TCC Química

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Análise da experimentação química nos livros didáticos do Ensino Médio : adequação segundo os critérios do PNLD e a realidade das Escolas Públicas Estaduais de Maceió
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2022-02-21) Souza, Davdson Luiz de; Ferreira Junior, Jésu Costa; Ferreira, Joacy Vicente; Azevedo, Edmar Marinho; http://lattes.cnpq.br/2213926589443334
ABSTRACT The present research aims to analyze how the editions of the book "Ser Protagonista - Química" referring to the years 2015 and 2018 of the PNLD, distributed to the High School in public schools, are proposing the experimental activities. For the analysis of the experiments the qualitative research was used in the guides of the textbook of 2015 and 2018 and in the literature. With that, the adequacy and inadequacies of the experiments found in the books were judged and judged as to whether they were mechanical, investigative, their level of dangerousness and materials necessary for the application of the practice. Through the analysis of the results it was verified that some experimental activities present in textbooks do not meet the guidelines of official documents for education. In addition, it was noticed that some experimental activities were not related to the studied content. Not being considered satisfactory in what concerns the promotion of learning in the works analyzed. Thus, we sought to correct the inadequacies through substitutions of reagents and in more unsuitable cases the substitution of the experiment as a whole.
Análise do perfil fitoquímico e da atividade antioxidante do extrato etanólico das folhas de Cecropia pachystachya T.
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2024-07-24) Franco, Simone Paes Bastos; Costa, Salvana Priscylla Manso; http://lattes.cnpq.br/7558499721074840; Sousa, Jonas dos Santos; http://lattes.cnpq.br/3193945439772961; Oliveira, João Victor Lessa de; http://lattes.cnpq.br/6645969528353731; Borges, Arthur Luy Tavares Ferreira; http://lattes.cnpq.br/1194184115234231
The practice of using medicinal plants to treat diseases has been passed down from generation to generation since ancient times. Due to their pharmacological potential, they have been the subject of several studies. The species Cecropia pachystachya, which belongs to the Cecropiaceae family and is popularly known as embaúba, can be cited as one of the most studied species due to its proven therapeutic properties as well as its chemical compounds. The aim of this study was to evaluate the antioxidant activity of the ethanolic extract of Cecropia pachystachya leaves and to quantify its phytochemical profile. To this end, after obtaining the crude ethanolic extract of Cecropia pachystachya leaves, tests were carried out to quantify phenolic compounds using the Folin-Ciocalteau method and quantify flavonoids using the reaction with aluminum chloride, as well as evaluating antioxidant activity using the DPPH free radical capture method. The results showed quantifications of 686.41 and 509.34 μg/mL for phenolic compounds and flavonoids, respectively. These results were higher than those found in the literature. And the minimum concentration that showed a 50% reduction in free radicals was 433.70 μg/mL. According to the literature, this result can be explained by the quantification of bioactive compounds present in the species. In view of the above, it was possible to conclude that Cecropia pachystachya can be considered a therapeutic alternative for the pharmaceutical and cosmetics industries.
Avaliação da aprendizagem no ensino médio: possibilidades e estratégias para o ensino da química
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2023-06-26) Rosendo, Aline Silva; Nascimento, Flávia Braga do; http://lattes.cnpq.br/3585720352113766; Nascimento, Flávia Braga do; http://lattes.cnpq.br/3585720352113766; Brasileiro , Regina Maria de Oliveira; http://lattes.cnpq.br/4146119273576569; Silva, Eduardo Lima da
This study aims to demonstrate to teachers and future teachers the diversity of possibilities that can be used in the evaluation process of high school chemistry students. To achieve our research objective, we decided to develop an educational product that brings together various specific assessment strategies for teaching Chemistry in high school. We employed an approach that involved qualitative analysis of data collected through a questionnaire distributed via Google Forms, targeting teachers who were part of our daily context and met the established criteria: having taught high school students at some point in their careers. Additionally, we conducted a comprehensive literature review to identify successful assessment strategies that empower students, address high school Chemistry content, and are practical and accessible for incorporation into our educational product. The results revealed the importance of developing an educational product that combines different assessment strategies. However, it is important to acknowledge the limitations of this study as the chosen strategies could not be implemented, which would have provided a broader understanding of their practical application. Nevertheless, the identified and proposed strategies in this work provide a solid foundation for improving assessment practices among high school Chemistry teachers. We believe that the developed educational product will positively contribute to enhancing pedagogical practices and the quality of education in the field of Chemistry.
