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  • 2000-2004  (4)
  • 1990-1994  (3)
  • 1
    Digitale Medien
    Digitale Medien
    Finite element analysis of the possible mechanism of cervical lesion formation by occlusal force (2003)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 30 (2003), S. 0 
    Details
    ISSN: 1365-2842
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: summary  Recently, various authors have proposed the interesting idea that occlusal force may be a principal factor in cervical lesions of the tooth. It is speculated that the lateral force in non-ideal mastication causes the tooth to bend and that the resulting tensile stress damages the enamel surface. In this study, we carried out stress analysis on the upper central incisor and the lower first molar using the plastic–elastic deformation theory with two-dimensional finite element method (FEM). The essential feature that the tensile yield strength is much smaller than the compressive one was taken into account. Our results suggested that oblique loading on the tooth stretches the enamel surface near the cemento-enamel junction and causes plastic deformation which eventually leads to the cervical lesion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2842.2003.00959.x
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  • 2
    Digitale Medien
    Digitale Medien
    Free Volumes in Amine-Cured Epoxy Studied by Positron Annihilation (1992)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 105-110 (Jan. 1992), p. 1745-1748 
    Details
    ISSN: 1662-9752
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Maschinenbau
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/59/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.105-110.1745.pdf
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  • 3
    Digitale Medien
    Digitale Medien
    The acceleration of cosmic-ray protons in the supernova remnant RX J1713.7–3946 (2002)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 416 (2002), S. 823-826 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Protons with energies up to ∼1015 eV are the main component of cosmic rays, but evidence for the specific locations where they could have been accelerated to these energies has been lacking. Electrons are known to be accelerated to cosmic-ray energies in supernova ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/416823a
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  • 4
    Digitale Medien
    Digitale Medien
    Geographic variation in the field response of male European pine sawflies, Neodiprion sertifer, to different pheromone stereoisomers and esters (2000)
    Springer
    Entomologia experimentalis et applicata 95 (2000), S. 229-239 
    Details
    ISSN: 1570-7458
    Schlagwort(e): Hymenoptera ; Symphyta ; Diprionidae ; sawfly ; pest insect ; semiochemical ; chemical communication ; diprionol ; 3,7-dimethyl-2-pentadecanol
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The European pine sawfly, Neodiprion sertifer (Geoffroy) (Hymenoptera: Diprionidae), is a widespread and economically important forest insect. The sex pheromone communication system of this species has been previously investigated in North America, Japan and Europe, with the acetate or propionate of the alcohol (2S,3S,7S)-3,7-dimethyl-2-pentadecanol (diprionol) shown to be the main pheromone component. In some locations, male attraction either increased or decreased by the addition of the (2S,3R,7R)-diprionyl acetate isomer. However, these studies were made with different batches of synthetic pheromones, with different types of traps and according to different procedures, so the observed differences might not reflect true geographic variation. Here we investigate the geographic pattern of male sawfly response by using identical chemicals, traps and experimental procedures at eight field sites ranging from Japan in the east to Canada in the west. We found an increased inhibitory effect of the (2S,3R,7R)-isomer from Japan and Siberia to Europe. At the eastern sites, increasing amounts of the (2S,3R,7R)-isomer up to and equal to the amount of the (2S,3S,7S )-isomer, did not influence the trap catch, whereas at sites in Europe, as little as 1% of the (2S,3R,7R)-isomer almost completely inhibited the attraction. The response of the North American population was intermediate. The only site in which the (2S,3R,7R)-isomer was essential for the attraction of males was in Siberia. A similar pattern was found for the (2S,3R,7S)-isomer. Both the acetate and the propionate form of the (2S,3S,7S)-isomer were attractive by themselves in Japan, Europe and North America, and neither the (2S,3R,7S)-isomer nor the (2S,3R,7R)-isomer alone were attractive, in the acetate or propionate form. We discuss the significance of our findings for the development of more efficient monitoring schemes and for the causes of population divergence and speciation in the European pine sawfly.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1004000920862
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  • 5
    Digitale Medien
    Digitale Medien
    Large-N collective field theory of electrons around a large-Z nucleus (1992)
    Springer
    The European physical journal 53 (1992), S. 391-397 
    Details
    ISSN: 1434-6052
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The large-N collective field formalism developed by Jevicki and Sakita is applied to the many electron system around a large-Z nucleus. It is shown that the well known energy level of the hydrogenlike atom can be reproduced as the excitation spectrum of the charge density vibration. The structure of atomic electron system with short-range repulsive interaction is investigated within the high-density approximation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01625897
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  • 6
    Digitale Medien
    Digitale Medien
    The protease from Vibrio Cholerae nicks arginine at position 192 from the N-terminus of the heat-labile enterotoxin a subunit from enterotoxigenic Escherichia Coli (1992)
    Springer
    European journal of epidemiology 8 (1992), S. 743-747 
    Details
    ISSN: 1573-7284
    Schlagwort(e): EnterotoxigenicEscherichia coli ; Yibrio cholerae ; LT ; CT
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract It was examined where a protease purified from Vibrio cholerae might nick the heat-labile enterotoxin (LT) A subunit from enterotoxigenicEscherichia coli. LT was digested by the protease and contained a fragment which had the same mobility on SDS-PAGE as that of the Al fragment of LT digested by trypsin. The biological activity of LT by this protease was also identical to that of LT by trypsin. The amino acid sequence of the N-terminus of the A2-like fragment was Thr-Ser-Thr-Gly, which corresponded to the sequence from 193 to 196 of the A subunit. These data suggest that this protease, like trypsin, nicks arginine at position 192 from the N-terminus of the A subunit and that the biological activation of LT by this protease is similar to that by trypsin.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00145394
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  • 7
    Digitale Medien
    Digitale Medien
    Effect of cyclosporine therapy on idiopathic membranous nephropathy presented with refractory nephrotic syndrome (2000)
    Springer
    Clinical and experimental nephrology 4 (2000), S. 81-85 
    Details
    ISSN: 1437-7799
    Schlagwort(e): Key words Membranous nephropathy ; Nephrotic syndrome ; Cyclosporine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Background. Recent studies suggested the possible benefits of cyclosporine (CsA) therapy in patients with membranous nephropathy, although most of these studies were short-term. An uncontrolled retrospective study was undertaken to evaluate the long-term effect of CsA therapy on idiopathic membranous nephropathy presented with refractory nephrotic syndrome. Methods. The subjects were eight patients with idiopathic membranous nephropathy presenting with refractory nephrotic syndrome. All patients had received a course of corticosteroid therapy before CsA therapy, and had not responded to the corticosteroid, including one or two administrations of intravenous methylprednisolone pulse therapy. The CsA doses were adjusted to maintain trough blood level at 100 ng/ml during the first 3 months and then reduced to maintain the level at 50 ng/ml in patients who had responded to partial remission. Results. CsA therapy induced a marked decrease in proteinuria from the first month, and a significant decrease from month 3 and thereafter. The mean serum total protein and albumin levels rose, and total cholesterol fell significantly with CsA therapy. The serum creatinine level was unchanged during CsA therapy. Three patients showed complete remission and two were in partial remission, while three were nephrotic at 12 months of CsA therapy. From 18 to 24 months of CsA therapy, three patients were in complete remission, four were in partial remission, and one patient was nephrotic. There were no side effects of CsA, except for gum hyperplasia and hypertrichosis in one patient. Conclusion. These results suggest that long-term CsA therapy at a low or moderate dose is potentially effective and safe in most nephrotic patients with idiopathic membranous nephropathy refractory to corticosteroid therapy.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s101570050068
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