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  • Articles: DFG German National Licenses  (8)
  • 1985-1989  (8)
  • 1987  (4)
  • 1985  (4)
Source
  • Articles: DFG German National Licenses  (8)
Material
Years
  • 1985-1989  (8)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    New hydride vapor phase epitaxy for GaP growth on Si (1987)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 1245-1247 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Gallium phosphide films are successfully grown on (100) Si substrates by a new hydride vapor phase epitaxy. Mixing of reactant vapors just above the substrate makes the growth rate as high as 50 nm/min even in the temperature range of 350–450 °C. This makes the two-step growth procedure applicable for growing a single domain GaP film on Si from H2-HCl-PH3-Ga reactants. An etch pit density of 7.5×106 cm−2 and a full width at half-maximum of 93 arcsec in a double-crystal x-ray rocking curve are achieved. Green light-emitting diodes with 565 nm peak wavelength are successfully fabricated using nitrogen-doped GaP films grown on Si.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.98693
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Calcifying epithelioma of Malherbe with ossification. Special reference to lectin binding and immunohistochemistry of ossified sites (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cutaneous pathology 14 (1987), S. 0 
    Details
    ISSN: 1600-0560
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Lectin binding sites and immunohistochemically detectable fibronectin and carbonic anhydrase II (CA II) were examined in induced bone structure of calcifying epithelioma of Malherbe. Pathological features of ossification were particularly evident in the border zone between tumor epithelium and stroma, and epithelial foci adjacent to sites of bone formation were conspicuously basophilic. The use of lectin binding in these foci coincided with the basophilic epithelial zones: Con A, RCA-1, PNA, SBA, and WGA bound strongly, indicating thepresence of glucose (Glu), mannose (Man), galactose (Gal), N-acetyl-D-galactosamine (GalNAC), and N-acetyl-D-glucosamine (GlcNAC). Fibronectin was also detected in the same epithclial-mesenchymal interacting layers as the positive lectin-binding sites. Staining for CA II was strongly positive in giant cells and in epithelial zones in the bone-inducting areas. The bond induction mechanism in the stromal tissue of calicifying epithelioma of Malherbe may initially involve the action CA II in the epithelial-mesenchymal interacting zone, which then brings about ossification of the matrix which is fibronectin-positive and rich in lectin-binding sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0560.1987.tb00494.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Electrochromic properties of alkylviologen-cyclodextrin systems (1987)
    Springer
    Journal of applied electrochemistry 17 (1987), S. 567-573 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electrochromic properties of methyl, ethyl, n-hexyl and n-heptyl viologens, and α-, β-, γ-cyclodextrin systems were studied using cyclic voltammetry and absorption spectroscopy. Colourations of red-violet (λ max = 530 or 560 nm), blue (λ max = 600nm) and light purple (λ max = 560 and 600 nm) could be obtained by changing the length of the alkyl chain of viologens or the radius of cyclodextrin. The intermolecular interaction between viologen radicals is weakened when the radicals form inclusion complexes so the blue colour inherent in the monomer of viologen radical appears. The red-violet colour is ascribed to the dimer of the reduced viologen. With the addition of γ-cyclodextrin, viologens were found to be included as dimer. The light purple colour is ascribed to the mixed colour of the monomer and the dimer. Furthermore, since the ratio of monomer and dimer depends upon the concentration of cyclodextrin, any colour between the red-violet of the dimer and the blue of the monomer can be obtained by adjusting the concentration of cyclodextrin. The redox reaction of an inclusion complex was found to depend upon the length of the alkyl viologen and the size of the cavity in cyclodextrin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01084131
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Analysis of fifty cases of facial palsy due to otitis media (1985)
    Springer
    European archives of oto-rhino-laryngology and head & neck 241 (1985), S. 163-168 
    Details
    ISSN: 1434-4726
    Keywords: Facial palsy ; Otitis media
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Fifty cases of facial palsy (FP) due to otitis media treated in our hospital during the 10-year period from 1972 to 1981 were analyzed. The averaged percentage of this incidence was 3.1% of all the FP occurring. FP due to otitis media acuta (OMA) was frequently seen in infants. FP due to otitis media chronica (OMC) tended to occur in combination with cholesteatoma or acute exacerbations of infection. Paralyses were generally mild and bacteria from the otorrhea were similar to those of OMC without FP. When present, sites of dehiscence of the facial canal were most frequently seen in its horizontal portion. Electromyographically, the posterior (mastoid) side of the horizontal portion of the facial nerve bundle seemed to be related to the branch to the orbicularis oculi muscle, while the anterior (stapes) side was directed to the orbicularis oris muscle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00454350
