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| Registros recuperados: 68 | |
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| Peres,Marize Terezinha Lopes Pereira; Lopes,José Rodrigo Regis; Silva,Cristiane Bezerra da; Cândido,Ana Carina Silva; Simionatto,Euclésio; Cabral,Márcia Regina Pereira; Oliveira,Rita Machado; Facco,Janaina Thomasi; Cardoso,Cláudia Andréa Lima; Simas,Pedro Henrique. |
| We investigated antioxidant capacity, phenolic content and phytotoxic effects in seven species of fruit native to Brazil: Acrocomia aculeata, Hymenaea stigonocarpa, Tamarindus indica, Byrsonima intermedia, Psidium firmum, Myrciaria cauliflora and Ficus obtusifolia. Phytotoxic effects were assessed from crude ethanol extracts and semipurified fractions. In four of the seven fruits, total phenolic content, as determined by Folin-Ciocalteu assay, was higher in the peel than in the pulp. We found that total phenolic content correlated significantly with antioxidant capacity. High-performance liquid chromatography with diode array detection revealed the presence of the flavonoids quercetin and rutin in some fruits. We also evaluated the allelopathic effects of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Fruit; Phytotoxic effects; Antioxidant capacity; Total phenolic content. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400024 |
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| Rosales-Reynoso,O. Lidia; Agama-Acevedo,Edith; Aguirre-Cruz,Andres; Bello-Perez,Luis A.; Dufour,Dominique; Gibert,Olivier. |
| In México, banana (Musa sp.) varieties ate used for human consumption as well as for traditional medicine, but the literature lacks information on local diversity and functional justification for their use. Three varieties of dessert bananas (Valery, Morado, and Enano) and one cooking banana (Macho) were collected in a commercial farm in Tuxtepec, Oaxaca, México, at the agronomic maturity stage, and they were physically and chemically evaluated. A random sampling, ANOVA, and Tukey tests were used. As compared to the dessert bananas, the cooking banana (Macho) showed a lower number of hands per banana bunch (6) and of fingers per hands (6), one of the smallest bunch yields (about 12.4 kg), a higher average finger weight (349 g), length (31.7 cm), girth (17... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Musa sp.; Starch properties; Polyphenol; Antioxidant capacity. |
| Ano: 2014 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952014000400004 |
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| PIANA,MARIANA; BOLIGON,ALINE A.; BRUM,THIELE F. DE; ZADRA,MARINA; BELKE,BIANCA V.; FROEDER,AMANDA L.F.; FROHLICH,JANAÍNA K.; NUNES,LETÍCIA T.; PAPPIS,LAUREN; BOLIGON,ALEXANDRA A.; ATHAYDE,MARGARETH L.. |
| The antioxidant capacity of the crude extract and fractions ofTabernaemontana catharinensis fruits and branches, was evaluated by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method and the content of polyphenols, flavonoids, alkaloids and condensed tannins were determined by the spectrophotometric method. The ethyl acetate fraction of the fruits and the n-butanol fraction of the branches showed IC50 of 181.82 µg/mL and 78.19 µg/mL, respectively. All fractions were analyzed by high performance liquid chromatography (HPLC), in the branches were quantified chlorogenic acid in the chloroform (8.96 mg/g), ethyl acetate (4.31 mg/g) and n-butanol (3.33 mg/g) fractions; caffeic acid in the ethyl acetate (5.24 mg/g) and n-butanol (1.81 mg/g); gallic acid (0.52 mg/g)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant capacity; Apocynaceae; Chlorogenic acid; Tabernaemontana catharinensis. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200881 |
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| Hegedüs,Attila; Pfeiffer,Péter; Papp,Nóra; Abrankó,László; Blázovics,Anna; Pedryc,Andrzej; Stefanovits-Bányai,Éva. |
