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Search Results: 1 - 10 of 208207 matches for " Anderson Jorge de;Pereira "
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Tractor perfomance as a function of speed and seeder?s tire inflation pressure
Furlani, Carlos Eduardo Angeli;Cortez, Jorge Wilson;Toledo, Anderson de;Silva, Rouverson Pereira da;Grotta, Danilo Cesar Checchio;Reis, Gustavo Naves dos;
Ciência Rural , 2010, DOI: 10.1590/S0103-84782010005000124
Abstract: the performance of agricultural tractors under field conditions results from the interaction between tire and wheel affected by displacement speed. this work was developed to assess the performance of an agricultural tractor under different seeder's tire inflation pressure (518; 483 and 414kpa) and in two different gears providing speeds of 3.0 and 6.0km h-1. the experiment was performed at jaboticabal campus of s?o paulo state university (unesp). the experimental design used was entirely randomized in a 2-factor factorial design (3x2) with four replications. the draft force was influenced by the gear as well as by the required power; however, tire inflation pressure in the seeder did not change these parameters. also, fuel consumption was influenced only by the tractor gear. energy consumption was greater as speed increased, caused by gear shifting. the displacement speed was greater for the 518kpa pressure due to a lesser slippage in the seeder under this pressure. tractor slippage did not change.
Comportamento ingestivo de vacas leiteiras alimentadas com dietas à base de cana-de-a?úcar ou silagem de milho
Mendon?a, Sandro de Souza;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Valadares, Rilene Ferreira Diniz;Soares, Carla Aparecida;Lana, Rogério de Paula;Queiroz, Augusto César de;Assis, Anderson Jorge de;Pereira, Mara Lúcia Albuquerque;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000300021
Abstract: twelve purebred and crossbred holstein cows were assigned to three latin squares 4 x 4, balanced according to the lactating period, to evaluate the ingestive behavior parameters. the experimental diets were based on corn silage with 60:40 forage:concentrate ratio, in dry matter (dm) basis, or based on sugar cane with 60:40 or 50:50 forage:concentrate. the cows were submitted to visual observation for ingestive behavior evaluation. the animals were observed every 10 minutes, during 24 hours, to determine the time expended eating, ruminating and resting. there was no difference for the mean time expended eating and ruminating among the experimental diets. however, in the corn silage based diets, the animals expended less time idle, compared to those fed sugar cane based diets. feeding efficiency, expressed in gndf/h, showed no difference among the experimental diets. rumination efficiency, expressed in gdm/h, was similar for the different diets. rumination efficiency, expressed in gndf/h (ruendf) was higher for the corn silage based diet. there was no difference in ruendf among the sugar cane based diets. cows fed sugar cane based diets showed higher time expended in idle and smaller dm intake, when compared those fed corn silage based diets.
Balan?o de compostos nitrogenados, produ??o de proteína microbiana e concentra??o plasmática de uréia em vacas leiteiras alimentadas com dietas à base de cana-de-a?úcar
Mendon?a, Sandro de Souza;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Valadares, Rilene Ferreira Diniz;Soares, Carla Aparecida;Lana, Rogério de Paula;Queiroz, Augusto César de;Assis, Anderson Jorge de;Pereira, Mara Lúcia Albuquerque;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000200028
Abstract: twelve purebred and crossbred holstein cows were allotted to three 4 x 4 latin squares to evaluate the nitrogen (n) balance, microbial protein production, plasma and milk urea concentration and different urine collections times. the experimental diets were based on corn silage (cs) (ag 1051) with forage:concentrate ratio (f:c) of 60:40, in dry matter (dm) basis, or in sugar cane basis (sc) (rb 855536) with f:c of 60:40 with .35 or 1% of urea+ammonium sulfate (as) mixture or fc of 50:50 with 1% of urea+as. nitrogen balance (n) was higher for cs based diet, 88 g n/day, in relation to sc based diets with 40% concentrate, 67 or 69 g n/day. among the sc diet based, difference on n balance was observed. average total daily excretion of purine derivatives (dp), absorbed purine (ap) and estimated microbial n, 221 g/day, were higher for cs based diet, when compared to sc based diets with 40% concentrate, 180 ou 178 g microbial n/day. however, when compared to sc based diet with 50% concentrate, there was no difference for n balance, pd, ap and microbial n variables. there was no difference in the average total daily excretion of pd, ap and microbial n production among the diets containing sc. there was no difference on the daily mean urine excretion of creatinine (24 x 22 mg/ of kglw), urea, allantoin (245 x 228 mmol/day) and uric acid relative to the urine collection of 24 or 8 hours, or else, total or partial urine collection. sc based diet, corrected for 1% of urea+as, with 50% concentrate provided microbial protein production similar to that of cs based diet with f:c ratio of 60:40, in dm basis. n-urea plasma seems to be better indicator of the protein metabolism in dairy cows than n-urea in milk.
