Dried camu-camu (Myrciaria dubia H. B. K. McVaugh) industrial residue: a bioactive-rich Amazonian powder with functional attributes

• Autor(a) principal: Azevedo, Juliana Chrís Silva de
• Data de Publicação: 2014
• Outros Autores: Fujita, Alice, Oliveira, Edson Leandro de, Genovese, Maria Inês, Correia, Roberta Targino Pinto
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/45410; https://doi.org/10.1016/j.foodres.2014.05.018
• topic: industrial residue; Amazonia; drying; flavonoids; antimicrobial; antienzymatic

Camu-camu is a tropical Amazonian fruit, extensively processed into fruit pulp and other derivatives. This work investigates the fresh and dried (hot air dried and freeze dried) camu-camu depulping residue in regard to its physicochemical characteristics, bioactive content, in vitro antidiabetic potential and antimicrobial activities. The phenolic content of fresh residue (FR), hot air dried residue at 50 °C (HAD50), hot air dried residue at 80 °C (HAD80) and freeze dried residue (FD) were 3738.0, 1843.6, 1349.4 and 2160.2 mg GAE/100 g DW, respectively. Important flavonoids were identified (quercetin, myricetin, and catechin), besides high amount of ellagic acid (18.9 mg/100 g DW for the fresh residue), and for the first time in literature, the presence of syringic acid (3.1 to 7.0 mg/100 g DW) in the camu-camu residue was shown. The Minimum Inhibitory Concentration against Staphylococcus aureus ranged from 0.3125 to 0.625 mg/mL for freeze dried and hot air dried camu-camu residues. Moderate in vitro alpha-amylase and potent alpha-glucosidase inhibitory activities were also observed for all extracts. This paper presents the dried camu-camu residue as a natural powder with bioactive and functional properties.