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Search Results: 1 - 10 of 15251 matches for " Mario Brito "
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Searching for the Lost Ostium: A Morphometric Analysis of the Ureteral Ostia Distribution in Normal and Thickened Bladders and Its Applications in Endourology  [PDF]
Mariana Greco, Paula Marsillac, Julia Vieira, Mario Brito, Andre Saud, Rafael Prinz, Joao Pereira-Correia
Open Journal of Urology (OJU) , 2013, DOI: 10.4236/oju.2013.33028
Abstract:

Introduction: The ureteral ostia may not be easily identified in urological endoscopic procedures, leading to an incomplete diagnosis of urinary tract diseases or a predisposition to iatrogenic lesions. The purpose of our study is to evaluate the anatomical distribution of ureteralostia in normal bladders and those with thickened walls. Materials and Methods: We dissected 30 vesical-prostate blocks from human cadavers and identified the ostia of the bladder trigone. A computerized morphometric analysis was performed to measure the thickness of the detrusor muscle, the distances between the ureteral ostia themselves and the distances between each ureteral ostium (left—LUO and right—RUO) and the internal urethral ostium (IUO). The angle formed between the IUO and LUO/RUO was also recorded as well as the volume of the prostates. Results: Fifteen bladders with a non-thickened detrusor (<5 mm) as well as 15 bladders with muscular thickening (>6 mm) were identified. The average prostatic volume of the dissected blocks was 23.7 cm3. The distance between ureteral ostia, the distance from IUO to LUO, the distance from IUO to RUO and the angle formed between IUO and LUO/RUO in normal and thickened bladder were, respectively, 1.9 cm/2.2 cm (p = 0.09), 1.6 cm/1.6 cm (p = 0.82), 1.6 cm/1.7 cm (p = 0.79) and 77/91 (p = 0.17). Conclusions: Our study shows that there is no significant difference in the position of bladder ostia in healthy and thickened bladders. We believe that our findings may facilitate locating the ureteral orifices in situations where endoscopic identification is difficult.

Late Cretaceous Belonostomus (Pisces, Actinopterygii, Aspidorhynchidae) from Algarrobo, Chile, with comments on aspidorhynchid paleodistribution in South America
Brito,Paulo M; Suárez,Mario E;
Revista geológica de Chile , 2003, DOI: 10.4067/S0716-02082003000100008
Abstract: aspidorhynchid remains are described from the upper cretaceous quiriquina formation of chile. although only fragments have been recovered, their characteristics allow to identify them as belonostomus longirostris lambe. this is the first record of this genus confirmed in chile. b. longirostris lambe had a south american/pacific marginal pattern of distribution, showing more affinities with the north american fauna than to the south american atlantic one.
Late Cretaceous Belonostomus (Pisces, Actinopterygii, Aspidorhynchidae) from Algarrobo, Chile, with comments on aspidorhynchid paleodistribution in South America
Paulo M Brito,Mario E Suárez
Revista geológica de Chile , 2003,
Abstract: Aspidorhynchid remains are described from the Upper Cretaceous Quiriquina Formation of Chile. Although only fragments have been recovered, their characteristics allow to identify them as Belonostomus longirostris Lambe. This is the first record of this genus confirmed in Chile. B. longirostris Lambe had a South American/Pacific marginal pattern of distribution, showing more affinities with the North American fauna than to the South American Atlantic one. Belonostomus (Pisces, Actinopterygii, Aspidorhynchidae) del Cretácico Superior de Algarrobo, Chile, con comentarios sobre la paleodistribución de los aspidorhínchidos en América del Sur. Se describen los restos de un aspidorhínchido recolectado en estratos de la Formación Quiriquina, Cretácico Superior. Las características de tales restos son suficientes para permitir su identificación como Belonostomus longirostris Lambe. Este es el primer registro confirmado de este género en Chile. B. longirostris Lambe tuvo un modelo de distribución marginal en el Pacífico de América del Sur mostrando más afinidad con la fauna de América del Norte que con la fauna atlántica de América del Sur.
