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Antiga "Base Digital de Teses e Dissertações da UFES" usada na força tarefa 2024

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    Análises das atividades biológicas e da composição química de extratos etanólicos dos frutos de diferentes grupos genômicos de bananas (cavendish, Gros Michel e Terra) sob déficit hídrico
    (Universidade Federal do Espírito Santo, 2021-12-17) Pereira, Paula Roberta Costalonga; Batitucci, Maria Do Carmo Pimentel; https://orcid.org/0000-0002-3485-4448; http://lattes.cnpq.br/0010148251489155; https://orcid.org/0000000341569132; http://lattes.cnpq.br/6840307070705456; França, Hildegardo Seibert; https://orcid.org/0000-0001-6129-8793; http://lattes.cnpq.br/1284874997224988; Dutra, Jean Carlos Vencioneck; https://orcid.org/0000-0003-3893-9470; http://lattes.cnpq.br/4101176432227035
    The banana, Musa spp., is cultivated in practically all tropical countries, due to its requirement of constant heat and high humidity. Its study has high social relevance, especially for locations where socioeconomic development also takes place through agricultural activity, such as in Brazil. However, in view of the growing global demand and increasing consumption requirements, choosing the most appropriate cultivar for a given environment and production system is of great importance to obtain good productivity. Thus, the present study aimed to compare the phytochemical aspects and biological activities of ethanol extracts from the peel and pulp of four genotypes of banana in stage 3 of maturation, two commercial cultivars (Terrinha and Grand Naine) and two new cultivars (Red Yade and Ambrosia) selected by INCAPER, under different irrigation conditions. For this, the quantification of the total contents of phenolic compounds, flavonoids and tannins was carried out, and the evaluation of antioxidant activities was carried out using the ABTS, DPPH and Fe2+ ion chelating methods. The phytochemical analyzes revealed that, in general, the peel extracts of banana cultivars concentrated higher levels of phenolic compounds, and the drought condition was an inducer of compound accumulation. With emphasis on the cultivar Terrinha, which presented the highest values of phenols, flavonoids and total tannins. Regarding the antioxidant potential, the peel extracts showed better activities, demonstrating that the presence of bioactive compounds influenced better responses of these extracts in the antioxidant action. These results indicate that banana peel is a potential natural source of bioactive compounds that can be an alternative to nutraceutical or pharmacological resources.
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    Avaliação da composição química e de atividades antioxidantes de extratos etanólicos de Moringa Oleifera Lam. em diferentes estádios de desenvolvimento
    (Universidade Federal do Espírito Santo, 2021-12-20) Santos, Vanessa Silva dos; Batitucci, Maria do Carmo Pimentel; https://orcid.org/0000-0002-3485-4448; http://lattes.cnpq.br/0010148251489155; http://lattes.cnpq.br/6922562250277052; Delarmelina, Juliana Macedo; https://orcid.org/0000-0003-2429-1044; http://lattes.cnpq.br/0363405067711009; França, Hildegardo Seibert; https://orcid.org/0000-0001-6129-8793; http://lattes.cnpq.br/1284874997224988; Dutra, Jean Carlos Vencioneck; https://orcid.org/0000-0003-3893-9470; http://lattes.cnpq.br/4101176432227035
    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).