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Search Results: 1 - 10 of 298637 matches for " Paulo W. L.;Rocha "
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Determina??o espectrofotométrica simultanea de cobre e ferro em álcool etílico combustível com reagentes derivados da ferroína
Teixeira, Leonardo S. G.;Brasileiro, Jo?o F.;Borges Jr., Mário M.;Cordeiro, Paulo W. L.;Rocha, Sarah A. N.;Costa, Antonio C. Spínola;
Química Nova , 2006, DOI: 10.1590/S0100-40422006000400020
Abstract: in the present work three ferroin reagents were studied for the simultaneous spectrophotometric determination of iron and copper: 1,10-phenanthroline, 2,2'-bipyridine and 2,4,6-tri(2-pyridyl)-1,3,5-triazine. effect of ph, conditions, order reagent addition, interferences, amount of reagents, lineal range, sensitivity and stability of each system were compared. the 2,4,6-tri(2-pyridyl)-1,3,5-triazine can be used for determination of iron in the presence of copper with a detection limit of 5 μg l-1 and coefficient of variation of 2.0%; however it was not possible to determine directly copper in the presence of iron with this reagent. 1,10-phenanthroline can be used for simultaneous determination of the metallic ions with detection limits of 7 and 8 mg l-1 and coefficients of variation of 1.8 and 2.3% in the determination of iron and copper, respectively. the results showed also that 2,2'-bipyridine can be used for simultaneous determination of the metallic ions with detection limits of 11 and 32 μg l-1 and coefficients of variation of 1.9 and 2.5% in the determination of iron and copper, respectively. the reagents were used for spectrophotometric determination of iron and copper in ethanol fuel.
Good Practices in Strategic Environmental Assessment Processes under the Brazilian Practitioners’ Vision  [PDF]
Antonio W. L. da Silva, Marinilse Netto, Paulo Selig, Alexandre Lerípio
Journal of Environmental Protection (JEP) , 2018, DOI: 10.4236/jep.2018.96045
Abstract: The use of good practices (GP) can improve the technical quality and, as a consequence, the outcome of the Strategic Environmental Assessment (SEA) process, increasing its effectiveness. This study aimed to present GP pointed out by Brazilian practitioners (members of the SEA development teams) from the perspective afforded by their participation in processes of this tool. The data were collected through personal interviews with 11 professionals responsible for preparing a total of 17 SEAs, who were asked about what measures adopted in the SEA could be considered BP. The responses were audio-recorded, transcribed, and had their content assessed by Content Analysis technique. Nine GP were highlighted by practitioners. The GP indicated represent a valuable contribution to the improvement of future use of SEA, either in Brazil or in other countries, because they are the result of consolidated experience in real cases of application of the tool.
Deconvolu??o de processo sísmico n?o-estacionário
Leite, L. W. B.;Rocha, M. P. C. da;
Revista Brasileira de Geofísica , 2000, DOI: 10.1590/S0102-261X2000000100007
Abstract: the present paper treats the application of the kalman-bucy filter (kbf), organized as a deconvolution (kbdf), for the extraction of the reflectivity function from seismic data. this means that the process is described as non-stationary, and corresponds to a generalization of the wiener-kolmogorov theory. the mathematical description of the kbf preserves its relationship to the wiener-hopf filter (whf) that deals with the counterpart stationary stochastic process. the strategy to solve the problem is structured in parts: (a) the optimization criterion; (b) the a priori knowledge; (c) the algorithm; and (d) the quality. the a priori knowledge includes the convolutional model, and establishes statistics to its components (effective source wavelet, reflectivity function, and geological and local noises). to demonstrate the versatility, applicability and limitations of the method, we performed systematic deconvolution experiments under several situations of additive noise levels and effective source wavelet. first, we demonstrate the necessity of equalizer filters, and second that the spectral coherence factor is a good measure of the quality of the process. we also justify the present study for its application in real data, as exemplified.
