Licenciatura em Química (UAST)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/2945
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Item Análise da III Feira de Ciências e Mostra Científica de Serra Talhada - PE e seus impactos na aprendizagem e divulgação científica(2019) Siqueira, Francisca Suene Alcântara; Bezerra, Bruna Herculano da Silva; Câmara, Maria Suely Costa da; http://lattes.cnpq.br/9163311260887432; http://lattes.cnpq.br/1039531472437739; http://lattes.cnpq.br/4198097343466398Item Síntese do pigmento CoCr2O4 pelo método de gelatina comercial(2018) Sousa, Tassia Pereira de; Câmara, Maria Suely Costa da; http://lattes.cnpq.br/9163311260887432; http://lattes.cnpq.br/7879045291487919There is a growing interest of the ceramic industries in developing more stable pigments that are low cost and little environmental damage. The ceramic industries mainly use pigments of predominantly inorganic nature, such pigments are the most used because they havean excellent chemical and thermal stability besides a lower toxicity to the man and few environmental damages. The most commonly used inorganic pigments used in ceramics are mixed oxides with spinel structure and AB2O4. Spinels are one of the most interesting crystalline structures in the development of stable and chemically inert pigments. In this structure, ions of different oxidation states are present in both tetrahedral and octahedral sites. In addition, there are several ways of arranging the cationsat these sites (normal and inverse spinel). These characteristics led to the development of different colors, being these intense and stable, suitable for use as pigments. Among the compounds used as ceramic pigments, we have highlighted CoCr2O4which is a mineral oxide belonging to the group of spinel, such structures cover a group of well-establishedmagnetic materials that may have a green coloration. The objective of the present work was to synthesize the CoCr2O4pigment using commercial gelatin as precursor and to characterize the following techniques: Thermogravimetric analysis (TG), Xray diffraction (XRD), surface area (BET), Scanning electron microscopy (SEM) spectroscopy in the infrared region (FTIR), and colorimetric measurements by the CIEL*a*b*method. The route of synthesis used was confirmed viable from the results. Crystalline, monophasic and high surface area compounds were obtained. The powders presented green coloration with phase obtained from 500 ºC.Item Webqnano: estratégia de promoção do ensino por investigação num curso de formação de professores de química(2019-12-06) Silva, José Lucena Nunes da; Câmara, Maria Suely Costa da; Nascimento, Hemerson Henrique Ferreira do; http://lattes.cnpq.br/5532203781894397; http://lattes.cnpq.br/9163311260887432; http://lattes.cnpq.br/4579019874007933We are living times singed by fast changes; the rising of new technologies has made information access immediate. Those technologies have been gaining ground in the whole society but especially in school; their open access character as well as their dynamic usage in teaching-learning processes have become patent. With those new digital information and communications technologies (DICT), proposals for strategies based on those kinds of resources are more and more frequent in all modalities and stages of education. Hence, the WebQuest (WQ) is a tool for teachers settle reliable information from the web and conduct guided research activities with their students. In this scenario, we created, implemented and assessed potentialities of a WebQest on Nanosciene & Nanotchnology in a Chemistry teachers training course; the choice for that subject-matter is due to the science-technology assembly significance to that field and because of its influence in contemporary world. During the research process the interventional activities were conducted, in a qualitative approach, with a group of students from the Chemistry Teaching graduate course offered by the Federal Rural University of Pernambuco (UFRPE), at the Serra Talhada campus; regarding the research goals, it is qualified as an exploratory investigation and an evaluative study, to the methodological procedures. When it comes to data collection, it was conducted using a questionnaire, from students’ works and by audiography/transcription from its presentation in an eight class sequence. For data interpretation, we applied Moraes and Galiazzi (2006) Textual Discursive Analysis (TDA) and Rocha (2014) WebQuest adapted Bloom’s taxonomy. According to the results, we could conclude the media we produced had a good acceptance among students and proved to be a suitable pedagogical tool for mobilizing available resources on the web, besides stimulating a kind of inquiry-based learning. In doing so, the WQ strategy also proved to be a good environment for interaction and substantive knowledge construction.