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  • Articles: DFG German National Licenses  (2)
  • 2000-2004  (2)
  • Fluoroquinolones  (1)
  • PACS. 78.67.Hc Quantum dots – 42.50.Dv Nonclassical field states; squeezed, antibunched, and sub-Poissonian states; operational definitions of the phase of the field; phase measurements – 73.21.-b Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems  (1)
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  • Articles: DFG German National Licenses  (2)
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  • 2000-2004  (2)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Studies on the binding mechanism of fluoroquinolones to melanin (2000)
    Springer
    Journal of infection and chemotherapy 6 (2000), S. 72-76 
    Details
    ISSN: 1437-7780
    Keywords: Key words Ocular melanin ; Melanin affinity ; Fluoroquinolones ; Metal ions ; Binding mechanism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In order to elucidate the binding mechanism of melanin and fluoroquinolones (ofloxacin, norfloxacin, ciprofloxacin, lomefloxacin, levofloxacin), we investigated the interaction of fluoroquinolones with compounds such as l-β-(3,4-dihydroxyphenyl) alanine (l-DOPA), l-tyrosine, 5-hydroxy-l-tryptophan, l-tryptophan, and l-phenylalanine, which possess the kind of functional groups that melanin does and are closely related to melanin. The recovery of drugs from the melanin-drug complexes by metal ions of Li, Na, Ka, Mg, Ca, Ba, Cu, Ni, and Fe was demonstrated. Smaller and highly charged cations were found to be more effective for this recovery, and magnesium ions were the most effective of all the ions investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00012154
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Triggered single photons and entangled photons from a quantum dot microcavity (2002)
    Springer
    The European physical journal 18 (2002), S. 179-190 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 78.67.Hc Quantum dots – 42.50.Dv Nonclassical field states; squeezed, antibunched, and sub-Poissonian states; operational definitions of the phase of the field; phase measurements – 73.21.-b Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Current quantum cryptography systems are limited by the attenuated coherent pulses they use as light sources: a security loophole is opened up by the possibility of multiple-photon pulses. By replacing the source with a single-photon emitter, transmission rates of secure information can be improved. We have investigated the use of single self-assembled InAs/GaAs quantum dots as such single-photon sources, and have seen a tenfold reduction in the multi-photon probability as compared to Poissonian pulses. An extension of our experiment should also allow for the generation of triggered, polarization-entangled photon pairs. The utility of these light sources is currently limited by the low efficiency with which photons are collected. However, by fabricating an optical microcavity containing a single quantum dot, the spontaneous emission rate into a single mode can be enhanced. Using this method, we have seen 78% coupling of single-dot radiation into a single cavity resonance. The enhanced spontaneous decay should also allow for higher photon pulse rates, up to about 3 GHz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjd/e20020022
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    Paper (German National Licenses)
    Fulltext
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