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Search Results: 1 - 10 of 183423 matches for " Thiago Dornelas de Oliveira "
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Evaluation of Cytotoxicity of Gossypium barbadense L. Extract in Bone Cord Cells through the Micronucleus Test  [PDF]
Thiago Dornelas de Oliveira, Joice Meire Rodrigues, Thiago Sande Miguel, Nayrton Kalys Cruz dos Anjos, Juscélio Clemente de Abreu, Lamara Laguardia Valente Rocha, Raquel Xavier Ligeiro Dias, Daniel Almeida da Costa
Journal of Biosciences and Medicines (JBM) , 2017, DOI: 10.4236/jbm.2017.57008
Abstract: The cotton plant is a plant belonging to the family Malvaceae and its leaves are often used in folk medicine. The present study aimed to evaluate the mutagenic or antimutagenic activity of the ethanolic extract of Gossypium barbadense L. (EEG) and to analyze its capacity to prevent or repair mutagenic lesions caused by cyclophosphamide (CP). For the Micronucleus test, Swiss mice were divided into 5 groups: negative control; Positive control: treated with 50 mg/kg cyclophosphamide (CP), group receiving EEG 500 mg/kg for 7 days; Group receiving EEG 500 mg/kg for 7 days associated with CP24h before euthanasia; Group who received CP and EEG 500 mg/kg for 7 days. After the treatment period, the animals were euthanized, the bone marrow removed and the blood smear prepared. From this analysis, it was observed that the EEG caused a significant increase in the number of micronucleated erythrocytes, indicating mutagenic activity of the extract. In addition, it was verified that the extract did not present the capacity to prevent, but it presented the capacity of repair of the chromosomal damages caused by CP.
Effects of Gaseous Drinks in Wistar Rats Esophagus  [PDF]
Thiago Dornelas de Oliveira, Marcelli Eliotério Gaspar, Larissa Menezes Viana Braga, Joice Meire Rodrigues, Rebeca Nogueira Falc?o Santos, Suelen Gaudino Moura, Nayara Barbosa Bicalho, Lamara Laguardia Valente Rocha, Daniel Almeida da Costa, Marcus Vinicius de Mello Pinto
Journal of Biosciences and Medicines (JBM) , 2017, DOI: 10.4236/jbm.2017.55004
Abstract: The consumption of beverages and processed foods, mainly soft drinks, has been incorporated into the usual diet of children, adolescents and adults frequently in recent years. The present study aimed to study the effects of carbonated drinks on Wistar rats, based on the macroscopic and histological morphology of the esophagus. Fifteen Wistar rats were divided into three groups: control group; group fed with ration and cola-type refrigerant ad libitum and group fed with ration and gas industrialized water ad libitum, for a trial period of 90 days. For histopathology and morphology, the esophagus was removed, prepared in slides and stained with hematoxylineosin. Images of the sections were captured for analysis and classification of the inflammatory infiltrate. For morphometry, ten grid fields of 100 points were evaluated in the 40x eyepiece, totaling 3000 points per animal. The results demonstrate that the refrigerant treatment induced the following structural changes in the rats: significant reduction of weight in relation to the control group; inflammatory infiltrate predominantly diffuse mild to moderate and tissue edema. The rats treated with carbonated water had similar results to the control, besides signs of healing and tissue repair.
Sobrecarga de ferro transfusional em portadores de anemia falciforme: compara??o entre ressonancia magnética e ferritina sérica
Bourbon Filho, Lécio dos Anjos;Ferr?o, Thiago de Oliveira;Fran?a, Alex Vianey Callado;Rocha, Ricardo Dantas;Dantas, Lorena Dias;Carvalho, Luciana Franco do Prado;Moreira, Marcella Dornelas de Abreu Batalha;Cipolotti, Rosana;
Radiologia Brasileira , 2011, DOI: 10.1590/S0100-39842011000300006
Abstract: objective: to identify predictive variables of iron overload in patients with sickle cell anemia, correlating biochemical and imaging markers. materials and methods: the authors developed a cross-sectional study involving 32 patients with sickle cell anemia who were evaluated for ferritin and iron serum levels and submitted to liver magnetic resonance imaging with one spin-echo and five gradient-echo sequences. the signal intensity was obtained at each sequence, corresponding to the arithmetical mean of the measurements on regions of interest in the liver and paraspinal muscles to obtain the liver/muscle signal intensity ratio (sir). based on such sir, the liver iron concentration (lic) was estimated by means of the following formula: e[5.808 - (0.877 × t2*) - (1.518 × iw)], where t2* is the sir on the sequence with echo time = 13 ms and iw is the sir on the intermediate-weighted sequence. patients were grouped according to their blood transfusion regimen (regular monthly versus sporadic transfusions). results: the comparison between the transfusion groups was based on clinical-laboratory variables, with significant differences in sir, lic and serum ferritin levels: the group with regular transfusions demonstrated greater hepatic iron overload. conclusion: magnetic resonance imaging is an efficient tool for evaluating liver iron overload in patients with sickle cell anemia.
