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Search Results: 1 - 10 of 354650 matches for " Inês Bernardo OLIVEIRA "
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Open-ended Tasks in the Promotion of Classroom Communication in Mathematics
Floriano VISEU,Inês Bernardo OLIVEIRA
International Electronic Journal of Elementary Education , 2012,
Abstract: Mathematics programmes in basic education are currently undergoing reform in Portugal. This paper sets out to see how teachers are putting the new guidelines for the teaching of mathematics intopractice, with particular emphasis on maths communication in the classroom. To achieve this, an experiment in teaching the topic 'Sequences and Regularities' with open-ended tasks, using a qualitative and interpretative approach, is reported. Data were collected during two class observations, from two interviews and by analysing the activities of the students. An exploratory task was chosen in the first lesson and a investigative one in the second. One month separated the two lessons, and during this time the teacher read and discussed texts on mathematics communication. Observation of the first lesson showed that the communication in the classroom was mostly focused on the teacher, which provided little student-student and student-class interaction. In the second observed lesson, the teacher changed the attention she paid to what each student said and did, encouraging the students to ask each other and encouraged student-class and the student-student communication.
Controle da dor por bloqueio peridural e incidência de disritmias cardíacas no pós-operatório de procedimentos cirúrgicos torácicos e abdominais altos: estudo comparativo
Oliveira, Rohnelt Machado de;Tenório, Sérgio Bernardo;Tanaka, Pedro Paulo;Precoma, Dalton;
Revista Brasileira de Anestesiologia , 2012, DOI: 10.1590/S0034-70942012000100003
Abstract: background and objectives: upper abdomen and thorax surgeries cause intense pain. some of postoperative pain main complications are cardiocirculatory complications. the objective of this study was to test the hypothesis that postoperative analgesia with employment of local anesthetics plus spinal opioids may reduce the incidence of cardiovascular complications in postoperative period of patients in these conditions, comparing with classical methods of postoperative analgesia, opioids and nsaids, administered upon patient's demand. method: eighty adult patients, asa i and ii, without ecg alterations, were allocated into two groups of 40: group a, patients under general anesthesia with propofol, cisatracurium and isoflurane, associated with epidural anesthesia with catheter and control of postoperative analgesia with bupivacaine and epidural morphine; and group b, patients under general anesthesia with the same drugs and doses of a, plus postoperative analgesia carried out with nsaids and intravenous morphine at the end of surgery and in regular intervals. in both groups holter was applied for 24 hours. pain evaluation was carried out through visual analog scale. results: in pain evaluation, an evident predominance of 0 score (p < 0.001) was observed in group a and there was also reduction of blood pressure levels in postoperative period in a more accentuated way. ventricular and supraventricular dysrhythmias were five times more frequent in group b (p = 0.00001), in which a tendency to a higher frequency of ventricular extrasystoles in age > 50 years (22.2% versus 0.0%. p = 0.26) was also detected. no significative difference of heart rate among groups (p > 0.05) was observed. conclusions: the best quality of analgesia in postoperative period, carried out in group a, reduced the incidence of cardiovascular complications
Características físico-mecanicas do couro de caprinos mesti?os Boer e Anglo Nubianos
Villarroel, Arturo Bernardo Selaive;Costa, Roberto Germano;Oliveira, S?nia Maria Pinheiro;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000900024
Abstract: the physical-mechanic industry characteristics of 22 crossed goat leathers from native does mated with anglo nubian (ag) and boer (bo) bucks were studied to evaluate the leather quality by analysis of tension and tear resistance. animals were slaughtered at average of 260 days of age and 22.0 kg of live body weigth. after skinning, the pelts were weighed, conserved in brine and salted and classified by quality before the chromium-tanned. to evaluate the tension and tear resistance assays, from the semi-finished leathers, six samples were taken in two directions from palette, hind and ventral regions. a split plot experimental design was used, where the two genetic groups were represented by the plots and a 2 x 3 factorial (two positions and three regions) by the split plots. means were compared by tukey test. no difference among groups in tension and tear resistance of leather assays were observed. however, there was a significant difference among samples from the palette, hind and ventral region in all characteristics studied, being thickness, strength and elongation valious higher in palette region. it was concluded that goat leather characteristics are similar for both genetic group and the quality is superior than the industry quality reference for a good product and the use of boer exotic breed on crossing with native does to improve the meat production do not affect the leather quality of the animals.
