RESUMOEste artigo apresenta resultados de um estudo experimental, de um incêndio em dormitório de edificações tipicamente incendiadas na cidade de Recife -Brasil. Utilizou-se um cômodo em estrutura de concreto armado e vedação de tijolos cerâmicos da oficina de treinamento do Corpo de Bombeiros, que foi reformado e adequado para o experimento. Este compartimento foi preparado com mobiliário e objetos encontrados em incêndios ocorridos na cidade no triênio 2011-2013. Realizou-se 24 aferições térmicas com termopares tipo K, buscando-se o comportamento térmico no dormitório, no mobiliário e paredes nas faces interna e externa. O experimento foi monitorado através de imagens VHS e câmara térmica mostrando um eficaz resfriamento nas paredes com uso do jato atomizado aplicado pela equipe de combate a incêndio. Palavras chaves: incêndio em dormitório; incêndio em edificações; incêndio real; segurança contra incêndio.____________________________________________________________________________________
The allelopathic potential of some plant species has been scientifically proven over the years. The use of such natural compounds with phytotoxic activity is an alternative to synthetic herbicides. Thus, this research aims to analyze the phytochemical profile and the allelopathic effect of aqueous extracts of Fimbristylis miliacea (L.) Vahl. The allelopathic potential was evaluated by germination bioassays using seeds from two receptor species (Lactuca sativa L. and Emilia fosbergii Nicolson) and seven concentrations of aqueous extracts of F. miliacea aerial and underground parts in triplicate. The variables evaluated were germination (G) andJournal of Agricultural Studies 311 germination speed index (GSI). The data obtained were submitted to F test and the averages to regression analysis. In addition, phytochemical analyses were performed to analyze possible allelochemicals present in aqueous extracts of F. miliacea through phytochemical screening and by high performance liquid chromatography (HPLC). The aqueous extracts of aerial and underground parts of F. miliacea inhibit the germination of E. fosbergii seeds at all concentrations analyzed (0.94, 1.87, 3.75, 7.5, 15 and 30%). However, the same extracts do not show any effects when evaluated in L. sativa seeds. The aqueous extract of F. miliacea shows important chemical constituents (gallic acid, chlorogenic acid, rutin, luteolin, apigenin, acacetin, and alkaloids) that can be directly related to the allelopathic effects observed in E. fosbergii seeds.
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