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Search Results: 1 - 10 of 156789 matches for " Gustavo F. Coelho "
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The use of Crambe abyssinica seeds as adsorbent in the removal of metals from waters Uso de sementes de Crambe abyssinica como adsorvente na remo o de metais de águas
Affonso C. Gon?alves Jr.,Fernanda Rubio,Ana P. Meneghel,Gustavo F. Coelho
Revista Brasileira de Engenharia Agrícola e Ambiental , 2013,
Abstract: This study aimed to evaluate the efficacy of crambe seeds (Crambe abyssinica Hochst) as adsorbent material in the removal of the toxic metals cadmium, lead and chromium from contaminated solutions. The byproduct was obtained from oil extraction of crambe seeds in a Soxhlet system. In kinetic tests, the adsorbent masses had varied in solutions containing the metals under pH 5.0 and 7.0. Metal concentrations were determined by flame atomic absorption spectrometry (FAAS). According to optimal conditions found, the adsorption assays were performed for obtaining the isotherms of each metal, which were linearized in agreement with the mathematical models of Langmuir and Freundlich. According to the obtained results, the adsorbent was effective in removing the assessed metals in aqueous solutions, being feasible its employment as an alternative material for the adsorption of metals, besides being a byproduct, which has undergone no prior treatment. Objetivou-se, neste trabalho, avaliar a eficácia do uso das sementes de crambe (Crambe abyssinica Hochst) como material adsorvente na remo o dos metais pesados tóxicos cádmio, chumbo e cromo de solu es contaminadas. Obteve-se a torta a partir da extra o do óleo das sementes de crambe em sistema tipo Soxhlet. Nos testes cinéticos as massas do adsorvente variaram em solu es contendo os metais em condi es de pH 5.0 e 7.0. As concentra es dos metais foram determinadas por espectrometria de absor o at mica modalidade chama (EAA/chama). De acordo com as condi es ótimas encontradas ensaios de adsor o foram realizados para a constru o das isotermas de cada metal as quais, por sua vez, foram linearizadas conforme os modelos matemáticos de Langmuir e Freundlich. Com base nos resultados obtidos concluiu-se que o adsorvente foi eficaz na remo o dos metais estudados em solu es aquosas, sendo viável sua utiliza o como material alternativo para adsor o dos metais pesados, além de se tratar de um coproduto que n o sofreu tratamento prévio algum.
Doen as cardiovasculares ateroscleróticas, dislipidemias, hipertens o, obesidade e diabetes melito em popula o da área metropolitana da regi o Sudeste do Brasil. III - Hipertens o
Salas Martins Ignez,Marucci Maria de Fátima Nunes,Velásquez-Meléndez Gustavo,Teixeira Coelho Leda
Revista de Saúde Pública , 1997,
Abstract: OBJETIVO: Analisar a prevalência da hipertens o, segundo sexo e grupo etário, em grupamentos sociais, estabelecidos de acordo com critérios socioecon micos e caracterizadar as prevalências, segundo tipo de ocupa o. MATERIAL E MéTODO: A amostra utilizada, formada por 1.041 indivíduos de ambos os sexos, maiores de 20 anos, corresponde à soma das amostras representativas de "áreas de estudo", estabelecidas por critérios socioecon micos e geográficos, levando-se em conta a forma de inser o do grupo no meio urbano. Foram definidos estratos sociais, obedecendo um gradiente de níveis socioecon micos, a partir do estrato I (alto) até o IV (baixo). Os padr es de referência utilizados para a defini o da hipertens o foram os Joint National Committee (JNC), 140/90 mmHg, e da Organiza o Mundial da Saúde (OMS), 160/95 mmHg. RESULTADOS: De acordo com os padr es do JNC, e da OMS, respectivamente, nos estratos, conforme a idade, as prevalências foram as seguintes: estrato (I+II), mais ou menos 60 e 47%; estrato III, 50 e 39%; e estrato IV, 55 e 46%. Entre as mulheres os percentuais foram: no estrato (I+II), 40 e 38%; no estrato III, 56 e 48%; e no estrato IV, 55 e 46%. As prevalências entre os homens pertencentes à popula o economicamente ativa (PEA), quando classificados segundo tipo de ocupa o, tiveram o seguinte comportamento: profissionais aut nomos, formados por microempresário, pequenos comerciantes e profissionais liberais apresentaram uma prevalência de mais ou menos 60 e 37%; operários especializados e empregados em indústrias e oficinas, cerca de 47 e 37%; os assalariados