Consulta: subjectFacets:"Polyphenols"
Registros recuperados: 51
Data/hora: 04/06/2024 01:07:08

Isolation of high-quality RNA from Platycladus orientalis and other Cupressaceae plants
Provedor de dados: 69
Autores: Chang,Ermei; Zhao,Yuxin; Wei,Qianchun; Shi,Shengqing; Jiang,Zeping.
Platycladus orientalis has a lifespan of several thousand years in China, making it a good plant in which to study aging at the molecular level, but this requires sufficient quantities of high-quality P. orientalis RNA. However, no appropriate methods have been reported for total RNA isolation from P. orientalis leaves. The TRIzol method did not extract RNA, while cetyltrimethylammonium bromide, sodium dodecyl sulfate-phenol, and plant RNAout kit (Tianz, Inc., China) protocols resulted in low yields of poor quality RNA. Isolating total RNA using the Spectrum™ Plant Total RNA Kit (Sigma-Aldrich, St. Louis, MO, USA) resulted in a high-quality product but a low yield. However, the two-step removal of polyphenols and polysaccharides in the improved plant...
Tipo: Journal article
Palavras-chave: Cupressaceae plants; Polysaccharides; Polyphenols; Total RNA isolation; Two-step removal of polyphenols and polysaccharides.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000500004

Processing quality of potato tubers produced during autumn and spring and stored at different temperatures
Provedor de dados: 75
Autores: Freitas,Sergio T de; Pereira,Engil Isadora P; Gomez,Ana Cecília S; Brackmann,Auri; Nicoloso,Fernando; Bisognin,Dilson A.
The objective of this work was to access processing quality of potato clones (Solanum tuberosum) Asterix, SMINIA793101-3, and Missaukee cultivated during spring and autumn growing seasons and stored at 4, 8, 12, or 25ºC. Clones grown in spring had shorter dormancy than clones grown in autumn. Potato tubers grown in spring and autumn and stored at 4ºC, as well as tubers grown in autumn and stored at 8ºC had no sprouting for six months. Among clones grown in autumn, the longest dormancy period during storage at 12ºC was observed in the clone SMINIA793101-3, and at 25ºC was in the clone Asterix. In potato tubers grown in spring, the longest dormancy period during storage at 8ºC was observed in the clones SMINIA793101-3 and Missaukee, at 12ºC was in the clone...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum tuberosum; Dry matter; Respiration; Chip color; Reducing sugars; Polyphenols.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000100016

Species-Specific Antioxidant Power and Bioactive Properties of the Extracts Obtained from Wild Mediterranean Calendula Spp. (Asteraceae)
Provedor de dados: 5
Autores: Messina, Concetta Maria; Troia, Angelo; Arena, Rosaria; Manuguerra, Simona; Ioannou, Theodora; Curcuraci, Eleonora; Renda, Giuseppe; Hellio, Claire; Santulli, Andrea.
n this study we focused on four taxa of the genus Calendula (C. maritima, C. suffruticosa subsp. fulgida, C. arvensis, and the hybrid between the first two ones), collected in Mediterranean area (Sicily). Six extracts for each species were obtained using solvents with increasing polarity (hexane, ethanol 80%, acetone 70%, and water) and through extraction by supercritical fluids (SFE). It has been observed that the solvent with the highest extraction efficiency was ethanol 80% for all species. However, SFE extracts showed high antioxidant activity comparable to the ethanol 80% extract (polyphenol, DPPH, and reducing power method). These findings were confirmed by in vitro analysis (MTT assay) where it was observed that the tested concentration (24 µg/mL),...
Tipo: Text
Palavras-chave: Calendula species; Marigold; Supercritical fluid extraction; Bioactivity; Antioxidants; Polyphenols.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00591/70336/68389.pdf

Procyanidin—Cell Wall Interactions within Apple Matrices Decrease the Metabolization of Procyanidins by the Human Gut Microbiota and the Anti-Inflammatory Effect of the Resulting Microbial Metabolome In Vitro
Provedor de dados: 5
Autores: Le Bourvellec, Carine; Bagano Vilas Boas, Priscilla; Lepercq, Pascale; Comtet-marre, Sophie; Auffret, Pauline; Ruiz, Philippe; Bott, Romain; Renard, Catherine; Dufour, Claire; Chatel, Jean-marc; Mosoni, Pascale.
B-type oligomeric procyanidins in apples constitute an important source of polyphenols in the human diet. Their role in health is not known, although it is suggested that they generate beneficial bioactive compounds upon metabolization by the gut microbiota. During apple processing, procyanidins interact with cell-wall polysaccharides and form stable complexes. These interactions need to be taken into consideration in order to better assess the biological effects of fruit constituents. Our objectives were to evaluate the impact of these interactions on the microbial metabolization of cell walls and procyanidins, and to investigate the potential anti-inflammatory activity of the resulting metabolome, in addition to analyzing the taxonomical changes which...
Tipo: Text
Palavras-chave: In vitro batch fermentation; Polyphenols; Dietary fiber; 16S metabarcoding; Metabotype.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00485/59712/62805.pdf

Anti-Bacterial Activity of Phenolic Compounds against Streptococcus pyogenes
Provedor de dados: 5
Autores: 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

From Ecology to Biotechnology, Study of the Defense Strategies of Algae and Halophytes (from Trapani Saltworks, NW Sicily) with a Focus on Antioxidants and Antimicrobial Properties
Provedor de dados: 5
Autores: Messina, Concetta Maria; Renda, Giuseppe; Laudicella, Vincenzo Alessandro; Trepos, Rozenn; Fauchon, Marilyne; Hellio, Claire; Santulli, Andrea.
This study aimed at the characterization of the antioxidant power of polyphenol extracts (PE) obtained from the algae Cystoseira foeniculacea (CYS) (Phaeophyta) and from the halophyte Halocnemum strobilaceum (HAL), growing in the solar saltworks of western Sicily (Italy), and at the evaluation of their anti-microfouling properties, in order to correlate these activities to defense strategies in extreme environmental conditions. The antioxidant properties were assessed in the PE based on the total antioxidant activity test and the reducing power test; the anti-microfouling properties of the two PE were evaluated by measuring the growth inhibition of marine fish and shellfish pathogen bacteria as well as marine surface fouling bacteria and microalgae exposed...
Tipo: Text
Palavras-chave: Polyphenols; Defenses; Anti-oxidants; Antifouling; Anti-microbial; Cystoseira foeniculacea; Halocnemum strobilaceum.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00605/71675/70090.pdf