| Two apricot genotypes, 'Gonci magyarkajszi' and 'Preventa' were assayed at three ripening stages for flesh color indices (L*, a*, b*, C* and Hº), contents of total phenolics and vitamin C, and both water- and lipid-soluble antioxidant capacities (ferric reducing antioxidant power; 2,2'-diphenyl-1-picrylhydrazyl scavenging activity; total radical scavenging activity; and Photochem lipid-soluble antioxidant capacity) to compare their dynamics in the accumulation of antioxidant compounds and capacities through ripening. The increase in a*, b* and C* and decrease in Hº during ripening represented a color shift from green to yellow and orange due to carotenoid accumulation. Parallel to carotenoid accumulation, contents of total phenolics and vitamin C and... |
| Tipo: Journal article |
Palavras-chave: Antioxidant capacity; Apricot; Color; Ripening; Total polyphenolic content; Vitamin C. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000400004 |
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| Carneiro,Nárgella Silva; Alves,Cássia Cristina Fernandes; Cagnin,Caroline; Belisario,Celso Martins; Silva,Marco Antônio Pereira da; Miranda,Mayker Lazaro Dantas; Oliveira Filho,Josemar Gonçalves de; Alves,José Milton; Pereira,Paulo Sérgio; Silva,Fabiano Guimarães; Egea,Mariana Buranelo. |
| Abstract: The Cerrado is one of the world's biodiversity hotspots and Brazil’s second largest biome. Many native species of the Brazilian Cerrado provide fruits that have unique sensory characteristics and high nutritional value. This study aimed at characterizing the pulp of Eugenia klotzschiana O. Berg, concerning its proximal composition, bioactive compound content and antioxidant activity. The pulp under study had high moisture (89.47 g kg-1) and caloric (96.07 kcal kg-1) values whereas its contents of protein (0.59 g kg-1) and lipids (2.35 g kg-1) were low. The cerrado pear pulp also had high iron content (16.5 mg kg -1) and dietary fiber (6.45 g kg-1), besides 0.034-0,055 mg kg-1 carotenoids, 8.66 mg kg-1 ascorbic acid and 0.66 mg kg-1 total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado pear; Nutrients; Flavonoids; Antioxidant capacity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100402 |
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| Mandelli,Fernanda; Yamashita,Fábio; Pereira,José L.; Mercadante,Adriana Z.. |
| A fractional factorial design 2(5-1) was used to evaluate the effect of temperature, pH, and concentrations of yeast extract, tryptone and Nitsch's trace elements on the biomass, total carotenoids and protection against singlet oxygen by carotenoid extracts of the bacterium Thermus filiformis. In addition, the carotenoid composition was determined by high-performance liquid chromatography connected to a diode array and mass spectrometer detectors (HPLC-DAD-MS/MS). The production of biomass ranged from 0.113 to 0.658 g/L, the total carotenoid from 137.6 to 1,517.4 mg/g and the protection against singlet oxygen from 4.3 to 85.1 %. Results of the fractional factorial design showed that temperature had a negative effect on biomass production and a positive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermophile bacterium; Carotenoids; HPLC-DAD-MS/MS; Antioxidant capacity; Factorial design. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100014 |
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| Tajalli,Faezeh; Malekzadeh,Khalil; Soltanian,Hadi; Janpoor,Javad; Rezaeian,Sharareh; Pourianfar,Hamid R.. |
| The white button mushroom, Agaricus bisporus, is the most commonly grown mushroom in Iran; however, there is a significant shortage of research on its antioxidant activity and other medicinal properties. The aim of this study was to evaluate antioxidant capacity of the methanolic extracts from four cultivated strains and four Internal Transcribed Spacer (ITS)-identified, Iranian wild isolates of A. bisporus. Evaluations were made for total phenols, flavonoids and anthocyanins, and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity. Overall, results showed that all the wild isolates exhibited significantly lower DPPH-derived EC50, compared to the cultivated strains (p < 0.05). A relatively high relationship was observed between total phenols and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agaricus bisporus; Antioxidant capacity; Wild mushrooms; Methanolic extract; Anthocyanins. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300769 |
