Avaliação da composição química e de atividades antioxidantes de extratos etanólicos de Moringa Oleifera Lam. em diferentes estádios de desenvolvimento
Nenhuma Miniatura disponível
Data
2021-12-20
Autores
Santos, Vanessa Silva dos
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal do Espírito Santo
Resumo
The use of plants for the treatment of diseases has followed the history of human survival for thousands of years. According to the World Health Organization (WHO) it is estimated that a large part of the population of developing countries still uses plants for medicinal purposes, even without proven clinical indication, as an alternative to synthetic drugs in the treatment of various diseases. Moringa oleifera Lam. (Moringaceae), is originally from northwestern India, its cultivation spread throughout the tropics, being found in some countries of the African continent, Asia, and South America. Reactive oxygen species (ROS) can be generated from natural biological events or by exposure to exogenous factors. The imbalance between ROS and antioxidants available in the cell can lead to oxidative stress, responsible for triggering harmful events to the body. One of the most effective ways to maintain balance between free radicals and antioxidant systems is by ingesting synthetic antioxidant compounds trough supplementation or food. However, due to the chemical instability attributed to synthetic antioxidants, there is a growing demand for antioxidants of natural origin, which have low toxicity and fewer adverse effects. Many of the biological activities observed in plant extracts are related to compounds derived from secondary metabolism of plants, which may vary qualitatively and quantitatively depending on the stage of plant development and the parts, like stem and leaves, used. In order to understand the influence of these on the production of phytocompounds and on the biological activities presented by M. oleifera, the present work aims to characterize its antioxidant performance by methods of capture and reduction of ions and metal chelating properties, correlating this performance to the chemical compounds present in this plant with the crude ethanol extracts of M. oleifera in vegetative, flowering and fruiting and its different parts (stem and leaf).
Descrição
Palavras-chave
Radicais livres , fenois , flavonoides , taninos , ABTS , DPPH , Fe2+ Quelante