Antioxidant Effects of Protocatechuic Acid, Ferulic Acid, and Caffeic Acid in Human Neutrophils Using a Fluorescent Substance
Provedor de dados: 77
Autores: 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

Contents of total phenolics and flavonoids in and antioxidant activity of Ilex paraguariensis leaves
Provedor de dados: 86
Autores: Bisognin,Dilson Antônio; Luz,Leandro Vinícius da; Lencina,Kelen Haygert; Santos,Clarissa Obem dos; Sautter,Cláudia Kaehler.
Abstract: The objective of this work was to evaluate different solvents and times in the ultrasound-assisted extraction of polyphenols, in order to quantify the total phenolic and flavonoid contents in and the antioxidant activity of mate (Ilex paraguariensis) leaves. The experiment was carried out in a completely randomized design, in a 8x3 (solvent x time of extraction) factorial arrangement. The solvent extractors were distilled water and aqueous solutions of ethanol, acetone, and methanol, acidified or not with hydrochloric acid, and the time of ultrasound-assisted extractions were 15, 30, and 45 min. All extractions were finished with a mechanical agitation of 30 min. Samples treated with acidified hydroalcoholic solvents resulted in higher values of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mate; Polarity; Polyphenols; Solvents.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000101601

Phytochemistry and quantification of polyphenols in extracts of the Asteraceae weeds from Diamantina, Minas Gerais state, Brazil
Provedor de dados: 87
Autores: Petacci,F.; Tavares,W.S.; Freitas,S.S.; Teles,A.M.; Serrão,J.E.; Zanuncio,J.C.
Asteraceae weeds are rich in chemicals that have biological and pharmaceutical activities. The aims of this work were to describe the phytochemistry and quantify the polyphenols in ethanol extracts from leaves of 12 species of Asteraceae weeds collected in Diamantina, Minas Gerais State, Brazil. The screening of Asteraceae extracts revealed the presence of tannins, steroids, triterpenes, anthocyanins, and flavonoids. The total phenolic content was high in extracts of Lychnophora ericoides (147.97 ± 2.66), Lepidaploa lilacina (141.11 ± 1.99), and Eremanthus elaeagnus (134.61 ± 7.81) and low in extracts of Lychnophora ramosissima (32.65 ± 0.70), and Lychnophora sp. (54.03 ± 0.73). Extracts of Asteraceae weeds from Diamantina could have potential for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asteraceae; Campos rupestres; Diamantina; Pesticides; Phytochemistry; Polyphenols.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000100002

Antioxidant and bacteriostatic effects of the addition of extract of quillay polyphenols (Quillaja saponaria) in the marinade of broiler chicken
Provedor de dados: 89
Autores: 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

Antioxidant compoundsand total antioxidant activity in fruits of acerola from cv. Flor Branca, Florida Sweet and BRS 366
Provedor de dados: 94
Autores: 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

Physical-chemical and chemical characterization of Passiflora cincinnata Mast fruits conducted in vertical shoot positioned trellis and horizontal trellises system
Provedor de dados: 94
Autores: D’abadia,Ana Claudia Alves; Costa,Ana Maria; Faleiro,Fábio Gelape; Malaquias,Juaci Vitória; Araújo,Francisco Pinheiro de.
Abstract Passiflora cincinnata Mast. or Caatinga passion fruit is widely cultivated in the northeastern semi-arid regions of Goiás, Minas Gerais, and Bahia. The system of cultivation and field management of the Passiflora species affects the physicochemical quality of its fruits. In this study, we evaluated the chemical and physico-chemical characteristics of the fruits of 2 progenies (CPEF2220 and CBAF2334) of P. cincinnata species using the vertical and horizontal trellis system. Fruits were collected from the plants at their physiological maturation stage and tested for the fruit skin color and texture and the pH, total soluble solids, titratable acidity, pulp acidity ratio, and the contents of flavonoids, anthocyanins, and polyphenols in the seedless...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flavonoids; Coloration; Polyphenols; Acidity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000600901

Antioxidant action in diets with ground soybeans on ruminal microbial production, digestion, and fermentation in buffaloes
Provedor de dados: 96
Autores: 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

Standardization of the quality control parameters of the Tamarindus indica L. soft extract
Provedor de dados: 98
Autores: Rodríguez-Amado,Jesús; Pérez Rosés,Renato; Escalona-Arranz,Julio César; Lafourcade Prada,Ariadna; Sierra González,Gustavo.
Introduction: Tamarindus indica L or Tamarind as commonly known is a medicinal plant witha broad spectrum of application in medicine. Tamarind is the most useful plant for liver disorders treatment in Cuba and The Caribbean. People use it as decoction and have to take up to four liters a day of this preparation, because the use of alcohol in the Tamarind fluid extracts prevent its use in patient with lever desorders. Objective: the aim of this study was the preliminary establisment of quality control parameters of the Tamarindus indica L. soft extract as a novel alcohol-free active ingredient for solids pharmaceutical formulation. Methods: organoleptics properties, total solids, relative density, pH, and total ashes were stablished. The polyphenols content...
Tipo: Journal article
Palavras-chave: Soft extract; Polyphenols; Flavonoids; Antioxidant; Tamarind; Tamarindus indica.
Ano: 2012
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962012000100012

Organoleptic quality assessment of Theobroma cacao L. in cocoa farms in northern Huila, Colombia
Provedor de dados: 109
Autores: Machado Cuellar,Leidy; Ordoñez Espinosa,Claudia Mercedes; Angel Sánchez,Yimi Katherine; Guaca Cruz,Lised; Suárez Salazar,Juan Carlos.
Abstract Cocoa is a food product with sensory and organoleptic attributes that depends on postharvest processes such as fermentation. This process affects not only the sensory profile, but also chemical reactions and therefore, the quality of the product. Hence, the aim of this study is to carry out a chemical and sensory characterization of cocoa (Theobroma cacao L.) samples from different cocoa farms in the department of Huila, Colombia. Moreover, a bromatological analysis was performed, secondary metabolites (caffeine and theobromine) and total polyphenols were determined, as well as volatile fraction compounds using gas chromatography by solid phase microextraction in the headspace mode (HS-SPME); finally, the samples were classified (acceptable,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bromatological analysis; Secondary metabolites; Polyphenols; Volatile fraction compounds; Sensory analysis; Sensory attributes.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100046

