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Search Results: 1 - 10 of 742936 matches for " A. L. C.;Silva "
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Gastric Neoplasia during Anti-TNF Therapy for Crohn’s Disease: Casual Event?  [PDF]
F. M. L. Fortes, B. C. Silva, B. C. Silva, M. C. Lyra, A. M. Pimentel, G. O. Santana
Journal of Cancer Therapy (JCT) , 2015, DOI: 10.4236/jct.2015.68081
Abstract: The increase risk of cancer development in patients with inflammatory intestinal disease (IBD) has already studied for decades. The anti-TNF therapy has changed the treatment strategy of IBD. By using on a larger scale and for a longer time, the anti-TNF raised concern over its potential adverse events. A male Crohn’s disease (CD) patient, 55 years old, diagnosed for nine years, treated with infliximab for 6 years. In 2011, he underwent a nupper endoscopy (UE) which showed flat erosive gastritis with moderate intensity in antrum, gastric polyps and gastric erosion. Pathological examination revealed a chronic gastritis in erosive activity and search for Helicobacter pylori resulted positive. In May 2014, the patient was asymptomatic, when it held UE, which showed suggestive lesion of early gastric cancer, measuring 1.5 cm and search for Helicobacter pylori negative. Histopathological exams confirmed the adenocarcinoma. The patient underwent to a laparoscopic surgery (total gastrectomy with lymphadenectomy and reconstruction Roux-en-Y). Risk factors for the development of gastric cancer in general population are already well defined. However studying a possible association among CD and the different therapeutic modalities used in the treatment of this disease with gastric cancer appearance is important to set specific assessment strategies, prevention and follow-up. While there is no consensus on a proper monitoring for gastric cancer prevention in these patients, individualized conduct, taking into account individual characteristics, family record and other risk factors, should be adopted to avoid unfavorable outcomes in CD patients.
The Influence of a Goalkeeper as an Outfield Player on Defensive Subsystems in Futsal  [PDF]
Umberto C. Corrêa, Keith Davids, Silvia L. Silva, Renata A. Denardi, Go Tani
Advances in Physical Education (APE) , 2014, DOI: 10.4236/ape.2014.42012

The aim of this study was to investigate the influence of the goalkeeper as an outfield player on defensive subsystems in the team sport of futsal. For this purpose, all sequences of play involving the goalkeeper (n = 65), and the sequences without a goalkeeper (controls) (n = 11), were selected from digital video footage of a futsal competition, and analysed using TACTO software. The defensive area, attacker-defender distance, and interception distance were used to examine players’ coordination tendencies as a team in completion of successful and unsuccessful passes and shots. Results showed that each team reduced its defensive area as well as its variability in situations where the goalkeeper acted as an outfield player. This finding implies that it was an effective defensive strategy because it led to emergence of more unsuccessful passes. It was also observed that the goalkeeper acting as an outfield player was an effective strategy for attacking in terms of increasing shots at goal.

Irriga??o por gotejamento do tomateiro industrial durante o estádio de frutifica??o, na regi?o de Cerrado
Marouelli, Waldir A;Silva, Washington L C;
Horticultura Brasileira , 2006, DOI: 10.1590/S0102-05362006000300014
Abstract: the response of drip-irrigated processing tomatoes to irrigation frequencies, from 0.25 to 8 days, during fructification stage, was evaluated aiming to establish an irrigation criterion for the "cerrado" conditions of central brazil. the rate of fully-red tomato fruits at harvest increased linearly as irrigation interval increased, while biomass production and number of fruit per plant were linearly reduced. both marketable fruit yield and average fruits mass showed quadratic responses to treatments, reaching a maximum at irrigation interval of 0.8 day. plant final stand, plant water use efficiency, total soluble solids content, and fruit firmness were not affected by irrigation interval. rotten fruit rate featured negative linear correlation with irrigation interval, while the correlation for acidity was positive. for irrigation scheduling purposes based soil water status, the critical matric tension, related to the irrigation interval that maximized yield, was 10 kpa, evaluated at 20 cm depth.
