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Rio de Janeiro, Brazil

Xavier V.B.,Laboratorio Of Operacoes Unitarias | Vargas R.M.F.,Laboratorio Of Operacoes Unitarias | Cassel E.,Laboratorio Of Operacoes Unitarias | Lucas A.M.,Laboratorio Of Operacoes Unitarias
Industrial Crops and Products

Baccharis (Compositae-Asteraceae) is a large genus of plants distributed from the USA to Argentina, of which 90% are located in South America. In recent decades, species of the genus have been studied, due to their importance as sources of novel active components with possible applications in the pharmaceutical and chemical industries. This work studied three species of Baccharis: Baccharis uncinella DC, Baccharis anomala DC and Baccharis dentata (Vell) G.M. Barroso collected in São Francisco de Paula in southern Brazil. The aim of this work is the evaluation of the aromatic potential of the essential oil obtained by steam distillation method and the simulation of the extraction data by means of a mathematical model. A mathematical model based on mass transfer fundamentals is developed and applied to correlate the experimental data. This model is based on the existence of the broken and intact cells, in which the oil located in the broken cells is rapidly extracted and the oil from intact cells diffuses slowly to the surface of the vegetal material. The analysis of the essential oil was carried through by GC-MS and the major compounds identified to both processes were α-pinene, β-pinene, and spathulenol (B. uncinella), spathulenol, β-caryophyllene, and β-selinene (B. anomala), and germacrene-D, caryophyllene oxide, and spathulenol (B. dentata). © 2010 Elsevier B.V. Source

Vargas R.M.F.,Laboratorio Of Operacoes Unitarias | Lucas A.M.,Laboratorio Of Operacoes Unitarias | Barroso M.S.T.,Laboratorio Of Operacoes Unitarias | Dutra D.V.,Laboratorio Of Operacoes Unitarias | And 3 more authors.
Journal of Essential Oil-Bearing Plants

In this study, a desorption model to predict the essential oil extraction curves and global yield versus time was performed for extraction by steam distillation of three native plants of southern Brazil (Schinus molle L., Drimys angustifolia Miers., and Calyptranthes grandifolia O. Berg). The model assumed that the extractable materials were initially available uniformly in the vegetal matrix and adsorbed on the internal microstructures. The volatile extracts were obtained by steam distillation and the chemical composition was determined. The essential oil yields (w/w) were 0.4%, 0.3%, and 0.2%, respectively, for S. molle, D. angustifolia, and C. grandifolia, and the major compounds identified by CG-MS were α-pinene, sabinene, bicyclogermacrene and spathulenol for all the plants here investigated. The desorption model fitted very well the overall extraction curves. © 2012, Har Krishan Bhalla & Sons. Source

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