Pereskia aculeata Miller, popularly known in Brazil as ora-pro-nóbis (OPN), is considered an unconventional food plant (UFP); for being rich in bioactive compounds it is commonly used in disease treatment and supplementation. The aim of this study was to determine the in vitro antioxidant activity (IC50(DPPH)), total phenolic content (TPC) and total flavonoid content (TFC) of teas (aqueous extracts) produced from the flour of Pereskia aculeata Miller stems, evaluating the influence of freezing storage at these parameters. The results presented in this study are unprecedented in the literature. The mean values found for IC50(DPPH), TPC and TFC were (589.34 ± 69.48 μg mL-1); (86.06 ± 16.37 mg AGE g-1) and (13.18 ± 3.56 mg RE g-1), respectively. These phenolic compounds appear to play a major role in the moderate antioxidant potential of this type of tea. Freezing the extracts over a period of three weeks did not produce statistically significant changes in the above mentioned parameters. However, storage of this tea for a longer period is likely to cause such changes.
Several scientific studies have revealed pharmacological properties associated with species of the genus Pereskia. However, so far, little is known about the chemical composition of the essential oils of plants of this genus. Thus, this study sought to carry out a bibliometric and bibliographic review on the scientific production related to the chemical composition of the essential oils of these plants. The information used in this study was obtained from different databases available online. Using specific descriptors, along with the PRISMA methodology, three scientific studies were selected (two articles and one dissertation). The oxygenated diterpene known as phytol proved to be one of the major components of the essential oils of both species of this genus: P. grandifolia and P. aculeata. Manool oxide was considered the component with the highest concentration in the essential oil of P. grandifolia, while the contents of linoleic acid and acarone stood out in the essential oils of P. aculeata. It was possible to evaluate the grouping of samples of the genus Pereskia, based on the chemical composition of its essential oils, with the aid of the multivariate analysis tool known as ACP (Principal Component Analysis).
O conhecimento sobre a diversidade da flora brasileira com potencial alimentício, com destaque para as Plantas Alimentícias Não Convencionais (PANCs), é importante para ampliarmos as opções de alimentos saudáveis para uma população em contínuo crescimento. Dentre as PANCs nativas do Brasil, a ora-pro-nóbis (OPN) vem ganhando espaço na pesquisa científica e no mercado consumidor por seu potencial nutritivo e funcional. Em função do seu alcance público, o uso de redes sociais como o Instagram é interessante para avaliar mercados, divulgar, popularizar e esclarecer dúvidas, por exemplo, com relação à segurança do consumo desses novos produtos. Este estudo utilizou a ferramenta Stories com o objetivo de avaliar o conhecimento dos usuários do Instagram sobre PANCs e, mais especificamente, sobre OPN. Um total de 10 perguntas (objetivas e discursivas) foi disponibilizado no Instagram Stories ao longo de 24 horas. Os dados foram analisados de acordo com o engajamento do público e com relação à frequência simples e relativa das respostas. Os maiores engajamentos obtidos foram na pergunta sobre consumo (27,20%) e conhecimento (26,67%) de OPN. A maior frequência de respostas positivas (87,56%) foi obtida na pergunta que questionava se o indivíduo consumiria produtos derivados de OPN e a maior frequência de respostas negativas (84,81%) foi obtida na pergunta sobre a utilização de PANC na alimentação. O público alcançado demonstrou conhecimento e experiência no consumo de folhas de OPN, sendo que seu potencial proteico foi considerado a característica mais atrativa desse tipo de alimento. Apesar da pouca utilização de PANCs na alimentação, o público consultado mostrou interesse em consumir a farinha e outros produtos de OPN.
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