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  • 1995-1999  (1)
  • 1990-1994  (3)
  • Engineering  (2)
  • Amalgam  (1)
  • Cutaneous T-cell lymphoma  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Failure to detect any effect of amalgam restorations on peripheral blood lymphocyte populations (1992)
    Springer
    Journal of molecular medicine 70 (1992), S. 728-734 
    Details
    ISSN: 1432-1440
    Keywords: Amalgam ; Lymphocytes ; Immune system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Dental amalgam has been considered to have adverse side effects on the immune system. Reports have been contradictory, indicating both an increase and a decrease in peripheral blood lymphocyte counts associated with amalgam restorations. We investigated two groups of patients, one of which was treated with amalgam restorations for the first time. In the other group, all existing amalgam fillings were removed. Prior to and after treatment, we determined the absolute and relative numbers of granulocytes, lymphocytes, monocytes, T cells, B cells, cytotoxic T cells, helper T cells and natural killer cells. In addition, functional investigations of T cells were performed. We failed to find any effect of amalgam restorations on the immune system in terms of the parameters investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00180738
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    γ/δ Receptor-expressing T-cell clones from a cutaneous T-cell lymphoma suppress hematopoiesis (1992)
    Springer
    Annals of hematology 65 (1992), S. 111-115 
    Details
    ISSN: 1432-0584
    Keywords: Interferon-γ ; Hematopoiesis ; γ/δ ; γ/δ T cells ; Cutaneous T-cell lymphoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Recently we described a cutaneous T-cell lymphoma expressing the γ/δ T-cell receptor [5]. The patient suffering from this lymphoma showed low numbers of myeloid and T cells in peripheral blood, while B and NK cells were relatively increased. In vitro culture of the patient's bone marrow (BM) cells revealed a significant suppression of myeloid/monocyte colony formation (GM-CFU) compared with normal controls. This was not due to infiltration of the BM with lymphoma cells. We speculated that a soluble factor either secreted or induced by the lymphoma cells might be responsible for the marked suppression of hematopoiesis in this patient. From a skin biopsy with infiltrating γ/δ T-lymphoma cells we established T-cell clones bearing the γ/δ T-cell receptor and resembling the phenotype of the lymphoma cells. The supernatant (SN) of these γ/δ T-cell clones reduced the number of colonies in a CFU-GM assay (using normal control BM) in comparison to SN of α/β T-cell clones established from the same biopsy. This suppression was seen mainly on day 7 of culture and was not neutralized by the addition of placenta-CM. The main mediator of this suppression seems to be IFN-γ,since it was detectable in high amounts in the SN of these γ/δ T-cell tumor clones as well as in the serum of the patient. In addition, anti-IFN-γ antibodies can reverse the T-cell SN-mediated suppression of CFU-GM. We conclude that high serum levels of interferon-γ, which is secreted in high amounts from γ/δ T-cells grown from a biopsy of a cutaneous lymphoma, can suppress hematopoiesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01695808
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Application of the finite element method to the simulation of sheet forming processes: Comparison of calculations and experiments (1990)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 30 (1990), S. 1415-1430 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Elastic-plastic finite element calculations have been carried out to analyse sheet forming processes such as hydrostatic bulging of circular and rectangular blanks and the axisymmetric stretching of sheets (with different punch radii). The results, partly obtained by different finite element models, are compared with experimental data. It could be shown that, regarding the examples considered, experiments and calculations fit well and that a more sophisticated modelling of the contact boundary conditions improves the accuracy of the results. As a first attempt to handle more complex sheet forming operations, the deep drawing of a rectangular cup has been analysed. A summary of the theoretical background as well as some comments on the solution method and the implementation are given.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620300806
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    RECURSIVE MULTIDIMENSIONAL INTEGRATION (1997)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 40 (1997), S. 1923-1935 
    Details
    ISSN: 0029-5981
    Keywords: recursive autoadaptive multidimensional numerical integration ; Engineering ; Numerical Methods and Modeling
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: This article introduces quadtree and octree like methods to numerical integration. Four recursive and auto-adaptive algorithms are presented: one for two-dimensional integrals over a triangular region, one for two-dimensional integrals over a quadrilateral region, one for three-dimensional integrals over a tetrahedral region and one for three-dimensional integrals over a cubic region. The algorithms have been proven to work fast. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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