Results: 271

Atividade in vitro de extratos e frações de Copernicia prunifera (Arecaceae) contra bactérias de importância clínica em saúde pública

Introdução: O aumento contínuo da resistência bacteriana aos antibióticos convencionais é um problema de importância global. Encontrar produtos como alternativas terapêuticas naturais é essencial. As plantas medicinais possuem uma composição química muito rica, que podem ser estruturalmente o...

Phytochemical profile, in vitro activities, and toxicity of optimized Eugenia uniflora extracts

In this study, we investigated the influence of mixture design on the chemical profile of Eugenia unifloraleaves, evaluating the antioxidant and antimicrobial activities, the toxic and hemolytic potential, with the focus on the improvement of the polyphenol’s extraction for in...

Antimicrobial, antioxidant activity and phytochemical prospection of Eugenia involucrata DC. leaf extracts

Braz. j. biol; 83 (), 2023
Abstract The species Eugenia involucrata DC. is a plant native to Brazil and is traditionally used for intestinal problems, however, little research has documented about its biological potential and phytochemical profile. Thus, the objective of this study was to carry out preliminary phytochemical prospe...

Chemical characterization, cytotoxicity, antimicrobial and antioxidant potential of Justicia pectoralis Jacq and Croton jacobinensis Baill extracts

Abstract In this research, aqueous and ethanolic extracts from Justicia pectoralis Jacq and Croton Jacobinensis Baill were characterized. The UPLC-QTOF-MSE analysis was performed on the extracts identified, predominantly, flavonoids, tannins and acids. The extracts did not indicate toxicity in human epit...

Phytochemical characterization, antioxidant potential and antibacterial activity of the Croton argyrophylloides Muell. Arg. (Euphorbiaceae)

Braz. j. biol; 83 (), 2023
Abstract Croton argyrophylloides Muell. Arg., from the Euphorbiaceae family, popularly known as marmeleiro prateado or sacatinga, is a plant from the Caatinga biome commonly found in Brazil's northeastern region. The present study aimed to evaluate the antioxidant activity of the species. The phytochemic...

Applicability of an HPLC method for analysis of alcoholic and glycolic Brazilian green-propolis extracts

Abstract Brazilian green propolis has been widely used in food and pharmaceutical products due to its valuable source of phenolic compounds and versatile biological activities. The development and validation of analytical methods are extremely useful for the characterization and quality control of produc...

Phytochemical Analysis and Evaluation of Antifungal and Antioxidant Activities of Essential Oil of Fruits from Juniperus oxycedrus L. Obtained from Morocco

Abstract The present study was aimed at conducting phytochemical analysis and evaluating the in vitro antifungal and antioxidant activities of the essential oil obtained from the fruits of J. oxycedrus L. Hydro-distillation was used to extract the essential oil from the fruits of Juniper oxycedrus. The ...

Efeito do uso de guaraná em pó (Paullinia cupana) sobre a modulação do fator neurotrófico derivado do cérebro e sintomas depressivos em adultos jovens saudáveis

Os polifenóis presentes nos alimentos podem contribuir para promoção e proteção da saúde mental, com a redução dos sintomas depressivos, modulação da inflamação e neuroplasticidade. A saúde mental é um importante problema de saúde pública, pelo seu impacto na qualidade de vida, comprometi...

Determination of phenolic compounds and antioxidant potential of aqueous extracts of Curcuma longa L., Piper nigrum L. and Cuminum cyminum: an experimental and a quantum-mechanical study

Objectives: Evaluation of phenolic compounds and antioxidant activities of aqueous extracts of C. longa, P. nigrum and C. cyminum. In addition to proposing a quantum-mechanical model to evaluate the antioxidant activity. Methods: The aqueous extracts were prepared using roots of the Curcuma longa L., see...