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Search Results: 1 - 10 of 67828 matches for " Ana Carolina Oliveira "
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Servi o Social e desafios da ética em pesquisa: um estudo bibliográfico Social Work and Ethical Challenges in Research: a bibliographic study
Ana Carolina Oliveira,Cristiano Guedes
Revista Katálysis , 2013,
Abstract: A ética em pesquisa tem sido um tema de importancia crescente no campo disciplinar do Servi o Social em virtude do aumento de pesquisas envolvendo seres humanos e da necessidade de proteger os direitos dos participantes. Este artigo tem o objetivo de apresentar um perfil das pessoas pesquisadas e os cuidados éticos adotados em pesquisas envolvendo seres humanos publicadas na Revista Katálysis de 1997 a 2011. O estudo foi baseado em pesquisa bibliográfica. Os resultados mostraram a existência de 53 artigos originados de pesquisas envolvendo seres humanos. O levantamento revelou o seguinte perfil dos participantes de pesquisa, segundo faixa etária: 73% de adultos; 21% de crian as e adolescentes; e 6% de idosos. A partir de 2007, observou-se que 53% dos artigos publicados passaram a descrever os cuidados éticos adotados na pesquisa, como a preserva o do anonimato e a devolu o dos resultados aos participantes. Ethics in research has been an issue of growing importance in the disciplinary field of Social Work due to the increased number of studies involving human beings and the need to protect the rights of participants. The purpose of this article is to present a profile of the people studied and the ethical care adopted in studies involving humans published in the Revista Katálysis from 1997 to 2011. This study is based on bibliographic research. The survey found 53 articles based on studies involving humans with the following profile of the research participants according to age range: 73% involved adults; 21% children and adolescents; and 6% senior citizens. Since 2007, 53% of the articles published describe the ethical care adopted in the research, such as the preservation of anonymity and the return of the results to the participants.
Comparison of Different Washing and Disinfection Protocols Used by Food Services in Southern Brazil for Lettuce (Lactuca sativa)  [PDF]
Ana Beatriz Almeida de Oliveira, Ana Carolina Ritter, Eduardo Cesar Tondo, Marisa Itapema Cardoso
Food and Nutrition Sciences (FNS) , 2012, DOI: 10.4236/fns.2012.31006
Abstract: Different protocols have been used for washing and disinfecting leafy vegetables in Brazilian food services, however its effect on microbial reduction was barely studied. The aim of this study was to evaluate the effectiveness of lettuce washing and disinfecting protocols used by food services. The treatments evaluated were: washing in potable tap water (T1); washing and dipping in potable tap water (T2); washing with potable tap water and dipping in a solution of sodium hypochlorite (200 ppm of free chlorine) for 15 min (T3); and 30 min (T4); washing with potable tap water and dipping in 2% vinegar solution (T5); and 20% vinegar solution (T6). After the treatments, the samples were microbiologically evaluated to measure bacterial reductions. The microbial counts showed that the mean total mesophile reductions were: 0.64 log for T1, 0.75 log for T2, 2.06 log for T3, 2.46 log for T4, 1.68 log for T5 and 1.72 log for T6, and the mean total coliform reductions were: 1.11 log for T1, 1.09 log for T2, 2.29 log for T3, 2.35 log for T4, 1.6 log for T5 and 2.09 log for T6. Based on these results it can be concluded that protocols which used 200 ppm sodium hypochlorite for 15 to 30 min (T3 e T4), were the most effective, followed by treatment with 20% vinegar solution (T6). The latter method, however, turned the lettuce dark during the distribution period.
The Importance of Piagetian Reference for the Elucidation of Conceptual Development in Chemistry  [PDF]
Aldo Sena de Oliveira, Anderson Luiz Machado, Ana Carolina Araujo da Silva
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.73050
Abstract: Genetic epistemological studies underlie the development of methodological proposals for education. In order to reach an inference about the cognitive structure of children and adolescents, experiments based on the Piagetian clinical method are performed with infralogical operations. In achieving these inferences, it is suggested to carry out chemistry experiments seeking representation of children and adolescents with respect to the actions and reactions of said experiments. In this study, we present for the first time in the literature correlations between the Piagetian clinical method and classic experiments performed in chemistry labs. Thus seeking the contributions of chemistry to explain phenomena and support the learning of children as an alternative to the education and consequentially development of children.
