title: Physicochemical and antioxidant characterization of Justicia spicigera.
abstract: Extracts with water:ethanol (100:0, 70:30, 50:50, 30:70, 0:100) solutions from fresh (F), just dried (JD), dried and stored for one year (DS) Justicia spicigera leaves were obtained using the stirring and ultrasound techniques. Extracts were analyzed in physicochemical and antioxidant characteristics. Identification of chemical compounds by gas chromatography-mass spectroscopy (GC-MS) was also performed. 2.14±0.91, 5.67±1.70, and 8.52±4.97g Gallic acid equivalents/100g dry weight (d.w.) of phenolic compounds were found, in average, for F, JD, and DS J. spicigera, respectively. 2.22±1.31, 2.58±2.11, and 8.48±3.78g Trolox equivalents/100g d.w. were detected with the ABTS method and 0.49±0.33, 1.23±0.87, and 0.88±0.94g with the DPPH method for F, JD and DS J. spicigera, respectively. Eucalyptol, phytol, and azulene were identified as the main compounds. J. spicigera showed colors (green-iridescent, green-yellow, or pink of different intensities) and antioxidant characteristics depending on the solvent concentration. Extracts could be used in the food and pharmaceutical industries.
authors.affiliation: Departamento de Ingeniería Química, Alimentos y Ambiental, Universidad de las Américas Puebla, Cholula, Puebla 72810, Mexico.
authors.forename: Itzamná
authors.initials: I
authors.lastname: Baqueiro-Peña
authors.affiliation: Departamento de Ingeniería Química, Alimentos y Ambiental, Universidad de las Américas Puebla, Cholula, Puebla 72810, Mexico. Electronic address: angel.guerrero@udlap.mx.
authors.forename: José Á
authors.initials: JÁ
authors.lastname: Guerrero-Beltrán
mesh_terms: D000975:Antioxidants / Q000032:analysis*; D052176:Azulenes / Q000032:analysis; D055598:Chemical Phenomena; D002839:Chromans / Q000032:analysis; D003116:Color; D003511:Cyclohexanols / Q000032:analysis; D000077591:Eucalyptol; D005707:Gallic Acid / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry; D027902:Justicia / Q000737:chemistry*; D039821:Monoterpenes / Q000032:analysis; D010636:Phenols / Q000032:analysis; D010836:Phytol / Q000032:analysis; D010936:Plant Extracts / Q000032:analysis / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry
chemical_list: D000975:Antioxidants; D052176:Azulenes; D002839:Chromans; D003511:Cyclohexanols; D039821:Monoterpenes; D010636:Phenols; D010936:Plant Extracts; D010836:Phytol; D005707:Gallic Acid; C005525:azulene; D000077591:Eucalyptol; C010643:6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid
keywords: Antioxidant activity; Gas chromatography; Justicia spicigera; Mass spectroscopy; Pigments