Fenóis totais e atividade antioxidante de cinco plantas medicinais

Sousa, Cleyton Marcos de M.; Silva, Hilris Rocha e; Vieira-Jr., Gerardo Magela; Ayres, Mariane Cruz Costa; Costa, Charllyton Luís Sena da; Araújo, Delton Sérvulo; Cavalcante, Luís Carlos Duarte; Barros, Elcio Daniel Sousa; Araújo, Paulo Breitner de M.; Brandão, Marcela S.; Chaves, Mariana Helena

doi:10.1590/s0100-40422007000200021

Cited by 461 publications

(373 citation statements)

References 16 publications

(35 reference statements)

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“…* %FRS = free-radical scavenging percentage (*antioxidant activity evaluated by the method of DPPH free-radical scavenging, with the final concentration equivalent to 250 µg/mL of extract). According Sousa et al (2007), the phenolic compounds are distributed in the following categories: Simple phenolics, phenolic acids (benzoic and cinnamic acid derivatives), coumarins, flavonoids, hydrolysable and condensed tannins, stilbenes, lignans, and lignins. They have the ability to inhibit lipid peroxidation and lipoxygenase in vitro.…”

Section: Discussionmentioning

confidence: 99%

Contents of constituents and antioxidant activity of seed and pulp extracts of Annona coriacea and Annona sylvatica

et al. 2015

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The antioxidant potential of fruit pulp and seeds of extracts of the Annona coriacea, and A. sylvatica (Annonaceae) were investigated, as well contents total phenolics, flavonoids, condensed tannins and ascorbic acid. Was used to determine the antioxidant activity the 1,1-diphenyl-1-picrylhydrazyl free radical (DPPH), β-carotene bleaching and ABTS radical cation method. The total phenol, total flavonoid, condensed tannin, and ascorbic acid contents were measured spectrophotometrically. In this study, the pulp and seeds of the fruits were extracted using methanol/water (8:2) for maceration. The seed extracts of A. coriacea demonstrated a moderate antioxidant effect with free radical scavenging activity of 31.53%, by the DPPH test, 51.59% by the β-carotene bleaching test and 159.50 µM trolx/g of extract in the ABTS assay. We found that the hydromethanolic seed extract of A. coriacea had high total phenol (147.08 ± 4.20 mg of GAE/g of extract) and flavonoid (131.18 ± 2.31 mg of QE/g of extract) content. This indicated that the antioxidant activity of the extracts was related to the contents of these constituents.Keywords: Annona, antioxidant activity, phytochemistry. Conteúdo

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“…Em estudo realizado por Sousa et al (2007), foi demonstrado que os extratos de plantas medicinais e o ácido gálico, usado para comparação, apresentaram capacidade em sequestrar o radical DPPH, obtendo-se, assim, atividades antioxidantes que variaram de 10 a 91% para os extratos de plantas medicinais, e o ácido gálico obteve 94,84%.…”

Section: Rendimento Dos Extratos De Sementes De Limãounclassified

Potencial antioxidante de extratos de sementes de limão (Citrus limon)

Luzia¹,

Jorge²

2010

Ciênc. Tecnol. Aliment.

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“…Some substances naturally occurring in vegetal extracts are capable of absorbing ultraviolet radiation via chromophoric molecules associated with antioxidant activity (Sousa et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Development of O/W emulsions containing Euterpe oleracea extract and evaluation of photoprotective efficacy

Daher

Fontes

Rodrigues

et al. 2014

Braz. J. Pharm. Sci.

