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Search Results: 1 - 10 of 138250 matches for " Pires José Carlos dos Santos "
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Avalia??o do tamanho, da morfologia e da composi??o química de inclus?es n?o metálicas em a?o baixo carbono desoxidado ao alumínio
Pires, José Carlos dos Santos;Fernandes Neto, Marcolino;Garcia, Amauri;
Rem: Revista Escola de Minas , 2002, DOI: 10.1590/S0370-44672002000100006
Abstract: the endogenous and exogenous non-metallic inclusions, which are normally present in steel, affect its castability and its mechanical properties. in the last decades, the control of amount, size, morphology and chemical composition of non-metallic inclusions has been extensively investigated, especially at the stage of refinement of steels. by controlling amount, size, distribution and chemical composition of inclusions, a steel product of better quality can be produced. to identify the nature of inclusions and the stages of the manufacturing process where they are formed is extremely important for the production of clean steels. the present work has as a main objective to investigate non-metallic inclusions in low carbon steel (sae 1015), killed by aluminum. a method, which uses the expedient of dissolving totally or partially the ferritic matrix, is used. a scanning electronic microscope (sem) connected to an energy-dispersive spectrometer system is then used to obtain, in a more accurate way, size, morphology and chemical composition of such inclusions without any interference caused by the ferritic matrix.
Avalia o do tamanho, da morfologia e da composi o química de inclus es n o metálicas em a o baixo carbono desoxidado ao alumínio
Pires José Carlos dos Santos,Fernandes Neto Marcolino,Garcia Amauri
Rem: Revista Escola de Minas , 2002,
Abstract: A presen a de inclus es n o metálicas endógenas e exógenas prejudica a lingotabilidade e as propriedades mecanicas dos a os. A busca contínua pelo controle da quantidade, do tamanho, da morfologia e da composi o química de inclus es n o metálicas tem sido tema de estudos nas últimas décadas, em especial durante o processo de refino secundário dos a os. Através do controle, principalmente, do tamanho e da composi o química das inclus es, é possível obter um produto final de boa qualidade. A identifica o da natureza e o controle da forma o de inclus es s o de suma importancia para a obten o de a os limpos. Este trabalho tem como objetivo fazer uma investiga o de inclus es n o metálicas em a o de baixo teor de carbono(SAE 1015), desoxidado ao alumínio, através de um método de dissolu o parcial e total da matriz metálica e posterior análise ao Microscópio Eletr nico de Varredura (MEV), acoplado a um sistema de análise por energia dispersiva (EDS), permitindo uma visualiza o do tamanho, da forma e da composi o química das inclus es com maior precis o, sem interferência da matriz ferrítica.
Candida parapsilosis complex water isolates from a haemodialysis unit: biofilm production and in vitro evaluation of the use of clinical antifungals
Pires, Regina Helena;Santos, Jaime Maia dos;Zaia, José Eduardo;Martins, Carlos Henrique Gomes;Mendes-Giannini, Maria José Soares;
Memórias do Instituto Oswaldo Cruz , 2011, DOI: 10.1590/S0074-02762011000600002
Abstract: candida parapsilosis, currently divided into three distinct species, proliferates in glucose-rich solutions and has been associated with infections resulting from the use of medical devices made of plastic, an environment common in dialysis centres. the aims of this study were (i) to screen for candida orthopsilosis and candida metapsilosis (100 environmental isolates previously identified as c. parapsilosis), (ii) to test the ability of these isolates to form biofilm and (iii) to investigate the in vitro susceptibility of candida spp biofilms to the antifungal agents, fluconazole (flc) and amphotericin b (amb). isolates were obtained from a hydraulic circuit collected from a haemodialysis unit. based on molecular criteria, 47 strains were re-identified as c. orthopsilosis and 53 as c. parapsilosis. analyses using a formazan salt reduction assay and total viable count, together with microscopy studies, revealed that 72 strains were able to form biofilm that was structurally similar, but with minor differences in morphology. a microtitre-based colorimetric assay used to test the susceptibility of fungal biofilms to amb and flc demonstrated that the c. parapsilosis complex displayed an increased resistance to these antifungal agents. the results from these analyses may provide a basis for implementing quality controls and monitoring to ensure the microbiological purity of dialysis water, including the presence of yeast.
