Results: 85

Extraction and separation of tea polyphenols and caffeine from tea leaves by mechanochemical pretreatment

Mechanochemical pretreatment (MCPT) was applied to the extraction and separation of tea polyphenols (TP) and caffeine from tea leaves. Tea leaves were treated by mechanical activation with presence of Na2CO3(MC) for 75 s. One gram of obtained powder was taken for extraction and s...

Antioxidant, antimicrobial and antiproliferative activities of alcoholic extracts from Piper aequale Vahl leaves

Piper is a large plant genus containing essential oils rich in mono and sesquiterpenes and other secondary metabolites showing different biological activities. Piper aequale, cordoncillo, is used in México for urinary and prostate ailments, suggesting a potential therapeutic effect against pro...

Propagación in vitrode Anredera vesicaria

Anredera vesicaria is a plant whit high anti-inflammatory activity. The work objective was to establish in vitro propagation of A. vesicaria. Nodal segments were used as explants and two disinfection times in 1% sodium hypochlorite (15 and 20 minutes) were evaluated during in vitro establishm...

Chemical composition, antioxidant and antimicrobial activities of Lepechinia rufocampii Epling & Mathias essential oil from the highlands of Ecuador

The chemical composition, antioxidant and antimicrobial activities of the essential oil from leaves and flowers of Lepechinia rufocampii Epling & Mathias were studied. GC-FID and GC-MS analyses allowed the identification and quantification of 122 constituents, representing ...

Chemical composition, antioxidant and antimicrobial activities of essential oil from the aerial parts of Chuquiraga arcuataHarling grown in the highlands of Ecuador

Thechemical composition, antioxidant and antimicrobial activities of the essential oil from aerial parts (leaves and flowers) of Chuquiraga arcuataHarling grown in the Ecuadorian Andes were studied. One hundred and twenty-six compounds were identified in the essential oil...

Valorization of Campomanesia xanthocarpa leaves: chemical composition and antioxidant activity of crude extract and fractions

Campomanesia xanthocarpa leaves are a byproduct of fruit production without studies on antioxidant activity. Thus, this study aimed to identify the antioxidant compounds of C. xanthocarpaleaves by ultra-high performance liquid chromatography coupled with electrospray...

Cardioprotective effects of Baccharis trimera (Less) DC in a rodent model of hookah, alcohol, and energy drink exposure

This study proposes an unpreceded model of cardiovascular disease by combining alcohol and energy drink intake with hookah smoking to investigate the cardiovascular effects of Baccharis trimera (Less.) DC., a medicinal plant used to treat dyslipidemia. For 10 weeks, Wistar rats (n=8) re...

Estudo do potencial antiviral sobre Sars Cov-2 dos compostos identificados nas folhas do extrato bruto de Eugenia pyriformis

Eugenia pyriformis Cambess (Myrtaceae), conhecida popularmente como uvaia. Em seus frutos são encontrados compostos fenólicos com ação antioxidante e nas folhas foram detectados altos teores de flavonoides e taninos hidrolisados que se mostraram inibidor da protease de 2019 - nCoV e SARS-CoV. Neste s...

Análisis fitoquímico preliminar y actividad antifúngica In vitro del extracto etanólico de las hojas de Solanum hispidum pers. Colectadas en la localidad Obraje - Perú

RESUMEN Objetivo . Analizar y determinar la actividad antifúngica in vitro del extracto etanólico de las hojas de Solanum hispidum Pers. Materiales y métodos . Se realizó el análisis fitoquímico preliminar cualitativo mediante reacciones de color y precipitación. Se investigó la actividad antif...

Chemical characterization, antioxidant activity, -amylase and acetylcholinesterase inhibitory potential of Angelica pancicii Vandas ex Velen

Abstract: Comparative study GC - FID /M S of essential oils of fruits, leaves and roots of the endemic plant Angelica pancicii Vandas ex Velen. revealed a significant difference in their chemical composition. The enantiomeric purity of the main component in the fruit oil (+) - β - phellandr...