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Search Results: 1 - 10 of 6062 matches for " Luciana Sanches "
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Interannual Variability of Energy Flux in Atmospheric Instability Conditions at Pantanal of Mato Grosso-Brazil  [PDF]
Leone Francisco Amorim Curado, José de Souza Nogueira, Luciana Sanches, Marcelo Sacardis Biudes, Thiago Rangel Rodrigues
Atmospheric and Climate Sciences (ACS) , 2012, DOI: 10.4236/acs.2012.24046
Abstract: The energy balance partitions in wetlands have gained notoriety due to the dynamics and importance of these areas for regional and local climate. Thus, the study was conducted about seasonal and interannual behavior energy fluxes, as well as the influences of the conditions of atmospheric stability and instability. The results showed highest fluxes happened in instability atmospheric conditions. The fluxes of latent and sensible heat showed seasonal variation, indicating that the water availability in the atmosphere has influence on the site energy partition, but the interannual patterns remained similar during the two years of study.
TRATAMIENTO DE AGUAS RESIDUALES DE LA INDUSTRIA LáCTEA EN SISTEMAS ANAEROBIOS TIPO UASB
ARANGO BEDOYA,OSCAR; SANCHES E SOUSA,LUCIANA;
Biotecnología en el Sector Agropecuario y Agroindustrial , 2009,
Abstract: due to its advantages over aerobic process in terms of higher degree of wastewater stabilization, lower microbial yield and nutrient requirement, no oxigen requirement and methane production, anaerobic digestion presents as a viable alternative for dairy industry wastewater treatment. in this investigation the performance and capacity of an upflow anaerobic blanket reactor (uasb) treating whey for the organic matter removal were evaluated. the uasb reactor was operated at a hydraulic retention time (hrt) of 1,3 d and organic loading rates ranging from 1.7 to 18.5 g cod/l.d. the maximum total chemical oxygen demand (cod) and total volatile solids (tvs) reduction was 98 and 97,2 % respectively occurred at the loading rates of 9.6 g cod/l.d. the cod removal efficiency was reduced to 77% when the organic loading rate was increasing to 18,6 g cod/l.d. the maximum anaerobic methane generation for the cheese whey studied was found to be 0,27 l ch4/g cod influent and the biogas methane content was 56%. based on these results, it is recommended to use a uasb reactor for the anaerobic treatment of cheese whey to produce a good effluent quality.
TRATAMIENTO DE AGUAS RESIDUALES DE LA INDUSTRIA LáCTEA EN SISTEMAS ANAEROBIOS TIPO UASB TREATMENT OF DIARY INDUSTRY WASTEWATER USING UASB ANAEROBIC SYSTEM
OSCAR ARANGO BEDOYA,LUCIANA SANCHES E SOUSA
Biotecnología en el Sector Agropecuario y Agroindustrial , 2009,
Abstract: Debido a sus ventajas respecto a los procesos aerobios en términos de mayor grado de estabilización de las aguas residuales, bajo crecimiento de biomasa y requerimientos nutricionales, producción de metano y no requerimiento de oxígeno, la digestión anaerobia es una alternativa viable para el tratamiento de las aguas residuales de la industria láctea. En esta investigación se evaluó el rendimiento y capacidad de un reactor anaerobio de lecho de fangos (UASB) para remover la carga de materia orgánica contenida en suero de quesería. El reactor UASB fue operado con un tiempo de retención hidráulica (TRH) de 1,3 días y velocidades de carga orgánica entre 1,7 a 18,5 g de DQO/L.d. Los máximos niveles de reducción de la demanda química de oxígeno (DQO) y de sólidos totales volátiles (STV) alcanzados fueron 98% y 97,2% respectivamente, con una velocidad de carga orgánica en el reactor de 9,6 g DQO/L.d, observándose una reducción en la eficiencia de remoción de la DQO hasta niveles de 77% cuando la carga orgánica se llevó a 18,6 g DQO/L.d. La producción máxima de gas metano generado a partir del suero de queso estudiado fue de 0,27 L CH4/g DQO afluente, con un contenido de metano en el biogás de 56%. Con base en los resultados se puede concluir que es recomendable el uso de reactores UASB para el tratamiento anaerobio de sueros de quesería, obteniéndose un efluente de buena calidad para su descarga final. Due to its advantages over aerobic process in terms of higher degree of wastewater stabilization, lower microbial yield and nutrient requirement, no oxigen requirement and methane production, anaerobic digestion presents as a viable alternative for dairy industry wastewater treatment. In this investigation the performance and capacity of an upflow anaerobic blanket reactor (UASB) treating whey for the organic matter removal were evaluated. The UASB reactor was operated at a hydraulic retention time (HRT) of 1,3 d and organic loading rates ranging from 1.7 to 18.5 g COD/L.d. The maximum total chemical oxygen demand (COD) and Total Volatile Solids (TVS) reduction was 98 and 97,2 % respectively occurred at the loading rates of 9.6 g COD/L.d. The COD removal efficiency was reduced to 77% when the organic loading rate was increasing to 18,6 g COD/L.d. The maximum anaerobic methane generation for the cheese whey studied was found to be 0,27 l CH4/g COD influent and the biogas methane content was 56%. Based on these results, it is recommended to use a UASB reactor for the anaerobic treatment of cheese whey to produce a good effluent quality.
