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Search Results: 1 - 10 of 14554 matches for " émerson Mendes Soares "
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Productivity and Grazing Behavior of Ewes with Single or Twin Lambs Raised in Mixed Italian Ryegrass/White Clover Pasture in Southern Brazil  [PDF]
Felipe Jochims, Cleber Cassol Pires, Malcolm J. Gibb, Eduardo Bohrer de Azevedo, Diego Bitencourt de David, émerson Mendes Soares
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.57109
Abstract:

The aim of this study was to compare the area production and grazing behavior of single- and twin-rearing ewes kept on a mixed Italian ryegrass/white clover pasture. The herbage allowance was maintained at 12 kg DM/100kg live weight during the experiment, by continuous variable stocking management for 112 days (4 periods of 28 days). We measure the live weight gains, the area production and the body condition score of ewes and lambs. Animal behavior was observed on four occasions during which we evaluated whether the lambs were grazing near to or far from their mother. Live-weight output from the ewes and lambs, and net output (ewes and lambs) were calculated. Results showed that being irrespective of birth type, ewes had similar mean daily weight gains, although ewes with twin lambs presented a mean lower body condition score. Ewes live weight output/ha did not differ significantly among birth types, but twin lambs produced 98.2 kg (45%) more live weight gain/ha. Total net live-weight output (ewes + lambs) was 121.5 kg greater for twins than for singles. Ewes with twin lambs spent more time grazing and ruminating. Lambs increased the time they spent grazing in each successive period. Single lambs spent significantly longer time grazing within 12 m of their dams (near grazing). Analysis of far grazing times by the broken line method showed that growing lambs rapidly increase the time spent far grazing up to a live weight of 20.3 kg in both birth types, which occurs at 95.3 and 115.9 days of age for single and twins, respectively. The results indicate that twin lambs are more productive than singles, when evaluated per area unit of pasture.

Sward Structural Characteristics and Performance of Beef Heifers Reared under Rotational Grazing Management on Campos Grassland  [PDF]
Cezar Wancura Barbieri, Fernando Luiz F. de Quadros, Felipe Jochims, émerson Mendes Soares, Leandro Bittencourt de Oliveira, Régis Maximiliano R. Carvalho, Gabriela Machado Dutra, Felipe Xavier de Lima, Franciele Gusatto
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.57114
Abstract:

This study aimed to evaluate the effect of two rest intervals on structural sward characteristics and productive performance of beef heifers reared on Campos grassland managed on rotational grazing. The treatments were two intervals between grazing of 375 and 750 DD (degree days), based on thermal cumulative sum for leaf expansion of native grasses belonging to two functional groups. The experimental design was a randomized complete block design with two treatments and three replications. The tested animals were beef heifers with initial age of 12 months and average weight of 185.2 ± 17.4 kg. Measures in the pasture were: herbage mass, mass of green leaf blades, stem mass, dead material mass and green leaf allowance. The 750 DD rest interval presented higher herbage mass (24%), higher green herbage mass and 19% more leaves in the canopy. This rest interval also presents a high proportion of dead material and stems in the sward structure. In the other way, the 375 DD rest interval presents better chemical characteristics, with 20% more crude protein in the hand plucking samples. Heifers’ dry matter intake was similar between the rest intervals (2.04% of live weight) and the bite mass was also similar (0.22 g DM per bite) but the animal performance was higher in the 375 DD rest interval. The stocking density showed similarity between treatments with an average of 875 kg/LW/ha. The live weight gain per area was higher in 40 kg/LW/ha (P = 0.117) for 375 DD rest interval, reaching 251 kg/LW/ha produced over the 149 experimental days. Based on these results, we can conclude that the treatment of shortest interval between defoliation gave the highest gain individual

Optical Microscopy as a Tool to Correlate Morphology and Thermal Properties of Extruded PET/PC Reactive Blends  [PDF]
Luis Claudio Mendes, Patricia Soares da Costa Pereira
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.28140
Abstract: Catalysed and uncatalysed reactive extruded poly(ethylene terephthalate)/poly(bisphenol-A carbonate) (PET/PC) blends phase structure at compositional range containing 0-100 wt% of both parent polymers were evaluated. Phase separation was supported by TG/DTG, DMA and DSC. The changes on Tg and Tm of the parent polymers were associated to the esterification and transesterification reactions inside the phases and into the interfacial region. According to optical observations, not yet published in this matter, the blend morphology was dictated, either composition or melt flow rate and in the whole composition range, a matrix-droplet morphology was noticed. PET was only able to be crystallized in blends in which it was the matrix. Mostly, the PET/PC blends revealed to be partially miscible systems in which the level of the transesterification/esterification reactions was driven by the kind of matrix. The latter showed great influence on the thermal properties.
