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.
J Agric Food Chem. 2012 Mar 28;60(12):3061-7. doi: 10.1021/jf205263f. Epub 2012 Mar 19.
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.
本研究的目的是通过对桃金娘科三种植物（黄番石榴（Psidium cattleyanum Sabine）、巴西莓（Campomanesia xanthocarpa O. Berg）和尤加里（ Eugenia pyriformis Cambess））的理化特性表征和抗氧化潜力测定，评估巴西的生物多样性。巴西莓中的酚类化合物含量（9033mg 绿原酸/100g）和维生素 C（30.58mg/g）最高，TSS/TTA（总可溶性固体/总可滴定酸）比值最佳（45.12）。ABTS（2,2-连氮-双-3-乙基苯并噻唑啉-6-磺酸）法中，巴西莓（507.49μM Trolox/g）的抗氧化能力最强；然而，在 DPPH（2,2-二苯基-1-苦基肼）法中，尤加里（170.26g/g DPPH）和巴西莓（161.29g/g DPPH）之间无统计学差异。尤加里的类胡萝卜素（909.33μg/g）和维生素 A（37.83μg/g）含量较高，在水果中排名较高，而黄番石榴虽然生物活性化合物含量和抗氧化活性较低，但仍高于许多传统食用水果。
