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  • 1990-1994  (2)
  • 1985-1989  (2)
  • 1990  (2)
  • 1989  (2)
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  • 1990-1994  (2)
  • 1985-1989  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Sideways Killing: The Cytolysis of Fc Receptor-Bearing Cells through Bridging to Cytolytic T Lymphocytes by Antibodies Specific for the T-Cell Receptor-T3 Complex (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 29 (1989), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Cytolylic T lymphocytes (CTL) cause cytolysis of foreign or virus-infected syngeneic cells when recognition of the target plus major histocompatibility complex (MHC) occurs via the T-cell receptor (TCR). The recognition event leads to intimate contact between the two cells and activation of the cytolytic effector. Activation and target cell lysis can also occur in the presence of antibodies to the TCR. This is accomplished by bridging the effector cell TCR to the target cell FcR by an anti-TCR monoclonal antibody (MoAb). Recent findings have placed the role of the FcR in this event in a questionable light. We confirm the importance of FcγR by demonstrating that: (a) melanoma cells are killed by CTL clones in the presence of anti-TCR CD3 antibodies only when the melanoma cells express the FcγR on their surface; (b) native Ig, heat-aggregated Ig, or an Fc fragment from an antibody expressing the same isotype as the anti-TCR antibody can block the killing of high avidity FcγRI-bearing cells mediated by anti-TCR antibody (F23.1); and (c) anti-FcγR MoAb (2.4G2)and a truncated soluble FcγRII molecule inhibit the killing of low-avidity FcγRII-bearing cells mediated by anti-CD3 MoAb (145–2C11). Thus, we show that both high-avidity FcγRI and low-avidity FcγRII can mediate sideways killing depending upon the isotype of the anti-TCR antibody and the type of FcR present on the target cell surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1989.tb01170.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Gravity and seismicity analyses of the El Chichon volcano, Chiapas, Mexico (1990)
    Springer
    Pure and applied geophysics 133 (1990), S. 149-165 
    Details
    ISSN: 1420-9136
    Keywords: Volcanic seismicity ; volcanic gravity anomaly ; volcanic tectonics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Subduction induced compressional stress, lateral displacement faults probably linked to the NW extension of the Polochic-Motagua fault system, and local magma emplacement create a complex geological setting for the El Chichon volcano. Gravity analysis reveals that the principal structures in the area correspond to synclines and anticlines. Downward continuation of the gravity field suggests the presence of magma emplacement SE of the volcano. This magmatic emplacement appears to be the principal cause of the truncation of the syncline in which the volcano lies. Analyses of earthquakes occurring after eruptions show that the vertical distribution of events is confined to a roughly cylindrical zone which correlates well with the region of magmatic emplacement inferred from the gravity analysis. Even though more than 350 km separate the volcano from the Middle American trench, the compressional stress regime reported for the area may correlate with subduction stress (N30°E). However, the strike direction for the principal faults in the zone, N60°W, permits us to postulate that the NW extension of the Polochic-Motagua fault system is implicated in the local tectonics of the El Chichon area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876708
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The effects of emitter heating on field ionization mass spectra of nitrogen-containing organic molecules (1989)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 24 (1989), S. 22-26 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Field ionization mass spectra of nitrogen-containing organic compounds were examined as a function of carbon dendrite emitter heating current. The intensities of singly charged molecular, quasimolecular and dimer ions decreased with increasing emitter heating current; whereas, the opposite trend was observed for singly charged fragment ions. The abundance of doubly charged ions originating from aromatic compounds increased with heating current.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210240105
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of collision gas on doubly charged ion mass spectra (1990)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 25 (1990), S. 174-180 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The influence of the collision gas on doubly charged ion mass spectra of a selected number of hydrocarbons has been examined. Relative abundances of various product ions in 2E spectra, resulting from charge exchange collisions of doubly charged hydrocarbon ions, do not vary drastically as the collision gas is varied. However, the absolute intensities of these doubly charged ion mass spectra increase significantly when the collision gas is changed from argon to methane to isobutane. Tbese observations are rationalized in terms of a multichannel diabatic curve crossing model.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210250311
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    Paper (German National Licenses)
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