16,823 research outputs found
Espécies vegetais para cobertura do solo: influência sobre plantas daninhas e a produtividade do algodoeiro em sistema plantio direto
No full textEste trabalho objetivou avaliar a produção, a persistência e os efeitos de coberturas vegetais sobre as plantas daninhas e a produtividade do algodoeiro em sistema plantio direto. Os tratamentos consistiram das espécies de cobertura: milheto (Pennisetum glaucum (L.) R. Brown), Brachiaria ruziziensis Germain & Evrard, sorgo forrageiro (Sorghum bicolor L. Moench), capim-pé-de-galinha (Eleusine coracana L. Gaerth), Crotalaria juncea L., Crotalaria spectabilis Roth, aveia-preta (Avena strigosa Schreb.), nabo forrageiro (Raphanus sativus L.), P. glaucum + C. juncea, P. glaucum + C. spectabilis, B. ruziziensis + C. juncea, B. ruziziensis + C. spectabilis, S. bicolor + C. juncea, S. bicolor + C. spectabilis, E. coracana + C. juncea, E. coracana + C. spectabilis, A. strigosa + R. sativus, P. glaucum + R. sativus e pousio. As espécies foram semeadas no final do verão, após a colheita de soja, e o algodoeiro BRS 269-Buriti, nove meses após. O delineamento experimental foi em blocos ao acaso, com quatro repetições. As espécies B. ruziziensis, B. ruziziensis + C. juncea, B. ruziziensis + C. spectabilis e P. glaucum + R. sativus produziram mais de 6,8 t ha-1 de biomassa seca. A palhada produzida pela B. ruziziensis garantiu boa cobertura do solo durante o ciclo do algodoeiro. A biomassa seca de B. ruziziensis, B. ruziziensis + C. juncea e B. ruziziensis + C. spectabilis reduziu a infestação de plantas daninhas até a época de semeadura do algodão e durante os estádios iniciais de seu desenvolvimento. Palhas de R. sativus e A. strigosa, solteiras e consorciadas, interferiram negativamente na produtividade do algodoeiro
Measurement of the differential cross-section of B+ meson production in pp collisions at root s=7 TeV at ATLAS
No full textThe production cross-section of B+ mesons is measured as a function of transverse momentum p T and rapidity y in proton-proton collisions at centre-of-mass energy root s = 7 TeV, using 2.4 fb(-1) of data recorded with the ATLAS detector at the Large Hadron Collider. The differential production cross-sections, determined in the range 9 GeV < p(T) < 120 GeV and vertical bar y vertical bar < 2.25, are compared to next-to-leading-order theoretical predictions
Study of the B+c → J/ψD+s and B+c → J/ψD*s+ decays with the ATLAS detector
No full textThe decays B-c(+) -> J/psi D-s(+) and B-c(+) -> J/psi D-s*(+) are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb(-1) of pp collisions collected at centre-of-mass energies root s = 7 TeV and 8 TeV, respectively. Signal candidates are identified through J/psi -> mu(+)mu(-) and D-s(()*()+) -> phi pi(+)(gamma/pi(0)) decays. With a two-dimensional likelihood fit involving the B-c(+) reconstructed invariant mass and an angle between the mu(+) and D-s(+) candidate momenta in the muon pair rest frame, the yields of B-c(+) -> J/psi D-s(+) and B-c(+) -> J/psi D-s*(+), and the transverse polarisation fraction in B-c(+) -> J/psi D-s*(+) decay are measured. The transverse polarisation fraction is determined to be Gamma +/-+/-(B-c(+) -> J/psi D-s*(+))/Gamma(B-c(+) -> J/psi D-s*(+)) = 0.38 +/- 0.23 +/- 0.07, and the derived ratio of the branching fractions of the two modes is B-Bc+ -> J/psi D-s*+/B-Bc+ -> J/psi D-s(+) = 2.8(-0.8)(+1.2) +/- 0.3, where the first error is statistical and the second is systematic. Finally, a sample of B-c(+) -> J/psi pi(+) decays is used to derive the ratios of branching fractions B-Bc+ -> J/psi D-s*+/B-Bc+ -> J/psi pi(+) = 3.8 +/- 1.1 +/- 0.4 +/- 0.2 and B-Bc+ -> J/psi D-s*+/B-Bc+ -> J/psi pi(+) = 10.4 +/- 3.1 +/- 1.5 +/- 0.6, where the third error corresponds to the uncertainty of the branching fraction of D-s(+) -> phi(K+ K-)pi(+) decay. The available theoretical predictions are generally consistent with the measurement.ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-015-3743-8</p
Measurement of the relative B-c(+/-)/B-+/- production cross section with the ATLAS detector at root s=8 TeV
