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Tropical Isabella Grape Juices： Bioactive Compounds and Antioxidant Power Depends on Harvest Season

Journal of Food Science and Engineering 2013年第2期3卷 64-70页

作者： Cinthia Bau Betim Cazarin Luiz Claudio Correa Juliana Kelly da Silva Angela Giovana Batista Cibele Priscila Busch Furlan Aline Camarao Telles Biasoto Giuliano Elias Pereira Ana Cecilia Poloni Rybka Mairio Roberto Marostica Junior Department of Food and Nutrition University of Campinas Campinas Sao Paulo 13083-862 Brazil Brazilian Agricultural Research Corporation Embrapa Tropical Semi-arid Petrolina Pernambuco 56302-970 Brazil Brazilian Agricultural Research Corporation Embrapa Grape & Wine/Tropical Semi-arid Petrolina Pernambuco 56302-970Brazil

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 mL1- 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.

关键词： Isabella grape vitis labrusca grape juice antioxidant activity anthocyanins phenolic content.

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Purple Grape Juice,an Important Flavonoids Source,Influence in Biochemical Parameters in Offspring of Wistar Rats

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Food and Nutrition Sciences 2015年第7期6卷 683-691页

作者： Daniele Karina Hilger Mariane Farias Wohlenberg Thays Krischke Schaffer Fernanda de Souza Machado Luciana Kneib Goncalves Gabrielli Bortolato Gabriele Dani Adriana Rodrigues Cláudia Funchal Caroline Dani Centro Universitário Metodista-IPA Porto AlegreBrasil Georgetown University Washington DCUSA Faculdade da Serra Gaúcha Caxias do SulBrasil

Our objective was to evaluate the effect of chronic gestational treatment and post-breast feeding with purple grape juice on the biochemical parameters in offspring of dams. We used 40 male offspring from 14 Wistar rats which received purple grape juice or water by gavage daily for 42 days at a dose of 7 microliters/g. The offspring were divided into groups of water or juice. All received daily purple grape juice or water by gavage for 30 days after completion of their nursing period at a dose of 7 microliters/g. At the end of the treatment period, the offspring were euthanized by decapitation with its truncal blood collected and subsequently separated the serum from the blood. The measurements were performed by automation or by manual dosing. Considering the gestational factor, grape juice was able to reduce levels of total cholesterol, triglycerides, urea, alanine aminotransferase (ALT), and not alter the levels of creatinine and aspartate aminotransferase (AST) in serum of the offspring. When considering the post-breast feeding factor, grape juice resulted in an improvement in HDL-C. We concluded that purple grape juice was able to produce a beneficial effect on certain biochemical parameters in offspring.

关键词： vitis labrusca Biochemical Profile Pregnancy Grape Juice

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