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  • Articles: DFG German National Licenses  (22)
  • 1
    Electronic Resource
    Electronic Resource
    Si—O bond structure in slow-ion deposited SiO2 films (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 3354-3356 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By impinging a beam of O+2 ions of energy 150 eV〈E〈1 keV on a Si(100) surface, we produced oxide films of varying thickness at room temperature. We find that the Si—O bond features of the films are quite similar to those of a thermally prepared vitreous SiO2 glass. We further observe that an intermediate range order in the form of n-member ring clusters with n=4 and n=6 exists in the resulting films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348565
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  • 2
    Electronic Resource
    Electronic Resource
    Differential expression of phospholipase D1 in the developing retina (2002)
    Oxford, UK : Blackwell Science, Ltd
    European journal of neuroscience 15 (2002), S. 0 
    Details
    ISSN: 1460-9568
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Expression patterns of phospholipase D1 (PLD1) in the developing rat retina were investigated using immunocytochemistry and Western blot analysis and compared with the expression patterns of glutamine synthetase. PLD1 immunoreactivity appeared first in a few neuroblasts in the middle of the mantle zone of the primitive retina by embryonic (E) day 13. PLD1-immunoreactive primitive ganglion cells were characterized in the ganglion cell layer by E17. Faint immunoreactivity at E17 profiled radially orientated cells and this pattern appeared up to postnatal (P) day 7. In the ganglion cell layer at P3, displaced amacrine cells and ganglion cells were classified. At P5, presumptive horizontal cells and amacrine cells were identified. By P7, a thin outermost layer of newly formed segments of the photoreceptor cells was also PLD1 immunoreactive. PLD1 immunoreactivity at P8 was limited to radial Müller cells and the outer segment layer of the photoreceptor cells, and the expression pattern was conserved to adulthood. Western blot analysis showed relatively high amounts of PLD1 protein at E17 and P3, a decrease at P7, and moderate amounts from P8 onward. Co-expression of PLD1 with glutamine synthetase in the retina appeared first after birth in differentiating neurons and in Müller cells by P8; thereafter the pattern was maintained. The expression pattern of the PLD1 during development of the retina suggests that PLD1 plays important roles in glutamate-associated differentiation of both specific neurons and radial glial cells, and in glutamate-mediated cellular signalling in Müller cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-9568.2002.01939.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ultraviolet Absorption Spectra of 2-Substituted 8-Quinolinols (1951)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 73 (1951), S. 630-632 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01146a040
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  • 4
    Electronic Resource
    Electronic Resource
    Computed tomography of cavernous sinus diseases (1988)
    Springer
    Neuroradiology 30 (1988), S. 319-328 
    Details
    ISSN: 1432-1920
    Keywords: Cavernous sinus ; Computed tomography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We retrospectively analyzed CT scans of 21 cavernous sinus lesions in an attempt to discover CT findings helpful to the differential diagnosis. With the integration of various CT observations it was possible to categorize the lesions into inflammatory, vascular, benign neoplastic and malignant metastatic lesions with few exceptions. Four of 5 cases of septic cavernous sinus thrombophlebitis revealed unilateral or bilateral multiple irregular filling defects in the enhancing cavernous sinus with or without orbital inflammatory change. Four of 5 cases of carotid-cavernous fistula demonstrated unilateral or bilateral diffuse bulging and homogeneous enhancement of the cavernous sinus with obliteration of normal low densities of cranial nerves and gasserian ganglion. Dilatation and tortuosity of superior ophthalmic vein were also associated. Four of 5 cases of benign neoplastic lesion showed well-circumscribed enhancing masses confined to the cavernous sinus with pressure erosion or hyperostosis of adjacent bone. Five of 6 cases of malignant metastatic lesion showed changes suggesting malignancy such as destruction of adjacent bone or associated manifestations of intracranial spread. As compared with the axial scan, coronal scans proved to be more sensitive in detection of subtle cavernous sinus expansion, and superior in evaluation of intracavernous neural structures, relationships with the pituitary gland and changes in the skull base. Axial scans, however, were superior in detection of associated orbital and intracranial abnormalities. Scans in both projections are needed in the evaluation of most cavernous sinus diseases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00328183
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  • 5
    Electronic Resource
    Electronic Resource
    Helical CT anatomy of pancreatic arteries (1996)
    Springer
    Abdominal imaging 21 (1996), S. 517-521 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Pancreas, anatomy—Pancreas, computed tomography—Computed tomography, helical technology.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Background: To assess the frequency of visualization of pancreatic arteries in the arterial phase of helical computed tomography (CT). Methods: The visibility of pancreatic and peripancreatic arteries in helical CT images was evaluated in 20 consecutive patients who had no evidence of pancreatic disease. CT examinations were performed by using a continuously rotating CT scanner and intravenous injection of contrast media. The scans were taken 35 s after the start of injection and with a table speed of 3 mm/s. Images were reconstructed in 3-mm section increments. Results: Frequently visualized arteries were the gastroduodenal, anterior and posterior superior pancreaticoduodenal, and right gastroepiploic arteries. Infrequently visualized arteries were the dorsal pancreatic, pancreatica magna, caudal pancreatic, transverse pancreatic, and common, anterior, and posterior inferior pancreaticoduodenal arteries. Conclusion: Helical CT enabled us to recognize small pancreatic arteries, and the evaluation of these arteries should be considered in the staging of pancreatic carcinoma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900117
