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A Pyranine based Procedure for Evaluation of the Total Antioxidant Potential (TRAP) of Polyphenols: A Comparison with closely related Methodologies Biol. Res.
CAMPOS,ANA MARÍA; SOTOMAYOR,CARLOS PATRICIO; PINO,EDUARDO; LISSI,EDUARDO.
A novel procedure for the evaluation of total reactive antioxidant potentials (TRAP) is described. The method is based on the measurement of the bleaching of pyranine by peroxyl radicals. The addition of the antioxidants produces a clear induction time whose magnitude is directly related to the antioxidant concentration. A comparison of the values obtained with those reported employing closely related methodologies shows that the results are significantly affected by the substrate employed to monitor the steady state free radical concentration. Possible sources of this dependence are discussed
Tipo: Journal article Palavras-chave: Peroxyl radicals; Polyphenols; Pyranine; Total reactive antioxidant potential.
Ano: 2004 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000200015
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A single dose of purple grape juice improves physical performance and antioxidant activity in runners: a randomized, crossover, double‑blind, placebo study. Repositório Alice
TOSCANO, L. de L. T.; SILVA, A. S.; FRANÇA, A. C. L. de; SOUSA, B. R. V. de; ALMEIDA FILHO, E. J. B. de; COSTA, M. da S.; BIASOTO, A. C. T.; SILVA, D. F. da; SENA, K. de F.; CERQUEIRA, G. S.; GONÇALVES, M. da C. R..
PurposeTo investigate the effects of a single dose of juice on physical performance, oxidative stress, inflammation and muscle damage in runners.Methods Fourteen recreational male runners (39 ± 9 years, VO2peak = 55.9 ± 6.5 ml/kg/min) performed two running tests to exhaustion at 80% of VO2max after ingesting grape juice or a placebo drink (10 ml/kg/day) randomly. Blood samples were taken before and 2 h after supplementation and immediately after running to analyze total antioxidant capacity (TAC), malondialdehyde (MDA), alpha-1 acid glycoprotein (A1GPA), high-sensitivity C-reactive protein (hs-CRP), creatine kinase (CK) and lactate dehydrogenase (LDH).ResultsThe participants ran for an average of 59.2 ± 27.8 min until exhaustion in the placebo group and...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Sumo de uva roxa; Desempenho físico; Atividade antioxidante; Nutrição; Uva; Dieta; Polyphenols; Oxidative stress; Athletic performance.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1120803
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A viticultura e a agroindústria de suco de uvas americanas em um mercado em crescimento. Repositório Alice
RITSCHEL, P. S.; MAIA, J. D. G.; PROTAS, J. F. da S.; GUERRA, C. C.; PEREIRA, G. E.; LIMA, M. dos S..
No Brasil, a produção e o consumo de suco de uva vem crescendo nos últimos anos, sendo realizada com o uso de uma matriz diversificada de cultivares de uvas do tipo americano. Esta base inclui variedades tradicionais e suas mutações precoces, além de novas cultivares brasileiras, criadas para contribuir para a solução de demandas do segmento de sucos de uva. A viticultura brasileira voltada para a produção de sucos é praticada em diferentes sistemas de cultivo e condições ambientais, que abrangem regiões de clima temperado, onde a uva é produzida sob o sistema tradicional, até regiões de clima subtropical e tropical, onde inovações no sistema de produção permitem a realização de duas ou mais colheitas anuais. A tecnologia de extração de sucos é baseada na...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: American grapevine cultivar; Brazilian grapevine cultivars; South; Temperate climate; Subtropical climate; Northeast; Tropical climate; Cultivares de videiras americanas; Cultivares de videiras brasileiras; Suco de uva; Antocianinas; Polifenois; Sul; Clima subtropical; Nordeste; Clima troícal; Clima Tropical; Grape juice; Anthocyanins; Polyphenols.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1103070
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Acerola and cashew apple as sources of antioxidants and dietary fibre. Repositório Alice
RUFINO, M. do S. M.; PÉREZ-JIMÉNES, J.; TABERNERO, M.; ALVES, R. E.; BRITO, E. S. de; SAURA-CALIXTO, F..
