Livros e capítulo
URI permanente para esta coleçãohttps://rigalileo.itegam.org.br/handle/123456789/6
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Resultados da Pesquisa
Item Potential plastic digestor of Euphorbia Tirucalli(Instituto de Tecnologia e Educação Galileo da Amazônia, 2024) SILVA, Simone da; LEITE, Jandecy CabralNatural products that cause oxidative stress and local corrosion are of interest in the degradation of persistent materials such as plastics. This chapter evaluated the corrosive and shrinkage physicochemical action of aqueous extracts of Euphorbia tirucalli on polypropylene (PP-5) subjected to temperature variations. Despite observations regarding potential practical applications, raw latexes from tested geographic regions did not chemically digest isopropylene. It is suggested that effective plastic digestion requires the presence of a specific endophytic fungus. Further tests will be conducted to investigate phytoremediation mechanisms.Item Insecticidal and juvenilizing activity tests of Euphorbia tirucalli Latex on Aedes aegypti Larvae. Micropropagation and new potential for biological activity(Instituto de Tecnologia e Educação Galileo da Amazônia, 2024) SILVA, Simone da; LEITE, Jandecy CabralEuphorbia tirucalli is a succulent species used for various applications, including vector control of mosquitoes in Africa and Asia. This study analyzed the insecticidal and juvenilizing effects of the aqueous fraction of latex obtained from explants micropropagated with 6-Benzylaminopurin (6-BA) and Norbixin, under different light fluences. Latex was extracted by ultrasonic methods and tested on Aedes aegypti larvae development. No insecticidal or juvenilizing activity was observed. New experiments will be conducted with variations in red light exposure time and higher concentrations of extracts, due to the high prevalence of dengue in Rio de Janeiro.Item Environmental impact of pollutants and the potential contribution to phytoremediation(Instituto de Tecnologia e Educação Galileo da Amazônia, 2024) SILVA, Simone da; LEITE, Jandecy CabralThis chapter revisited an experiment that evaluated elicitors for the germination of Vigna unguiculata (Cowpea Beans): the plant extract of Euphorbia tirucalli, the ultra-diluted and dynamized solution of Sulfur 5CH, and the two in combination. In 2017, significant seed engorgement and ammonia-like odor exudation suggested involvement of the sodium/potassium pump, thiol group detoxifying enzymes, and nitrogenous oxidative stress pathways. Given recent literature linking thiol groups to mercury phytoremediation, the study discusses E. tirucalli as a potential hyperaccumulator, considering mechanisms such as phytoextraction and phytovolatilization of pollutants.Item Investigation of the antifungal action of natural products on seeds of Euterpe oleraceae: Bioproduct Potential(Instituto de Tecnologia e Educação Galileo da Amazônia, 2024) SILVA, Simone da; LEITE, Jandecy CabralAçaí seeds (Euterpe oleraceae) are used in handicrafts by urban indigenous Sateré-Mawé in Rio de Janeiro, Brazil. However, fungal contamination compromises their conservation, leading to losses of approximately 47% of the purchased seeds. This study tested the antifungal activity of aqueous extracts from Bixa orellana (Annatto), Punica granatum (Pomegranate), Tagetes erecta (Marigold), and Euphorbia tirucalli (Firestick) on açaí seeds. Only E. tirucalli showed significant antifungal action (21.75%) at the tested concentration, indicating potential for seed preservation. Based on these findings, further trials will be conducted within the One Health perspective.