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| 2. |
- Evangelista, C, et al.
(author)
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Measurement of the (p)over-barp->KsKs reaction for 0.6 to 1.9 GeV/c
- 1997
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In: PHYSICAL REVIEW D. - : AMER INST PHYSICS. - 0556-2821. ; 56:7, s. 3803-3810
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Journal article (peer-reviewed)abstract
- The <(p)over bar p> --> KSKS --> 4 pi(+/-) cross section was measured at incident antiproton momenta between 0.6 and 1.9 GeV/c using the CERN Low Energy Antiproton Ring. This investigation was part of a systematic study of in-flight antiproton-proton anni
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| 3. |
- Evangelista, C, et al.
(author)
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Study of the reaction (p)over-bar-p ->phi phi from 1.1 to 2.0 GeV/c
- 1998
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In: PHYSICAL REVIEW D. - : AMERICAN PHYSICAL SOC. - 0556-2821. ; 57:9, s. 5370-5381
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Journal article (peer-reviewed)abstract
- A study has been performed of the reaction <(p)over bar p>-->4K(+/-) using in-flight antiprotons from 1.1 to 2.0 GeV/c incident momentum interacting with a hydrogen jet target. The reaction is dominated by the production of a pair of phi mesons. The <(p)o
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| 5. |
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| 6. |
- Maurer, D, et al.
(author)
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Peripheral blood dendritic cells express Fc epsilon RI as a complex composed of Fc epsilon RI alpha- and Fc epsilon RI gamma-chains and can use this receptor for IgE-mediated allergen presentation
- 1996
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In: Journal of Immunology. - : American association of immunologists. - 0022-1767 .- 1550-6606. ; 157:2, s. 607-616
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Journal article (peer-reviewed)abstract
- Originally limited to basophils and mast cells, the spectrum of high affinity IgE receptor (Fc epsilon RI-bearing cells has expanded recently to include Langerhans cells, dermal dendritic cells (DC), monocytes, and eosinophils. As a result of studies on the distribution, structure, and function of Fc epsilon RI on APCs, we discovered a minor nonbasophil, nonmonocyte PBMC population that can bind IgE via Fc epsilon RI. This receptor occurs on the surface of these cells as a multimeric structure containing Fc epsilon RI alpha- and Fc epsilon RI gamma-chains but, unlike its counterpart on basophils, lacking Fc epsilon RI beta. Further experiments revealed that these Fc epsilon RI alpha gamma-expressing cells closely resemble peripheral blood DC by immunophenotype (HLA-DRhigh, HLA-DQhhigh; CD4+, CD11a+, CD32+, CD33+, B7/2 (CD86)+; CD11blow, CD14low, CD40low, CD54low, CD64low) and cell morphology. These features allowed us to isolate Fc epsilon RI-expressing DC from the peripheral blood and to investigate their immunostimulatory properties. We found Fc epsilon RI-positive DC to be efficient stimulators of both primary (allogeneic MLR) and Fc epsilon RI/IgE-dependent, secondary T cell responses at low cell numbers. Thus, Fc epsilon RI-expressing DC may not only amplify established type I allergic immune reactions but, unlike Fc epsilon RI-positive semiprofessional APCs, may be able to prime naive T cells to common and/or cryptic epitopes of IgE-reactive Ags.
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| 7. |
- Schoner, A, et al.
(author)
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Hall effect investigations of 4H-SiC epitaxial layers grown on semi-insulating and conducting substrates
- 1999
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In: Materials Science & Engineering. - 0921-5107 .- 1873-4944. ; 61-2, s. 389-394
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Journal article (peer-reviewed)abstract
- Nitrogen- and aluminum-doped 4H silicon carbide epitaxial layers were grown simultaneously on semi-insulating and conducting substrates. The layers were investigated by conventional van der Pauw Hall effect measurements and for comparison also with secondary ion mass spectrometry and capacitance voltage measurements. It was found, that the carrier concentration in the layers grown on conducting substrates were overestimated by the Hall effect measurement, which leads to an underestimation of the ionization energy of the main dopant, as compared to the layer grown on semi-insulating substrates. The difference can be explained by a two-layer Hall effect model. (C) 1999 Elsevier Science S.A. All rights reserved.
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