Brazilian Journal of Aquatic Science and Technology , 2002,
Abstract: O objetivo deste trabalho foi avaliar a variabilidade intramareal e quantificar o transporte residual de nutrientes, Carbono Organico Particulado (COP) e Clorofila-a (Cla) no estuário do rio Camboriú, durante condi es de maré de sizígia e quadratura. Foram realizadas 2 campanhas de amostragem de 25 horas, cobrindo dois ciclos de maré em cada. Nas campanhas foram obtidos registros de velocidade de corrente e perfis verticais de salinidade e temperatura, bem como amostras de água (superfície e fundo). A varia o dos nutrientes foi maior na campanha realizada em condi es de meré de sizígia. Na quadratura, o estuário ficou sempre estratificado e apresentou menor varia o. Na sizígia o transporte resultou em exporta o de NID, PID, Si e COP, respectivamente iguais a -2.6x104, -0.9x103,-9.9x103 e -1.9x103 (mol/d) e importa o de Cla de 50 g/d. Na quadratura o transporte resultou em exporta o de NID, PID, Si, COP e Cla de, respectivamente, - 1.5x104, -0.35x103, -23x103, -4.4x103 (mol/d) e -2.0x103 g/d. As maiores transferências de Si e COP na quadratura podem estar associadas ao período mais chuvoso em que ela foi realizada. O menor transporte de NID e PID pode ser explicado pela sua adsor o ao material em suspens o e/ ou ao consumo pelo fitoplancton, no interior do estuário. Esta hipótese é apoiada pela exporta o de Cla nesta situa o. The purpose of this study was to evaluate the intratidal variability and to quantify the net transport of dissolved nutrients, particulate organic carbon (POC) and Chlorophyll a in the estuary of the Camboriú River during neap and spring tides. Two 25-hour continuous sampling surveys were carried out, covering two tidal cycles on each situation. On each survey, continuous records of direction and velocity of currents and vertical profiles of salinity and temperature were obtained, as well as samples of surface and botton water. The distribution of dissolved nutrients was determined by the tide during spring tide conditions and by the river discharge during neap tide conditions. In the spring tide the net transports of DIN, DIP, Si, POC and Chla-a through the estuary were -2.6x104, -0.9x103,-9.9x103 e -1.9x103 (mol/d) and 50 (g/d), respectively. In the neap tide, the net transports of DIN, DIP, Si, POC and Cla-a were -1.5x104, -0.35x103, -23x103, -4.4x103 (mol/d) e -2.0x103 g/d, respectively. The largest transfers of Si and POC in the neap tide may be associated to the rainy period in this situation. The smallest transport of DIN and DIP can be explained by its adsorption into the particulate material and by its biological
Transferring Few-Layer Graphene Sheets on Hexagonal Boron Nitride Substrates for Fabrication of Graphene Devices  [PDF]
J. A. Leon, N. C. Mamani, A. Rahim, L. E. Gomez, M. A. P. da Silva, G. M. Gusev
Graphene (Graphene) , 2014, DOI: 10.4236/graphene.2014.33005

We have developed a dry transfer method that allows graphene to be transferred from polymer- thyl-methacrylate (PMMA)/Si (silicon) substrates on commercially available hexagonal boron ni- tride (hBN) crystals. With this method we are able to fabricate graphene devices with little wrin- kles and bubbles in graphene sheets, but that do not degrade the electronic quality more than the SiO2 substrate does. For hBN to perform the function described above substrate cleanliness is critical to get high quality graphene devices. Using hBN as a substrate, graphene exhibits enhanced mobility, reduced carrier inhomogeneity, and reduced intrinsic doping compared to graphene on SiO2 substrate.

Effect of Ultrasound and Xylanase Treatment on the Physical-Mechanical Properties of Bleached Eucalyptus Kraft Pulp  [PDF]
Larisse A.R. Batalha, Juliana C. da Silva, Carolina M. Jardim, Rubens C. Oliveira, Jorge L. Colodette
Natural Resources (NR) , 2011, DOI: 10.4236/nr.2011.22017
Abstract: The modification on the fiber structure of bleached eucalyptus kraft pulp is a very attractive alternative for improve- ments in the properties of paper production. The enzymatic treatment by xylanases and ultrassonic treatments modify the characteristics of the fibers, has been reported. Therefore, the purpose of this study was to evaluate the influence of ultrasonic waves as a facilitator of the action of enzymes (hemicellulase) by modifying the physicochemical nature of fiber eucalyptus Kraft pulp, in order to improve the physical and mechanical properties of the paper. But it was observed the that idea of ultrasound acts as facilitator for action of enzymes can’t be affirmed, since in most properties XA-1 and XA-2 were equal statistically. It may be noted that the junction of ultrasound and xylanase provided improves on tensile index, specific elastic modulus and tensile energy absorption and a decrease of tear index on the mechanical properties of handsheet and it increased the opacity when the ultrasound was applied before xylanase.