Avalia o microbiológica das águas dos bebedouros do Campus I da Faculdade de Medicina do Triangulo Mineiro, em rela o à presen a de coliformes totais e fecais
Oliveira Ana Carolina Santana de,Terra Ana Paula Sarreta
Revista da Sociedade Brasileira de Medicina Tropical , 2004,
Corneal specular microscopy in infectious and noninfectious uveitis
Oliveira, Filipe de;Motta, Ana Carolina de Oliveira;Muccioli, Cristina;
Arquivos Brasileiros de Oftalmologia , 2009, DOI: 10.1590/S0004-27492009000400006
Abstract: purpose: involvement of the cornea endothelium during uveitis has not been extensively studied even though it might participate in or constitute a target of ocular inflammation. formation of keratic precipitates (kp) is a characteristic finding in several forms of uveitis. the aim of this prospective study was to examine the vicinity of keratic precipitates in infectious and noninfectious uveitis by specular microscopy. methods: patients with infectious and noninfectious uveitis in any activity level and presence of keratic precipitates were enrolled. the mean age was 40.5 years (± 14.2 years). a topcon sp-2000p noncontact specular microscope was used to capture endothelial images in the vicinity of keratic precipitates. automated morphometric analysis was done for cell size, cell density and cells coefficient of variation. statistical comparisons were made between the infectious and noninfectious groups. results: from the 25 patients enrolled in this study, 16 (44%) eyes presented infectious uveitis, 19 (53%) noninfectious uveitis and 1 (3%) eye was excluded due to the impossibility to obtain a specular image. the mean cell density estimated was 2,628 ± 204 cells/mm2 in infectious group and 2,622 ± 357 cells/mm2 in noninfectious group. the mean cellular area in infectious and noninfectious group was respectively 385 ± 31 μm2 and 390 ± 60 μm2. the coefficient of variation (%) of the cellular area in the vicinity of keratic precipitates was 26.36 ±3.44 in infectious and 27.69 ± 4.61 in noninfectious group. the differences between the groups were not statistically significant (p<0.005 / mann-whitney test) for the three morphologic variables. conclusion: the clinical applicability of specular microscopy in patients with uveitis can be an useful tool to evaluate the corneal endothelium in the presence of keratic precipitates, however the handicap of the specular image formation might not be discarded in some cases. the differences found were not clinically meaningful be
Morphological Patterns of a Hymenopteran Gall on the Leaflets of Caryocar brasiliense Camb. (Caryocaraceae)  [PDF]
Ana Carolina Ribeiro de Castro, Germano Le?o Demolin Leite, Denis Coelho de Oliveira, Rosy Mary dos Santos Isaias
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.37109
Abstract: Anatomical studies in the leaflet globoid galls of Caryocar brasiliense, the “pequi”, aimed to answer how oviposition and the feeding behavior of the galling herbivores altered the morphogenical patterns of the host plant. C. brasiliense globoid gall was 1.28 ± 0.20 mm × 0.90 ± 0.25 mm, with hairy surface; it is sessile and projected to the abaxial surface. Young galls were red while the mature ones were green. Preferentially, they were formed next to leaf margin and possessed one larval chamber containing a single galling specimen. Gall epidermis was uniseriate, with thicker cuticle and more hairy. In some spots, epidermis was substituted by periderm, which indicated the expression of a character usually absent in the leaf laminas. Morphological and anatomical features of these gall morphotype, such as its position in leaf lamina, the fact of being truly closed galls, with typical nutritive tissue involved by sclerenchyma, made them next to the pattern proposed for galls induced by some Hymenoptera.
Assessing Cleaner Energy Alternatives for Bus Transit in Rio de Janeiro: A Life Cycle Inventory Analysis  [PDF]
Márcio de Almeida D’Agosto, Cintia Machado de Oliveira, Fabiana do Couto Assump??o, Ana Carolina Peixoto Deveza
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.611107
Abstract: From 2003 to 2009 in Brazilian municipalities of over 60,000 inhabitants, buses accounted for more than 25% of urban trips. This trend is not expected to change in the medium term. Worldwide, buses rely on petroleum diesel as fuel. In Brazil, alternative fuels such as biodiesel, natural gas and ethanol are available and the choice among them should depend on the assessment of the entire life cycle of such fuels. This paper uses a Life Cycle Inventory, which is essential to the implementation of a Life Cycle Assessment, to assess six energy alternatives: petroleum diesel, biodiesel, petroleum diesel with 5% of biodiesel, compressed natural gas, additivated hydrous ethanol and dual-fuel system composed by petroleum diesel with 5% of biodiesel and compressed natural gas. In saving total energy consumption, pure petroleum diesel or mixed with 5% biodiesel and dual-fuel systems stand out, in that order. If renewable energy use and net carbon dioxide emissions reduction are the goals, ethanol and biodiesel should be given preference. The addition of 5% of biodiesel in petroleum diesel increases the share of renewable energy in the supply chain of petroleum diesel by 47.5% with an increase of 0.58% in total energy consumption and a reduction of 3.8% in net CO2 emissions during the life cycle. In the case of biodiesel, the addition of 5% of biodiesel in petroleum diesel increases the share of renewable energy in the supply chain by 51.15% with an increase of 0.03% in the total energy consumption and a decrease of 7% in net CO2 emissions in the life cycle. The use of 5% of biodiesel in petroleum diesel does not significantly affect the use of renewable energy (+0.69%) or total energy consumption (+0.04%) in ethanol supply chain, which already shows a great use of renewable energy input. However, a decrease of 9.29% in the net CO2 emissions in the supply chain occurs, which reaches 5.28% in the life cycle.
