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|Type:||Artigo de periódico|
|Title:||Identification Of Bioactive Compounds From Jambolão (syzygium Cumini) And Antioxidant Capacity Evaluation In Different Ph Conditions|
|Abstract:||The composition of carotenoids and phenolic compounds from jambolão fruits (Syzygium cumini) was determined by HPLC-DAD-MS/MS. Two main carotenoids were found in the fruits, all-trans-lutein (43.7%) and all-trans-β-carotene (25.4%). The anthocyanin composition was characterised by the presence of 3,5-diglucosides of five out of six aglycones commonly found in foods. This pattern was also observed for the other flavonoids, since diglucosides of dihydromyricetin, methyl-dihydromyricetin and dimethyl-dihydromyricetin, along with myricetin glucoside and a galloyl-glucose ester were identified. Furthermore, the antioxidant capacity of a functional extract rich in anthocyanins was evaluated through the scavenging capacities of ABTS + and peroxyl radical (ORAC) and the protective effect against singlet oxygen ( 1O 2). The TEAC values indicated that the hemiacetals/chalcones and quinonoidal bases species (pH ≥ 5) possess higher scavenging capacity as compared to the flavylium cation (pH < 3). The functional extract also showed 60% of dimethylanthracene protection against 1O 2 and an ORAC value of 16.4 μmol Trolox/g fruit. © 2010 Elsevier Ltd. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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