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Search Results: 1 - 10 of 376147 matches for " J. Ferreira da Silva "
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Representa es sociais e agricultura familiar: indícios de práticas agrícolas sustentáveis no Vale do Bananal – Salinas, Minas Gerais / Social representations and family farming: evidence of agricultural practices in sustainable in the Bananal Valley ....
Adilson Jose da Silva,Milton Ferreira Silva Júnior
Revista Sociedade & Natureza , 2010,
Abstract: A agricultura tem mostrado através dos tempos, responsabilidade histórica na transforma o dos espa os naturais, proporcionada pela crescente necessidade de produ o de alimentos. A intensa discuss o dos problemas ambientais da atualidade tem exigido reflex o sobre a rela o homem-natureza. O presente artigo, resultado de pesquisa de mestrado no Vale do Bananal, município de Salinas, Minas Gerais, do Programa de Pós-Gradua o da Universidade Estadual de Santa Cruz, traz elementos da representa o social do pequeno produtor rural, sobre meio ambiente e práticas agrícolas, mediante análise de seu discurso representado na coletividade e de sua prática agrícola de base familiar. Foi utilizada a teoria das Representa es Sociais com a pesquisa de campo por meio da entrevista semi-estruturada e observa o direta. A análise dos dados ocorreu através do Discurso do Sujeito Coletivo. Identificou-se vários problemas ambientais como desmatamento, uso de agrotóxicos, descaracteriza o da mata ciliar, eros o, contamina o de rio. Pode-se inferir que embora o pequeno produtor rural do Vale do Bananal no município de Salinas, possua uma percep o naturalista do meio ambiente, há indícios de práticas de uma agricultura sustentável.
Depress?o: pontos de vista e conhecimento de enfermeiros da rede básica de saúde
Silva, Mariluci Camargo Ferreira da;Furegato, Antonia Regina Ferreira;Costa Júnior, Moacyr Lobo da;
Revista Latino-Americana de Enfermagem , 2003, DOI: 10.1590/S0104-11692003000100002
Abstract: this study aimed at identifying the viewpoints and the knowledge on depression of nurses working in the basic health network. the 73 participants who answered two self-applicable questionnaires were distributed in 28 health units. the general results concerning their viewpoints and knowledge are, in most answers, in accordance with what was expected and showed average knowledge related to depression. however, the individual analysis of such answers indicate that these professionals are not in direct contact with and do not know how to identify depressed patients. they do not observe these indicators in the patients that they assist or do not understand that it is their task to do so. reflections appeared concerning the possible relationship between mental health actions and their professional education. in this way, undergraduate and continuing education become more important in the development of nursing actions for mental health.
Depress o: pontos de vista e conhecimento de enfermeiros da rede básica de saúde
Silva Mariluci Camargo Ferreira da,Furegato Antonia Regina Ferreira,Costa Júnior Moacyr Lobo da
Revista Latino-Americana de Enfermagem , 2003,
Abstract: Objetivou-se identificar os pontos de vista e o conhecimento sobre depress o de enfermeiros da rede básica de saúde. Os 73 participantes que responderam a dois questionários auto-aplicativos, encontraram-se distribuídos em 28 unidades de saúde. Nos resultados gerais dos pontos de vista e do conhecimento, a maioria das respostas est o de acordo com o que se esperava, com médio conhecimento sobre depress o. Entretanto, nas análises individuais dessas quest es, os resultados indicam que esses profissionais n o est o em contato direto e n o sabem identificar pacientes deprimidos, n o observam estes indicadores nos pacientes por eles atendidos ou n o entendem que seja sua tarefa fazer essa identifica o. Surgiram reflex es acerca da possível rela o entre as a es de saúde mental com a sua forma o profissional. Dessa maneira, o ensino na gradua o e a educa o continuada passam a ter maior importancia no desenvolvimento das a es de enfermagem para a saúde mental.
