EFEITO DE NÍVEIS DE FÓSFORO NÃO-FÍTICO E DE FITASE SOBRE A TÍBIA DE FRANGOS DE CORTE

It was evaluated the effect of nonphytate phosphorus (NNP) and phytase on broiler tibia.One thousand and two hundred chicks were allocated in a completely randomized designand factorial arrangement 4 x 3 (NPP x phytase levels), with four replicates. NPP levels, ateach phase, were 0.45, 0.37, 0.29 and 0.21% - initial, 0.41, 0.33, 0.25 and 0.17% - growth,and 0.37, 0.29, 0.21 and 0.13% - withdrawal. Phytase levels were 0, 500 and 1000 FTU/kgof diet. There was no effect on diameter at 21 days of age. Tibia with lower weight, lengthand diaphysis, distal epiphysis and average densities e proximal epiphysis density resultedfrom NPP reduction from 0.37 to 0.29% and from 0.29 to 0.21%, respectively. Inclusion of500 FTU/kg of phytase improved length and diaphysis density of the tibia, independent ofNPP levels. Diets with NPP, at initial, growth and final phases, of 0.37, 0.33 and 0.29%,respectively, supplemented with 1000 FTU/kg of phytase, can be used with no negativeeffect on bone quality in broilers.Avaliou-se o efeito de níveis de fósforo não-fítico (FNF) e fitase sobre a morfometria e adensidade de tíbia de frangos. Foram utilizadas 1200 aves em delineamento inteiramentecasualizado em arranjo fatorial 4 x 3 (níveis de FNF x níveis de fitase), com quatrorepetições. Os níveis de FNF, em cada fase, foram 0,45; 0,37; 0,29 e 0,21% na faseinicial; 0,41; 0,33; 0,25 e 0,17% na de crescimento e 0,37; 0,29; 0,21 e 0,13% na final. Osníveis de fitase foram 0, 500 e 1000 UFT/kg de ração. Não houve efeito sobre diâmetrodas tíbias aos 21 dias. Tíbias com menor peso, comprimento e densidade de diáfise,epífise distal e média, e densidade de epífise proximal resultaram da redução do FNF de0,37 para 0,29% e de 0,29 para 0,21%, respectivamente. A inclusão de 500 UFT/kg deração melhorou o comprimento e a densidade da diáfise das tíbias, independente dosníveis de FNF. Pode-se adotar dieta FNF nas fases inicial, crescimento e final de 0,37,0,33 e 0,29%, respectivamente, suplementadas com 1000 UFT/kg de ração, de um a 42dias, sem comprometer a qualidade óssea

Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements