Capacidade antioxidante de hortaliças usualmente consumidas
Como objetivo de avaliar a capacidade antioxidante de 15 hortaliças comercializadas na Cidade do Recife, extratos metanólicos foram testados quanto a atividade antioxidante em sistema modelo beta-caroteno/ácido linoléico e a habilidade de seqüestrar o radical estável 1,1-difenil-2-picrilhidrazil (DP...
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Published in | Ciência e tecnologia de alimentos Vol. 26; no. 3; pp. 639 - 644 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | Portuguese |
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Sociedade Brasileira de Ciência e Tecnologia de Alimentos
2006
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Abstract | Como objetivo de avaliar a capacidade antioxidante de 15 hortaliças comercializadas na Cidade do Recife, extratos metanólicos foram testados quanto a atividade antioxidante em sistema modelo beta-caroteno/ácido linoléico e a habilidade de seqüestrar o radical estável 1,1-difenil-2-picrilhidrazil (DPPH). Todas as hortaliças investigadas exibiram propriedade antioxidante, entretanto a ação foi diferenciada entre os vegetais. Os extratos metanólicos da couve folha, tomate, batata, couve-flor, repolho verde, espinafre e alface crespa, com percentual de inibição superior a 70%, foram os mais eficazes em seqüestrar o radical livre. Os extratos metanólicos da alface lisa, cebola branca e vagem apresentaram ação moderada (60-70% de inibição), enquanto que a cebola roxa, chuchu, pepino e cenoura exibiram a mais fraca capacidade de seqüestrar o radical DPPH. No sistema modelo beta-caroteno/ácido linoléico, os extratos metanólicos do espinafre e couve-folha exibiram a mais elevada atividade antioxidante (superior a 70%). Ação antioxidante moderada (60-70%) foi exibida pelos extratos da alface lisa, cebola branca e couve-flor, enquanto que os do chuchu, cenoura, pepino, tomate e vagem, com atividade inferior a 60%, foram considerados com fraca ação antioxidante. As hortaliças testadas podem ser vistas como fontes dietéticas de antioxidantes que podem trazer benefícios à saúde, portanto o seu consumo deve ser estimulado.
This study was carried out to determine the antioxidant capacity of 15 vegetables commonly consumed in Recife - PE, Brazil. Methanol extracts were screened for their antioxidant activity using two tests: DPPH free radical scavenging and beta-carotene/linoléico acid assay. All vegetables showed antioxidant properties however the action was differentiated among the kinds of vegetables. The methanol extracts of collard greens, tomatoes, potatoes, cauliflowers, green cabbage, spinach and lettuce "crespa" had the highest percentage in terms of free radical scavenging activities (> 70%). A moderate activity (60-70%) was shown by lettuce "lisa", white onion and green beans while purple onion, chayote, cucumber and carrot had the lowest free radical scavenging activities. In the beta-carotene/linoleic acid assay, spinach and collard greens extracts showed strong antioxidant activity (> 70%). The lettuce "lisa", white onion and cauliflower had a moderate action (60-70%) while the chayote, carrot, cucumber, tomato and green bean showed weak antioxidant activity. The results indicate that vegetables which were evaluated may provide a source of dietary antioxidant therefore their consumption must be encouraged. |
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AbstractList | Como objetivo de avaliar a capacidade antioxidante de 15 hortaliças comercializadas na Cidade do Recife, extratos metanólicos foram testados quanto a atividade antioxidante em sistema modelo beta-caroteno/ácido linoléico e a habilidade de seqüestrar o radical estável 1,1-difenil-2-picrilhidrazil (DPPH). Todas as hortaliças investigadas exibiram propriedade antioxidante, entretanto a ação foi diferenciada entre os vegetais. Os extratos metanólicos da couve folha, tomate, batata, couve-flor, repolho verde, espinafre e alface crespa, com percentual de inibição superior a 70%, foram os mais eficazes em seqüestrar o radical livre. Os extratos metanólicos da alface lisa, cebola branca e vagem apresentaram ação moderada (60-70% de inibição), enquanto que a cebola roxa, chuchu, pepino e cenoura exibiram a mais fraca capacidade de seqüestrar o radical DPPH. No sistema modelo beta-caroteno/ácido linoléico, os extratos metanólicos do espinafre e couve-folha exibiram a mais elevada atividade antioxidante (superior a 70%). Ação antioxidante moderada (60-70%) foi exibida pelos extratos da alface lisa, cebola branca e couve-flor, enquanto que os do chuchu, cenoura, pepino, tomate e vagem, com atividade inferior a 60%, foram considerados com fraca ação antioxidante. As hortaliças testadas podem ser vistas como fontes dietéticas de antioxidantes que podem trazer benefícios à saúde, portanto o seu consumo deve ser estimulado.