Qualitative and quantitative analysis of environmental damages through instauration and registers of lawful documents
Cintra, Roberta Hehl de Sylos;Santos, José Eduardo dos;Moschini, Luiz Eduardo;Pires, José Salatiel Rodrigues;Henke-Oliveira, Carlos;
Brazilian Archives of Biology and Technology , 2006, DOI: 10.1590/S1516-89132006000700017
Abstract: a qualitative and quantitative analysis of the environmental damages occurrences was conducted through the lawful documents established for charging at the state prosecution service of s?o carlos city, state of s?o paulo, during 1991 - 2000, to understand the relationship between environmental problems and the current development actions. the environmental damage identified were grouped into nine classes, where deforestation was prevailing in each year along the period of study. of the total number of deforestation occurrences, 180 was related to areas smaller than 5 ha. it corresponded to 110.35 ha of the total deforested area. the other 37 were associated with areas higher than 5 ha, equivalent to 1,013.27 ha. the registers of environmental damages in the period in a rough estimate, corresponded to a mediam loss of 5.91 ± 4.14 ha/occurrence and of 112.36 ± 91.73 ha/year of deforested area.
The use of cyclosporine modifies the clinical and histopathological presentation of tuberculosis after renal transplantation
BIZ, Eloir;PEREIRA, Carlos Alberto Pires;MOURA, Luis Antonio Ribeiro de;SESSO, Ricardo;VAZ, Maria Lucia dos Santos;SILVA FILHO, Alvaro Pacheco;PESTANA, José Osmar Medina;
Revista do Instituto de Medicina Tropical de S?o Paulo , 2000, DOI: 10.1590/S0036-46652000000400008
Abstract: tuberculosis is one of the most frequent opportunistic infections after renal transplantation and occurred in 30 of 1264 patients transplanted between 1976 and 1996 at hospital s?o paulo - unifesp and hospital dom silvério, brazil. the incidence of 2.4% is five times higher than the brazilian general population. the disease occurred between 50 days to 18 years after the transplant, and had an earlier and worse development in patients receiving azathioprine, prednisone and cyclosporine, with 35% presenting as a disseminated disease, while all patients receiving azathioprine and prednisone had exclusively pulmonary disease. ninety percent of those patients had fever as the major initial clinical manifestation. diagnosis was made by biopsy of the lesion (50%), positivity to m. tuberculosis in the sputum (30%) and spinal cerebral fluid analysis (7%). duration of treatment ranged from 6 to 13 months and hepatotoxicity occurred in 3 patients. the patients who died had a significant greater number of rejection episodes and received higher doses of corticosteroid. in conclusion, the administration of cyclosporine changed the clinical and histopathological pattern of tuberculosis occurring after renal transplantation.
Abdominal angiostrongyliasis: a case with severe evolution
Santos, José Wellington Alves dos;Zambenedetti, Ricardo Morgental;Mann, Keli Cristina;Rocha, Marta Pires da;Morais, Ewerton Nunes;Graeff-Teixeira, Carlos;
Revista do Instituto de Medicina Tropical de S?o Paulo , 2005, DOI: 10.1590/S0036-46652005000600010
Abstract: a case of acute abdomen disease caused by abdominal angiostrongyliasis is reported. a 42-year-old otherwise healthy patient presented with a complaint of nine days of abdominal pain, constipation, disury, fever and right iliac fossa palpable mass. exploratory laparotomy was performed. after surgical treatment the patient presented serious complications.
Resistência de progênies de cacaueiro à murcha-de-Ceratocystis
Silva, Stela Dalva Vieira Midlej;Pinto, Luiz Roberto Martins;Oliveira, Bruno Ferreira de;Damaceno, Virginia Oliveira;Pires, José Luis;Dias, Carlos Tadeu dos Santos;
Tropical Plant Pathology , 2012, DOI: 10.1590/S1982-56762012000300005
Abstract: seedlings from open-pollinated progenies of 20 clones of cocoa (theobroma cacao) were inoculated with the fungus ceratocystis cacaofunesta, the causal agent of ceratocystis wilt, and their response was assessed based on the percentage of dead plants. open pollinated progeny of clones tsh1188 and vb1151 were used as standards for resistance, while ccn51 and sj02 for susceptibility. contrasts between these benchmarks and the progenies studied were estimated and evaluated by dunnett's t test (α= 0.05). the progenies showed different responses to c. cacaofunesta, and it was possible to classify them into three groups: resistant (fcb01, csg70, boba01, vb902, tsh1188, vb1151, ps1319 and mac01), moderately susceptible (hw25, pm02, fa13, ph15, m05 and bj11) and susceptible (ccn51, fb206, ph16, sj02, ccn10 and fsu77).
