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  • Articles: DFG German National Licenses  (7)
  • 1995-1999
  • 1985-1989  (7)
  • 1987  (7)
Source
  • Articles: DFG German National Licenses  (7)
Material
Years
  • 1995-1999
  • 1985-1989  (7)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    GaAlAs gain-guided semiconductor lasers with a curved facet (1987)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 1667-1669 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: GaAlAs gain-guided semiconductor lasers having a curved facet are fabricated by employing reactive ion beam etching. The use of the curved facet permits stabilization of transverse mode in the direction parallel to the junction plane, reduction of astigmatism, and multilongitudinal mode oscillation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.98537
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Low-temperature nitridation of fluorinated silicon dioxide films in ammonia gas (1987)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 981-983 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A new technique of growing nitrided oxide at low temperatures has been developed. Fluorine-enhanced thermal oxidation of silicon in O2+NF3 at temperatures below 800 °C and subsequent annealing of the fluorinated oxide in pure ammonia gas at the same temperature result in the formation of nitrided oxide. The dielectric breakdown strength of the fluorinated oxide is improved by the nitridation. Also, the nitrided oxide acts as a protective layer against alkaline ion contamination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.98783
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Radiative leakage of space-charge waves by a modulated thin-sheet electron beam propagating parallel to a reflection grating (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 3543-3549 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A two-dimensional radiation by a modulated thin-sheet electron beam, which propagates parallel to a reflection grating composed of a slightly corrugated conducting surface, is investigated. The radiation can be interpreted as a radiative leakage of space-charge waves supported by the electron beam, when the effect of radiated fields back on the motion of electrons is taken into account. A self-consistent analysis of the leaky space-charge waves is presented using a perturbation approach based on the multiple-space scales. The coupled-wave equations governing the radiative leakage of space-charge waves are systematically derived. The analytical expressions for physical quantities characterizing the radiation are obtained in closed form. Numerical results of the leakage coefficient, the phase change due to the leakage, and the radiation efficiency are given for both of the fast and slow space-charge waves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339278
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    HLA-DR antigen expression on keratinocytes in highly inflamed parts of psoriatic lesions (1987)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 116 (1987), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We have investigated the immunoperoxidase staining pattern in the epidermis and dermal infiltrates of highly inflamed portions of psoriatic lesions, selecting for biopsy early pinpoint lesions or margins of active plaque lesions. We found positive intercellular staining for HLA-DR antigens in localized areas of the epidermis in about half of the patients tested. In contrast, OKT6 antigen was found only on the dendritic cells in the epidermis and dermis in all cases. These findings support the hypothesis that an active cellular immune reaction involving the epidermis, possibly associated with the expression of HLA-DR antigens on keratinocytes, occurs in the highly inflamed areas of psoriatic lesions, particularly in early pinpoint lesions or at the edges of spreading plaque lesions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.1987.tb05794.x
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Combined La–Ce and Sm–Nd isotope systematics in petrogenetic studies (1987)
    [s.l.] : Nature Publishing Group
    Nature 327 (1987), S. 113-117 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A theoretical model is presented for the coupled evolution of cerium and neodymium isotopes in terrestrial rocks. Data presented for samples ranging from mid-ocean-ridge basalts to continental metamorphic rocks show that, while mantle-derived rocks are dispersed on a Ce-Nd diagram, continental ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/327113a0
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Particle motion in single acinar cells observed by microscope laser light scattering spectroscopy (1987)
    Springer
    European biophysics journal 15 (1987), S. 65-69 
    Details
    ISSN: 1432-1017
    Keywords: laser light scattering ; microscopy ; acinar cells ; granule secretion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract We report here the direct observation of the motion of cytoplasmic subcellular organelles and macromolecules within single, metabolically active, pancreatic acinar cells using microscope laser-light scattering spectroscopy (MLLSS). The relative amount and the “effective diffusion coefficient” of the mobile particles shows a marked difference in magnitude between the apical and basal regions of the cell. Secretory stimulation evoked by the cholinergic agonist bethanechol induces changes in the relative motion in the cytoplasm of approximately one fifth of the acinar cells. This study demonstrates the feasibility and utility of a novel technique, MLLSS, for the analysis of intracellular events in regions as small as (2 μm)3 in single, granule secreting cells. It also shows MLLSS to be a powerful tool for the detection and measurement of altered motion in disrete subcellular regions of small mammalian cells after biochemical and pharmacological manipulations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00257499
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Morphology and functions of calyx fluid filaments in the reproductive tracts of endoparasitoid,Microplitis mediator [Hym.: Braconidae] (1987)
    Springer
    BioControl 32 (1987), S. 9-17 
    Details
    ISSN: 1573-8248
    Keywords: Microplitis mediator ; calyx fluid ; endoparasitoid ; common armyworm ; Pseudaletia separata ; Microplitis mediator ; filaments du calice ; endoparasitoide ; vers gris commun ; Pseudaletia separata
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé De très longs filaments semblables à des virus ont été trouvés dans le calice des organes reproducteurs femelles du braconide parasitoïde,Microplitis mediator Haliday, qui attaque les larves de la NoctuellePseudaletia (=Leucania) separata Walker. Ces filaments ont leur origine dans le noyau de la cellule. L'examen cytochimique (Feulgen et vert de méthyl) atteste la présence d'ADN dans les filaments. Les filaments adhèrent à la surface du chorion des œufs jusqu'à l'éclosion et ont pour fonction de supprimer la réaction d'encapsulation de l'hôte. D'autre part, on observait que les tératocytes, 18 h et 24 h après la ponte secrétaient des substances inhibitrices de l'encapsulation.
    Notes: Abstract Very long virus-like filaments were found in calyx region of the reproductive tracts of the braconid parasitoid,Microplitis mediator Haliday, which attacks the Noctuid,Pseudaletia (=Leucania) separata Walker. These filaments are nuclear in origin; Feulgen and methyl-green pyronin reactions revealed cytochemically the presence of DNA. Filaments are attached to the surface of the chorion of an egg until hatching and function to suppress the encapsulation reaction of the host. Furthermore, it was observed that serosal cells, 18-h and 24-h from oviposition, released substances possibly related to the inhibition of encapsulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02390926
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    Paper (German National Licenses)
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