O estudo de temas de interesse para a sociedade nas aulas de Química é estratégico, pois permite que os alunos compreendam melhor a relação entre os conceitos teóricos e práticos. Por exemplo, o tema biodiesel pode ser utilizado para abordar os processos da química aliados às questões ambientais e sociais. Dessa forma, a presente revisão bibliográfica buscou avaliar os efeitos da introdução do tema biodiesel no ensino de Química de algumas escolas do Ensino Médio. O material bibliográfico foi acessado nas plataformas Google Acadêmico e Periódicos da Capes. Os resultados destacaram os benefícios de se trabalhar o assunto biodiesel em sala de aula com o aumento na compreensão de alguns conceitos químicos, como, por exemplo, a reação de transesterificação; o que resultou no aumento do interesse dos alunos pelo aprendizado e desempenho acadêmico. Isso pode ser associado, provavelmente, a curiosidade do aluno com o mundo que o cerca.

Background/Objectives: The incorporation of bioactive molecules into mesoporous carriers is a promising strategy to improve stability, solubility, and therapeutic efficacy. In this study, we report for the first time the encapsulation of the synthetic chalcone 4-Cl into KIT-6 mesoporous silica and evaluate its cytotoxicity, toxicological profile, and pharmacological activities (antinociceptive, anti-inflammatory, and anxiolytic) using an in vivo zebrafish (Danio rerio) model. Methods: Zebrafish were orally dosed with 4-Cl, 4-Cl/KIT-6, or KIT-6 (4, 20, 40 mg/kg) and mortality was recorded for 96 h. For analgesia, zebrafish pretreated with 4-Cl, 4-Cl/KIT-6, KIT-6, or morphine received a tail stimulus (0.1% formalin). Locomotor activity (quadrant crossings) was monitored for 30 min to assess analgesia (neurogenic: 0–5 min; inflammatory: 15–30 min). For inflammation, abdominal edema and weight gain were assessed 4 h after intraperitoneal carrageenan (1.5%). Zebrafish (n = 6/group) received 4-Cl, 4-Cl/KIT-6, or KIT-6 (4, 20, 40 mg/kg, p.o.). Controls received ibuprofen (100 mg/kg, p.o.) or 3% DMSO. Weight was measured hourly for 4 h post-carrageenan (difference between baseline and hourly weights). Results: Physicochemical characterizations confirmed successful encapsulation without compromising the ordered structure of KIT-6, as evidenced by a significant reduction in surface area and pore volume, indicating efficient drug incorporation. In vivo assays demonstrated that the 4-Cl/KIT-6 formulation maintained the pharmacological activities of the free chalcone, reduced toxicity, and, notably, revealed a significant anxiolytic effect for the first time. Conclusions: These findings highlight KIT-6 as a promising platform for chalcone delivery systems and provide a solid basis for future preclinical investigations.

In the textile industry, the processing of fibers and the application of dyes require high water consumption, producing high rates of industrial waste. Dyes, in turn, have great stability, which can result in highly contaminated effluents. If disposed of incorrectly, this waste can cause serious problems to the environment and human health. In this sense, it is essential to decontaminate these effluents before releasing them into water bodies. To this end, the adsorption process has proven to be very effective in removing dyes from wastewater in the textile sector. Aiming at the optimization and economic viability of this process, this investigation focuses on the use of an agro-industrial residue, the silver banana peel (Musa paradisiaca), as an alternative biosorbent. Based on an experimental and applied methodology, tests to determine pH were applied in order to determine the most suitable pH for the procedure. Variations in adsorbent concentrations were also evaluated to obtain the best use of the material in removing the methylene blue dye. The results obtained in the biosorption tests indicated 99.5% removal, demonstrating high efficiency in the process. In this way, the silver banana peel (Musa paradisiaca) presented itself as an efficient biosorbent in the adsorption of methylene blue dye, becoming a sustainable and low-cost alternative.