Antioxidant properties of hydroxy-flavones

Cotelle, Nicole; Bernier, Jacques; Catteau, Jean‐Pierre; Pommery, Jean; Wallet, Jean‐Claude; Gaydou, Émile M.

doi:10.1016/0891-5849(95)02014-4

Cited by 624 publications

(278 citation statements)

References 12 publications

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“…Another important matter is that ABTS + can be dissolved in aqueous and organic media, in which the antioxidant activity can be measured, due to the hydrophilic and lipophilic nature of the compounds, those existed in the plant cells. In contrast, DPPH has been used extensively as a free radical to evaluate reducing substances (Cotelle et al 1996) and is a useful reagent for investigating the free radical scavenging activities of polyphenol compounds (Duan et al 2006). Many researchers have reported positive correlation between free radical scavenging activity.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Antioxidants and ROS scavenging ability in ten Darjeeling tea clones may serve as markers for selection of potentially adapted clones against abiotic stress

Dasgupta

Biswas

Kumar

et al. 2013

Physiol Mol Biol Plants

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Ten Darjeeling tea clones (BT15/263, RR17/144, B777, T253, B157, Sundaram, HV39, AV2, K1/1 and TTV1) were collected from the experimental garden of Darjeeling Tea Research and Development Centre, Kurseong. Total phenol, flavonoids and two antioxidating enzymes (peroxidase and superoxide dismutase) were estimated. The total phenol ranged between 241 and 28 GAE mg g −1 of leaf dry weight. The highest amount obtained in four clones, B15/263 (241.47), RR17/144 (221.2), B777 (154.54) and B157 (140.23 mg g −1 ). Flavonoids were estimated as Catechin equivalent (CE) and ranged between 56.88 and 20.81 CE mg g −1 leaf dry weight. Higher amounts occurred in BT15/263 (56.88 mg g −1 ), B777 (56.69) and RR17/144 (48.63). Antioxidant activities were measured following DPPH and ABTS free radicle scavenging procedures and the results were well according to total polyphenol content among the clones (in total phenols, ranges of correlation in DPPH assay were r 2 =0.990-0.989, p≤0.05; in flavonoids r 2 =0.954, p≤0.01-0.987, p≤0.05). Similarly, ABTS percent scavenging results were quiet significant. The IC 50 values were determined for both DPPH and ABTS assay. PAGE expressions of isoforms in two antioxidative enzymes and quantification of them also varied much among the investigated clones. The incidence of total phenols, flavonoids, PRX and SOD and ROS scavenging assay in in-situ condition, might be used as biochemical markers towards the superior adaptability against abiotic stress. In the present work, four clones (B15/263, B777, RR17/144 and B157) would be designated as comparatively better suited to the predicted abiotic stress.

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Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Antioxidants and ROS scavenging ability in ten Darjeeling tea clones may serve as markers for selection of potentially adapted clones against abiotic stress

Dasgupta

Biswas

Kumar

et al. 2013

Physiol Mol Biol Plants

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“…It's known that antiradical activity of phenolic compounds depends on their molecular structure which is related to availability of phenolic hydrogens and the possibility of stabilization of the resulting phenoxyl radicals formed by hydrogen donation (Pannala et al, 2001). Ferulic acid, due to its phenolic nucleus and an extended side chain conjugation, quickly forms a resonance stabilized phenox radical which accounts for its potent antioxidant potencial, but ferulic acid can not form a metal chelate (Cotelle et al, 1996). The esterification of the carboxyl group seems to affect the antiradical activity of phenolic acids in a different way.…”

Section: Phytochemistry Of Ananas Bracteatusmentioning

confidence: 99%

“…The authors suggest that when the carboxyl group of coplanar conformation compounds was esterified, the rotation of the phenyl moiety may have been restrained, leading to conformational modification that enhances antiradical activity. Ferulic acid derivatives are expected to be more effective than p-coumaric acid derivates because the electron-donating methoxy group allows increased stabilization of the resulting aryloxyl radical through electron delocalization after hydrogen donation by the hydroxyl group (Cotelle et al, 1996).…”

Section: Phytochemistry Of Ananas Bracteatusmentioning

confidence: 99%

“…Several flavonoid compounds (Lewis & Mabrry, 1972;Williams, 1978;Williams & Harbone, 1988;Yano, 1998Yano, ,2003, anthocyanins (Saito & Harbone, 1983;Scogin, 1985), esters of arylpropanoid acid derivatives (Sutherland & Gortner, 1959;Takata & Scheuer, 1976;Rocha, 1999) have been related to Bromeliaceae species. These types of compounds are known as possessing antioxidant and antiradical activities (Graf, 1992;Cotelle et al, 1996;Rice-Evans et al, 1996, Pietta, 2000Silva et al, 2000). Antioxidant compounds protect the biological system against the potentially harmful effect of processes or reactions that cause excessive oxidation, involving reactive oxygen (and nitrogen) species (RONS).…”

Section: Introductionmentioning

confidence: 99%

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Brazilian Bromeliaceae species: isolation of arylpropanoid acid derivatives and antiradical potential

Rocha¹,

Yano²,

Cunha³

et al. 2010

Rev. bras. farmacogn.

