title: Dodonaea viscosa var. angustifolia leaf: new source of polysaccharide and its anti-oxidant activity.
abstract: Ultrasonic technology was applied for polysaccharide extraction from the leaves of Dodonaea viscosa and response surface methodology (RSM) was used to optimize the effects of processing parameters on polysaccharide extraction yield. Three independent variables were extraction time (X1), extraction temperature (X2) and ultrasonic power (X3), respectively. The statistical analysis indicated the independent variables (X1, X2, X3), the quadratic terms (X11 and X33) and the interaction terms (X1X2, X1X3, X2X3) had significant effects on the yield of polysaccharides (P<0.05). The optimal extraction conditions of D. viscosa leaf were determined as follows: extraction time 50.54 min, extraction temperature 85 °C and ultrasonic power 400 W. Under these conditions, the experimental yield of polysaccharides was 9.455±0.24%, which was agreed closely with the predicted value (9.398%). The evaluation of anti-oxidant activity suggested that the polysaccharide exhibited significant protection against DPPH and hydroxyl radicals and could be explored as a nutraceutical agent.
authors.affiliation: Department of Food Science and Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran, Iran. vsamavati@ut.ac.ir
authors.forename: Vahid
authors.initials: V
authors.lastname: Samavati
authors.forename: Amir
authors.initials: A
authors.lastname: Manoochehrizade
mesh_terms: D001713:Biphenyl Compounds / Q000737:chemistry; D016166:Free Radical Scavengers / Q000737:chemistry* / Q000302:isolation & purification*; D017665:Hydroxyl Radical / Q000737:chemistry; D007221:Industry; D008962:Models, Theoretical; D010851:Picrates / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification*; D029631:Sapindaceae / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014465:Ultrasonics
chemical_list: D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D010851:Picrates; D011134:Polysaccharides; D017665:Hydroxyl Radical; C004931:1,1-diphenyl-2-picrylhydrazyl
keywords: Dodonaea viscosa; Polysaccharide; Radical scavenging activity; Ultrasonic