Características físico-mecanicas do couro de ovinos mesti?os Santa Inês e Texel
Villarroel, Arturo Bernardo Selaive;Costa, Roberto Germano;Oliveira, S?nia Maria Pinheiro;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000900025
Abstract: this work aimed to evaluate the physical-mechanic characteristics of crossed sheep leathers from hairy tropical crioula ewes mated with texel wooly breed (te) and santa inês (si) hair tropical breed rams. twenty two skin were evaluated from male sheep slaughtered at average of 240 days of age and 21.9 ± 4.4 and 20.9 ± 3.4 body live weight, respectively for te and si. after skinning, pelts were weighed, conserved in brine and salted and classified by quality before the chromium-tanned. from the leather obtained in this stage, called wet blue, samples were taken from palette, hind and ventral regions. from each region studied, three samples were taken in two directions for physical-mechanical analysis of tension and tear resistance. a split plot experimental design was used, where the two genetic groups were represented by the plots and a 2 x 3 factorial (two positions and three regions) by the split plots. results showed that the si leathers group had better resistance to tensile strength and distention assays than te group and, in both genetic group, there were not significant differences among the different regions studied on leather. it was concluded that leathers from the crossbreding of texel sheep wooly ram and crioula hairy ewes showed smaller industry quality than hair tropical santa inês breed.
Action of pentoxifylline on experimental cutaneous leishmaniasis due to Leishmania (Leishmania) amazonensis
Oliveira Thiago de Sá,Capp Neto Mário,Martins Bernardo José Alves,Rodrigues Helbert Abe
Memórias do Instituto Oswaldo Cruz , 2000,
Abstract: In the animal model of leishmaniasis caused by Leishmania (Leishmania) amazonensis there is a complex mechanism of the host-parasite interaction. The present study was performed to interfere with the inflammatory reaction to the parasites, through immune modulation. Female C5BL/6 isogenic mice were used, some of which were inoculated on the right ear and others on the right footpad with 3.10(6) stationary phase promastigotes of the MHOM/BR/PH8 strain of L. (L.) amazonensis, and were allocated in three groups: the first received pentoxifylline 8mg/kg every 12 h, since the first day; the second one received the same dose since the 40th day of infection and a control group that did not receive any treatment. All the ears excised were analyzed to determine the variation in weight between both ears and for histopathological analyses. A quantification of the parasites was done using the limiting dilution assay. A significant reduction of the number of parasites, was observed among the animals treated which had an accordingly significant reduction on the weight of the ears. Pentoxifylline reduced the macrophages propensity to vacuolation and induced a more effective destruction of the parasites by these cells. Moreover, the group that began the treatment later did not show the same effectiveness.
Susceptibility to Entamoeba histolytica intestinal infection is related to reduction in natural killer T-lymphocytes in C57BL/6 mice
Fabrício M.S. Oliveira,Bernardo C. Horta,Luana O. Prata,Andrezza F. Santiago
Infectious Disease Reports , 2012, DOI: 10.4081/idr.2012.e27
Abstract: Entamoeba histolytica is a protozoan that causes amoebiasis. Recent studies demonstrated that natural killer T lymphocytes (NKT) are critical for preventing the development of amoebic liver abscess. In spite of that, there are only a handful of studies in the area. Herein, we explored the role of NKT cells in E. histolytica infection using C57BL/6 wild-type and CD1-/- mice. Animals were inoculated with E. histolytica and sacrificed 48 hours later to collect caecum samples that were used for quantitative analyses of lesions, trophozoites, NK1.1+ T lymphocytes and expression of the mucus protein MUC-2 by immunohistochemistry technique. Quantitative analyses confirmed that the frequency of NK1.1+ T cells was significantly lower in samples from C57BL/6 CD1-/- mice as compared to their wild type (WT) counterparts. The extension of necrotic mucosa was larger and the number of trophozoites higher in Entamoeba (Eh)-infected CD1-/- mice when compared with Eh-infected WT mice. In mice from both groups, noninfected (CTRL) and Eh-infected CD1-/-, there was a reduction in the thickness of the caecal mucosa and in the MUC-2-stained area in comparison with CTRL- and Eh-WT mice. Our results showed that NKT lymphocytes contribute to resistance against Entamoeba histolytica infection and to the control of inflammation in the colitis induced by infection. The presence of a normal epithelial layer containing appropriate levels of mucus had also a protective role against infection.
