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Search Results: 1 - 10 of 147391 matches for " Luciano Rodrigo Gomes;Le?o "
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Oxida??o de sulfetos de níquel com microorganismos mesófilos
Santos, Luciano Rodrigo Gomes;Barbosa, Alexandre Ferraz;Souza, Adelson Dias;Leo, Versiane Albis;
Rem: Revista Escola de Minas , 2008, DOI: 10.1590/S0370-44672008000100008
Abstract: metallic sulphide oxidation has been associated to the generation of acid mine drainage, one of the most import environmental issues in the mining industry. bioleaching can be applied to accelerate sulphide oxidation, ceasing these impacts. this work sought to study the biooxidation of a complex nickel-iron sulphide (pentlandite and pyrrhotite) using acidophile iron-oxidizing bacteria. the effects of ph and solids concentration on the extraction of nickel were evaluated. a high nickel extraction (around 60%) can be achieved confirming the feasibility of nickel sulphide bioleaching. the ph has a negligible effect on nickel extraction being ph 2.0 the best value. nickel dissolution can be achieved at high solid percentages since gaseous transfer in the system is not strongly affected. it is suggested therefore that sulphide dissolution under these conditions is limited by the availability of carbon dioxide in the leaching system, which controls bacterial growth.
Adsor??o de metais pesados em serragem de madeira tratada com ácido cítrico
Rodrigues, Rafael Falco;Trevenzoli, Rafael Lopes;Santos, Luciano Rodrigo Gomes;Leo, Versiane Albis;Botaro, Vagner Roberto;
Engenharia Sanitaria e Ambiental , 2006, DOI: 10.1590/S1413-41522006000100004
Abstract: in the present work, the exchange capacity of manilkara longifolia sawdust, chemically modified, was studied. the modification was carried out by a chemical treatment with citric acid, which introduced carboxilate groups in the material surface. the introduction of these groups was confirmed by infrared spectroscopy. cadmium and copper sorption was studied batchwise. isotherms were drawn and adjusted to the langmuir model. maximum loadings of 0.56 mmolcd/g and 0.94 mmolcu/g were achieved in single metal adsorption. cadmium uptake was reduced from 0.56 mmolcd/g to 0.21 mmolcd/g as the copper concentration increased in the reaction system. these results show that there is a competition between the two metals for the exchange sites.
Analysis of Cookiecutter shark Isistius spp. (Squaliformes; Dalatiidae) bites in cetaceans (Mammalia; Cetacea) on the Bahia coast, northeastern Brazil
Luciano Raimundo Alardo Souto,Janete Gomes Abr?o Oliveira,José de Anchieta Cintra da Costa Nunes,Rodrigo Maia-Nogueira
Biotemas , 2007,
Abstract: Few studies have registered signs of mutilation on cetaceans in Brazil, especially from shark attacks. This work describes interactions between cookiecutter sharks Isistius spp. and cetaceans through the analysis of bite records for cetacean carcasses washed ashore on the Bahia coast between 1996 and 2005. Twenty bite records were analyzed in 13 cetacean species, of which the Delphinidae family was the most frequent. After the analysis, Isistius plutodus was identified as the aggressor species on 80% of the records, followed by I. brasiliensis (20%), based on the characteristic shape of the mutilations. The areas most subject to attack in cetaceans were: flanks 40%; head and abdomen 20% each; dorsal 15%; and genital with 5%. The relatively high number of bites on the flanks was probably due to its larger area, which offered greater opportunities to the cookiecutter shark. At least three bite records were related to the possible causes of strandings in delphinids. We recommend further studies on interactions between sharks and cetaceans along the Brazilian coast.
Avalia??o do diagnóstico e tratamento em parada cardiorrespiratória entre os médicos com mais de cinco anos de gradua??o
Barbosa, Fabiano Timbó;Barbosa, Luciano Timbó;Silva, Andréa de Lima;Silva, Kleyner Leo Gomes da;
Revista Brasileira de Terapia Intensiva , 2006, DOI: 10.1590/S0103-507X2006000400009
Abstract: background and objectives: new resuscitation guidelines contain significant changes intended to improve resuscitation practice and survival from cardiac arrest. the objective of this study was to evaluate the theoretical knowledge about cardiac arrest (ca) and cardiac and pulmonary resuscitation (cpr) among doctors after five years of the graduation. methods: the questionnaire survey was conducted in an emergency hospital in the state of alagoas. the population was composed of doctors with five years after your graduation. the data was collected with a questionnaire with questions about the theme. the results were analyzed based on bibliographies about ca and cpr. results: thirty-nine professionals answered the questionnaire. the ca diagnostic was correct in 76.9% and increased to 82.7 when the case report was included. questions about sodium bicarbonate and vasopressin were correctly answered by 30.8% and 15.4% of the participants. conclusions: the greatest difficulty reported in this study was on the ca arrest most of the participants of the survey are not aware of the correct indications of vasopressin and sodium bicarbonate in the cpr. according to this study, a continuing medical education program on cpr for physicians with more than five years of graduations warranted.