No full textThe total cross section and differential cross sections for the production of
B
±
c
mesons, times their branching fraction to
J
/
ψ
π
±
, are measured relative to those for the production of
B
±
mesons, times their branching fraction to
J
/
ψ
K
±
. The data used for this study correspond to an integrated luminosity of
20.3
fb
−
1
of
p
p
collisions recorded by the ATLAS detector at the Large Hadron Collider in 2012 at a center-of-mass energy of
√
s
=
8
TeV
. The measurement is performed differentially in bins of transverse momentum
p
T
for
13
GeV
<
p
T
(
B
±
c
)
<
22
GeV
and
p
T
(
B
±
c
)
>
22
GeV
and in bins of rapidity
y
for
|
y
|
<
0.75
and
0.75
<
|
y
|
<
2.3
. The relative cross section times branching fraction for the full range
p
T
>
13
GeV
and
|
y
|
<
2.3
is
(
0.34
±
0.0
4
stat
+
0.06
−
0.02
sys
±
0.0
1
lifetime
)
%
. The differential measurements suggest that the production cross section of the
B
±
c
decreases faster with
p
T
than the production cross section of the
B
±
, while no significant dependence on rapidity is observed
FIGURE 18 in Species relationships in the Neotropical genus Phareicranaus Roewer 1913 (Opiliones: Cranaidae): two new species and new data from Penial morphology
No full textFIGURE 18. Penis of Phareicranaus. P. roeweri, n. nov.: A, dorsal; B, lateral. P. spinulatus (Goodnight & Goodnight, 1943): C, dorsal; D, lateral. Scale bars = 0.1 mm.Published as part of Pinto-Da-Rocha, Ricardo & Bonaldo, Alexandre B., 2011, Species relationships in the Neotropical genus Phareicranaus Roewer 1913 (Opiliones: Cranaidae): two new species and new data from Penial morphology, pp. 1-34 in Zootaxa 3135 on page 26, DOI: 10.5281/zenodo.20784
Search for W ' -> t(b)over-bar in the lepton plus jets final state in proton-proton collisions at a centre-of-mass energy of root s=8 TeV with the ATLAS detector
No full textA search for new charged massive gauge bosons, called W', is performed with the ATLAS detector at the LHC, in proton-proton collisions at a centre-of-mass energy of root s = 8 TeV, using a dataset corresponding to an integrated luminosity of 20.3 fb(-1). This analysis searches for W' bosons in the W' -> t (b) over tilde decay channel in final states with electrons or muons, using a multivariate method based on boosted decision trees. The search covers masses between 0.5 and 3.0 TeV, for right-handed or left-handed W' bosons. No significant deviation from the Standard Model expectation is observed and limits are set on the W' -> t (b) over bar cross-section times branching ratio and on the W'-boson effective couplings as a function of the W'-boson mass using the CLs procedure. For a left-handed (right-handed) W' boson, masses below 1.70 (1.92) TeV are excluded at 95% confidence level.ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1016/j.physletb.2015.02.051</p
Search for a CP-odd Higgs boson decaying to Zh in pp collisions at root s=8 TeV with the ATLAS detector
No full textSee paper for full list of authors – 13 pages plus author list + cover pages (30 pages total), 5 figures, 2 tables, submitted to Phys. Lett. B, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-06/International audienceA search for a heavy, CP-odd Higgs boson, , decaying into a boson and a 125 GeV Higgs boson, , with the ATLAS detector at the LHC is presented. The search uses proton--proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3 fb. Decays of CP-even bosons to or pairs with the boson decaying to electron or muon pairs are considered, as well as decays with the boson decaying to neutrinos. No evidence for the production of an boson in these channels is found and the 95% confidence level upper limits derived for \sigma (gg\rightarrow A) \times \mbox{BR}(A \rightarrow Zh) \times \mbox{BR}(h \rightarrow f\bar{f}) are 0.098--0.013 pb for and 0.57--0.014 pb for in a range of 220--1000 GeV. The results are combined and interpreted in the context of two-Higgs doublet models
Intercambiabilidad entre equivalentes terapéuticos de lamotrigina en pacientes con epilepsia refractaria: riesgos y beneficios.
