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Search Results: 1 - 10 of 586631 matches for " G. S. P. TOLEDO "
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EXPERIMENTAL AND NUMERICAL CURVED FLOW STUDY FOR METROLOGY PURPOSES
F. Sánchez,A. Gómez,M. Toledo,P. Quinto
Journal of applied research and technology , 2003,
Abstract: Most of the current volumetric flow measurement methods represent an important investment for manyindustries. However, when the accuracy requirements for the processes are not too high, curved pipes couldbe used as primary elements for this purpose. Unfortunately, there is a lack of information for this device asflowmeter, so more experimental and numerical research is required for its full characterization. This paperreports the experimental work conducted on three commercial 90o elbows, installed horizontally. All of themwere short curvature radius with 0.75, 1 and 1.5 inches of internal diameter; water maintained at 24 oC wasemployed for the experiments. Pressure taps on the elbows were located at 45 o along the curvature radius,on both inside and outside the wall. The performance of the elbow was compared against a calibrated orificeplate. A numerical study using CFD-2000 provided more information about the pressure and velocity fields, soit was posible to develop a model to describe the curvature effects on the radial pressure gradient.Experimental results show that there is a greater sensibility of the element when the curvature radiusdecreases, this means, a larger pressure gradient is obtained. If this radial pressure gradient is used in thetypical equation for the orifice plate, a good concordance between the measurements of both elements isobserved.
USO DE SUBPRODUTOS AGROINDUSTRIAIS NO DESENVOLVIMENTO DE MACARR O NUTRICIONALMENTE MELHORADO
A. M. NICOLETTI,L. P. SILVA,L. H. HECKTHEUER,G. S. P. TOLEDO
Alimentos e Nutri??o , 2008,
Abstract: O presente trabalho teve como objetivo desenvolver uma formula § £o de macarr £o nutricionalmente melhorado. Tal produto foi escolhido para o desenvolvimento deste estudo por ser um alimento popular, amplamente consumido e barato; por m, de caracter -stica prioritariamente energ tica, com defici ancias no teor e qualidade prot icas. Para corrigir estas defici ancias foram usados, como ingredientes majorit rios, a quirera de arroz e o farelo de soja, que s £o subprodutos agroindustriais de baixo custo e abundantemente produzidos no Pa -s. A formula § £o desenvolvida apresentou teor de prote -na 34,5% superior ao macarr £o convencional, bem como teor de fibra e minerais totais 2,6 e 1,9 vezes superiores, respectivamente, por m, sem alterar significativamente os valores energ ticos. Houve uma complementa § £o do padr £o aminoac -dico desta formula § £o, suprindo as recomenda § μes da FAO/WHO/ UNU tanto para crian §as como para adultos. Os resultados da an lise sensorial mostraram valores de aceitabilidade acima de 80% do macarr £o nutricionalmente melhorado, para ambos os p oblicos.
Aislamiento de especies de enterococos causantes de infecciones y su sensibilidad a los antimicrobianos
Toledo,C.; Pérez,M.E.; Rocchi,M.; Gribaudo,G.; Mangiaterra,S.; Monterisi,A.;
Revista argentina de microbiolog?-a , 2004,
Abstract: beetween april 1, 1999 and june 30, 2000, 144 isolates of enterococci (one per patient) from cultures of several anatomic sites were collected . one hundred and nineteen (82.6%) e. faecalis, 11 (7.6%) e. faecium and 14 (9.7%) of other species (5 e. raffinosus, 4 e. avium, 3 e. casseliflavus, 1 e. pseudoavium, and 1 e. dispar) were associated with clinical infections. the most common sites of isolation were: the urinary tract 54.9%, abdominal cavity 12.5%, surgical wounds 12.5%, abscesses 6.9% and diabetic foot 6.2%. high-level resistance to gentamicin or streptomycin or both was detected in 48.6% of the isolates. e. faecium and e. raffinosus were significantly more resistant than e. faecalis to ampicilin and imipenem. none of the strains exhibited b-lactamase activity. one strain of e. faecium (0.7%) was resistant to vancomicin and teicoplanin (van a phenotype) and two strains of e. casseliflavus (1.4%) showed low level of resistance to vancomicin (van c phenotype). because of these diverse antimicrobial resistance mechanisms, successful treatment and control of enterococcal infections with current antimicrobial agents are becoming increasingly difficult.
