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Search Results: 1 - 10 of 46372 matches for " Paulo Roberto;Campos "
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Manejo do solo e da irriga??o como nova tática de controle de Meloidogyne incognita em feijoeiro
Dutra, Marcos Roberto;Campos, Vicente Paulo;
Fitopatologia Brasileira , 2003, DOI: 10.1590/S0100-41582003000600005
Abstract: population of meloidogyne incognita were evaluated in the soil and by biotesting. the population fluctuation of m. incognita was also studied during the beans (phaseolus vulgaris) life cycle. two days after the treatments in the field, plowing, without irrigation was found to be the most efficient in reducing j2 population (p<0,01), followed by plowed-irrigated plots. the soil inoculum infectivity, however, was lower (p<0,01) in plowed-irrigated plots than in plowed soil only. at 14 days, the lowest (p<0,01) j2 population was observed in plowed-irrigated plots, followed by plowed soil. the infectivity at 14 days was different (p<0,01) for all treatments, but lowest (p<0,01) in plowed-irrigated plots. at 45 days after bean planting in the field, the j2 population in soil was, also, different (p<0,01) for all treatments, but still the lowest (p<0,01) in plowed-irrigated soil 14 days before seeding. at 90 days, in the field, the numbers of eggs and egg-masses per bean plant, and the numbers of j2 in the soil were also the lowest (p<0,01) in plowed-irrigated plots. the root and shoot weight of field bean in plowed and plowed-irrigated plots were equally (p<0,01) high, but higher (p<0,01) than in control and in only irrigated plots. crop yield was different in all treatments (p<0,01). the greatest (p<0,01) bean yield occurred in plowed-irrigated plots 14 days before seeding with an increased productivity of four times compared to the control. irrigation as a way of increasing effectiveness against plant parasitic nematodes has been previously postulated but never proved experimentally, as it was accomplished in this work.
Relationship between the recurrent laryngeal nerve and the inferior thyroid artery: a study in corpses
Campos, Bernardo Almeida;Henriques, Paulo Roberto Ferreira;
Revista do Hospital das Clínicas , 2000, DOI: 10.1590/S0041-87812000000600001
Abstract: the anatomical relationship between the recurrent laryngeal nerve (rln) and the inferior thyroid artery (ita) was studied in 76 embalmed corpses, 8 females and 68 males. in both sexes, the rln lay more frequently between branches of the ita.; it was found in this position in 47.3% of male corpses and 42.8% of female ones. on the right, rln was found between branches of the ita in 49.3% of the cases, anterior to it in 38.04%, and posterior in 11.26%. on the left, the rln lay between branches of the ita in 44.45%, posterior to the ita in 37.05%, and anterior to it in 18.05% of the cases. in 62.68% of the cases, the relationship found on one side did not occur again on the opposite side. there was a significant difference (p<0.05) in the distribution of the 3 types of relationships between the rln and the ita, on the right and on the left. racial variations could contribute to an explanation of the differences observed by authors of different countries in the relationship between the rln and the ita.
Relationship between the recurrent laryngeal nerve and the inferior thyroid artery: a study in corpses
Campos Bernardo Almeida,Henriques Paulo Roberto Ferreira
Revista do Hospital das Clínicas , 2000,
Abstract: The anatomical relationship between the recurrent laryngeal nerve (RLN) and the inferior thyroid artery (ITA) was studied in 76 embalmed corpses, 8 females and 68 males. In both sexes, the RLN lay more frequently between branches of the ITA.; it was found in this position in 47.3% of male corpses and 42.8% of female ones. On the right, RLN was found between branches of the ITA in 49.3% of the cases, anterior to it in 38.04%, and posterior in 11.26%. On the left, the RLN lay between branches of the ITA in 44.45%, posterior to the ITA in 37.05%, and anterior to it in 18.05% of the cases. In 62.68% of the cases, the relationship found on one side did not occur again on the opposite side. There was a significant difference (p<0.05) in the distribution of the 3 types of relationships between the RLN and the ITA, on the right and on the left. Racial variations could contribute to an explanation of the differences observed by authors of different countries in the relationship between the RLN and the ITA.