No full textINTRODUCTION: Epilepsy is a condition characterized by signs and symptoms of neurological disorder. Lamotrigine has been widely used, mainly due to their greater tolerability and lower rate of drug interactions with other antiepileptic drugs however the newest antiepileptic drugs have high cost to patient. In Brazil there are three different sort of pharmaceutical equivalents (reference, generic and similar), and the Brazilian health care authorities offers to users the possibility to receive them free of charge. Moreover these pharmaceutical equivalents can change during the treatment of epilepsy because this authorities buy the cheapest by public tender two or three times a year.
AIM: To evaluate the clinical and laboratory findings related to the most frequently used therapeutic equivalents of lamotrigine (reference drugs and similar products).
PATIENTS AND METHODS: Two similar formulations (A and B) and one reference (C) were tested in nine epileptic refractory patients. The study was divided into three periods of 42 days, one for each formulation, and medical data about the frequency of seizures, the occurrence of side effects and measurement of plasma concentrations of lamotrigine were collected.
RESULTS: The average number of seizures/week and plasma concentration of lamotrigine for formulations A, B and C were not statistically significant differences. Three patients during the use of the formulation C presented mild and transitory side effects.
CONCLUSION: Similar or reference drugs showed satisfactory results, however the interchangeability among the formulations raise the difficulty for the management of seizures in refractory epilepsy
FIGURE 7 in Revision of Fortipalpa Kasparyan & Ruíz-Cancino, (Ichneumonidae, Cryptinae)
No full textFIGURE 7. Fortipalpa heredia sp. nov. Holotype female. A, Dorsal view. B, Head, frontal. C, Propodeum, dorsal. D, Ovipositor tip, left side.Published as part of Supeleto, Fernanda A., Santos, Bernardo F. & Aguiar, Alexandre P., 2022, Revision of Fortipalpa Kasparyan & Ruíz-Cancino, (Ichneumonidae, Cryptinae), pp. 501-533 in Zootaxa 5219 (6) on page 514, DOI: 10.11646/zootaxa.5219.6.1, http://zenodo.org/record/743630
FIGURE 13 in Revision of Fortipalpa Kasparyan & Ruíz-Cancino, (Ichneumonidae, Cryptinae)
No full textFIGURE 13. Fortipalpa sacha sp. nov. Holotype female. A, Dorsal view. B, Head, frontal. C, Propodeum, dorsal. D, Ovipositor tip, left side.Published as part of Supeleto, Fernanda A., Santos, Bernardo F. & Aguiar, Alexandre P., 2022, Revision of Fortipalpa Kasparyan & Ruíz-Cancino, (Ichneumonidae, Cryptinae), pp. 501-533 in Zootaxa 5219 (6) on page 523, DOI: 10.11646/zootaxa.5219.6.1, http://zenodo.org/record/743630
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