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  • Articles: DFG German National Licenses  (26)
  • 1990-1994  (18)
  • 1970-1974  (8)
  • 1
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    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 75 (1994), S. 7774-7778 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Si, Ge, and Be implantations were performed into (x11)A-oriented semi-insulating InP and GaAs substrates for x≤4. For comparison some of the implantations were also performed into (110)- and (100)-oriented substrates. For 200 keV/5×1013 cm−2 Si and 200 keV/3×1013 cm−2 Ge implants after 850 °C/7 s annealing, the InP is always n type with similar sheet resistance independent of the substrate orientation. No in-diffusion of Si or Ge was observed after annealing for any substrate orientation. Similar behavior was observed for Si implants in GaAs and for Si/B co-implants in both InP and GaAs. Photoluminescence measurements were performed on the Si- and Si/B-implanted InP and GaAs. For 30 keV/1.5×1014 cm−2 Be implants in both InP and GaAs, the in-diffusion of Be in (311)A-oriented substrates is less compared to the (100) material.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 502-504 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of post-implantation annealing have been studied in MeV Er-implanted GaAs by monitoring the Er3+ electron paramagnetic resonance (EPR) signal as well as the Er3+ and near-band-edge photoluminescence (PL) spectra as a function of the anneal temperature. Er3+ PL is observed from several distinct Er sites in the annealed material. In addition, the observed dependences upon anneal temperature suggest that the Er3+ PL is emitted from centers that are not in the Er3+ state at equilibrium. Absolute EPR measurements of the Er3+ concentration indicate that only a small fraction (〈0.1%) of the Er in the sample is Er3+.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 2692-2699 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electrical and optical properties of n-type and p-type epitaxial GaAs layers have been studied after MeV implantation of heavy (Xe and Er) ions. All implanted layers were highly resistive immediately after implantation. Annealing to only moderate temperature (725 °C) recovered the as-grown electrical properties of beryllium-doped p-type layers. However, after annealing silicon-doped n-type layers, we observe a dramatic change from the as-grown carrier profiles. After anneal, the silicon-doped, n-type layers became conductive but the carrier profiles were markedly different from the as-grown material. A significant thickness of the implanted portion of the epitaxial layers shows distinct p-type conductivity after annealing. We have correlated this p-type activity with a transfer of silicon from the gallium sublattice (SiGa) to the arsenic sublattice (SiAs). The site transfer is viewed to result from the altered thermodynamics governing site occupancy during annealing of Si in GaAs under the unique damage conditions produced by heavy ion MeV implantation. Additionally, the observed thermal stability of the site transfer process above 875 °C may have implications for implantation isolation techniques.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 2136-2138 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Steady state and time resolved photoluminescence studies of type IIb boron-doped synthetic diamond reveal a new broad red emission band that exhibits many of the features of classic donor–acceptor pair recombination. This recombination is thought to be between an as-yet unidentified neutral donor, possibly nitrogen related, approximately 3.6 eV below the conduction band edge and neutral boron acceptors at 0.37 eV above the valence band edge.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 6 (1992), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Helicobacter pylori infection has proven to be extraordinarily difficult to eradicate. Antimicrobial monotherapies have been particularly disappointing, with most eradication rates in the range of 0 to 15%. We evaluated cefprozil (250 mg q.d.s. for 14 days) in 12 H. pylori-infected subjects. The 13C-urea breath test was used to evaluate effectiveness of therapy. Eradication was defined as a negative urea breath test 4 to 6 weeks after the end of treatment. Suppression of H. pylori was demonstrated in 4 of 12 (33%) by a negative urea breath test two days after start of treatment. H. pylori infection was not eradicated in any subject (0%). Adverse events were intermittent and mild. Cefprozil does not appear to offer promise as monotherapy for the eradication of H. pylori.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Triple therapies using bismuth, metronidazole and tetracycline or amoxicillin were the first truly successful anti-H. pylori therapies. Metronidazole resistance has become an increasing problem that has severely limited the usefulness of the original triple therapy. Resistance to tetracycline or amoxicillin has not been reported and both are effective against H. pylori. We therefore tested a new triple therapy consisting of 500 mg tetracycline, 500 mg amoxicillin, and 2 tablets of bismuth subsalicylate each administered four times daily (with meals and at bedtime) for 14 days during treatment with ranitidine 300 mg daily. H. pylori eradication was defined as no evidence of H. pylori one or more months after stopping therapy. H. pylori status was evaluated by a combination of urea breath test and histology. Sixteen patients with H. pylori infection and active peptic ulcers were enrolled. The new triple therapy was successful in only 7 individuals (43%). Metronidazole appears to be critical for the effectiveness of the original triple therapy. An alternative to metronidazole will be required for a new successful triple therapy.
    Type of Medium: Electronic Resource
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  • 8
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    London : Periodicals Archive Online (PAO)
    Journal of the Economic and Social History of the Orient. 34 (1991) 365 
    ISSN: 0022-4995
    Topics: Ethnic Sciences , History , Sociology , Economics
    Description / Table of Contents: INDIAN SUBCONTINENT
    Notes: SUBJECTS
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 79 (1973), S. 11-18 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird über zwei Fälle — eine 70 Jahre alt gewordene Frau und einen 66 Jahre alt gewordenen Mann — berichtet, bei denen post mortem ein interatrial gelegenes Lipom gefunden wurde, das von anderen Autoren auch als eine knotenförmige lipomatöse Hypertrophie im Vorhofseptum bezeichnet wird. In dem einen Fall bestand eine paroxysmale Tachyarhythmie mit Vorhofflimmern, die durch diese Fettgewebsgeschwulst erklärt werden könnte. Das Lipom bzw. die lipomatöse Hypertrophie im Vorhofseptum wurde mit einem Durchschnittsalter von 72 Jahren fast ausschließlich bei alten Menschen gefunden. Demgegenüber beträgt das Durchschnittsalter der Patienten bei den übrigen Fällen mit einem Lipom des Herzens 44 Jahre. Es sollte deshalb bei älteren Menschen mit einer Störung der Erregungsbildung im Vorhof differentialdiagnostisch auch an ein Lipom bzw. eine lipomatöse Hypertrophie im Vorhofseptum gedacht werden.
    Notes: Summary In a 70 years old woman suffering from paroxysmal tachyarhythmia and atrial fibrillation and in a 66 year old man, interatrial lipomas are discovered by post mortem examination. This lesion, named lipomatous hypertrophy of the interatrial septum by other authors, obviously is correlated with cardiac dysrhythmia. As seen from literature, interatrial lipomas are to be found in elderly patients with an average age of 72 years, whilst cardiac lipomas of other localizations are occurring in a medium age of 44 years. Therefore, interatrial lipomas should be taken in consideration in cases of cryptogenetic cardiac dysrhythmia.
    Type of Medium: Electronic Resource
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  • 10
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    Madrid : Periodicals Archive Online (PAO)
    Archivo español de arqueología. 45/47:125/130 (1972/1974) 267 
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