Caracterização química e avaliação da atividade antimicrobiana de óleos essenciais de Lavandula dentata L
The chemical composition of the essential oils of the different parts of Lavandula dentata L., namely (inflorescences and aerial part without inflorescences) was determined. The essential oils were extracted by steam removal and their chemical constitutions were determined by gas chromatography coup...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | Brasil |
| Institución: | Universidade Federal do Triangulo Mineiro (UFTM) |
| Repositorio: | Biblioteca Digital de Teses e Dissertações da UFTM |
| Idioma: | portugués |
| OAI Identifier: | oai:bdtd.uftm.edu.br:tede/569 |
| Acceso en línea: | http://bdtd.uftm.edu.br/handle/tede/569 |
| Access Level: | acceso abierto |
| Palabra clave: | Lavandula dentata. CIM. CBM. Fenchona. Eucaliptol. MIC. MBC. Fenchone. Eucalyptol Bioquímica Química de Macromoléculas |
| Sumario: | The chemical composition of the essential oils of the different parts of Lavandula dentata L., namely (inflorescences and aerial part without inflorescences) was determined. The essential oils were extracted by steam removal and their chemical constitutions were determined by gas chromatography coupled to mass spectrometry. The antimicrobial activity of these extracted oils and commercial essential oils of Lavandula hybrida and Lavandula officinalis was evaluated by determining the Minimum Inhibitory Concentration (MIC) and the Minimum Bactericidal Concentration (MBC). It was observed that the essential oils of the species L. dentata L., collected in Uberaba - MG have varied chemical composition and are composed mainly of monoterpenes. No significant differences were observed in the chemical composition of the essential oils of the different parts of L. dentata L. It was not possible to observe a pattern referring to the relative concentrations of the main constituents among the species studied. The plants of L. hybrida and L. officinalis showed a higher concentration of Linalool and linaline acetate, while L. dentata L. plants presented higher concentration of Fenchone, Eucalyptol (1,8-cineol) and Camphor. In the extractions of the essential oils, the highest yields were observed during the cold period and with less precipitation of rain. Oils extracted from L. dentata L. showed higher activity against clinical isolates of HC-UFTM, whereas L. hybrida and L. officinalis oils were more effective against the tested ATCC microorganisms. None of the tested oils showed activity against Pseudomonas aeruginosa. To choose O.E for a given application, it is important to take into account the microorganism of interest, since the inhibitory activity was different among the species of the same group. The results indicate that L. dentata L. O.Es grown in Uberaba have chemical and microbiological characteristics similar to those produced in Curitiba - PR, giving us a promising perspective for the cultivation and extraction of O.Es of this species in Minas Gerais. |
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