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Search Results: 1 - 10 of 14414 matches for " Cláudio;Silveira "
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A forma??o militar-naval Brasil-Argentina no contexto de coopera??o no Atlantico Sul: vis?es sobre a situa??o regional
Silveira, Cláudio de Carvalho;
História (S?o Paulo) , 2010, DOI: 10.1590/S0101-90742010000200003
Abstract: the text is a presentation of how the relationship between brazil and argentina in the last five decades has affected the perception and constitution of the political-strategic marinas in both countries. from a position of rivalry and competition, they opted to the attempts of integration and cooperation in various sectors, including the military-naval one. in this sense, certain significant issues are considered in the implementation of the mercosur and of confidence-building measures along with other neighbors in the south american subcontinent, from the perspective of analysts, civilians and brazilian and argentinian official mariners justifying the advances and limits of the cooperation. and so, it is taken into account the establishment of the defense policy bases and some consequences for the military-naval formation in both countries.
Orius insidiosus (Say, 1832) (Heteroptera, Anthocoridae): sensibilidade ao fotoperíodo e diapausa reprodutiva?
Silveira, Luís Cláudio Paterno;Bueno, Vanda Helena Paes;
Revista Brasileira de Entomologia , 2003, DOI: 10.1590/S0085-56262003000400016
Abstract: the minute pirate bugs, orius spp., are known as predators on several pests as thrips, aphids, spider mites and whiteflies. orius insidiosus is an important thrips predator, commercially used around the world. however, one of the main problems on biological control of thrips in temperate regions is the occurrence of reproductive diapause in orius species. this characteristic promotes the interruption of biological control strategies when predators are exposed to short photoperiods. this research had as objective to evaluate the influence of different photoperiod conditions on eggs/nymphs and adults of o. insidiosus in laboratory. the trials were carried out through the combination of eggs/nymphs and adults reared under the photoperiods 10l:14d; 11l:13d; 12l:12d and 13l:11d, at 25±2oc and 70±10% rh. the predators were maintained during their pre-imaginal development time under one of the photoperiods and, after being emerged as adults transferred to another photoperiod regime. the predator had a tendency to present longer development time under photoperiod 13l:11d. there was no influence of the different photoperiods conditions on the reproduction of o. insidiosus. the females laid eggs normally during all their lifetime. o. insidiosus is not sensitive to photoperiod evaluated and do not enter in reproductive diapause.
Wilson Ferreira de Oliveira,Cláudio Aparecido da Silveira
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v20i1.2585
Abstract: It was installed in 1988 (Nerópolis - GO) an essay for the control of the garlic rust (Puccinia allii), with pulverization of the fungicides mancozeb, triadimenol e triadimefon. The results indicated that all the products tested were efficient in the control of the fungi P. alli. Foi instalado, em 1988 no município de Nerópolis - GO, ensaio visando ao controle da ferrugem do alho (Puccinia allii), através de pulveriza es com os fungicidas mancozeb, triadimenol e triadimefon. Os resultados obtidos indicaram que todos os produtos testados foram eficientes no controle do fungo Puccinia allii.
EFFECT OF FUNGICIDES IN THE CONTROL OF RICE BLAST Pyricularia oryzae AND Helminthosporium oryzae EFEITO DE FUNGICIDAS NO CONTROLE DE BRUSONE (Pyricularia oryzae) E MANCHA PARDA (Helminthosporium oryzae) NO ARROZ
Wilson Ferreira de Oliveira,Cláudio Aparecido da Silveira
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v20i1.2590
Abstract: The effect of the fungicides ethiltrianol and edifenphos was evaluated, on level of field, aiming control rice blast (Pyricularia oryzae and Helminthosporium oryzae) in variety IAC - 47. The fungicides were pulverized one or two times in different concentrations in the stage of panicles emission. The results showed that, as to infection level in the panicles, grain lesions and productivity there was no significant statistical difference between treatments. Refering to infection level in the banner leaves, there was significant statistical difference between treatments and the control. Foi avaliado, a nível de campo, o efeito dos fungicidas ethiltrianol e edifienphos no controle de brusone (Pyricularia oryzae Cav. e Helminthosporium oryzae Breda de Haan) na cultura do arroz, variedade IAC - 47. Os fungicidas foram pulverizados uma ou duas vezes, em diferentes concentra es a partir da emiss o das panículas. Os resultados apurados indicaram que quanto a les es nas panículas, nos gr os e produtividade, n o houve diferen a significativa entre os tratamentos. Com rela o ao parametro les es nas folhas bandeiras houve diferen a entre todos os tratamentos com fungicidas e a testemunha.
Wilson Ferreira de Oliveira,Cláudio Aparecido da Silveira
Pesquisa Agropecuária Tropical , 2007, DOI: 10.5216/pat.v20i1.2584
Abstract: The fungicides benomyl (200 g.a.i./100 kg seeds), iprodione (200 g.a.i./l00kg seeds) and pencycuron (62.5 g.a.i./100 kg seeds) were evaluated, under greenhouse conditions on controlling Rhizoctonia solani Kuhn, in seed potato, with variety Desirée. The evaluation of the germination percentage and damping-off, at 25 days of age, showed that the best treatment was presented through the use of penycuron, but this fungicide had no significant difference in relation to iprodione treatment. Os fungicidas benomyl (200 g.i.a./100 kg sementes), iprodione (200 g.i.a./100 kg sementes) e pencycuron (62,5 g.i.a./100 kg de sementes) foram testados, em condi es de telado, no controle de Rhizoctonia solani Kuhn., em batata semente da cultivar Desirée. A avalia o da percentagem de emergência damping-off aos 25 dias após o plantio, demonstrou que os fungicidas pencycuron e iprodione foram os melhores, com vantagens para o primeiro, porém sem diferirem entre si significativamente.