Efeito da fibra de coprodutos agroindustriais e sua avalia??o nutricional para coelhos
Retore, M.;Silva, L.P.;Toledo, G.S.P.;Araújo, I.G.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2010, DOI: 10.1590/S0102-09352010000500028
Abstract: the influence of fiber - alfalfa hay, citrus pulp, and soybean hulls - in diets of rabbits was studied on performance, digestibility coefficients, blood parameters, and meat characteristics. the animals were allotted into three treatments that consisted in: control diet, with alfalfa hay; total substitution of alfalfa hay by citrus pulp; and total substitution of alfalfa hay by soybean hulls. the different fiber fractions from citrus pulp and soybean hulls did not affect animal performance at the 89th day; thus, these ingredients can be used as substitute of alfalfa hay on diet of rabbits. fiber quality of citrus pulp decreased blood triacylglycerol, cholesterol, and hemoglobin levels. lower amount of lignin in relation to cellulose and hemicellulose of soybean hulls provided better nutrient digestibility coefficients and higher tenderness meat, however, lower protein deposition when compared with the citrus pulp diet.
Surgical approach to medullary thyroid carcinoma associated with multiple endocrine neoplasia type 2
Tavares, Marcos R.;Toledo, Sérgio P. A.;Montenegro, Fábio L. M.;Moyses, Raquel A.;Toledo, Rodrigo A.;Sekyia, Tomoko;Cernea, Claudio R.;Brand?o, Lenine G.;
Clinics , 2012, DOI: 10.6061/clinics/2012(Sup01)25
Abstract: we briefly review the surgical approaches to medullary thyroid carcinoma associated with multiple endocrine neoplasia type 2 (medullary thyroid carcinoma/multiple endocrine neoplasia type 2). the recommended surgical approaches are usually based on the age of the affected carrier/patient, tumor staging and the specific rearranged during transfection codon mutation. we have focused mainly on young children with no apparent disease who are carrying a germline rearranged during transfection mutation. successful management of medullary thyroid carcinoma in these cases depends on early diagnosis and treatment. total thyroidectomy should be performed before 6 months of age in infants carrying the rearranged during transfection 918 codon mutation, by the age of 3 years in rearranged during transfection 634 mutation carriers, at 5 years of age in carriers with level 3 risk rearranged during transfection mutations, and by the age of 10 years in level 4 risk rearranged during transfection mutations. patients with thyroid tumor >5 mm detected by ultrasound, and basal calcitonin levels >40 pg/ml, frequently have cervical and upper mediastinal lymph node metastasis. in the latter patients, total thyroidectomy should be complemented by extensive lymph node dissection. also, we briefly review our data from a large familial medullary thyroid carcinoma genealogy harboring a germline rearranged during transfection cys620arg mutation. all 14 screened carriers of the rearranged during transfection cys620arg mutation who underwent total thyroidectomy before the age of 12 years presented persistently undetectable serum levels of calcitonin (<2 pg/ml) during the follow-up period of 2-6 years. although it is recommended that preventive total thyroidectomy in rearranged during transfection codon 620 mutation carriers is performed before the age of 5 years, in this particular family the surgical intervention performed before the age of 12 years led to an apparent biochemical cure.
Efeito embriotóxico, teratogênico e abortivo de plantas medicinais
Rodrigues, H.G.;Meireles, C.G.;Lima, J.T.S.;Toledo, G.P.;Cardoso, J.L.;Gomes, S.L.;
Revista Brasileira de Plantas Medicinais , 2011, DOI: 10.1590/S1516-05722011000300016
Abstract: the ancient use of medicinal plants has shown over the years that certain plants have potentially dangerous substances. from a scientific point of view, some studies have shown that many of these plants contain aggressive substances and therefore should be used with caution, respecting their toxicological risks. the most important effects of the indiscriminate use of medicinal plants are embryotoxic, teratogenic and abortifacient since the plant constituents can cross the placenta, reaching the fetus and leading to one of these effects. this study aimed to provide a list of the major medicinal plants that have proven embryotoxic, teratogenic and abortifacient effects, including the used plant parts and their respective scientific names, in order to warn pregnant women about the risks of its use. searches were carried out in the electronic databases scielo, pubmed, medline, lilacs, capes and google scholar. results indicated that plants such as mountain arnica (arnica montana), mugwort (artemisia vulgaris), fringed rue (ruta chalepensis / ruta graveolens), "barbatim?o" (stryphnodendron polyphyllum) and "boldo" (vernonia condensata) are likely to generate such an effect. this study shows that for most medicinal plants there are not data regarding the safety of their use during pregnancy.