Chemical composition and antioxidant activity of geopropolis produced by Melipona fasciculata (Meliponinae) in flooded fields and cerrado areas of Maranhão State, northeastern Brazil
Provedor de dados: 36
Autores: BATISTA,Marisa Cristina Aranha; ABREU,Bruno Vinicius de Barros; DUTRA,Richard Pereira; CUNHA,Mayara Soares; AMARAL,Flavia Maria Mendonça do; TORRES,Luce Maria Brandão; RIBEIRO,Maria Nilce de Sousa.
ABSTRACT Geopropolis, a mixture of plant resin, wax, soil and salivary secretion, is produced by the stingless bee Melipona fasciculata. This aim of this study was to investigate the chemical composition and antioxidant activity of geopropolis collected from beehives in two phytogeographical regions, flooded fields and cerrado, in the municipalities of Palmeirândia and Fernando Falcão, Maranhão State, northeastern Brazil. The geopropolis compounds were identified by gas chromatography-mass spectrometry (GC/MS). Additionally, total phenolic content was determined with the Folin−Ciocalteu reagent and antioxidant activity was evaluated in vitro by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. The four geopropolis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stingless bee; Polyphenols; Triterpenes; Phytogeographical regions.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000300315

Changes in the amount of soluble carbohydrates and polyphenols contents during decomposition of Montrichardia arborescens (L.) Schott
Provedor de dados: 36
Autores: Cunha-Santino,Marcela Bianchessi da; Pacobahyba,Lucilia Dias; Bianchini Jr,Irineu.
This study describes the aerobic and anaerobic decay of soluble carbohydrates (CH) and polyphenols (PH) during decomposition of Montrichardia arborescens. Plant and water samples were collected in the Cantá stream (2º 49' 11" N and 60º 40' 24" W), Roraima, Brazil. Decomposition chambers with plant fragments and stream water were incubated. Particulate organic matter was separated from dissolved organic matter and concentrations of CH and PH were determined. The results were fitted to 1st order kinetics models. CH and PH comprised a labile fraction (LCH and LPH) and a refractory fraction (RCH and RPH). The global coefficient associated with LCH weight loss was 1.4 times higher under aerobic conditions (3.4 day-1) higher than for anaerobic conditions. On the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbohydrates; Polyphenols; Aerobic and anaerobic decomposition; Montrichardia arborescens.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672003000300011

Degradação ruminal e síntese de proteína microbiana em bovinos alimentados com silagem de sorgo contendo tanino suplementado com concentrado ou uréia - DOI: 10.4025/actascianimsci.v31i1.502
Provedor de dados: 2
Autores: Oliveira, Simone Gisele de; UFPR; Berchielli, Telma Teresinha; UNESP; Pedreira, Márcio dos Santos; UESB; Fernandes, Juliano José de Resende; UFG; Pires, Alexandre Vaz; ESALQ/USP.
Determinaram-se a degradabilidade ruminal da matéria seca (MS) e a fibra em detergente neutro (FDN) e a eficiência de síntese de proteína microbiana em animais que consomem dietas contendo silagem de sorgo com diferentes teores de tanino. A degradação in situ foi avaliada por meio da incubação ruminal de silagens de sorgo contendo nível 1 (N1) e nível 2 (N2) de tanino por 0, 6, 24, 48 e 96h. O delineamento experimental utilizado foi o quadrado latino 4 x 4 duplicado. Os valores de degradabilidade potencial (DP) da MS foram semelhantes entre as silagens, enquanto a degradabilidade efetiva (DE) nas silagens foi reduzida ao adicionar concentrado à dieta. O fluxo de nitrogênio microbiano e a eficiência de síntese de proteína microbiana não foram afetados pela...
Palavras-chave: 5 5.04.00.00-2 Zootecnia degradabilidade; Forragem conservada; Polifenóis 5 5.04.00.00-2    Zootecnia degradability; Conserved forage; Polyphenols.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/502

Intake, digestibility of nutrients, milk production and composition in dairy cows fed on diets containing cashew nut shell liquid
Provedor de dados: 2
Autores: Coutinho, Diogo Antignani; Universidade Estadual de Maringá; Branco, Antonio Ferriani; Universidade Estadual de Maringá; Santos, Geraldo Tadeu dos; Universidade Estadual de Maringá; Osmari, Milene Puntel; Universidade Estadual de Maringá; Teodoro, Ana Lucia; Universidade Estadual de Maringá; Diaz, Tatiana Garcia; Universidade Estadual de Maringá.
The study evaluated the effects of supplementing cashew nut shell liquid (CNSL) in the diet of lactating dairy cows on the intake, nutrient digestibility, milk yield and composition, and fatty acids composition of milk fat. Four Holsteincows (600±43 kg) were used in a 4 x 4 Latin square design with 21 days experimental periods. Experimental treatments consisted of CNSL inclusion in a total mixed ration (dry matter basis), as follows: 1) CNSL 0% (control, CON), 2) CNSL 0.012% (0.012), 3) CNSL 0.024% (0.024) and 4) CNSL 0.036% (0.036). Dry matter and nutrients intake, apparent digestibility of nutrients, fat corrected milk yield and milk composition were not affected (p &amp;gt; 0.05) by the inclusion of CNSL in the ration. CNSL linearly decreased the C6:0...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.03.00-1 cardol; Cardanol; Methylcardol; CNSL; Polyphenols.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/23512

Avenanthramides and nutritional components of four mexican oat (Avena sativa L.) varieties
Provedor de dados: 115
Autores: 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&lt;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

Mechanisms of Endothelial Protection by Natural Bioactive Compounds from Fruit and Vegetables
Provedor de dados: 42
Autores: MONSALVE,BERNARDITA; CONCHA-MEYER,ANIBAL; PALOMO,IVÁN; FUENTES,EDUARDO.
ABSTRACT The endothelium is fundamental for the regulation of vascular tone and structure. Under disease conditions, including the presence of cardiovascular disease risk factors, the endothelium loses its protective role and becomes a proatherosclerotic structure. In this article we searched for strategies from PUBMED and Science Direct databases using the following key words: endothelium, natural bioactive compounds, polyphenols and cardiovascular diseases. The search was restricted to english language papers. Studies have identified the contribution of diet to the risk of developing cardiovascular diseases. In this context, high intakes of fruit and vegetables are associated with the decrease of cardiovascular diseases. Thus the most important...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endothelium; Natural bioactive compounds; Polyphenols; Cardiovascular diseases.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000200615

