6 documents found, page 1 of 1
Evidências de validade da Escala de Orientação para a Comparação Social (INCOM)...
Lins,Samuel Lincoln Bezerra; Campos,Miguel; Leite,Ana C.; Carvalho,Catarina L.; Cardoso,Sónia; Natividade,Jean CarlosNeste estudo procuramos validar a escala Iowa-Netherlands Comparison Orientation Scale numa amostra de adolescentes portugueses. Esta escala mede níveis de orientação da comparação social. Participaram no estudo 238 estudantes portugueses, com idades entre os 13 e os 18 anos (M = 15.43, DP = 1.76). Verificou-se que a estrutura da escala estava de acordo com a versão original do instrumento, dividindo-se em duas...
Trypanocidal activity of flavonoids and limonoids isolated from Myrsinaceae and...
Leite,Ana C.; Placeres Neto,Artur; Ambrozin,Alessandra R. P.; Fernandes,João B.; Vieira,Paulo C.; Silva,Maria F. das G. F. da; de Albuquerque,SérgioThe activity of crude extracts of three Rapanea species (Myrsinaceae) and Cipadessa fruticosa (Meliaceae) was evaluated in vitro against the trypomastigote forms of Trypanosoma cruzi. Thirty-three extracts from different organs of these species were assayed and eleven of them showed significant activity (lysis % >50). The fractionation of an active extract from branches of R. lancifolia (99.5%) led to the isola...
Screening of Trypanosoma cruzi glycosomal glyceraldehyde-3-phosphate dehydrogen...
Leite,Ana C.; Ambrozin,Alessandra R. P.; Castilho,Marcelo S.; Vieira,Paulo C.; Fernandes,João B.; Oliva,Glaucius; Silva,Maria Fátima das G. F. daThe inhibitory activity of crude extracts of Meliaceae and Rutaceae plants on glycosomal glyceraldehyde-3-phosphate dehydrogenase (gGAPDH) enzyme from Trypanosoma cruzi was evaluated at 100 μg/mL. Forty-six extracts were tested and fifteen of them showed significant inhibitory activity (IA % > 50). The majority of the assayed extracts of Meliaceae plants (Cedrela fissilis, Cipadessa fruticosa and Trichilia rama...
Biosynthetic origin of the isoprene units in chromenes of Piper aduncum (Pipera...
Leite,Ana C.; Lopes,Adriana A.; Kato,Massuo J.; Bolzani,Vanderlan da S.; Furlan,MaysaMetabolic studies involving the incorporation of [1-13C]-D-glucose into intact leaves of Piper aduncum (Piperaceae) have indicated that both the mevalonate (MVA) and the pyruvate-triose (MEP) non-mevalonate pathways are implicated in the biosynthesis of isoprene moieties present in methyl 2,2-dimethyl-2H-1-chromene-6-carboxylate (1) and methyl 2,2-dimethyl-8-(3'-methyl-2'-butenyl)-2H-1-chromene-6-carboxylate (2...
Limonoids from andiroba oil and Cedrela fissilis and their insecticidal activity
Ambrozin,Alessandra R. P.; Leite,Ana C.; Bueno,Fabiana C.; Vieira,Paulo C.; Fernandes,João B.; Bueno,Odair C.; Silva,M. Fátima das G. Fernandes daNine limonoids were isolated from Carapa guianensis and Cedrela fissilis. Among them, 1,2-dihydro-3beta-hydroxy-7-deacetoxy-7-oxogedunin is a new compound. Moreover, the assignments of some chemical shifts of xyloccensin k have been corrected and ¹H NMR data of 7-deacetylgedunin have been assigned for the first time. These isolated limonoids were assayed on Atta sexdens rubropilosa workers showing moderate inse...
Limonoids from Cipadessa fruticosa and Cedrela fissilis and their insecticidal ...
Leite,Ana C.; Bueno,Fabiana C.; Oliveira,Cintia G.; Fernandes,João B.; Vieira,Paulo C.; Silva,M. Fátima das G. Fernandes da; Bueno,Odair C.The chemical investigation of the fruits of Cipadessa fruticosa (Meliaceae) afforded the new limonoid cipadesin B and the known swietemahonolide. From the roots of Cedrela fissilis (Meliaceae) were isolated the limonoid 3beta-acetoxycarapin, new as natural product, along with the triterpenes oleanolic and oleanonic acid. These compounds and other six mexicanolide limonoids previously isolated from C. fruticosa ...