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Search Results: 1 - 10 of 192714 matches for " Vicente de Paulo Campos;Lanza "
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BRS 335: a midseason high-yielding upland cotton cultivar for northeast brazilian savanna
Morello, Camilo de Lelis;Pedrosa, Murilo Barros;Suassuna, Nelson Dias;Chitarra, Luiz Gonzaga;Lamas, Fernando Mendes;Silva Filho, Jo?o Luis;Andrade, Francisco Pereira de;Barroso, Paulo Augusto Vianna;Ribeiro, José Lopes;Godinho, Vicente de Paulo Campos;Lanza, Marcelo Abreu;
Crop Breeding and Applied Biotechnology , 2012, DOI: 10.1590/S1984-70332012000300011
Abstract: cotton cultivar brs 335 is a midseason high-yield cultivar and has adaptation to the northeast brazilian savanna, yield stability, desirable resistance to main cotton diseases and good fiber quality. the cultivar brs 335 meets growers' demands for competitive lint yield as well as fulfilling industrial textile requirements.
BRS 336: a high-quality fiber upland cotton cultivar for Brazilian savanna and semi-arid conditions
Morello, Camilo de Lelis;Pedrosa, Murilo Barros;Suassuna, Nelson Dias;Lamas, Fernando Mendes;Chitarra, Luis Gonzaga;Silva Filho, Jo?o Luis;Andrade, Francisco Pereira;Barroso, Paulo Augusto Vianna;Ribeiro, José Lopes;Godinho, Vicente de Paulo Campos;Lanza, Marcelo Abreu;
Crop Breeding and Applied Biotechnology , 2012, DOI: 10.1590/S1984-70332012000100012
Abstract: cotton cultivar brs 336 is a high-quality fiber upland cultivar and has wide adaptation to the brazilian growing areas, with resistance to bacterial blight. brs 336 exhibited fiber length higher than 32.0 mm in all field tests. also, fiber strength exceeded all upland cotton currently grown in brazil.
Evaluation of reproductibility and detection limit of CaSO4: dy radiation detectors
Manzoli, José Eduardo;Campos, Vicente de Paulo de;Doi, Mirian Saori;
Brazilian Archives of Biology and Technology , 2006, DOI: 10.1590/S1516-89132006000200009
Abstract: measurement response of thermoluminescent dosimeter, tld, used by workers or placed at positions where gamma radiation field could be in action affecting biological tissues, should be completely characterized, in order to achieve the radiation quantity with precision and confidence. among the evaluations concerned to its characterization, the detector reproductibility is of fundamental importance, because detectors present inside the tld will be used many times in routine. reproductibility is studied by repeated exposure to the same radiation field. the minimum detection limit is another important characteristics of a tld. in this work evaluations of reproductibility and minimum detection are presented, for dosimeters produced at ipen.
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.
Volatiles produced by interacting microorganisms potentially useful for the control of plant pathogens
Campos, Vicente Paulo;Pinho, Renata Silva Canuto de;Freire, Eduardo Souza;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000300001
Abstract: the results of studies about interactions between microorganisms involving at least one plant pathogen are of interest to the areas of ethiology and control in plant pathology. various aspects of these interactions have been studied over the years but the toxicity of volatile organic compounds (vocs) has been emphasized only recently, developing techniques and procedures, and producing additional knowledge to those already obtained with water-soluble substances. this new facet of these interactions based on vocs is discussed in this review involving mainly fungi, bacteria and nematodes pathogenic to plants. also discussed is the role of vocs produced by microorganisms, especially fungi and bacteria, in soil fungistasis and the effect of vocs on fungal agents used in the control of plant parasitic nematodes. the evidence of vocs broadens the research studies about these interactions. however, the scarcity of the research results in this area show up gaps which need to be filled and some research proposals are discussed. the present and future accumulated voc knowledge will perhaps be beneficial to farmers, especially aspects related to increasing soil suppressiveness to plant disease and to the finding of analog molecules of vocs highly effective against plant pathogens.