Evaluation of Chemical Constituents and Antioxidant Activity of Coconut Water (Cocus nucifera L.) and Caffeic Acid in Cell Culture
Provedor de dados: 42
Autores: SANTOS,JOãO L.A.; BISPO,VANDERSON S.; B.C. FILHO,ADRIANO; PINTO,ISABELLA F.D.; DANTAS,LUCAS S.; VASCONCELOS,DAIANE F.; ABREU,FABíULA F.; MELO,DANILO A.; MATOS,ISAAC A.; FREITAS,FLORêNCIO P.; GOMES,OSMAR F.; MEDEIROS,MARISA H.G.; MATOS,HUMBERTO R.
Coconut water contains several uncharacterized substances and is widely used in the human consumption. In this paper we detected and quantified ascorbic acid and caffeic acid and total phenolics in several varieties of coconut using HPLS-MS-MS (25.8 ± 0.6 µg-mL and 1.078 ± 0.013 µg-mL and 99.7 µg-mL, respectively, in the green dwarf coconut water, or 10 mg and 539 µg and 39.8 mg for units of coconut consumed, 500 ± 50 mL). The antioxidant potential of four coconut varieties (green dwarf, yellow dwarf, red dwarf and yellow Malaysian) was compared with two industrialized coconut waters and the lyophilized water of the green dwarf variety. All varieties were effective in scavenging the DPPH radical (IC50=73 µL) and oxide nitric (0.1 mL with an IP of 29.9%) as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Ascorbic acid; Caffeic acid; Cocos nucifera; Polyphenols.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401235

Propolis from Southwest of Parana produced by selected bees: Influence of seasonality and food supplementation on antioxidant activity and phenolic profile
Provedor de dados: 42
Autores: CALEGARI,MATHEUS A.; PRASNIEWSKI,ANACLARA; SILVA,CLEIDIANE DA; SADO,RICARDO Y.; MAIA,FABIANA M.C.; TONIAL,LARISSA M.S.; OLDONI,TATIANE L.C.
ABSTRACT Propolis produced by selected bees Apis mellifera were collected from March to June of 2013 and in March of 2015 and analyzed in order to evaluate the influence of climate, colony of origin, and food supplementation of colonies on the content of total phenolic and flavonoid by chromatographic analysis and antioxidant activity by radical scavenging of 2,2-diphenyl-1-picrylhydrazyl hydrate (DPPH) and 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and ferric reducing antioxidant power (FRAP) methods. The Principal Component Analysis (PCA) was carried out with propolis collected in 2013 and two clusters were formed. Propolis produced in the months of March and April showed a higher content of total phenolic compounds (TPC) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apis mellifera; Ethanolic extract; Polyphenols; Principal component analysis.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100045

Bioactive micro-constituents of ackee arilli (Blighia sapida K.D. Koenig)
Provedor de dados: 42
Autores: GRANDE-TOVAR,CARLOS D.; JOHANNES,DELGADO-OSPINA; PUERTA,LUISA F.; RODRÍGUEZ,GLORIA C.; SACCHETTI,GIAMPIERO; PAPARELLA,ANTONELLO; CHAVES-LÓPEZ,CLEMENCIA.
Abstract: Ackee (Blighia sapida K. D. Koenig) is an exotic fruit widely consumed in the Caribbean countries. While there is extensive research on the presence of hypoglycin A, other bioactive compounds have not been studied. We identified and quantified the changes in bioactive molecules (total phenol, ascorbic acid, hypoglycin A, squalene, D: A-Friedooleanan-7-ol, (7.alpha.), and oleic acid), antioxidant potential, and volatile compounds during two stages of ripe. A clear reduction in hypoglycin A, ascorbic acid, and total polyphenols during the maturation process were observed. On the contrary, oleic acid, squalene, and D: A-Friedooleanan-7-ol, (7.alpha.) contents increased about 12, 12, and 13 times, respectively with advancing maturity. These bioactive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidants; Friedooleanan; Hypoglycin; Polyphenols; Squalene.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500616

Antidiarrheal effect of extract from the bark of Combretum leprosum in mice
Provedor de dados: 42
Autores: 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 &lt; 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

Red Wine administration to Apolipoprotein E-deficient Mice reduces their Macrophage-derived Extracellular Matrix Atherogenic Properties
Provedor de dados: 48
Autores: KAPLAN,MARIELLE; AVIRAM,MICHAEL.
Proteoglycans (PGs) from the arterial extracellular matrix (ECM) contribute to the trapping of LDL and oxidized LDL (Ox-LDL) in the arterial wall, a phenomenon called "lipoprotein retention". Moreover, we have shown that subsequent to their binding to the matrix, LDL and Ox-LDL are taken up by macrophages. Oxidative stress significantly increases macrophage secretion of ECM-PGs, lipoprotein binding to the ECM and the uptake of ECM-retained lipoproteins by macrophages. The aim of the present study was to determine whether red wine administration to atherosclerotic mice would affect their peritoneal macrophage-derived extracellular matrix properties, such as the glycosaminoglycan content and the ability to bind LDL. In addition, we questioned the ability of...
Tipo: Journal article
Palavras-chave: Antioxidants; Atherosclerosis; Extracellular matrix; Macrophages; Polyphenols; Proteoglycans; Red wine.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000200010

A Pyranine based Procedure for Evaluation of the Total Antioxidant Potential (TRAP) of Polyphenols: A Comparison with closely related Methodologies
Provedor de dados: 48
Autores: 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