Ruminal variables in steers fed with Tifton 85 (Cynodon Spp) hay with different particle sizes / Variáveis ruminais em novilhos alimentados com feno de Tifton 85 com diferentes tamanhos de partículas
Elzania Sales Pereira,Ivone Yurika Mizubuti,Arturo Bernardo Selaive Villarroel,S?nia Maria Pinheiro de Oliveira
Semina : Ciências Agrárias , 2009,
Abstract: The ammonia nitrogen (N-NH3) concentration and the pH were determined with the objective of evaluating the effect of different particle sizes (5, 7, 10mm and whole) of Tifton 85 hay in the diet of Holstein steers, with average live weight of 300kg and age of 20 months. A completely randomized design, with four replicates, in a split-plot arrangement was used. The plots were the experimental treatments (5, 7, 10mm and whole hay) and the subplots were the times of collection (0, 2, 4, 6, 8h). The use of diets including hay with particle sizes of 5mm and whole, did not affect (P>0,05) the ruminal pH; average values were 6.14 and 6.61, respectively. A linear reduction in the ruminal pH was verified in the steers fed on diets constituted by 10mm particles. For the diets including Tifton hay with particle size of 7mm, it was observed a quadratic effect, where the minimum pH (5.39) was observed 8:00 h after the feed was furnished. Concentrations of N-NH3 were affected by collection time in a quadratic way. Maximum concentrations of N-NH3, 15.55, 15.83, 18.32, 12.0 mg/100 mL, were observed at 4:28, 3:58, 2:99 and 2:80h after feeding, for the diets including Tifton 85 hay with 5, 7, 10mm and whole particle sizes, respectively. It was concluded that all diets allowed normal nycterohemeral patterns of fermentation. As concentra es de nitrogênio amoniacal (N-NH3) e pH foram determinadas objetivando avaliar o efeito de diferentes tamanhos de partículas de feno de Tifton 85 (5, 7, 10mm e inteiro) na dieta de novilhos holandeses, castrados, com peso vivo médio de 300kg e idade média de 20 meses. As determina es das concentra es de am nia ruminal (N-NH3) e o pH foram analisadas em delineamento inteiramente casualizado, em esquema de parcela subdivididas, tendo nas parcelas os tratamentos experimentais (5, 7, 10mm e feno inteiro) e nas sub-parcelas os tempos de coleta (0, 2, 4, 6, 8h), com quatro repeti es. A utiliza o de dietas constituídas com tamanhos de 5mm e partícula inteira n o afetaram o pH ruminal (P>0,05), registrando-se valores médios de pH 6,14 e 6,61, respectivamente. Verificou-se redu o linear no pH ruminal dos novilhos alimentados com a dieta constituída com partícula de 10mm e constatou-se efeito quadrático para a dieta constituída com tamanho de partícula de feno de Tifton 7mm, apresentando pH mínimo de 5,39 a 8:00 horas após o fornecimento da alimenta o. As concentra es de N-NH3 foram influenciadas quadraticamente pelos tempos de coleta, registrando concentra es máximas, de 15,55; 15,83; 18,32; 12,00mg/100mL de N-NH3 às 4:28; 3:58; 2:99 e 2:80
Growth curve of lambs from three systems of production in Northeastern Brazil Curva de crescimento de cordeiros oriundos de três sistemas de produ o na Regi o Nordeste do Brasil
Marcílio Costa Teixeira,Arturo Bernardo Villarroel,Elzania Sales Pereira,S?nia Maria Pinheiro de Oliveira
Semina : Ciências Agrárias , 2012,
Abstract: The objective was to analyze nonlinear models to describe growth of lambs in three production systems. The models used were: Brody, Von Bertalanffy, Gompertz and Richards. In a 1 production system was used lambs in “creep feeding”, weaned at 60 days old and kept on pasture until they reach average 20 kg, when they were confined, slaughtered between 28 and 30 kg. In the 2 production system, lambs weaned at 90 days and kept on cultivated pasture and slaughtered between 28 and 30 kg, were used. In 3 Production System, lambs weaned at 90 days old and kept in an area of native pasture supplemented with elephant grass and leucena, in the critical period of the year and slaughtered at 28 to 30 kg were used. 17 weights of 30 animals, 10 animals for each system, from birth to 450 days, were used. Based on the study of the growth curves that are best adapted to predict the results of growth were those of Richards and Brody models, however none of the models simulated curve showed satisfactory results for the three production systems. O objetivo foi analisar modelos n o lineares para descrever o crescimento de cordeiros criados em três Sistemas de produ o. Os modelos utilizados forram: Brody, Von Bertalanffy, Richards e Gompertz. No Sistema de produ o 1 utilizaram-se cordeiros alimentados em “creep-feeding”, desmamados aos 60 dias de idade e mantidos em pastagem cultivada até atingirem media de 20 kg, quando foram confinados, e abatidos entre 28 e 30 kg. No Sistema de produ o 2 utilizaram-se cordeiros desmamados aos 90 dias e mantidos em pastagem cultivada, sendo abatidos entre 28 e 30 kg. No Sistema de produ o 3 utilizaram-se cordeiros desmamados com 90 dias de idade e mantidos em área de pastagem nativa suplementados com feno de capim elefante e de leucena no período crítico do ano e abatidos aos 28 e 30 kg. Foram utilizadas 17 pesagens de 30 animais, sendo 10 animais para cada Sistema, do nascimento aos 450 dias. Com base no estudo das curvas de crescimento, as que melhor se adaptaram para predi o dos resultados de crescimento foram as de Richards e Brody, entretanto nenhum dos modelos de curva simulados apresentou resultados satisfatórios para o Sistema de produ o 3.