The cause of urinary symptoms among Human T Lymphotropic Virus Type I (HLTV-I) infected patients: a cross sectional study
Paulo N Rocha, Ana Rehem, Juliana F Santana, Neviton Castro, Andre L Muniz, Katia Salgado, Heonir Rocha, Edgar M Carvalho
BMC Infectious Diseases , 2007, DOI: 10.1186/1471-2334-7-15
Abstract: In this cross sectional study we interviewed, and cultured urine from, 157 HTLV-I seropositive individuals followed regularly at a specialized clinic. All patients were evaluated by a neurologist and classified according to the Expanded Disability Status Scale (EDSS). Urodynamic studies were performed at the discretion of the treating physician.Sixty-four patients complained of at least one active urinary symptom but UTI was confirmed by a positive urine culture in only 12 of these patients (19%); the majority of symptomatic patients (81%) had negative urine cultures. To investigate the mechanism behind the urinary complaints in symptomatic individuals with negative urine cultures, we reviewed the results of urodynamic studies performed in 21 of these patients. Most of them (90.5%) had abnormal findings. The predominant abnormalities were detrusor sphincter hyperreflexia and dyssynergia, findings consistent with HTLV-I-induced neurogenic bladder. On a multivariate logistic regression, an abnormal EDSS score was the strongest predictor of urinary symptomatology (OR 9.87, 95% CI 3.465 to 28.116, P < 0.0001).Urinary symptomatology suggestive of UTI is highly prevalent among HTLV-I seropositive individuals but true UTI is responsible for the minority of cases. We posit that the main cause of urinary symptoms in this population is neurogenic bladder. Our data imply that HLTV-I infected patients with urinary symptomatology should not be empirically treated for UTI but rather undergo urine culture; if a UTI is excluded, further investigation with urodynamic studies should be considered.Human T Cell Lymphotropic Virus type I (HTLV-I) is a retrovirus that infects T lymphocytes and may cause a wide spectrum of clinical manifestations, including HTLV-I associated myelopathy/tropical spastic paraparesis (HAM/TSP), uveitis, and adult T cell leukemia. Fortunately, the majority of seropositive individuals have no signs or symptoms of illness attributable to HTLV-I infection [1]. H
Assessment of serum catecholamine concentrations in patients with pheochromocytoma undergoing videolaparoscopic adrenalectomy
Rocha, Marcos F.;Patrick, Tauzin-Fin;Vasconcelos, Paulo L.;Ballanger, Philippe;
International braz j urol , 2005, DOI: 10.1590/S1677-55382005000400002
Abstract: introduction: we analyzed the changes in serum catecholamine concentrations, i.e. adrenaline and noradrenaline, in response to surgical stress in patients with pheochromocytoma who undergone videolaparoscopic adrenalectomy. materials and methods: between january 1998 and march 2002, 11 patients underwent 12 videolaparoscopic adrenalectomies. in one case, the adrenalectomy was bilateral. serum catecholamines were measured at 6 surgical times: t0: control before induction; t1: following the induction, laryngoscopy and intubation sequence; t2: after installing the pneumoperitoneum; t3: during manipulation-exeresis of the pheochromocytoma; t4: following ablation of the pheochromocytoma; t5: in the recovery room following intervention when the patient was extubated and was hemodynamically stable. results: mean concentrations of serum noradrenaline were significantly different when the t0 and t2 surgical times were compared (t0: 3161 pg/ml; t2: 40440 pg/ml; p < 0.01), t0 and t3 (t0: 3161 pg/ml; t3: 46021 pg/ml; p < 0.001), t1 and t3 (t1: 5531 pg/ml; t3: 46021 pg/ml; p < 0.01), t2 and t4 (t2: 40440 pg/ml; t4: 10773 pg/ml; p < 0.01) and t3 and t5 (t3: 46021 pg/ml; t5: 2549 pg/ml; p < 0.001). mean concentrations of serum adrenaline were significantly different when the t0 and t3 surgical times were compared (t0: 738 pg/ml; t3: 27561 pg/ml; p < 0.01). conclusion: the pneumoperitoneum significantly increases serum noradrenaline concentrations, manipulation of the adrenal gland significantly increases the serum concentrations of noradrenaline and adrenaline, and the pheochromocytoma ablation significantly decreases serum noradrenaline concentrations.
Forma??o técnica de agente comunitário indígena de saúde: uma experiência em constru??o no Rio Negro
Garnelo, Luiza;Rocha, Esron;Peiter, Paulo;Sampaio, Sully;Santos, Elciclei;Pontes, Ana Lúcia;Stauffer, Anakeila;
Trabalho, Educa??o e Saúde , 2009, DOI: 10.1590/S1981-77462009000200010
Abstract: this report describes the experience of the technical professional training of 250 indigenous community health agents linked to the special indigenous sanitary district of rio negro in the state of amazonas. the initiative promotes the increase of the level of education and the respect towards the specific cultural features of the students. the main pedagogical elements, 'culture', 'territory', 'policy', 'care', 'information', 'education', and 'health planning' form a curriculum matrix that is operationalized through teaching based on research, multilinguism, multi-disciplinarism, and intersectoralism, in tune with the principles of indigenous education, the special attention to the health of indigenous peoples, and of curriculum references of the technical training of community health agents. the pedagogy process fosters the acquisition of skills and competencies to diagnose and monitor health conditions and the risk and vulnerability of indigenous populations, in order to support preventive actions, promotion, treatment, and rehabilitation at the different stages of life, and develop political and communal action in the fight for better health. preliminary results of the experience show the recognition and strengthening of the indigenous health agents work, the improving the quality of health work in the community, and the highest level of satisfaction of the leaders of the indigenous movement, by broadening the access to a qualified and specialized education.
