7 documents found, page 1 of 1
Synthesis and Evaluation of Nematicidal Activity of Compounds Derived from Norb...
Gomes,Anni C. S.; Demuner,Antonio J.; Alvarenga,Elson S.; Gondim,João P. E.; Fonseca,Andressa R.; Buonicontro,Dalila S.; Pilau,Eduardo J.; Silva,EvandroNematode is a major problem in agriculture, the effective way to control this pest is through chemical control, but the efficient molecules present in the market have great toxicity to mammals and birds. Thus, there is a constant demand for the development of new nematicide molecules. This study describes the synthesis of 21 novel esters derived from norbornadiene and evaluation of their potential activity agai...
Synthesis of 1,2,3-Triazole Derivatives of Hydnocarpic Acid Isolated from Carpo...
Osorio,Liseth S.; Ionta,Marisa; Demuner,Antonio J.; Sousa,Bianca L. de; Ferraz,Guilherme O.; Varejão,Eduardo V. V.; Ferreira-Silva,Guilherme A.Carpotroche brasiliensis is a tree native to Brazil, belonging to the family Flacurtiaceae, whose seeds contain a group of cyclopentenyl fatty acids: gorlic (12%), chaulmugric (27%), and hydnocarpic (48.7%). These compounds are considered the main therapeutic agents in the treatment of leprosy. In the present study, a series of novel triazole compounds were obtained by conjugation between hydnocarpic acid and f...
Chemical characterization by GC-MS and phytotoxic potential of non-polar and po...
Oliveros-Bastidas,Alberto de J.; Demuner,Antonio J.; Barbosa,Luiz Claudio de AlmeidaDipteryx odorata (Aubl.) Willd. is a tall arboreal species native to Central and Northern South America. This paper describes the chemical characterization and phytotoxic potential of polar and non-polar extracts from D. odorata seeds. Structural determinations were accomplished by chemical derivatization and analyzed by GC/MS. The chemical composition of the non-polar fraction (hexane and dichloromethane) pres...
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...
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...
Sorção e persistência da sorgoleona em um Latossolo Vermelho-Amarelo
Demuner,Antonio J.; Barbosa,Luiz C. A.; Chinelatto Jr.,Luiz S.; Reis,César; Silva,Antonio A.The root exudates produced by sorghum contain a biologically active constituent known as sorgoleone. The behavior of sorgoleone in a Red-Yellow Latosol was studied. The sorption model of sorgoleone in soil was better adjusted to the Freundlich equation, through the coefficients Kf (capacity of sorption) and 1/n (linearity of the isotherm). The persistence of sorgoleone in soil and its possible degradation were ...
Synthesis and evaluation of the plant growth regulatory activity of 8-oxabicycl...
Barbosa,Luiz Cláudio A.; Demuner,Antonio J.; Borges,Eduardo E.L.; Mann,JohnThe synthesis of several analogues of 8-oxabicyclo[3.2.1]oct-6-en-3-one is reported. The effect of these compounds and 4-oxohexanoic acid on the germination and radicle growth of Sorghum bicolor was evaluated. At 100 ppm compounds 3-(methoxycarbonylmethyl)-8-oxabicyclo[5.3.0]dec-4-ene-2,9-dione (13) and 4-oxohexanoic acid (17) showed 33-35% stimulatory radicle growth, and at 1000 ppm a 29% (13) and 80.2% (17) i...