540 research outputs found
Sexta prova brasileira de produção de leite a pasto do zebu leiteiro no Centro de Tecnologia para Raças Zebuínas Leiteiras da Embrapa Cerrados: caderno de resultados para novilhas da raça Gir Leiteiro.
O Brasil tem o segmento da pecuária leiteira como atividade econômica relevante nas áreas rurais da maioria dos municípios do bioma Cerrado. Esse cenário favorável de produção de leite e carne vincula-se ao predomínio de animais Bos indicus ou Zebu no rebanho nacional, porque são animais adaptados às condições ambientais do Cerrado brasileiro. Essa é uma condição essencial para a viabilidade econômica dos sistemas de produção. Nesse sentido, selecionar fêmeas com potencial para serem melhoradoras promove o progresso genético e contribui na escolha da base genética de rebanhos Gir leiteiro, além de seus cruzamentos comerciais. Esses fatores são a base para a produção sustentável de leite a pasto. A Sexta Prova Zootécnica de Produção de Leite a Pasto, realizada pela Embrapa Cerrados e pela Associação de Criadores do Zebu do Planalto (ACZP), teve como objetivo selecionar as melhores novilhas da raça Gir Leiteiro por meio da mensuração de importantes parâmetros econômicos para a produção de leite em condição de pastagem no bioma Cerrado. Essa é a única prova brasileira de avaliação da lactação completa de novilhas zebuínas a pasto. Esse teste zootécnico ocorreu nas condições climáticas da região de Brasília, DF, sem receber estímulo hormonal para produção ou ejeção do leite. Os parâmetros de produção de leite, a composição do leite (gordura, proteína e contagem de células somáticas), a persistência de lactação, a reprodução, os aspectos morfológicos foram avaliados durante 305 dias de lactação das fêmeas. Foi analisado ainda a genotipagem para beta-caseína A2 e, pela primeira vez, foram incluídas as avaliações genômicas das novilhas que participaram da prova, apresentando os valores das habilidades preditas de transmissão genômica (GPTA, do inglês Genomic Predicted Transmitting Ability) para leite aos 305 dias e para idade ao primeiro parto. Assim, essa análise proporciona uma melhor estimativa sobre o potencial genético de cada animal. São informações que subsidiam a tomada de decisão do criador com base em informações técnicas com maior confiabilidade. É por meio de animais avaliados que podemos influenciar a pecuária leiteira no Brasil e no Cerrado. Temos uma história de produção de leite, mas ainda muito aquém do nosso potencial. Diante de todas as informações provenientes de pesquisas e avaliações de campo desses testes zootécnicos, inferimos que o sistema de produção de leite a pasto com animais adaptados tem todo o espaço para crescer com sustentabilidade econômica e social
Virgin olive oil and health: summary of the III international conference on virgin olive oil and health consensus report, JAEN (Spain) 2018
The Mediterranean diet is considered as the foremost dietary regimen and its adoption is associated with the prevention of degenerative diseases and an extended longevity. The preeminent features of the Mediterranean diet have been agreed upon and the consumption of olive oil stands out as the most peculiar one. Indeed, the use of olive oil as the nearly exclusive dietary fat is what mostly characterizes the Mediterranean area. Plenty of epidemiological studies have correlated that the consumption of olive oil was associated with better overall health. Indeed, extra virgin olive oil contains (poly)phenolic compounds that are being actively investigated for their purported biological and pharma-nutritional properties. On 18 and 19 May 2018, several experts convened in Jaen (Spain) to discuss the most recent research on the benefits of olive oil and its components. We reported a summary of that meeting (reviewing several topics related to olive oil, not limited to health) and concluded that substantial evidence is accruing to support the widespread opinion that extra virgin olive oil should, indeed, be the fat of choice when it comes to human health and sustainable agronomy
Cultivar de soja BRS 325RR: descrição, comportamento e indicação para o cultivo nos Estados do Maranhão, Piauí e Tocantins.
