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Search Results: 1 - 10 of 224012 matches for " Queiroz José Humberto de "
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Characterization and Potential Evaluation of Residues from the Sugarcane Industry of Rio Grande do Sul in Biorefinery Processes  [PDF]
Grazielle Machado, Fernando Santos, Douglas Faria, Taiane Nunes de Queiroz, Flávia Zinani, José Humberto de Queiroz, Fernando Gomes
Natural Resources (NR) , 2018, DOI: 10.4236/nr.2018.95011
Abstract: Brazil is the world largest producer of sugarcane (Saccharum officinarum) leading to a great generation of residues such as bagasse and straw, which represent two thirds of sugarcane energetic potential. Regarding these residues energetic potential, it is interesting to study their application in biorefinery processes. Thus, this work aimed at performing a chemical characterization of sugarcane straw and bagasse from RB867515 cultivar grown in Rio Grande do Sul-Brazil aiming at their use as feedstock in biorefinery processes. The obtained results were compared to data from other states and it was possible to conclude that edaphoclimatic conditions of Rio Grande do Sul have little influence in sugarcane residues chemical composition. Sugarcane bagasse presents larger potential for energetic use because of its volatiles content (74.82%) slightly higher than straw (68.90%), besides its high lignin content (21.85%) and higher calorific value (18.70 MJ/kg). Both sugarcane residues produced in Rio Grande do Sul have potential use as substrate in the obtainment of high value-added products from their cellulosic fractions (41.30% and 37.25%, respectively). The evaluation of energetic and chemical potential of sugarcane bagasse and straw produced in Rio Grande do Sul leads to the conclusion that these materials have high potential for use as feedstock in biorefineries.
Determina o de resíduos de organoclorados em águas fluviais do município de Vi osa - MG
Chagas Cíntia Maria,Queiroz Maria Eliana Lopes Ribeiro de,Neves Ant?nio Augusto,Queiroz José Humberto de
Química Nova , 1999,
Abstract: In this work the contamination, by organochlorinated, of a drinking water source located in the region of Vi osa, MG, was evaluated. The identification and quantification of the analytes was carried out using a gas-chromatograph equipped with an electron capture detector after liquid-liquid extraction and concentration. Four insecticides, Aldrin, Epoxy heptachloride, Endrin and op'- DDT were detected in concentrations that are higher than the safety limits established in the Brazilian legislation.
Determination of carbamates in beverages by liquid-liquid extraction with low temperature partitioning and liquid chromatography
Goulart, Simone M.;Alves, Renata D.;Paula, Washington X. de;Queiroz, José Humberto de;Neves, Ant?nio A.;Queiroz, Maria Eliana L. R. de;
Journal of the Brazilian Chemical Society , 2012, DOI: 10.1590/S0103-50532012000600022
Abstract: carbamates are the pesticides most commonly found in dark colored foods and beverages in cases of accidental or intentional poisoning. in this work, the liquid-liquid extraction with low temperature partitioning (lle-ltp) was optimized and validated for determination of the carbamates aldicarb, carbofuran and carbaryl in grape juice and chocolate milk beverages. this method involved extraction with acetonitrile, liquid-liquid partition at low temperature and the analysis by high performance liquid chromatography with ultraviolet detection (hplc-uv). the method is rapid, efficient and of low-cost, employing small volumes of solvent per sample and requiring no cleanup of the extracts. the extraction methodology was selective and presented recovery percentages above 90%. the premises related to the statistical linearity tests were checked and confirmed. the method of extraction and analysis was validated with satisfactory results, and may be applied in forensic and routine analysis.
Determina??o de resíduos de organoclorados em águas fluviais do município de Vi?osa - MG
Chagas, Cíntia Maria;Queiroz, Maria Eliana Lopes Ribeiro de;Neves, Ant?nio Augusto;Queiroz, José Humberto de;Oliveira, Tania Toledo de;Nagem, Tanus Jorge;
Química Nova , 1999, DOI: 10.1590/S0100-40421999000400007
Abstract: in this work the contamination, by organochlorinated, of a drinking water source located in the region of vi?osa, mg, was evaluated. the identification and quantification of the analytes was carried out using a gas-chromatograph equipped with an electron capture detector after liquid-liquid extraction and concentration. four insecticides, aldrin, epoxy heptachloride, endrin and op'- ddt were detected in concentrations that are higher than the safety limits established in the brazilian legislation.