Consumo, digestibilidade aparente, produ??o e composi??o do leite e variáveis ruminais em vacas leiteiras alimentadas com dietas à base de cana-de-a?úcar
Mendon?a, Sandro de Souza;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Valadares, Rilene Ferreira Diniz;Soares, Carla Aparecida;Lana, Rogério de Paula;Queiroz, Augusto César de;Assis, Anderson Jorge de;Pereira, Mara Lúcia Albuquerque;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000200027
Abstract: twelve purebred and crossbred holstein cows were allotted to three 4 x 4 latin squares to evaluate the intake, apparent digestibility of nutrients, milk production and composition, ruminal ph and ammonia. the experimental diets were based on corn silage (cs) (ag 1051) with forage:concentrate ratio (f:c) of 60:40, in dry matter (dm) basis, or based on sugar cane (sc) (rb 855536) with f:c of 60:40 with .35 or 1% of urea+ammonium sulfate (as) mixture or f:c of 50:50 with 1% of urea+as. dm intake was 17.8, 14.9, 14.4, and 15.8 kg/day, for the diets, respectively. dm intake was higher, resulting in greater nutrient intake for cs based diet, except for the non fiber carbohydrates intake, which showed higher intake for sc based diet with 50% concentrate. milk production (mp) was higher for the cs based diet, with no difference in mp among the sc based diets, with mean values of 22.0, 19.0, 18.6, and 20.1 kg/day and the 3.5% fat corrected milk production was 23.0, 19.7, 19.4, and 21.3 kg/day for the cs, sc .35%, sc 1% and sc 1% 50:50, respectively. milk composition was not different among the experimental diets and milk fat contents were 3.8, 3.8, 3.8, and 3.9% for the cs, sc .35%, sc 1% and sc 1% 50:50, respectively. no difference on apparent digestibility of dm, organic matter, crude protein and total carbohydrates among the diets was observed. the neutral detergent fiber (ndf) apparent digestibility was higher for the cs based diet (47). there was no difference in ndf digestibility among sc based diets, 32, 31 and 31%, respectively. inside each time (before and three hours after the morning feeding) there was no difference of ph values and amonia nitrogen compounds (n-nh3) among the diets.
Letramento, heterogeneidade e alteridade: análise de narrativas orais produzidas por uma mulher n o-alfabetizada
Leda Verdiani Tfouni,Anderson de Carvalho Pereira
Alfa : Revista de Linguística , 2005,
Abstract: Este trabalho tem por objetivo investigar narrativas orais produzidas por uma mulher n o-alfabetizada do ponto de vista da instala o da heterogeneidade discursiva. A heterogeneidade é vista e detectada em uma dimens o constitutiva e em uma dimens o mostrada. A discuss o baseia-se ainda no conceito de letramento, e, partindo do pressuposto de que existe uma interpenetra o do discurso da oralidade e do discurso da escrita, procura detectar como, nas narrativas analisadas, esta alteridade constituída por quem sabe ler e escrever, é indiciada no discurso do n o-alfabetizado. As narrativas apresentadas - “As três estrelas de ouro na testa” e “A Branca Flor de Antuninho”- foram produzidas por Madalena de Paula Marques: uma mulher n o-alfabetizada e moradora da periferia de Ribeir o Preto-SP-Brasil. A análise procura mostrar que, ao jogar com os dois tipos de heterogeneidade citados, a narradora assegura um fluxo narrativo coerente concorde à fun o de autoria, conforme prop e a teoria de letramento que embasa o trabalho. Apontamos ainda aqui na dire o de afirmar que estas narrativas, mesmo sendo orais, apresentam marcas de escrita constituída pela heterogeneidade.
