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  • American Institute of Physics (AIP)  (3)
  • American Society of Hematology  (2)
  • Public Library of Science
  • 1995-1999  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Broadening of CH3F in presence of Stark fields. II. Collisional coupling between the Stark components (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 110 (1999), S. 9418-9425 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The collisional line shape of methyl fluoride rotational transitions J,K=2,2→3,2 and 5,5→6,5 is observed under the effect of a static electric field. The collisional coupling between partially overlapping Stark components is studied under two particularly favorable conditions: first, the degree of overlapping can be set by both the electric field and the pressure, second, we have a calculated collisional relaxation matrix checked on both well isolated and completely unresolved Stark components. This allows us to obtain better insight into the collisional coupling effect and to show definitely that this effect explains the difference between collisional linewidths of the CH3F rotational transitions and of their Stark components. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.478906
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Mid-infrared and near-infrared properties of SrTiO3 from transmission and reflection measurements (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 5270-5274 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We measured transmittance and reflectance spectra of commercial SrTiO3 crystals in the infrared region (25–12 000 cm−1). The reflectance R(ν) spectra confirm recent results. The transmittance T(ν) spectra show that SrTiO3 is transparent above 1000 cm−1, while the model usually employed to describe the complex dielectric function of SrTiO3 predicts a negligible transmittance in all the infrared region. By combining T(ν) and R(ν) spectra, we directly determine the frequency dependence of the refractive indices n and k which accounts for the spectra measured in the mid-infrared and near-infrared range. This result will be important for a correct analysis of the infrared spectra of films deposited on SrTiO3. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363513
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Broadening of CH3F in presence of Stark fields. I. Self-broadening and self-shifting of isolated components (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 8995-9003 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Self-broadening and shifting of methyl fluoride 12CH3F have been investigated in the 50–408 GHz range for the rotational transitions J=0→1, J=1→2, J=2→3, J=5→6, and J=7→8 and for their ΔM=0 and ΔM=±1 Stark components, as they were resolved by an appropriate field. The different results obtained for M-degenerated and M-resolved cases, as well as the M dependence of the results has been interpreted theoretically within semiclassical perturbative approximations. Evidence of collisional coupling effects between Stark components was obtained. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.474032
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  • 4
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    Chemoattractant-induced changes in surface expression and redistribution of a functional ligand for P-selectin on neutrophils (1996)
    American Society of Hematology
    Details
    Publication Date: 1996-03-01
    Description: Adhesion between platelets and neutrophils is mediated through the interaction of P-selectin on activated platelets with a carbohydrate- containing structure on neutrophils, and occurs under both static and shear conditions. Recent studies using flow chambers have shown that neutrophils become activated after binding to surface-adherent platelets expressing P-selectin. The objective of the present study was to investigate the effect of such activation on the interactions of platelet P-selectin with its ligand on neutrophils. Flow cytometric analyses using P-selectin chimeras revealed that activation induced a rapid and marked reduction in chimera binding, with levels of binding decreased by 71% after 15 minutes of stimulation with the chemotactic agent, FMLP. Using a visual assay of platelet-neutrophil rosetting, we showed that the P-selectin ligand was translocated and clustered at the uropod of neutrophils following the shape changes and polarization induced by chemotactic stimulation. Activated neutrophils bound to surface-adherent platelets also displayed the clustering of P-selectin ligand at the uropod, and these neutrophils detached from the platelets when a shear stress (2 dynes/cm2) was applied through the adhesion chamber. These results indicate that chemotactic stimulation of neutrophils induces changes in the surface expression and distribution of a biologically relevant ligand for P-selectin, and that these changes might influence the adhesive interactions occurring between neutrophils and activated platelets.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
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  • 5
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    Chemoattractant-induced changes in surface expression and redistribution of a functional ligand for P-selectin on neutrophils (1996)
    American Society of Hematology
    Details
    Publication Date: 1996-03-01
    Description: Adhesion between platelets and neutrophils is mediated through the interaction of P-selectin on activated platelets with a carbohydrate- containing structure on neutrophils, and occurs under both static and shear conditions. Recent studies using flow chambers have shown that neutrophils become activated after binding to surface-adherent platelets expressing P-selectin. The objective of the present study was to investigate the effect of such activation on the interactions of platelet P-selectin with its ligand on neutrophils. Flow cytometric analyses using P-selectin chimeras revealed that activation induced a rapid and marked reduction in chimera binding, with levels of binding decreased by 71% after 15 minutes of stimulation with the chemotactic agent, FMLP. Using a visual assay of platelet-neutrophil rosetting, we showed that the P-selectin ligand was translocated and clustered at the uropod of neutrophils following the shape changes and polarization induced by chemotactic stimulation. Activated neutrophils bound to surface-adherent platelets also displayed the clustering of P-selectin ligand at the uropod, and these neutrophils detached from the platelets when a shear stress (2 dynes/cm2) was applied through the adhesion chamber. These results indicate that chemotactic stimulation of neutrophils induces changes in the surface expression and distribution of a biologically relevant ligand for P-selectin, and that these changes might influence the adhesive interactions occurring between neutrophils and activated platelets.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
    Location Call Number Expected Availability
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    PAPER CURRENT
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