Title:	Tropical Isabella grape juices: bioactive compounds and antioxidant power depends on harvest season.
Authors:	CAZARIN, C. B. B. CORREA, L. C. SILVA, J. K. da BATISTA, A. G. FURLAN, C. P. B. BIASOTO, A. C. T. PEREIRA, G. E. RYBKA, A. C. P. MARÓSTICA JUNIOR, M. R.
Affiliation:	Cinthia Baú Betim Cazarin, UNICAMP; LUIZ CLAUDIO CORREA, CPATSA; Juliana Kelly da Silva, UNICAMP; Angela Giovana Batista, UNICAMP; Cibele Priscila Busch Furlan, UNICAMP; Aline Camarão Telles Biasoto, CPATSA; GIULIANO ELIAS PEREIRA, CNPUV; ANA CECILIA POLONI RYBKA, CPATSA; Mário Roberto Maróstica Junior, UNICAMP.
Date Issued:	2013
Citation:	Journal of Food Science and Engineering, El Monte, v. 3, n. 2, p. 64-70, fev. 2013.
Description:	Grapes are important sources of antioxidants compounds and one of the most used varieties to elaborate juices is 'Isabel', or 'Isabella', as it is called in North-America. This study aimed to evaluate the antioxidant activity of Isabella grape juices from the tropical semi-arid climate produced in Brazil on March and September, 2010. Total phenolics and anthocyanins were determined, as well as the antioxidant capacity by DPPH, FRAP and hydrophilic ORAC methods. Test T was used to compare statistical difference at 5% of significance level. As expected, the results showed that the season can play a significant role on phenolics content and antioxidant power. Polyphenols content in juices varied from 82.9 ± 0.92 to 102.2 ± 1.59 mg GAE 100 mL-1 and anthocyanins content ranged from 44.3 ± 2.01 to 129.5 ± 2.82 mg cyanidin-3-glucoside 100 mL-1. Regression analyses showed a high correlation of antioxidant capacity and anthocyanins content. Grapes from Sao Francisco River Valley demonstrated to be a good source of antioxidant for human diet.
Thesagro:	Viticultura Uva Suco Nutrição Análise química Antocianina Composto Fenólico
Keywords:	Atividade antioxidante Isabel
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPUV)