4 documents found, page 1 of 1
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 mg of a.i./ g of substrate, on...
A Musicalidade Em Contexto de Ensino de Português, LM, E De Francês, LE
Ferreira, Maria LúciaRelatório de Estágio apresentado à Faculdade de Letras da Universidade de Coimbra; O presente relatório incide sobre a minha Prática de Ensino Supervisionada, (P.E.S), realizada na Escola Profissional de Vouzela, ao longo do ano letivo de 2014/2015. O relato e respetiva reflexão crítica centram-se na prática letiva referente ao nível de ensino que acompanhei, o 12ºAno, nas disciplinas de Português e de Francês....
Evaluation of quinone herbicide activity
Ferreira, Maria Lúcia; Barbosa, Luiz Cláudio de Almeida; Demuner, Antônio Jacinto; Silva, Antônio Alberto da; Pereira, Rita de CássiaSix commercial quinones (2,5 - dihydroxy-1,4-benzoquinone [1], camphorquinone [2], phenantrequinone [3], anthrarufin [4], sodium sulfonate anthraquinone [5] and lapachol [6]) were tested as for their phytotoxic potential. The compounds were tested on Sorghum bicolor, Cucumis sativus, and Desmodium tortuosum cultivated in washed sand in Petri dishes and on Lactuca sativa, Cucumis sativus, Desmodium tortuosum, Hy...
Analysis and quantification of sorgoleone from different cultivars of sorghum (...
Ferreira, Maria Lúcia; Barbosa, Luiz Claudio de Almeida; Demuner, Antônio Jacinto; Silva, Antônio Alberto da; Wakil, JoséFor 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...