Effects of Sky Conditions Measured by the Clearness Index on the Estimation of Solar Radiation Using a Digital Elevation Model  [PDF]
Marcelo de Carvalho Alves, Luciana Sanches, José de Souza Nogueira, Vanessa Augusto Mattos Silva
Atmospheric and Climate Sciences (ACS) , 2013, DOI: 10.4236/acs.2013.34064
Abstract:

This study evaluated the effects of sky conditions (measured by the clearness index, KT) on the estimation of solar radiation and its components. Solar radiation was calculated by a digital elevation model derived from the Shuttle Radar Topography Mission (SRTM). The calculated radiation was parameterized and validated with measured solar radiation from two stations inside the urban perimeter of the city of Cuiabá, Brazil, during 2006 to 2008. The measured solar radiation varied seasonally, with the highest values in December-March and the lowest in June-September. Comparisons between calculated and measured values for two sites in Cuiabá demonstrate that the model is accurate for daily Rg estimates under clear sky conditions based on Root Mean Square Error, Mean Bias Error and Willmott’s index. However, under partially cloudy and cloudy sky conditions the model was not able to provide robust estimates. Spatially, the highest values of incident Rg occurred on strands with North, Northeast and Northwest orientations and were lowest on those oriented to the South, Southeast and Southwest.

Equoterapia na reabilita??o da meningoencefalocele: estudo de caso
Sanches, Sissa Mara Nicodemo;Vasconcelos, Luciana Auxiliadora de Paula;
Fisioterapia e Pesquisa , 2010, DOI: 10.1590/S1809-29502010000400014
Abstract: hippotherapy is one among techniques used in rehabilitation of patients with neurological dysfunctions. the patient body's reactions to horse movements are known to have positive effects on patients' postural control, thus improving general mobility and motor functional performance. the purpose of this paper was to assess the effects of hippotherapy on balance, motor coordination, and functionality of a child with meningoencephalocele. a 3-and-a-half year-old girl with meningoencephalocele was submitted to 18 hippotherapy sessions (in a three- phase procedure - feeding, brushing, and riding) once a week. outcome measures were obtained by means of the berg and tinetti balance scales and the brazilian version of the pediatric evaluation of disability inventory (for general functional abilities), all applied before and after therapy, and at an 8-week follow-up assessment. results showed the child's significantly improved balance and motor coordination, which reflected on functional movement control, basic for performing daily living activities. functional gain was also perceived by the child's mother. this study provides a new insight into hippotherapy as a useful physical therapy modality for improving motor and functional ability of children with encephalocele.
Genomic instability in human actinic keratosis and squamous cell carcinoma
Cabral, Luciana Sanches;Festa Neto, Cyro;Sanches Jr, José A.;Ruiz, Itamar R. G.;
Clinics , 2011, DOI: 10.1590/S1807-59322011000400001
Abstract: objective: to compare the repetitive dna patterns of human actinic keratoses and squamous cell carcinomas to determine the genetic alterations that are associated with malignant transformation. introduction: cancer cells are prone to genomic instability, which is often due to dna polymerase slippage during the replication of repetitive dna and to mutations in the dna repair genes. the progression of benign actinic keratoses to malignant squamous cell carcinomas has been proposed by several authors. material and methods: eight actinic keratoses and 24 squamous cell carcinomas (scc), which were pair-matched to adjacent skin tissues and/or leucocytes, were studied. the presence of microsatellite instability (msi) and the loss of heterozygosity (loh) in chromosomes 6 and 9 were investigated using nine pcr primer pairs. random amplified polymorphic dna patterns were also evaluated using eight primers. results: msi was detected in two (d6s251, d9s50) of the eight actinic keratosis patients. among the 8 patients who had squamous cell carcinoma-i and provided informative results, a single patient exhibited two loh (d6s251, d9s287) and two instances of msi (d9s180, d9s280). two loh and one example of msi (d6s251) were detected in three out of the 10 patients with squamous cell carcinoma-ii. among the four patients with squamous cell carcinoma-iii, one patient displayed three msis (d6s251, d6s252, and d9s180) and another patient exhibited an msi (d9s280). the altered random amplified polymorphic dna ranged from 70% actinic keratoses, 76% squamous cell carcinoma-i, and 90% squamous cell carcinoma-ii, to 100% squamous cell carcinoma-iii. discussion: the increased levels of alterations in the microsatellites, particularly in d6s251, and the random amplified polymorphic dna fingerprints were statistically significant in squamous cell carcinomas, compared with actinic keratoses. conclusion: the overall alterations that were observed in the repetitive dna of actinic keratoses and s
Inter Seasonality of the Energy Fluxes in Brazilian Savana—Mato Grosso—Brazil  [PDF]
Leone Francisco Amorim Curado, José de Souza Nogueira, Luciana Sanches, Thiago Rangel Rodrigues, Francisco de Almeida Lobo, Marcelo Sacardi Bíudes
Atmospheric and Climate Sciences (ACS) , 2014, DOI: 10.4236/acs.2014.42025
Abstract:

Dynamics of flows of matter and energy these biomes are relevant to understanding of environmental processes that govern the biosphere-atmosphere interactions and between ecosystems. This study analyzed inter season and season of energy fluxes in Brazilian Savana through Bowen Ration Method. Results show differences in patterns LE in all season, LE predominant in wet while H in dry. This inversion in patterns of predominant components of the energy balance in wet and dry season because in wet season increase water content in soil and atmosphere due precipitation in this season providing more lost energy for atmosphere in shape LE through soil evaporation and plant transpiration, this results in LE and H in all season of the Brazilian Savana show higher variation in dynamics energy fluxes between surface and atmosphere, as well as energy partition in this biome. Statistics analyses presents than many climate variables influences LE and H in each season indicating complexity in this fluxes. More study is necessary to higher understand patterns energies fluxes in Brazilian Savana.