do setor de servi os, mais ou menos 35 e 14%; os aut nomos-diaristas, trabalhadores n o especializados e desempregados, cerca de 50 e 40%. Esses diferenciais foram estatiscamente significantes em rela o ao conjunto, p<0,05 para o padr o JNC, e p<0,005, para o padr o OMS. Quando comparados dois a dois os empregados em servi os, setor menos atingido pela crise econ mica, apresentou prevalência significativamente menor que os demais (p<0,05). Entre as mulheres, pertencentes e n o pertencentes à PEA, as prevalências, segundo o padr o da JNC, foram de 39 e 47%, respectivamente (P<0,025). De acordo com o padr o da OMS os percentuais foram de 27% para as pertencentes à PEA e de 45% para as n o pertencentes (P<0,005). CONCLUS O: Os resultados contrariam a hipótese de que a mulher integrada ao mercado de trabalho torna-se mais exposta aos fatores de risco de doen as n otransmissíveis. Conclui-se, que, nessa popula o a hipertens o é grave problema de saúde pública, com importante determina o s
Qualidade de sabor de tomates dos tipos salada e cereja e sua rela??o com caracteres morfoagron?micos dos frutos
Sobreira, Fábio Moreira;Sobreira, Fabricio Moreira;Almeida, Gustavo Dias de;Coelho, Ruimário Inácio;Rodrigues, Rosana;Matta, Frederico de Pina;
Ciência e Agrotecnologia , 2010, DOI: 10.1590/S1413-70542010000400031
Abstract: fruits in the ripe red stage of thirty three tomato (lycopersicon esculentum mill.) accessions from cca-ufes germplasm collection, being 15 "cherry type" and 18 "salad type", were characterized based on the following morphooagronomic descriptors: average fruit weight; average fruit length; average fruit diameter; peduncle scar diameter; fruit mesocarp thickness; soluble solids and fruit ph. based on the data from the soluble solids and fruit ph, the flavor variable was calculated by the ratio tss/ph2. variance analysis and simple and partial correlations were calculated, and the accessions were clustered in flavor classes. based on the statistical model of distribution of frequencies, four classes were formed for flavor variable. the largest portion (33%) of the accessions of salad type were located in the lowest class (0.05-0.12 obrix.ph-2), corresponding to the accessions with not so desirable a flavor, while the largest portion (30%) of the accessions of the "cherry" type were clustered in the next class above (0.13-0.20 obrix.ph-2). the possibility of concomitantly obtaining genetic gains for flavor, weight, length and mesocarp thickness of the fruits was demonstrated.
Perfil microbiológico, parametros físicos e estabilidade aeróbia de silagens de capim-tifton 85 (Cynodon sp.) confeccionadas com distintas concentra??es de matéria seca e aplica??o de aditivos
Castro, Flávio Geraldo Ferreira;Nussio, Luiz Gustavo;Haddad, Cláudio Maluf;Campos, Fábio Prudêncio de;Coelho, Rodrigo Michelini;Mari, Lucas José;Toledo, Paulo de Almeida;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000200005
Abstract: the objectives of this study were to analyze the effects of wilting and bacterial-enzimatic additive (bea) and buffered propionic acid (bpa) on the microbial profile, physical parameters and aerobic stability of tifton 85 (cynodon spp.) silages stored as squared bales (140 x 120 x 70 cm) wrapped with plastic bags. treatments were based on five forage dry matter (dm) contents (250, 350, 450, 550 and 650 g/kg dm) without bea. other three forage dry matter contents (250, 450 and 650 g k/g dm) were associated with bea while a wilted forage (650 g/kg dm) was sprayed with bpa. silage samples were taken at ensiling time, and after 6 and 12 hours and 1, 2, 4, 8, 16, 32, 90 and 180 days of fermentation. the experimental design was completely randomized with three replications; with dm levels set as the main factor and fermentation time as a split-plot feature of the design. silages containing higher dm contents (> 450 g/kg dm) showed lower bacterial counts, intermediary values of water activity (aw) and silage n-nh3, and improved values of electrical conductivity (ec), ph and higher aerobic stability as compared to the wet silages. results suggest a decrease in aw followed by an inibition on microorganism growth and silage fermentation as the silage dm increased. the bea had positive effect on the silage with dry-matter content of 450 g/kg, mainly on the 32nd day of storage, whereas bpa addition had no benefit.
