3 documents found, page 1 of 1
Bioactivity of essential oils from Artemisia against Diaphania hyalinata and it...
Seixas,Paula Tatiana Lopes; Demuner,Antonio Jacinto; Alvarenga,Elson Santiago; Barbosa,Luiz Claudio Almeida; Marques,Ana; Farias,Elizeu de SáABSTRACT: The demand for effective insecticides in pest control with low toxicity to the non-target organisms, such as natural enemies and pollinators, is increasing steadily. A good alternative for synthetic insecticides is natural compounds, including essential oils (EO). This work assessed toxicity of essential oils extracted from Artemisia annua, A. absinthium, A. camphorata, A. dracunculus and A. vulgaris ...
Isolamento e avaliação da atividade nematicida de constituintes químicos de Muc...
Demuner,Antonio Jacinto; Barbosa,Luiz Cláudio de Almeida; Nascimento,Jeferson Chagas do; Vieira,Jessy James; Santos,Maria Amelia dosPhytochemical investigation of the aerial parts and roots of Mucuna cinerea led to the isolation of a mixture of fatty acids, triacylglicerols, beta-sitosterol, stigmasterol, stigmasterol glucoside, daucosterol, asperglaucide (4) and the isoflavonoids prunetin (1), genistein (2), medicarpin (3), daidzein (5), 7-O-alpha-glycopiranosyl daidzein (6). An in vitro bioassay was carried out with compounds 1-4, at the ...
Preparation and phytotoxicity of sorgoleone analogues
Barbosa,Luiz Cláudio de Almeida; Ferreira,Maria Lúcia; Demuner,Antonio Jacinto; Silva,Antonio Alberto da; Pereira,Rita de Cássia3,5-Dimethoxybenzylic alcohol was converted into the 2-acetoxy-5-methoxy-3-(pent-1-yl)-1,4-benzoquinone (12), in seven steps, with an overall yield of 14.6%. The natural quinone sorgoleone (1) was isolated from Sorghum bicolor and converted into the corresponding quinone (13) having a saturated side chain. The selective effects of these compounds (1, 12 and 13), at the dose of 5.6 mug of a.i./ g of substrate, o...