Manejo do solo e da irriga o como nova tática de controle de Meloidogyne incognita em feijoeiro
Dutra Marcos Roberto,Campos Vicente Paulo
Fitopatologia Brasileira , 2003,
Abstract: A popula o de Meloidogyne incognita e sua infetividade foram estudadas em parcelas amostradas a zero, dois e 14 dias após o revolvimento do solo com ou sem irriga o, irrigadas sem revolvimento e testemunha. Na amostragem aos dois dias após a instala o do ensaio, ocorreu maior redu o (P<0,01) de juvenis do segundo estádio ( J2) no solo apenas revolvido seguido pelo revolvido e irrigado. A infetividade do inóculo do solo, contudo, foi menor (P<0,01) quando se revolveu e irrigou o solo comparado com aquele apenas revolvido. Aos 14 dias, a menor (P<0,01) popula o de J2 foi observada no solo revolvido e irrigado, seguido do revolvido, e elevada naquele apenas irrigado e na testemunha. A infetividade do inóculo do solo aos 14 dias continuou mais baixa no solo revolvido e irrigado. Aos 45 dias após a semeadura, a popula o de J2 continuou mais baixa (P<0,01) onde o solo foi revolvido e irrigado. O número de ovos por feijoeiro (Phaseolus vulgaris) no campo aos 90 dias também foi mais baixo (P<0,01) no solo revolvido e irrigado. Maior (P<0,01) peso das raízes e da parte aérea dos feijoeiros no campo foi observado em plantas crescidas em solo apenas revolvido, e no revolvido e irrigado A produ o de feij o no solo revolvido e irrigado posteriormente foi quatro vezes maior que a testemunha, porém todos os tratamentos diferiram-se entre si. A irriga o como prática agrícola para aumentar a eficácia do alqueive no controle de fitonematóides tem sido postulada por alguns pesquisadores, mas nunca provada experimentalmente, o que agora foi realizada.
Avalia??o in vitro da eficácia de acaricidas sobre Boophilus microplus (Canestrini, 1887) (Acari: Ixodidae) de bovinos no município de Ilhéus, Bahia, Brasil
Campos Júnior, Dunezeu Alves;Oliveira, Paulo Roberto de;
Ciência Rural , 2005, DOI: 10.1590/S0103-84782005000600025
Abstract: the tick boophilus microplus is the species with the greatest geographical distribution and economic importance for the countries situated at tropical and sub-tropical zones of the planet. in brazil, the northwest region is showed as the most favorable to the cattle infestation. chemical control is an efficient control method employed, but the inadequate handling of acaricides contributed for to the onset of resistant ticks to the available acaricides in the market. the county of ilhéus, at the cocoa's region from bahia, has been increasing the cattle activity instead of the devastated cocoa's plantations. between april and september 2000, in vitro imersion tests were performed with engorged females of b. microplus collected from 30 farms randomly chosen in a group of 96 interviewed at the region. the current study showed the existence of resistance or sensibility of the populations of b. microplus to the contact acaricides commonly used at cattle properties of the region of ilhéus. the four acaricides tested showed the following levels of efficiency: amidin - 30.95%; deltamethrin - 65.04%; cipermethrin / diclorvos - 75.73%; and triclorfon / coumaphos / cyfluthrin - 75.13%.
Avalia??o de linhagens, híbridos F1 e cultivares de piment?o quanto à resistência a Meloidogyne spp.
Peixoto, José Ricardo;Maluf, Wilson Roberto;Campos, Vicente Paulo;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999001200013
Abstract: with the purposes of evaluating f1 hybrids of sweet pepper, together with their parents, for resistance to meloidogyne incognita (races 1, 2, 3 and 4) and m. javanica nematodes, an experiment was conducted in glasshouse conditions in the facilities of pioneer sementes ltda, in ijaci, mg, brazil. a randomized block in split-plot design was used with five plots, composed of four races of m. incognita and one isolate of m. javanica, and 48 subplots, composed of 47 genotypes of sweet pepper and one cultivar of tomato (angela gigante i-5100) as a standard check. five replicates and eight plants in each subplot were used. inoculation was done with 60 eggs/ml of substrate mixture of vermiculite, pinus sp. bark and carbonized rice husk. after 60 days following inoculation, the evaluations were performed. all the cultivars and standard-lines (line 004 and line 006) were susceptible to the races 1, 2, 3 and 4 of m. incognita. all the genotypes of sweet pepper were resistant to m. javanica. almost all of the experimental lines were proved to be resistant to all of the four races of m. incognita. the same occurred to most of the experimental hybrids f1, although the degree of resistance of the hybrids in general was lower than that of their respective resistant parents. it is thus proven to be feasible to utilize f1 hybrids by crossing resistant to susceptible sweet pepper lines to control the nematodes m. incognita and m. javanica through varietal resistance.
ANáLISE DA REGENERA O NATURAL DE ESPéCIES FLORESTAIS EM MATAS CILIARES DE ACORDO COM A DIST NCIA DA MARGEM DO LAGO
José Carlos de Campos,Paulo Roberto Corrêa Landgraf
Ciência Florestal , 2001,
Abstract: O presente trabalho teve como objetivo analisar a ocorrência da regenera o natural de espécies florestais nativas em mata ciliar em diferentes distancias da margem do lago de Furnas. Considerou-se duas amostras, sendo uma com as parcelas localizadas a um metro da margem do lago e a outra distante 36 metros. As plantas foram identificadas, medindo-se os valores de diametro do colo, altura total e densidade. No estrato próximo ao lago, encontrou-se uma densidade de 3770 plantas/ha distribuídas em 34 espécies e 17 famílias, com altura média de 1,15 metros e diametro médio do colo de 0,97 cm. Já na amostra distante do lago encontrou-se uma densidade de 4510 plantas/ha distribuídas em 29 espécies e 17 famílias, com altura média das plantas de 1,43 metros e diametro médio do colo de 1,25 centímetros. Na amostra distante do lago, encontrou-se menor número de espécies, porém com maior densidade e maiores valores de diametro do colo e altura.
