de Souza P.T.,State University of Ceara |
Salles M.G.F.,Rural University |
da Costa A.N.L.,University Federal do Cariri |
de Souza L.P.,Sao Paulo State University |
And 2 more authors.
International Journal of Biometeorology | Year: 2013
The aim of this work was to determine the adaptability of Saanen and 1/2Saanen × 1/2Anglo-Nubian (1/2S1/2AN) goats bred in tropical climates. The study included 30 goats, 15 Saanen and 15 1/2S1/2AN. The data was collected during the rainy and dry seasons. During the whole experimental period, the environment variables were recorded, as well as rectal temperature (RT), superficial temperature (ST), respiratory rate (RR) and heart rate (HR) and milk production (MP). The adaptability coefficient (AC) was calculated for both genotypes. The averages were evaluated by ANOVA at 5 % probability. There was a genotype and period of year effect, as well as the interaction genotype × period of year. Pearson's simple correlation analysis was then carried out between milk production and physiological and environment variables. There was a statistical difference (p < 0.05) between the seasons for RT, ST and RR. RT, RR and HR were lower for 1/2S1/2AN than Saanen goats, regardless of the season. MP was greater in the dry season (p < 0.05) (2.52 ± 0.50 kg/day for 1/2S1/2AN and 2.41 ± 0.38 kg/day for Saanen) than the rainy season (2.17 ± 0.27 kg/day for 1/2S1/2AN and 2.28 ± 0.53 kg/day for Saanen). The MP correlations were very significant (p < 0.05), however low and negative, where it was higher when correlated with RR in Saanen goats. Under the conditions of the present study, it is concluded that the goats were influenced by climatic factors, where the rainy period was more likely to cause thermal stress in the animals. © 2013 ISB.
Evaluation of catalytic systems based on CuO/CeO2 in the reaction of preferential oxidation of CO:H2 production under H2 [Avaliação de sistemas catalíticos à base de CuO/CeO2 na reação de oxidação preferencial do CO em presença de H2]
Neiva L.S.,University Federal do Cariri |
Bonifacio M.A.,Federal University of Campina Grande |
Andrade H.M.C.,Federal University of Bahia |
Gama L.,Federal University of Campina Grande
Ceramica | Year: 2015
The preferential CO oxidation (PROX) is the most suitable for the purification of gas streams rich in H2 method. Catalysts CuO/CeO2 have been developed and presented in the literature as a promising alternative for the reaction preferential oxidation of CO - CO-PROX. The objective of this work is to synthesize catalysts based on CuO/CeO2 via Pechini synthesis method, characterize and analyze their structures and evaluate the catalytic performance of these materials used in CO-PROX reaction. Two samples of catalysts were developed based on CuO/CeO2, containing 0.1 mol and one containing 0.5 mole of CuO. Both synthesized samples proved suitable for use in processes of conversion of CO to CO2. However, the sample containing 0.1 mol CuO was catalytically more active than the sample containing 0.5 mol of the same active species. © 2015, Associacao Brasileira de Ceramica. All rights reserved.
Oliveira M.P.,University Federal do Cariri |
Lima P.M.A.,Federal University of Pernambuco |
Da Silva H.J.,Federal University of Pernambuco |
De Mello R.J.V.,Federal University of Pernambuco
Acta Ortopedica Brasileira | Year: 2014
To identify, through a systematic literature review, the characteristics of neoplasm seeding in biopsy performed on the musculoskeletal system. We performed a search on PubMed, MEDLINE, LILACS and SciELO from August to October 2010. We included articles that addressed the neoplasm seeding in biopsy performed on the musculoskeletal system. The search was limited to English, Spanish and Portuguese as publication languages, but it was not limited by year of publication. We retrieved 2858 articles, but only seven were selected based on inclusion and exclusion criteria. Other four papers were found in the references of selected articles, totalizing 11 articles that were used to perform this systematic review. Issues may be raised in the literature: age and gender don't seem to influence the occurrence of neoplasm seeding; without resection of the biopsy tract, the possibility of local recurrence is very real; the influence of the type of tumor in the occurrence of neoplasm seeding is uncertain; it is impossible to conclude whether the closed biopsy technique has a lower chance of neoplasm seeding; it is likely that adjuvant chemotherapy has a protective effect against neoplasm seeding; an unfavorable prognosis is expected according to neoplasm seeding results.
De Lima L.L.,Federal University of Ceara |
Girao F.,Federal University of Ceara |
Lozorio W.,University da Integracao da Lusofonia Afro Brasileira |
Silva J.,University Federal do Cariri
Classical and Quantum Gravity | Year: 2016
We use the inverse mean curvature flow to establish Penrose-type inequalities for time-symmetric EinsteinMaxwell initial data sets which can be suitably embedded as a hypersurface in Euclidean space Rn+1, n ≥ 3. In particular, we prove a positive mass theorem for this class of charged black holes. As an application, we show that the conjectured upper bound for the area in terms of the mass and the charge, which in dimension n=3 is relevant in connection with the cosmic censorship conjecture, always holds under the natural assumption that the horizon is stable as a minimal hypersurface. © 2016 IOP Publishing Ltd.
Development and mycorrhizal colonisation in embauba seedlings fertilised with natural phosphates and organic material [Desenvolvimento e colonização micorrízica em mudas de embaúba adubadas com fosfato natural e material orgânico]
Da Silva E.P.,Federal University of Ceara |
Gomes V.F.F.,Federal University of Ceara |
Filho P.F.M.,Federal University of Ceara |
Da Silva Junior J.M.T.,Federal University of Ceara |
Ness R.L.L.,University Federal do Cariri
Revista Ciencia Agronomica | Year: 2016
Known locally as embauba, Cecropia pachystachya Trécul is a rustic, pioneer species with fast growth, ideal for cultivation in soils of low fertility, which explains its dependence on arbuscular mycorrhizal fungi (AMF). The symbiosis of this plant with AMF increases its efficiency in absorbing nutrients from the soil solution, especially those of low mobility such as phosphorus, which makes it possible to use phosphate fertilisers of low solubility in the production of seedlings. To evaluate this possibility, work was carried out in a greenhouse for 120 days, where natural rock phosphate was tested at five doses of P (0, 75, 150, 300 and 600 mg L-1) for colonisation by AMF. Also tested was the development of embauba seedlings grown in a substrate comprising natural soil (SN), natural soil with 50% (v/v) sterilised soil (SND), and natural soil with 25% (v/v) organic material (SNM). Evaluations were made of height, shoot dry weight production, stem diameter, levels of N, P, K, percentage mycorrhizal root colonisation, number of AMF spores in the substrate, soil basal respiration (RBS), microbial biomass carbon (CBM) and soil metabolic quotient (qCO2). Growth, stem diameter and shoot dry matter in the embauba were not benefitted by the substrates or the levels of P. However, root mycorrhizal colonisation, sporulation, RBS, CBM and qCO2 were affected by the phosphorus and organic fertilisers added to the soil.