Phenolic Antioxidants from the Heartwood of <i>Acacia confusa</i>

Wu, June H.; Tung, Yu Tang; Wang, Sheng-Yang; Shyur, Lie‐Fen; Kuo, Yueh Hsiung; Chang, Shu−Tong

doi:10.1021/jf050550m

Cited by 75 publications

(64 citation statements)

References 32 publications

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“…The TPC were estimated according to the Folin-Ciocalteau method with some modifications for plant extracts (Kujala et al, 2000;Wu et al, 2005). An aliquot of 0.25-mL of the extract methanol solution (2.50 mg.mL -1 ) was mixed with 0.25 mL of Folin-Ciocalteau reagent previously diluted with water 1:1 v/v, 0.50 mL of a saturated sodium carbonate solution, and 4.0 mL of water.…”

Section: Total Phenolic Compounds (Tpc)mentioning

confidence: 99%

Evaluation of beetroot (Beta vulgaris L.) leaves during its developmental stages: a chemical composition study

et al. 2014

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Section: Total Phenolic Compounds (Tpc)mentioning

confidence: 99%

Evaluation of beetroot (Beta vulgaris L.) leaves during its developmental stages: a chemical composition study

et al. 2014

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“…The content of phenolic compounds in CEE, HF, CHLF and EAF was performed based on colorimetric Folin-Ciocalteu method (Kujala et al, 2000;Wu et al, 2005;Meda et al, 2005), with some modifications. Rates of CEE, HF, CHLF and EAF were diluted with distilled water to obtain concentrations of 25 to 100 mg/ml.…”

Section: Total Phenolic Compounds (Tpc)mentioning

confidence: 99%

Determination of antioxidant, radical scavenging activity and total phenolic compounds of Artocarpus heterophyllus (Jackfuit) seeds extracts

Burci¹,

Silva²,

Oliveira³

et al. 2015

J. Med. Plants Res.

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Plants and their parts are a part of life in many brazilian communities, as observed in the jackfruit. The jackfruit seeds are consumed usually as roasted, boiled, steamed, and are eaten as a snack. The present study was carried out to identify the antioxidant, radical scavenging activity and total phenolic compounds of Artocarpus heterophyllus seeds using different screening tests. Total antioxidant activity was determined by ferric thiocyanate method (FTC), which was shortly followed by complexing of fosfomolybdenium method (FSB) determined in sequence with total reductive capability (TRC), hydrogen peroxide scavenging activity (HPS), DPPH free radical scavenging activity, and Total phenolic content (TPC) by Folin-Ciocalteu reagent assay method. The percentage of inhibition linoleic acid peroxidation by CEE (ethanolic extract), HF (hexanic extract), CHLF (chloroform extract) and EAF (ethyl acetate extract) (90.53, 70.23, 68.72 and 92.03%, respectively), in method using prussian blue antioxidant potential for EAF (89,05%) presented antioxidant activity greater than the standard rutin (82.3%). Highest total antioxidant activity was exerted by the ethanolic extract of A. heterophyllus seeds, and lowest by its EAF (188.83%). In evaluating the antioxidant activity by the hidrogen peroxide scavenging activity, it was observed that the CHLF and HF extracts showed scavenging activity above 50% (83.3 and 83.5%, respectively). The EC 50 (free radical scavenger) values of CEE, HF, CHLF and EAF were 76.71, 399.64, 534.83 and 65.51 μg/ml, respectively, and the highest total phenolic content appeared to be present in 125 µg/ml of EAF. The results of all the sources were found to be highly significant. Further investigation for isolation and identification of the phytoconstituents responsible for antioxidant activity is desirable. A. heterophyllus seeds in the regular diets could improve the antioxidant status of human beings.

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“…Merecem destaque as espécies vegetais K. coriaceae (Ca) (IC 50 = 0,72 ± 0,51 μg/mL), K. coriaceae (Fo) (1,34 ± 0,53 μg/mL), H. speciosa (Fo) (1,03 ± 0,52 μg/mL), Q. grandiflora (Fo) (1,31 ± 0,19 μg/mL) e P. rigida (Fo) (1,39 ± 0,53 μg/mL) quando comparadas ao padrão ácido cafêico (1,89 ± 0,52 μg/mL). Estes resultados permitem inferir uma capacidade antioxidante dos extratos mencionados, pois antioxidantes são substâncias que retardam ou previnem a oxidação de lipídios ou outras moléculas ao inibem a iniciação ou a propagação da reação de oxidação em cadeia (Al-Mamary et al, 2002;Moreira et al, 2002;Chanwitheesuk et al, 2005;Wu et al, 2005;, além de prevenirem ou repararem danos ocasionados às células pelas espécies reativas de oxigênio (Chanwitheesuk et al, 2005).…”

Section: Resultsunclassified

Quantificação de metabólitos secundários e avaliação da atividade antimicrobiana e antioxidante de algumas plantas selecionadas do Cerrado de Mato Grosso

Neto

Kaffashi

Luiz

et al. 2015

Rev. bras. plantas med.

