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Search Results: 1 - 10 of 205450 matches for " Jesus Ant?nio de Carvalho et al. "
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Análise histológica da cicatriza o de feridas cutaneas experimentais sob a o do laser de baixa potência =Histological analysis of experimental wound healing under the action of low power laser
Abreu, Jesus Antnio de Carvalho et al.
Scientia Medica , 2011,
Abstract: Objetivos: verificar histologicamente a cicatriza o de feridas cutaneas experimentais em Rattus norvergicus quando empregado o laser de baixa potência. Métodos: foram utilizados 45 animais machos, distribuídos em três grupos conforme a terapêutica adotada (n o tratados, tratados com laser na dose de 4 J/cm2 e tratados com laser na dose de 8 J/cm2), os quais foram divididos em três subgrupos conforme o período de eutanásia (7, 14 e 21 dias). Foi removido um fragmento cutaneo de 2 cm de diametro do dorso de cada animal e a cada 24 horas foi irradiado laser nos fragmentos dos grupos tratados, com a dose estabelecida previamente. Resultados: aos sete dias após o experimento, os grupos irradiados com laser de baixa potência apresentaram uma reepiteliza o mais eficiente quando comparados ao grupo n o tratado. Além disso, os grupos tratados com laser apresentaram uma deposi o de colágeno mais acentuada quando transcorridos 14 dias. A dose ajustada em 4 J/cm2 foi mais efetiva. Conclus es: o laser de baixa potência otimizou o processo de cicatriza o de feridas cutaneas experimentais em Rattus norvergicus. A dose ajustada em 4 J/cm2 foi mais efetiva. Aims: To assess histologically the healing of experimental skin wounds in Rattus norvergicus using low-power laser. Methods: Forty-five males were divided into three groups according to the adopted therapy (untreated, treated with laser at a dose of 4 J/cm2 and treated with laser at a dose of 8 J/cm2), which were divided into three subgroups according to time of euthanasia (7, 14 and 21 days). A fragment of 2 cm in diameter of skin was removed from the back of each animal, and laser was irradiated every 24 hours in the fragments of the treated groups, with the previously established dose. Results: At seven days after the experiment, the low-power laser irradiated groups showed a more efficient reepithelialization when compared with the untreated group. Furthermore, the groups treated with laser showed a more marked deposition of collagen at 14 days. Dose adjusted in 4 J/cm2 was more effective. Conclusions: Low-power laser has enhanced the healing of experimental skin wounds in Rattus norvergicus. The adjusted dose in 4 J/cm2 was more effective.
Perception of Growth Condition in the University from the Perspective of Freshmen Students  [PDF]
Ana Paula Moreno Pinho, Antnio Virgílio Bittencourt Bastos, Angra Valesca Almeida de Jesus, Rebeca Aurélio Martins, Laís Carvalho Dourado
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.62014
Abstract: This study aims to analyze and assess the perceptions that freshmen students recent graduating from high school have towards their adaptation in college, as well as comprehending how this process of transition from high school to college occurs. Thus, a qualitative study was conducted, using semi-structured interviews. Eight students from a public college institution in Brazil participated in this study. Analysis of Content was used in order to analyze the data, which were grouped into semantic categories. The results show that the aspects related to teaching, didacticism and relationship with professors are important to the adaptation process and these three aspects are from interdependent categories. Although the insertion in a different environment was potentially adverse, the students cope this reality as an opportunity for personal growth. Regarding to the perception of the growth condition, the results show that the participants focused in extracurricular and curricular activities offered by the University and not in the affirmative policies.
Localiza??o de insulinoma pela inje??o seletiva intra-arterial de cálcio
Espinosa, Gaudêncio;Henrici, Célio Eduardo;Abreu, Jesus Antnio de Carvalho;
Revista do Colégio Brasileiro de Cirurgi?es , 2001, DOI: 10.1590/S0100-69912001000400016
Abstract: insulinomas are rare endocrine tumors with an estimated incidence of 1(one) per million. optimal therapy for all islet tumors of the pancreas is curative surgical resection. however, previous reports have show that, in the absence of preoparative localization, insulinoma may not be found intraoperatively in about 20% of patients. with current imaging technology, including serial computed tomography (ct), magnetic resonance imaging (mri) and ultrasonography, localization of insulinomas less than 2cm remains inadequate. this case report shows that selective intraarterial calcium injection with hepatic venous sampling for insulin levels measured is a efficient technique for the localization of insulinomas.