Polyphenols and Red Wine as Antioxidants against Peroxynitrite and other Oxidants
Provedor de dados: 48
Autores: VALDEZ,LAURA B; ÁLVAREZ,SILVIA; ZAOBORNYJ,TAMARA; BOVERIS,ALBERTO.
The antioxidant capacity of polyphenols (+)-catechin, (-)-epicatechin and myricetin, and of different types of red wines (Cabernet Sauvignon, Malbec and blended wine) was evaluated by three assays. (a) NADH oxidation by peroxynitrite (ONOO-): the ONOO- scavenging activity was higher for myricetin (IC50=35 µM) than for (+)-catechin (IC50=275 µM) and (-)-epicatechin (IC50=313 µM). (b) Peroxynitrite initiated chemiluminescence in rat liver homogenate: (-)-epicatechin (IC50=7.0 µM) and (+)-catechin (IC50=13 µM) were more potent than myricetin (IC50=20 µM) in inhibiting the chemiluminescence signal. (c) Lucigenin chemiluminescence in aortic rings: (-)-epicatechin (IC50=15 µM) and (+)-catechin (IC50=18 µM) showed higher antioxidant capacity than myricetin...
Tipo: Journal article
Palavras-chave: Antioxidant capacity; Peroxynitrite; Polyphenols; Red wines; Superoxide anion.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000200014

Evaluation of phenolic profile, antioxidant and anticancer potential of two main representants of Zingiberaceae family against B164A5 murine melanoma cells
Provedor de dados: 48
Autores: Danciu,Corina; Vlaia,Lavinia; Fetea,Florinela; Hancianu,Monica; Coricovac,Dorina E; Ciurlea,Sorina A; M &amp;#350;oica,Codru&amp;#355;a; Marincu,Iosif; Vlaia,Vicentiu; Dehelean,Cristina A; Trandafirescu,Cristina.
BACKGROUND: Curcuma longa Linnaeus and Zingiber officinale Roscoe are two main representatives ofZingiberaceae family studied for a wide range of therapeutic properties, including: antioxidant, anti-inflammatory, anti-angiogenic, antibacterial, analgesic, immunomodulatory, proapoptotic, anti-human immunodeficiency virus properties and anticancer effects. This study was aimed to analyse the ethanolic extracts of Curcuma rhizome (Curcuma longa Linnaeus) and Zingiber rhizome (Zingiber officinale Roscoe) in terms of polyphenols, antioxidant activity and anti-melanoma potential employing the B164A5 murine melanoma cell line. RESULTS: In order to evaluate the total content of polyphenols we used Folin-Ciocâlteu method. The antioxidant activity of the two...
Tipo: Journal article
Palavras-chave: Curcuma longa Linnaeus; Zingiber officinale Roscoe; Polyphenols; Antioxidant; Melanoma.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100001

Phenolic compounds and antioxidant activity of rice
Provedor de dados: 52
Autores: Walter,Melissa; Marchesan,Enio.
The aim of this work was to study the phenolic compounds identified in rice, their antioxidant activity and their potential beneficial effects on health. In vitro and in vivo studies evaluating the rice grains with different pericarp colour (light brown, red and black) showed potential beneficial effects on health related to the polyphenol content of the grain, such as reduction of oxidative stress, aid in the prevention of cancer, cardiovascular diseases and complications of diabetes, among others.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rice; Red rice; Black rice; Polyphenols; Antioxidant; Biological effect.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000200020

LED Lights Enhance Metabolites and Antioxidants in Chinese Cabbage and Kale
Provedor de dados: 52
Autores: Lee,Min Ki; Arasu,Mariadhas Valan; Park,Suhyoung; Byeon,Dong Hae; Chung,Sun-Ok; Park,Sang Un; Yong-,PyoLim; Sun-,JuKim.
Light emitting diode (LED) lights play an important role in the plant physiology and alter the metabolites in a significant manner. Glucosinolates (GSLs), polyphenols, flavonoids and antioxidant properties of Chinese cabbage and kale cultivated in varying LED lights were investigated. Analysis revealed 7 aliphatic, 3 indolyl and 1 aromatic GSLs in Chinese cabbage and kale. The total GSL content ranged from 1.5-19.08 and 1.85-24.87 µmol/g DW, and glucobrassicanapin was the predominant GSL (3) in Chinese cabbage, whereas; sinigrin (3.49 µmol/g DW) was in kale. Blue and red LED lights produced significantly higher amount of GSLs in Chinese cabbage and kale respectively. Results revealed higher amount of total polyphenol (3.845 µg/mL) and total flavanoids...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chinese cabbage; Kale; Glucosinolates; Polyphenols; Flavanoids; Antioxidant activity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100601

Physicochemical Characterization, Antioxidant Potential and Sensory Quality of Wine from Wild Edible Fruits of Flacourtia montana J. Graham
Provedor de dados: 52
Autores: Mundaragi,Abhishek; Thangadurai,Devarajan; Appaiah,Konerira Aiyappa Anu; Dandin,Chethan Jambanna; Sangeetha,Jeyabalan.
Abstract The objective of the present study was to produce wine from wild edible fruits of Flacourtia montana J. Graham. The various physicochemical attributes including total phenolic content and total flavonoid content were analyzed. Further, the prepared wine was evaluated for the antioxidant potential using four different assays, viz., 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS), 1,1-diphenyl-2-picrylhydrazyl (DPPH), reducing power assay and total antioxidant activity. Finally, the wine was subjected for the sensory evaluation. Experimental results revealed that wine had an alcohol content of 7.20%, total phenolic content of 0.776±0.032 mg GAE/ml and total flavonoids of 0.121±0.012 mg QE/ml. High performance liquid chromatography...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Flacourtia montana; Underutilized fruit; Fruit wine; Polyphenols; Antioxidant activity; Sensory evaluation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100507

Production, Composition, Fatty Acids Profile and Stability of Milk and Blood Composition of Dairy Cows Fed High Polyunsaturated Fatty Acids Diets and Sticky Coffee Hull
Provedor de dados: 52
Autores: Santos,Geraldo Tadeu dos; Schogor,Ana Luiza Bachmann; Romero,Jakeline Vieira; Lima,Luciano Soares de; Matumoto-Pintro,Paula Toshimi; Grande,Paula Adriana; Kazama,Daniele Cristina da Silva; Santos,Fabio Seiji dos.
Four lactating Holstein cows were assigned to a 4 × 4 Latin square design to determine the effects of feeding sticky coffee hull (SCH) as a source of antioxidants on dairy cows fed with high PUFA diets. The treatments (on DM basis) were control diet, diet with 30 g/kg of soybean oil, diet with 30 g/kg of soybean oil and 100 g/kg of SCH, and diet with 30 g/kg of soybean oil and 150 g/kg of SCH. Inclusion of 150 g/kg of SCH decreased the crude protein digestibility. Lower values of NDF digestibility were also observed when cows were fed with 100 g/kg and 150g/kg of SCH. The digestibility of NDT was lower in the control and 150 g/kg of SCH diets. Milk production and composition did not differ among the treatments. Inclusion of SCH increased the total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: By-product; Coffea arabica; Digestibility; Flavonoids; Milk stability; Polyphenols.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000400493

