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Master's Dissertation
DOI
https://doi.org/10.11606/D.9.2008.tde-28012009-161811
Document
Author
Full name
Any Elisa de Souza Schmidt Gonçalves
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2008
Supervisor
Committee
Genovese, Maria Inês (President)
Gamboa, Ian Castro
Gioielli, Luiz Antonio
Title in Portuguese
Avaliação da capacidade antioxidante de frutas e polpas de frutas nativas e determinação dos teores de flavonóides e vitamina C
Keywords in Portuguese
Antioxidantes
Capacidade antioxidante
Flavonóides
Frutas
Frutas nativas
Frutas tropicais
Vitamina C
Abstract in Portuguese
Os alimentos fornecem não somente nutrientes essenciais necessários para a vida, mas também compostos bioativos com propriedades biológicas ditas promotoras da saúde, tais como atividades antioxidante, antiinflamatória e anticarcinogênica de nutrientes como as vitaminas C, A e E, e de compostos fenólicos como os flavonóides. De maneira geral, a capacidade antioxidante de frutos e hortaliças está relacionada aos teores destes compostos, que impedem a ação dos radicais livres e são o foco de interesse deste trabalho. Desta forma, o objetivo deste trabalho foi identificar fontes potenciais de compostos bioativos através da determinação dos teores de flavonóides, ácido elágico, vitamina C, capacidade antioxidante e inibição de α-glicosidase e α-amilase de frutas e polpas de frutas nativas. Foram analisadas 16 frutas e 6 polpas congeladas de frutas nativas, e destas, camu-camu, cupuaçu, coquinho azedo e cagaita mostraram-se excelentes fontes de vitamina C. Camu-camu, cambuci, uxi e tucumã e as polpas de cambuci, cagaita, coquinho azedo e araçá foram as amostras que apresentaram melhor capacidade antioxidante. Os flavonóides de maior incidência entre as amostras foram quercetina e caempferol. O ácido elágico foi detectado apenas em umbu, camu-camu, cagaita, araçá e cambuci e o teor variou de 218 a 512 mg/100 g de amostra seca. Cambuci e cagaita foram as amostras mais eficientes em inibir α-glicosidase e α-amilase. Em suma, este trabalho mostrou que as frutas nativas brasileiras também podem ser consideradas boas fontes de compostos bioativos.
Title in English
Antioxidant capacity evaluation of native fruits and commercial frozen pulps and determination of flavonoids and vitamin C content.
Keywords in English
Antioxidant
Antioxidant capacity
Flavonoids
Fruits
Native fruits
Vtamin C
Abstract in English
Foods provide not only essential nutrients for life, but also bioactive compounds with health-promoting properties such as antioxidant, anti-inflammatory and hypocholesterolemic activities, which have been related with vitamins A, C and E and phenolics compounds such as flavonoids. In general, antioxidant capacity of fruits and vegetables is linked to the amount of these compounds, which are effective against free radicals. Therefore, the aim of this work was to identify potential sources of bioactive compounds through determination of flavonoids, ellagic acid and vitamin C contents, antioxidant capacity and α-lucosidase and α-amylase inhibition by native fruits and commercial frozen pulps. In this study, 16 native fruits and 6 commercial frozen pulps were analyzed, and camu-camu, cupuaçu, coquinho azedo and cagaita showed themselves as excellent vitamin C sources. Camu-camu, cambuci, uxi and tucumã and commercial frozen pulps of cambuci, cagaita, coquinho azedo and araçá were the samples that presented the highest antioxidant capacity. Quercetin and kaempferol derivatives were the main flavonoids present in most of the samples. Ellagic acid was detected only in umbu, camu-camu, cagaita, araçá and cambuci and the content ranged from 218 to 512 mg/100 g (DW). Cambuci and cagaita showed the highest α-glucosidase and α-amylase inhibitory activity. According to our results, native Brazilian fruits can also be considered as good sources of bioactive compounds.
 
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dissertacao.pdf (645.19 Kbytes)
Publishing Date
2009-02-12
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • DE SOUZA SCHMIDT GONÇALVES, Any Elisa, LAJOLO, Franco Maria, and GENOVESE, Maria Inés. Chemical Composition and Antioxidant/Antidiabetic Potential of Brazilian Native Fruits and Commercial Frozen Pulps [doi:10.1021/jf903875u]. Journal of Agricultural and Food Chemistry [online], 2010, vol. 58, n. 8, p. 4666-4674.
  • GENOVESE, M.I., et al. Bioactive Compounds and Antioxidant Capacity of Exotic Fruits and Commercial Frozen Pulps from Brazil [doi:10.1177/1082013208092151]. Food Science and Technology International [online], 2008, vol. 14, n. 3, p. 207-214.
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