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| Torki,Akram; Khalaji-Pirbalouty,Valiallah; Lorigooini,Zahra; Rafieian-Kopaei,Mahmoud; Sadeghimanesh,Arezo; Rabiei,Zahra. |
| Abstract Stroke is the third leading cause of mortality and disability in industrial countries. Treatment with herbs with antioxidant properties has been reported to be an alternative to the conventional treatments. This study was conducted to investigate the effect of Anchusa italica extract on hippocampal injury induced by transient global cerebral ischemia and reperfusion in the rat. To do so, 50 rats were randomly assigned to five groups; control, sham, ischemia, and 50 or 100 mg/kg of Anchusa italica treated animals. Ischemia was induced by occlusion of carotid artery for 30 minutes. Afterward, behavioral tests and biochemical analyses were conducted. Induction of ischemia/reperfusion caused a decline in learning and passive avoidance memory in rats.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Boraginaceae/phytochemistry; Brain ischemia; Spatial memory/drug effects; Malondialdehyde/pharmacology; Neuroprotection/drug effects; Lipidic peroxidation/drug effects; Antioxidant capacity; Passive avoidance memory.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502018000100613 |
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| Betim,Fernando Cesar Martins; Oliveira,Camila Freitas de; Souza,Angela Maria de; Szabo,Ellis Marina; Zanin,Sandra Maria Warumby; Miguel,Obdulio Gomes; Miguel,Marilis Dallarmi; Dias,Josiane de Fátima Gaspari. |
| The present study was undertaken to assess the potential uses of the essential oil obtained from Ocotea nutans (Nees) Mez. The hydrodistilled essential oil from O. nutans leaves was analyzed by gas chromatography-mass spectrometry. Fifty-eight compounds representing 87,29% of the total leaf essential oil components were identified, of which biciclogermacrene(11.41%), germacrene-D (4.89%), bisabolol-11-ol(3.73%) and spathulenol (3.71%) were the major compounds. The essential oil from O. nutans were tested for antibacterial activity using the minimum inhibitory concentracion (MIC) method, Artemia salina method, larvicidal activity in Aedes aegypti, and antioxidant capacity.The antioxidant activity measured by the phosphomolybdenum complex and Prussian blue... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ocoteanutans/essential oil/evaluation; Antioxidant capacity; Aedesaegypti; Toxic potential. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100513 |
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| Zocoler,Analice Martins Daleffi; Sanches,Andréia Cristina Conegero; Albrecht,Ingrid; Mello,João Carlos Palazzo de. |
| The extract from stem bark of Stryphnodendron obovatum Benth. was chromatographed on a Sephadex® LH-20 column, and yielded nine compounds: gallic acid (GA), p-hydroxybenzoic acid (PHB), gallocatechin (GC), epigallocatechin (EPG), 4'-O-methylgallocatechin (MGC), epigallocatechin-(4β→8)-epigallocatechin (EPEP), epigallocatechin-(4β→8)-gallocatechin (EPGC), robinetinidol-(4α→8)-gallocatechin (ROGC) and robinetinidol-(4β→8)-epigallocatechin (ROEP). Evaluation of the antioxidant capacity in vitro by the methods of DPPH free radical (IC50; μg/mL) and reduction of the phosphomolybdenum complex (RAC) gave the following results, respectively: crude extract 4.52 and 0.8242; ethyl-acetate fraction 4.04 and 0.9537; aqueous fraction 5.58 and 0.9275. The crude extract... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stryphnodendron obovatum; Antioxidant capacity; Condensed tannins; DPPH free radical; Phosphomolybdenum complex. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502009000300009 |
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| Vidal J,Leslie; Avello L,Marcia; Loyola C,Cristina; Campos P,Jorge; Aqueveque M,Pedro; R. Dungan,Stephanie; Galotto L,Maria; Guarda M,Abel. |
