Dipteryx 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...
Este trabalho teve por objetivos avaliar o efeito de quatro doses de adubo mineral na produção de biomassa, no teor e na composição do óleo essencial do capim-citronela (Cymbopogon nardus) em cinco épocas de colheita. Na avaliação da produção de biomassa do capim-citronela foi adotado o delineamento experimental em blocos casualizados, em esquema de parcela subdividida, com cinco repetições. As parcelas foram c...
For six genotypes of sorghum (BR 007B, BR 700, CMSXS 210B, CMSXS 211B, CMSXS 225 R, CMSXS 376) the production of root exudate and the amount of sorgoleone in these exudates were evaluated. The analysis of sorgoleone in the exudates was carried out by high performance liquid chromatography (HPLC), using as standard a sample of sorgoleone, previously purified by silica gel column chromatography, and characterized...