Molecular Alterations in Sporadic Primary Hyperparathyroidism
Maria Inês Alvelos,Maria Mendes,Paula Soares
Genetics Research International , 2011, DOI: 10.4061/2011/275802
Abstract: Primary hyperparathyroidism (PHPT) is a frequent endocrine disorder characterized by an excessive autonomous production and release of parathyroid hormone (PTH) by the parathyroid glands. This endocrinopathy may result from the development of a benign lesion (adenoma or hyperplasia) or from a carcinoma. Most of the PHPT cases occur sporadically; however, approximately 10% of the patients present a familial form of the disease. The molecular mechanisms underlying the pathogenesis of sporadic PHPT are incompletely understood, even though somatic alterations in MEN1 gene and CCND1 protein overexpression are frequently observed. The MEN1 gene is mutated in about 30% of the parathyroid tumours and the protooncogene CCND1 is implicated in parathyroid neoplasia by rearrangements, leading to an overexpression of CCND1 protein in parathyroid cells. The aim of this work is to briefly update the molecular alterations underlying sporadic primary hyperparathyroidism. 1. Introduction One of the multiple implications of multicellularity is that all parts of a body must be able to communicate with each other, in order to maintain homeostasis. The communication between different parts of an organism is essential for an appropriate response to internal and external environmental stimuli. The endocrine system, through the production, and release of hormones, is a key element for the establishment and maintenance of such regulation [1]. The parathyroid glands are the endocrine organs responsible for regulating calcium levels by producing a hormone, the parathyroid hormone (PTH), released directly into the blood [2] that regulates calcium levels acting at various organs. Calcium plays a fundamental role in controlling the neuromuscular activity, the blood clotting process, bone structure, and integrity of cell signaling. The levels of ionized calcium in bloodstream are maintained by a complex hormonal mechanism, involving three main systems: gastrointestinal system, bone, and kidney [3, 4]. Primary hyperparathyroidism is a common endocrinopathy characterized by an inappropriate oversecretion of PTH. High PTH levels lead to a hypercalcemic state affecting different organs and systems such as bones and kidneys and cardiovascular, gastrointestinal, and nervous systems [5, 6]. The incidence of PHPT is estimated as 25 cases per 100?000 individuals, and the main risk factors are older age, female gender, and exposure to cervical irradiation [7, 8]. This pathological condition, in 80 to 85% of the cases, is due to a parathyroid adenoma (uniglandular disease), followed by 15 to 20%
Numerical modeling of the response of Ceará continental shelf waters to wind stress forcing
Soares, Jacyra;Castro Filho, Belmiro Mendes de;
Brazilian Journal of Oceanography , 1996, DOI: 10.1590/S1679-87591996000200004
Abstract: ceará shelf waters response to steady and transicnt wind forcing, from ponta cajuais (04°42's, 37°19.5'w) to ponta de itapagé (02°50.5's, 40000'w), was studied using a hydrodynamic numerical model. the finitc difference model was based upon the equations for a barotropic ocean in general form: advective and quadratic surface and bottom stress terms were included. seasonal differences in the shelf waters response were characterized by simulation of summer and winter forcing. such experiments wcre conducted for both f and equatorial beta plane domains, without significative differences in the results. transient shelf waters response were investigated using surface winds from the fortaleza airport , during the period extending from 14/03 to 25/03n9. model results were compared to current data collected during the same period; modeled currents were able to roughly describe observed current pattem, but not current intensity.
The quartz crystal microbalance: a tool for probing viscous/viscoelastic properties of thin films
Tenan, Mário Alberto;Soares, David Mendes;
Brazilian Journal of Physics , 1998, DOI: 10.1590/S0103-97331998000400015
Abstract: techniques based upon the electrical response of the quartz crystal microbalance (qcm) have been widely used in laboratories as a routine tools. in this article we present and discuss applications of the qcm (or its variant, the electrochemical quartz crystal microbalance, eqcm) to the viscoelastic characterization of films. it is pointed out that correlations between the motion of quartz crystal and contacting films and overlayers as well as the influence of the electronic circuit on the electric state of the whole system are of fundamental importance in interpreting the results.