2010
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Anacardium occidentale; Antioxidant capacity; Dietary fibre; Malpighia emarginata; Polyphenols.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/handle/doc/880807
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Alginate-pomegranate peels' polyphenols beads: effects of formulation parameters on loading efficiency BJPS
Zam,Wissam; Bashour,Ghada; Abdelwahed,Wassim; Khayata,Warid.
Calcium alginate beads containing pomegranate peels' polyphenol extract were encapsulated by ionic gelation method. The effects of various formulation factors (sodium alginate concentration, calcium chloride concentration, calcium chloride exposure time, gelling bath time maintaining, and extract concentration) on the efficiency of extract loading were investigated. The formulation containing an extract of 1 g pomegranate peels in 100 mL distilled water encapsulated with 3 % of sodium alginate cured in 0.05 M calcium chloride for 20 minutes and kept in a gelling bath for 15 minutes was chosen as the best formula regarding the loading efficiency. These optimized conditions allowed the encapsulation of 43.90% of total extracted polyphenols and 46.34 % of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pomegranate/polyphenols/microencapsulation; Calcium alginate beads/microencapsulation; Microencapsulation; Polyphenols; Natural antioxidants/microencapsulation.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502014000400741
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Anthocyanin-rich extract decreases indices of lipid peroxidation and DNA damage in vitamin E-depleted rats IPB - Escola Superior Agrária
Ramirez-Tortosa, Carmen; Cabrita, Luís; Andersen, Øyvind M.; Gardner, P.T.; Morrice, P.C.; Wood, S.G.; Duthie, S.J.; Collins, A.R.; Garry, G.G..
Anthocyanins are secondary plant metabolites responsible for the blue, purple, and red color of many plant tissues. The phenolic structure of anthocyanins conveys marked antioxidant activity in model systems via donation of electrons or hydrogen atoms from hydroxyl moieties to free radicals. Dietary intakes of anthocyanins may exceed 200 mg/day, however, little is known about their antioxidant potency in vivo. Consequently, the aim of this study was to establish whether anthocyanins could act as putative antioxidant micronutrients. Rats were maintained on vitamin E-deficient diets for 12 weeks in order to enhance susceptibility to oxidative damage and then repleted with rations containing a highly purified anthocyanin-rich extract at a concentration of 1...
Tipo: Article Palavras-chave: Anthocyanins; Polyphenols; Lipid peroxides; DNA damage; Antioxidants; Free radicals.
Ano: 2001 URL: http://hdl.handle.net/10198/3368
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Anti-Bacterial Activity of Phenolic Compounds against Streptococcus pyogenes ArchiMer
Macé, Sabrina; Truelstrup Hansen, Lisbeth; Rupasinghe, H. P. Vasantha.
Background: Worldwide, Streptococcus pyogenes is the leading cause of bacterial pharyngitis. To reduce the use of antibiotics, antimicrobial phytochemical-containing remedies, which have long been in use in traditional medicine, may provide new approaches for management of streptococcal pharyngitis. The objective of this study was to assess the inhibitory activities of 25 natural phenolic compounds against three strains of S. pyogenes. Methods: After an initial screening, the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of the nine most effective phenolic compounds were determined. The effect of four compounds with the lowest MIC and MBC on streptococcal growth and biofilm formation was also studied. Results:...
Tipo: Text Palavras-chave: Pharyngitis; Strep throat; Biofilm; Naphthoquinone; Infection; Disease; Polyphenols.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00603/71515/69934.pdf
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Antidiarrheal effect of extract from the bark of Combretum leprosum in mice Anais da ABC (AABC)
CAVALCANTI,PAULO M.S.; MARTINS,MARIA DO CARMO C.; NUNES,PAULO H.M.; ALVES FILHO,FRANCISCO C.; SILVA,JANYERSON D.P.; CAVALCANTI,SUZANA M.G..
