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Search Results: 1 - 10 of 322471 matches for " Clarice Garcia Borges;Ribeiro Júnior "
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Contagem de células somáticas e produ o de leite em vacas holandesas de alta produ o
Coldebella Arlei,Machado Paulo Fernando,Demétrio Clarice Garcia Borges,Ribeiro Júnior Paulo Justiniano
Pesquisa Agropecuária Brasileira , 2003,
Abstract: A mastite bovina pode ser clínica, com sinais visíveis, e subclínica, diagnosticada pela contagem das células somáticas. As perdas econ micas causadas pela mastite subclínica devem ser quantificadas para atender à demanda nacional de produtos lácteos. O objetivo deste trabalho foi verificar se as perdas na produ o de leite, pelo aumento do número de células somáticas, s o proporcionais ou independentes do nível de produ o. Foram utilizadas 7.756 observa es, colhidas mensalmente de um único rebanho, de setembro de 2000 a junho de 2002. A curva de lacta o foi modelada pela fun o gama incompleta, e os efeitos de ordem de lacta o, época do parto, ocorrência de doen as no periparto e escore de condi o corporal ao parto também foram considerados. A contagem de células somáticas foi incluída nesse modelo como fator multiplicativo, representando perdas relativas, e como fator aditivo, representando perdas absolutas. A escolha do melhor modelo foi baseada no critério de informa o de Schwarz (BIC). As perdas s o absolutas, evidentes a partir de 14.270 células/mL e para cada aumento de uma unidade na escala do logaritmo natural a partir desse valor, estimam-se perdas de 184 e 869 g/dia para vacas primíparas e multíparas, respectivamente.
Contagem de células somáticas e produ??o de leite em vacas holandesas de alta produ??o
Coldebella, Arlei;Machado, Paulo Fernando;Demétrio, Clarice Garcia Borges;Ribeiro Júnior, Paulo Justiniano;Corassin, Carlos Humberto;Meyer, Paula Marques;Cassoli, Laerte Dagher;
Pesquisa Agropecuária Brasileira , 2003, DOI: 10.1590/S0100-204X2003001200012
Abstract: the goal of this paper was to evaluate if losses in milk yield due to increase in somatic cells count are proportional or independent of the level of production. a total of 7,756 observations, monthly collected from a single herd from september/2000 up to june/2002, were used. the lactation curve was modeled by the incomplete gamma function, considering the effects of lactation order, calving season, peripartum disorder incidence and body condition score at calving. somatic cells count was added to the model as a multiplicative factor, representing relative losses, and as an additive factor, representing absolute losses. the best model was chosen based on the information criteria of schwarz (bic). the losses are absolute, becoming evident from 14,270 cells/ml, and they are 184 and 869 g/day for each increase of one unit in the natural logarithm scale, starting from that somatic cells count, for primiparous and multiparous cows, respectively.
Contagem de células somáticas e produ??o de leite em vacas holandesas confinadas
Coldebella, Arlei;Machado, Paulo Fernando;Demétrio, Clarice Garcia Borges;Ribeiro Júnior, Paulo Justiniano;Meyer, Paula Marques;Corassin, Carlos Humberto;Cassoli, Laerte Dagher;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000300011
Abstract: the relationship between milk somatic cells count (scc) and milk yield has been the aim of countless researches in several countries; however, in brazil, the literature related to this subject is scarce. therefore, the objective of this study is to verify if the losses in milk yield due to scc increase are proportional to the yield, or absolute (independent of it) and starting from which scc, the losses become evident. for this study, 13.725 observations were used, collected monthly from 6 different herds, from january/2001 up to june/2002. the analysis model, for lactation curve, was based upon the incomplete gama function, considering the effects of lactation order, herd and calving season. the scc entered in that model in two ways: as multiplicative factor (representing relative losses) and as addictive factor (representing absolute losses). the best model was chosen based on the information criteria of schwarz (bic). it is concluded that the losses are absolute, becoming evident from 17.000 cells/ml, and they are 238 and 868 ml/day for each increase of one unit in the natural logarithm scale, starting from that scc, respectively, for primiparous and multiparous.