Efluxo de CO2 do solo em floresta de transi??o Amaz?nia Cerrado e em área de pastagem
Pinto-Junior, Osvaldo Borges;Sanches, Luciana;Dalmolin, Andrea Carla;Nogueira, José Souza de;
Acta Amazonica , 2009, DOI: 10.1590/S0044-59672009000400009
Abstract: the objective of this paper was (a) to estimate the co2 soil efflux in a mature transitional tropical forest amazonia and a area of pasture in the north of the mato grosso; (b) to analyzer the influence of the soil humidity and temperature, and accumulated litter. the measurements had been carried through with device of co2 absorption for infra-red ray (egm/wma-2 pp system, hitchin hertz, uk) in may/2005 to april/2006. the average values of the co2 efflux of the ground in the forest and the area of 5,45 and 4,94 μmolm-2s-1 pasture μmolm-2s-1, respectively. in the dry season the behavior of the co2 efflux of the ground was similar in the mature transitional tropical forest amazonian and in the area of pasture, and in the wet season the ecosystems had presented distinct behaviors, and the co2 efflux of the ground in the area of pasture was superior to the one in the transitional forest. it is essential that if it evaluates the influence of other factors in the co2 efflux in ecosystems located in one same ecótono for the attainment of new answers that contribution to clarify doubt atmospheric co2 emission to them the worldwide level.
Contribui??o de folhas na forma??o da serrapilheira e no retorno de nutrientes em floresta de transi??o no norte de Mato Grosso
Silva, Carlos José da;Lobo, Francisco de Almeida;Bleich, Monica Elisa;Sanches, Luciana;
Acta Amazonica , 2009, DOI: 10.1590/S0044-59672009000300014
Abstract: this study was conducted in an area of amazonia-cerado transition forest in the noirth of mato grosso state, brazil. the main objectives of the study was to quantify the variability of litter fall and litter pool biomass (leaves, flowers, fruits, and wood), and the participation of the leaves in the return of nitrogen, phosphorus and carbon to the soil through decomposition. litter was collected monthly during one year and leaves decomposition was analyzed during the dry and rainy seasons. litter fall varied along the year with higher values in the dry season and predominance of the leaf fraction. nevertheless, there was no significant difference between dry and rainy seasons for litter pool as well as significant correlation between litter pool and litter fall. decomposition of leaves was more intense in the rainy season in order of decreasing species: t. schomburgkii, thyrsodium sp, b. lactescens and p. sagotianum. the species p. sagotianum in both dry and rainy seasons showed most slowly decomposition. the potential return was 70.3 kg.ha-1.year-1for nitrogen, 76.1 kg.ha-1.years-1 for phosphorus, 3.5 ton.ha-1.years-1 for carbon. there was significant correlation between leave decomposition and nitrogen and phosphorus return for all species analyzed in the dry season. however, it was found significant correlation only for the carbon and the nitrogen for the species p. sagotianum in the rainy season.
Electrodeposition of Ni-Mo and Fe-Mo alloys from sulfate-citrate acid solutions
Sanches, Luciana S.;Domingues, Sergio H.;Carubelli, Ademir;Mascaro, Lucia H.;
Journal of the Brazilian Chemical Society , 2003, DOI: 10.1590/S0103-50532003000400011
Abstract: this paper reports on a study of the electrodeposition of ni-mo and fe-mo alloys on pt electrodes in a sodium citrate solution at ph 4.0. the alloys were subjected to cyclic voltammetry at different ion concentration ratios to identify their behavior. the electrodeposited coatings were analyzed by sem, edx and xrd. the results of the cyclic voltammetry tests indicated the presence of dissolution peaks only with high ni or fe ion concentrations. the sem analysis revealed that the two alloys had dissimilar morphologies and the ni-mo alloys were homogeneous and thick. the mo and o contents were higher in the ni-mo than in the fe-mo alloys. anomalous deposition was found to occur in the co-deposition of ni and mo.
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