Perfil lipídico tecidual de ratos alimentados com diferentes fontes lipídicas
Almeida, Martha Elisa Ferreira de;Queiroz, José Humberto de;Queiroz, Maria Eliana Lopes Ribeiro de;Costa, Neuza Maria Brunoro;Matta, Sérgio Luis Pinto;
Revista de Nutri??o , 2009, DOI: 10.1590/S1415-52732009000100005
Abstract: objective:to determine if lipid sources with different unsaturated to saturated fatty acid ratios, (pufa+mufa)/sfa in the diet alter the lipid profile of tissues, the lipid concentration (mg/g) of the hepatic and mesenteric tissues and the lipid digestibility. methods:gas chromatography was used to determine the profile of fatty acids in the hepatic and adipose tissues of rats fed with different lipid sources. the digestibility coefficient was determined based on the ratio between lipid intake and excreted in the feces. results:different lipid sources (soy oil, butter, margarine and pig and fish fat) did not alter the digestibility coefficient and the hepatic weight, but they altered the lipid deposition in all adipose tissue evaluated. no direct correlation was observed between dietary non-essential fatty acid profile and its deposition in the studied adipose tissues, because of de novo which impedes the identification of the dietary fatty acid. conclusion:a direct relationship was not verified between the dietary fatty acid profile and its deposition in the studied adipose tissues, except for the trans and linoleic (c18:2) fatty acids which are not synthesized in the rat. the tissue concentration of these fatty acids was directly proportional to their dietary sources. the (pufa+mufa)/sfa ratio found in the hepatic tissue of the different groups, was directly proportional to the values presented in the dietary lipid sources. however, this association was not observed in the adipose tissue.
Lipídeos séricos e morfologia hepática de ratos alimentados com diferentes fontes lipídicas (óleo de soja, gordura de peixe e porco, margarina e manteiga)
Almeida, Martha Elisa Ferreira de;Queiroz, José Humberto de;Costa, Neuza Maria Brunoro;Matta, Sérgio Luis Pinto;
Revista de Nutri??o , 2011, DOI: 10.1590/S1415-52732011000100014
Abstract: objective: this study analyzed serum lipids and hepatics morphological changes in rats fed different lipid sources (soybean oil, fish fat and lard, margarine and butter). methods: fifty wistar rats were divided into five groups. they were given semi-synthetic diets with different lipid sources for 28 days: soybean oil, lard, butter, margarine and fish fat. body weight, food intake, food efficiency coefficient, lipoprotein lipase activity, serum concentrations of total cholesterol and high density lipoprotein-cholesterol, triacylglycerols and albumin were assessed. the heart and liver tissues underwent histological assessment. results: the type of lipid source did not influence food intake, weight gain or food efficiency coefficient. the activity of the lipoprotein lipase was also unaffected; however, there were changes in the serum concentration of total cholesterol, high density lipoprotein-cholesterol, triacylglycerols and albumin. all groups presented lipid droplets on the coronary walls and heart capillaries. the fat deposition on the liver of animals given soybean oil, fish fat and lard, and butter was characterized as steatosis. conclusion: the lipid source that presented the best results was soybean oil. fish fat affected the serum and tissues similarly to other lipid sources (lard, butter and margarine). this may contribute to the onset and progression of cardiovascular diseases.
Miíase humana por Dermatobia hominis (Linneaus Jr.) (Diptera, Cuterebridae) e Cochliomyia hominivorax (Coquerel) (Diptera, Calliphoridae) em Sucess o Parasitária
José Antonio Batista-da-Silva,Humberto de Castro Abádio,Margareth Maria de Carvalho Queiroz
EntomoBrasilis , 2009,
Abstract: O objetivo deste trabalho foi relatar um caso raro de sucess o parasitária de duas espécies de larvas de moscas produtora de miíase primária, Dermatobia hominis e Cochliomyia hominivorax, em um jovem de 12 anos atendido em um hospital público no município de S o Gon alo (RJ).Human Myiases for Dermatobia hominis (Linnaeus Jr.) (Diptera, Cuterebridae) and Cochliomyia hominivorax (Coquerel) (Diptera, Calliphoridae) in Parasitic SuccessionAbstract. The objective this work was to tell a rare case of parasitic succession of two species of larvae of flies producing of primary myiases, Dermatobia hominis and Cochliomyia hominivorax, in a 12 year-old youth assisted in an public hospital in S o Gon alo (RJ).
