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| Registros recuperados: 10 | |
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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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| TOSUN,MURAT; ERCISLI,SEZAI; SENGUL,MEMNUNE; OZER,HAKAN; POLAT,TASKIN; OZTURK,ERDOGAN. |
| Methanolic extracts of eight Salvia species, namely S. aethiopis, S. candidissima, S. limbata, S. microstegia, S. nemorosa, S. pachystachys, S. verticillata, and S. virgata, sampled from Eastern Anatolia in Turkey, were screened for their possible antioxidant activities by two complementary test systems, namely DPPH free radical scavenging and b-carotene/linoleic acid. Total phenolic content of the extracts of Salvia species were performed Folin-Ciocalteu reagent and gallic acid used as standard. A wide variation has been observed among species in terms of antioxidant activity and total phenolic content. In both DPPH and b-carotene system, the most active plant was Salvia verticillata with a value of IC50=18.3 μg/ml and 75.8%, respectively. This... |
| Tipo: Journal article |
Palavras-chave: Sage; Salvia; Total phenolic content. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200005 |
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| Velásquez,Patricia; Sandoval,María Ignacia; Giordano,Ady; Gómez,Miguel; Montenegro,Gloria. |
| Peumus boldus is an endemic Chilean tree whose edible fruit lack a history of scientific research. The aim of this study was to determine its nutritional composition (moisture, ash, crude fiber, proteins, carbohydrates and lipids) and polyphenolic content (total phenolic content, HPLC-DAD, HPLC-MS/MS analysis) at different stages of development. The results show that the fruit decreased in ash, crude fiber and total phenolic content throughout its development, while its carbohydrate and protein content increased. An increase in phenolic molecules such as catechin and epicatechin was also observed. This is the first report on the nutritional composition and phenolic content of Peumus boldus Mol. fruits. |
| Tipo: Journal article |
Palavras-chave: Ash; Crude fiber; Kjeldahl; Goldfish; Phenol-sulfuric method; Total phenolic content. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000100007 |
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| Bridi,Raquel; Lobato,Sergio; López-Alarcón,Camilo; Lissi,Eduardo. |
| In the present work, we studied the effect of the growing region (IV, Metropolitan or VI - VII regions), quality classification ("Varietal", "Reserva", and "Gran Reserva") and harvest year (2000-2012) on the total phenolic content and antioxidant capacity of thirty-six Chilean Cabernet Sauvignon red wine samples. The Folin-Ciocalteu (FC) and (Oxygen Radical Absorbance Capacity) ORAC methods, employing fluorescein and pyrogallol red as probes, were applied to establish the properties of the wine samples. The obtained results show a strong dependence at of the three indexes on the grape growing region, with higher values obtained in wines from the IV region. These results can be related to the climatic characteristics of this Region, which include dry... |
| Tipo: Journal article |
Palavras-chave: Cabernet Sauvignon; Chilean red wines; ORAC; Total phenolic content; Growing region; Quality classification; Harvest year. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000300012 |
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| İZLİ,Gökçen. |
| Abstract Date slices were dried with the three drying methods convective (60, 70 and 80 °C), microwave (120 W) and freeze drying to determine drying characteristics and to compare the dried fruit quality. All colour parameters changed depending on the drying method and colours closest to the fresh sample were obtained with freeze drying. It is interesting to note that the total phenolic content and antioxidant capacity in each sample rose when looked at in relation to the fresh sample. In particular, microwave-dried samples were recorded as having the highest total phenolic content and the highest antioxidant capacity. To explain the drying kinetics of the date slices, nine thin-layer drying models were also attempted. Based on statistical tests, the model... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drying methods; Thin-layer; Date slices; Colour; Total phenolic content. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000100139 |
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| Genovese,Maria Inés; Lannes,Suzana Caetano da Silva. |
| Polyphenolic compounds seem to be related to the health benefits produced by the cocoa due to their antioxidant properties. Cupuassu powder, prepared from Theobroma grandiflorum seeds, is a very promising cocoa powder substitute. In order to assess the potential health benefits of the cupuassu powder, a comparison was performed between cocoa, chocolate, and cupuassu powders in relation to the content of total phenolic compounds, flavonoids and DPPH scavenging capacity of methanolic extracts. Cupuassu "chocolates" (milk, dark, and white) were also analyzed. Mineral, lipid, protein, and moisture determinations were made in cocoa and cupuassu powders and in cupuassu "chocolates". Results showed that the phenolic contents of cocoa and chocolate powders are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DPPH scavenging capacity; Total phenolic content; Cupuassu "chocolate"; Cupuassu and cocoa powders. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612009000400017 |
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| Azadi Gonbad,Reza; Afzan,Adlin; Karimi,Ehsan; Sinniah,Uma Rani; Kumara Swamy,Mallappa. |
| Background Tea (Camellia sinensis), a well-known beverage is consumed frequently worldwide due to its high antioxidant properties. The present study determines the amount of phytochemicals and antioxidant activities among 12 high yielding tea clones cultivated in Iran. Results Among the 12 clones studied, tea clone Iran 100 had the highest total phenolic content and total flavonoid content with values of 8.44 ± 1.03 mg gallic acid equivalents per gram dry weight and 4.50 ± 0.16 mg rutin equivalents per gram dry weight respectively. High performance Liquid Chromatography (HPLC) analysis of phenolics and flavonoids in 12 clones revealed the presence of (+)-catechin, (-)-epicatechin, (-)-epigallocatechin, (-)-epigallocatechin-gallate, (-)-epicatechingallate,... |
| Tipo: Journal article |
Palavras-chave: Camellia sinensis; DPPH assay; Methanolic extract; Total flavonoid content; Total phenolic content. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000600008 |
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| Augusto-Obara,Thalita Riquelme; Oliveira,Jacqueline de; Gloria,Eduardo Micotti da; Spoto,Marta Helena Fillet; Godoy,Karina; Vieira,Thais Maria Ferreira de Souza; Scheuermann,Erick. |
| ABSTRACT: Green propolis is found only in Brazil and due to its important biological characteristics, the food industry views it as a rich source of bioactive compounds. However, an extract must be produced for its application, which is difficult considering the rigid characteristics of raw propolis. Superfine grinding, a process capable of reducing particle size, enables the extraction of most bioactive compounds in propolis. This study evaluated the influence of grinding on size characteristics, antioxidant and antifungal properties of Brazilian green propolis for food preservation. The propolis powder was produced through six different types of grinding (different sieves and rpm), and its quality was evaluated by scanning electron microscopy-energy... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apis mellifera; SEM-EDX; Ultracentrifugal mill; Total phenolic content; Food preservative. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001500398 |
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| Registros recuperados: 10 | |
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