51,757 research outputs found
Agropyron mendocinum Parodi
No full textCarbone Lucas M. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Herbario ACOR; Argentina.Isotipo de: Agropyron mendocinum Parodi.
Especie descripta en base a este ejemplar: Agropyron mendocinum Parodi, Revista Mus. La Plata, Secc. Bot. 3: 14, f. 2-3. 1940.
Nombre Científico Válido: Elymus mendocinus (Parodi) Á. Löve.
Lugar de recolección: Argentina: Prov. Mendoza: San Rafael, Pampa del Plateado, 2500 m snm.
Fecha: 17/01/1926.
Colectores: T. & B Mácola P-8.
Catálogo ACOR: Mácola 3129.Carbone Lucas M. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Herbario ACOR; Argentina
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
A track finding algorithm based on pixel detector for the ATLAS second level trigger
No full textA fast track reconstruction algorithm for the ATLAS second level trigger is presented. The timing performance (3.5 ms for a jet reconstruction at low luminosity) is satisfactory; the transverse impact parameter resolution (75 mu m) is sufficient to perform an on- line b-tagging, and the full three-dimensional reconstruction produces good seeds for more sophisticated track searches. (4 refs)
Humoral and cellular immunity in spontaneous feline infectious peritonitis
No full textHUMORAL AND CELLULAR IMMUNITY IN SPONTANEOUS FELINE INFECTIOUS PERITONITIS
Paltrinieri S.*, Cammarata Parodi M.**, Cammarata G.**, Comazzi S.*
* Istituto di Patologia Generale Veterinaria - Milano - Italy; ** Istituto di Anatomia Patologica Veterinaria e Patologia Aviare - Milano - Italy
Vascular lesions in Feline Infectious Peritonitis (FIP) are thought to be caused by a type III hypersenstivty reaction, while histology of the granulomas suggest a type IV hypersensitivity. To further investigate the pathogenesis of the disease we analized some aspects of humoral and cellular immunity in FIP. Haematology, antibody titers and protein electrophoresis in serum and in effusions from 48 FIP affected cats were studied. The results were compared with those of 20 healthy cats. The distribution of the immune cell and of the virus in FIP lesions were also studied by immunohistochemistry using antibodes against myelomonocytic (MAC387), and lymphoid (CD3, CD4 and CD8 for T-cells and IgM and IgG for B-cells) antigens.
Seropositive animals (antibody titer>1:100) were present either among the FIP infected cats (73%) either among the healthy cats (72%). FIP infected cats had neutrophilic leukocytosis (P>0.05), lymphopenia (P<0.05) and hyperglobulinemia (P<0.01) with increased 2 (P<0.05) and globulins (P<0.001). Hypergammaglobulinemia was not related to the antibody titers, suggesting the presence of other proteins with motility (e.g. complement fractions such as C1q). These changes were found either in effusive or in non effusive FIP. The electrophoretic pattern of the effusions was always similar to those of the corresponding serum. Antibody titers higher than those of the corresponding serum were often detected in the effusions. Immunohistochemical findings were not related to the antibody titers, but they were related to the histology of the lesions. In cellular foci of FIP lesions many virus-infected macrophages and few lymphocytes, mainly CD4+ve, were found. Extracellular viral and myelomonocytic antigen were also detectable in the foci with intercellular necrosis. Only few FIPV-infected cells were present at the periphery of the larger necrotic foci: in these lesions MAC387+ve cells were mainly neutrophils, with many MAC387-ve macrophages, may be due to their activated state: a mild number of lymphocytes, with an increasing percentage of CD8+ve cells were present. Lymphocytes were more abundant when cellular foci and FIP infected macrophages were centered around neoformed vessels. IgM and IgG exposing B-cells were always few and scattered.
In conclusion the simoultaneous analysis of body fluids and of the cellular composition of the lesions showed a complex immune status, on which type III and type IV hypersenstivty could cohexist
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Revised clinical diagnostic criteria for Tako-tsubo syndrome: The Tako-tsubo Italian Network proposal
No full textMeasurement of b-hadron masses
No full textMeasurements of b-hadron masses are performed with the exclusive decay modes B +→J/ψK +, B 0→J/ψK +, B0→J/ψKS0, Bs0→J/ψφ and Λb0→J/ψΛ using an integrated luminosity of 35pb -1 collected in pp collisions at a centre-of-mass energy of 7 TeV by the LHCb experiment. The momentum scale is calibrated with J/ψ→μ +μ - decays and verified to be known to a relative precision of 2 ×10 -4 using other two-body decays. The results are more precise than previous measurements, particularly in the case of the Bs0 and Λb0 masses
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
No full textAn analysis of B+ → K0
Sπ+ and B+ → K0
S K+ decays is performed with the LHCb experiment. The pp
collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-ofmass
energies of
√
s = 7 TeV and
√
s = 8 TeV, respectively. The ratio of branching fractions and the
direct CP asymmetries are measured to be B(B+ → K0
S K+
)/B(B+ → K0
Sπ+
) = 0.064 ± 0.009 (stat.) ±
0.004 (syst.), ACP(B+ → K0
Sπ+
) = −0.022 ± 0.025 (stat.) ± 0.010 (syst.) and ACP(B+ → K0
S K+
) =
−0.21 ± 0.14 (stat.) ± 0.01 (syst.). The data sample taken at
√
s = 7 TeV is used to search for
B+
c
→ K0
S K+ decays and results in the upper limit ( fc · B(B+
c
→ K0
S K+
))/( fu · B(B+ → K0
Sπ+
)) <
5.8 × 10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ¯b
quark
into a B+
c or a B+ meson, respectively
Uno strumento interattivo per la progettazione di sistemi di illuminazione in gallerie stradali
No full text- …