Abstract This study investigated the effects of the ethanolic extract from the bark of Combretum leprosum (ECL) on intestinal transit and castor-oil induced diarrhea in mice. The oral administration of ECL (750 and 1000 mg/kg) slowed intestinal transit (ID50 of 455 mg/kg). The ECL (250-1000 mg/kg) reduced castor-oil induced diarrhea, in a time- and dose-dependent manner (p < 0.05). To determine if antidiarrheal effect of ECL involves α2-adrenergic or opioid receptor activation, the mice were pretreated with antagonists of these receptors, yohimbine or naloxone respectively. None of these drugs inhibited the antidiarrheal effect of ECL. To test if antidiarrheal effect of ECL is due to an antisecretory action, we realized the enteropooling assay on rats....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Combretum leprosum; Antidiarrheal effect; Medicinal plants; Polyphenols; Intestinal transit; Enteropooling.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100701
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Antimicrobial and antibiofilm activities of phenolic compounds extracted from Populus nigra and Populus alba buds (Algeria) BJPS
Nassima,Boumghar; Nassima,Behidj; Riadh,Ksouri.
The interest of this work is the discovery of new antimicrobial agents of plant origin to inhibit the formation of microbial biofilms. The present research was conducted to identify and quantify the phenolic compounds extracted from Populus nigra and Populus alba buds harvested in the area of Tizi-Ouzou (Algeria), and to evaluate their antimicrobial and antibiofilm activity. High performance liquid chromatography (HPLC) was performed to identify the phenolic compounds in the ethyl acetate fraction of P. nigra and the methanolic extracts of P. nigra and P. alba. The antimicrobial activity of the crude extracts and the fractions of these two species was tested against 11 microorganisms, using the disk diffusion method, while the antibiofilm effect of certain...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Populus nigra; Populus alba; HPLC; Polyphenols; Antimicrobial activity; Antibiofilm activity.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100563
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Antioxidant action in diets with ground soybeans on ruminal microbial production, digestion, and fermentation in buffaloes R. Bras. Zootec.
Zeoula,Lucia Maria; Machado,Erica; Carraro,Jocasta; Aguiar,Sílvia Cristina; Yoshimura,Emerson Henri; Agustinho,Bruna Calvo; Santos,Fabio Seiji dos; Santos,Nadine Woruby.
ABSTRACT The objective of this study was to evaluate the effect of adding ground soybeans and antioxidants to diet of buffaloes on intake, ruminal microbial production, total and ruminal digestibility of nutrients, and ruminal fermentation parameters. Four crossbred buffaloes with a mean weight of 506±29 kg were distributed in a 4×4 Latin square. Four diets were tested: control; diet with ground soybeans; diet with ground soybeans and supplementation with yerba mate; and diet with ground soybeans and supplementation with yerba mate and vitamin E. The addition of ground soybeans had negative effects on intake of dry matter, organic matter, crude protein, neutral detergent fiber, and acid detergent fiber, as well as ruminal digestibility of neutral detergent...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ether extract; Polyphenols; Ruminal manipulation; Ruminal metabolism; Tocopherol.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100709
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Antioxidant and bacteriostatic effects of the addition of extract of quillay polyphenols (Quillaja saponaria) in the marinade of broiler chicken Rev. Bras. Ciênc. Avic.
Fellenberg,MA; Espinoza,A; Peña,I; Alarcón,J.
The nutritional and sensorial characteristics of chicken meat can be affected by oxidative rancidity, process of oxidation of lipids in the meat that constitutes one of the main forms of food deterioration. This problem may be prevented or reduced by adding antioxidants to the meat during the process of marination. In the present study, the addition of a polyphenol-rich quillay extract (QLPerm®) at 5 levels (0, 0.05, 0.10, 0.15, and 0.20%) to the marinade of chicken meat was evaluated. The marinated meat was stored under refrigeration (6 ºC) for 0, 2, 4, 6, and 8 days. Basal and induced lipid oxidation was evaluated by TBARS analysis. Microbiological quality was assessed by total coliforms and mesophillic aerobe counts. The application of this natural...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler meat; Lipid oxidation; Marinade; Polyphenols; Quillay.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000100011
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Antioxidant compoundsand total antioxidant activity in fruits of acerola from cv. Flor Branca, Florida Sweet and BRS 366 Rev. Bras. Frutic.
Souza,Kellina Oliveira de; Moura,Carlos Farley Herbster; Brito,Edy Sousa de; Miranda,Maria Raquel Alcântara de.