Effect of alcoholic fermentation in the content of phenolic compounds in cider processing
Provedor de dados: 52
Autores: Nogueira,Alessandro; Guyot,Sylvain; Marnet,Nathalie; Lequéré,Jean Michel; Drilleau,Jean-Francoise; Wosiacki,Gilvan.
The objective of this work was to study the effect of alcoholic fermentation on the content of phenol compounds of five cider apple varieties. The initial content in the apple juice samples, as determined by HPLC, varied from 188.4 to 2776.17 m mg.L-1. In three of them (DC, PJ, GU), the total phenol compounds remained unaffected by fermentation. However, in two (DM, KE), the final values were lower (55 and 313 mg.L-1). In these apple cider, the values of caffeic acid increased from 6.6 mg.L-1 to 41.8 mg.L-1. The catechin content increased during the process, approximately 13 mg.L-1 independent of the variety. The other phenols class did not present any modifications due to the alcoholic fermentation, maintaining the phenolic compounds of original clarified...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cider; Fermentation alcoholic; Polyphenols.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500020

Phenolic content and antibacterial activity of extracts of Hamelia patens obtained by different extraction methods
Provedor de dados: 58
Autores: Paz,Jorge Enrique Wong; Contreras,Carolina Rubio; Munguía,Abigail Reyes; Aguilar,Cristóbal Noé; Inungaray,María Luisa Carrillo.
Abstract Hamelia patens, is a plant traditionally used to treat a variety of conditions among the Huastec people of Mexico. The objective of this study is to characterize the phenolic content and critically examine the antimicrobial activity of leaf extracts H. patens, obtained by maceration, Soxhlet and percolation, using ethanol as 70% solvent. Phenolic compounds are characterized by liquid chromatography, coupled to a High Resolution Mass Spectrometry, and the antimicrobial activity was studied from the inhibitory effect of each extract for Escherichia coli, Staphylococcus aureus, Salmonella typhi and S. paratyphi, and by the Minimum Bactericidal Concentration, the percentage of activity and the Index of Bacterial Susceptibility of each extract. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibacterial activity; Hamelia patens; Polyphenols; HPLC-MS.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000300656

Influence of phenolic compounds on the growth and arginine deiminase system in a wine lactic acid bacterium
Provedor de dados: 58
Autores: Alberto,María R.; Manca de Nadra,María C.; Arena,Mario E.
The influence of seven phenolic compounds, normally present in wine, on the growth and arginine deiminase system (ADI) of Lactobacillus hilgardii X1B, a wine lactic acid bacterium, was established. This system provides energy for bacterial growth and produces citrulline that reacts with ethanol forming the carcinogen ethyl carbamate (EC), found in some wines. The influence of phenolic compounds on bacterial growth was compound dependent. Growth and final pH values increased in presence of arginine. Arginine consumption decreased in presence of protocatechuic and gallic acids (31 and 17%, respectively) and increased in presence of quercetin, rutin, catechin and the caffeic and vanillic phenolic acids (between 10 and 13%, respectively). ADI enzyme activities...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polyphenols; Arginine; Lactobacillus hilgardii.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100018

Nephroprotective activity of the enriched polyphenol extract of Euterpe edulis Martius
Provedor de dados: 60
Autores: Cardoso,Priscylla Maria Martins; Mazuco,Renata Alves; Macedo,Lucas Soares Dazzi; Polese,Ariele Abreu Venturini; Barroso,Maria Eduarda de Souza; Baratella,Waléria Gramilich; Andrade,Tadeu Uggere de; Lenz,Dominik; Pereira,Thiago de Melo Costa; Endringer,Denise Coutinho.
Contrast-induced nephropathy (NIC) is directly related to increased morbidity and mortality, and its treatment and prevention might be achieved by the administration of antioxidant products. The juçara palmetto (Euterpe edulis Martius) has fruits rich in phenolic compounds, which are known for their antioxidant activity. This work aimed to evaluate the nephroprotective activity of E. edulis pulp in the NIC animal model. The collected fruits were pulped, their contents of polyphenols and anthocyanins were quantified, and their antioxidant activity were evaluated. The nephroprotective effects were determined based on iodine contrast induction and evaluated by biochemical and histological analyses. The results showed that E. edulis pulp was rich in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nephroprotection; Euterpe edulis Martius; Polyphenols; Anthocyanins; Antioxidant activity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100522

In vitro antifungal activity and phytochemical characterization of Eugenia uniflora, Libidibia ferrea and Psidium guajava
Provedor de dados: 60
Autores: Ferreira,Magda Rhayanny Assunção; Santiago,Rosilene Rodrigues; Silva-Rocha,Walicyranison Plínio; Souza,Luanda Barbara Ferreira Canário de; Faria,Maria Graciela Icher; Mello,João Carlos Palazzo de; Langassner,Silvana Maria Zucolotto; Chaves,Guilherme Maranhão; Milan,Eveline Pipolo; Svidzinski,Terezinha Inez Estivalet; Soares,Luiz Alberto Lira.
The aim of this study was evaluate the in vitro antifungal activity of crude extracts from Eugenia uniflora, Libidibia ferrea and Psidium guajava. The extracts were obtained by turbo-extraction using water (AQ) or acetone-water (AC-W) (7:3, v/v) as solvents and lyophilized to obtain the crude extracts (CE). The CE were characterized by UV-Vis, TLC and HPLC. The activity of CEs was investigated against clinical isolates of Candida spp. and the Minimum Inhibitory Concentration (MIC), MIC50 and MIC90 were determinated. The analysis by TLC showed that all CEs presented polyphenols (flavonoids and tannins). The CEs from E. uniflora showed higher amount of polyphenols (30.35 ± 2.15%, AC-W) and the HPLC analysis revealed the tannins in all extracts. The CEs of E....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medicinal plants; Herbal extracts; Polyphenols; Candida isolates; Oral candidiasis.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100608