Características de fermenta??o e composi??o químico-bromatológica de silagens de capim-tifton 85 confeccionadas com cinco teores de matéria seca
Castro, Flávio Geraldo Ferreira;Nussio, Luiz Gustavo;Haddad, Cláudio Maluf;Campos, Fábio Prudêncio de;Coelho, Rodrigo Michelini;Mari, Lucas José;Toledo, Paulo de Almeida;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000100002
Abstract: the objectives of this study were to evaluate the effects of wilting and the application of bacterial enzymatic additive (bea) or buffered propionic acid (bpa) on the fermentation characteristics and chemical composition of tifton 85 (cynodon spp.) silage stored in big square bales wrapped with plastic sheet. the experimental treatments were: five forage dry matter contents (250, 350, 450, 550 and 650 g/kg dm) without bea (woa), three forage dry matter contents (250, 350 and 650 g/kg dm) with bea (wa) and an wilted forage (650 g/kg dm) sprayed with bpa. corn silage samples were taken after 0, 6 and 12 hours and 1, 2, 4, 8, 16, 32, 90 and 180 days of storage to assay for the fermentation and chemical characteristics time trends. the experimental design was completely randomized with three replications with a split plot feature of experimental treatments as main plots and fermentation times as split plot treatments. wilting to 450 g/kg dm did improve fermentation parameters (ph, n-nh3 and buffering capacity) and chemical composition of tifton grass silages. bpa addition did not improve the silage fermentation parameters neither chemical composition. the addition of bea showed marginal benefits only in the high dry matter content silages (650 g/kg dm), with no significant changes in low dry matter silages (250 g/kg dm).
Doen?as cardiovasculares ateroscleróticas, dislipidemias, hipertens?o, obesidade e diabetes melito em popula??o da área metropolitana da regi?o Sudeste do Brasil. III - Hipertens?o
Salas Martins,Ignez; Marucci,Maria de Fátima Nunes; Velásquez-Meléndez,Gustavo; Teixeira Coelho,Leda; Cervato,Ana Maria;
Revista de Saúde Pública , 1997, DOI: 10.1590/S0034-89101997000600004
Abstract: objective: the prevalencies of hypertension are analysed by sex and age group, in social groupings established in accord with social criteria. with a view better to understanding the social dimension of the disease, prevalencies were characterised by type of occupation. material and methods: the sample consisted of 1,041 people and corresponds to the sum of the samples representing the "study areas" established by the use of socio-economic and geographical criteria. four social strata were defined in obedience to a socioeconomic gradient. hypertension was defined by the joint national committee (jnc), 140/90 mmhg, and of the world health organization (who), 160/95 mmhg, standard references. results: according to the jnc and who standard references the prevalencies of hypertension, age adjusted, were of approximately the following: stratum (i+ii) 60 and 37%; stratum iii 50 and 39%; stratum iv 55 e 46%. among women the prevalencies were 40 and 38% (stratum i+ii); 56 and 47% (stratum iii) and 55 and 46% (stratum iv). for the men belonging to the economically active population, classified by occupation, it was showed that the freelance professionals, consisting of businessmen of small firms, small traders and liberal professionals, presented a prevalence of about 60 and 37%; the skilled workers, employed in factories of 35 and 14%; the daily freelance workers, unskilled laborers and unemployed, of 59 and 40%. the women were divided by occupation as belonging or not to the economically active population (eap) and presented the following prevalencies: 39 and 47%, respectively, according to the jnc standard, and 27 and 45%, respectively, according to the who standard. thus it may be seen that these results run counter to the hypothesis that women integrated into the labour market are more exposed to the risk factors for non-transmissible diseases. conclusion: thus it may be concluded that the categories most affected by the present economic were those most affected by hype
Streblidae (Diptera, Hippoboscoidea) sobre morcegos filostomídeos (Chiroptera, Phyllostomidae) em cavernas do Distrito Federal Brasil
Graciolli, Gustavo;Coelho, Daniela Cunha;
Revista Brasileira de Zoologia , 2001, DOI: 10.1590/S0101-81752001000300028
Abstract: a survey of streblid batflies on phyllostomid bats was carried out from caves in distrito federal, brazil during 1997 and 1998. thirteen species were found on eight species of bats. two species of batflies, trichobius lonchophyllae wenzel, 1966 and t. propinquus wenzel, 1976, are new records for brazil.