Efeito de indutores de resistência sobre Meloidogyne exigua do cafeeiro
Salgado, S?nia Maria de Lima;Resende, Mário Lúcio Vilela;Campos, Vicente Paulo;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000400010
Abstract: the parasitism of coffee roots by meloidogyne exigua goeldi, 1887, widespread nematode in the main producing regions, can provoke a series of modifications in the normal development of the plant. the induction of resistance for the activation of existing latent mechanisms of defense in plants represents a potentially useful alternative for the management of m. exigua in coffee plantations. in a first assay, the present work aimed at evaluating hatching and mortality of second stage juveniles (j2) of m. exigua in solutions of acibenzolar-s-metil (asm, bion?) and salicylic acid (sa) at the dosages of 0.2, 0.35 and 0.5 g. of a. i./l and supa-potássio? (potassium silicate), hortifós? pk (potassium phosphite) at the dosages 5.0; 7.5 and 10.0 ml/l, using water and aldicarb as control. the effect of asm (0.2 g of a.i./l) was also evaluated by foliar and drench applications at 7 days before inoculation and at 2 and 7 days after inoculation of 7000 eggs of m. exigua/plant. the hatching of m. exigua j2 was inhibited in potassium silicate and in salicylic acid solutions independent of the used dosage, while j2 hatching in asm and water was equal and significantly lower than j2 hatching verified in potassium phosphite. the mortality of j2 in sa was next to 100% and equal to the observed in aldicarb (500 ppm). the remaining products caused the same mortality of j2, however lesser than the observed in water. at ninety days of the inoculation of m. exigua on seedlings, the final population (number of eggs + j2), number of galls, reproduction factor (final population/initial population) and fresh weight of roots of plants treated with asm did not differed significantly from control (inoculated plants).
Efeito do armazenamento na energia corporal de juvenis do segundo estádio de Meloidogyne incognita infestados por Pasteuria penetrans
Rocha, Fernando da Silva;Campos, Vicente Paulo;Canuto, Renata da Silva;Souza, Ricardo Magela de;
Summa Phytopathologica , 2009, DOI: 10.1590/S0100-54052009000100002
Abstract: this work aimed to study the effect of storage period on lipid content of second stage juveniles (j2) of m. incognita with endospores of p. penetrans on infectivity and reproduction in tomato. suspensions of m. incognita containing or not endospores of p. penetrans adhered to cuticle were stored by 0, 3, 6, 9 and 12 days at 28oc. after each storage period, the concentration of neutral lipids in the body of j2 was determined by image analysis of j2 stained with "oil red o". after that, 1.000 j2 were inoculated in tomato seedlings. after 28 days, the number of infected females, number of endospores per females, number of galls, number of egg masses and number of eggs per gram of root were evaluated. the lipid content of j2 reduced with the increase of storage period. however, greater lost occurred on j2 without endospores of p. penetrans. the ratio between j2 lipid losses with and without p. penetrans was small and decreased with storage period. however, the ratio between j2 with and without p. penetrans was greatest between 3 and 6 days of storage in relation to parameters reproduction and number of galls, indicating consumption of alternative energy sources others than neutral lipids by infected j2. but the storage period always reduced the reproduction and number of galls formed in tomatoes by j2 with and without p. penetrans. the loss of those energy sources indicate that many j2 dye before adult stage, because the number of parasitized females reduced with storage, besides of smaller endospores production per female. the j2 infested by p. penetrans needs to find the root quickly and should not stay in the soil for more than 6 days before parasitizing the plant.
Adaptabilidade e estabilidade de cultivares de soja em cinco épocas de plantio no cerrado de Rond nia
Prado Eloi Elias do,Hiromoto Dario Minoru,Godinho Vicente de Paulo Campos,Utumi Marley Marico
Pesquisa Agropecuária Brasileira , 2001,
Abstract: Este trabalho teve o objetivo de avaliar o desempenho, a estabilidade e a adaptabilidade de 21 cultivares de soja (Glycine max (L.) Merrill), em cinco épocas de plantio no cerrado de Rond nia. O delineamento experimental foi blocos ao acaso, com três repeti es. Os ensaios foram conduzidos no ano de 1996/97 pelo Centro de Pesquisa Agroflorestal de Rond nia, no Campo Experimental de Vilhena em Rond nia, RO. Os métodos utilizados apresentaram concordancia entre os resultados alcan ados, sendo que o comportamento das cultivares nas diferentes épocas de semeadura pode ser representado por um modelo linear. O coeficiente de resposta linear beta1i n o apresentou diferen a significativa (P<0,05) da unidade pelo teste t (beta1i = 1) em todas as cultivares testadas. As cultivares que apresentaram desvios de regress o sigma2(d i) significativos (P<0,05) foram MT/BR50 e EMBRAPA 31, com R2 = 58,56% e 74,43%, respectivamente. As demais cultivares n o apresentaram desvios de regress o significativos.
