01.1 - Graduação (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2
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Resultados da Pesquisa
Item Percepções de professores de Química em formação inicial acerca de uma intervenção didática com abordagem CTSA planejada para promover a alfabetização científica(2025-03-17) Silva, Sergiany Sandrelli Santos da; Firme, Ruth do Nascimento; http://lattes.cnpq.br/7234636790850019; http://lattes.cnpq.br/6898348167448044Nesta pesquisa temos o objetivo de analisar percepções de professores de Química em formação inicial acerca de uma intervenção didática com abordagem CTSA planejada, a partir do tema Microplásticos, para promover a Alfabetização Científica. A pesquisa foi qualitativa; contou com a participação de dez licenciandos em Química que cursaram pelo menos uma das disciplinas do curso cujas ementas são voltadas para a abordagem CTS; e foi desenvolvida em quatro etapas metodológicas: planejamento de uma intervenção didática fundamentada na abordagem CTSA e estruturada a partir dos eixos da AC propostos por Sasseron (2008) e da espiral de responsabilidade de Waks (1992) com o tema Microplásticos (1ª etapa); elaboração do questionário (2ª etapa); contato, convite e envio do questionário e do Termo de Consentimento Livre e Esclarecido (TCLE) para os participantes da pesquisa (3ª etapa); e análise dos dados (4ª etapa). Como resultado da pesquisa, podemos destacar que, com base na análise das respostas dos licenciandos ao questionário, a intervenção didática apresenta potencial para promover a AC, ao contemplar os três eixos estruturantes propostos por Sasseron (2008). Além disso, contribuições e limitações da intervenção didática foram apontadas pelos licenciandos. Como contribuições, eles mencionaram, por exemplo, consciência ética sobre o uso e descarte do plástico e a aplicação prática do conhecimento e a formação de cidadãos responsáveis. E como limitações, os licenciandos apontaram, dentre outras, a limitação de tempo para explorar as relações CTSA e a formação docente adequada. Portanto, para pesquisas futuras sobre a AC no ensino de Química, sugerimos a implementação da intervenção didática em tela em contextos reais de ensino para investigar a promoção da AC dos estudantes nesses contextos.Item Microplásticos do plâncton na porção norte da APA Costa dos Corais (Tamandaré, Brasil)(2019-12-13) Ferreira, Lucas Xavier; Melo Júnior, Mauro de; http://lattes.cnpq.br/6735233221650148; http://lattes.cnpq.br/7507756194543034Microplastics are particles smaller than 5 mm and can be broadly classified as: filamentous, hard fragments and soft fragments. These particles are among the main current solid contaminants in the marine environment. Such fragments can be released into the environment in different ways, such as degradation itself through biotic or abiotic factors. After being degraded, these particles can be suspended in the water column, thus being able to be ingested by organisms, especially filters at the base of the food chain. The work aims to characterize the plankton microplastics in the waters that bathe the northern portion of the Costa dos Corais Environmental Protection Area, in Tamandaré (PE), aiming at the evaluation of three planktonic compartments in the area (estuarine plume, in the reefs and in the bay ). Samples from 4 campaigns carried out between Sep / 2017 and Mar / 2018 were analyzed, aiming to sample periods with different rainfall regimes, always at low water (to better establish the influence of estuarine plumes). The analyzed microplastics were quantified and classified according to type. To confirm the visually screened microplastics, tests were performed with nitric acid (HNO3). The results show that there is a higher incidence of filamentous microplastics (12 ± 13 mp / m³), compared to other types. The presence of filamentous microplastics reached an average density of 16.08 ± 16.22 mp m³ in the plume, in the dry period, and in the rainy period it had an average of 21.62 ± 20.77 mp m³ in the reefs. . The densities of filamentous microplastics were significantly different between points (plume, bay and reefs). In each period, even with this variation between the points, the data indicate that there was a variation between the points, but if compared to other studies, the variation is not significant, although the bay has shown variation in relation to the other areas. In the present study, the seasonal period did not have a significant influence on the increase in the presence of microplastics in the studied points, even though microplastics are common in estuarine systems in several parts of the world, the fact that there were no seasonal differences in the studied points ( it was expected that during the rains the occurrence of microplastics would be higher) due to the insertion of the Ilhetas and Mamucabas estuaries in a protected region (APA Guadalupe and ReBio de Saltinho).Item Ocorrência e distribuição de microplásticos no Arquipélago de Abrolhos(2019-06-10) Silva, Myller Cardoso da; Melo Júnior, Mauro de; http://lattes.cnpq.br/6735233221650148; http://lattes.cnpq.br/1951306508450135Plastic pollution is a major threat to oceanic, coastal and marine biota environments and has been documented for the last 40 years. The study of pelagic microplastics in islands of the Atlantic Ocean is recurrent, where the islands retain plastics of the adjacent sea by different metaoceanographics mechanisms, being one of the main factors for the decline of native species and degradation of the natural beauty. The objectives of this work were to determine the abundance, spatial distribution, composition and classification of microplastics in the Abrolhos Archipelago. In addition to improving the technique of quantification and measurement of particles through the process of visual identification and digestion of organic particles by nitric acid (HNO₃), and compare the samples obtained in different mesh apertures (64 μm and 200 μm). The Abrolhos reef complex covers the largest area of coral reefs in Brazil and the entire South Atlantic Ocean. The study region concentrated on points located about 10 - 70 km offshore. To identify the particles, techniques of visual counting and digestion by nitric acid were used. The densities underwent non-parametric statistical tests such as Wilcoxon / Mann -Whitney and Kruskal Wallis) to compare the central trends of the samples. Microplastics were classified according to their type: filaments, soft plastics, hard plastics and styrofoam. The 64 μm mesh was more effective in the capture of microplastics (4.19 mp / m-3) and 1.87 mp / m-3 in the 200 μm mesh. The two networks presented a similar general collection composition, since both had higher densities of filaments (64 μm 2.49 mp / m-3 and 2.15 mp / m-3 in the 200 μm mesh). The region farthest from the continent has a higher density of microplastics, as well as in the region closest to the coast. The use of the smaller mesh increases the collection capacity of plastic items, especially for filaments. Further research is needed to understand the distribution of microplastics and seek a mitigation of the various environmental problems caused by them.