Caruaru, Brazil
Caruaru, Brazil

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da Rocha H.P.,M.Sc. em Engineering | Furtado D.A.,Bairro Universitario | do Nascimento J.W.B.,Bairro Universitario | Silva J.H.V.,Federal University of Paraiba
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2010

The aim of this work was to analyse the environmental effects on the productive performance of commercial broiler chickens, raised in two poultry houses located in the semiarid region of Paraiba during the summer months, with one of them covered by a ceramic roof and the other covered with a fibrous cement roof. There was no significant difference between the poultry houses (P > 0.05) for temperature and relative humidity of air, index of black globe temperature and humidity, thermal load of radiation and wind speed. Poultry houses provided during the times considered hotest during the day (10 a.m. to 4 p.m.), average values considered above the comfort zone, causing an uncomfortable situation for the animals, but did not influence the productive performance. The water temperature in both poultry houses was higher than recommended, but also did not affect the productive performance. The sound level inside the poultry house did not cause discomfort to the birds or to the workers.

Florencio I.M.,Bairro Universitario | Florentino E.R.,Bairro Universitario | da Silva F.L.H.,Federal University of Paraiba | Martins R.S.,Federal University of Paraiba | And 2 more authors.
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

Among the main sub-products of the dairy industry is the cheese whey, obtained after milk's casein precipitation. With the advancement of technology, the production of cheese passed from a traditional process to a manufacturing process where everyday thousands of liters of whey are produced. The fermentation of cheese whey with the purpose of producing ethanol can present itself as a technically feasible alternative, as well as besides reducing the pollution potential of this residue it can still generate a product with higher added value. Thus, the aim of this paper was to obtain ethanol, using the cheese whey "sort of curd cheese", deproteinized, as a substrate for the yeast Saccharomyces cerevisiae and the addition of sucrose. A statistical design was used and different inoculum concentrations and percentages of sucrose were studied. The best result was obtained by adding 100 g L-1 of sucrose and 6.0 g L-1 of inoculum into the whey getting a % conversion of substrate to ethanol of 76.14%.

Queiroz A.J.M.,Bairro Universitario | Dantas H.J.,Bairro Universitario | De Figueiredo R.M.F.,Bairro Universitario | Melo K.D.S.,Federal University of Campina Grande
Engenharia Agricola | Year: 2011

Dryers heated by solar energy have been constructed and used in drying whole and half jack fruit almonds. The samples were dried during the day in direct sun and in the conventional solar dryer prepared for this purpose. Another piece of equipment was built for reception and accumulation of sun energy in a body of water, which was used as a heat source for night drying. The drying with the sun energy was compared with artificial drying. The jack fruit almonds were dried whole, half, with pellicle and without it. The storage of solar energy in water was technically viable for use in night drying. The drying by combining solar dryers in the day and night periods were completed in approximately 35 hours, and were equivalent to artificial drying between 40°C and 70°C. Almond cut in half and the pellicle removed reduced the drying time.

Reis L.S.,CECA | de Azevedo C.A.V.,Bairro Universitario | Albuquerque A.W.,CECA | Junior J.F.S.,São Paulo State University
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

The tomato cultivation in the greenhouse has been expanded in the last years, mainly, in the South and Southeast regions of Brazil, whose purpose is to improve the productivity and the quality of the agricultural products, offering regularity in the production. The present study aimed to determine, along the crop cycle, the relationship between the leaf area index and the productivity, and at the end of the cycle, the components of production of the tomato in the greenhouse. The models were generated through polynomial equations of 1st and 2nd order, having as independent variable the number of days after the transplanting. It was verified that it is possible to determine, in the greenhouse, through mathematical models, the leaf area index of the tomato crop considering the days after the transplanting. Basing on values of leaf area index, the productivity of the crop and the period of the maximum productivity can be determined, aiding the farmers to determine the best sowing and transplanting time of the tomato crop.

de Lisboa C.G.C.,CVTEC | de Figueiredo R.M.F.,Bairro Universitario | Queiroz A.J.M.,Bairro Universitario
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2012

The stability of the prickly pear power packed in laminated roll for 100 days storage under controlled temperature and relative humidity was evaluated. The material was evaluated every 20 days, through the moisture content, water activity, total acidity, sugars and color (brightness, red and yellow colour intensity). It was found during storage of powder samples, that the laminated packaging did not prevent the water absorption, while water activity increased and reduced sugars decreased with time, the total acidity decreased in the first twenty days, keeping stable thereafter in all samples and there was a darkening of the powder samples stored at 40 °C.

Nobrega L.M.,State University of Paraíba | Cavalcante G.M.S.,Federal University of Minas Gerais | Lima M.M.S.M.,State University of Paraíba | Madruga R.C.R.,State University of Paraíba | And 2 more authors.
American Journal of Emergency Medicine | Year: 2014

Background The aim of this study was to determine the prevalence of facial trauma among victims of road traffic accidents and investigate factors associated with it.Methods A cross-sectional study was carried out using the medical and dental charts of 2570 victims of road traffic accidents with bodily and/or facial injuries between 2008 and 2011. Sociodemographic variables of the victims and characteristics of the accidents and injuries were evaluated. Statistical analyses included the χ2 test as well as the Poisson univariate and multivariate regression analyses for the determination of the final hierarchical model.Results The prevalence of facial injuries was 16.4%. Most of the victims were male. Among the victims with facial injuries, 44.3% had polytrauma to the face. The prevalence of facial injuries was high among accidents that occurred at night (Prevalence Ratio (PR), 1.42; 95% confidence interval [CI], 1.10-1.84; P =.007) and victims up to 9 years of age (PR, 2.31; 95% CI, 1.03-5.17; P =.041). Moreover, the prevalence of facial injuries was lower among victims of motorcycle accidents than victims of automobile accidents (PR, 0.59; 95% CI, 0.44-0.89; P =.001).Conclusion The prevalence of facial injuries was high in this study and was significantly associated with the place of residence, time of day, age group, and type of accident. © 2014 Elsevier Inc. All rights reserved.