O efeito da eritropoetina humana recombinante no tratamento da anemia da prematuridade
Rocha, Vera Lúcia L.;Benjamin, Ana Cláudia W.;Procianoy, Renato S.;
Jornal de Pediatria , 2001, DOI: 10.1590/S0021-75572001000200005
Abstract: objective: to assess the efficacy of erythropoietin in the prevention and treatment of anemia of prematurity, correlating the use of this drug with weight gain, length, and head circumference and comparing two administration schemes of he same weekly dose: daily use and twice a week. methods: the study comprised 42 premature newborns with gestational age up to 33 weeks, birthweight up to 1550 g, and postnatal age between 10 and 35 days. the newborns were randomized into three groups: patients in group 1 received seven daily doses of 100 u/kg erythropoietin per week; patients in group 2 received two 350 u/kg erythropoietin doses per week; and patients in group 3 did not receive the drug. hematologic measurements, blood transfusion requirements, and growth rates were followed during therapy. results: cases and controls did not differ with respect to weight, length, head circumference, and total time of hospital stay. at the end of the study, no significant difference was observed in the platelet count measurement means, white blood cell count, and ferritin levels in the three groups. however, the final hematocrit and hemoglobin values of patients who did not receive erythropoietin were significantly lower than those of patients who received the drug. the absolute reticulocyte count mean was significantly higher in patients who received erythropoietin after two weeks of treatment when compared with those patients who did not receive the drug. patients in group 1 e 2 received fewer excessive transfusions (2 or more) than patients in group 3. the administration of 700 u/kg/week erythropoietin significantly reduced the number of excessive blood transfusions. there is no significant difference in blood transfusion volume between patients who received erythropoietin on a daily basis and those who received the drug twice weekly. conclusions: the use of erythropoietin did not influence weight gain and growth. the administration of 700 u/kg/week erythropoietin in premature inf
Acesso e acolhimento na aten??o básica: uma análise da percep??o dos usuários e profissionais de saúde
Souza, Elizabethe Cristina Fagundes de;Vilar, Rosana Lúcia Alves de;Rocha, Nadja de Sá Pinto Dantas;Uchoa, Alice da Costa;Rocha, Paulo de Medeiros;
Cadernos de Saúde Pública , 2008, DOI: 10.1590/S0102-311X2008001300015
Abstract: this article is part of the evaluation study on the project for expansion and consolidation of the family health strategy, conducted by the center for public health research at the federal university in rio grande do norte, brazil, from march to december 2005. the study presents an assessment of primary health care access and receptivity from the perspective of patients and health professionals, comparing traditional primary care units and family health units in three state capitals in northeast brazil. the methodology included focus groups with content analysis. the results identified increased access, but there is still a disproportion between potential supply, capacity to meet the demand, and difficulties with referral in both the family health units and traditional primary care units. as an operational technology, receptivity is still under construction in the family health units, with varying levels of adherence to both the concept and the strategies for reorganizing daily work practices. meanwhile, receptivity is totally absent from the traditional primary care units. the study suggests that qualitative analyses be included in health assessment in order to better explain the subjective aspects of the various actors.
Comparison of semi-automatized assays for anti-T. gondii IgG detection in low-reactivity serum samples: importance of the results in patient counseling
Leser, Paulo Guilherme;Rocha, Lúcia Sivieri de Assis;Moura, Maria Emília Germani;Ferreira, Antonio Walter;
Jornal Brasileiro de Patologia e Medicina Laboratorial , 2003, DOI: 10.1590/S1676-24442003000200003
Abstract: toxoplasmosis is a disease which can cause severe congenital infection and is normally diagnosed by the detection of t. gondii specific antibodies in the serum of infected patients. several different tests allow to distinguish recent from past infections and to quantify anti-t. gondii specific igg, and the results can be used as markers for immunity. in the present study, we compare the performance of two different methodologies, the elfa (biomérieux s.a) and the meia (abbott laboratories) in detecting t. gondii specific igg in low-reactivity sera. of 76 analyzed samples, three presented discrepant results, being positive in the abbott axsym toxo igg assay, and negative in the biomérieux vidas toxo igg ii assay. by using other tests, the three sera were confirmed to be negative. the results are discussed in the context of their importance for patient management, especially during pregnancy.
Glacially striated, soft sediment surfaces on late Paleozoic tillite at S?o Luiz do Purun?, PR
Trosdtorf Jr., Ivo;Assine, Mario L.;Vesely, Fernando F.;Rocha-Campos, Antonio C.;Santos, Paulo R. dos;Tomio, Alexandre;
Anais da Academia Brasileira de Ciências , 2005, DOI: 10.1590/S0001-37652005000200013
Abstract: striae and furrows found on the upper surfaces of three stratigraphically superposed decimetric beds of late paleozoic lodgement tillite of the itararé subgroup in the northern paraná basin were engraved by ploughing of clasts and possibly also ice protuberances at the base of the glacier, on unconsolidated to partially consolidated sediment. associated features indicate that the rheology of the bed varied from stiff during lodgement to soft and deformable during ploughing. poor drainage of meltwater at the glacier-bed interface may have contributed to lower the strength of sediment to deformation. the deformed interval was probably generated during a single glacial phase or advance of a glacier grounding in a marine or lacustrine water body. changes in the dynamics of the glacier involving slow and fast flow were correlated respectively with alternation of deposition and erosion. the proposed model is analogous to that of lodgement till complexes from the pleistocene of the northern hemisphere. retreat of the glacier was probably fast, followed by settling of muds on top of the upper striated and furrowed surface, and progradation of deltaic sands during post-glacial time.
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