The quartz crystal microbalance: a tool for probing viscous/viscoelastic properties of thin films
Tenan Mário Alberto,Soares David Mendes
Brazilian Journal of Physics , 1998,
Abstract: Techniques based upon the electrical response of the quartz crystal microbalance (QCM) have been widely used in laboratories as a routine tools. In this article we present and discuss applications of the QCM (or its variant, the electrochemical quartz crystal microbalance, EQCM) to the viscoelastic characterization of films. It is pointed out that correlations between the motion of quartz crystal and contacting films and overlayers as well as the influence of the electronic circuit on the electric state of the whole system are of fundamental importance in interpreting the results.
Teaching Intraverbal Storytelling to Children with Autism and Other Cases of Language Delays  [PDF]
Daniel Carvalho de Matos, Pollianna Galv?o Soares de Matos, Rosana Mendes éleres de Figueiredo
Psychology (PSYCH) , 2017, DOI: 10.4236/psych.2017.86051
Abstract: In Brazil, it is estimated that there are approximately 2 million youngsters and children diagnosed with autism and other cases of learning disabilities, a factor that has led to an increase on the demand for treatment aimed at the development of basic and academic skills, such as reading, writing, fluency in interpreting texts, recalling and retelling a story dictated by a teacher. The purpose of the present investigation was to assess the efficacy of a procedure to teach intraverbal storytelling to four Brazilian children (two autistic and two with language delays). Three stories were taught to each participant and each story comprised four segments represented by pictures and written scripts. The participants had opportunities to read the scripts with help from the experimenter if necessary and, after an interval, they had to retell the stories. During training, echoic and visual prompts were administered as corrections whenever a given child was unable to retell a given segment appropriately. Correct responses free from prompts resulted in praise and a token. After gathering a given number of tokens, the participants could exchange them for a preferred item like a toy or a favorite activity. As result, the participants were able to retell the stories correctly when compared to baseline levels. Only one was unable to retell all the segments of the third story, probably because she did not have more time to be exposed to the programming contingencies due to the period of recess from school. The results provide education professionals with specific directions for advocacy and service delivery that aim to enhance school outcomes for students with ASD.
Genetic and Phenotypic Parameters in the Selection of Upland Rice Genotypes  [PDF]
Camila Soares Cardoso da Silva, Flávia Barbosa Silva Botelho, Cinthia Souza Rodrigues, Marcela Pedroso Mendes, Amanda Mendes de Moura, Ant?nio Rosário Neto
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.813232
Abstract: To assist in upland rice breeding programs, estimated genetic and phenotypic parameters are extremely important in the selection of superior lines. Thus, the objective of this study was estimate the genetic and phenotypic parameters of upland rice lines of the breeding program of UFLA in partnership with Embrapa Arroz e Feijao and Epamig. The experiment was installed in an experimental area of the Department of Agriculture at UFLA. It was evaluated 36 upland rice lines of the preliminary trial of the 2014/15 season, in randomized blocks, with three replications and plots consisted of five rows and each row has four meters. For this, it was evaluated the characters: plant height (cm), yield (kg·ha-1), 100-grain weight, days until flowering, percentage of filled grains and rice blast severity. The variance analysis and genetic parameters were estimated using the software SAS. To evaluate the experimental precision was estimated the accuracy, which varied between 63% and 98%, showing experimental precision, moderate to high. The lines differed significantly for all characters, meaning there is genetic variability among genotypes evaluated. With intensity of selection of 10% of lines, it was obtained a genetic gain of 325.29 kg·ha-1 in the character productivity, a plant height (cm) reduction in 5.50 cm, and days until flowering, with a reduction of 9.23 days, with selection of earlier plants. The estimated values for heritability ranged from 38% - 96%. Estimates confirm the possible success with the selection of the upland rice lines for these characters.
Sobre a constitui??o da disciplina curricular de língua portuguesa
Pietri, émerson de;
Revista Brasileira de Educa??o , 2010, DOI: 10.1590/S1413-24782010000100005
Abstract: this paper considers a moment in the historical process of the constitution of portuguese as a curricular discipline in brazil. in the 70s of the twentieth century, changes were carried out in the structure of the educational system. the authorities responsible for the educational system produced documents to subsidize, theoretically and methodologically, the curricular changes proposed. discursive analysis of these documents reveals important characteristics about the modes of appropriation, with didactic objectives, of academic knowledge about language. the analysis also provides evidence that the referred moment is characterized by concurrent conceptions of knowledge, public policy and language teaching.
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