Terapia nutricional e sepse neonatal
Freitas, Brunnella Alcantara Chagas de;Leo, Renata Teixeira;Gomes, Andréia Patrícia;Siqueira-Batista, Rodrigo;
Revista Brasileira de Terapia Intensiva , 2011, DOI: 10.1590/S0103-507X2011000400015
Abstract: this article reviews the current understanding of enteral and parenteral nutrition therapy in preterm infants, with an emphasis on very low birth weight babies. the protective effects of nutrition therapy against neonatal sepsis and necrotizing enterocolitis are discussed. different methods of feeding preterm infants are evaluated. special attention is given to the problems of very low birth weight babies and the protective effects of nutrition to counteract complications, especially infection. the preferential use of breast milk for enteral nutrition, the management of protein and energy offers, the use of early and minimal enteral nutrition, the early introduction of parenteral nutrition (within the first 24 hours of life) and the use of immunonutrients that are appropriately supported by a sufficient number of studies can provide good adjuvant therapy guidelines to prevent neonatal sepsis and necrotizing enterocolitis. however, we conclude that additional multicenter, randomized controlled studies are necessary to clarify the protective role of nutrition in preterm infants. appropriate nutrition is not only effective in treating and preventing infective complications, but it also promotes neurodevelopment and prevents future harmful consequences.
Edema pulmonar por press?o negativa após extuba??o traqueal: relato de caso
Barbosa, Fabiano Timbó;Barbosa, Luciano Timbó;Almeida, Jadielson Higino de;Silva, Kleyner Leo Gomes da;Brand?o, Roberta Ribeiro Marques;Santos, Leyna Leite;
Revista Brasileira de Terapia Intensiva , 2007, DOI: 10.1590/S0103-507X2007000100017
Abstract: background and objectives: negative pressure pulmonary edema after acute upper airway obstruction is a well-described event, thought infrequently diagnosed and reported. this report aimed at presenting a case of postextubation negative pressure pulmonary edema refractory to use of diuretics and with successful therapeutic after using positive pressure noninvasive mechanic ventilation. case report: a 22-year-old-woman underwent an operation to opened colecistectomy. the preoperative exams were abnormality us. immediately after the extubation the patient presented with dyspnea and lungs stertors. the treatment for the acute pulmonary edema started with oxygen therapy under venturi mask, lifting up chest and diuretic. the patient was transferred to intensive care unit due to the lack of success with the treatment. a noninvasive ventilation (niv) was started with support pressure of 15 cmh2o and peep of 5 cmh2o with resolution of symptoms. the patient was maintained under observation for 24 hours after the event with good conditions and received discharge to room without symptoms. conclusions: negative pressure pulmonary edema (nppe) is a difficult diagnosed event and it must be always considered when patient develop with symptoms and signals of respiratory insufficiency postextubation. in our case was possible to treat with positive pressure non-invasive mechanical ventilation, but in case of the niv failure the tracheal intubation and the invasive mechanical ventilatory support be initiated to improve the oxygen levels of the patient.
Effect of player substitutions on the intensity of second-half soccer match play
Coelho, Daniel Barbosa;Coelho, Leonardo Gomes Martins;Morandi, Rodrigo Figueiredo;Ferreira Junior, Jo?o Batista;Marins, Jo?o Carlos Bouzas;Prado, Luciano Sales;Soares, Danusa Dias;Silami-Garcia, Emerson;
Revista Brasileira de Cineantropometria & Desempenho Humano , 2012, DOI: 10.5007/1980-0037.2012v14n2p183
Abstract: most soccer matches are conducted by coaches who usually make all player substitutions allowed. therefore, it is extremely important to study these substitutions and their effects on the intensity of effort required from players. to date, no published studies have reported on this topic using heart rate (hr) as an intensity parameter. the objective of this study was to compare effort intensity (ei) of soccer players in the following situations: 1) first half (fh-ei); 2) second half (sh-ei); 3) second half with substitutions (shs-ei). forty-five male soccer players (18.5±1.2 years old, 74.25±5.79 kg, 182.6±8.55 cm, 9.56±2.47% body fat, 56.3±4.3 mlo2/kg/min) were evaluated during 29 official games. ei was considered as the mean hr, expressed as the percentage of each player's maximal hr (%hrmax) and as the time spent in each intensity zone (z) according to %hrmax (z1<70%; z2 70-85%; z3 85-90%; z4 90-95%; z5 95-100%). fh-ei (86.3±3.3%hrmax) was higher than sh-ei (80.6±4.4%hrmax) and shs-ei (83.6±2.8%hrmax). shs-ei was higher than sh-ei (p<0.05). time spent in high-intensity zones was lower in sh-ei than in fh-ei, but higher in shs-ei when compared to sh-ei (p<0.05). it was concluded that the decrease in ei in the second half of soccer matches was attenuated by substitutions made at halftime, as evidenced by a longer time spent in high-intensity zones when compared to sh-ei.
