19 research outputs found
Avaliação de uma equação de predição das exigências protéicas para aves reprodutoras pesadas na fase de produção
Efeito da temperatura ambiente e do sistema de criação sobre as exigências de energia metabolizável para mantença de aves reprodutoras pesadas
Effect of Protein and Energy Intake of Broiler Breeder Hens on Performance of Broiler Chicken Offspring
Effects of successful percutaneous coronary intervention of chronic total occlusions on myocardial perfusion and left ventricular function
Item does not contain fulltextAIMS: The aim of the present study was to investigate the effects of successful PCI CTO on absolute myocardial blood flow (MBF) and functional recovery. METHODS AND RESULTS: Patients with a documented CTO were prospectively examined for ischaemia and viability with [15O]H2O positron emission tomography (PET) and late gadolinium enhancement cardiac magnetic resonance imaging (LGE-CMR). Sixty-nine consecutive patients, in whom PCI was successful, underwent follow-up PET and CMR after approximately 12 weeks to evaluate potential improvement of MBF as well as systolic function. After PCI, stress MBF in the CTO area increased from 1.22+/-0.36 to 2.40+/-0.90 mL.min-1.g-1 (p<0.001), whilst stress MBF in the remote area also increased significantly between baseline and follow-up PET (2.58+/-0.68 to 2.77+/-0.77 mL.min-1.g-1, p=0.01). The ratio of stress MBF between CTO and remote area was 0.49+/-0.13 at baseline and increased to 0.87+/-0.24 at follow-up (p<0.001). The MBF defect size of the CTO area decreased from 5.12+/-1.69 to 1.91+/-1.75 myocardial segments after PCI (p<0.001). Left ventricular ejection fraction (LVEF) increased significantly (46.4+/-11.0 vs. 47.5+/-11.4%, p=0.01) at follow-up. CONCLUSIONS: The vast majority of CTO patients with documented ischaemia and viability showed significant improvement in stress MBF and a reduction of ischaemic burden after successful percutaneous revascularisation with only minimal effect on LVEF
Effect of dietary levels of methionine + cystine on performance of broiler breeders Efeito dos níveis dietéticos de metionina + cistina no desempenho de matrizes pesadas
The objective of this experiment was to evaluate levels of methionine + cystine levels for broiler breeders from 40 to 60 weeks of age. It was used 288 Cobb broiler breeders, distributed in a randomized experimental design with six levels of methionine+ cystine in the diets (0.39; 0.47; 0.55; 0.63; 0.71 and 0.79%), eight repetitions and six breeders per experimental unit. The diets were isocaloric and isoprotein (2,850 kcal ME/kg and 12.58% CP) and oferred at a fixed amount (155 g) per bird. For the entire studied period, by using polynomial analysis, it was observed a quadratic effect of methionine + cystine levels on the percentage of egg production, on number of eggs per hen housed, on number of eggs per hen and egg weight. There was also a linear effect on shell weight when it was calculated in relation to egg weight. The total methionine + cystine requirement for broiler breeders was calculated at 0.521% for percentage of egg production and number of eggs per hen, which corresponds to a daily intake of 808 mg of methionine + cystine/day. The digestible methionine + cystine requirement for broiler breeders was estimated at 727 mg for laying percentage and number of eggs per hen.<br>Com o objetivo de avaliar níveis de metionina + cistina para matrizes pesadas de 40 a 60 semanas de idade, conduziu-se um experimento com 288 matrizes da linhagem Cobb-500, distribuídas em delineamento inteiramente casualizado, com seis níveis de metionina + cistina nas dietas (0,39; 0,47; 0,55; 0,63; 0,71 e 0,79%), oito repetições e seis matrizes por unidade experimental. As rações foram isocalóricas e isoproteicas (2.850 kcal EM/kg e 12,58% PB) e fornecidas em quantidade fixa (155 g) por ave. No período total estudado, por meio de análise polinomial, foi observado efeito quadrático dos níveis de metionina + cistina sobre o percentual de produção de ovos, o número de ovos por ave alojada, o número de ovos por ave e o peso dos ovos. Houve também efeito linear sobre o peso da casca quando calculado em relação ao peso dos ovos. A exigência de metionina + cistina total para matrizes pesadas foi estimada em 0,521% para percentual de produção de ovos e número de ovos por ave, o que corresponde a uma ingestão diária de 808 mg de metionina + cistina total. A exigência de metionina + cistina digestível para matrizes pesadas é de 727 mg para percentual de postura e número de ovos por ave