Barreto A.N.,Embrapa Algodao | do Nascimento J.J.V.R.,DAIC IFPE | de Medeiros E.P.,Embrapa Algodao | da Nobrega J.A.,Bairro Universitario | Bezerra J.R.C.,Embrapa Algodao
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013

Agricultural use of wastewater is an alternative to increase water availability, especially in semiarid regions. However, it may cause undesirable chemical changes in the soil. The aim of this study was to evaluate the influence of wastewater irrigation and castor bean (Ricinus communis L.) cultivation on the chemical attributes of a Fluvic Neosol. The experimental design was in a randomized block, in split-plot scheme, where the main plots were represented by the treatments of irrigation water and castor bean cultivation, and the subplots were the soil layers, with three replications. The treatments were T1 - wastewater irrigation + castor bean cultivation; T2 - mixture of supply water and wastewater (1:1 ratio) + castor bean cultivation; T3 - supply water irrigation + castor bean cultivation; and T4 - wastewater application, without castor bean cultivation. The depths of soil layers were 0-10, 10-20, 20-30, 30-40, and 40-50 cm. At the end of study, the content of phosphorus, calcium, potassium, and organic matter increased mainly in the upper layers, and sodium increased in the deeper layers in the wastewater treatments, in comparison to the supply water irrigation. In T4, the disposal of wastewater increased the concentration of magnesium. The pH values, iron and zinc concentration did not statistically differ in the treatments.

Bezerra M.V.C.,Bairro Universitario | da Silva B.B.,Bairro Universitario | Bezerra B.G.,Bairro Universitario
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2011

The albedo is an important element in studies related to radiation and energy balances. Consequently, changes in different biomes bring major implications for human and animal comfort. Accordingly, the monitoring of the albedo by orbital images enables to identify the anthropic influence of large areas and their environmental impact. This work was developed with the objective of assessing the impact of atmospheric correction at surface albedo and the NDVI using the traditional method of SEBAL (Bastiaanssen, 2000) and atmospheric correction band to band (Allen et al., 2007b) for four Landsat 5 - TM images covering Cariri mesoregion of Ceará State. The results showed decrease in the surface albedo and increase in NDVI, corrected for atmospheric effects for all sample areas. According with Student test there was significant difference between the albedo and NDVI under the two methods, significant at 0.01 level.

The carboxymethylcellulose (CMC) is a linear anionic polymer used as viscosifier agent and filtrate reducer in drilling fluids. The chemical structure and molecular weight of the polymer interfere in the complex interactions between the polymeric chains and the mineral solids in the suspension. This study aimed to evaluate the rheological behavior and filtration process of clay suspensions in function of the increase of the polymeric additive concentration with different molar masses. For this, a sample of bentonite clay, two samples of CMC with different molecular weight (CMC 1 (9.0 x 104 g/mol) and CMC 2 (2.5 x 105 g/mol)) and same degree of substitution (0.7) and one sample of calcite were used. The rheological properties (apparent viscosity, plastic viscosity, yield limit and gel strength, and filtration process parameters (filtrate volume, spurt loss, cake thickness and permeability, and retaining power of the clay suspensions were determined. The rheological and filtration properties of the clay suspensions prepared with polymeric additives are strongly dependent of the CMC-clay interactions and CMC-calcite and these are dependent on the viscosity grade and chain size of the polymer.

PubMed | Bairro Universitario
Type: Journal Article | Journal: Medicina oral, patologia oral y cirugia bucal | Year: 2016

Jaw pseudocysts are benign osseous lesions of unclear etiology. Among these, the simple bone cyst (SBC) and aneurysmal bone cyst (ABC) are intriguing bone pathologies still rarely studied together. This retrospective study aimed to present the long-term case series of patients with jaw pseudocysts focusing on the clinical, radiographic, and transoperative aspects.A retrospective case series of patients with SBC and ABC was performed. Clinical, radiographic, and transoperative aspects of both pseudocysts were reviewed from the histopathological archives of 20,469 cases between 1959-2012. All descriptive data were summarized.Of 354 (15.25%) bone pathologies, 54 cases of jaw pseudocysts were found, with 42 (11.86%) SBC and 12 (3.39%) ABC cases. For both lesions, most of the sample were young Caucasian women with an asymptomatic posterior mandible lesion with undetermined time of evolution and none trauma history. A unique radiolucent scalloped lesion presenting an empty cavity were also observed for both conditions. However, some atypical findings were found for SBC including: the expansion of bone cortical, tooth resorption, displacement of the mandibular canal, and recurrence. The absence of painful symptoms and the lack of classical blood-filled cavity were observed in some cases of ABC.The SBC and ABC are bone pathologies with few retrospective studies, no previous studies on the two conditions, varied nomenclature, and atypical aspects in some cases. Therefore, the knowledge of clinical, imaging, and transoperative features of such pseudocysts are clinically valuable as diagnosis hypothesis of radiolucent lesions of the jaws.

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