Frequência de publica??o de trabalhos científicos apresentados no 9o Congresso Brasileiro de Dor
Oliveira, Thiago Robis de;
Revista Dor , 2012, DOI: 10.1590/S1806-00132012000200005
Abstract: background and objectives: scientific meetings are critical for discussion and spread of knowledge arising from research and clinical practice analyses. this study aimed at establishing the publication rate of papers approved as free papers and posters during the 9th brazilian congress on pain and at evaluating their characteristics. method: retrospective cohort study using descriptive statistics, which has evaluated the abstracts presented during the above-mentioned congress. after querying medline/pubmed, scielo, lilacs and academic google databases, publication rate and characteristics of published papers were examined: journal name, publication year, language, institution of origin, paper category, authors and co-authors. results: from 348 abstracts, 31 (8.9%) were published and most came from brazilian institutions (90.32%). papers were published in 21 journals being most common the "original article" category (83.87%). mean time between the holding of the congress and papers publication was 6.7 ± 3 months, with median of 6.9 months. conclusion: the rate of published papers (8.9%) identified in this study is much lower than the international mean, indicating that participants of scientific meetings should be encouraged to publish their papers.
Ethics in Science: Pleasure and obligation?
Kleber Thiago de Oliveira
Orbital : the Electronic Journal of Chemistry , 2012,
Abstract:
O Ofício do Filósofo Estóico, o duplo registro do discurso da Stoa, de Rachel Gazolla
Thiago de Oliveira Barbalho
Princípios : Revista de Filosofia , 2004,
Abstract: Resenha do Livro "O ofício do filósofo estóico", de Rachel Gazolla.
Monogamy Inequality and Residual Entanglement of Three Qubits under Decoherence
Thiago R. de Oliveira
Physics , 2009, DOI: 10.1103/PhysRevA.80.022331
Abstract: Exploring an analytical expression for the convex roof of the pure state squared concurrence for rank 2 mixed states the entanglement of a system of three particles under decoherence is studied, using the monogamy inequality for mixed states and the residual entanglement obtained from it. The monogamy inequality is investigated both for the concurrence and the negativity in the case of local independent phase damping channel acting on generalized GHZ states of three particles and the local independent amplitude damping channel acting on generalized W state of three particles. It is shown that the bipartite entanglement between one qubit and the rest has a qualitative similar behavior to the entanglement between individual qubits, and that the residual entanglement in terms of the negativity cannot be a good entanglement measure for mixed states, since it can increase under local decoherence.
Attention Changes and Victimization in a Sample of Adolescents Victims of Domestic Violence  [PDF]
Paula Approbato de Oliveira, Thiago Fernando da Silva, Sandra Scivoletto
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.43026
Abstract: Objective: To report attention changes in a sample of adolescents victims of domestic violence and discuss how this change may be related to an addictive and complex cycle of victimization and abuse. Methods: 78 adolescents went through psychiatric and neuropsychological evaluation. The Kiddie-Sads-Present and Lifetime Version and the Brazilian version of the Childhood Trauma Questionaire (CTQ) were applied. The neuropsychological assessment was conducted by trained professionals using the Wechsler Children’s Global Assessment Scale, 3rd edition-WlSC III. The sample was divided into 3 groups according to the intensity of the reported maltreatment-obtained by the CTQ score (comparison group, moderate degree of abuse and severe maltreatment). Results: The group that showed moderate maltreatment showed better performance in an attention task compared to the comparison group. At the severe maltreatment group, this difference was not observed. Conclusions: Children and adolescents who are victims of maltreatment are more alert to environmental details that surround them as a form of adaptation to defend themselves against potential threats. However, they could react precipitously with inappropriate behavior in some contexts. This can lead to a favorable environment for new and repeated situations of violence, abuse and a perpetuation of this victimization.
