Factorial design applied to concentrate bioactive component of Cymbopogon citratus essential oil using short path distillation. - Tovar, Laura Plazas; Maciel, Maria Regina Wolf; Pinto, Gláucia Maria Ferreira; Filho, Rubens Maciel; Gonies, Darkion Ramalho (Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2010)