Evaluation of the residues from the ethanolic extraction of organic propolis as a source of biological compounds

• Autor(a) principal: Ikeda, Natália Yumi
• Data de Publicação: 2020
• Tipo de documento: Tese
• Idioma: eng
• Título da fonte: Biblioteca Digital de Teses e Dissertações da USP
• Texto Completo: http://www.teses.usp.br/teses/disponiveis/11/11141/tde-04062020-084904/
• topic: E. coli; E. coli; Lactobacillus; Lactobacillus; Ácidos fenólicos; Essential oil; Óleo essencial; Phenolic acids; Propolis residue; Resíduo

Ethanolic extract of propolis (EEP) is one of the most effective ways to extract the active compounds of propolis resin. However, EEP\'s processing chain generates a great amount of residues. This residue is composed of several substances such as wax, resins and gums, and also could still contains some bioactive compounds. However, it cannot be reused for human consumption, but it could be applied in animal feed. This study investigated two different forms to use the residues from ethanolic extraction of organic propolis, the extraction of essential oils (EOs) and phenolic acids fractions. EOs were extracted through hydrodistillation and phenolic acids fractions were obtained through solvent extractions and alkaline/acid hydrolysis methods. Both compounds were evaluated for total phenolic content, antioxidant capacity in terms of ABTS, DPPH and FRAP, and antibacterial activity against a pathogenic (Escherichia coli) and a beneficial (Lactobacillus plantarum) bacterium model. All parameters were compared with ethanolic extract of propolis (EEP). This study aimed to investigate propolis residues as a source of biological compounds that could be added in animal feed as an alternative to synthetic antimicrobials.