Effectiveness of adding vildagliptin to the treatment of diabetic patients nonresponsive to the combination of metformin and a sulphonylurea
Vilar, Lucio;Gusm?o, Amaro;Albuquerque, José Luciano;Pontes, Lisete;Montenegro, Larissa;Pontes, Soraya;Ibiapina, George Robson;Cunha, Rodrigo Andrade;Alves, Gercivan dos Santos;Canadas, Viviane;Ferreira, Vera Maria Santos G.;Nóbrega, Lucia Helena Coelho;Lima, Josivan Gomes de;
Arquivos Brasileiros de Endocrinologia & Metabologia , 2011, DOI: 10.1590/S0004-27302011000400004
Abstract: objective: to evaluate the effectiveness of adding vildagliptin to the treatment of patients with inadequately controlled type 2 diabetes mellitus (t2dm) treated with a combination of metformin and a sulphonylurea. subjects and methods: 37 t2dm patients with hba1c ranging from 7.7% to 12.4% (mean of 9.30 ± 1.38), despite the use of metformin in combination with a sulphonylurea, were additionally treated with vildagliptin (100 mg/day) for at least 6 months. results: during triple oral therapy (tot) hba1c levels < 7% were achieved in 11 patients (29.7%), whereas levels of fasting plasma glucose (fpg) < 120 mg/dl were observed in 12 patients (32.4%). both findings were observed in 10 patients (27.0%). compared to nonresponsive subjects, lower mean baseline hba1c and fpg levels were seen in responsive patients, but the difference was only statistically significant for fasting plasma glucose (fpg). moreover, there was considerable overlap between the two groups. conlusion: our preliminary results suggest that tot with metformin, a sulphonylurea and vildagliptin may be useful for some t2dm patients nonresponsive to combination therapy with metformin and sulphonylurea.
Correla??o entre resistência carotídea e autonomia funcional de mulheres idosas
Meneses, Yúla Pires da Silveira Fontenele de;Cabral, Patrícia Uchoa Leit?o;Abreu, Flávia Maria Campos;Vale, Rodrigo Gomes de Souza;Rocha, Francisca Cecília Viana;Andrade, Arméle Dornelas de;
Revista Brasileira de Enfermagem , 2007, DOI: 10.1590/S0034-71672007000400004
Abstract: this study had as objective to correlate the resistance of the carotid artery and the functional autonomy of old women. the resistance of the carotid artery was evaluated through the method called doppler and the functional autonomy through tests related to daily activities (protocol gdlam). in the description of the data it was used measures of localization and dispersion. the internal right carotid resistance got mean and pattern deviation respectively (0,71 ± 0,07) and functional autonomy mean and pattern deviation respectively (30,40 ± 6,31). the coefficient of the correlation of spearman showed a strong association between the variation of the study (r = 0,998; p = 0,000). the results suggest that the bigger the table of contents of the resistance of the carotid artery is the bigger will be the difficulty of execution of the daily life tasks.
A Coopera o Transgovernamental Financeira na Regula o do Mercado de Capitais
Luciano Vaz Ferreira,Marcelo Leo Lucietto
Scientia Iuris , 2012,
Abstract: O objetivo do artigo é estudar a regula o transnacional de quest es financeiras, especialmente no que diz respeito ao mercado de capitais. De modo a conferir maior efetividade às práticas estatais regulatórias, prop em-se a utiliza o de um novo paradigma teórico, o transgovernamentalismo. A ado o dessa teoria permite uma verdadeira revolu o no campo da coopera o internacional financeira, tornando a comunica o entre entidades regulatórias mais técnica e eficiente.
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