Encontros possíveis: experiências com jogos teatrais no ensino de ciências Possible encounters: experiences with theater games in science education
Thiago Ranniery Moreira de Oliveira
Ciência & Educa??o (Bauru) , 2012, DOI: 10.1590/s1516-73132012000300005
Abstract: O que pode acontecer entre o Teatro e o Ensino de Ciências? Quais as potencialidades da composi o Ensino de Ciências com jogos teatrais? Que agenciamentos podem surgir desse encontro? Ao seguir as trilhas da filosofia da diferen a em educa o, inspirada em Gilles Deleuze, investiga-se, a partir de uma cartografia, a experiência da oficina de teatro Ciência inCena. Nela, alunos-atores escolheram o conteúdo de peixes a ser trabalhado a partir de jogos teatrais. O processo de montagem de Pedro e o mar ou como os peixes h o de voar indica possibilidades de se pensar outras narrativas para os sujeitos e objetos das aulas de ciências e as rela es que os comportam. What can happen between Theater and Science Education? What are the potentialities for science teaching and theater games? Which outcomes may emerge from this meeting? By following in the tracks of the philosophy of difference in education, inspired by Gilles Deleuze, the experience of theater workshop Ciência inCena is investigated. In it, student-actors chose the contents to work with in theater games about fish. The process of making the theater play Pedro e o mar ou como os peixes h o de voar indicates possibilities of thinking about other narratives in order to consider the subjects and objects of science classes and the relationships which constitute them.
Anatomical Indicators of Dominance between the Coronary Arteries of Dogs Indicadores Anatómicos de la Dominancia en las Arterias Coronarias de Perros
Carla Lívia Santos de Oliveira,Gustavo Serra David,Michelly de Oliveira Carvalho,Dornelas
International Journal of Morphology , 2011,
Abstract: In humans, the right coronary artery is dominant. However, we did not find any citations in the literature concerning anatomical indicators of dominance among dogs. We used 30 hearts from mongrels of both sexes, fixed in 10% formalin. The branches of the coronary arteries were dissected with special attention to the levels that were considered to be reference points. In 96.7%, the circumflex branch of the left coronary artery reached or went beyond the crux cordis. The subsinuosus interventricular artery, ended before reaching the apex in 21 cases, at the apex in five cases and after the apex in four cases. The paraconal interventricular artery, ended before reaching the apex in two cases, at the apex in 11 cases and after the apex in 17 cases. The region of the heart apex was irrigated by branches of the left coronary artery, through the paraconal interventricular branch or through both of the interventricular branches. The mean length and number of ventricular branches of the left coronary artery were greater than those of the right coronary artery. The subsinuosus interventricular branch is a branch of the circumflex branch of the left coronary artery. In the hearts of dogs, the left coronary artery is dominant. The dominance pattern in dogs is different from the dominance pattern in human that is mentioned in the specialized literature. En los corazones humanos la dominancia coronaria es derecha. Sin embargo, no encontramos referencias en la literatura sobre los indicadores de esta dominancia en perros. Utilizamos 30 corazones de perros de ambos sexos y raza mixta, fijados en formaldeído al 10%. Las ramas de las arterias coronarias fueron disecadas con especial atención a los niveles considerados como referencias. En 96,7% de los corazones, la rama circunfleja de la arteria coronaria izquierda excedió o llegó a la crux cordis. La arteria interventricular subsinuosa, terminó antes de llegar al ápice en 21 casos, en el ápice en 5 casos y después del ápice en 4 casos. La arteria interventricular paraconal, terminó antes de llegar al ápice en 2 casos, en el ápice en 11 casos y después del ápice en 17 casos. La región del ápice del corazón estaba irrigada por ramas de la arteria coronaria izquierda a través de la rama interventricular paraconal o a través de los dos ramas interventriculares. La longitud media y el número de ramas ventriculares de la arteria coronaria izquierda son más grandes que las ramas de la arteria coronaria derecha. La rama interventricular subsinuosa es una rama de la rama circunfleja de la arteria coronaria izquierda. En los cora
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