Family Farming, Land Use and Sustainability in the Amazon: Focusing on the Educational Dimension  [PDF]
Raimundo Cláudio Gomes Maciel, Francisco Diétima da Silva Bezerra, Francisco Carlos da Silveira Cavalcanti, Oleides Francisca de Oliveira, Pedro Gilberto Cavalcante Filho
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.91009
Abstract: The struggles?for land possession and deforestation were some results of the recent occupation process in the Amazon. Family farming was the target of land policies in the region, with recurring failures. Issues related to land governance and pro-poor policies have returned to the discussions, especially by the food production. This study aims to evaluate the relationship between the educational level, land access and sustainable land use among farmers in Acre State, Brazil, in the periods 1996/1997 and 2006/2007. Based on a sample, the methodology worked with variables related to the educational level, the access and the use of land, economic results and solid garbage. The results show that the higher educational level is directly related to the land access security and inversely proportional to sustainability in the land use type. Furthermore, production difficulties are leading to greater market dependence and, consequently, to increased generation of solid garbage, whose disposal may be better directed by improving the farmers’ education.
Estimativa das propriedades de flex?o estática de seis espécies de madeiras amaz?nicas por meio da técnica n?o-destrutiva de ondas de tens?o
Del Menezzi, Cláudio Henrique Soares;Silveira, Rafael Rocha;Souza, Mário Rabelo de;
Acta Amazonica , 2010, DOI: 10.1590/S0044-59672010000200011
Abstract: the utilization of non-destructive testing (ndt) can augment the technological information about well-known wood species, as well as those which have not yet been investigated. the main advantage is that ndt methods are fast, and many measures can be undertaken to improve the confidence level of the evaluation. in this context, the paper aims to study the feasibility of the stress wave method to estimate flexural properties of six brazilian tropical woods. the species were chosen according to density: balfourodendron riedelianum, cedrela fissilis, cordia goeldiana, bowdichia virgilioides, dipteryx odorata and tabebuia sp. twenty samples from each species were cut and tested according to astm d143-94 (2000) to determine flexural properties, totaling 120 samples. before mechanical testing, the samples were non-destructively tested by using the stress wave method, and their dynamic modulus of elasticity (ed) and wave velocity (wv) were determined. stepwise multiple linear regression analysis was run to select the best variables for estimating the flexural properties. according to the results, the models generated had higher values of r2. thus, it can be concluded that the stress wave method is suitable for predicting flexural properties where there is wood variability, for instance among species. on the other hand, when the variability is low, for instance within wood species, the models generated had low predictability.
Diterpenes from Erythroxylum barbatum
Santos, Cláudio C. dos;Lima, Mary Anne S.;Braz Filho, Raimundo;Silveira, Edilberto R.;
Journal of the Brazilian Chemical Society , 2006, DOI: 10.1590/S0103-50532006000700016
Abstract: two new diterpenes ent-rosan-1-one-5a,15x,16-triol (1) and ent-11a-acetoxy-devadarane-15x,16-diol (2) were isolated from roots of erythroxylum barbatum, in addition to the known diterpenes ent-devadarane-15x,16-diol (erythroxydiol x, 3) and procesterol. investigation of the trunk heartwood furnished the ent-devadarane-11a,15x,16-triol (erythroxytriol q, 4), ent-devadarane-7b,15x,16-triol (hydroxydevadarool, 5), b-sitosterol and its glucoside. structural characterization, including the relative stereochemistry of all compounds, was established on the basis of spectroscopic methods, particularly 1d and 2d nmr, and comparison with data from literature.
Bragantia , 1998, DOI: 10.1590/S0006-87051998000100012
Abstract: the effect of corn genotypes upon food preferences of spodoptera frugiperda larvae was evaluated. the genotypes selected were: iac701 n, an inbred line of instituto agron?mico de campinas (iac), state of s?o paulo, brazil; 'iac7777', a single hybrid of iac in which the above inbred line is one of the parents; mp707, an inbred line of mississippi state university considered to be resistant to s. frugiperda; and zapalote chico (zc), a central american corn race referred as resistant to helicoverpa zea and s. frugiperda. the tests were run in arenas with free choice among treatments. the test with 1st instar larvae indicated that the insects preferred to feed on the genotypes iac701 n and iac7777, and a lower percentage of larvae stablished on the leaves of zc and mp707. the test with 5th instar larvae indicated a non-preference of the larvae for the leaves of genotypes mp707 and zc while iac701 n was the most preferred with more leaf area consumed. the non-preference for feeding tests leaded to the conclusion that this type of resistance is present in zc and mp707. these results confirm previous data in the literature.
Desenvolvimento ponderal de bovinos meio-sangue Ibagé- Hereford nascidos em distintas esta??es do ano
Machado Júnior, Paulo Cláudio;Salomoni, Eduardo;Osório, José Carlos da Silveira;
Ciência Rural , 1999, DOI: 10.1590/S0103-84781999000200023
Abstract: the aim of this work was to study the influence of calving seasons (spring and autumn), upon growth rate of ibagé x hereford crosses (f1) under natural pasture grazing conditions, at the centro de pesquisa de pecuária dos campos sulbrasileiros, of empresa brasileira de pesquisa agropecuária, in bagé, rio grande do sul state, brazil. seventy four animals (44 born in spring and 30 in autumn) were used, weighed at 90 days intervals from birth up to the age of 1080 days. the highest body weights were observed for animals born in autumn at birth, 360, 630, 720 and 1080 (p <0.01) and, at 990 days of age (p <0.05), while the animals born in spring were heavier at the ages of 180, 540 and 900 (p <0.01) and, 450 and 810 days (p <0.05).
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