Valores e constru o de competências coletivas no complexo têxtil: reflex es e evidências
Reginaldo de Jesus Carvalho Lima,Allan Claudius Queiroz Barbosa,Adelaide Maria Coelho Baêta,Domingos Antnio Giroletti
Revista Gest?o & Tecnologia , 2012,
Abstract:
Multiple-Clone Activation of Hypnozoites Is the Leading Cause of Relapse in Plasmodium vivax Infection
Flávia Carolina F. de Araujo, Antnio Mauro de Rezende, Cor Jesus F. Fontes, Luzia Helena Carvalho, Cristiana F. Alves de Brito
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0049871
Abstract: Background Plasmodium vivax infection is characterized by a dormant hepatic stage, the hypnozoite that is activated at varying periods of time after clearance of the primary acute blood-stage, resulting in relapse. Differentiation between treatment failure and new infections requires characterization of initial infections, relapses, and clone multiplicity in vivax malaria infections. Methodology/Principal Findings Parasite DNA obtained from primary/relapse paired blood samples of 30 patients with P. vivax infection in Brazil was analyzed using 10 molecular markers (8 microsatellites and MSP-1 blocks 2 and 10). Cloning of PCR products and genotyping was used to identify low-frequency clones of parasites. We demonstrated a high frequency of multiple-clone infections in both primary and relapse infections. Few alleles were identified per locus, but the combination of these alleles produced many haplotypes. Consequently, the majority of parasites involved in relapse showed haplotypes that were distinct from those of primary infections. Plasmodium vivax relapse was characterized by temporal variations in the predominant parasite clones. Conclusions/Significance The high rate of low frequency alleles observed in both primary and relapse infections, along with temporal variation in the predominant alleles, might be the source of reported heterologous hypnozoite activation. Our findings complicate the concept of heterologous activation, suggesting the involvement of undetermined mechanisms based on host or environmental factors in the simultaneous activation of multiple clones of hypnozoites.
Spectrophotometric Determination of Aluminium in Iron Ores Using Solid-Phase Extraction
Ferreira, Sérgio Luis Costa;Lemos, Valfredo Azevedo;Costa, Antnio Celso Spinola;Jesus, Djane Santiago de;Carvalho, Marcelo Souza de;
Journal of the Brazilian Chemical Society , 1998, DOI: 10.1590/S0103-50531998000200006
Abstract: in the present paper, a procedure for separation and determination of aluminium in iron matrices is proposed. it is based on the solid-phase extraction of the iron, in the form of thiocyanate complexes, by a polyurethane(pu) foam. the followings parameters were studied: effect of ph and of the thiocyanate concentration on the iron extraction, shaking time required for quantitative extraction, amount of pu foam necessary for complete extraction of iron, aluminium separation from other cations, influence of anions on the iron sorption by pu foam and analytical characteristics of the procedure for aluminium determination using methylthymol blue as chromogenic reagent. the results show that, in the ph range from 1.5 to 4.7, with a thiocyanate concentration of 0.80 mol l-1, by extraction using 1 g of polyurethane foam and a shaking time of 1 min, aluminium (40 mg) can be separated from large amounts of iron (10 mg), 800 mg of copper(ii), cobalt(ii), zinc(ii), mercury(ii), tin(iv), manganese(ii) and tungsten(v); 100 mg of titanium(iv) and lead(ii); and 50 mg of vanadium(v). calcium(ii), barium(ii), strontium(ii) and magnesium(ii) can not be separated by this process, but do not react with mtb under the conditions used for aluminium determination. the anions nitrate, chloride, sulfate and acetate do not affect the iron extraction. phosphate and edta must be absent. the methylthymol blue allowed the spectrophotometric determination of aluminium with molar absorptivity of 1.32 x 104 l mol-1 cm-1 (528 nm), calibration sensitivity of 0.491 ml g-1, detection limit of 5 ng ml-1 and dynamic interval of application of 15 ng ml-1 to 1.00 mg ml-1 and variation coefficient of 0.73%. the proposed procedure was applied for aluminium determination in iron ores and metal-base alloy standards. the obtained results did not show significant difference from the certified values.
Substrato, temperatura de germina??o e desenvolvimento pós-seminal de sementes de Dalbergia nigra
Andrade, Antnio Carlos Silva de;Pereira, Tania Sampaio;Fernandes, Marina de Jesus;Cruz, Ana Paula Martins;Carvalho, Amanda Silva da Rosa;
Pesquisa Agropecuária Brasileira , 2006, DOI: 10.1590/S0100-204X2006000300020
Abstract: the objective of this work was to define the germination substrate of dalbergia nigra (vell.) fr. all. ex benth (jacarandá-da-bahia), to evaluate the most appropriate temperature for its seeds germination, and to study its post-seminal morphology, showing normal and abnormal seedlings patterns. seeds were sowed on filter paper, towel paper and vermiculite, using the constant temperatures of 20, 25, 30 and 35°c as well as alternate temperatures of 20-30°c and 20-35°c. the statistical design was completely randomized (6x3) with 50 seeds sowed in four replications in which the following parameters were analyzed: normal germination (normal seedlings) percentage and speed emergence index. the best results were obtained for temperatures of 25°c and 20-30°c in vermiculite and towel paper substrates. normal seedlings were classified as faneroepigeal germination type.