Information on antioxidant properties at different ontological stages may help producers and food technologists to identify which cultivar and/or maturity stage are most adequate for their need, therefore this work aimed to study the changes in the antioxidant metabolism during acerola development. Fruit from cv. Flor Branca, BRS366 and Florida Sweet were harvested at different stages: immature green colored (I), physiologically mature with green color and maximum size (II), breaker (III) and full red ripe (IV). After harvest, fruits were selected, divided into four replications with 500 g each and evaluated regarding their titratable acidity, pH, soluble solids, total soluble sugar, vitamin C, polyphenol, anthocyanin, yellow flavonoid, total antioxidant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Malpighia emarginata; Development; Vitamin C; Enzymes; Polyphenols.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452014000200004
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Antioxidant Effects of Protocatechuic Acid, Ferulic Acid, and Caffeic Acid in Human Neutrophils Using a Fluorescent Substance International Journal of Morphology
Hyogo,Akiyo; Kobayashi,Toshihiro; Garcia del Saz,Eva; Seguchi,Harumichi.
Human neutrophils stimulated by phorbol myristate acetate (PMA), an activator of protein kinase C, produce active oxygen by NADPH oxidase in intracellular structures. We added succinimidyl ester of dichlorodihydrofluorescein diacetate (H2DCFDA), which first emits fluorescence when oxidized with active oxygen species, to neutrophils to produce active oxygen, in order to investigate the antioxidant effects of protocatechuic acid, ferulic acid, and caffeic acid which belong to polyphenols and are widely distributed among plants. Particularly, we focused on examining whether these substances capture and eliminate active oxygen inside or outside the neutrophil cytoplasm and whether these substances inhibit NADPH oxidase. Fluorescence microscopy demonstrated...
Tipo: Journal article Palavras-chave: Antioxidant effects; Polyphenols; Human neutrophils; Flow cytometry.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300040
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Atividade antioxidante e polifenóis totais em frutos de variedades melhoradas de mamoeiro. Repositório Alice
LIMA, L. F.; REIS, R. C.; VIANA, E. de S.; JESUS, J. L. de; SANTOS, T. M. S.; SANTOS JÚNIOR, M. B. dos; ANDRADE, M. V. S. de.
O mamão destaca-se pelo elevado valor nutricional e também por apresentar compostos bioativos, que atuam como agentes antioxidantes, reduzindo o risco de desenvolvimento de patologias, como arteriosclerose e câncer. O presente estudo busca identificar variedades de mamão, desenvolvidas pelo programa de melhoramento genético da Embrapa Mandioca e Fruticultura, que se destaquem por apresentar elevados teores de polifenóis totais e maior potencial antioxidante em relação às variedades comumente consumidas.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Mamão; Antioxidante; Papayas; Polyphenols.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/966396
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Avenanthramides and nutritional components of four mexican oat (Avena sativa L.) varieties Agrociencia
Ortiz-Robledo,Faviola; Villanueva-Fierro,Ignacio; Oomah,B. Dave; Lares-Asef,Ismael; Proal-Nájera,J. Bernardo; Návar-Chaidez,J. Jesús.
Oat (Avena sativa L.) is a cereal grain, its seeds are rich in nutrients, is consumed as whole grain with health benefits fot humans due to its antioxidants, such as the avenanthtamides (Avns). The contents of Avns 2c, 2f and 2p were evaluated by HPLC in groats and hulls of oat varieties Chihuahua, Cuauhtemoc, Raima and Avemex cultivated in Durango, México. The association of these Avns with protein, fat, crude fiber and ash of oat was also investigated. A 4x2 bifactorial design was used, with the number of varieties and groats ot hulls as factors. Avns contents differed significantly (p<0.05) among oat varieties, groats and hulls. Avemex groats had the highest concentrations of Avns: 3.6±0.7, 3.0±0.5 and 3.3±0.6 mg kg-1 fot 2c, 2f and 2p Avns. Avemex...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidants; Groats; Hulls; Oat; Polyphenols.
Ano: 2013 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952013000300002
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Bioactive compounds and acceptance of cookies made with Guava peel flour Ciênc. Tecnol. Aliment.
Bertagnolli,Silvana Maria Michelin; Silveira,Márcia Liliane Rippel; Fogaça,Aline de Oliveira; Umann,Liziane; Penna,Neidi Garcia.
