Rosemary (Rosmarinus officinalis): a study of the composition, antioxidant and antimicrobial activities of extracts obtained with supercritical carbon dioxide Translated title: Alecrim (Rosmarinus officinalis): estudo da composição, atividade antioxidante e antimicrobiana dos extratos obtidos com dióxido de carbono supercrítico

Abstract

Rosemary leaf extracts were obtained by supercritical fluid extraction (SFE) and Soxhlet extraction. Their chemical compositions were evaluated by GC-MS. The extracts were analyzed for compounds reported in the literature as showing antimicrobial and antioxidant activities. The rosemary extracts were tested with regard to antioxidant (DPPH radical scavenging and total phenolic content - Folin-Denis reagent), antibacterial (Gram-positive bacteria - Staphylococcus aureus ATCC 25923 and Bacillus cereus ATCC 11778 - and Gram-negative bacteria - Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC 27853) and antifungal (Candida albicans) activities. Antioxidant, antibacterial and antifungal activities of the SFE extracts were confirmed.

Translated abstract

Extratos das partes aéreas de alecrim foram obtidos utilizando fluidos supercríticos (FSC) e extrações Sohxlet. Sua composição foi analisada com GC-MS. Os extratos foram analisados com base nos compostos repostados na literatura como tendo atividade antimicrobiana e antioxidante. Os extratos de alecrim foram testados quanto à atividade antioxidante (radicais DPPH e conteúdo total de fenólicos - reagente Folin-Denis), antibacteriana (bactérias Gram-positivas: Staphylococcus aureus ATCC 25923 e Bacillus cereus ATCC 11778, e bactérias Gram-negativas: Escherichia coli ATCC 25922 e Pseudomonas aeruginosa ATCC 27853) e antifúngica (Candida albicans). As atividades antioxidantes, antibacterianas e antifúngicas dos extratos de FSC foram confirmadas.