Efeito da temperatura na síntese de óxidos hidratados de nióbio e zirc?nio e adsor??o de íons Ag+ e Pb2+
Peixoto, A. L. C.;Silva, G. L. J. P. da;Silva, M. L. C. P. da;
Ceramica , 2006, DOI: 10.1590/S0366-69132006000400006
Abstract: this work reports the digestion temperature effect of precipitating agent on the physical and chemical characteristics of nb2o5.nh2o and zro2.nh2o. the compounds were obtained by homogeneous solution precipitation method with thermal decomposition of (nh4)2co3 at 45 oc and 90 oc. the x-ray diffraction analysis showed crystalline materials with interlamelar space for both nb2o5.nh2o, whereas zro2.nh2o is amorphous. by thermal analysis a similar hydration grade was observed for all materials. the langmuir adsorption isotherms show that the materials prepared at 90 oc, in both cases, have the best results.
Desenvolvimento de plantas, produ??o e qualidade de bulbos de alho sob condi??es de deficiência de água no solo
Marouelli, Waldir A.;Silva, Washington L. C.;Moretti, Celso L.;
Horticultura Brasileira , 2002, DOI: 10.1590/S0102-05362002000300014
Abstract: the experiment was carried out at embrapa hortali?as, brasília, brazil, aiming to evaluate the response of garlic plants to different water regimes in the soil at two development stages. treatments, arranged in a factorial scheme 4 x 4, resulted from the combination of four water tensions in the vegetative stage (20; 40; 80; and 160 kpa) and four in the bulbfication (20; 40; 80; and 160 kpa). plants submitted to soil water deficits in any crop stage had the vegetative growth, marketable yield, bulb size, and water use efficiency reduced up to 70%, 63%, 31%, and 57%, respectively. plant vegetative growth and bulb yield were negatively affected even for moderate water deficit in the soil (40 kpa).the number of bulbs per unit of area was linearly reduced only when the plants were submitted to water deficits in the vegetative stage. percentage of dry and secondary bulb growth, and bulb weight losses were not statistically affected by tensions between 20 and 160 kpa.
Estudo da adsor??o de íons fosfato em matriz inorganica
Rodrigues, L. A.;Silva, M. L. C. P. da;
Ceramica , 2008, DOI: 10.1590/S0366-69132008000100013
Abstract: this work reports the preparation, characterization and adsorption study of phosphate on hydrous tungsten oxides prepared by acid lixiviation of sodium tungstate. part of this material (s1) was heated at 100 °c resulting in a material with differentiated characteristics (s1/d). the materials prepared were characterized by x-ray diffraction, thermal analysis, scanning electron microscopy and energy dispersive spectroscopy. through the q0 constant, related with the capacity of maximum adsorption, it was observed that the s1 sample presented better adsorption capacity than the s1/d. the dg values show that po4-3 had been adsorbed through favorable reactions for all range of studied concentration.
Desenvolvimento de plantas, produ o e qualidade de bulbos de alho sob condi es de deficiência de água no solo
Marouelli Waldir A.,Silva Washington L. C.,Moretti Celso L.
Horticultura Brasileira , 2002,
Abstract: Avaliou-se o comportamento de plantas de alho submetidas a diferentes níveis de água no solo, em dois estádio de desenvolvimento. O experimento foi conduzido na Embrapa Hortali as, Brasília, DF. Os tratamentos, dispostos em esquema fatorial 4 x 4, resultaram da combina o de quatro tens es de água no solo no estádio vegetativo (20; 40; 80 e 160 kPa) e quatro no de bulbifica o (20; 40; 80 e 160 kPa). Plantas submetidas à deficiência hídrica, em qualquer dos estádios, tiveram o desenvolvimento, a produtividade comercial, o tamanho médio de bulbos e a eficiência do uso de água reduzidos em até 70%, 63%, 31% e 57%, respectivamente. O crescimento de plantas e a produtividade de bulbos foram negativamente afetados mesmo para condi es de deficiência moderada de água no solo (40 kPa). O número de bulbos por unidade de área foi reduzido linearmente apenas quando as plantas foram submetidas à deficiência hídrica no estádio vegetativo. As percentagens de bulbos pseudoperfilhados, de chochos e de perda de massa de bulbos n o foram afetadas significativamente por tens es entre 20 e 160 kPa.
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