title: Effect of acoustically assisted treatments on vitamins, antioxidant activity, organic acids and drying kinetics of pineapple.
abstract: The effects of the application of an acoustically assisted treatment on the vitamins (C, B1, B2, B3, and B5), the antioxidant activity (DPPH, FRAP), the polyphenol and flavonoid contents, the organic acid contents (citric and malic) and drying kinetics of pineapple (Ananas comosus var. Perola) have been studied. Treatments were carried out using two different soaking media: distilled water and pineapple juice at 30°C during 10, 20 and 30min without and with acoustic assistance (23.2W/L). After treatment, samples were dried at 60°C and 0.5m/s during 8h. The quality parameters were determined in untreated, treated, and treated-dried samples. The acoustic assistance promoted an increment of vitamins B1, B2, B3and B5, total flavonoid and malic acid contents, and a reduction of vitamin C, total polyphenol content, antioxidant activity and citric acid content in treated samples. However, in all treated-dried samples the final content of those quality parameters was higher than the observed in the untreated dried sample.
authors.affiliation: Universidade Federal do Ceara, Departamento de Engenharia Química, Campus do Pici, Bloco 709, 60455-760 Fortaleza, CE, Brazil. Electronic address: oscar.rodriguez@uib.es.
authors.forename: Óscar
authors.initials: Ó
authors.lastname: Rodríguez
authors.affiliation: Universidade Federal do Ceara, Departamento de Tecnologia dos Alimentos, Campus do Pici, Bloco 858, 60455-760 Fortaleza, CE, Brazil.
authors.forename: Wesley
authors.initials: W
authors.lastname: Gomes
authors.affiliation: Universidade Federal do Ceara, Departamento de Tecnologia dos Alimentos, Campus do Pici, Bloco 858, 60455-760 Fortaleza, CE, Brazil.
authors.forename: Sueli
authors.initials: S
authors.lastname: Rodrigues
authors.affiliation: Universidade Federal do Ceara, Departamento de Engenharia Química, Campus do Pici, Bloco 709, 60455-760 Fortaleza, CE, Brazil.
authors.forename: Fabiano A N
authors.initials: FAN
authors.lastname: Fernandes
mesh_terms: D000162:Acoustics; D031230:Ananas / Q000737:chemistry*; D000975:Antioxidants / Q000032:analysis* / Q000737:chemistry; D019343:Citric Acid / Q000032:analysis*; D003890:Desiccation / Q000379:methods*; D004058:Diffusion; D005419:Flavonoids / Q000032:analysis; D007700:Kinetics; D008293:Malates / Q000032:analysis*; D059808:Polyphenols / Q000032:analysis; D014815:Vitamins / Q000032:analysis*
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D008293:Malates; D059808:Polyphenols; D014815:Vitamins; D019343:Citric Acid; C030298:malic acid
keywords: Acoustics; Antioxidant activity; Drying kinetics; Organic acids; Pineapple; Vitamin C; Vitamins B