This study was carried out to determine the antioxidant capacity of 15 vegetables commonly consumed in Recife - PE, Brazil. Methanol extracts were screened for their antioxidant activity using two tests: DPPH free radical scavenging and beta-carotene/linoléico acid assay. All vegetables showed antioxidant properties however the action was differentiated among the kinds of vegetables. The methanol extracts of collard greens, tomatoes, potatoes, cauliflowers, green cabbage, spinach and lettuce "crespa" had the highest percentage in terms of free radical scavenging activities (> 70%). A moderate activity (60-70%) was shown by lettuce "lisa", white onion and green beans while purple onion, chayote, cucumber and carrot had the lowest free radical scavenging activities. In the beta-carotene/linoleic acid assay, spinach and collard greens extracts showed strong antioxidant activity (> 70%). The lettuce "lisa", white onion and cauliflower had a moderate action (60-70%) while the chayote, carrot, cucumber, tomato and green bean showed weak antioxidant activity. The results indicate that vegetables which were evaluated may provide a source of dietary antioxidant therefore their consumption must be encouraged. Como objetivo de avaliar a capacidade antioxidante de 15 hortaliças comercializadas na Cidade do Recife, extratos metanólicos foram testados quanto a atividade antioxidante em sistema modelo beta-caroteno/ácido linoléico e a habilidade de seqüestrar o radical estável 1,1-difenil-2-picrilhidrazil (DPPH). Todas as hortaliças investigadas exibiram propriedade antioxidante, entretanto a ação foi diferenciada entre os vegetais. Os extratos metanólicos da couve folha, tomate, batata, couve-flor, repolho verde, espinafre e alface crespa, com percentual de inibição superior a 70%, foram os mais eficazes em seqüestrar o radical livre. Os extratos metanólicos da alface lisa, cebola branca e vagem apresentaram ação moderada (60-70% de inibição), enquanto que a cebola roxa, chuchu, pepino e cenoura exibiram a mais fraca capacidade de seqüestrar o radical DPPH. No sistema modelo beta-caroteno/ácido linoléico, os extratos metanólicos do espinafre e couve-folha exibiram a mais elevada atividade antioxidante (superior a 70%). Ação antioxidante moderada (60-70%) foi exibida pelos extratos da alface lisa, cebola branca e couve-flor, enquanto que os do chuchu, cenoura, pepino, tomate e vagem, com atividade inferior a 60%, foram considerados com fraca ação antioxidante. As hortaliças testadas podem ser vistas como fontes dietéticas de antioxidantes que podem trazer benefícios à saúde, portanto o seu consumo deve ser estimulado. |
Author | Melo, Enayde de Almeida(Universidade Federal Rural de Pernambuco DCD) Maciel, Maria Inês Sucupira(Universidade Federal Rural de Pernambuco DCD) Lima, Vera Lúcia Arroxelas Galvão(Universidade Federal Rural de Pernambuco DCD) Leal, Fernanda Lídia Lemos(UFRPE) Caetano, Ana Carla da Silva Nascimento, Rosilda Josefa(UFRPE) |
AuthorAffiliation | Universidade Federal Rural de Pernambuco |
AuthorAffiliation_xml | – name: Universidade Federal Rural de Pernambuco |
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Keywords | hortaliças DPPH antioxidant action ação antioxidante vegetables beta-carotene/linoleic acid model system sistema modelo beta-caroteno/ácido linoléico |
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Snippet | Como objetivo de avaliar a capacidade antioxidante de 15 hortaliças comercializadas na Cidade do Recife, extratos metanólicos foram testados quanto a atividade... |
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SubjectTerms | antioxidant action ação antioxidante beta-carotene/linoleic acid model system DPPH FOOD SCIENCE & TECHNOLOGY hortaliças sistema modelo beta-caroteno/ácido linoléico vegetables |
Title | Capacidade antioxidante de hortaliças usualmente consumidas |
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