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Recebido para publicação em 05/12/2014 Aceito para publicação em 02/06/2015 RESUMO: Extratos etanólicos de Luehea paniculata, Anadenanthera colubrina, Cariniana rubra, Hancornia speciosa, Qualea grandiflora, Kielmeyera coriaceae e Palicourea rigida, coletadas no Cerrado de Mato Grosso foram submetidos à análise fitoquímica preliminar para identificação das principais classes de metabolitos secundários e à quantificação do teor de compostos fenólicos totais, flavonoides e cumarinas. O estudo também descreve a atividade antimicrobiana, antioxidante e a toxicidade preliminar frente a larvas de Artemia salina. Os extratos de C. rubra e Q. grandiflora foram os mais ativos contra as cepas fúngicas de C. neoformans (CIM 3,91 µg/mL), C. krusei (CIM 15,63 µg/mL), C. parapsilosis (CIM 31,25 µg/mL) e C. albicans (CIM 62,5 µg/mL), ambos com os mesmos resultados para estes microrganismos. Em relação às cepas bacterianas a mais sensível foi S. aureus com CIM de 250 µg/mL para todos os extratos testados. Luhea paniculata e Q. grandiflora foram as espécies vegetais mais ativas contra E. coli (CIM 500 e 250 µg/mL, respectivamente) e E. faecalis (CIM 250 e 500 µg/ mL, respectivamente). No teste do DPPH, merece destaque as espécies K. coriaceae (Ca) (IC 50 = 0,72 ± 0,51 μg/mL), K. coriaceae (Fo) (IC 50 = 1,34 ± 0,53 μg/mL), H. speciosa (Fo) (IC 50 = 1,03 ± 0,52 μg/mL), Q. grandiflora (Fo) (IC 50 = 1,31 ± 0,19 μg/mL) e P. rigida (Fo) (IC 50 = 1,39 ± 0,53 μg/mL). Com exceção de L. paniculata (Fo), que apresentou IC 50 de 14,40 ± 0,34 μg/mL e teor de flavonoides de 295,5 mg/g, todas as espécies que tiverem significativa atividade no teste do DPPH, também apresentaram teor de flavonoides semelhante ao padrão, ou seja, H. speciosa (Fo) (280,5 mg/g), Q. grandiflora (Fo) (260,5 mg/g), K. coriaceae (Ca) (250,5 mg/g), K. coriaceae (Fo) (235,5 mg/g). Quanto à determinação de fenóis totais e cumarinas os resultados foram inferiores quando comparados aos padrões. Palavras-chave:Cerrado, antimicrobiana, fenóis totais, flavonoides, DPPH.ABSTRACT: Quantification of secondary metabolites and antimicrobial and antioxidant activities of some medicinal plants from the Cerrado of the Mato Grosso. Ethanol extracts of Luehea paniculata, Anadenanthera colubrina, Cariniana rubra, Hancornia speciosa, Qualea grandiflora, Kielmeyera coriaceae and Palicourea rigida, collected in the Cerrado of Mato Grosso went through preliminary phytochemical analysis in order to identify major classes of secondary metabolites and also to quantify the total content of phenolics, flavonoids and coumarins. The study also describes the antimicrobial and antioxidant activity and the toxicity of the larva of Artemia salina. The C. rubra extracts and the Q. grandiflora were the most active against fungal strains of C. neoformans (MIC 3.91 µg/ml), C. krusei (MIC 15.63 µg/ml), C. parapsilosis (31.25 MIC µg/ml) and C. albicans (MIC 62.5 µg/ml), both with the same results for these organisms. Regarding the bacterial strains, the most sensitive one was the S. aureus with 250 µg/ml MIC...

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Phenolic Antioxidants from the Heartwood of Acacia confusa

Cited by 75 publications

References 32 publications

Evaluation of beetroot (Beta vulgaris L.) leaves during its developmental stages: a chemical composition study

Evaluation of beetroot (Beta vulgaris L.) leaves during its developmental stages: a chemical composition study

Determination of antioxidant, radical scavenging activity and total phenolic compounds of Artocarpus heterophyllus (Jackfuit) seeds extracts

Quantificação de metabólitos secundários e avaliação da atividade antimicrobiana e antioxidante de algumas plantas selecionadas do Cerrado de Mato Grosso

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