Síndrome de discinesia apical transitoria: Presentación de 1caso
Céspedes Suárez,Javier Cecilio; Pérez Marrero,Janzel; Almeida Gómez,Javier; álvarez Toledo,Orlando; Valdés Recarey,Manuel; Méndez Peralta,Tomás C;
Revista Cubana de Medicina , 2007,
Abstract: the case of a 55-year-old postmenopausal female patient with clinical symptoms of heart failure and diagnosis of atrial myxoma that made her underwent surgery, was reported. in the postsurgical, she presented electrocardiographic and echocardiographic signs of acute myocardial infarction with disfunction of the left ventricle. a coronariography that proved to be normal was peformed. a left ventricle apical dyskinesia syndrome was confirmed, of which there were no previous references in our country.
La actitud hacia la ense?anza y aprendizaje de la ciencia en alumnos de Ense?anza Básica y Media de la Provincia de Llanquihue, Región de Los Lagos-Chile
Hernández,V; Gómez,E; Maltes,L; Quintana,M; Mu?oz,F; Toledo,H; Riquelme,V; Henríquez,B; Zelada,S; Pérez,E;
Estudios pedagógicos (Valdivia) , 2011, DOI: 10.4067/S0718-07052011000100004
Abstract: the following research characterizes the students' attitude towards the teaching and learning of science in different educational establishments (private, subsidized and public). the attitude is understood from five dimensions and these linked together build up the students' attitude. among the findings, the teacher's didactics used in the classroom continues being the main problem that discourages and moves the students away from science. it is important to consider the students' positive attitude regarding the use of the natural environment as a didactic resource. this creates a new need regarding the didactic innovation inside and outside the classroom. moreover, it gives a new significance to the environment, which allows establishing a direct connection to the constructivist methodologies, the fundamental theory of the educational system in our country.
Wind Tunnel at LABINTHAP (Updated)  [PDF]
P. Rosas Quiterio, M. Toledo Velázquez, G. Tolentino Eslava, R. Tolentino Eslava, J. Abugaber Francis
Energy and Power Engineering (EPE) , 2011, DOI: 10.4236/epe.2011.34070
Abstract: Flow behavior in the Thermal Engineering and Applied Hydraulics Laboratory (LABINTHAP) wind tunnel was investigated by measuring the velocity profiles, turbulence intensity and wall effects with a hot wire anemometer. Measurements were carried out under wind speeds 5, 15 and 30 m/s in planes located at 1.8, 2.6 and 3.4 m from flow inlet to the test section. The flow showed a good quality with a velocity variation less than 1%, turbulence intensity lower than 4% and the wall effects allow having an excellent work area in the test section for the velocities evaluated.
Pore-level modeling of isothermal drying of pore networks: Evaporation and viscous flow
Segura,L. A.; Toledo,P. G.;
Latin American applied research , 2005,
Abstract: simulation results of drying of non-hygroscopic liquid-wet rigid porous media are presented. two and three-dimensional pore networks represent pore spaces. two kinds of mechanisms are considered: evaporation and hydraulic flow. the process is considered under isothermal condition. under these conditions capillary forces are dominant over viscous forces; drying is thus considered as a modified form of invasion percolation. liquid in pore corners allows for hydraulic connection throughout the network at all times. as drying progresses, liquid is replaced by vapor by two fundamental mechanisms: evaporation and pressure-gradient-driven liquid flow. using monte carlo simulation, we find evaporation and drainage times; the shortest calculated indicates the controlling mechanism. here we report distributions of liquid and vapor as drying time advances. predictive drying curves and liquid distributions compare well with experimental results for hexane in transparent two-dimensional micromodels. liquid permeability and vapor diffusivity are reported as functions of liquid saturation.
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