Energetic and nutrient metabolizability values of corn obtained with nutritional corrections for broilers
Makiyama, Letícia;Alvarenga, Renata Ribeiro;Rodrigues, Paulo Borges;Zangeronimo, Márcio Gilberto;Oliveira, Evelyn Cristina de;Bernardino, Ver?nica Maria Pereira;Garcia Júnior, Ant?nio Amandio Pinto;Bertechini, Ant?nio Gilberto;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000500031
Abstract: the experiment was carried out to evaluate the influence of nutritional correction on the partial diet replacement or pure-food methodology to determine the energy values (apparent metabolizable energy - ame and nitrogen-correct apparent metabolizable energy - amen) and coefficient of metabolizability of nutrients of maize. the method of total excreta collection was used, with 120 female cobb 500? broilers weighing 1,339±3 g and at 28 days of age distributed in a completely randomized design with five replicates and four birds per experimental unit. the treatments were pure maize with three levels of nutritional correction (0, 50 and 100%) and a maize-replaced basal diet (400 g/kg) with two levels of correction (0 and 100%). the corrections were made in order to meet the nutritional requirements of calcium, available phosphorus and sodium yonder trace minerals, vitamins, choline, lysine, methionine + cystine, threonine and tryptophan. the ame and amen of maize and coefficient of metabolizability of dry matter were higher when correction at 100% was made, regardless of the methodology used (pure feed or replaced basal diet). the correction at 50% of nutrients increased the coefficient of metabolizability of crude protein in pure maize when compared with 0 or 100% of correction. the values determined with pure maize were lower than those determined with the method of partial replacement. the absence of nutritional correction underestimates the energy values and metabolizability of nutrients from maize.
Influence of secondary packing on the freezing time of chiken meat in air blast freezing tunnels
Santos, Clarice de ávila;Laurindo, Jo?o Borges;Silveira Júnior, Vivaldo;Hense, Haiko;
Ciência e Tecnologia de Alimentos , 2008, DOI: 10.1590/S0101-20612008000500038
Abstract: freezing of poultry cuts in continuous convective air blast tunnels is normally performed with the products protected by low density polyethylene (ldpe) as a primary packaging and using corrugated cardboard boxes (ccb) as secondary packaging. the objective of this work was to investigate the influence of these secondary packaging on the freezing of poultry cuts in continuous convective air blast tunnels. the study was performed by replacing ccb with perforated metal boxes (pmb) in order to remove the packaging thermal resistance. the assays, performed in a industrial plant, demonstrated that ccb used commercially for meat freezing have a high heat transfer resistance. their replacement with pmb can lead to shorter freezing times and spatially homogeneous freezing. reductions of up to 45% in the freezing times were observed using pmb. the plateau of the temperature curve, related to the freezing time of free water, was significantly reduced using pmb, which is accepted to lead to better product quality after thawing. as the products were protected by the ldpe films as primary packaging, their appearance were not affected. the results presented in this work indicate that replacing cbb with pmb can be an excellent alternative to reduce freezing time and improve freezing homogeneity in industrial air blast tunnels, which could also be applied to other products.
Spatial pattern detection modeling of thrips (Thrips tabaci) on onion fields
Ribeiro Jr, Paulo Justiniano;Viola, Denise Nunes;Demétrio, Clarice Garcia Borges;Manly, Bryan F.;Fernandes, Odair Aparecido;
Scientia Agricola , 2009, DOI: 10.1590/S0103-90162009000100013
Abstract: onion (allium cepa) is one of the most cultivated and consumed vegetables in brazil and its importance is due to the large laborforce involved. one of the main pests that affect this crop is the onion thrips (thrips tabaci), but the spatial distribution of this insect, although important, has not been considered in crop management recommendations, experimental planning or sampling procedures. our purpose here is to consider statistical tools to detect and model spatial patterns of the occurrence of the onion thrips. in order to characterize the spatial distribution pattern of the onion thrips a survey was carried out to record the number of insects in each development phase on onion plant leaves, on different dates and sample locations, in four rural properties with neighboring farms under different infestation levels and planting methods. the mantel randomization test proved to be a useful tool to test for spatial correlation which, when detected, was described by a mixed spatial poisson model with a geostatistical random component and parameters allowing for a characterization of the spatial pattern, as well as the production of prediction maps of susceptibility to levels of infestation throughout the area.
Alimentos e Nutri??o , 2009,
Abstract: The influence of supplementary-branched chain amino acids (BCAA) on 65Zn metabolism in rats was investigated in this study. Nutritional indicators of Zn, as absorption, body retention and secretion, were estimated using a multicompartment model. Two groups of eight male rats were force-fed a zinc-adequate diet (control group) and a zinc-adequate diet plus 0.52 9 BCAA/kg diet during 15 days. There was no significant difference for intake of Zn, absorption (34%), intestinal transit (tso) and the leveI of Zn in the intravascular compartment (plasma). On the other hand the extravascular compartment (organs) and specific concentration of Zn per 9 of tissue decreased after experimental period (p < 0.05) The rats supplememted with BCAA secreted Zn by urine twice faster than controls, but the secrotion of zinc by endogen feces were not decreased in this group. Thus, BCAA supplement changed the kinetic of Zn, increasing the urinary secretion and the loss of Zn from the body.
