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Search Results: 1 - 10 of 325509 matches for " Ribeiro Júnior Paulo Justiniano "
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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.
Compara??o das comunidades de Entomobryidae e Isotomidae (Collembola) entre plantio direto em três níveis de fertilidade, plantio convencional e um ecossistema natural (campo nativo) em Ponta Grossa, Paraná, Brasil
Sautter, Klaus Dieter;Santos, Honório Roberto dos;Ribeiro Júnior, Paulo Justiniano;
Revista Brasileira de Zoologia , 1999, DOI: 10.1590/S0101-81751999000100006
Abstract: this work had as objective to compare the communities of entomobryidae and isotomidae (collembola) among no-tillage in three fertility levels, conventional tillage and a natural ecosystem (native grassland). in the no-tillage in low fertility and medium fertility entomobryidae and isotomidae had populational picks in the winter and in the summer. in the no-tillage in area of high fertility, there was a populational pick for both families in the summer. in relation to the conventional tillage, entomobryidae had a populational pick in the winter, and isotomidae in the winter and in the summer. in the natural ecosystem entomobryidae presented populational picks in the winter and in the summer and isotomidae had regular populational fluctuation along the period of the experiment. the final mean density of entomobryidae was larger in the natural ecosystem, proceeded by the treatments of no-tillage and finally, for the conventional tillage. in relation to isotomidae, the no-tillage in area of low fertility was superior, coming the conventional tillage soon after, the no-tillage in médium and high fertility, and, finally, the natural ecosystem.
Compara??o das comunidades de Sminthuroidea e Onychiuridae (Collembola) entre plantio direto em três níveis de fertilidade, plantio convencional e um ecossistema natural (campo nativo) em Ponta Grossa, Paraná, Brasil
Sautter, Klaus Dieter;Santos, Honório Roberto dos;Ribeiro Júnior, Paulo Justiniano;
Revista Brasileira de Zoologia , 1999, DOI: 10.1590/S0101-81751999000100007
Abstract: this work had as objective to compare the communities of sminthuroidea and onychiuridae (collembola) among no-tillage in three fertility levels, conventional tillage and a natural ecosystem (native grassland). in the conventional tillage and in the no-tillage in area of medium fertility, the community of sminthuroidea had regular fluctuation along the period of the experiment, but wtth low densities. the no-tillage in area of high fertility presented a populational pick in the autumn; the no-tillage in area of low fertility, in the spring; and, the natural ecosystem, in the summer. as the final mean density of the population of sminthuroidea, was observed that the no-tillage in area of low fertility went numerically superior to the others, proceeded by the natural ecosystem, no-tillage in area of high fertility, conventional tillage, and, finally, no-tillage in area of medium fertility. onychiuridae had three populational picks in the no-tillage in area of low fertility: being a larger in the winter and other two, smaller in the summer and in the autumn. in the no-tillage in area of medium fertility presented only a populational pick in the winter. in the other treatments there was not significantly populational picks. in relation to the final mean density ofthe community of onychiuridae, the no-tillage plantation in area of low fertility was superior, proceeded by the other treatments of no-tillage, and, in third plan, the natural ecosystem and the conventional tillage.
Influência do boro, de fontes de nitrogênio e do pH do solo no controle de hérnia das crucíferas causada por Plasmodiophora brassicae
Ruaro, Lucimeris;Lima Neto, Vismar da C.;Ribeiro Júnior, Paulo Justiniano;
Tropical Plant Pathology , 2009, DOI: 10.1590/S1982-56762009000400005
Abstract: effects of boron (b) doses and nitrogen sources (n) at different levels of soil ph on the control of clubrootwas investigated in transplants of chinese cabbage grown in pots containing field soil.. b dissolved in water was applied at 0, 5, 10, 20 and 30 mg.kg-1 of soil of ph 5.5, 6.2 and 7.3 on the day before transplanting. n sources tested (ammonium sulfate, urea and calcium nitrate) were applied to soil of ph 5.5 and 7.3. seedlings were inoculated with a suspension of resting spores of the pathogen at transplanting and assessed for clubroot severity after 45 days. the disease was severe (70%) when the b dose was less than 10 mg.kg-1 and the ph less than 6.0, but milder (26%) when the b dose was 10 to 30 mg.kg-1 soil at ph values higher than 6.5. clubroot was least severe when calcium nitrate was used in soil of ph 6.5. clubroot severity correlated negatively with concentrations of n, ca, mg and b in the foliage. we conclude that use of 10 to 30 mg.kg-1 boron and calcium nitrate in soil of ph 6,5 or 7,3 was effective in reducing club root severity.