Influência do fósforo e de diferentes regimes de corte na produtividade e no perfilhamento do capim-de-raiz (Chloris orthonoton Doell)
Oliveira, Tatiana Neres de;Paz, Luiz Gonzaga da;Santos, Mércia Virginia Ferreira dos;Dubeux Júnior, José Carlos Batista;Ferreira, Rinaldo Luiz Caraciolo;Pires, Aureliano José Vieira;Silva, Maria da Concei??o;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000100009
Abstract: the work was carried out in a greenhouse, at the animal science department/ufrpe, from october 2000 to may 2001, to evaluate the effect of phosphorus fertilization and different cut systems on the productivity and tillering of the capim-de-raiz (chloris orthonoton, doell). the experimental design was completely randomized, distributed in a factorial arrangement 3 x 2 x 2, being three levels of application of phosphorus fertilizer (0, 100 and 200 kg/ha of p2o5), two cut frequencies (30 and 40 days) and two cut intensities (5 and 15 cm). significant interaction between cut frequency and cut intensity as well as phosphorus fertilization and cut frequency for the dm yield was observed. the best combination between cut frequency and cut intensity was 40 days and 5 cm, respectively, with 10.66 g/pot of dm. the phosphorus fertilization showed higher efficacy when the cut frequency was 40 days (11.70 g/pot of dm). phosphorus fertilization, cut frequency and cut intensity showed significant effect on the tillering process.
Influência do fósforo e do regime de corte na composi??o química e digestibilidade in vitro do capim-de-raiz (Chloris orthonoton Doell)
Oliveira, Tatiana Neres de;Paz, Luiz Gonzaga da;Santos, Mércia Virginia Ferreira dos;Dubeux Júnior, José Carlos Batista;Ferreira, Rinaldo Luiz Caraciolo;Araújo, Gherman Garcia Leal de;Pires, Aureliano José Vieira;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000900010
Abstract: the research was carried out in a greenhouse, at the ufrpe, from october 2000 to may, 2001. the objective was to evaluate the effect of phosphatic fertilization and harvest systems on the chemical composition and in vitro digestibility of the "capim-de-raiz" (chloris orthonoton doell). the treatments was obted in a factorial arrangement 3 x 2 x 2, with three rates of phosphorus fertilizer (0, 100 and 200 kg ha-1 of p2o5), two cut frequencies (30 and 40 days) and two cut intensities (5 and 15 cm) distributed in the design was a completely randomized with four replications. plants without phosphorus fertilizer presented the highest cp concentration (102.3 g kg-1). the highest ndf values were obtained in the plants cut at 15 cm (750.3 g kg-1). the highest adf concentration values were found in the plants cut at 30 days of regrowth (389.8 g kg-1). the phosphorus concentration in the plant tops was influenced by the phosphatic fertilization rates, cut frequencies and cut intensities. plants without p fertilizer presented the highest in vitro dry matter digestibility.
Inferências sobre atividade rizosférica de espécies com potencial para fitorremedia??o do herbicida tebuthiuron
Pires, Fábio Ribeiro;Souza, Caetano Marciano de;Cecon, Paulo Roberto;Santos, José Barbosa dos;Tótola, Marcos Rogério;Procópio, Sergio de Oliveira;Silva, Antonio Alberto da;Silva, Carlos Shigeaky Weky;
Revista Brasileira de Ciência do Solo , 2005, DOI: 10.1590/S0100-06832005000400015
Abstract: the rhizospheric microbial action, accelerating the degradation of compounds in the soil, is known as phytostimulation. it represents one of the main phytoremediation mechanisms in herbicide-contaminated soil. tebuthiuron-tolerant plants, which are able to stimulate their rhizospheric microorganisms, could be highly interesting for the phytoremediation of this herbicide. this study aimed at evaluating the rhizospheric activity of four plant species with phytoremediation potential for tebuthiuron and to infer on the contribution of the roots to the process of decontamination of this herbicide. the rhizospheric soil of jackbean (canavalia ensiformis), pearl millet (pennisetum glaucum), georgia velvet bean (stizolobium deeringianum), and black velvet bean (stizolobium aterrimum), plus a control treatment (without plant) were analyzed without and with tebuthiuron at 0.73 ìg g-1. the co2 evolution rate was quantified 1, 2, 3 and 10 days after the treatment application. the herbicide treatments were submitted to contamination with 40 ìg g-1 tebuthiuron. after the application, the co2 evolution rate was measured 1 and 50 days after the treatment applications, using a continuous flow respirometer. compared to the other species and the control treatment, c. ensiformis presented the highest co2 evolution rate throughout the experimental phase, followed by s. aterrimum at the commercial herbicide dose. under higher herbicide concentrations, mean co2 evolution rate values were higher in rhizospheric soil of c. ensiformis, followed by that from s. aterrimum and s. deeringianum. c. ensiformis presented the best performance, and except for this plant species, the rhizospheric contribution to the tebuthiuron phytoremediation at levels above the commercial dose was not relevant.
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