Avalia??o morfológica dos conjuntos guia excêntrico: placas dcp-l 4.5 mm
Borges, José Humberto de Souza;Silva Filho, Antonio Lisboa da;Pereira Neto, Francisco;Daher, Walter Rodrigo;Mesquita, Alessandro Queiroz de;Freitas, Anderson;
Acta Ortopédica Brasileira , 2012, DOI: 10.1590/S1413-78522012000100002
Abstract: objective: to carry out isolated and comparative evaluations of the measurements of the set eccentric guide plates used in 4.5mm surgical implants, and to determine the effect of these measurements on compression strength. methods: four eccentric guides, (or guide plates?) four large dynamic compression plates (l-dcp) from four local manufacturers, and a vonder? 200 mm caliper brand were used. five standard parameter measurements were created for the set eccentric guide-plate, which were identified as a to e. four sets were made, using materials of the same factory, and identified as groups i to iv. the analyses were performed by measuring all the parameters from a ventral view of the plate, with the eccentric guide placed in the plate hole. results: groups i and ii showed the same values for all the parameters. all the groups showed the same measurements for e = 8.15 e b = 3.60. group iii: a = 8.10mm, c = 3.25mm, d = 1.25mm. group iv: a = 7.00mm, c = 3.10mm, d = 0.30mm. maximum compression force was (f max.): group i 80.58 n, group. ii: f max. 81.63 n, group. iii: f max. 36.32n, group. iv: f max. 37.52n conclusion: the measurements evaluated show a lack of standardization in the manufacture of orthopedic instruments and its effects on the values for compression strength. level of evidence: level iii, analytical study.
'Tommy Atkins' mango trees subjected to high density planting in subhumid tropical climate in northeastern Brazil
Sousa, Carlos Ant?nio Ferreira de;Cavalcanti, Maria Irisvalda Leal Gondim;Vasconcelos, Lúcio Flavo Lopes;Sousa, Humberto Umbelino de;Ribeiro, Valdenir Queiroz;Silva, José Algaci Lopes da;
Pesquisa Agropecuária Brasileira , 2012, DOI: 10.1590/S0100-204X2012000100006
Abstract: the objective of this work was to evaluate the effects of high density planting on 'tommy atkins' mango trees cultivated in subhumid warm tropical climate in northeastern brazil. treatments consisted of five spacial arrangements of plants (8x5 m, 7x4 m, 6x3 m, 5x2 m and 4x2 m), which resulted in the following plant densities: 250 (control), 357, 555, 1,000 and 1,250 plants per hectare. plant vegetative and reproductive variables, besides fruit quality parameters, were evaluated at seven and eight years after transplantation to the field. in general, high density planting caused reduction in vegetative and reproductive variables of individual mango trees, but had little influence on fruit quality. above 555 plants per hectare, a significant decrease was observed in mango tree growth. furthermore, there were decreases in the percentage of flowering, fruit yield per plant and per area. however, planting density up to 357 plants per hectare, in spite of decreasing plant growth and fruit yield per tree, increases fruit yield per area in 30% in comparison to the control.
Consumo, digestibilidade aparente e desempenho de vacas leiteiras alimentadas com concentrado processado de diferentes formas
Wernersbach Filho, Humberto Luiz;Campos, José Maurício de Souza;Assis, Anderson Jorge de;Valadares Filho, Sebasti?o de Campos;Queiroz, Augusto César de;Valadares, Rilene Ferreira Diniz;Lana, Rogério de Paula;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000400038
Abstract: the objective of this trial was to study the effects of different forms of concentrate processing on intake, apparent total tract digestibility of nutrients, ruminal degradability of dm and cp, and milk yield and composition. sixteen dairy cows, pure holstein and crossbred, were blocked by production level (30.0 and 20.0 kg/day) and randomly assigned to two latin squares with four periods of 15 days each. diets were isonitrogenous and contained the following forage (corn silage):concentrate ratios: 50:50 and 60:40 (% of dm) for cows yielding 30.0 and 20.0 kg of milk/day, respectively. apparent total tract digestibility of dm was not affected by the different forms of concentrate processing while apparent cp digestibility for cows fed extruded concentrate (72.36%) was lower than that for cows fed grounded concentrate at a forage:concentrate ratio of 50:50. apparent total tract digestibility of neutral detergent fiber (44,35%) was lower (p<0.05) for cows fed extruded concentrate at the lowest forage:concentrate. milk yield was higher for cows fed the extruded diet (29.9 kg/day), at the greatest concentrate level, but no significant differences were observed for cows at the lowest (60:40) concentrate level.
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