Polyphenolic Compounds
Mostrando 1-12 de 42 artigos, teses e dissertações.
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1. Green Extraction Optimization of Bioactive Compounds from Rosemary (Rosmarinus officinalis L.) Using Response Surface Methodology
Rosemary (Rosmarinus officinalis L.) is known for its bioactive compounds with high antioxidant potential and pharmacological properties, such as antibacterial, antidepressant and anti-inflammatory. These properties are attributed to the presence of (poly)phenolic compounds. In the literature there is no extraction of these compounds with a totally non-toxic
J. Braz. Chem. Soc.. Publicado em: 2020-12
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2. One-Step Isolation of Monoterpene Indole Alkaloids from Psychotria leiocarpa Leaves and Their Antiviral Activity on Dengue Virus Type-2
The leaf MeOH extract of Psychotria leiocarpa (Rubiaceae) showed in vitro non-cytotoxic and anti-dengue virus serotype 2 (DENV2) activity in human hepatocarcinoma cell lineage (HepG2). A one-step and cost-effective reversed-phase solid-phase extraction method based on high-performance liquid chromatography (HPLC) parameters allowed the isolation, directly fr
J. Braz. Chem. Soc.. Publicado em: 2020-10
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3. Antioxidant potential of various solvent extract from Morus alba fruits and its major polyphenols composition
RESUMO: As condições de extração são um fator importante no processo de obtenção de compostos bioativos da matriz vegetal. Estes compostos diferem-se estruturalmente. As estruturas de fito conjugações e suas interações com outros ingredientes alimentares não são totalmente conhecidas, enquanto esses dois aspectos devem desempenhar um papel sign
Cienc. Rural. Publicado em: 13/12/2019
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4. Potential of some autochthonous wild plants of Burundi for vegetable oil and valuable compounds production
Resumo Doze espécies de plantas indígenas foram estudadas para valorizar alguns recursos naturais do Burundi (África Oriental), para investigar as possibilidades de produção de óleo vegetal. As propriedades físico-químicas e o conteúdo de óleo foram determinados com base em sementes colhidas em cinco zonas ecogeográficas. A partir de extratos de b
Braz. J. Biol.. Publicado em: 02/12/2019
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5. Propolis polyphenolic compounds affect the viability and structure of Helicobacter pylori in vitro
ABSTRACT To evaluate the anti-Helicobacter pylori activity of the major polyphenol compounds of propolis and their cellular damage, both as single molecule or in combination. Honey bees propolis were fractionated by using CPC and preparative HPLC. Four major polyphenols (chrysin, pinocembrin, galangin and caffeic acid phenethyl ester) were identified by thin
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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6. Chemical composition of propolis extract and its effects on epirubicin-induced hepatotoxicity in rats
ABSTRACT Propolis is a natural substance, produced by honeybees from the resin of various plants. The purpose of this study was to determine the chemical composition and evaluate the hepatoprotective effect of ethyl acetate extract of propolis from Tigzirt, against the toxicity induced by epirubicin which is a anticancer agent, and belongs to the family of a
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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7. Effect of Harpin protein as an elicitor on the content of phenolic compounds and antioxidant capacity in two hydroponically grown lettuce (Lactuca sativa L.) varieties.
Abstract Harpin protein was used as an elicitor in green (butterhead) and red (oak leaf type) varieties of hydroponically grown lettuce (Lactuca sativa L.). Its impact on polyphenolic content and antioxidant capacity was evaluated. Harpin protein was sprayed three days before harvesting in concentrations of 45, 60, and 120 mg/L. Green lettuce samples showed
Food Sci. Technol. Publicado em: 13/12/2018
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8. Phenolic compounds, total antioxidant capacity and volatile components of Cabernet Sauvignon red wines from five different wine-producing regions in China
Abstract The purpose of this study was to elucidate the influence of terroir on the polyphenolic compounds, total antioxidant and aroma components of Cabernet Sauvignon red wines from five different wine-producing regions in China. The results obtained showed that the phenols concentrations and total antioxidant capacities from new wine 1 (NW1) were signifi
Food Sci. Technol. Publicado em: 29/11/2018
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9. Antihypoxic activities of Crataegus pentaegyn and Crataegus microphylla fruits-an in vivo assay
ABSTRACT The aim of this study was to evaluate anti-hypoxia activity of polyphenolic extracts of Crataegus microphylla and Crataegus pentaegyn on mice. Three experimental models of hypoxia were considered, including asphyctic hypoxia, haemic hypoxia, and circulatory hypoxia. Polyphenolic extract of both plants exhibited significant anti-hypoxic activity and
Braz. J. Pharm. Sci.. Publicado em: 26/07/2018
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10. Anti-inflammatory and antioxidant activities of the Impatiens noli-tangere and Stachys officinalis polyphenolic-rich extracts
ABSTRACT This study evaluated the anti-inflammatory and antioxidant activities of Impatiens noli-tangere L., Balsaminaceae, and of Stachys officinalis L., Lamiaceae, polyphenolic-rich extracts obtained by nanofiltration process. Results showed the great potential and efficiency of the nanofiltration process to concentrate the herbal extract's main polyphenol
Rev. bras. farmacogn.. Publicado em: 2018-01
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11. The role of condensed tannins in ruminant animal production: advances, limitations and future directions
ABSTRACT Tannins represent one of the most abundant polyphenolic compounds in plants. Tannins exist as a multitude of chemically unique entities in nature. The most commonly occurring tannins are typically divided into two major classes based on chemical structure: hydrolysable (HT) or condensed tannins (CT). Hydrolysable tannins are esters of gallic or ella
R. Bras. Zootec.. Publicado em: 2017-12
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12. Yerba Mate Tea Extract: a Green Approach for the Synthesis of Silica Supported Iron Nanoparticles for Dye Degradation
This work describes a green approach to the synthesis of iron nanoparticles supported in silica using tea extract of the South American plant yerba mate (Ilex paraguariensis). Catalysts with different iron contents were obtained according to the reaction conditions employed. Characterization by X-ray powder diffraction (XRD) and scanning electron microscopy
J. Braz. Chem. Soc.. Publicado em: 2016-11