Desenvolvimento de sensor eletroquímico baseado em eletrodos impressos de carbono, modificados com Ácido Polixanturênico para detecção da Afloxitina B1
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2019-12-05) Silva, Jéssica da Conceição da; Lima, Phabyanno Rodrigues; http://lattes.cnpq.br/9334426018309756; Cavalcante, Sarah Kelly Melo; http://lattes.cnpq.br/0820477133147241; Silva, Jailson dos Santos
In the present work we describe the development of an electrode that uses xanturenic acid (AX) for the first time as an electrochemical probe, through a simple and efficient Aano-activated, nanomaterial modified carbon printed electrode immobilized with aptamers for the detection of aflotoxin. B1 (AFB1). The sensor surface was characterized by voltammetric techniques such as differential pulse voltammetry (VPD) and cyclic voltammetry (VC), which were used to study the behavior of modified electrodes, to optimize experimental parameters and obtain kinetic parameters. as a study of speed and pH. The electroactive species, quinone / hydroquinone, was electrogenerated in situ on the modified nanomaterials and AX electrode after cycles in the potential range between 0.5 and -1.0 vs. Ag at first sweep in 0.1 mol L-1 phosphate buffer (pH 5.5) with sweep rate of 50 mV s-1. After the activation process, the potential range around the redox quinone / hydroquinone pair was selected and the voltammograms were recorded at different speeds (5-20 mV s-1), then aptamer immobilization was performed, applied with the intention of to test the electrocatalytic activity for AFB1 oxidation. In addition, the electroactive species generated on the electrode surface showed inhibition against the immobilized aptamer when reacting with AFB1, causing a charge retention. Thus, from the results obtained the electrochemical aptensor developed showed a promising alternative to be applied in tests with real samples.
Determinação de ácido ascórbico: um sensor eletroquímico à base de pasta de carbono com 4-nitroanilina adsorvida em silica gel modificada
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2019-12-05) Santos, Monik Tamíres Silva; Cavalcante, Sarah Kelly Melo; http://lattes.cnpq.br/0820477133147241; Lima, Phabyanno Rodrigues; http://lattes.cnpq.br/9334426018309756; Cavalcante, Sarah Kelly Melo; http://lattes.cnpq.br/0820477133147241; Silva, Jailson dos Santos
The present work describes the development of a multiple wall carbon nanotube paste electrode (MWCNTPE) based on 4-nitroaniline (4NA) adsorbed onto silica gel modified with zirconium oxide (SZ) to detect ascorbic acid (AA). The sensing surface was characterized by Thermogravimetric Analysis (TGA), Scanning Electron Microscopy (SEM) and Infrared Spectroscopy (FTIR). The electroactive species, hydroxylamine / nitrous (R-NHOH / R-NO), was electrogenerated in situ from 4Nitroaniline after cycling in the potential range between 0.5 and -1.0 vs. Ag / AgCl in the first scan in 0.1 mol L-1 PBS buffer (pH 7.0) with a scanning rate of 0.02 Vs-1. The modified electrode showed efficient electrocatalytic activity against the oxidation of ascorbic acid in 0.3 V vs. Ag / AgCl. Electrochemical measurements including Cyclic Voltammetry (VC) and Chronoamperometry were used to study the behavior of the surface of the modified electrode used. These techniques were used to optimize the experimental parameters. Thus, under optimized conditions, the sensor presented a linear response range of 0.5 - 3.0 μmol.L-1, LD (0.15 μmol.L-1), LQ (0.48 μmol.L-1) and sensitivity of 7.60 (mA.L.mmol-1) adding to the sensor positive factors in sensitivity and selectivity. This sensor was applied for the amperometric determination of AA in food samples. The results were consistent with those obtained with the standard titration procedure.
