title: Evaluation of antioxidant activity of some natural polyphenolic compounds using the Briggs-Rauscher reaction method.
abstract: A new method based on the inhibitory effects of antioxidants on the oscillations of the hydrogen peroxide, acidic iodate, malonic acid, and Mn(II)-catalyzed system (known as the Briggs-Rauscher reaction), was used for the evaluation of antioxidative capacity. With this method, which works near the pH of the fluids in the stomach (pH approximately 2), a group of natural compounds present in fruits and vegetables or in medicinal plants assumed to have antioxidant capacity, was tested successfully. The aim of the present study is to evaluate the antioxidative properties of some active principles contained in vegetables and aromatic plants, namely, cynarin (from Cynara scolymus), rosmarinic acid (from Rosmarinus officinalis), echinacoside (from Echinacea species), puerarin (from Pueraria lobata), and oleuropein (from Olea europea). Also studied with the Briggs-Rauscher reaction method was the antioxidant activity of cyanidin 3-O-beta-glucopyranoside (from Citrus aurantium) in order to compare the results with those obtained by other methods. The conclusions on the dependency of the antioxidative activity on the pH of the testing system are given.
authors.affiliation: Dipartimento di Chimica G Ciamician, Università di Bologna, Via Selmi 2, I-40126 Bologna, Italy. rcerv@ciam.unibo.it
authors.forename: Rinaldo
authors.initials: R
authors.lastname: Cervellati
authors.forename: Cecilia
authors.initials: C
authors.lastname: Renzulli
authors.forename: Maria Clelia
authors.initials: MC
authors.lastname: Guerra
authors.forename: Ester
authors.initials: E
authors.lastname: Speroni
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D002934:Cinnamates / Q000494:pharmacology; D031942:Cynara / Q000737:chemistry; D053630:Depsides; D020900:Echinacea / Q000737:chemistry; D005419:Flavonoids; D005638:Fruit / Q000737:chemistry*; D006027:Glycosides / Q000494:pharmacology; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007452:Iodates / Q000737:chemistry; D057888:Iridoid Glucosides; D039823:Iridoids; D007529:Isoflavones / Q000494:pharmacology; D008314:Malonates / Q000737:chemistry; D008345:Manganese / Q000737:chemistry; D031658:Olea / Q000737:chemistry; D010636:Phenols / Q000494:pharmacology*; D010946:Plants, Medicinal / Q000737:chemistry*; D011108:Polymers / Q000494:pharmacology*; D029908:Pueraria / Q000737:chemistry; D011714:Pyrans / Q000494:pharmacology; D027542:Rosmarinus / Q000737:chemistry; D014675:Vegetables / Q000737:chemistry*; D000097123:Rosmarinic Acid
chemical_list: D000975:Antioxidants; D002934:Cinnamates; D053630:Depsides; D005419:Flavonoids; D006027:Glycosides; D006861:Hydrogen Peroxide; D007452:Iodates; D057888:Iridoid Glucosides; D039823:Iridoids; D007529:Isoflavones; D008314:Malonates; D008345:Manganese; D010636:Phenols; D011108:Polymers; D011714:Pyrans; D000097123:Rosmarinic Acid; C002769:oleuropein; C100257:cynarine; C030290:malonic acid; C060297:echinacoside; C033607:puerarin