Aplica??o de métodos geoestatísticos para identifica??o de dependência espacial na análise de dados de um ensaio de espa?amento florestal em delineamento sistemático tipo leque
Oda-Souza, Melissa;Barbin, Décio;Ribeiro Júnior, Paulo Justiniano;Stape, José Luiz;
Revista árvore , 2008, DOI: 10.1590/S0100-67622008000300011
Abstract: the systematic design stands out for its compactness, broadness and for allowing the testing of a larger number of spacings. however, it is not used due to the systematic arrangement (non-randomized) of the plants and the high sensibility for missing values. the aim of this work was to describe the geostatistic model and associated methods of inference in the analysis context of non-randomized experiment, reporting applied results to identify the spatial dependence in a fan systematic design of eucalyptus dunnii. furthermore, different alternatives for treating missing values that can occur from flaws and/or mortality of plants were proposed, analyzed and compared. data were analyzed by three models that differed, with covariates, in the form of modeling missing data values. a semivariogram was built for each model, adjusting three correlation function models, being the parameters estimated through the maximum likelihood method and selected by the akaike's criterion. these models, with and without the spatial component, were compared by the likelihood ratio test. the results showed that: (1) the covariates interacted positively with the response variable, avoiding data to be discarded; (2) the model comparison, with and without the spatial component, did not confirm the existence of dependence; (3) the incorporation of the spatial dependence structure into the observational models recovered the capacity to make valid inferences in the absence of randomization, overcoming operational problems and guaranteeing that the data can be subjected to classic analysis.
SPATIAL DEPENDENCE STUDY OF Eucalyptus grandis DENDROMETRIC CHARACTERISTICS
José Marcio de Mello,Jo?o Luís Ferreira Batista,Marcelo Silva de Oliveira,Paulo Justiniano Ribeiro Júnior
CERNE , 2005,
Abstract: The knowledge of spatial continuity structure of dendrometric characteristics is crucial in forest inventory, managementand planning. The inclusion of spatial continuity effect in inventory analysis provides stable and safe results that can be used in forestmanagement and planning. This paper evaluated the structure of spatial continuity of four dendrometric characteristics obtainedby two sampling procedures. Data were collected in 987 hectares of Eucalyptus grandis, located in the south of S o Paulo State.Two sampling procedures were used, systematic grading and unencumbered systematic. For each plot from the two samples, thefollowing dendrometric characteristics were measured: volume, quadratic average diameter, basal area and average height of thedominant trees. For each one of these characteristics, anisotropic and isotropic semi variogrammes were built, in order toevaluate the spatial continuity structure. The semi variogrammes were built using the moment estimator method. The mainauthorized functions were adjusted to the experimental semi variogrammes, by The Minimum Square Method. The behavior of thespatial continuity was evaluated through the degree of spatial dependence and of the assigned semi variogrammes for the fourcharacteristics, in the appraised sampling methods, respectively. All appraised characteristics presented spatially structured,independently of the appraised sampling procedure. The continuity structure of the four characteristics was isotropic, i.e., thevariance among pairs of points depends on the separation vector h. Therefore, unidirectional semi variogrammes can be built forall appraised characteristics. The results suggest that, in forest inventory, the spatial component should be considered, i.e., plotsshould not be treated separately.