Avalia o in vitro da eficácia de acaricidas sobre Boophilus microplus (Canestrini, 1887) (Acari: Ixodidae) de bovinos no município de Ilhéus, Bahia, Brasil
Campos Júnior Dunezeu Alves,Oliveira Paulo Roberto de
Ciência Rural , 2005,
Abstract: O carrapato Boophilus microplus é a espécie de maior distribui o geográfica e importancia econ mica para os países produtores de bovinos em áreas tropicais e sub-tropicais do planeta. No Brasil, a Regi o Nordeste apresenta algumas áreas mais favoráveis para as infesta es do gado. O controle químico ainda é a forma mais eficaz de combate deste ectoparasita, mas o manejo inadequado dos acaricidas tem contribuído com o aparecimento de resistência de popula es aos produtos disponíveis no mercado. O município de Ilhéus, na Regi o Cacaueira da Bahia, vem incrementando sua atividade pecuária em substitui o à lavoura cacaueira devastada. Foram realizados 30 testes de imers o in vitro (biocarrapaticidogramas) com fêmeas ingurgitadas de B. microplus colhidas em propriedades rurais aleatoriamente selecionadas num grupo de 96 entrevistadas na regi o. O estudo revelou a existência de resistência ou sensibilidade de popula es de B. microplus frente aos carrapaticidas de contato mais utilizados nas propriedades de explora o pecuária da regi o de Ilhéus. Os quatro carrapaticidas testados apresentaram as seguintes eficiências médias: Amitraz - 30,95%; Deltametrina - 65,04%; Cipermetrina / diclorvos - 75,73%; e Triclorfon / coumaphos / cyfluthrin - 75,13%.
Efeito do tamanho de partícula e da altura de corte de plantas de milho na dinamica do processo fermentativo da silagem e no período de desensilagem
Neumann, Mikael;Mühlbach, Paulo Roberto Frenzel;N?rnberg, José Laerte;Ost, Paulo Roberto;Lustosa, Sebasti?o Brasil Campos;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000700020
Abstract: the trial aimed to evaluate the effect of particle size (small: from 0.2 to 0.6 cm or large: from 1.0 to 2.0 cm) and cutting height (low cut: 15 cm or high cut: 39 cm) of the corn plant on the dynamics of the silage fermentation process and feed-out period. the treatments were: t1 - small particle size with low cutting height; t2 - large particle size with low cutting height; t3 - small particle size with high cutting height; and t4 - large particle size with high cutting height. a complete randomized blocks design with a factorial arrangement (2 x 2 x 4) in a split-plot was used, with three replications. factors evaluated were particle size (2), cutting height (2), and feed out evaluation periods (4). small particle size improved compaction density and reduced temperature gradient between silage mass and environment and ph value of silage during feed-out. higher deterioration of corn silage occurred at the superior silo stratum, due to temperature elevation and higher ph index and ammoniacal nitrogen compared to inferior stratum.
Deficiência de macronutrientes em estévia: sintomas visuais e efeitos no crescimento, composi??o química e produ??o de esteviosídeo
Utumi, Marley Marico;Monnerat, Pedro Henrique;Pereira, Paulo Roberto Gomes;Fontes, Paulo Cézar Rezende;Godinho, Vicente de Paulo Campos;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000600016
Abstract: this experiment was carried out to describe visual symptoms of macronutrients deficiencies in stevia rebaudiana, and the effects of these deficiencies on growth, chemical composition and stevioside production. the symptoms were: yellowing with -n; dark green leaves with -p; clorotic, mottled, and necrotic leaves, with -k; apical necrosis, with -ca; leaves with clorosis and necrosis in inverted "v" shape, with -mg, and small pale green leaves, with -s. n, k, and mg deficiencies reduced the leaf growth, therefore the plant marketable part. mg deficiency caused greater reduction on the development of the radicular system. n, p, k, and s deficiencies decreasead the shoot:root dry weigth ratio, while mg deficiency increased it. all deficiencies decreased the absorption of macronutrients, except of ca, which reduced only the absorption of ca, and k, that did not affect the absorption of mg and s. the chemical content of the last five fully expanded leaf pairs showed good correlation with the plant nutritional status. the deficiencies of k, ca, and s decreased the concentration of stevioside while all deficiencies, except of p, decreased the stevioside content.
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