Dichlorometane
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Avaliação alelopática e caracterização fitoquímica do extrato em diclorometano de folhas de Curatella americana L. (Lixeira)
Os métodos atuais de controle das plantas daninhas têm provocado uma insatisfação de ordem social, por colocarem em risco a qualidade dos alimentos de uso humano e animal. Diante de tal problema, associado ao aparecimento de espécies mais resistentes aos atuais herbicidas, se faz necessário, a busca de novas alternativas de controle. O presente trabalh
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/08/2011
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2. Morphology, anatomy, chemical composition of essential oil and antimicrobial activity of the leaves and stem bark of Myrcia tomentosa (Aubl.) DC. / Morfoanatomia, composição química do óleo essencial e atividade antimicrobiana das folhas e casca do caule de Myrcia tomentosa (Aubl.) DC.
The Brazilian Savanna is recognized as the richest in the world, sheltering more than 6.500 plant species already cataloged, and medicinal uses are attributed to over 220. Species of Myrtaceae family are used in folk medicine in gastrointestinal disorders, infectious diseases and hemorrhagic states, many are known by the presence of essential oils. The objec
Publicado em: 2010
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3. SÍNTESE DE COMPOSTOS ANFIFÍLICOS DERIVADOS DE δ-D-GLICONOLACTONA, POTENCIAIS AGENTES SURFACTANTES
Surfactants are amphiphilic molecules widely used in many industries. A constant need for products obtained from natural raw materials instead of petroleum derivatives has led to a lot of studies on developing natural surfactants derivative from carbohydrates. These compounds are versatile, biodegradable and introduce a wide range of applications, awake the
Publicado em: 2006
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4. Diterpenos de Myrocarpus frondosus Allemão : isolamento, determinação estrutural e atividade biologica
The phytochemical study of hexane and dichloromethane extracts trom the roots ot Myrocarpus frondosus resulted in the isolation of seven diterpenes (18, 19, 20, 21, 22, 23 and 24) whose strutuctures were determined by the analysis of mass spectra (Iow and high resolution and EM/EM experiments), 1D-NMR (H, C, DEPT e NOESY 1 D) and 2D-NMR (gCOSY, HSQC/HETCOR e
Publicado em: 2005
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5. Estudo fitoquímico de Myrcia rotundifolia (Berg.) Legrand (Myrtaceae).
This work describes the composition of the volatile oils from leaves of Myrcia rotundifolia Berg. and the isolation, identification and structural elucidation of secondary metabolites from organic extracts of stems. M. rotundifolia is a specie found on sand dunes in Parque Metropolitano do Abaeté, Salvador, it has been studied chemically for the first time.
Publicado em: 2002
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6. Terpenos de Wunderlichia crulsiana e Mikania sp. nov. / Terpenes from Wunderlichia crulsiana and Mikania sp. nov.
This work describes the chemical study of two plants which belong to the family Asteraceae: Mikania sp. nov. and Wunderlichia crulsiana. The dichlorometane extracts from leaves and stems of Mikania sp. nov. we studied and seven diterpenic acids were isolated and identified. The volatile oil from leaves and stems of this plant were also studied and twenty sub
Publicado em: 2000
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7. Oxidação seletiva de cicloexano catalisada por zeolita Y contendo terras raras
Catalysts of the type LnY (Ln = Ce, Me, Nd, Sm and Yb) were synthesized starting from the respective rare earth chlorides and of zeolites Y (Si: AI = 2,6 , 12,5, 28, 60 and 100) by means of solid state exchange (T = 800 K, p = 13 kPa and t = 6 h). Such catalysts were characterized by X-ray difraction, infrared espectroscopy, AI and Si nuclear magnetic resona
Publicado em: 1999