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.
Elabora??o de escala diagramática para furo-de-bala e avalia??o de doen?as foliares em dois sistemas de produ??o de pessegueiro
Challiol, Marcio Alberto;May-De Mio, Louise Larissa;Cuquel, Francine Lorena;Monteiro, Lino Bittencourt;Serrat, Beatriz Monte;Motta, Ant?nio Carlos Vargas;Ribeiro Júnior, Paulo Justiniano;
Revista Brasileira de Fruticultura , 2006, DOI: 10.1590/S0100-29452006000300012
Abstract: the main leaf diseases on peach in araucaria and lapa counties, both in the state of parana, brazil, are rust (tranzschelia discolor) and shot hole (wilsonomyces carpophilus). the first one causes defoliation just after the harvesting, and the second one is always present in the orchards, though its effects are not well known due to the lack of assessment methodology for that disease. this research aimed to develop a diagrammatic scale for shot hole and compare the incidence and severity of leaf diseases in integrated (pi) and conventional (pc) management systems. the shot hole diagrammatic scale was developed in the first year of assessment by selecting leaves with different levels of severity; the minimum and maximum levels of the disease in the fields were established and the other levels were intercalated according to visual accuracy. in order to compare the two production systems - pi and pc, two experimental sites were set in two producing areas (araucaria and lapa) with three-year-old commercial peach orchards, cultivar 'chimarrita', which were evaluated during the 2002/3 and 2003/4 seasons. the pi system was carried out according to techniques recommended for peach pi and the pc was carried out as the system applied by the growers in each area. in order to evaluate the diseases, the incidence and severity of shot hole and rust were quantified in marked branches, from october to april, in two seasons. in addition, defoliation was also determined during the evaluation period. the designed diagrammatic scale established six levels of shot hole severity and can be recommended for the assessment to compare production systems and to monitor the disease in the field. in araucaria the incidence and severity of shot hole presented inverse behavior between the years, and was lower in the pi system in the first season and higher in the second, whereas rust was less severe and caused less defoliation in the pi system in the first year. in lapa no differences were observ
Precis?o do diagnóstico clínico da síndrome do desconforto respiratório agudo quando comparado a achados de necropsia
Pinheiro, Bruno Valle;Muraoka, Fabiana Sayuri;Assis, Raimunda Violante Campos;Lamin, Raul;Pinto, Sérgio Paulo dos Santos;Ribeiro Júnior, Paulo Justiniano;Oliveira, Júlio César Abreu de;
Jornal Brasileiro de Pneumologia , 2007, DOI: 10.1590/S1806-37132007000400011
Abstract: objective: to compare the american-european consensus conference (aecc) definition of acute respiratory distress syndrome (ards) to autopsy findings. methods: all patients who died in the intensive care unit of the federal university of juiz de fora university hospital between 1995 and 2003 and were submitted to autopsy were included in the study. patient clinical charts were reviewed to establish whether cases met the aecc criteria for a diagnosis of ards, histologically defined as the presence of diffuse alveolar damage (dad). results: during the study period, 592 patients died, and 22 were submitted to autopsy. of those 22 patients, 10 (45%) met the aecc criteria, and 7 (32%) met the histopathological criteria for dad. the aecc clinical criteria presented a sensitivity of 71% (95%ci: 36-92%) and a specificity of 67% (95%ci: 42-85%). the positive and negative predictive values were, respectively, 50 and 83%, whereas the positive and negative likelihood ratios were, respectively, 2.33 and 0.47. the histopathological findings in the 5 patients who met aecc criteria but did not present dad were pneumonia (n = 2), pulmonary embolism (n = 1), tuberculosis (n = 1), and cryptococcosis (n = 1). conclusion: the accuracy of the aecc definition of ards was godless than satisfactory. due to the low positive predictive value and the low positive likelihood ratio, other hypotheses must be considered when ards is suspected.
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