Tolerancia do tamanho da semente de soja (Glycine max (L.) Merr.) ao metribuzin Tolerance of soybeans (Glycine max (L.) merr.) seeds of different sizes to metribuzin
J. Ferreira da Silva,J. Francisco da Silva,R.F. da Silva,A.R. Conde
Planta Daninha , 1981, DOI: 10.1590/s0100-83581981000200005
Abstract: Este experimento foi instalado em casa-de-vegeta o com o objetivo de avaliar a tolerancia de três tamanhos de sementes de soja (Glycine max (L.) Merr.), cv. UFV-1 classificadas nas peneiras de 10/64" x 3/4", 13/64" x 3/4" e 15/64 x 3/4", a diferentes doses de metribuzin (4-amino-6-tertbutil-3-(metiltio-as-triazina-5(4H) ona ). As doses de 0, 300, 600, 900 e 1.200g do i.a./ha foram aplicadas nos materiais do solo de Ponta Nova-MG classificado como franco-argilo-arenoso, e as doses de 0, 50, 100, 150, 200, 250, 300, 350 e 600g do i.a./ha em areia lavada. Nos materiais de solo de Ponte Nova, a inibi o de 50% do crescimento (I50) das plantas de soja correspondeu à aplica o de 600, 1050 e 1150 g/ha de metribuzin, enquanto em areia lavada os I-,,, foram de 150, 210 e 265g/ha de metribuzin para as sementes retidas nas peneiras 10/64" x 3/4", 13/64" x 3/4" e 15/64" x 3/4", respectivamente. O aumento do tamanho da semente aumentou a toleráncia da soja ao metribuzin. The tolerance of soybeans (Glycine max (L.) Merr.) seeds of three different sizes to the herbicide metribuzin (4-amino-6-tert-butil-3-(metiltio)-astriazina-5(4H)ona) was examined in greenhouse. Seeds were separated on 10/64" x 3/4", 13/64" x x 3/4" and 15/64" x 3/4" sieves. Herbicide doses equivalent to 0, 300, 600, 900 and 1.200g a.i./ha were applied to a sandy loam Ponte Nova (M.G.) soil and 0, 50, 100, 150, 200, 250, 300, 350 to 600g a.i./ha to washed sand. The growth of seeds of size 10, 13 and 15 were 50% inhibited (I50) at levels of 600, 1050 and 1150g of metribuzin in the soil and 150, 210 and 265g/ha in the sand. Thus larger seeds showed greater tolerance.
Lixivia o e inativa o do metribuzin em dois tipos de solos Leaching and inactivation of metribuzin in two soil types
J. Ferreira da Silva,J. Francisco da Silva,R.F. da Silva,A.R. Condé
Planta Daninha , 1981, DOI: 10.1590/s0100-83581981000200002
Abstract: Com o objetivo de avaliar a lixivia o e a inativa o do herbicida metribuzin (4-amino-6-tertbutil-3-(metiltio)-as-triazina-5-(4H)ona) em materiais de um solo franco-argiloso e de outro solo franco-argilo-arenoso de duas regi es de Minas Gerais, um em laboratório e outro em casa de vegeta o. O solo franco-argiloso era um Latossolo Roxo, com 2,8% de matéria org nica e o solo franco-argilo-arenoso era um Podzólico Vermelho-Amarelo; fase terra o, em 2,17% de matéria organica. Em laboratório estudou-se a lixivia o do metribuzin em colunas de 5, 10 e 15 cm de altura, com 7,5 cm de diametro, enchidas com materiais dos solos franco-argiloso e do solo franco-argiloarenoso. Usou-se o ensaio biológico de discos de cotilédones de melancia para detectar o metribuzin no lixiviado. Em casa de vegeta o, estudou-se a inativa o do metribuzin com materiais dos mesmos solos utilizados para o estudo de lixivia o. Para este ensaio foram utilizadas as doses de 0, 50, 80, 110, 140, 170 e 200g do i.a./ha do produto, e em areia lavada, as doses foram de 0, 4, 6, 8, 10, 12 e 16 g do i.a./ha do metribuzin, usando o pepino como planta teste, que foi cortado rente ao solo e pesado aos 14 dias após o plantio. Informa es adicionais s o necessárias para explicar porque o solo franco -argiloso inativa mais o metribuzin que o solo franco-argilo-arenoso. Laboratory and greenhouse experiments were made to evaluate the leaching and the inactivation of the metribuzin in clay loam and sand clay loam soils. The clay loam soil was a dark, red latosol with 2,8% organic matter and the sand clay loam soil was a reddish-yellow podzol with 2,17% organic matter. Leaching of metribuzin was studied in the laboratory in colums of 5, 10 and 15 cm high, 7.5 cm diameter, filled with soil. Watermelon cotiledon discs were used to measure the metribuzin leached. The inactivation of metribuzin was estudied in a greenhouse using doses of 0, 50, 80, 110, 140, 170 and 200 g/ha on the two soils, and 0, 4, 6, 8, 10, 12 and 16 g/ha were used for testing in sand. The test plants were cucumber that weighed after 14 days growth. Additional information is needed to explain why the clay loam soil inactivates metribuzin more than the sand clay loam soil and clarify the roles.
A comparative study of the photochemistry of biphenyl adsorbed on cellulose and silicalite
J. P. Da Silva,L. F. Vieira Ferreira
International Journal of Photoenergy , 2004, DOI: 10.1155/s1110662x04000248
Abstract: The photochemistry of biphenyl (BP) was studied on two model solid supports, silicalite and cellulose, using time resolved diffuse reflectance techniques and product degradation analysis. The results showed that the photochemical behaviour of BP depends on the solid support. Ground state absorption spectra indicated a near planar configuration in the ground state. BP triplet state was the only species detected on cellulose, while the radical cation (BP•
New record of Haplometroides intercaecalis (Digenea, Plagiorchiidae) infecting a Brazilian snake
Silva, R. J.;Béda, A. F.;Ferreira, V. L.;
Journal of Venomous Animals and Toxins including Tropical Diseases , 2008, DOI: 10.1590/S1678-91992008000100013
Abstract: phalotris matogrossensis (serpentes, colubridae) was reported as a new host for haplometroides intercaecalis (digenea, plagiorchiidae). the host snake was obtained from the municipality of anastácio, state of mato grosso do sul, brazil. one specimen of h. intercaecalis was recovered from the esophagus of the host and identified by the intercecal position of the vitellaria in the pre-acetabular region. this paper describes the second report of the occurrence of this trematode in fossorial snakes of the genus phalotris in the state of mato grosso do sul, brazil.