Antiplatelet activity of Croton celditifolius
Neiva, Teresinha de Jesus Carvalho;Moraes, Ana Carolina Rabello de;Buchele, Carlos;Pizzolatti, Moacir Geraldo;D'Amico, Elbio Antnio;Fries, Diana Marli;Rocha, Tania Rubia Flores da;
Revista Brasileira de Ciências Farmacêuticas , 2008, DOI: 10.1590/S1516-93322008000100014
Abstract: croton celtidifolius baill is a tree found in the atlantic forest south of brazil, mainly in santa catarina. the bark and leaf infusions of this medicinal plant have been popularly used for the treatment of inflammatory diseases. the anti-aggregant activity of c. celtidifolius crude extract (ce) and the column chromatography (cc) isolated compounds flavonoids, catechin and gallocatechin were evaluated in human blood platelets. the platelet-rich plasma (prp) was incubated with different concentrations of flavonóides (50 - 200 μg/ml) to be tested before platelet aggregation was induced by the agonists adenosine 5'diphosphate (adp) and collagen. at 200 μg/ml the ce, catechin and gallocatechin markedly inhibited platelet aggregation with the aggregant agents. using atp production as an index of platelet secretory capacity, we observed a decreased production of atp in platelets treated with flavonoids when stimulated by collagen. on the other hand, the flavonoids did not promote inhibitory effect on prothrombin time (pt), thromboplastin time (aptt) and thrombin time (tt). in conclusion, these observations suggest that c. celtidifolius is likely to exert an inhibitory action on platelets in vitro by suppressing secretion and platelet aggregation.
Morphometric analysis of the effectiveness of different concentrations of sodium hypochlorite associated with rotary instrumentation for root canal cleaning
Baratto-Filho, Flares;Carvalho Jr., Jacy Ribeiro de;Fariniuk, Luiz Fernando;Sousa-Neto, Manoel D.;Pécora, Jesus Djalma;Cruz-Filho, Antnio Miranda da;
Brazilian Dental Journal , 2004, DOI: 10.1590/S0103-64402004000100007
Abstract: this study evaluated the cleaning capacity of profile .04 instruments with different concentrations of naocl solutions on flattened root canals. twenty central mandibular incisors were divided into 4 groups: group i: 0.5% naocl; group ii: 1% naocl; group iii: 5% naocl; group iv: distilled and deionized water. after chemomechanical preparation, the teeth were submitted to histological preparation and morphometric analysis. morphometric analysis showed that the 5% naocl was significantly more efficient in cleaning the root canal than 0.5% naocl and distilled water, which had the lowest levels of cleaning of the root canals (p<0.01).
Influence of chisel width on shear bond strength of composite to enamel
Oliveira, Antnio Carlos Castellan et al.
Revista Odonto Ciência , 2009,
Abstract: Objetivo: Avaliar a influência de diferentes larguras de cinzel sobre a resistência de uni o ao cisalhamento na interface esmalte dental/resina composta. Metodologia: As coroas de 60 dentes incisivos bovinos foram incluídas em resina acrílica e as superfícies vestibulares de esmalte foram planificadas e condicionadas com ácido fosfórico a 35 %. O sistema adesivo Single Bond (3M/ESPE) e de resina composta Z-250 (3M/ESPE) foram utilizados para fabricar restaura es cilíndricas de resina composta perpendiculares à superfície plana do esmalte condicionado. Para o teste de cisalhamento, os espécimes foram submetidos ao ensaio mecanico com cinzéis de 0,5 mm, 1,0 mm, 2,0 mm ou 3,0 mm de largura da parte ativa romba, em uma máquina de ensaio universal à velocidade de 0,5 mm/min. Os dados obtidos foram analisados por análise de variancia e teste de Duncan ao nível de significancia de 5 %. Resultados: As médias de resistência de uni o ao cisalhamento dos grupos testados foram: 0,5 mm – 19,66 MPa; 1,0 mm – 18,78 MPa; 2,0 mm – 16,77 MPa; 3,0 mm –16,06 MPa. Houve diferen a estatisticamente significativa entre os grupos de 0,5 e 3,0 mm (P=0,045), com uma rela o inversa entre resistência de uni o ao cisalhamento e largura do cinzel. Conclus o: Os resultados sugerem que a resistência de uni o ao cisalhamento sofre influência da largura do cinzel utilizado no ensaio.
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