1,833 research outputs found
Interação palma forrageira Opntia FÃcus-Indica Mill e Napolea Cochenillifera Salmdyck x Coconilha de escama Diaspis Enchinocati x Joaninha Chilocorus Nigrita Fabricius.
Phase diagram of a random-anisotropy mixed-spin Ising model
We investigate the phase diagram of a mixed spin-1/2--spin-1 Ising system in
the presence of quenched disordered anisotropy. We carry out a mean-field and a
standard self-consistent Bethe--Peierls calculation. Depending on the amount of
disorder, there appear novel transition lines and multicritical points. Also,
we report some connections with a percolation problem and an exact result in
one dimension.Comment: 8 pages, 4 figures, accepted for publication in Physical Review
Caracterização qualitativa de frutos em acessos de Cucurbita spp. no Vale do São Francisco.
O presente trabalho teve como objetivo, caracterizar qualitativamente os acessos de Cucurbita maxima e de C. moschata do Banco Ativo de Germoplasma de Cucurbit·ceas, pertencente a Embrapa Semi-árido
Development and use of a new medium to detect yeasts of the genera Dekkera/Brettanomyces
Aims: The objectives of this work were to develop a selective and/or differential medium able
to effciently recover Dekkera/Brettanomyces sp. from wine-related environments and to
determine the relationship between these yeasts and the 4-ethylphenol content in a wide range
of wines.
Methods and Results: The selectivity of the developed medium was provided by the addition
of ethanol, as single carbon source, and cycloheximide. The inclusion of bromocresol green
evidenced acid-producing strains. The inclusion of p-coumaric acid, substrate for the
production of 4-ethylphenol, enabled the differentiation by smell of Dekkera/Brettanomyces sp.
from all other yeast species growing in the medium. The medium was used either by plating
after membrane filtration or by the Most Probable Number (MPN) technique. In 29 white and
88 red randomly collected wines, these yeasts were found only in red wines at levels up to
2500 MPN ml±1, but constituted less than 1% of the total microbial flora. In red wines, 84%
showed detectable amounts of 4-ethylphenol up to 4430 lg l±1 while 28% of the white wines
showed detectable levels up to 403 lg l±1.
Conclusions: The use of the medium proposed in this work evidenced the presence of low
relative populations of Dekkera/Brettanomyces sp. even in wines contaminated by fast-growing
yeasts and moulds.
Significance and Impact of the Study: Further ecological studies on Dekkera/Brettanomyces
sp. should take into account the use of highly specific culture media in order to establish
their true occurrence in natur
Optimal Controller Identification for multivariable non-minimum phase systems
This paper extends the formulation of a data-driven control method - the
Optimal Controller Identification (OCI) - to cope with non-minimum phase (NMP)
systems, without a priori knowledge of the NMP transmission zero, i.e. without
obtaining a prior model of the plant - as in any data-driven approach. The
method is based on the Model Reference paradigm, in which the desired
closed-loop performance is specified by means of a closed-loop transfer
function - the reference model. Considering a convenient parametrization of the
latter and a flexible performance criterion, it is possible to identify the NMP
transmission zeros of the plant along with the optimal controller parameters,
as it will be shown. Both diagonal and block-triangular reference model
structures are treated in detail. Simulation examples show the effectiveness of
the proposed approach
Same-Sign Taus Signatures of Maximally Flavor-Violating Scalars at the LHC
We explore single and double flavor-violating scalars (flavons) production at
the 13 and 14 TeV LHC in an effective field theory formulation where flavons
always change the flavor of Standard Model fermions. When those scalars couple
to mass, their flavor-changing couplings to top quarks and tau leptons are
favored. Focusing on the mass region below the top quark mass, we find
couplings that fit the muon and electron discrepancies and avoid
several current experimental constraints. We determine the potential of the LHC
to exclude or discover such a new physics scenario with clean signatures
consisting of same-sign tau leptons and the simultaneous observation of
resonances in the tau plus electron or muon invariant mass. We found that in
the double production mode, effective couplings down to order
TeV can be probed for flavon masses in the 10-170 GeV range at the
HL-LHC at 14 TeV, but couplings down to 0.1 TeV can be excluded at 95\%
confidence level with data collected by the 13 TeV LHC in the same mass
interval.Comment: 32 pages, 12 figures, 2 table
Caracterização da carcaça de cordeiros da região das Palmas no território do Alto Camaquã.
Eficácia de carrapaticidas em rebanhos leiteiros de Rondônia.
O carrapato dos bovinos, Rhipicephalus microplus é um dos principais problemas sanitários dos rebanhos leiteiros em Rondônia. As condições climáticas do Estado são propÃcias ao desenvolvimento biológico do carrapato, representando um desafio à pecuária leiteira, uma vez que os bovinos estão permanente expostos à infestação por carrapato. Esta publicação reúne informações a respeito do controle deste ácaro.bitstream/item/33600/1/ct113-carrapaticidas.pd
Comportamento de oviposição de mariposas do curuquerê em plantas de algodão com e sem caulim.
Recomendação de estirpes para leguminosas florestais-ano 2009.
O objetivo deste trabalho foi selecionar e recomendar estirpes de bactérias mais eficientes na FBN para espécies leguminosas florestais.bitstream/item/104079/1/Recomendacao-de-estirpe-para-leguminsa-florestal-2009-SERIE-DOC-264.pd
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