The Immune Response to Trypanosoma cruzi: Role of Toll-Like Receptors and Perspectives for Vaccine Development
Mauricio M. Rodrigues,Ana Carolina Oliveira,Maria Bellio
Journal of Parasitology Research , 2012, DOI: 10.1155/2012/507874
Abstract: In the past ten years, studies have shown the recognition of Trypanosoma cruzi-associated molecular patterns by members of the Toll-like receptor (TLR) family and demonstrated the crucial participation of different TLRs during the experimental infection with this parasite. In the present review, we will focus on the role of TLR-activated pathways in the modulation of both innate and acquired immune responses to T. cruzi infection, as well as discuss the state of the art of vaccine research and development against the causative agent of Chagas disease (or American trypanosomiasis). 1. Introduction Trypanosoma cruzi is an intracellular trypanosomatid protozoan, which is transmitted to the human host by blood-feeding reduviid bugs, members of the insect subfamily Triatominae. Other modes of transmission include oral infection through contaminated food, congenital transmission, blood transfusions, organ transplants, and by accidental laboratory inoculation. This parasite, as well as its vector and the disease it causes, was first described by Chagas in 1909 [1]. Presently, the World Health Organization (WHO) estimates that approximately 10 million people are infected [2]. While Chagas disease is endemic to Central and South America, in the last years infected individuals have also been registered among immigrants in the United States, Europe, and Japan [3]. Although most of these cases were imported from the endemic regions, vector-transmitted autochthonous infections have also been documented in the United States. This fact and the lack of mandatory screening for all blood and tissue donors point to a possible altered epidemiology of Chagas disease in a near future. The determinants of Chagas disease come from the burden and the lineage of the inoculated parasite, as well as the infection route and the immune competent status of the host. Two different phases of the disease follow the entrance of T. cruzi into the host (for a review see [4]). The acute phase lasts around two months and is asymptomatic in most infected individuals although some patients can present symptoms like prolonged fever, anorexia, nausea, vomiting, and diarrhea. During this phase, high numbers of parasites are frequently found in the host bloodstream and tissues, as well as high plasma levels of cytokines and intense activation of B and T lymphocytes. Also, lymphoadenopathy, splenomegaly, and intense inflammatory processes may be associated with parasite nests within tissues. A small percentage (5–10%) of infected individuals can develop a more severe condition, presenting
Woody medicinal plants of the caatinga in the state of Pernambuco (Northeast Brazil)
Silva, Ana Carolina Oliveira da;Albuquerque, Ulysses Paulino de;
Acta Botanica Brasilica , 2005, DOI: 10.1590/S0102-33062005000100003
Abstract: floristic and phytosociological studies undertaken in six areas of the state of pernambuco were selected with the aim of analyzing the relative importance of the woody medicinal plant species of pernambuco's caatinga from an ethnobotanical perspective. for the data analysis, only those identified up to the species level were selected and information on medicinal properties was obtained for each one from the literature. the relative importance was calculated for each species. from the 57 woody species, 22 had therapeutic indications; from these, anacardium occidentale l., tabebuia impetiginosa (mart. ex dc) standley, schinopsis brasiliensis engl., and myracrodruon urundeuva (engl.) fr. all. had the greatest values of relative importance. the correlation analysis made clear that the relative importance of the species is negatively correlated with the density and relative frequency (p<0.05). the most important species, in the ethnobotanical point view, are the most vulnerable, possible due to the systematic exploration they have been suffering. schinopsis brasiliensis and myracrodruon urundeuva are listed as endangered species and deserve special attention in the development of techniques of sustainable management, where both economic return and species conservation must be guaranteed. in depth studies that take into consideration each region's characteristics are necessary both from a floristic perspective and considering medicinal aspects, since each area seems to have its own woody medicinal flora, as suggested in the cluster analysis.
I cut my hair e I did my nails: evidência de transferência linguística na interlíngua de falantes brasileiros aprendizes de inglês como segunda língua?
Vilelai, Ana Carolina;Oliveira, Fernando Luiz Pereira de;
Trabalhos em Linguística Aplicada , 2010, DOI: 10.1590/S0103-18132010000100015
Abstract: this article evaluates whether an l1 influence (language transfer) can be found in the interlanguage production of brazilian subjects, learners/speakers of english as an l2, in contexts where the production of english causative-have construction (john had his hair cut) is expected. results from a small study conducted with thirty-eight brazilian subjects, distributed along three proficiency levels, are reported. the study applied jarvis' (2000) methodology for the study of language transfer. results point to the complexity of the language transfer phenomenon and to the importance of undertaking a statistical analysis of the data.
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