temperaturen um ca. 60°C erreicht. Der Artikel beschäftigt sich mit den technischen Aspekten und klinischen Indikationen der TACE, der Lasertherapie und der Radiofrequenz(RF)-Ablation. Insbesondere für die letzteren Methoden erscheint eine adäquate Bildgebung zur Steuerung und Überwachung der Therapie indiziert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001080050025
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  • 6
    Electronic Resource
    Electronic Resource
    Electronic structure of (LaSr)2CuO4 and (NdCe)2CuO4 (1991)
    Springer
    The European physical journal 85 (1991), S. 43-48 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The electronic structure of (LaSr)2CuO4 and (NdCe)2CuO4 are compared. It is concluded that in both materials after doping by holes and electrons respectively the Fermi energy is at the top of the valence band. This explains many symmetrical properties and in particular the photoemission experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01387786
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    The optical gap of NiO (1992)
    Springer
    The European physical journal 86 (1992), S. 207-215 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The nature of the optical absorption gap in NiO at 4.0 eV is investigated. It is found that this gap is due to a band to band transition, where an electron is taken out of the valence band and placed into the conduction band. The optical gap of 6.0 eV found in Ni∶MgO is of a nature, where an electron is taken out of the oxygen 2p band and placed into the first affinity level of the Ni2+ ion (3d 8L»3d 9L−1). The impurity band created in Ni1−x Li x O by the Li ions is found 2.3 eV below the bottom of the conduction band in agreement with model predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313827
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Acceptors in Li doped NiO (1992)
    Springer
    The European physical journal 88 (1992), S. 247-248 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The electronic structure of the Li doped large gap semiconductor (insulator) NiO is investigated by photoemission and inverse photoemission spectroscopy. Spectral weight is produced by the Li doping within the gap at 1.4 eV above the top of the valence band. It is interpreted as due to an acceptor level associated with a LiO complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01323579
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  • 9
    Electronic Resource
    Electronic Resource
    Core level exchange splittings in transition metal compounds (1992)
    Springer
    The European physical journal 89 (1992), S. 21-27 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The exchange splittings of the 3s core levels are analyzed for a number of manganese, iron and cobalt compounds. It is found that in MnF2, MnCl2, FeF3, FeF2, FeCl2 and CoF2 the lowest energy state after photoemission has the samed-electron count as the ground state. In CoCl2 the mixing of thed 7L and thed 8L−1 is very strong.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01320824
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  • 10
    Electronic Resource
    Electronic Resource
    Die Gewerbepathologie der Uhrenindustrie mit besonderer Berücksichtigung der schweizerischen Verhältnisse (1934)
    Springer
    International archives of occupational and environmental health 5 (1934), S. 592-614 
    Details
    ISSN: 1432-1246
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02122961
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