Estágio supervisionada do curso de Licenciatura em Química do Instituto Federal de Alagoas: reflexões sobre sua colaboração na formação dos licenciados
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2019-11-28) Santos, Amanda Karla dos; Oliveira, Elisabete Duarte de; http://lattes.cnpq.br/7781886522973384; Oliveira, Maria Regina Brasileiro de; http://lattes.cnpq.br/4146119273576569; Ferreira Junior, Jésu Costa; http://lattes.cnpq.br/5859354241648167
This work aimed to know the importance and perspectives of supervised internship for students of the undergraduate degree in chemistry at the Federal Institute of Alagoas -IFAL, in its formation. The methodology used in the study focused on the subjectivities and particularities of the subject, not dissociating the social actors from their realities, so it had as its field of data collection the environment of the studied subjects. As for the legal contribution, the work focused on laws, resolutions, ordinances that dealt with supervised internship practice, LDB and the pedagogical project of the course. It was mainly supported by the authors: Selma Garrido Pimenta (2012), Maria Socorro Lucena Lima (2012), Cleoni Maria Barboza Fernandes (2010) and Cipriano Luckesi (1994), for discussing the concepts and conceptions of practice, theory, praxis and evaluation present. in teacher training courses. Among the results found was the verification of the low use of the internship as a reflection agent in the undergraduate degree in chemistry, a fact that could be changed if the internship were used as the origin of the formation, axis of relationship between the disciplines, theoretically instrumentalizing the interns. , developing readings, analysis and problematization of their praxis and identities, as a future educator.
Estratégias pedagógicas práticas na Educação de Jovens e Adultos: explorando o mundo das Ciências da Natureza
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2024-07-30) Souza, Everton de Oliveira; Ferreira Júnior, Jésu Costa; http://lattes.cnpq.br/5859354241648167; Silva, Fred Willames Ferreira dos Santos; Fragoso, Stella Freitas de Queiroz; Nascimento, Flávia Braga do; http://lattes.cnpq.br/3585720352113766; Santos, Eduardo Lima
Youth and Adult Education (EJA) is a teaching modality that aims to provide training for those who were unable to complete their studies on time. This modality mostly involves students who, for some specific reason, had to leave school. and see in this modality the possibility of training and thus entering the formal job market, many of these students had been out of the classroom for a long time, which makes the teacher's job even more difficult. The purpose of this study is to understand how the teaching-learning process and attendance can be improved through practical classes involving students from Youth and Adult Education at Escola Estadual Geraldo Melo dos Santos, in the subject of natural sciences. In classes, everyday subjects and practices are covered and new compounds are also presented that are unknown to their knowledge, but which are linked to their daily lives. Students play an active role in classes through practical activities. Furthermore, we seek to exemplify the relevance of science in everyday life, focusing on the concepts presented in the subject, which are part of the modular EJA planning.
O lúdico na aprendizagem de vidrarias de laboratório de química na Escola Estadual Dr. Antônio Gomes de Barros
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2018-06-08) Silva, Eronildo Ferreira da; Freitas, Alan John Duarte de; http://lattes.cnpq.br/7222112856028905; Freitas, Johnnatan Duarte de; http://lattes.cnpq.br/4999402869058858; Lira, Lidiane Evangelista; http://lattes.cnpq.br/7428353456925450; Silva, Kleyfton Soares da; http://lattes.cnpq.br/9040257542465304; Morilla, Demetrius Pereira; http://lattes.cnpq.br/5723725916193842; Sousa, Jonas dos Santos; http://lattes.cnpq.br/3193945439772961; Soares, Janaína Gomes; http://lattes.cnpq.br/9254836310407411
This research aimed to approach an educational methodology that differs from traditional teaching with students of the 1st year of high school in a state public school, located in the municipality of Novo Lino, in the state of Alagoas, and evaluate learning outcomes by applying the game didactic "LEARNING GLASSES", in which it presents the main materials and laboratory glassware, also trying to help students become more interested, attentive and participative. For this construction was used the case study, which approached the playful as methodology in teaching and learning chemistry. Throughout the study and the findings, it was possible to confirm that it is feasible to approach a different methodology when applied correctly in teaching and learning.
