A reprodução de experimentos científicos em laboratório é frequentemente difícil, devido ao número de alunos por turma, insuficiência de equipamentos ou à incompatibilidade do tempo necessário à realização dos experimentos. Por outro lado, o medo de manusear circuitos elétricos é sem dúvida uma das causas do baixo rendimento dos alunos em eletricidade. Diante dessa perspectiva, propusemos o desenvolvimento de roteiros experimentais de Eletrodinâmica utilizando os simuladores virtuais do PhET (Physics Education Technology Project), da Universidade do Colorado (EUA) como metodologia de ensino. O objetivo da atividade foi utilizar a simulação como ferramenta facilitadora da aprendizagem sobre o funcionamento de um circuito elétrico. A proposta foi aplicada a alunos do 3º ano do Curso Técnico de Mineração do Instituto Federal de Educação, Ciência e Tecnologia do Amapá e envolveu a interação em um ambiente virtual, tendo como suporte conceitos decorrentes da perspectiva de Vygotsky. Para a construção e análise de dados trabalhou-se com levantamento bibliográfico, coleta de dados por meio de testes, roteiro de entrevista e observação in loco. Os resultados obtidos indicaram boa aceitação da proposta, na medida em que o uso da tecnologia teve um sentido transformador na prática pedagógica, ou seja, que o PhET não foi usado simplesmente para reproduzir o modelo tradicional de ensino, mas para criar situações de aprendizado sobre Eletrodinâmica. A atividade contribuiu para fortalecer uma visão construtivista do processo de aprendizagem, destacando o forte envolvimento dos alunos na construção do conhecimento ao integrar ideias prévias às ferramentas de aprendizagem.

Macrobrachium amazonicum is a shrimp species distributed in freshwater habitats of Neotropical regions and is of great importance for the Amazonian economy. This study evaluated the effects of temperature increase on the survival and growth of M. amazonicum. For this, we distributed 360 M. amazonicum juveniles in 70 L tanks, and carried out a 90-day experiment with three treatments (T0: 28 ± 0.5 °C, or room temperature; T1: 30 ± 0.2 °C; T2: 32 ± 0.2 °C), using 4 replicate tanks each with 30 individual shrimp. Culture-tanks were connected to a recirculation system with biofiltration and constant aeration. Animals were fed twice a day using shrimp pelleted commercial food. After 90 days of trial, the total length and body mass gain of the animals cultured at room temperature was 78% and 433%, respectively. The specific growth rate, condition factor, weight gain, and length and survival of animals cultured at 30 and 32 °C were lower than those cultivated at 28 °C, and feed conversion was higher. Therefore, water temperature of 30 and 32 °C may compromise growth and survival of M. amazonicum during cultivation, none of the extreme temperatures may be recommended in practice.

This study has investigated the influence of unilateral eyestalk ablation on the survival, molting frequency, fecundity, reproductive output, and fertility of M. amazonicum females. We divided 96 females into with ablation and without ablation groups with six replicates. Water quality, growth, survival rate, intermolt period, molts number, and ovigerous females over a 90-day period were monitored. Unilateral eyestalk ablation reduced intermolt period by 30% and increased molts number, ovigerous females, and reproductive output. Our findings indicate that unilateral eyestalk ablation positively influences reproduction in M. amazonicum and is appropriate for females of this species having a body length of ≥ 70 mm.

Aquaponics is a science that integrates animal aquatic production with vegetable culture in recirculating water systems. The performance of an aquaponics system using constructed semi-dry wetland with lettuce (Lactuca sativa L.) planted on treating wastewater of culture of shrimp Macrobrachium amazonicum was evaluated. Each aquaponics module consisted in four culture tanks (1 m 3 tank −1), conical sedimentation tank (0.1 m 3), circular holding tank (0.2 m 3), and constructed semi-dry wetland (0.2 m × 1.0 m × 4.0 m). Post larvae (PL) shrimps with an initial average mass of 314 ± 4.75 mg were stocked at density treatments in quadruplicate: (A) 40 shrimps m −2 , (B) 80 shrimps m −2 , and (C) 120 shrimps m −2. Our results showed the average final mass of shrimps had a slight reduction at the density 80 and 120 shrimps. However, it did not differ significantly between the treatments. The ultimate survival and productivity were higher in density 80 and 120 shrimps. The maximum biomass productivity occurred at the treatment with density 120 shrimps. The aquaponics recirculation system using constructed semi-dry wetlands with lettuce adequately treated the water at the densities tested. Various water quality parameters were deemed suitable for shrimp culture, but for lettuce not, especially the temperature. The shrimp density was inappropriate which limited the system to accumulate and increase the concentration of nutrients to vegetables with lessening the yield. Nonetheless, the system with higher density has higher nutrient content that plants demonstrated significantly better growth and yield. The results showed the potential use of organics waste generated in a family lettuce hydroponic production, but for a commercial production is indicated supplementation with nutrients like calcium, magnesium, and potassium in the water.

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Com base nas novas dinâmicas pedagógicas que buscam reformular as relações de ensino-aprendizagem, ainda caracterizadas pela rigidez do ensino tradicional, esta pesquisa destaca a prática pedagógica interdisciplinar, investigando a existência dela nos cursos de ensino médio integrado (EMI) do Instituto Federal do Amapá (Ifap)/Campus Macapá. A pesquisa utiliza a abordagem qualitativa, realizando a análise documental dos planos pedagógicos dos cursos e a investigação sobre a submissão de projetos de ensino com a temática interdisciplinar. Foi aplicado questionário aos docentes dos cursos de EMI para analisar a adoção de práticas pedagógicas interdisciplinares em sala de aula e verificar a opinião deles quanto às potencialidades e/ou limitações que tais práticas encontram no Campus Macapá. Os resultados constatam a existência de limitações de várias ordens (estruturais e formativas) que contribuem para que as práticas interdisciplinares ainda sejam pouco trabalhadas no EMI do Ifap/ Campus Macapá.

Le National High School Examination (ENEM) est un outil d’évaluation et sélectif permettant aux étudiants d’entrer dans l’enseignement supérieur. Les Instituts fédéraux d’éducation, de science et de technologie (IFs) sont des institutions créées par le gouvernement fédéral dans le but de former des professionnels compétents. Le but de cette étude est de comparer le contenu des questions de physique de l’Examen national du secondaire (ENEM) entre les années 2014 et 2018 avec le contenu du programme du cours de chimie technique à l’Institut fédéral d’Amapá (IFAP). L’enseignement de la physique dans le cours technique de chimie à l’IFAP ne présente pas de division priorisant les matières les plus présentes à l’ENEM. ENEM contextualise généralement ses questions. Cela pourrait être une pratique courante en physique au lycée, car cela vous aiderait à mieux comprendre. De plus, il est nécessaire de ne pas fragmenter le contenu lors de l’enseignement, ni que sa composition avec d’autres matières. Le cours technique de la FIPA ne serait pas le lieu d’étude approprié pour ceux qui veulent simplement terminer leurs études secondaires. Le contenu va au-delà de ce qui est requis, mais avec des découpes adaptées à la partie technique, y compris les pratiques de laboratoire et les disciplines strictement techniques. L’absence d’interdisciplinarité et de contextualisation rend difficile l’absorption du contenu, formant des étudiants ayant des difficultés à penser la physique.

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