OBTENTION OF POWDERED CERAMIC MATERIAL BY PYROLYSIS OF POLY [(DIMETHYLSILOXANE)-CO-(DIMETHYLSILAZANE)] COPOLYMERS AS PRECURSORS
RODRíGUEZ-BAEZA,MARIO; TRUJICHETT BRITO,MARíA JOSé;
Journal of the Chilean Chemical Society , 2006, DOI: 10.4067/S0717-97072006000200015
Abstract: a series of new poly(siloxane) and poly(silazane) derivates were synthesized by cationic ring opening mass copolymerization of the cyclic monomers octamethylcyclotetrasiloxane and hexamethylcyclotrisilazane, obtaining poly[(dimethylsiloxane)-co-(dimethylsilazane) ] copolymers with different concentrations of the comonomer units. the molar masses of the soluble fractions of the copolymers and of the macrocycles generated in the copolymerization reaction medium, were determined by gel permeation chromatography. thermogravimetric analysis shows that poly(dimethylsiloxane) is more stable than the copolymers and the homopolymer poly(dimethylsilazane). differential scanning calorimetry of poly(dimethylsilazane) presents a melting endotherm, indicating that this homopolymer is crystalline. the copolymers were characterized by ft-ir and 1h and 13c nmr spectroscopy.. the polymers were thermally cured and pyrolysed, obtaining ceramic powder. the morphology of the ceramic powder, studied by scanning electronic microscopy, corresponds to highly uniform spherical particles. the ceramic material was characterized by ft-ir. it was shown that these cyclic monomers copolymerize and that they constitute pre-polymer precursors of the powdered ceramic material since the products have si, c, n and o atoms
Transesterification, Some Applications and Biodiesel Production [A Rea o de Transesterifica o, Algumas Aplica es e Obten o de Biodiesel]
Simoni P. Meneghetti,Mario Roberto Meneghetti,Yariadner C . Brito
Revista Virtual de Química , 2013,
Abstract: Transesterification is a transformation with important industrial applications in areas related with polymers, coats, and fuels (fatty acids alkyl esters, biodiesel). This reaction occurs in the presence of catalysts and it is very important to control both the process parameters and the quality of raw materials. In this work the general remarks about transesterification and some examples of industrial processes based on this reaction are discussed, focusing on biodiesel production.
High abundance of Serine/Threonine-rich regions predicted to be hyper-O-glycosylated in the secretory proteins coded by eight fungal genomes
González Mario,Brito Nélida,González Celedonio
BMC Microbiology , 2012, DOI: 10.1186/1471-2180-12-213
Abstract: Background O-glycosylation of secretory proteins has been found to be an important factor in fungal biology and virulence. It consists in the addition of short glycosidic chains to Ser or Thr residues in the protein backbone via O-glycosidic bonds. Secretory proteins in fungi frequently display Ser/Thr rich regions that could be sites of extensive O-glycosylation. We have analyzed in silico the complete sets of putatively secretory proteins coded by eight fungal genomes (Botrytis cinerea, Magnaporthe grisea, Sclerotinia sclerotiorum, Ustilago maydis, Aspergillus nidulans, Neurospora crassa, Trichoderma reesei, and Saccharomyces cerevisiae) in search of Ser/Thr-rich regions as well as regions predicted to be highly O-glycosylated by NetOGlyc (http://www.cbs.dtu.dk). Results By comparison with experimental data, NetOGlyc was found to overestimate the number of O-glycosylation sites in fungi by a factor of 1.5, but to be quite reliable in the prediction of highly O-glycosylated regions. About half of secretory proteins have at least one Ser/Thr-rich region, with a Ser/Thr content of at least 40% over an average length of 40 amino acids. Most secretory proteins in filamentous fungi were predicted to be O-glycosylated, sometimes in dozens or even hundreds of sites. Residues predicted to be O-glycosylated have a tendency to be grouped together forming hyper-O-glycosylated regions of varying length. Conclusions About one fourth of secretory fungal proteins were predicted to have at least one hyper-O-glycosylated region, which consists of 45 amino acids on average and displays at least one O-glycosylated Ser or Thr every four residues. These putative highly O-glycosylated regions can be found anywhere along the proteins but have a slight tendency to be at either one of the two ends.