Adaptabilidade e estabilidade de cultivares de soja em cinco épocas de plantio no cerrado de Rond?nia
Prado, Eloi Elias do;Hiromoto, Dario Minoru;Godinho, Vicente de Paulo Campos;Utumi, Marley Marico;Ramalho, André Rostand;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001000400005
Abstract: the objetive of this study was to evaluate the stability and adaptability of soybean (glycine max (l.) merrill) cultivars in five different planting dates. the tests were composed by 21 cultivars outlined in a random blocks design, with three replicates, conduced in 1996/97 by embrapa-centro de pesquisa agroflorestal de rond?nia, in a field of vilhena, ro, brazil. the used methods showed accordance between the achieved results, being the behavior of cultivars in different times of sowing represented by a linear model. the coefficient of linear regression b1i did not show any significant difference of the unit by the t test for all the tested cultivars (p<0.05). the cultivars which presented significant regression deviation s2(di) (p<0.05) were mt/br50 e embrapa 31, r2 = 58.56% e 74.43%, respectively. the other cultivars did not present any significant regression deviation.
Isolamento e Caracteriza o de Bactérias do Lodo de Esgoto com Potencial Antagonismo a Nematóides / Isolation and Characterization of Bacteria from Sewage Sludge, with Potential Antagonism to Nematodes
Cacilda Márcia Duarte Rios Faria,Vicente Paulo Campos,Ricardo Magela de Souza,Fátima Maria Souza Moreira
Ambiência , 2006,
Abstract: Foram isoladas e caracterizadas bactérias presentes no lodo de esgoto visando à realiza o de estudos futuros de intera o desses organismos com fitonematóides. Os lodos utilizados s o provenientes das esta es de tratamento de Franca e Barueri, no Estado de S o Paulo. Foram obtidos 77 isolados do lodo de Franca e 143 do de Barueri. Desses isolados de Franca testados, 77% foram Gram-positivos e 23% Gram-negativos. Para os 143 isolados obtidos do lodo de esgoto de Barueri, 61% foram Gram-positivos e o restante Gram-negativo. Os isolados Gram-positivos podem, estar relacionados com espécies do gênero Bacillus dos quais várias espécies têm grande importancia como agentes de controle de fitopatógenos, inclusive nematóides. Observou-se que 39% e 40% dos microrganismos Gram positivos, isolados dos lodos coletados na ETE de Franca e de Barueri, produziram pigmento fluorescente em meio King B, sendo indicativo de Pseudomonas fluorescens. Dos 77 isolados de Franca, 13% apresentaram como característica morfológica bordo lobado, característica de culturas de Bacillus. Comparando-os com os testes bioquímicos, concluiu-se que 80% deles foram Grampositivos, característica de espécies de Bacillus. Dos isolados, 10% apresentaram bordo inteiro, col nia brilhante e arredondada, as quais s o características de Pseudomonas. Desses, 37% foram Gram-negativos, sendo que 67% desses isolados eram também produtores de pigmento fluorescente em meio King B, características da P. fluorescens. Dos 143 isolados de Barueri, 17% apresentaram bordo lobado como característica morfológica, podendo-se suspeitar de serem espécies de Bacillus e 5% apresentaram as características de espécies de Pseudomonas. Para os isolados do lodo de Barueri, na compara o com os testes bioquímicos constatou-se que 64% dos isolados foram Gram-positivo. Dos isolados com características de Pseudomonas, 17% apresentaram-se como Gramnegativas e desses, 17% mostraram-se como produtores de pigmento fluorescente em meio King B, que s o características de espécies de Pseudomonas do grupo fluorescente.
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