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Search Results: 1 - 10 of 195147 matches for " Fadigas Francisco de Souza "
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Rational management of tobacco (Nicotiana tabacum L.) crop residues to obtain organic compost Manejo racional de resíduos da cultura do fumo (Nicotiana tabacum L.) para obten o de composto organico
Dário Costa Primo,Francisco de Souza Fadigas,José Carlos Ribeiro Carvalho,Carlos Daniel Seifert Schmidt
Semina : Ciências Agrárias , 2011,
Abstract: Crop residues may be used to produce organic composts for agricultural use. The aim of this study was to evaluate the effect of two inoculums on the decomposition speed of tobacco residues (stems). The experiment was carried out in a completely randomized design, with three treatments and six replications. The residue used in the study was passed through a forage chopper and mixed to the inoculums in a concrete truck mixer. The treatments evaluated were: TF + EB + RB - tobacco residue, bovine manure and bovine rumen; TF + EB + MP - tobacco residue, bovine manure and Microsept-Dust and TF + EB - tobacco residue and bovine manure. The temperature and humidity of the piles were monitored weekly. The piles were initially turned up side down every seven days, and then every fourteen days till closing 60 days. Samples for chemical analysis of the composted material were collected at 30, 60 and 90 days after the beginning of the composting process. The temperature of the piles stayed around 57 to 60 oC in the period between the 20 to 40 days after the beginning of the composting process. The mix containing cattle rumen (RB) presented the lowest temperature after forty days. At the end of the composting the mix containing Microsept-Dust (MP) presented the lowest humidity. The C/N relation of the composts obtained was around 10/1 and 11/1. The three treatments presented pH values close to the neutrality in the mature stage. A period of sixty days seems to be sufficient to obtain a mature and stable biocompost of tobacco waste using manure independent of the addition of inoculums. Os resíduos vegetais podem ser utilizados na produ o de adubo organico por meio da compostagem. O objetivo deste estudo foi avaliar o efeito de dois inoculantes sobre a velocidade de decomposi o do resíduo da cultura do fumo. O experimento foi conduzido em delineamento inteiramente casualizado, com três tratamentos e seis repeti es, sendo o resíduo picado em picadeira e misturado aos inoculantes em betoneira. Foram avaliados os tratamentos: TF + EB + RB - talo de fumo, esterco bovino e rúmen bovino; TF + EB + MP - talo de fumo, esterco bovino e microsept-pó e TF + EB - talo de fumo e esterco bovino. A temperatura e a umidade das pilhas foram monitoradas semanalmente. As pilhas foram revolvidas a cada 07 dias, inicialmente e a seguir a cada 14 dias até os 60 dias. Aos trinta, sessenta e noventa dias, foi feita a coleta, para análise química, do material em compostagem. Entre vinte e quarenta dias as pilhas mantiveram temperatura entre 57 e 60 oC. A mistura contendo rúmen bovino (RB) a
Interferência do acido ascórbico na determina??o de a?úcares redutores pelo método de Lane e Eynon
Tavares, José Torquato de Queiroz;Cardoso, Ricardo Luis;Costa, Jo?o Albany;Fadigas, Francisco de Souza;Fonseca, Ant?nio Augusto;
Química Nova , 2010, DOI: 10.1590/S0100-40422010000400008
Abstract: two studies, both set up as completely randomized design, in a 5x5 and 7x5 factorial schemes, evaluated the interference of 5 and 7 ascorbic acid concentrations and 5 glucose or 5 sucrose concentrations, respectively, on the determination of total and reducing sugars by lane and eynon method. the ascorbic acid reducing power (aarp) over the fehling liquor interfered in the results of total and reducing sugars. on average the aarp was equivalent to 74.83 and 69.71% of the reducing power of glucose and of hydrolyzed sucrose, respectively. the ascorbic acid was stable in all study conditions.
Concentra es naturais de metais pesados em algumas classes de solos brasileiros
Fadigas Francisco de Souza,Amaral-Sobrinho Nelson Moura Brasil do,Mazur Nelson,Anjos Lúcia Helena Cunha dos
Bragantia , 2002,
Abstract: No Brasil ainda n o foram definidos os níveis de referência de metais pesados, para avalia o da contamina o do solo. Objetivou-se com este trabalho caracterizar diversos solos brasileiros, em condi es naturais, quanto aos teores totais dos metais pesados Cd, Cr, Cu, Fe, Mn, Ni, Zn e correlacionar algumas propriedades do solo com a ocorrência desses elementos. Utilizaram-se 162 amostras de solo, da soloteca da Embrapa Solos (RJ), correspondendo aos horizontes A e B de 81 perfis, das principais classes de solos brasileiros, especialmente os Argissolos (27%) e Latossolos (42%). Os teores totais de metais pesados extraídos com água-régia foram analisados em ICP-AES. à exce o do cádmio, as concentra es médias dos metais estudados foram, em geral, inferiores aos valores médios encontrados na literatura internacional, e inferiores aos valores desses metais considerados tóxicos para as plantas. As amostras de solo foram agrupadas por semelhan a, utilizandose como variáveis os conteúdos de argila, silte, Mn e Fe e CTC (T). Estabeleceram-se as faixas de concentra es das variáveis de solos nos diversos grupos e uma aproxima o dos teores naturais dos metais pesados para outras amostras de solos com características similares às de cada grupo.
