title: Effect of heating, UV irradiation and pH on stability of the anthocyanin copigment complex.
abstract: The influences of temperature, UV irradiation, pH and copigment concentration on the stability of a copigmentation complex were investigated. The copigments selected for the study included: Catechin, Chlorogenic acid and Gallic acid. Five levels of copigment concentration as: 0, 120, 240, 480, 960 mg L(-1) were examined. The copigmentation effect increased with copigment contain. UV irradiation had a stronger degradation effect on the copigmentation complex than heating at 80 degrees C. The suitable pH for copigmentation complex was in pH 3.5. In this study, catechin predominate among copigments.
authors.affiliation: Department of Biology, Faculty of Science, Urmia University, Iran.
authors.forename: Setareh
authors.initials: S
authors.lastname: Parisa
authors.forename: Heidari
authors.initials: H
authors.lastname: Reza
authors.forename: Ghasemifar
authors.initials: G
authors.lastname: Elham
authors.forename: Jamei
authors.initials: J
authors.lastname: Rashid
mesh_terms: D000872:Anthocyanins / Q000032:analysis*; D001709:Biotechnology / Q000379:methods; D001937:Brassica / Q000737:chemistry*; D002392:Catechin / Q000737:chemistry; D002726:Chlorogenic Acid / Q000737:chemistry; D005707:Gallic Acid / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007492:Iran; D010860:Pigments, Biological / Q000737:chemistry* / Q000528:radiation effects; D013696:Temperature; D014466:Ultraviolet Rays
chemical_list: D000872:Anthocyanins; D010860:Pigments, Biological; D002726:Chlorogenic Acid; D005707:Gallic Acid; D002392:Catechin