title: Characterization and antioxidant potential of Brazilian fruits from the Myrtaceae family.
abstract: The objective of this study is to evaluating the Brazilian biodiversity through physicochemical characterization and determination of antioxidant potential of three species from the Myrtaceae family, namely yellow guava (Psidium cattleyanum Sabine), guabiroba (Campomanesia xanthocarpa O. Berg), and uvaia ( Eugenia pyriformis Cambess). Guabiroba had the greater quantity of phenolic compounds (9033 mg chlorogenic acid/100 g) and vitamin C (30.58 mg/g) and showed the best TSS/TTA (total soluble solid/total titratable acid) ratio (45.12). For the ABTS (2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic) method, the guabiroba (507.49 μM Trolox/g) presented the highest antioxidant potential; however, in the DPPH (2,2-diphenyl-1-picrylhydrazyl) method, uvaia (170.26 g/g DPPH) and guabiroba (161.29 g/g DPPH) were not statistically different. The uvaia outranked the other fruits with respect to its high carotenoid (909.33 μg/g) and vitamin A (37.83 μg/g) contents, and the yellow guava, although showing a lower bioactive compound content and antioxidant activity, nevertheless presented much higher values than many traditionally consumed fruits.
authors.affiliation: Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, 9500, Prédio 43.212, Campus do Vale, Porto Alegre, RS, CEP 91501-970, Brazil.
authors.forename: Marina C
authors.initials: MC
authors.lastname: Pereira
authors.forename: Rosana S
authors.initials: RS
authors.lastname: Steffens
authors.forename: André
authors.initials: A
authors.lastname: Jablonski
authors.forename: Plinho F
authors.initials: PF
authors.lastname: Hertz
authors.forename: Alessandro de O
authors.initials: Ade O
authors.lastname: Rios
authors.forename: Márcia
authors.initials: M
authors.lastname: Vizzotto
authors.forename: Simone H
authors.initials: SH
authors.lastname: Flôres
mesh_terms: D000975:Antioxidants / Q000032:analysis* / Q000494:pharmacology; D001205:Ascorbic Acid / Q000032:analysis; D001938:Brazil; D002338:Carotenoids / Q000032:analysis; D055598:Chemical Phenomena; D002726:Chlorogenic Acid / Q000032:analysis; D005638:Fruit / Q000737:chemistry*; D027822:Myrtaceae / Q000737:chemistry*; D014801:Vitamin A / Q000032:analysis
chemical_list: D000975:Antioxidants; D014801:Vitamin A; D002726:Chlorogenic Acid; D002338:Carotenoids; D001205:Ascorbic Acid