Ferric Reducing Antioxidant Power Frap
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. Evaluation of antioxidant activities, total phenolic content (TPC), and total catechin content (TCC) of 10 sugar apple (Annona squamosa L.) cultivar peels grown in Thailand
Abstract Antioxidant activities, total phenolic content (TPC), and total catechin content were analyzed in the ethanol extracts of 10 sugar apple (Annona squamosa L.) cultivar peels grown in Thailand. Antioxidant activity assays carried out in the this study were the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, ferric ion reducing antio
Food Sci. Technol. Publicado em: 26/04/2018
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14. Fatty acid composition from the marine red algae Pterocladiella capillacea (S. G. Gmelin) Santelices & Hommersand 1997 and Osmundaria obtusiloba (C. Agardh) R. E. Norris 1991 and its antioxidant activity
ABSTRACT This study evaluated the chemical composition and antioxidant activity of fatty acids from the marine red algae Pterocladiella capillacea (S. G. Gmelin) Santelices & Hommersand 1997 and Osmundaria obtusiloba (C. Agardh) R. E. Norris 1991. The gas chromatography mass spectrometry (GC-MS) identified nine fatty acids in the two species. The major fatty
An. Acad. Bras. Ciênc.. Publicado em: 01/02/2018
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15. Processamento e estabilidade de uma bebida de caju e yacon durante o armazenamento sob refrigeração
Resumo O objetivo do presente trabalho foi avaliar a estabilidade de uma bebida de caju e yacon durante o armazenamento sob refrigeração. A bebida, composta por polpa de caju e extrato de yacon (proporção 1:1, v/v), foi pasteurizada a 85 °C por 90 segundos e armazenada sob refrigeração (5 °C). No tempo inicial e a cada 45 dias do período de estocage
Braz. J. Food Technol.. Publicado em: 21/09/2017
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16. Comparative study of functional properties of eight walnut (Juglans regia L.) genotypes
Abstract Eight walnut (Juglans regia L.) genotypes were assessed for the glutathione (GSH) and total phenolic contents (TPC), as well as their antioxidant capacities. The GSH contents were between 1.1 and 7.2 mg 100 g-1. The TPC contents ranged from 33 to 50.3 mg GAE g-1, while the ferric ion reducing antioxidant power (FRAP) values ranged from 156 to 302 mg
Food Sci. Technol. Publicado em: 25/05/2017
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17. Propolis from Southwest of Parana produced by selected bees: Influence of seasonality and food supplementation on antioxidant activity and phenolic profile
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 o
An. Acad. Bras. Ciênc.. Publicado em: 06/02/2017
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18. Optimization of ultrasound-assisted extraction of phenolic compounds, antioxidants and rosmarinic acid from perilla leaves using response surface methodology
Abstract Response surface methodology (RSM) was used to optimize ultrasound-assisted extraction (UAE) of functional components from perilla leaves. The factors investigated were ethanol concentration, extraction temperature, and extraction time. The results revealed that ethanol concentration had significant effects on all extraction parameters. Based on the
Food Sci. Technol. Publicado em: 08/12/2016
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19. Swimming training attenuates oxidative damage and increases enzymatic but not non-enzymatic antioxidant defenses in the rat brain
Although it is well known that physical training ameliorates brain oxidative function after injuries by enhancing the levels of neurotrophic factors and oxidative status, there is little evidence addressing the influence of exercise training itself on brain oxidative damage and data is conflicting. This study investigated the effect of well-established swimm
Braz J Med Biol Res. Publicado em: 29/09/2016
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20. A comparative study on antioxidant activity of different parts of lotus (Nelumbo nuficera Gaertn) rhizome
Abstract In this study, the antioxidant activities of different parts of lotus (Nelumbo nuficera Gaertn) rhizome were compared. The total phenolic content of lotus rhizome was determined, and Ferric reducing antioxidant power (FRAP) assay, 1,1-diphenyl-2-picrylhydrazyl hydrate (DPPH) radical-scavenging assay and β-carotene-linoleic acid assay were performed
Food Sci. Technol. Publicado em: 14/07/2016
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21. Chemical Characterization and Optimization of the Extraction Process of Bioactive Compounds from Propolis Produced by Selected Bees Apis mellifera
The extraction process of bioactive compounds from propolis produced by selected bees was optimized using a 2³ factorial design planning to evaluate the effect of ethanol concentration, time and temperature on the extraction of total phenolic compounds and antioxidant activity. Analysis of total flavonoids, antioxidant activity and chemical characterization
J. Braz. Chem. Soc.. Publicado em: 2015-10
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22. Antioxidant activities and lutein content of 11 marigold cultivars (Tagetes spp.) grown in Thailand
Antioxidant activities and total phenolic content (TPC) were analyzed in ethanol extracts of 11 marigold cultivars grown in Thailand. Antioxidant activity assays performed in this study were the 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical cation scavenging activity, ferric ion reducing antioxidant power (FRAP), 2,2-diphenyl-1-picry
Food Sci. Technol. Publicado em: 2015-04
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23. Compostos fenólicos e capacidade antioxidante em frutos de tomateiros mutantes fotomorfogenéticos
Compostos fenólicos e capacidade antioxidante são mecanismos de defesa das plantas aos danos do estresse oxidativo. Os compostos fenólicos são sintetizados pela via dos fenilpropanoides, cuja enzima chave, fenilalanina amônia liase, é influenciada pela luz e ação de fotorreceptores, como o fitocromo. O objetivo do presente trabalho é avaliar a conce
Cienc. Rural. Publicado em: 10/03/2015
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24. Amora Preta (Rubus spp.): influência do estádio de maturação e do processamento nos teores de compostos fenólicos e atividade antioxidante das variedades 'Brazos' e 'Tupy' cultivadas no Brasil
Algumas frutas de clima temperado e tropical, principalmente as do tipo "berries", têm como característica o acúmulo de compostos antioxidantes e são objeto de inúmeros estudos, haja vista a sua correlação com os benefícios para a saúde humana. Os objetivos deste trabalho foram quantificar as antocianinas, os compostos fenólicos e mensurar a capaci
Cienc. Rural. Publicado em: 06/03/2015