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Hepatic abnormalities related to blood flow: evaluation with dual-phase helical CT (1999)
    Springer
    Abdominal imaging 24 (1999), S. 340-356 
    Details
    ISSN: 1432-0509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900512
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  • 7
    Electronic Resource
    Electronic Resource
    Chronic tuberculous epididymitis: color Doppler US findings with histopathologic correlation (2000)
    Springer
    Abdominal imaging 25 (2000), S. 559-562 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Tuberculous epididymitis—Tuberculous epididymo-orchitis—Ultrasound (US)—Color Doppler US—Power Doppler US.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: The aim of this study was to determine the color Doppler features of tuberculous epididymitis and to correlate these findings with histopathologic findings. Methods: Color Doppler ultrasound (US) findings of 12 histopathologically proven tuberculous epididymitis and tuberculous epididymo-orchitis in 11 consecutive patients were retrospectively analyzed. Color Doppler US findings of tuberculous epididymitis were correlated with histopathologic findings. Results: Color Doppler US findings of tuberculous epididymitis demonstrated no blood flow in the epididymal lesions except for focal linear or spotty flow signals in the peripheral portion. These findings correlated well with pathologic findings; the central portion of the epididymal lesions demonstrated granulomas with caseation necrosis, and the peripheral portion of the epididymal lesions had several medium to small vessels. Conclusions: Color Doppler US may be helpful for differential diagnosis of tuberculous epididymitis and non–tuberculous epididymitis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/s002610000092
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Vibrational property of the slow N 2 + ions deposited SiNx films (1994)
    Springer
    Applied physics 59 (1994), S. 445-448 
    Details
    ISSN: 1432-0630
    Keywords: 61.14 ; 68.55
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We have investigated vibrational properties of silicon-nitride films, SiNx (0.3≤×≤1.33), produced by a non-thermal method using high-resolution electron energy loss spectroscopy. The results, based on a continuous random network model assuming a planar XY3 vibrational bond unit, show that the Si-N bonds in the films closely resemble those in typical thermal silicon nitride although nitrogens occupy some metastable binding sites. We estimate force constants of the restoring forces for a Si3N bond unit, which tend to increase gradually with increasing nitrogen content x. In particular, the central force constant k1 for the in-plane stretching mode of silicon atoms varies with x in the range 297≤k≤331 N/M, larger than the theoretical value for a nitrogen atom imbedded in a pure Si crystal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331727
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  • 9
    Electronic Resource
    Electronic Resource
    Angle-resolved photoemission study of the Li-induced structures of the Si(001) surface (1995)
    Springer
    Applied physics 60 (1995), S. 35-40 
    Details
    ISSN: 1432-0630
    Keywords: 73.20 ; 79.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We have investigated dispersion relations of surface bands induced by Li adsorption on the Si(001) surface at room temperature by Angle-Resolved PhotoE-mission Spectroscopy (ARPES). The characteristic spectral changes in the Energy Distribution Curves (EDCs) with increasing Li coverage implicate that Li adatoms occupy on-top sites of the dimer-forming silicon atoms resulting in 0.5 and 1.0 monolayers for the completion of the first two Li-induced ordered (2×2): Li and (2×1): Li phase, respectively. The unique upward dispersions of the surface bands for these Li-induced structures are ascribed to the size effect of a Li adatom. We further discuss a mechanism which might account for the metallie peak found at the early stage of Li adsorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01577610
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Angle-resolved photoemission study of the Li-induced structures of the Si(001) surface (1995)
    Springer
    Applied physics 60 (1995), S. 35-40 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 73.20; 79.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. We have investigated dispersion relations of surface bands induced by Li adsorption on the Si(001) surface at room temperature by Angle-Resolved PhotoEmission Spectroscopy (ARPES). The characteristic spectral changes in the Energy Distribution Curves (EDCs) with increasing Li coverage implicate that Li adatoms occupy on-top sites of the dimer-forming silicon atoms resulting in 0.5 and 1.0 monolayers for the completion of the first two Li-induced ordered (2×2):Li and (2×1):Li phase, respectively. The unique upward dispersions of the surface bands for these Li-induced structures are ascribed to the size effect of a Li adatom. We further discuss a mechanism which might account for the metallic peak found at the early stage of Li adsorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01577610
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    Paper (German National Licenses)
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