O processo de aprendizagem em química: análises dos instrumentos avaliativos em uma escola estadual de educação básica
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2021-10-13) Santos, Duciêda Narciso dos; Bastos, Alexandre Fleming Vasques; http://lattes.cnpq.br/7239157167819125; Ferreira Júnior, Jésu Costa; http://lattes.cnpq.br/5859354241648167; Serbim, Flávia Braga do Nascimento; http://lattes.cnpq.br/3585720352113766; Brasileiro, Regina Maria de Oliveira; http://lattes.cnpq.br/4146119273576569
There are several methods of evaluating the student and the evaluation instruments used and applied in an appropriate way, considering the context in which the students are inserted, as well as the teacher's methodology and conceptions adopted by him, favoring the students' teaching-learning process. This research analyzed the efficiency and performance of the evaluation instruments used by a chemistry teacher in his classes in a high school class in a basic education institution in the state network of Alagoas. This research was qualitative in a case study in which the methods of inductive approach and observational procedure were used. The research period was between March and August 2019 and the data production techniques were field notes, photos, questionnaires and document analysis. Questionnaires were applied with the chemistry teacher and students of the class and the documents analyzed were the evaluative instruments used in the classroom during the course of the research. The analyzes and discussions on the chemistry evaluation instruments were carried out based on data collected at the school, as well as on the evaluation of printed materials, which was used as a resource to prove the veracity of the research. The research was based on LUCKESI's theory, but other pedagogical theories defended by several scholars in the area were used. During the approach, some reflections on the concepts of assessment and on the assessment instruments used by the teacher can be noted. In the results of our analysis, it was evident that the teacher prioritized the evaluation focused on the traditional method, however, with some vestiges of the constructivist conception, as well as the progressive one in its pedagogical proposal. Therefore, such research helps us to understand the importance of selecting assessment instruments in an adequate way to obtain a positive diagnosis of the chemistry assessment.
O projeto de vida como componente curricular no Ensino Médio do estado de Alagoas: autonomia, protagonismo, e o pensamento crítico
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2024-03-27) Lima Neto, Isnar Lopes de; Serbim, Flavia Braga do Nascimento; Limeira, Ana Cristina dos Santos; Silva, Jéssica da Conceição
The reform of the new secondary education presents as the central axis of its reflections youth protagonism, autonomy, critical awareness, flexible curriculum, and the dichotomy between work and school. The objective of the study is to understand how the life project discipline promotes autonomy, protagonism, critical thinking, and prepares students for the world of work in state education networks in high school. For this, the method used consisted of surveying the official documents available on the website of the Alagoas State Department of Education that support the implementation of the life project curricular component, analyzing the material through a qualitative approach. The investigation reveals a major challenge of the new high school model, to guarantee the comprehensive training of students, prioritizing the development of socio-emotional skills, and at the same time responding to the desires of young people, guaranteeing qualification for the world of work and the continuity of studies, often failing to have a solid theoretical pedagogical basis in the development of the material. Finally, it can be understood that the life project requires critical reflection in relation to the proposals made in its formulation, looking at the context of secondary education reform, as it is an emerging discipline that does not derive from a disciplinary field or specific area of knowledge.
