RESUMO
HIGHLIGHTS Production of lipid nanoemulsions (<100 nm) of industrial interest with low energy demand. The antioxidant properties of babassu oil have been improved and the nanoemulsions are not cytotoxic. Babassu oil is a food and medicinal product. The nanoemulsion is strategic for the developed of new antioxidants phytotherapeutics.
Abstract Background: Babassu oil is an extract from a Brazilian native coconut (Orbignya phalerata Martius) and is used both as a food and a medicinal product. Methods: we produced two babassu oil nanoemulsions and evaluated them regarding their nanoscopic stability, antioxidant activity and cytotoxicity.The nanoemulsions were characterized by Dynamic Light Scattering, and their stability was investigated for 120 days. The antioxidant activity was assessed by Spectroscopy Electron Paramagnetic Resonance, and the cytotoxicity was assessed by a colorimetric method (MTT) with the NIH/3T3 cell lineage. Results: the results showed nanoemulsions with average hydrodynamic diameter lower than 100 nm (p(0.001).and a polydispersity index of less than 0.3 (p(0.001), indicating monodisperse systems and good stability at room temperature. The exposure of nanoemulsions at varying pH revealed that the isoelectric point was at 3.0, and the images obtained by Transmission Electron Microscopy showed spherical droplets with a size 27 nm. The antioxidant activity showed that the babassu nanoemulsions exposed to free radicals had a better response when compared to the oil free samples. The cell viability assays showed low toxicity of the formulation with viability over 92% (p(0.05). Conclusion: babassu oil nanoformulations showed low polydispersity and kinetic stability with effective antioxidant action. Therefore, they can be promising for application in the food industry or as antioxidant phytotherapeutics.
Assuntos
Óleo de Palmeira/química , Nanotecnologia , Antioxidantes , Extratos Vegetais/química , Indústria Alimentícia , Citotoxinas , Microscopia Eletrônica de Transmissão , Emulsões , NanocompostosRESUMO
O objetivo desta pesquisa foi analisar a concepção da dança como conteúdo da educação física escolar, expressa nos artigos publica - dos na Revista Brasileira de Ciências do Esporte (RBCE). Trata-se de pes- quisa bibliográfica em que foram analisados 10 artigos. Encontramos em maior abundância as concepções da dança como linguagem, linguagem simbólica ou forma de comunicação e maior incidência do referencial fenomenológico. Apontamos a necessidade de aprofundamentos sobre o tipo de sujeito que se quer formar a partir das concepções citadas. Por fim, fazemos a defesa do ensino da dança na escola a partir da concep - ção de formação omnilateral.
The objective of this research was to analyze the conception of dance as content of school physical education, expressed in the articles published in the Brazilian Journal of Sports Sciences (RBCE). It is a bibliographical research in which 10 articles were analyzed. We show in greater abundance the conceptions of dance as language, symbolic language or form of communication, and higher incidence of the phenomenological referential. We point out the need for deepening on the type of subject that one wants to form from the conceptions mentioned. Finally, we make the defense of the teaching of dance in the school from the conception of omnilateral formation.
El objetivo de esta investigación fue analizar la concepción de danza como contenido de la educación física escolar, expresa en los artículos publicados en la Revista Brasileña de Ciencias del Deporte (RBCE). Es una investigación bibliográfica en la cual fueron analizados 10 artículos. Evidenciamos en mayor abundancia las concepciones de danza como lenguaje, lenguaje simbólico o manera de comunicación y mayor incidencia del referencial fenomenológico. Aponemos la necesidad de profundizaciones sobre el tipo de sujeto que se quiere formar a partir de las concepciones citadas. Por último, hacemos la defensa de la enseñanza de la danza en la escuela a partir de la concepción de la formación omnilateral.