4 documents found, page 1 of 1
Valorization of Hesperidin from Citrus Residues: Evaluation of Microwave-Assist...
Silva,Danielle F. da; Bomfim,João P. A.; Marchi,Rafael C.; Amaral,Jéssica C.; Pinto,Luciano S.; Carlos,Rose M.; Ferreira,Antonio G.; Forim,Moacir R.The aim of the current study was the valorization of hesperidin, the dominant flavonoid in citrus processing waste, by microwave-assisted synthesis of hesperidin-Mg complex, improving its antioxidant activity and insecticidal potential. Here we show, for the first time, that microwave-assisted synthesis of [Mg(hesp)2(phen)]OAc (1) (hesp: hesperidin, phen: phenanthroline) improve the reaction rate and yield. The...
Evaluation of Lignins of Trunk and Roots from Citrus sinensis L. Osbeck: A Larg...
Porto,Deyvid S.; Forim,Moacir R.; Costa,Eveline S.; Fernandes,João B.; Silva,Maria F. G. F. daCitrus biomass is a source of biobased products and presents extensive chemical diversity. Among the structural macromolecules, lignins have been used in resins, bioplastics, and nanoencapsulation. Brazil has a large source of lignins, which are orange trees removed from groves that need to be renewed. However, the knowledge about these lignins is limited and little explored. Thus, this work aimed to evaluate t...
Phragmalin Limonoids from Swietenia macrophylla and Their Antifeedant Assay aga...
Pamplona,Sônia G. S. R.; Arruda,Mara S. P.; Castro,Kelly C. F.; Silva,Consuelo Y. Y. e; Ferreira,Antonio G.; Silva,Maria F. G. F. da; Ohashi,Orlando S.The purification of the hexanic extract from the leaves of a native variety of mahogany collected in Santarém (Pará, Brazil) afforded eight new phragmalin limonoids along with eight known compounds. This variety, according to field observations, should be considered resistant against the specialist insect Hypsipyla grandella, that attacks the terminal shoots only of juvenile mahogany and not of matured ones. Af...
Atividade inseticida de óleos essenciais de Pelargonium graveolens l'Herit e Li...
Niculau,Edenilson dos S.; Alves,Péricles B.; Nogueira,Paulo Cesar de L.; Moraes,Valéria Regina de S.; Matos,Andréia P.; Bernardo,Antonio R.Insecticidal activity of essential oils of Pelargonium graveolens, Lippia alba and compounds geraniol, linalool, 1,8-cineole, limonene, carvone, citral and Azamax® were evaluated against Spodoptera frugiperda. Topical application assay showed essential oil of P. graveolens has acute toxicity against Spodoptera frugiperda larvae (third instar) with LD50 1.13 µg/mg per insect and LD90 2.56 µg/mg per insect. Three...