Concentra??es naturais de metais pesados em algumas classes de solos brasileiros
Fadigas, Francisco de Souza;Amaral-Sobrinho, Nelson Moura Brasil do;Mazur, Nelson;Anjos, Lúcia Helena Cunha dos;Freixo, Alessandra Alexandre;
Bragantia , 2002, DOI: 10.1590/S0006-87052002000200008
Abstract: the heavy metals background levels for evaluation of a possible contamination are still not defined in brazilian soils. the objective of this study was to measure the content of the heavy metals cd, cr, cu, fe, mn, ni, zn, in several brazilian soils, under natural conditions, and to correlate some soil properties with the occurrence of these elements. soil samples from embrapa soils' (rj) collection were used (162 in total), corresponding to a and b (or c) horizons from 81 profiles, of the main classes of brazilian soils, especially ultisols (argissolos) 27% and oxisols (latossolos) 42%. heavy metal levels were determined using an icpaes, after extraction with acqua regia. the average metal concentrations were below average values reported in the literature for soils found abroad, with exception to cd. they were also lower than values considered toxic to plants, including cd values. soil samples were clustered by similarity, based on the variables content of clay, silt, mn, and fe, and value of soil cec (t value). this enabled separation of the soil samples in seven groups which have distinct ranges for the soil variables contents, which allowed an estimation of the heavy metals background levels for soil samples with characteristics within the range of each group.
Information and Knowledge Flows in the Network of the Education through Work for Family Health Program  [PDF]
Ana áurea Alécio de Oliveira Rodrigues, Claudia Ribeiro Santos Lopes, Eliane Santos Souza, Inácio de Sousa Fadigas, Hernane Borges de Barros Pereira
Social Networking (SN) , 2014, DOI: 10.4236/sn.2014.32015
Abstract:

The Education through Work for Family Health Program (PET Saúde, in Portuguese) created by the Ministries of Education and Health is a proposal to integrate service, learning and community. The goal of PET Saúde is to foster the formation of learning groups within the Family Health Strategy scope. While being studied at the city of Feira de Santana, the program was structured with one coordinator and eleven tutorial groups, distributed in 27 family health offices, which constituted a social network where the construction and knowledge diffusion occur. This article proposes the analysis of the information and knowledge flows of this network through the social networks analysis. This study highlights the play of PET Saúde’s coordinator in the processes of organization and articulation as central vertex of the network, and some scholars in the articulation of different tutorial groups. The results show a fragmentation in the PET Saúde network when the coordinator vertex is removed, whereas 5 components are generated where 4 tutorial groups appear isolated.

Background levels of some trace elements in weathered soils from the Brazilian Northern region
Fadigas, Francisco Souza;Amaral Sobrinho, Nelson Moura Brasil do;Anjos, Lucia Helena Cunha dos;Mazur, Nelson;
Scientia Agricola , 2010, DOI: 10.1590/S0103-90162010000100008
Abstract: soils formed from the barreiras group sediments, located mainly along the coast of brazil northern and northeastern regions, generally present low concentrations of iron oxides and total organic carbon, high quantities of quartz in the sand fraction, and kaolinitic clay mineralogy. the objective of the present study was to quantify the pseudo total concentrations of cd, co, cu, cr, mn, ni, zn and fe in xhantic udox and xhantic udult soils derived from these sediments. the reference sites were covered by native vegetation and located in the states of pará and amapá, brazil. multiple linear regression analysis was applied to determine correlations between soil parameters and the levels of these metals. the best correlation was obtained between fe, mn, clay, and silt contents, and cd, co, cu, zn, cr, ni. a correlation between ph and these metal levels was not found. clay and sand contents showed a negative inverse correlation with the metal levels,of same magnitude but with a different sign; this was the reason for excluding one of the parameters in the regression model. in general, the contents of the elements were lower than those found in soils formed from other parent materials. the mn content was included in the model of multiple linear regression for cd and co, due to its association with these last metals. silt level showed to have a significant influence in the equations for cr and co, which is attributed to the presence of clay minerals and fe and mn oxides in ferruginous and clay aggregates of silt size. the equations obtained in this paper, are useful to predict, in general terms, the amounts of those heavy metals in an unknown soil sample, if the soil material were not contaminated or affected by land usage. thus, they may be applied to evaluate soil contamination by the studied heavy metals.