Livya Stefane Borges de Queiroz,Camila Meneghetti,Antonio Amandio Pinto Garcia Júnior,Antonio Gilberto Bertechini
Ciência Animal Brasileira , 2012,
Abstract: The objective of this work was to evaluate the phosphorous requirements (Pd) when monoammonium phosphate (MAP) is used as a phosphorous (P) source for broilers in the starter phase (1 to 21 days). We used 800 male chicks at one day old, in a 5x2 factorial arrangement, with five Pd levels (0.28, 0.34, 0.40, 0.46 and 0.52%) and two Ca levels (1.00 and 0.60), totaling ten treatments and eight replicates. Significant interaction was observed between the phosphorus and calcium levels from the diet, in the performances traits, bone ashes and P retention and excretion. Utilizing the level of 1.0% Ca in the diet, the best results of performance and bone ashes were founded when the levels of 0.42% and 0.439% Pd were used, respectively. Better contents of bone ashes were observed with the use of 0.60% Ca in the diet only when the lowest level of P was used. When the MAP was utilized as a source of P in the diet for broilers in the starter phase, the use of the 0.43% of Pd and 1.00% of Ca is enough to promote better performance and bone mineralization.
Desempenho de sistema de tratamento de lixiviado de aterro sanitário com recircula??o do efluente
Martins, Cláudia Lavina;Castilhos Júnior, Armando Borges de;Costa, Rejane Helena Ribeiro da;
Engenharia Sanitaria e Ambiental , 2010, DOI: 10.1590/S1413-41522010000400013
Abstract: the objective of this study was to evaluate the performance of a landfill leachate treatment system, at pilot scale, formed by three in series ponds (l1, l2, and l3) followed by a rock filter. three operational conditions were studied, assessing the effluent recirculation effect from l3 to l1: 0, 50 and 100% of the flow rate. the system assimilated well the load fluctuations, showing removal efficiencies over 80% for bodf, 70% for codt and 98% for ammonia. in the l2 pond there was partial nitrification with nitrite accumulation. it was observed an outstanding presence of the chlamydomonas gender in photosynthetic ponds l2 and l3. a reduction of the toxicity from the landfill leachate was observed, with reduction of over 95% in the system output. the better removal efficiency for the three studied operational conditions was obtained for 100% of recirculation.
Estimativa do valor energético dos alimentos e valida o das equa es propostas pelo NRC (2001)
Rocha Júnior Vicente Ribeiro,Valadares Filho Sebasti?o de Campos,Borges álan Maia,Detmann Edenio
Revista Brasileira de Zootecnia , 2003,
Abstract: Neste trabalho objetivou-se estimar os valores energéticos dos alimentos, através das equa es propostas pelo último NRC para gado leiteiro, utilizando como banco de dados as "Tabelas Brasileiras de Composi o de Alimentos para Bovinos" e um experimento com ovinos, e validar essas equa es a partir de observa es referentes ao NDT e às fra es digestíveis da fibra em detergente neutro (FDND), proteína bruta (PBD), extrato etéreo (EED) e carboidratos n o fibrosos (CNFD), obtidas da literatura brasileira, a partir de experimentos in vivo, quando foram atendidas as exigências de manten a. O procedimento de valida o dos parametros avaliados foi realizado por intermédio do ajuste de modelo de regress o linear simples dos valores preditos e dos observados. Os valores de NDT observados e preditos, tanto para os alimentos volumosos como para os concentrados, foram similares. Entretanto, quando se considerou apenas a estimativa da FDND de alimentos volumosos, verificou-se rejei o de ambas as hipóteses de nulidade, ou seja, tanto o intercepto quanto o coeficiente de inclina o foram diferentes de zero e um, respectivamente. Para a fra o nitrogenada dos alimentos n o foi constatada nenhuma diferen a entre os parametros avaliados, havendo correspondência dos valores preditos aos observados. O EED de alimentos volumosos e concentrados, produzidos em condi es tropicais, é subestimado pela equa o utilizada pelo NRC, assim como os CNFD dos alimentos concentrados. Portanto, pode-se concluir que os valores de NDT obtidos a partir da equa o proposta pelo NRC foram compatíveis com os dados observados de alimentos produzidos em condi es brasileiras, todavia, sugere-se que sejam feitos alguns ajustes das equa es que estimam as fra es digestíveis da FDN, do EE e dos CNF.
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