IQ - Artigos publicados em periódicos
URI Permanente para esta coleção
Navegar
Navegando IQ - Artigos publicados em periódicos por Autor "Abreu, Paulo Cesar Oliveira Vergne de"
Agora exibindo 1 - 1 de 1
Resultados por página
Opções de Ordenação
Item Lipid content and fatty acid profile of Nannochloropsis oculata before and after extraction with conventional solvents and/or compressed fluids(2016) Silva, Francis Josiane Liana Baumgardt da; Zandoná Filho, Arion; Brandalize, Marcus Vinícius; Costa, Dayane Cristina da; Antoniosi Filho, Nelson Roberto; Abreu, Paulo Cesar Oliveira Vergne de; Corazza, Marcos Lúcio; Ramos, Luiz PereiraThe lipid content and fatty acid profile of freshly harvested Nannochloropsis oculata was characterized before and after extraction with both conventional solvents and compressed fluids. Among the conventional solvents, ethanol was the most efficient, yielding 11.33 g of fatty acids methyl esters per 100 g−1 of dry microalga biomass. The addition of ethanol as co-solvent at a mass ratio of 1:1 improved the extraction performance of both subcritical propane and supercritical CO2. At 200 bar and 80 °C, the extraction of N. oculata with propane in the presence of ethanol resulted in the best yield of 7.53 g of fatty acid methyl esters per 100 g of the desalted biomass. By replacing propane by carbon dioxide, this yield dropped 45.8%. However, under the conditions used in this study, both conventional and compressed fluid extractions did not remove the entirety of the microalga fatty acids, demonstrating that these processes toned to be optimized to avoid mass transfer limitations. Even so, the use of compressed fluids reduced the amount of solvent used when compared to extraction with a conventional Soxhlet apparatus.