An?lise dos constituintes qu?micos do ?leo essencial de Eugenia speciosa Camb. (Myrtaceae)

• Ano de defesa: 1998
• Autor(a) principal: Alves, Luciana Vign?lio
• Orientador(a): Alegrio, Leila Vilela
• Banca de defesa: Alegrio, Leila Vilela, Morais, Anselmo Alpande de, Patitucci, Maria L?cia, Godoy, Ronoel Luiz de Oliveira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal Rural do Rio de Janeiro
• Programa de Pós-Graduação: Programa de P?s-Gradua??o em Qu?mica
• Departamento: Instituto de Ci?ncias Exatas
• País: Brasil
• Palavras-chave em Português: Eugenia speciosa; ?leo essencial; Myrtaceae
• Área do conhecimento CNPq: Qu?mica
• Link de acesso: https://tede.ufrrj.br/jspui/handle/jspui/3912

The specie Eugenia speciosa Camb., belongs to genus Eugenia, Myrtaceae family, is popularly known as "laranjinha do mato" or "ara?azeiro". The essential oil from its leaves, obtained by hydrodistillation, was analysed by HRGC and HRGC-MS and revealed a predominance monoterpenoid compounds in its chemical composition. Twenty eight compounds were identified (96% of our relative chemical composition) by comparison of their mass spectra with the ones in the literature and Wiley and NIST mass spectra library and by their Retention Indexes in a Iow-polarity fused silica capillary column, 5% diphenyl and 95%dimethylpolisiloxane stationary phase (SE-54). The monoterpenes limonene (33.7%), a-terpineol (18.9%), a-pinene (5.8%), terpinen-4-ol (5.0%) and terpinolene (4.5%) are the majors ones. The retention indexes calculated for any substances in polar column, 100% poliethyleneglicol stationary phase were not conclusive because there is a great difference among the values of these indexes for a same substance in the literature. This discrepancy can be explained by the use of different equations to calculate these retention indexes, by the type of stationary phase of fabricate different and by temperature programming. Mass fragmentation proposals for the principais ?ons and biosynthetic routes are suggested to the identified compounds in this work.