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  • 1
    Electronic Resource
    Electronic Resource
    The role of the substrate in photoenhanced metalorganic chemical vapor deposition (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 296-298 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A GaAs laser diode has been used as the light source for the selective epitaxial growth of GaAs by photoenhanced metalorganic chemical vapor deposition (PE-MOCVD). The use of GaAs/InGaP layered structures as substrates for these experiments permitted to accurately control the availability of photoexcited carriers reaching the GaAs growth surface. The experimental results obtained rule out pure pyrolysis and photolysis as possible mechanisms responsible for the PE growth rate, and indicate that photoexcited carriers are directly involved in the PE process. The experimental data are consistent with a kinetic model that invokes surface recombination as the main physical mechanism for the PE growth rate effect. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.113523
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  • 2
    Electronic Resource
    Electronic Resource
    High temperature adduct formation of trimethylgallium and ammonia (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 55-57 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High temperature gas phase reactions between trimethylgallium (TMG) and ammonia were studied by means of in situ mass spectroscopy in an isothermal flow tube reactor. The temperature, pressure, and reaction time were chosen to emulate the gas phase environment typical of the metal–organic vapor phase epitaxy (MOVPE) of GaN. The main gas phase species is [(CH 3)2Ga:NH2]x, where most probably x=3, resulting from the very fast adduct formation followed by elimination of methane. The further gas phase decomposition of this species proceeds through the stepwise elimination of methane. These studies indicate that little TMG exists within the growth ambient under most MOVPE growth conditions. The further gas phase reaction of [(CH3)2Ga:NH 2]x may be responsible for the strong dependence of the MOVPE GaN growth rate and uniformity commonly observed. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.118117
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  • 3
    Electronic Resource
    Electronic Resource
    Time-resolved two-photon photoemission spectroscopy of HOPG and Ag nanoparticles on HOPG (1999)
    Springer
    Applied physics 68 (1999), S. 439-445 
    Details
    ISSN: 1432-0649
    Keywords: PACS: 78.47.+p; 79.60.Jv; 79.60.-i; 82.65.Jv
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400050646
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  • 4
    Electronic Resource
    Electronic Resource
    Pädiatrische Rheumaambulanz als interdisziplinäre Aufgabe (1996)
    Springer
    Monatsschrift Kinderheilkunde 144 (1996), S. 872-877 
    Details
    ISSN: 1433-0474
    Keywords: Schlüsselwörter JCA ; Interdisziplinäre Versorgung ; Chronische Krankheit ; Psychologie ; Key words JRA ; Patient care team ; Chronic disease ; Juvenile rheumatoid arthritis psychology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Chronic diseases in general and juvenile chronic arthritis in particular are often considered as diseases which should best be treated in an interdisciplinary manner. However, the evereyday practice of a multidisciplinary team approach often remains unclear. The article outlines the different tasks and the ways of cooperation of the team in Hannover, Germany. Special emphasis is laid on the psychologist's and the social worker's part. The modern idea of a multidisciplinary team approach should be more than mere words.
    Notes: Zusammenfassung Wie auch bei anderen chronischen Erkrankungen werden bei der juvenilen chronischen Arthritis die Teamarbeit und eine interdisziplinäre Versorgung für notwendig erachtet. Oft bleibt jedoch unklar, was dies in der Praxis im einzelnen bedeutet. Der Beitrag bemüht sich hier um eine Klärung, insbesondere bezüglich der Integration psychosozialer Mitarbeiter. Es soll gezeigt werden, inwiefern Teamarbeit mehr ist als eine moderne Floskel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001120050052
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  • 5
    Electronic Resource
    Electronic Resource
    Diagnosis of paediatric Lyme arthritis using a clinical score (1998)
    Springer
    European journal of pediatrics 157 (1998), S. 304-308 
    Details
    ISSN: 1432-1076
    Keywords: Key words Lyme arthritis ; Diagnosis ; Clinical score
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Diagnosis of Lyme arthritis (LA) in children and adolescents may be difficult due to non-specific clinical manifestations and unreliable serological tests for antibodies to Borrelia burgdorferi. In a national prospective study, 186 children with arthritis were examined in whom the attending physicians had considered the diagnosis of LA. Ultimately, LA was confirmed in 87 patients and these were compared with the remaining 99 children in whom arthritis was attributable to other causes. In comparison to patients with other causes of arthritis, patients with LA had a higher frequency of episodic arthritis and initial knee joint arthritis, reported tick bites more frequently, were older, had a lower frequency of initial arthralgias, and there were fewer large joints involved. A score was developed in a group of these patients and tested in a second group. It enabled patients with LA to be distinguished from those with other causes of arthritis: within a range from 12 to −7 points, a score of 2.5 or less excluded LA whereas 6 or more points were highly indicative of LA. If only those children with a score result between 2.5 and 6 had been tested for antibodies to B. burgdorferi, the number of tests would have been reduced by 63%. Conclusion Careful analysis of clinical presentation and use of a clinical score may help in distinguishing LA from other causes of arthritis and thus reduce unnecessary and expensive testing and uninterpretable test results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004310050816
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