3 documents found, page 1 of 1
Chemical composition and histochemistry of Sphagneticola trilobata essential oil
Silva,Cleber José da; Barbosa,Luiz C. A.; Demuner,Antonio J.; Montanari,Ricardo M.; Francino,Dayana; Meira,Renata M. S. A.; Souza,Ana Olívia deAnatomical and histochemical investigations of Sphagneticola trilobata (L.) Pruski, Asteraceae, secretory structures in leaves and stems and the seasonal variation of essential oils were carried out. Histochemical techniques enabled the specific location of the essential oil accumulation in the internal (canals) and external structures (trichomes). Histochemical analysis showed that the secretory trichomes prod...
Síntese e avaliação da atividade antimicrobiana de furanonas halogenadas e de c...
Barbosa,Luiz C. A.; Maltha,Célia R. A.; Demuner,Antônio J.; Pinheiro,Patrícia F.; Varejão,Jodieh O. S.; Montanari,Ricardo M.; Andrade,Nélio J.Considering the broad spectrum of biological activity of gamma-butyrolactone derivatives, we presented the synthesis of 3,4-dihalo-5-arylidenefuran-2(5H)-ones (17-21) and analogues (24-28) of the natural product nostoclide (7,8). Furanones 17-21 were synthesized from the condensation of aromatic aldehydes with lactones 14 and 15, that were obtained from mucobromic and mucochloric acids. Lactone 15 was converted...
Chemical composition and antibacterial activities from the essential oils of my...
Silva,Cleber J.; Barbosa,Luiz C. A.; Demuner,Antonio J.; Montanari,Ricardo M.; Pinheiro,Antônio L.; Dias,Iara; Andrade,Nélio J.The essential oils of seven Myrtaceae species were investigated for its chemical composition and antibacterial activity. The volatile oils were characterized by a high content of monoterpenoids of which 1,8-cineole (88.0, 65.0 and 77.0% for Melaleuca hypericifolia, Callistemon viminalis and Callistemon citrinus respectively), terpinen-4-ol (47.0 and 49.8% for Melaleuca thymifolia and Callistemon polandii respec...