Molecular Characterization and Tandem Mass Spectrometry of the Lectin Extracted from the Seeds of Dioclea sclerocarpa Ducke
Jorge Luis Almeida Correia,Ant?nia Samia Fernandes do Nascimento,Jo?o Batista Cajazeiras,Ana Cláudia Silva Gondim,Ronniery Ilario Pereira,Bruno Lopes de Sousa,André Luiz Coelho da Silva,Wanius Garcia,Edson Holanda Teixeira,Kyria Santiago do Nascimento,Bruno Anderson Matias da Rocha,Celso Shiniti Nagano,Alexandre Holanda Sampaio,Benildo Sousa Cavada
Molecules , 2011, DOI: 10.3390/molecules16119077
Abstract: Lectin from the seeds of Dioclea sclerocarpa (DSL) was purified in a single step by affinity chromatography on a Sephadex G-50 column. The primary sequence, as determined by tandem mass spectrometry, revealed a protein with 237 amino acids and 81% of identity with ConA. DSL has a molecular mass of 25,606 Da. The β and γ chains weigh 12,873 Da and 12,752 Da, respectively. DSL hemagglutinated rabbit erythrocytes (both native and treated with proteolytic enzymes), showing stability even after one hour of exposure to a specific pH range. The hemagglutinating activity of DSL was optimal between pH 6.0 and 8.0, but was inhibited after incubation with D-galactose and D-glucose. The pure protein possesses a molecular mass of 25 kDa by SDS-PAGE and 25,606 Da by mass spectrometry. The secondary structure content was estimated using the software SELCON3. The results indicate that b-sheet secondary structures are predominant in DSL (approximately 42.3% antiparallel b-sheet and 6.7% parallel b-sheet). In addition to the b-sheet, the predicted secondary structure of DSL features 4.1% a-helices, 15.8% turns and 31.3% other contributions. Upon thermal denaturation, evaluated by measuring changes in ellipticity at 218 nm induced by a temperature increase from 20 °C to 98 °C, DSL displayed cooperative sigmoidal behavior with transition midpoint at 84 °C and permitted the observation of two-state model (native and denatured).
Asclepiadoideae (Apocynaceae) from Southeast Brazil-II. New synonyms and new occurrence for Metalepis cubensis in Brazil Asclepiadoideae (Apocynaceae) do Sudeste do Brasil-II. Novos sin nimos e nova ocorrência para Metalepis cubensis no Brasil
Jorge Fontella Pereira,Monique Britto de Goes
Pesquisa Florestal Brasileira , 2010, DOI: 10.4336/2012.pfb.58.77
Abstract: Metalepis cubensis (A. Rich.) Griseb. known only to Central America and north of South America (Colombia and Equador) is registered as a new occurrence to Brazil, Espirito Santo State. Eight taxa described previously are included here as new synonyms. Description and illustration are given. doi: 10.4336/2009.pfb.58.77 Metalepis cubensis (A. Rich.) Griseb. (Apocynaceae-Asclepiadoideae), conhecida somente na América Central e norte da América do Sul (Col mbia e Equador), é registrada como nova ocorrência para o Brasil no Estado do Espírito Santo. Oito táxons descritos anteriormente s o aqui incluídos como novos sin nimos. Também s o apresentadas descri o e ilustra o desta espécie. Doi: 10.4336/2009.pfb.58.77
Three-Dimensional Shear Wave Velocity Structure of the Northeastern Brazilian Lithosphere  [PDF]
Jorge Luis de Souza, Newton Pereira dos Santos, Carlos da Silva Vilar
International Journal of Geosciences (IJG) , 2016, DOI: 10.4236/ijg.2016.76063
Abstract: A large number of Rayleigh wave dispersion curves recorded at twenty three seismic stations was used to investigate the 3-D shear wave velocity structure of the northeastern Brazilian lithosphere. A simple procedure to generate a three-dimensional image of Mohorovicic; discontinuity was applied in northeastern Brazil and the Moho 3-D image was in agreement with several isolated crustal thicknesses obtained with different geophysical methods. A detailed 3-D S wave velocity model is proposed for the region. In the crust, our model is more realist than CRUST2.0 global model, because it shows more details either laterally or in depth than global model, i.e., clear lateral variation and gradual increase of S wave velocity in depth. Down to 100 km depth, the 3-D S wave velocity model in northeastern Brazil is dominated by low velocities and this is consistent either with heat flow measurements or with measurements of the flexural strength of the lithosphere developed in the South American continent. Our 3-D S wave velocity model was also used to obtain the lithosphere thickness in each cell of the northeastern Brazil and the results were consistent with global studies about the Lithosphere-Asthenosphere Boundary worldwide.