Capacidade da lagoa de estabiliza??o, integrante de um sistema piloto, na remo??o da carga organica da água residuária do processamento do café por via úmida
Silva, Júlia Ferreira da;Campos, Cláudio Milton Montenegro;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000600026
Abstract: wet coffee processing, besides its efficiency in getting better coffee quality, also minimizes considerably drying costs, and moreover reduces the space due to the ground-flour spreading seeds. however, this type of processing produces large quantities of wastewater, which must be treated before being discharged into the sewage system. the main objective of this research was to monitor the stabilization pond, as part of a pilot system, and therefore, to evaluate its efficiency concerning the organic loading removal and also to develop a model that can describe the auto-purification. in this research it was used 300.200 liters of coffee fruits, coffea arabica l., specie, in the wet processing. the organic loading rate applied was 136 kgcod d-1.the performance of this unit was monitored through chemical and physical-chemical analysis, and the mathematical modeling was developed based on the hydric balance, on the theoretical cod estimation and on the actual analysis of cod realized. the stabilization pond effluent presented averages of initial and final cod concentration of 7.100 mg l-1 and 100 mg l-1, respectively. it was found that the stabilization pond was responsible for removing 80% of the total organic matter present in the affluent. the adjusted model developed showed a satisfactory regression coefficient (r2 = 0,8015).
Estimativa da evapotranspira??o real diária utilizando-se imagens digitais TM - Landsat 5
Bezerra, Bergson G.;Silva, Bernardo B. da;Ferreira, Nelson J.;
Revista Brasileira de Meteorologia , 2008, DOI: 10.1590/S0102-77862008000300005
Abstract: quantification of evapotranspiration is of great importance for hydrological and meteorological modeling and indispensable for water management of irrigated crops. in this sense the main objective of this study was the estimation of actual daily evapotranspiration (etr), in local and regional scale, utilizing the sebal (surface energy balance algorithm for land). the tm - landsat 5 images and weather data were used in order to assess the energy balance components. the studied area is located in cariri region, ceará state, and is composed by irrigated areas, native vegetation and part of the chapada do araripe reserve. four tm - landsat 5 images of september 29th, october 15th, october 31st and november 16th of 2005, were used. daily etr was estimated based on the density of latent heat flux, obtained as residue of the energy balance equation. the application of the sebal algorithm includes some steps as radiometric calibration, estimation of the reflectance and albedo, emissivity and vegetation index, based on the reflective bands of the orbital sensors and further on the surface temperature (thermal band) for the tm - ladsat 5. two irrigated fields of castor bean and cotton were used do validated the etr estimated values. the reference evapotranspiration was obtained by fao-penman-monteith method. the mean daily etr over the studied area presented values of 3.8, 3.7, 4.6 and 3.4 mm.dia-1 on 29/09, 15/10, 31/10 and 16/11, respectively. when compared to measured data in the castor bean (ricinus communis l.) and cotton (gossypium hirsutum) irrigated crops, the etr values obtained with sebal present differences smaller than 1,0 mm day-1, showing its importance and accuracy.
Comparative Skill of Numerical Weather Forecasts in Eastern Amazonia  [PDF]
Bergson Cavalcanti de Moraes, Douglas Batista da Silva Ferreira, Luiz Gylvan Meira Filho, Juarez Ventura de Oliveira, Everaldo Barreiros de Souza, Pedro Pereira Ferreira Júnior, Renata Kelen Cardoso Camara, Edson José P. da Rocha, Jo?o Batista M. Ribeiro
Atmospheric and Climate Sciences (ACS) , 2013, DOI: 10.4236/acs.2013.33037
Abstract:

The present study evaluates the performance of three numerical weather forecasting models: Global Forecast System (GFS), Brazilian Regional Atmospheric Modelling System (BRAMS) and ETA Regional Model (ETA), by means of the Mean Error (ME) and the Root Mean Square Error (RMSE), during the most rainy four months period (January to April 2012) on Eastern Amazonia. The models displayed errors of superestimation and underestimation with respect to the observed precipitation, mainly over center-north of Pará and all of Amapá, where the precipitation is higher. Among the analyzed models, GFS shows the best performance, except during January and March, when the model to underestimated precipitation, possibly due to the anomalously high values recorded.

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