Sensores eletroquímicos para determinação de agroquímicos: revisão de métodos empregados para o herbicida Metribuzin
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2023-12-04) Mariano, Nicholas Emmanuel Constantino; Souza, Antonio Albuquerque de; http://lattes.cnpq.br/7344135285199504; Freitas, Alan John Duarte de; http://lattes.cnpq.br/7222112856028905; Lopes, Cleylton Bezerra; http://lattes.cnpq.br/4000861323429729
The increasing demand for food has led to the development of various control control agents to increase crop yields. And due to the population increase, it became necessary to use these agents to meet food demand. However, its excess causes harm to human health and the environment. Metribuzin (MTZ) is one of the most common herbicides for the control of organic weeds, however, due to its increase and excess, it is necessary to monitor and determine this herbicide, which is essential to reduce risks to the environment and human health. One of the alternatives that has been growing for its determination is the use of electrochemical sensors that consist of translating the chemical information of certain analytes into measurable electrical signals (STRADIOTTO; YAMANAKA; ZANONI, 2003; KIMMEL et al., 2012). These devices can have high sensitivity, are easy to prepare and have a relative low cost. They can also be characterized by details, as it is possible to analyze molecules of environmental interest (ŠVORC; RIEVAJ; BUSTIN, 2013), foods (PACHECO et al., 2015). In this work, some literary sensors were selected in which the authors provided the construction of these electrochemicals for the determination of Metribuzin using different mediators where: (Lima, 2009) used carbon paste/Nujol to determine the MTZ; (Fatah, 2022) used NTCPM/MIP-EPC to determine the MTZ; (Moreno, 2009) used a Bismuth Film Electrode for determination; (Ranganatha, 2022) used CS-PC/BPE/ECV to determine MTZ; (Yamuna, 2022) used NTO-eGR/ECV to determine MTZ.
Sesnsibilização de pós de TIO2 modelados por esferas de látex para aplicação em células solares
(Instituto Federal de Educação Ciência e Tecnologia de Alagoas, 2018-08-15) Silva, Antony Ernesto dos Santos; Barros Filho, Djalma de Albuquerque; http://lattes.cnpq.br/9259521036882745; Freitas, Johnnatan Duarte de; http://lattes.cnpq.br/4999402869058858; Costa, Alex Emanuel Barros; http://lattes.cnpq.br/2231272728491909; Silva, Antonio Osimar Sousa da; http://lattes.cnpq.br/5289388662589522
The world's energy supply is derived from the burning of fossil fuels, in particular oil, producing greenhouse gases, which causes damage to the ozone layer, in addition to changing the planet's temperature and to threatening life in general. Therefore it is necessary to use natural, renewable energy sources, such as solar energy for example. Brazilian Northeast has one of the highest rates of solar radiation in the country, which makes it feasible to use solar energy in this region. Thus, this work has the objective of presenting the formation of Dye Sensitized Solar Cells (DSSCs), with semiconductor films made of titania (TiO2) powders, templated by latex spheres. These films are sensitized by ruthenium dye complexes, which makes their use relatively applicable in the absorption of solar energy. It will be possible later to convert solar energy into electric energy through the photovoltaic effect. TiO2 powders used in this work were obtained from two latex bead molds: sedimented powders and solvent controlled evaporation films (ECS). The results show that TiO2 modeling by both molds was not efficient, because the film presented a compact surface, decreasing the porosity of titania film. This can lead to a non-anchoring of the dye sensitizer on the surface of the semiconductor film and also poor penetration of the redox pair therein and the final result is a low absorption of sun light by the film. Another factor to decrease titania sensitization was the presence of carbon in during densification process, since the carbon was not completely removed. Carbon makes a surface layer that competed with the sensitizing dye during its anchoring in semiconductor film and increased the recombination of electron-hole pair. It is concluded that topography of látex beads and the presence of carbon during calcination of TiO2 powders made it difficult to absorb light when sensitized, becoming a challenge its application in DSSCs. An alternative to solve this problem is the use of TiO2 powders when obtained through templates coated on microscope glass slides by ECS technique. This will ensure an efficient porosity of titania films

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