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Accumulation of amyloid in pituitary adenomas (1985)
    Springer
    Acta neuropathologica 68 (1985), S. 87-92 
    Details
    ISSN: 1432-0533
    Keywords: Pituitary neoplasm ; Anterior pituitary hormone ; Amyloid ; Electron microscopy ; Bromocriptine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The accumulation of amyloid in pituitary adenomas was examined in relation to the types of adenoma and the effect of bromocriptine treatment. Amyloid had accumulated in 34 of 48 adenomas (71%). The occurrence in prolactin-secreting adenomas and growth hormone-secreting adenomas was 79%, respectively, while that in non-functioning adenomas was 50%. Treatment with bromocriptine enhanced the occurrence and extent of the amyloid accumulation in prolactin- or growth hormone-secreting adenomas. Electron microscopy revealed the initial appearance of the amyloid fibrils in the smooth endoplasmic reticulum and a possible sequential process of their release from the cells. The presence of secretory granules in vesicles containing amyloid fibrils and their simultaneous release with amyloid fibrils suggested that degradation of secretory granules was involved in the formation of amyloid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688628
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Lectin-binding patterns in the developing tooth (1985)
    Springer
    Histochemistry and cell biology 83 (1985), S. 455-463 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The lectin-binding patterns of the cells involved in amelogenesis and dentinogenesis in developing teeth of rats, were studied. Undifferentiated odontogenic epithelia exhibited very slight staining with almost all of the lectins examined. The lectin-staining affinities of secretory ameloblasts could be divided into two categories: Concanavalin-A (Con-A), Wheat germ agglutinin (WGA) and Soybean agglutinin (SBA) binding occurred from the middle to apical cytoplasm, whereas Ricinus communis agglutinin-I (RCA-I) and Ulex europeus I (UEA-I) binding predominated in the basal regions. The cells of the stratum intermedium exhibited relatively stranges lectin staining, which appeared to be dependent on ameloblastic maturation. The basement membranes in undifferentiated epithelia were markedly positive for lectin binding. Odontoblasts showed moderate Con-A staining on the apical side of the cells, as well as slight-to-moderate reactions with WGA and SBA. Pulp cells and dental papillae showed slight-to-moderate lectin staining, and predentin and dentin were also moderately positive for Con-A and RCA-I binding and slightly so for WGA and SBA. The lectin-binding affinities were enhanced during the formation of enamel and dentin, and appeared to be dependent on the degree of cellular differentiation in ameloblasts and odontoblasts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00509209
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Vascular compromise in chronic volvulus with midgut malrotation (1987)
    Springer
    Pediatric radiology 17 (1987), S. 277-281 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Three cases of chronic volvulus of the small bowel in midgut malrotation are presented, all of whom manifested similar angiographic findings: proximal occlusion of the superior mesenteric artery and vein and development of collateral vessels. These findings may indicate the pathophysiology of chronic volvulus in midgut malrotation; the volvulus is progressive and eventually results in the twisting of the mesenteric root itself, but because of its chronic nature collateral circulation develops, eliminating bowel necrosis. Computed tomography (CT), performed in two cases, revealed dilated, tortuous vessels in the mesentery in addition to the known CT finding of a whirl-like pattern of the volvulated small bowel loops. Sonography, performed in one case, showed an unique feature of whirling sonolucent layers probably representing the volvulated small bowel loops intermixed with dilated mesenteric collateral vessels. We would like to emphasize the usefulness of CT and sonography in the early diagnosis of those cases with vague and nonspecific clinical manifestations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02388238
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    A new dense Kondo system: Ce y La1−y Ge2. Resistivity, specific heat, and susceptibility studies (1985)
    Springer
    Journal of low temperature physics 58 (1985), S. 513-531 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Resistivity, specific heat, and susceptibility studies on CeGe2 and its pseudobinary system Ce y La1−y Ge2 are reported. The effective moment and the occurrence of ferromagnetic order (0.4≤y≤1.0) indicate the trivalence of Ce in the entirey range. However, the present results suggest that a Kondo effect coexists with the interionic ferromagnetic interaction; the magnetic entropy at the ordering temperatureT c is significantly lower thanR ln 2 (R is the gas constant) and the resistivity of La-diluted samples (y≤0.6) exhibits a Kondo-like minimum at about 10 K. The magnetic entropy atT c is related to the ratioT K/T c by a simple thermodynamic argument, whereT K is the Kondo temperature. TheT K is estimated to be about 2.7 K for 0.4≤y≤1.0, in fair agreement with what the resistivity anomaly suggests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00681141
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    Paper (German National Licenses)
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