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  • 2000-2004  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Quantum-dot phonons in self-assembled InAs/GaAs quantum dots: Dependence on the coverage thickness (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 77 (2000), S. 3556-3558 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We study the phonons of self-assembled InAs/GaAs quantum dots for different coverage thicknesses L. The additional Raman feature detected between the GaAs transverse optical and the InAs longitudinal optical modes, which we assign to phonons of the dots, exhibits an upward frequency shift with L. This shift is attributed to compressive strain in the dots and, on the basis of its dependence on L, we show that these phonons arise from the quantum dots and not from the wetting layer. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1329157
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Oral histoplasmosis associated with HIV infection: a comparative study (2004)
    Oxford, UK : Munksgaard International Publishers
    Journal of oral pathology & medicine 33 (2004), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective:  Histoplasmosis is a granulomatous fungal disease caused by Histoplasma capsulatum. The objective of the present paper was to describe the prevalence of oral histoplasmosis (OH) in two services from an endemic area in Argentina between 1991 and 2002 and to compare the clinicopathological profile of OH between HIV-positive and HIV-negative patients.Methods:  About 733 HIV+ (group A) and 14 260 patients (group B) were examined. Clinical diagnosis was confirmed by cytology, biopsy or culture.Results:  About 21 (3%) and 10 (0.07%) cases of OH were diagnosed in group A and B respectively. Most patients were male. A total of 90% of patients in group A were 〈45 years old whereas 70% of group B were more than 45 years old. Palate, gingiva and oropharynx were the most frequent locations. The importance of including histoplasmosis in the differential diagnosis of ulcerated oral lesions in immunocompromised patients was discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.2004.00200.x-i1
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  • 3
    Electronic Resource
    Electronic Resource
    Immunoblot analysis of IgA antibodies to Naegleria fowleri in human saliva and serum (2000)
    Springer
    Parasitology research 86 (2000), S. 775-780 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The objective of this study was to evaluate the secretory IgA (SIgA) antibody response to Naegleria fowleri (Nf) in individuals living in a parasite endemic area. Saliva and serum samples were obtained from both healthy subjects and patients suffering from a respiratory illness (chronic bronchitis or rhinitis) and were analyzed by immunoblot assay. SIgA from the patients' samples recognized more intensely a greater number of Nf proteins than did SIgA from the healthy control group. The proteins more frequently recognized were those with a molecular weight of 171, 107, 102, 62, 50, 46, and 10 kDa. Some IgA antibodies recognized proteins from Nf and Entamoeba histolytica (Eh) of similar molecular weight. These results suggest that some of those antibodies could have been elicited by a previous intestinal infection with Eh. Through the common mucosal immune system the IgA B-cells activated by Eh antigens can be disseminated to all the mucosae, including the nasal mucosa. SIgA antibodies recognizing Nf proteins, induced either by specific immunization or by cross-reaction, could participate in the resistance to the infection, probably by inhibiting the adherence of Nf trophozoites to the nasal mucosa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004360000243
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    Paper (German National Licenses)
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