Effects of Sea Level Variation on Biological and Chemical Concentrations in a Coastal Upwelling Ecosystem  [PDF]
Marilia M. F. de Oliveira, Gilberto C. Pereira, Jorge L. F. de Oliveira, Nelson F. F. Ebecken
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.411A008
Abstract:

Oscillations in sea level due to meteorological forces related to wind and pressure affect the regular tides and modify the sea level conditions, mainly in restricted waters such as bays. Investigations surrounding these variations and the biological and chemical response are important for monitoring coastal regions mainly where upwelling shelf systems occur. A spatial and temporal database from Quick Scatterometer satellite vector wind, surface stations from the Southeast coast of Brazil and surface seawater data collected in Anjos Bay, Arraial do Cabo city, northeast of Rio de Janeiro State were used to investigate the meteorological influences in the variability of the dissolved oxygen, nutrients, meroplankton larvae and chlorophyll-a concentrations. Multivariate statistical approaches such as Principal Component Analysis (PCA) and Clustering Analysis (CA) were applied to verify spatial and temporal variances. A correlation matrix was also verified for different water masses in order to identify the relationship between the above parameters. A seasonal variability of the meteorological residual presents a well-defined pattern with maximum peaks in autumn/winter and minimum during spring/summer with negative values, period of occurrence of upwelling in this region. This lowering of the sea level is in accordance with the increasing of nutrients and meroplankton larvae for the same period. CA showed six groups and an importance of the zonal and meridional wind variability, including these variables in a single cluster. PCA retained eight components, explaining 64.10% of the total variance of data set. Some clusters and loadings have the same variables, showing the importance of the sea-air interaction.

Multivariate Analysis of Extreme Physical, Biological and Chemical Patterns in the Dynamics of Aquatic Ecosystem  [PDF]
Marilia Mitidieri Fernandes de Oliveira, Gilberto Carvalho Pereira, Nelson Francisco Favilla Ebecken, Jorge Luiz Fernandes de Oliveira
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.68080
Abstract: This study is a part of the research in monitoring systems of environmental impacts in coastal re-gions in order to develop trophic dynamic models to be used in the aquatic systems management. Meteorological influences in the variability of the nutrients, larvae concentration, dissolved oxygen (DO) and chlorophyll a were investigated in a region where upwelling occurs. Extreme seasonal variations of reanalysis, QuikSCAT, and surface stations from the southeast coast of Brazil, as well as, surface seawater data collected in Anjos Bay, Arraial do Cabo city northeast of Rio de Janeiro state, are analyzed. Seasonality and correlations are applied to verify the relationship between them, considering minimum values of sea surface temperature (SST) and sea level variation and maximum values of the other variables. Principal Component Analysis (PCA) and Hierarquical Cluster Analysis (HCA) are applied to verify spatial and temporal variances and to describe more clearly the structure of the local ecosystem. The seasonality of northeasterly extreme wind stress follows the seasonal pattern expected for the study area with peaks during spring. The SST has a well-defined seasonal pattern with maximum peaks from February to July and minimum peaks from September to January. Chlorophyll a presents higher seasonal peak in February, being in accordance with DO; both are related to the maximum primary productivity. Correlations of the physical variables (local and remote) with nutrients and larvae present a relatively similar pattern around 0.5, showing these variables have a reasonable interaction with the meteorological forcing. PCA shows a strong variability in pressure data around 0.9, which may be related to the seasonal variations in South Atlantic subtropical anticyclone (SASA) and consequently to the occurrence of upwelling in the region. HCA shows the twenty-five parameters into two big clusters with predominance of biotic variables in one side and abiotic ones at the other. The degree of refinement of similarities allowed a division into six clusters of samples, giving the most satisfactory results at forming distinct clusters with more accurate regarding physical and biological elements.
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