2,997 research outputs found

    Adubação Fosfatada para Cultivares de Mamoneira na região Sul do Rio Grande do Sul.

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    Seleção entre e dentro de progênies de meios-irmãos de cajueiro via REML/BLUP.

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    A estratégia para a obtenção de clones no programa de melhoramento genético do cajueiro da Embrapa Agroindústria Tropical é avaliar tanto genótipos prospectados em pomares comerciais quanto indivíduos selecionados via melhoramento populacional. Assim, o objetivo do trabalho foi identificar progênies de meio-irmãos e indivíduos agronomicamente superiores, dentro das progênies, para subsidiar a etapa posterior do programa.bitstream/item/211417/1/BP-198.pd

    Antibiose em genótipos de Paspalum spp. à cigarrinha Mahanarva spectabilis (Hemipetera: Cercopidae).

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    Os gêneros Urochloa e Panicum representam 92% das pastagens cultivadas brasileiras. O gênero Paspalum apresenta espécies nativas com potencial forrageiro, sendo uma alternativa para a diversificação das pastagens

    Antixenose em genótipos de Paspalum notatum à cigarrinha Mahanarva spectabilis (Hemipetera: Cercopidae).

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    As gramíneas são as principais componentes de paisagens antrópicas. Apesar da grande diversidade da flora brasileira, um número pequeno de espécies é cultivado como pastagens e cobertura do solo (gramados)

    Systematic study of charged-pion and kaon femtoscopy in Au++Au collisions at sNN\sqrt{s_{_{NN}}}=200 GeV

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    We present a systematic study of charged pion and kaon interferometry in Au++Au collisions at sNN\sqrt{s_{_{NN}}}=200 GeV. The kaon mean source radii are found to be larger than pion radii in the outward and longitudinal directions for the same transverse mass; this difference increases for more central collisions. The azimuthal-angle dependence of the radii was measured with respect to the second-order event plane and similar oscillations of the source radii were found for pions and kaons. Hydrodynamic models qualitatively describe the similar oscillations of the mean source radii for pions and kaons, but they do not fully describe the transverse-mass dependence of the oscillations.Comment: 499 authors, 27 pages, 13 figures, and 11 tables. v2 is the version accepted for publication in Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.htm

    Measurement of higher cumulants of net-charge multiplicity distributions in Au++Au collisions at sNN=7.7200\sqrt{s_{_{NN}}}=7.7-200 GeV

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    We report the measurement of cumulants (Cn,n=14C_n, n=1\ldots4) of the net-charge distributions measured within pseudorapidity (η<0.35|\eta|<0.35) in Au++Au collisions at sNN=7.7200\sqrt{s_{_{NN}}}=7.7-200 GeV with the PHENIX experiment at the Relativistic Heavy Ion Collider. The ratios of cumulants (e.g. C1/C2C_1/C_2, C3/C1C_3/C_1) of the net-charge distributions, which can be related to volume independent susceptibility ratios, are studied as a function of centrality and energy. These quantities are important to understand the quantum-chromodynamics phase diagram and possible existence of a critical end point. The measured values are very well described by expectation from negative binomial distributions. We do not observe any nonmonotonic behavior in the ratios of the cumulants as a function of collision energy. The measured values of C1/C2=μ/σ2C_1/C_2 = \mu/\sigma^2 and C3/C1=Sσ3/μC_3/C_1 = S\sigma^3/\mu can be directly compared to lattice quantum-chromodynamics calculations and thus allow extraction of both the chemical freeze-out temperature and the baryon chemical potential at each center-of-mass energy.Comment: 512 authors, 8 pages, 4 figures, 1 table. v2 is version accepted for publication in Phys. Rev. C as a Rapid Communication. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.htm

    ϕ\phi meson production in dd++Au collisions at sNN=200\sqrt{s_{_{NN}}}=200 GeV

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    The PHENIX experiment has measured ϕ\phi meson production in dd++Au collisions at sNN=200\sqrt{s_{_{NN}}}=200 GeV using the dimuon and dielectron decay channels. The ϕ\phi meson is measured in the forward (backward) dd-going (Au-going) direction, 1.2<y<2.21.2<y<2.2 (2.2<y<1.2-2.2<y<-1.2) in the transverse-momentum (pTp_T) range from 1--7 GeV/cc, and at midrapidity y<0.35|y|<0.35 in the pTp_T range below 7 GeV/cc. The ϕ\phi meson invariant yields and nuclear-modification factors as a function of pTp_T, rapidity, and centrality are reported. An enhancement of ϕ\phi meson production is observed in the Au-going direction, while suppression is seen in the dd-going direction, and no modification is observed at midrapidity relative to the yield in pp++pp collisions scaled by the number of binary collisions. Similar behavior was previously observed for inclusive charged hadrons and open heavy flavor indicating similar cold-nuclear-matter effects.Comment: 484 authors, 16 pages, 12 figures, 6 tables. v1 is the version accepted for publication in Phys. Rev. C. Data tables for the points plotted in the figures are given in the paper itsel
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