Inhibition of LDL-oxidation and antioxidant properties related to polyphenol content of hydrophilic fractions from seaweed Halimeda Incrassata (Ellis) Lamouroux
Provedor de dados: 60
Autores: Costa-Mugica,Ariana; Batista- Gonzalez,Ana Elsa; Mondejar,Diadelis; Soto-López,Yosdel; Brito-Navarro,Victor; Vázquez,Ana Maria; Brömme,Dieter; Zaldívar-Muñoz,Claudina; Vidal-Novoa,Alexis; Silva,Ana Mara de Oliveira e; Mancini-Filho,Jorge.
LDL oxidation and oxidative stress are closely related to atherosclerosis. Therefore, natural antioxidants have been studied as promising candidates. In the present study, the LDL oxidation inhibition activity of bioactive compounds from Halimeda incrassata seaweed. associated to antioxidant capacity, was evaluated in vitro. Experimental work was conducted with lyophilized aqueous extract and phenolic-rich fractions of the seaweed and their effect on LDL oxidation was evaluated using heparin-precipitated LDL (hep-LDL) with exposure to Cu2+ ions and AAPH as the free radical generator. H. incrassata had a protective effect for hep-LDL in both systems and the presence of phenolic compounds contributed to the activity where phenolic-rich fractions showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Halimeda incrassata/antioxidant properties; Antioxidants; Polyphenols; Lipoproteins/oxidation inhibition.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502012000100004

Alginate-pomegranate peels' polyphenols beads: effects of formulation parameters on loading efficiency
Provedor de dados: 60
Autores: 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

Antimicrobial and antibiofilm activities of phenolic compounds extracted from Populus nigra and Populus alba buds (Algeria)
Provedor de dados: 60
Autores: 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

Influence of the Genotype on the Anthocyanin Composition, Antioxidant Capacity and color of Chilean Pomegranate (Punica granatum L.) Juices
Provedor de dados: 117
Autores: Sepúlveda,Elena; Sáenz,Carmen; Peña,Álvaro; Robert,Paz; Bartolomé,Begoña; Gómez-Cordovés,Carmen.
The bioactive compounds content in pomegranate (Punica granatum L.) juice is variable and depends on agronomic factors, genetic and fruit maturity. In Chile, the areas with this crop have increased more than 65% in the last 5 years. This paper aims to determine the phenolic composition, antioxidant capacity and chromatic parameters of juices from eight Chilean pomegranate genotypes (PG2 to PG9), containing red (PG2 to PG6) or pink arils (PG7 to PG9). Color, total polyphenol content (using Folin-Ciocalteu reagent), total anthocyanins (by differences in absorbance at different pHs of the juice) and antioxidant capacity (oxygen-radical absorbance capacity, ORAC) were determined. Anthocyanins were identified and quantify using HPLC-DAD and HPLC/ESI-MS, the...
Tipo: Journal article
Palavras-chave: Polyphenols; Bioactive compounds.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100005

Red wine phenolic composition: the effects of summer pruning and cluster thinning
Provedor de dados: 118
Autores: Cañón,Pablo M; González,Álvaro S; Alcalde,José A; Bordeu,Edmundo.
P.M. Cañon, A.S. González, J.A. Alcalde, and E. Bordeu. 2014. Red wine phenolic composition: the effects of summer pruning and cluster thinning. Cien. Inv. Agr. 41(2): 235-248. The quality of red wine is directly associated with its phenolic composition, which can be controlled using several viticultural techniques that affect the vegetative/productive balance of the plants, such as summer pruning and cluster thinning. However, these techniques may also involve high costs and production losses. This study aimed to evaluate the effects of summer pruning and cluster thinning on the phenolic compositions of grapes and wine over three consecutive seasons. The treatments included long (120 cm shoot length) and short (60 cm shoot length) summer pruning and 50%...
Tipo: Journal article
Palavras-chave: Cluster thinning; Polyphenols; Summer pruning; Vegetative/productive balance; Vitis vinifera L.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000200010

Simple and robust DNA extraction method for the large-scale analysis of genotypes containing high polyphenolic content, such as landracesof Solanum tuberosum and Zea mays
Provedor de dados: 118
Autores: Barra,Macarena; Salazar,Erika; Beltrán,María; Sagredo,Boris.
The extraction of high-quality DNA is essential for studies conducted at the molecular level in species with an abundance of contaminants in their tissues, such as some landraces of potato and maize, in which it is difficult to extract good-quality genomic DNA. Compounds such as polyphenols interfere with the amplification of DNA during polymerase chain reaction (PCR), which makes it difficult to conduct PCR-based studies ofmolecular markers. This article describes a simple and robust protocol for DNA isolation that was applied to potato and maize landraces and resulted in a high DNA concentration with excellent purity and quality. This method is based on the method of Krizman et al. (2006) with some modifications and was tested on potato leaves and young...
Tipo: Journal article
Palavras-chave: Activated charcoal; DNA extraction; Genomic DNA; Polyphenols.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300019

The in vitro antifungal evaluation of a commercial extract of Chilean propolis against six fungi of agricultural importance
Provedor de dados: 118
Autores: Curifuta,Macarena; Vidal,Jorge; Sánchez-Venegas,Jaime; Contreras,Aliro; Salazar,Luis A; Alvear,Marysol.
Propolis has been used for millennia for its antimicrobial and pharmaceutical properties, whereas its use as an agricultural antifungal agent has only recently been assessed. The chemical characteristics of six ethanolic extracts of Chilean propolis (EEP-1 to EEP-6) were evaluated. The total polyphenols ranged between 7.8 and 42.3 mg mL-1 equivalents of a 2:1 pinocembrin: galangin standard, and the total flavonoid contents ranged between 4.0 and 19.7 mg mL-1 equivalents of quercetin. A high-performance liquid chromatographic (HPLC) analysis allowed the identification of caffeic acid, myricetin, quercetin, kaempferol, apigenin, pinocembrin, galangin, caffeic acid phenethyl ester (CAPE) and rutin. The EEP-3 extract was selected for additional studies based...
Tipo: Journal article
Palavras-chave: Alternaria alternata; Antifungal activity; Botrytis cinerea; Flavonoids; Fusarium sp.; Penicillium expansum; Polyphenols; Propolis.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000200011