The use of fruit industrial waste in the processing new foods represents an important new step for the food industry. This study aimed to develop cookie recipes using different amounts of guava peel flour (GPF) levels (30%, 50%, and 70%) to evaluate the proximate composition, and the phenolic compound, lycopene, and β-carotene levels in the cookies and flour and to evaluate the cookie sensory acceptance. The results demonstrated low moisture, lipid and carbohydrate contents in the flour and cookies. GPF was considered rich in fiber, ash, polyphenols, and β-carotene. The sensory analysis showed satisfactory acceptance of the cookies containing 30% GPF regarding the aroma, flavor, and texture attributes. The cookies containing 50% and 70% GPF received...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Polyphenols; Sensory analysis; Proximate composition.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000200013
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Bioactive compounds and antioxidant activity in fruits of clone and ungrafted genotypes of yellow mombin tree Ciênc. Tecnol. Aliment.
Silva,Fernanda Vanessa Gomes da; Silva,Silvanda de Melo; Silva,Gerciane Cabral da; Mendonça,Rejane Maria Nunes; Alves,Ricardo Elesbão; Dantas,Ana Lima.
Yellow mombin is a fruit tree that grows spontaneously in the Semi-Arid Northeastern Brazil. Its fruits are still extractively exploited. The pulp of yellow mombin fruit stands out regarding the commercial aspect due to the characteristic flavor and aroma felt when consumed in diverse ways. This study aimed to evaluate the presence of bioactive compounds, total extractable polyphenols, and antioxidant activity of yellow mombin fruits (Spondias mombin, L.), from clone and ungrafted genotypes. The fruits were harvested at commercial maturity from twelve yellow mombin tree genotypes from an experimental orchard located at the municipality of Joao Pessoa, Paraíba, Brazil, and evaluated for chlorophyll, carotenoids, yellow flavonoids, total extractable...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Spondias mombin L.; Carotenoids; Polyphenols; Yellow flavonoids; Inhibition of oxidation; Plant breeding.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000400008
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Bioactive compounds and antioxidant activity of cashew apple (Anacardium occidentale L.) from commercial early dwarf clones. Repositório Alice
ABREU, C. R. A.; MAIA, G. A.; FIGUEIREDO, R. W. de; SOUSA, P. H. M.; ALVES, R. E.; BRITO, E. S. de; MOURA, C. F. H.; RUFINO, M. do S. M..
2009
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Ascorbic acid; Yellow flavonoids; Anthocyanins; Polyphenols; Carotenoids.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/631677
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Bioactive compounds and antioxidant activity on fruits from different açaí (Euterpe oleracea Mart) progenies. Repositório Alice
SOUZA, M. C. de; FIGUEIREDO, R. W. de; MAIA, G. A.; ALVES, R. E.; BRITO, E. S. de; MOURA, C. F. H.; RUFINO, M. do S. M..
2009
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Ascorbic acid; Yellow flavonoids; Anthocyanins; Polyphenols; Carotenoids.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/631770
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Bioactive compounds and chemical composition of Brazilian Cerrado fruits’ wastes: pequi almonds, murici, and sweet passionfruit seeds Ciênc. Tecnol. Aliment.
ARAÚJO,Ana Cristina Moreira Andrade; MENEZES,Evandro Galvão Tavares; TERRA,André William Costa; DIAS,Bruna Oliveira; OLIVEIRA,Érica Resende de; QUEIROZ,Fabiana.
Abstract Pequi, murici and sweet passionfruit are typical fruits from Brazilian Cerrado, which stand out for their sensory attributes such as color, flavor and aroma, in addition to their high nutritional value. Their seeds are by-products from the industrial processing of juices, pulps, jellies, and others, and have great exploitation potential due to their high oil content and the presence of bioactive compounds. The present work aimed to evaluate the chemical composition of pequi almonds, and of murici and sweet passionfruit seeds, and also to quantify the total phenolic compounds, carotenoids, anthocyanins and antioxidant activity by the scavenging activity of •DPPH method. Concerning the chemical composition, pequi almonds presented the highest...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioactive compounds; Antioxidants; Polyphenols; Anthocyanins; Nutritional composition.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000500203
Registros recuperados: 92
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