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RESUMO: "Espécies de Bromeliaceae brasileiras: isolamento de derivados arilpropanoídicos e potencial antiradicalar". Um total de vinte extratos de seis espécies de Bromeliaceae brasileiras foram avaliadas quanto a atividade antioxidante, usando-se o método colorimétrico de redução do radical DPPH. De maneira geral, os extratos polares dos rizomas das espécies de Bromeliaceae testadas revelaram melhor perfil antioxidante do que os extratos das folhas e dos frutos das mesmas espécies. Os melhores resultados foram encontrados para os rizomas de Vriesea procera (Mart. ex Schult.f.) Wittm. e Neoregelia cruenta (Graham) L.B. Sm. O extrato bruto metanólico das folhas de Ananas bracteatus (Lindl.) Schult. & Schult. f. apresentou uma atividade significativa, em relação aos extratos de folhas testados, e o processo de purificação desse extrato resultou na identificação de quatro metabólitos: ferulato de 2-glicerila, p-cumarato de 2-glicerila, 5,7,4'-triidroxi-3,3',5'-trimetoxiflavona e 3-O-β-D-glicopiranosil sitosterol.Unitermos: Bromeliaceae, antioxidante, ferulato de 2-glicerila, p-cumarato de 2-glicerila, 5,7,4'-triidroxi-3,3',5'-trimetoxiflavona. ABSTRACT:A total of twenty different extracts from six Brazilian Bromeliaceae species was screened for antioxidant activity by assessment of their capacity to scavenge the DPPH radical. In a general way, the polar rhizome extracts from Bromeliaceae representatives showed better antioxidant results than the extracts from leaves and fruits of the same species. The best results were found for the rhizome extracts of Vriesea procera (Mart. ex Schult.f.) Wittm. and Neoregelia cruenta (Graham) L.B. Sm. Crude methanol extract of Ananas bracteatus (Lindl.) Schult. & Schult. f. leaf had a significant antiradical activity among the leaves extracts assessed its purification afforded four metabolites: 2-O-feruloyl glyceride, 2-O-p-coumaroyl glyceride, 5,7,4'-trihydroxy-3,3',5'-trimethoxyflavone and 3-O-β-D-glucopyranosyl sitosterol.

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“…The antioxidant capacity (AC) or activity of the extract was measured by DPPH + (2,2-diphenyl-1-picrylhydrazyl), according to the method of Cottele et al (1996). Results were expressed in µg of ascorbic acid equivalent per mL (AAE µg/mL).…”

Section: Determination Of Antioxidant Capacitymentioning

confidence: 99%

Effect of osmotic dehydration on the physical and chemical properties of Mexican ginger (Zingiber officinalevar. Grand Cayman)

García-Toledo

Ruiz-López

Martínez‐Sánchez

et al. 2015

CyTA - Journal of Food

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The aim of this study was to evaluate the effect of osmotic dehydration of ginger on the properties of color, total polyphenol content (TPC) and antioxidant capacity (AC). Fresh samples were pretreated with scalding (100°C/1.0 minute). Water loss (WL) and solid gain (SG) kinetics were performed using three sucrose concentrations: 35%, 50% and 65% at three temperatures: 40°C, 55°C and 70°C. WL and SG simulated kinetics by Diffusion model for cubes averaged a R 2 of 0.95. The diffusivities for water and solid by Fick's Law obtained maximum values of 6.81 × 10 −7 and 2.65 × 10 −7 m 2 /s, respectively. WL results were obtained up to 60.83% and SG 32.24%. Ginger treatments without blanching (GWB) at 40°C with 35% and 50% sucrose, respectively, showed a similar fresh ginger color. The GWB treatments showed the higher TPC using 50% sucrose at 40°C (753 μg GAE/mL) and AC (341.96 mg AAE/mL).Keywords: osmotic dehydration; total polyphenol content; water loss; Zingiber officinale var. Grand Cayman El objetivo de este estudio fue evaluar el efecto de la deshidratación osmótica de jengibre sobre las propiedades del color, contenido de polifenoles totales (CPT) y la capacidad antioxidante (CA). Las muestras frescas fueron pretratadas con escaldado (100°C/1.0 minuto). Las cinéticas de pérdida de agua (PA) y ganancia de solidos (GS) se realizaron con tres concentraciones de sacarosa: 35, 50 y 65% a tres temperaturas: 40, 55 y 70°C. Las cinéticas de PA y GS simuladas por el modelo de Difusión para cubos promediaron una R 2 de 0,95. Los difusividades de agua y sólidos calculadas por la Ley de Fick obtuvieron valores máximos de 6,81 × 10 −7 y 2,65 × 10 −7 m 2 /s, respectivamente. Los resultados de PA obtuvieron hasta un 60,83% y la GS hasta un 32,24%. Los tratamientos de jengibre sin escaldar (GSE) a 40°C con 35 y 50% de sacarosa respectivamente, mostraron un color similar al jengibre fresco. Los tratamientos GSE mostraron el mayor CPT utilizando 50% de sacarosa a 40°C (753 mg EAG/mL) y CA (341,96 mg EAA/mL).Palabras clave: deshidratación osmótica; contenido de polifenoles totales; pérdida de agua; Zingiber officinale var. Gran Caimán

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Antioxidant properties of hydroxy-flavones

Cited by 624 publications

References 12 publications

RETRACTED ARTICLE: Antioxidants and ROS scavenging ability in ten Darjeeling tea clones may serve as markers for selection of potentially adapted clones against abiotic stress

RETRACTED ARTICLE: Antioxidants and ROS scavenging ability in ten Darjeeling tea clones may serve as markers for selection of potentially adapted clones against abiotic stress

Brazilian Bromeliaceae species: isolation of arylpropanoid acid derivatives and antiradical potential

Effect of osmotic dehydration on the physical and chemical properties of Mexican ginger (Zingiber officinalevar. Grand Cayman)

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