Autoria: MONTALVÁN, A. [i.e. MONTALVÁN DEL ÁGUILA], R
A note on comonotonicity and positivity of the control components of decoupled quadratic FBSDE
In this small note we are concerned with the solution of Forward-Backward
Stochastic Differential Equations (FBSDE) with drivers that grow quadratically
in the control component (quadratic growth FBSDE or qgFBSDE). The main theorem
is a comparison result that allows comparing componentwise the signs of the
control processes of two different qgFBSDE. As a byproduct one obtains
conditions that allow establishing the positivity of the control process.Comment: accepted for publicatio
Charge separation relative to the reaction plane in Pb-Pb collisions at TeV
Measurements of charge dependent azimuthal correlations with the ALICE
detector at the LHC are reported for Pb-Pb collisions at TeV. Two- and three-particle charge-dependent azimuthal correlations in
the pseudo-rapidity range are presented as a function of the
collision centrality, particle separation in pseudo-rapidity, and transverse
momentum. A clear signal compatible with a charge-dependent separation relative
to the reaction plane is observed, which shows little or no collision energy
dependence when compared to measurements at RHIC energies. This provides a new
insight for understanding the nature of the charge dependent azimuthal
correlations observed at RHIC and LHC energies.Comment: 12 pages, 3 captioned figures, authors from page 2 to 6, published
version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/286
Multiplicity dependence of jet-like two-particle correlations in p-Pb collisions at = 5.02 TeV
Two-particle angular correlations between unidentified charged trigger and
associated particles are measured by the ALICE detector in p-Pb collisions at a
nucleon-nucleon centre-of-mass energy of 5.02 TeV. The transverse-momentum
range 0.7 5.0 GeV/ is examined,
to include correlations induced by jets originating from low
momen\-tum-transfer scatterings (minijets). The correlations expressed as
associated yield per trigger particle are obtained in the pseudorapidity range
. The near-side long-range pseudorapidity correlations observed in
high-multiplicity p-Pb collisions are subtracted from both near-side
short-range and away-side correlations in order to remove the non-jet-like
components. The yields in the jet-like peaks are found to be invariant with
event multiplicity with the exception of events with low multiplicity. This
invariance is consistent with the particles being produced via the incoherent
fragmentation of multiple parton--parton scatterings, while the yield related
to the previously observed ridge structures is not jet-related. The number of
uncorrelated sources of particle production is found to increase linearly with
multiplicity, suggesting no saturation of the number of multi-parton
interactions even in the highest multiplicity p-Pb collisions. Further, the
number scales in the intermediate multiplicity region with the number of binary
nucleon-nucleon collisions estimated with a Glauber Monte-Carlo simulation.Comment: 23 pages, 6 captioned figures, 1 table, authors from page 17,
published version, figures at
http://aliceinfo.cern.ch/ArtSubmission/node/161
Multi-particle azimuthal correlations in p-Pb and Pb-Pb collisions at the CERN Large Hadron Collider
Measurements of multi-particle azimuthal correlations (cumulants) for charged
particles in p-Pb and Pb-Pb collisions are presented. They help address the
question of whether there is evidence for global, flow-like, azimuthal
correlations in the p-Pb system. Comparisons are made to measurements from the
larger Pb-Pb system, where such evidence is established. In particular, the
second harmonic two-particle cumulants are found to decrease with multiplicity,
characteristic of a dominance of few-particle correlations in p-Pb collisions.
However, when a gap is placed to suppress such correlations,
the two-particle cumulants begin to rise at high-multiplicity, indicating the
presence of global azimuthal correlations. The Pb-Pb values are higher than the
p-Pb values at similar multiplicities. In both systems, the second harmonic
four-particle cumulants exhibit a transition from positive to negative values
when the multiplicity increases. The negative values allow for a measurement of
to be made, which is found to be higher in Pb-Pb collisions at
similar multiplicities. The second harmonic six-particle cumulants are also
found to be higher in Pb-Pb collisions. In Pb-Pb collisions, we generally find
which is indicative of a Bessel-Gaussian
function for the distribution. For very high-multiplicity Pb-Pb
collisions, we observe that the four- and six-particle cumulants become
consistent with 0. Finally, third harmonic two-particle cumulants in p-Pb and
Pb-Pb are measured. These are found to be similar for overlapping
multiplicities, when a gap is placed.Comment: 25 pages, 11 captioned figures, 3 tables, authors from page 20,
published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/87
Transverse sphericity of primary charged particles in minimum bias proton-proton collisions at , 2.76 and 7 TeV
Measurements of the sphericity of primary charged particles in minimum bias
proton--proton collisions at , 2.76 and 7 TeV with the ALICE
detector at the LHC are presented. The observable is linearized to be collinear
safe and is measured in the plane perpendicular to the beam direction using
primary charged tracks with GeV/c in . The
mean sphericity as a function of the charged particle multiplicity at
mid-rapidity () is reported for events with different
scales ("soft" and "hard") defined by the transverse momentum of the leading
particle. In addition, the mean charged particle transverse momentum versus
multiplicity is presented for the different event classes, and the sphericity
distributions in bins of multiplicity are presented. The data are compared with
calculations of standard Monte Carlo event generators. The transverse
sphericity is found to grow with multiplicity at all collision energies, with a
steeper rise at low , whereas the event generators show the
opposite tendency. The combined study of the sphericity and the mean with multiplicity indicates that most of the tested event generators
produce events with higher multiplicity by generating more back-to-back jets
resulting in decreased sphericity (and isotropy). The PYTHIA6 generator with
tune PERUGIA-2011 exhibits a noticeable improvement in describing the data,
compared to the other tested generators.Comment: 21 pages, 9 captioned figures, 3 tables, authors from page 16,
published version, figures from
http://aliceinfo.cern.ch/ArtSubmission/node/308
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