Evolu??o temporal do tabagismo em estudantes de medicina, 1986, 1991, 1996
Menezes,Ana; Palma,Eduardo; Holthausen,Ricardo; Oliveira,Ricardo; Oliveira,Pablo S; Devens,Eduardo; Steinhaus,Luciane; Horta,Bernardo; Victora,Cesar G;
Revista de Saúde Pública , 2001, DOI: 10.1590/S0034-89102001000200010
Abstract: objective: to evaluate trends in smoking habits among medical students in the last ten years. methods: in 1996, a cross-sectional survey of smoking habits was carried out among students in the first to the fifth year of medical school. four hundred and nine students answered the questionnaire. a regular smoker was defined as someone who smokes one or more cigarettes a day at least for one month; former smokers were the ones who used to smoke in the past but not at the moment. similar researchs were conducted in 1986 and 1991. results/conclusions: smoking prevalence was 11% compared with 14% in 1991 and 21% in 1986. although there was a significant reduction of smoking in the last three years, the actual decrease from 1991 to 1996 was less than that observed from 1986 to 1991. in 1961, the prevalence of smoking increased in the last years of medical school. there were no significant differences regarding gender. most of the students were in favor of not allowing smoking in both the school areas and hospital wards. they also mentioned in their questionnaire that smoking was poorly approached during medical school.
Hemodilui o normovolêmica aguda em crian as submetidas a artrodese de coluna vertebral pela via posterior
Oliveira Gizelda S de,Tenório Sérgio Bernardo,Cumino Débora O,Gomes Daniela B Garcia
Revista Brasileira de Anestesiologia , 2004,
Abstract: JUSTIFICATIVA E OBJETIVOS: A hemodilui o normovolêmica aguda (HNA) é um método de transfus o autóloga simples e de baixo custo. O objetivo deste estudo foi verificar se a HNA pode reduzir a necessidade de sangue homólogo em crian as submetidas à artrodese da coluna vertebral pela via posterior e avaliar as complica es decorrentes da hemodilui o nesse tipo de paciente. MéTODO: Participaram do estudo 25 crian as, estado físico ASA I e II, submetidas a artrodese de coluna pela via posterior, e que receberam HNA (grupo H). Foram registrados os valores do hematócrito no início e fim da cirurgia, na alta da terapia intensiva e do hospital, o percentual de crian as que recebeu transfus o homóloga durante e após a cirurgia e as complica es ocorridas no intra e no pós-operatório. Os dados do grupo H foram comparados com outro grupo de crian as submetidas ao mesmo tipo de cirurgia, mesma técnica anestésica, porém sem HNA (grupo S). RESULTADOS: As medianas de idade e peso dos dois grupos H e S foram respectivamente 13 e 12 anos e 41,5 e 34 kg. Foram retirados 523 ml de sangue do grupo H, no início da cirurgia, equivalente a 17,1% da volemia, e reinfundida simultaneamente solu o de Ringer com lactato, reduzindo o hematócrito para 28,8% ± 3.72%. No final da cirurgia, após a reinfus o do sangue autólogo, hematócrito atingiu o valor médio de 27% no grupo H e 30,4% no grupo S (p = 0,01). Na alta da unidade de terapia intensiva e na alta do hospital, as diferen as entre os hematócritos n o eram estatisticamente significativas. Transfus o de sangue homólogo foi utilizada em 28% das crian as do grupo H e 79% do grupo S (p = 0,001). Hipotens o arterial ocorreu em 28% dos pacientes do grupo H e 37,5% do grupo S (p = 0,9). No grupo S, 4 pacientes tiveram complica es infecciosas importantes no pós-operatório. A dura o da interna o hospitalar nos grupos H e S foram, respectivamente, 7,56 ± 3,203 dias e 9,75 ± 4,245 dias (p = 0,009). O grupo H recebeu 3.948 ± 1.334 ml de Ringer com lactado e o grupo controle 2.234 ± 953 ml (p < 0,0001). CONCLUS ES: A hemodilui o normovolêmica aguda é um método seguro e capaz de reduzir a necessidade por sangue homólogo em crian as submetidas à artrodese de coluna. N o houve complica es decorrentes da anemia.
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