“Vegan” and “sustainable” characteristics are strong claim trends behind the development of innovative skincare, fragrances, and makeup products. This created a need in the market for compliant ingredients. To date, there have been no records evidencing the use of the microalgae Neochloris oleoabundans (NA) in dermocosmetics. Therefore, we studied the applicability of such a natural compound in this context. NA was cultivated, and the scavenging activity (SA) of the NA extracts was evaluated. The highest SA was from the aqueous extract (54.8% ± 2.1%), being higher than that of the positive control. Two hydrogels were prepared with 1.0% ammonium acryloyldimethyltaurate/VP copolymer: (1) control gel; and (2) gel with a 1.0% NA aqueous extract. In vivo experiments were performed in healthy male and female volunteers with skin phototypes of II–IV. The stratum corneum (SC) hydration and the transepidermal water loss (TEWL) were measured in the forearm of participants to determine their biocompatibility. This parameter was determined by skin bioengineering measurements, confirming that SC hydration and TEWL were not affected by the samples. The laser Doppler measurements results showed a delayed erythema onset in the sites, where the NA hydrogel was applied. The results confirmed the biocompatibility and the anti-inflammatory activity of an innovative ingredient derived from microalgae suitable for a natural and vegan lifestyle.
ResumoO ensino de Ciências no Ensino Fundamental permite o aprendizado de conceitos básicos, possibilitando ao aluno desenvolver habilidades de investigação, pensamento lógico e ético, garantindo sua inserção à cultura científica. Entretanto, esse ensino nos anos iniciais é descontextualizado, pois utiliza uma linguagem distante da realidade dos alunos, gerando desinteresse. É preciso estabelecer o diálogo entre os saberes populares e científicos. A temática "Plantas Medicinais" mostra-se uma forma de favorecer a aprendizagem, sendo reconhecida a necessidade da valorização das práticas tradicionais/populares. Neste texto, relatamos uma experiência que teve por objetivo elaborar e desenvolver uma proposta de ensino com o objetivo de promover a aprendizagem significativa sobre Plantas medicinais, por meio de atividades práticas diversas, buscando-se favorecer o diálogo entre os saberes científicos e as experiências dos alunos e a construção de novos conhecimentos. A proposta foi desenvolvida com aproximadamente 25 alunos do 5º ano do Ensino Fundamental, com faixa etária de nove a onze anos, de uma escola pública municipal de uma cidade do interior de São Paulo e sua análise mostra que os resultados foram positivos.Palavras-chave: Plantas medicinais; ensino de Ciências; Ensino Fundamental.
AbstractThe teaching of Science in Elementary Education allows the learning of basic concepts, enabling the development of skills, research and development, ensuring its insertion in scientific research. However, this teaching in the initial years is decontextualized, because it uses a language that is far from the reality of the students, 272 REnCiMa, v. 10, n.5, p. 271-290, 2019
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