| Microencapsulation technology is an alternative to stabilize stress factors and protect food ingredients or additives, which include environmentally sensitive bioactive principles in protective matrices to increase their functionality and life span. The objective of this research was to study conditions to obtain microcapsules with antioxidant capacity from a maqui (Aristotelia chilensis [Molina] Stuntz, Elaeocarpaceae) leaf extract by emulsification and subsequent retention after microencapsulation. Microcapsules were produced by water-in-oil emulsion (W/O) using a phase of the aqueous maqui leaf extract and gum arabic, and a liquid vaseline phase. Maqui leaf extract antioxidant capacity was 99.66% compared with the aqueous phase of the emulsion at 94.38... |
| Tipo: Journal article |
Palavras-chave: Maqui; Antioxidant capacity; Bioactive compounds; Gum arabic. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000100003 |
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| Salazar-González,Claudia; Vergara-Balderas,Fidel T; Ortega-Regules,Ana E; Guerrero-Beltrán,José Á. |
| Liquid extracts of dried Roselle (Hibiscus sabdariffa) calyces obtained using ethanol:water (50:50 and 70:30%, v/v), water, ethanol:1.5 N HCl (85:25%, v/v), and ethanol (96%) to evaluate selected antioxidant characteristics (phenolic compounds and antioxidant capacity), color parameters (L, a, and b), and anthocyanins (delphinidin-3-O-sambubioside, delphinidin-3-O-glucoside (myrtillin), and cyanidin-3-O-sambubioside) by high performance liquid chromatography (HPLC). The total monomeric anthocyanin content was also assessed using the differential pH technique. The phenolic compound content ranged from 1,067±22 (in ethanol) to 2,649±96 (in ethanol:water 70:30%) mg of gallic acid100 g-1 of dehydrated calyces, and the antioxidant capacity ranged from 3.11±0.50... |
| Tipo: Journal article |
Palavras-chave: Anthocyanins; Antioxidant capacity; Cyanidin-3-O-sambubioside; Delphinidin-3-O-sambubioside; Delphinidin-3-O-glucoside; Myrtillin; Hibiscus sabdariffa; Roselle calyces. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000100006 |
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| Mariangel,Emilia; Reyes-Diaz,Marjorie; Lobos,Walter; Bensch,Emma; Schalchli,Heidi; Ibarra,Pamela. |
| The antioxidant capacity (AC), total anthocyanins (TA) and total phenols (TP) of calafate fruit from four locations in southern Chile (El Blanco, Lonquimay, Mañihuales and Temuco) were determined using both the free radical 2.2-diphenyl-1-picrylhydrazyl (DPPH) method and the linoleic acid oxidation inhibition method as well as the pH-differential and Folin-Ciocalteu methods. Phenolic compounds were also identified using HPLC-DAD (High Performance Liquid Chromatography-Diode-Array Detection). The results showed that TP varied significantly according to the location. Mañihuales was noteworthy, with 34.9 mg of GAE g-1 dried fruit. The measured AC level depended on the methodology used, varying significantly between locations according to the DPPH results.... |
| Tipo: Journal article |
Palavras-chave: Antioxidants; Antioxidant capacity; Berberis; Flavonoids; Phenolic acids; Total phenols. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100014 |
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| Abe,Lucile Tiemi; Lajolo,Franco Maria; Genovese,Maria Inés. |
| Frequent nut intake is associated with protective effects against cardiovascular diseases. In addition to the generally high contents of unsaturated fatty acids, polyphenol compounds seem to be also implicated in health promoting effects of nuts due to their antioxidant properties. In this way, eleven different kinds of nuts, including pinhao seeds (Araucaria angustifolia) and Brazil nuts (Bertholletia excelsa), typical of Brazil, were analyzed for the content of phenol compounds, including the potent anti-mutagenic and anti-cancer ellagic acid, and antioxidant capacity of methanolic extracts. The antioxidant capacity varied a hundred times among the different nuts, from 1.2 to 120 mg of Trolox equivalents.100 g-1 (FW). Total ellagic acid was determined... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant capacity; Ellagic acid; Phenols; Nuts; Pinhao seeds; Brazil nuts. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000500038 |
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| Registros recuperados: 68 | |
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