OBTENTION OF POWDERED CERAMIC MATERIAL BY PYROLYSIS OF POLY [(DIMETHYLSILOXANE)-CO-(DIMETHYLSILAZANE)] COPOLYMERS AS PRECURSORS
MARIO RODRíGUEZ-BAEZA,MARíA JOSé TRUJICHETT BRITO
Journal of the Chilean Chemical Society , 2006,
Abstract: A series of new poly(siloxane) and poly(silazane) derivates were synthesized by cationic ring opening mass copolymerization of the cyclic monomers octamethylcyclotetrasiloxane and hexamethylcyclotrisilazane, obtaining poly[(dimethylsiloxane)-co-(dimethylsilazane) ] copolymers with different concentrations of the comonomer units. The molar masses of the soluble fractions of the copolymers and of the macrocycles generated in the copolymerization reaction medium, were determined by gel permeation chromatography. Thermogravimetric analysis shows that poly(dimethylsiloxane) is more stable than the copolymers and the homopolymer poly(dimethylsilazane). Differential scanning calorimetry of poly(dimethylsilazane) presents a melting endotherm, indicating that this homopolymer is crystalline. The copolymers were characterized by FT-IR and 1H and 13C NMR spectroscopy.. The polymers were thermally cured and pyrolysed, obtaining ceramic powder. The morphology of the ceramic powder, studied by scanning electronic microscopy, corresponds to highly uniform spherical particles. The ceramic material was characterized by FT-IR. It was shown that these cyclic monomers copolymerize and that they constitute pre-polymer precursors of the powdered ceramic material since the products have Si, C, N and O atoms
Total hepatic ischemia and reperfusion after state controlled hemorrhagic shock, with used of different solutions: effects of neutrophils sequestration in kidney of rats
Hirano, Elcio Shiyoiti;Mantovani, Mario;Morandin, Rosana Celestina;Brito, Jarbas de;Pavani, Lilian;
Acta Cirurgica Brasileira , 2006, DOI: 10.1590/S0102-86502006000100008
Abstract: purpose: to evaluate and compare neutrophils sequestration in the renal cortex of rats, result of total hepatic ischemia and reperfusion after controlled hemorrhagic shock, with use of different electrolytic solutions. methods: used 18 rats wistar, males, adult, divided into three groups as the solution used to reanimation: group pss: physiologic saline solution; group hss: hypertonic saline hypertonic (7,5%) followed by lactated ringer's solution; group lrs: lactated ringer's solution. all the animals were submitted to the bleeding controlled until mean arterial pressure (map) 40 mmhg, for 20 minutes. performed volemic replacement until pam=80 mmhg with the solution according the studied group, followed by laparotomy and pringle's maneuver for 15 minutes. the animals were accompanied until for two hours. to statistical comparisons between mean of neutrophils sequestration, in interstitium of the renal cortex, were made the tests one-way anova and covariance analysis, adjusting itself for time of supervened. the hemodynamic parameters evaluated were: map, heat rate, cardiac index, vascular resistance system index. the analyzed metabolic variables were: ph, bicarbonate, base deficit and lactato, besides electrolytes. results: the mean values of supervened, in minutes, for group were: group pss 79,0±12,0; group lrs 97,0±11,0; group hss 67,0±10. the mean values of neutrophils/field in the renal cortex were: group pss 0,55±0,68; group lrs 1,68±0,53; group hss 1,33±0,43. when adjusted for time of supervened: group pss 0,55; group lrs 1,62; group hss 1,39. there was statistically significant difference in neutrophils sequestration, between group pss regarding the others groups, using itself or not the adjustment by time of supervened (p=0,016 and p=0,0128). conclusion: both critical situations in this model, controlled hemorrhagic shock followed by pringle's maneuver, promoted neutrophils sequestration in the interstitium renal of rat, and the physiologic saline solution