Total phenolics, flavonoids, tannins and antioxidant activity of lima beans conserved in a Brazilian Genebank
Provedor de dados: 65
Autores: Agostini-Costa,Tânia da Silveira; Teodoro,Ana Flávia Pádua; Alves,Rosa de Belem das Neves; Braga,Leandro Ribeiro; Ribeiro,Ieler Ferreira; Silva,Joseane Padilha; Quintana,Luciane Gomes; Burle,Marília Lobo.
The objective of this study was to characterize for the first time polyphenols and DPPH (2-diphenyl-1-picryhydrazyl radical) antioxidant activity in commonly cultivated accessions of Phaseolus lunatus from an ex situ germplasm collection maintained by Embrapa, in Brazil. Furthermore, the study aimed to detect changes in total polyphenols, total flavonoids and condensed tannin for the same accessions after regeneration in a greenhouse. The results showed the diversity of the lima bean collection for phenolic compounds, which were strongly correlated with antioxidant activity. Lima beans accessions with the highest polyphenols and antioxidant activity were those with colored seeds. Conservation through cold storage of P. lunatus seeds in a cold chamber in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus lunatus; Genetic resources; Germplasm collection; Leguminosae; Polyphenols.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200335

Composition of polyphenols of asparagus spears (Asparagus officinalis) and their antioxidant potential
Provedor de dados: 65
Autores: Kobus-Cisowska,Joanna; Szymanowska,Daria; Szczepaniak,Oskar Marek; Gramza-Michałowska,Anna; Kmiecik,Dominik; Kulczyński,Bartosz; Szulc,Piotr; Górnaś,Paweł.
ABSTRACT:  The aim of this study was to examine the impact of cultivar and spear color on the composition of polyphenols in asparagus spears (Asparagus officinalis). The five genotypes (Schwetzinger Meisterschuss, Huchel’s Alpha, Gijnlim, Grolim and Eposs) and three growing conditions of asparagus spears (Asparagus officinalis) were investigated. The polyphenols were determined by applying the HPLC-DAD system. The obtained results were subjected to the principal component analysis. Among the analyzed asparagus samples cv. Grolim contained the highest amounts of phenolic acids and flavonols. The varied quantitative and qualitative composition of polyphenolics resulted most probably from changes occurring during vegetation, such as a lack of access to light...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Asparagus cultivars; Antioxidative activity; Flavonols; Phenolic acids; Polyphenols.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400751

Grumixama (Eugenia brasiliensis Lam.) cultivated in the Cerrado has high content of bioactive compounds and great antioxidant potential
Provedor de dados: 65
Autores: Xu,KaWai; Alves-Santos,Aline Medeiros; Dias,Tiago; Naves,Maria Margareth Veloso.
ABSTRACT: Grumixama (Eugenia brasiliensis Lam.) is a Brazilian berry native to the Atlantic Rainforest. Information on nutritional and bioactive profiles of the fruit cultivated in the Brazilian Savannah (Cerrado) is not available in literature. The aim of this study was to investigate the physical and proximate composition; mineral, total phenolics, total tannins and total carotenoids contents; and antioxidant capacity (DPPH and FRAP assays) of the dark purple grumixama cultivated in the Cerrado area (Goiás State). Results showed a similar physical and proximate composition to those of grumixama native to the Atlantic Rainforest. However, grumixama from Cerrado presented the highest dietary fiber and magnesium contents. In addition, the Cerrado grumixama...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eugenia brasiliensis Lam.; Nutrients; Bioactive compounds; Polyphenols; Antioxidant activity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400752

Flavonoids and their aromatic derivatives in Piper betle powder promote in vitro methane mitigation in a variety of diets
Provedor de dados: 64
Autores: Purba,Rayudika Aprilia Patindra; Paengkoum,Siwaporn; Yuangklang,Chalermpon; Paengkoum,Pramote.
ABSTRACT At present, there is little information regarding whether supplementation with Piper betle powder (PBP) and sunflower oil (SFO) has a synergistic effect on lowering methane emissions without negatively impacting ruminal fermentation. This study investigated the effects of PBP, supplemented either with or without SFO, on biogas release, fermentation end-products, and microorganisms in the rumen of lactating goats. The treatments were run in a completely randomized 3 × 5 factorial arrangement, whereby 0, 15, and 30 mg SFO were combined with 0, 15, 30, 45, and 60 mg PBP on a dry matter basis. The outcomes were assessed in vitro. PBP was obtained from the perennial plant Piper betle L., which is an abundant source of flavonoids and their aromatic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environment; Feed utilization; Fermentation; Methane reduction potential; Polyphenols.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100300

Scale-up in the synthesis of nanoparticles for encapsulation of agroindustrial active principles
Provedor de dados: 64
Autores: Duarte,Dirliane Santos; Nascimento,José Augusto de Almeida; Britto,Douglas de.
ABSTRACT Given the potentiality of nanoparticles (NP) to load substances as active principle of drugs, cosmetics and food, there is interest in increasing its production. Particularly in the agroindustrial area, the byproducts are source of functional compounds that must be stabilized by encapsulation, for example, to allow its application. Considering the amount of generated byproducts, it is necessary to understand the encapsulation synthesis in a high scale dimension. In this way, the active compounds vitamin C (from the byproduct of the acerola processing) and polyphenols (from the byproduct of grape processing) were nanoencapsulated into chitosan NP at three reactional volumes: 0.1; 1.0 and 10.0 dm3. The NP were characterized for yield, particle size,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitamin C; Polyphenols; Byproduct; Chitosan.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100406

Bioactive compounds and total antioxidant capacity of cashew apples (Anacardium occidentale L.) during the ripening of early dwarf cashew clones
Provedor de dados: 64
Autores: Lopes,Mônica Maria de Almeida; Miranda,Maria Raquel Alcântara de; Moura,Carlos Farley Herbster; Enéas Filho,Joaquim.
Lately, tropical fruit consumption has increased due to a higher knowledge of its nutritional and therapeutic value. The aim of this work was to evaluate the antioxidant potential of cashew apples from different early dwarf clones during their ripening. The clones analyzed included: CCP 76, CCP 09, BRS 189 and BRS 265 in seven ripening stages. They were analyzed for vitamin C, total carotenoid, total anthocyanin, yellow flavonoids and polyphenol content and total antioxidant capacity. Clone BRS 265 ripe cashew apple presented the highest vitamin C content (279.37 mg x 100 g-1). The ripe BRS 189 cashew apple is colored bright red, and its total anthocyanin content was the highest (21.16 mg x 100 g-1). The yellow flavonoids content was higher for ripe CCP 76...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polyphenols; ABTS; Vitamin C; Carotenoids; Food analysis.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000300008