Ciudad de Goiás: Desafíos para el presente
Neiva Coelho,Gustavo; d'Ayala Valva,Milena;
Apuntes: Revista de Estudios sobre Patrimonio Cultural - Journal of Cultural Heritage Studies , 2009,
Abstract: this text aims to present the process through which passed the city of goias, the ancient capital of the state of goiás in central brazil, implanted as a result of the mining economy in the eighteenth century to achieve recognition by unesco as a world heritage. it also serves to reflect on the management of such title, the lack of political incentives to the development of tourism and economic with the preservation of heritage and the relationship of preserved historic center, with modern environment.
Efeito do tratamento com aditivos químicos e inoculantes bacterianos nas perdas e na qualidade de silagens de cana-de-a?úcar
Pedroso, André de Faria;Nussio, Luiz Gustavo;Loures, Daniele Rebou?as Santana;Paziani, Solidete de Fátima;Igarasi, Maurício Scoton;Coelho, Rodrigo Michelini;Horii, Jorge;Rodrigues, Armando de Andrade;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000300006
Abstract: the objective of this trial was to evaluate chemical and bacterial additives on inhibition of ethanol production, reduction of dm losses and on in vitro digestibility improvement of sugar cane silages. treatments were (wet basis): without additive - control; urea - ur - (0.5; 1.0; 1.5%), naoh (1; 2; 3%), calcium propionate - prop - (0.05; 0.1; 0.2%), sodium benzoate - benz - (0.05; 0.1; 0.2%), potassium sorbate - sorb - (0.015; 0.03; 0.045%), lactobacillus plantarum - pla - (1 x 106 cfu/g), lactobacillus buchneri - buch - (3.64 x 105 cfu/g), l. plantarum combined with urea (0.5 e 1.0%) - pla/ur-0.5% and pla/ur-1.0%. sugar cane was ensiled in 20 l plastic buckets with valves for gas release and a device for effluent collection. data were collected at 90 and 180 d after ensiling. none of the additives was effective in reducing ethanol concentration in the silages and prop-0.1% and pla increased alcohol levels relative to control (4.8 and 12.5% vs 3.8% in dm, respectively). the treatments ur, naoh, sorb-0.03%, buch, pla/ur-0.5% and pla/ur-1.0% reduced total dm losses. silages treated with ur, naoh, benz and sorb-0,045% had higher in vitro dm digestibility than the control silage.
Fermentation and epiphytic microflora dynamics in sugar cane silage
Pedroso, André de Faria;Nussio, Luiz Gustavo;Paziani, Solidete de Fátima;Loures, Daniele Rebou?as Santana;Igarasi, Mauricio Scoton;Coelho, Rodrigo Michelini;Packer, Irineu Humberto;Horii, Jorge;Gomes, Luiz Humberto;
Scientia Agricola , 2005, DOI: 10.1590/S0103-90162005000500003
Abstract: sugar cane silages are characterized by extensive yeast activity, alcohol production and great dry matter - dm - losses. better knowledge of the fermentation process is fundamental to the development of efficient ensilage techniques for this forage. this study evaluates temporal changes in chemical composition, dm losses and epiphytic microflora in sugar cane silage. mature sugar cane, variety rb835486 (12 months of vegetative growth), was hand harvested, processed in a stationary chopper and ensiled in 20-l plastic buckets provided with valves for gas release and a device for effluent collection. laboratory silos were kept at ambient temperature and sampled after ?, 1, 2, 3, 7, 15, 45, 90, 120 and 180 days. ethanol concentration reached 6.4% in dm after 15 days of ensilage, followed by 71% water soluble carbohydrates - wscs - disappearance. gas and total dm losses reached a plateau on day 45 (16% and 29% of dm, respectively). yeast count was higher on the second day (5.05 log cfu g-1). silage ph declined to below 4.0 on the third day. effluent yield was negligible (20 kg t-1). dm content in the forage decreased (35% to 26%) from day 0 to day 45. the increase in ethanol concentration showed an opposite trend to wscs and true in vitro dry matter digestibility reductions in the silage. developing methods to control yeasts, most probably through the use of additives, will enable more efficient production of sugar cane silage by farmers.
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