ABSTRACT. The aim of this study is the provision of informations regarding the antioxidant molecules content in methanolic extracts of ten fruits through the correlation of total phenolic compounds with antioxidant capacity. The former was determined through the Folin-Ciocalteu assay while the latter was measured by the DPPH radical inhibition method. It was verified that the fruits possess positive correlation (R 2 = 0.6169) of total phenolic compounds in their compositions. Among the analyzed fruits, jambul and acerola showed the greatest values of antioxidant capacity (20.94 and 24.48 g mL -1 ) and total phenolic compounds (635.32 and 675.73 mg gallic acid equivalent/100 g of sample). The results that were obtained in this study are useful for consumers, nutritionists and institutions which formulate food policies.Keywords: free radicals, gallic acid, UV-Vis espectrophotometry.Fenólicos totais e capacidade antioxidante em extratos metanólicos de dez frutas RESUMO. O presente estudo buscou fornecer informações sobre a composição de moléculas antioxidantes em extratos metanólicos de dez frutas por meio da correlação entre a quantidade de fenólicos totais e a capacidade antioxidante. Foram realizados ensaios pelo método de fenólicos totais (FolinCiocalteu) e de capacidade antioxidante pela inibição do radical DPPH . Verificou-se que as frutas possuem variação de antioxidante e correlação positiva (R 2 = 0,6169) de fenólicos totais em sua composição. Dentre as frutas analisadas, o jambolão e acerola são as que possuem maior capacidade antioxidante: 20,94 e 24,48 (g mL -1 ) e fenólicos totais 635,32 e 675,73 mg equivalente de ácido gálico/100 g de amostra respectivamente. Este estudo forneceu novas informações sobre a composição de antioxidantes em frutas para consumidores, nutricionistas e instituições formuladoras de políticas alimentares.Palavras-chave: radical livre, ácido gálico, espectrofotometria no UV-Vis.
The aim of this study was to compare fatty acid profiles of seed samples from twenty different soybean (Glycine max (L.) Merrill) genotypes (14 non-transgenic and six transgenic Roundup-tolerant) grown at two different locations, both in the Parana state, a southern region of Brazil. A total of eleven fatty acids were detected and quantified, among them the most expressive ones were oleic, linoleic, linolenic and palmitic acids. The total unsaturated fatty acid amount was higher than 82%. An increase in the n-3 fatty acids quantities were observed in transgenic species, which can be reflected in lower n-6/n-3 ratios, a highly desired trend regarding consumers' health. In conclusion, results showed a large amount of variation among the different germplasms (either conventional or transgenic) within and across locations.
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