12 research outputs found

    Estudo eletrocardiográfico de equinos de salto sadios

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    Avaliou-se o eletrocardiograma de 100 equinos sadios praticantes de hipismo clássico modalidade salto, com idades entre 4 e 19 anos, sendo 61 machos e 39 fêmeas, com média de 516,3 kg. Observou-se frequência cardíaca média de 40,20 ±13,33 bpm, sendo o ritmo cardíaco mais freqüente o sinusal (56%). As alterações de ritmo cardíaco estiveram presentes em 38% dos animais estudados, sendo a mais presente o marcapasso migratório (22%), seguido de bloqueio atrioventricular de 2º grau (4%), bloqueio atrioventricular de 1º grau (3%), contração ventricular prematura (2%), contração atrial prematura (1%). Não se observou correlação entre as variáveis estudadas (freqüência cardíaca, ritmo e arritmias) e a capacidade atlética, a idade e o sexo. O escore cardíaco após analise estatística não diferiu entre os grupos quanto ao desempenho atlético, a faixa etária e o sexo. O escore cardíaco, nesta amostra, não se mostrou um parâmetro confiável para se predizer o futuro atlético ou o nível de treinamento do eqüino

    Nucleon form factors, generalized parton distributions and quark angular momentum

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    We extract the individual contributions from u and d quarks to the Dirac and Pauli form factors of the proton, after a critical examination of the available measurements of electromagnetic nucleon form factors. From this data we determine generalized parton distributions for valence quarks, assuming a particular form for their functional dependence. The result allows us to study various aspects of nucleon structure in the valence region. In particular, we evaluate Ji’s sum rule and estimate the total angular momentum carried by valence quarks at the scale μ=2 GeV to be Juv=0.230+0.009−0.024 and Jdv=−0.004+0.010−0.01

    Linkage disequilibrium and association studies in higher plants: Present status and future prospects

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    Radiative π<sup>0</sup> photoproduction on protons in the Δ<sup>+</sup> (1232) region

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    The reaction γp → pπ&lt;sup&gt; &lt;/sup&gt;0γ&lt;sup&gt;′&lt;/sup&gt; has been measured with the Crystal Ball/TAPS detectors using the energy-tagged photon beam at the electron accelerator facility MAMI-B. Energy and angular differential cross-sections for the emitted photon γ&lt;sup&gt;′&lt;/sup&gt; and angular differential cross-sections for the π&lt;sup&gt;0&lt;/sup&gt; have been determined with high statistics in the energy range of the Δ&lt;sup&gt;+&lt;/sup&gt; (1232)-resonance. Cross-sections and the ratio of the cross-section to the nonradiative process γp → pπ &lt;sup&gt;0&lt;/sup&gt; are compared to theoretical reaction models, having the anomalous magnetic moment &lt;i&gt;κ&lt;sub&gt; Δ&lt;/sub&gt;&lt;/i&gt; as free parameter. As the shape of the experimental distributions is not reproduced in detail by the model calculations, currently no extraction of &lt;i&gt;κ&lt;sub&gt; Δ&lt;/sub&gt;&lt;/i&gt; is feasible

    Combined parametrization of GEn and γ∗N→Δ(1232)\gamma^{\ast} N \rightarrow \Delta (1232)γ*N→Δ(1232) quadrupole form factors

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