Qualidade do percolado de solos que receberam vinha?a em diferentes doses e tempo de incuba??o
Brito, Fabio L.;Rolim, Mario M.;Silva, Jose A. A. da;Pedrosa, Elvira M. R.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2007, DOI: 10.1590/S1415-43662007000300012
Abstract: the objective of this study was to evaluate the quality of percolation from three soil classes that received vinasse doses with different incubation times. the soils, classified as haplic nitosol, yellow argisol and carbic spodosol, were reproduced in twenty-seven 20 × 110 cm pvc columns (diameter × height) with horizons, thickness and densities similar to original soil. the soils were treated with vinasse doses equivalent to 0 (control), 350 and 700 m3 ha-1, and submitted to 30 and 60 days incubation. the collected effluents were analyzed for bod5, cod, ec, tds and ph. the results indicated that variations in the analyzed parameters, due to vinasse application in the soil, do not bring concerns in relation to environmental quality. despite different textures and consequently, different physiochemical properties, the comparison of percolates with natural vinasse data indicated that the soils presented high retention power, reducing the possibility of this waste causing pollution to the subsurface waters.
Total hepatic ischemia and reperfusion after state controlled hemorrhagic shock, with used of different solutions: effects of neutrophils sequestration in kidney of rats
Hirano Elcio Shiyoiti,Mantovani Mario,Morandin Rosana Celestina,Brito Jarbas de
Acta Cirurgica Brasileira , 2006,
Abstract: PURPOSE: To evaluate and compare neutrophils sequestration in the renal cortex of rats, result of total hepatic ischemia and reperfusion after controlled hemorrhagic shock, with use of different electrolytic solutions. METHODS: Used 18 rats Wistar, males, adult, divided into three groups as the solution used to reanimation: Group PSS: physiologic saline solution; Group HSS: hypertonic saline hypertonic (7,5%) followed by lactated ringer's solution; Group LRS: lactated ringer's solution. All the animals were submitted to the bleeding controlled until mean arterial pressure (MAP) 40 mmHg, for 20 minutes. Performed volemic replacement until PAM=80 mmHg with the solution according the studied group, followed by laparotomy and Pringle's Maneuver for 15 minutes. The animals were accompanied until for two hours. To statistical comparisons between mean of neutrophils sequestration, in interstitium of the renal cortex, were made the tests One-way ANOVA and covariance analysis, adjusting itself for time of supervened. The hemodynamic parameters evaluated were: MAP, heat rate, cardiac index, vascular resistance system index. The analyzed metabolic variables were: pH, bicarbonate, base deficit and lactato, besides electrolytes. RESULTS: The mean values of supervened, in minutes, for group were: Group PSS 79,0?12,0; Group LRS 97,0?11,0; Group HSS 67,0?10. The mean values of neutrophils/field in the renal cortex were: Group PSS 0,55?0,68; Group LRS 1,68?0,53; Group HSS 1,33?0,43. When adjusted for time of supervened: Group PSS 0,55; Group LRS 1,62; Group HSS 1,39. There was statistically significant difference in neutrophils sequestration, between Group PSS regarding the others groups, using itself or not the adjustment by time of supervened (p=0,016 and p=0,0128). CONCLUSION: Both critical situations in this model, controlled hemorrhagic shock followed by Pringle's maneuver, promoted neutrophils sequestration in the interstitium renal of rat, and the physiologic saline solution demonstrated minor mean, differentiating statistically of the others solutions.
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