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Euterpe oleracea Mart. is a palm tree popularly known as açai, which is primarily found in northern Brazil. The açai's fruits contain anthocyanins, a class of polyphenols to which antioxidant properties have been attributed. The aim of this work was to develop O/W sunscreens emulsions containing açai glycolic extract (AGE) and to evaluate both their physical stability and photoprotective efficacy. Emulsions containing AGE and sunscreens were formulated using different types and concentrations of polymeric surfactant (acrylates/C 10-30 alkyl acrylate crosspolymer and sodium polyacrylate). The influence of two rheology modifiers (polyacrylamide (and) C13-14/isoparaffin (and) Laureth-7 and Carbomer) on the stability was also investigated. Physical stability was evaluated by preliminary and accelerated studies. Emulsions with 1.0% sodium polyacrylate were stable and exhibited non-newtonian pseudoplastic behavior and thixotropy. Photoprotective efficacy was evaluated by in vivo Sun Protection Factor (SPF) and determination of Protection Factor of UVA (PF-UVA). When AGE was added to the sunscreen emulsion, no significant increase in the in vivo SPF value was observed. The emulsion containing AGE showed PF-UVA = 14.97, 1.69 of the SPF/PF-UVA ratio and a critical wavelength value of 378 nm, and may therefore be considered a sunscreen with UVA and UVB protection. Euterpe oleracea Mart. é uma palmeira popularmente conhecida como açaí, encontrada no norte do Brasil. O fruto do açaí apresenta em sua composição antocianinas, uma classe de polifenóis à qual é atribuída propriedade antioxidante. Os objetivos desse trabalho foram desenvolver emulsões fotoprotetoras O/A contendo extrato glicólico de açaí (AGE), avaliar a estabilidade física e avaliar a eficácia fotoprotetora. Emulsões contendo AGE e filtros solares foram formuladas utilizando diferentes tipos e concentrações de tensoativo polimérico (acrilates/C 10-30 alquil acrilato polímero cruzado e polilacrilato sódico). A influência de dois modificadores reológicos (poliacrilamida (e) C13-14/isoparafina (e) Laureth-7 e Carbomer) na estabilidade foi avaliada. A estabilidade física das emulsões foi avaliada por meio de estudos de estabilidade preliminar e acelerada. Emulsões com 1,0% poliacrilato sódico foram estáveis, exibiram comportamento não-newtoniano pseudoplástico e tixotrópico. A eficácia fotoprotetora foi avaliada pelo teste in vivo de Fator de Proteção Solar (FPS) e pela determinação do Fator de Proteção UVA (FP-UVA). Quando adicionado o AGE na emulsão contendo filtros solares, não se observou aumento significativo no valor do FPS. A emulsão contendo o AGE apresentou FP-UVA=14,97, a razão FPS/ FP-UVA = 1,69 e o comprimento de onda crítico igual a 378 nm, podendo ser considerado um protetor solar com proteção UVA e UVB. Unitermos:Emulsão O/A/desenvolvimento. Euterpe oleracea/farmacognosia. Euterpe oleracea/extrato glicólico/eficácia fotoprotetora. Protetores Solares/desenvolvimento. Fator de Proteção Solar.

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“…Many species of the genus Terminalia have been used for medicinal purposes in Asian countries and to treat infectious diseases in western Africa (OLIVEIRA et al, 2000;SOUSA et al, 2007).…”

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confidence: 99%

“…Currently, several studies show that free radicals and other oxidants play a key role in the development of diseases that are related to premature aging and chronic non-communicable diseases (ATOUI et al, 2005;SOUSA et al, 2007).…”

mentioning

confidence: 99%

An in vitro analysis of the total phenolic content, antioxidant power, physical, physicochemical, and chemical composition of Terminalia Catappa Linn fruits

et al. 2012

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This study assessed the antioxidant, total phenolic, and physicochemical properties of in vitro Terminalia Catappa Linn (locally called castanhola) using the DPPH assay. The castanhola fruits had an average weight of 19.60 ± 0.00 g, combining shell, pulp, and seed weight, and a soluble solids content of 8 °Brix. The chemical composition was determined with predominance of carbohydrates (76,88 ± 0,58%).The titration method was used to determine Vitamin C content using 2,6-dichlorophenolindophenol (DCFI), known as reactive Tillmans resulting in no significant levels. Aqueous extracts of castanhola pulp showed a higher concentration of phenolics, 244.33 ± 18.86 GAE.g-1 of fruit, and alcoholic extracts, 142.84 ± 2.09 GAE.g-1 of fruit. EC50 values of the aqueous extract showed a greater ability to scavenge free radicals than the alcoholic extracts. The fruit had a significant content of phenolic compounds and high antioxidant capacity.

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Fenóis totais e atividade antioxidante de cinco plantas medicinais

Cited by 461 publications

References 16 publications

Contents of constituents and antioxidant activity of seed and pulp extracts of Annona coriacea and Annona sylvatica

Potencial antioxidante de extratos de sementes de limão (Citrus limon)

Development of O/W emulsions containing Euterpe oleracea extract and evaluation of photoprotective efficacy

An in vitro analysis of the total phenolic content, antioxidant power, physical, physicochemical, and chemical composition of Terminalia Catappa Linn fruits

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