Flooding effects in seedlings of Cytharexyllum myrianthum Cham. and Genipa americana L.: responses of two neotropical lowland tree species
ANDRADE ANT?NIO CARLOS SILVA DE,RAMOS FLAVIO NUNES,SOUZA ALEXANDRE FADIGAS DE,LOUREIRO MARTA BRUNO
Brazilian Journal of Botany , 1999,
Abstract: Six-month-old seedlings of Cytharexyllum myrianthum and Genipa americana, two common tree species in different flood-prone areas in Brazil, were flooded for up to 90 days to compare their survival and growth responses under these conditions. Seedlings of both species were found to be relatively tolerant to flooding but growth responses changed according to treatment and plant species. Growth of G. americana was reduced by flooding, showing a decrease in root and leaf dry mass, root/shoot ratio and height, without showing any adaptive morphological changes. On the other hand, growth of C. myrianthum seedlings was stimulated under flooding conditions, showing an increase in root dry mass, root/shoot ratio, height, stem diameter and some morphological changes in roots and stems, i.e., development of new roots and stem base hypertrophy. These results could be regarded as an experimental corroboration of the field observations, showing that these species could be indicated for restoration programs of some Neotropical wetlands.
Desenvolvimento de Heliconia psittacorum e Gladiolus hortulanus irrigados com águas residuárias tratadas
Cerqueira, Lousane L.;Fadigas, Francisco de S.;Pereira, Francisco A.;Gloaguen, Thomas V.;Costa, Jo?o A.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2008, DOI: 10.1590/S1415-43662008000600006
Abstract: this research aims to evaluate the impact of irrigation with treated domestic wastewater (tdw) on the growth of ornamental plant species. the experiment was installed in the town of sim?es filhos (ba), in a randomized block design with sub-divided plots, cultivated with heliconia psittacorum and gladiolus hortulanus using surface drip irrigation with tdw and river water. the evaluated parameters were: stem length, button number (parakeet flower and gladiola), and plant height, number of tillers, plant diameter and nutriment content (only parakeet flower). among the factors which affect the growth of the plant, soil porosity and soil salinity (electrical conductivity - ec) were measured for 0 to 0.3 m soil depth. no significant difference was observed for the plant morphology. changes in soil micro and macroporosity, ec and sodicity after 180 days of irrigation were also insignificant. however, a beginning of soil salinization was found after one year of experimentation, which signifies a possible change in the monitored parameters in the medium to long term.
Flooding effects in seedlings of Cytharexyllum myrianthum Cham. and Genipa americana L.: responses of two neotropical lowland tree species
ANDRADE, ANT?NIO CARLOS SILVA DE;RAMOS, FLAVIO NUNES;SOUZA, ALEXANDRE FADIGAS DE;LOUREIRO, MARTA BRUNO;BASTOS, RODRIGO;
Brazilian Journal of Botany , 1999, DOI: 10.1590/S0100-84041999000500009
Abstract: six-month-old seedlings of cytharexyllum myrianthum and genipa americana, two common tree species in different flood-prone areas in brazil, were flooded for up to 90 days to compare their survival and growth responses under these conditions. seedlings of both species were found to be relatively tolerant to flooding but growth responses changed according to treatment and plant species. growth of g. americana was reduced by flooding, showing a decrease in root and leaf dry mass, root/shoot ratio and height, without showing any adaptive morphological changes. on the other hand, growth of c. myrianthum seedlings was stimulated under flooding conditions, showing an increase in root dry mass, root/shoot ratio, height, stem diameter and some morphological changes in roots and stems, i.e., development of new roots and stem base hypertrophy. these results could be regarded as an experimental corroboration of the field observations, showing that these species could be indicated for restoration programs of some neotropical wetlands.
Germina o de sementes de jenipapo: temperatura, substrato e morfologia do desenvolvimento pós-seminal
ANDRADE ANT?NIO CARLOS SILVA DE,SOUZA ALEXANDRE FADIGAS DE,RAMOS FLAVIO NUNES,PEREIRA T?NIA SAMPAIO
Pesquisa Agropecuária Brasileira , 2000,
Abstract: O presente trabalho teve como objetivos definir o tipo de substrato e a temperatura mais adequados à germina o de sementes de jenipapo (Genipa americana L.), conhecer a morfologia das sementes e seu desenvolvimento pós-seminal, caracterizando as plantulas normais, o tipo de germina o e os padr es de anormalidade. Para tanto, realizou-se um experimento colocando-se as sementes sobre os seguintes substratos: papel, vermiculita e solo, nas temperaturas constantes de 20°C, 25°C, 30°C, e 35°C e alternada de 20°C-30°C. O delineamento estatístico empregado foi o inteiramente casualizado (5 x 3), com quatro repeti es de 50 sementes. Foram analisados os parametros germina o normal (%) e velocidade de germina o. Os melhores resultados foram obtidos nas temperaturas constantes de 25°C, 30°C e 35°C, e nos substratos vermiculita e solo.
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