title: Complexes of dextran sulfate and anthocyanins from Vaccinium myrtillus: Formation and stability.
abstract: To improve the stability and antioxidant activity of anthocyanins (ATC), complexes of dextran sulfate (DESU) and ATC extracted from Vaccinium myrtillus were formed during electrostatic interaction between sulfo groups of DESU and cationic moieties of ATC. At the optimal weight ratio DESU/ATC=0.4 g/g, the amount of ATC introduced into a complex depended on the total concentration of the reagents. About 1.7 g of ATC per g of DESU could be incorporated into a complex. The formation of DESU/ATC complexes was confirmed by HPLC and FT-IR spectroscopy. According to HPLC analysis, the amount of individual ATC incorporated into a complex varied from 73.7% in the case of malvidin-3-O-glucoside to 90.8% in the case of delphinidin-3-arabinoside.
authors.affiliation: Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu pl. 19, LT-50254, Kaunas, Lithuania. Electronic address: rimakli@ktu.lt.
authors.forename: Rima
authors.initials: R
authors.lastname: Klimaviciute
authors.affiliation: Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu pl. 19, LT-50254, Kaunas, Lithuania.
authors.forename: Vesta
authors.initials: V
authors.lastname: Navikaite
authors.affiliation: Department of Pharmaceutical Chemistry and Pharmacognosy, Lithuanian University of Health Sciences, Eiveniu Str. 4, LT-50161, Kaunas, Lithuania.
authors.forename: Valdas
authors.initials: V
authors.lastname: Jakstas
authors.affiliation: Department of Analytical and Toxicological Chemistry, Lithuanian University of Health Sciences, Eiveniu Str. 4, LT-50161, Kaunas, Lithuania.
authors.forename: Liudas
authors.initials: L
authors.lastname: Ivanauskas
mesh_terms: D000872:Anthocyanins / Q000737:chemistry*; D000975:Antioxidants / Q000494:pharmacology; D002851:Chromatography, High Pressure Liquid; D016264:Dextran Sulfate / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000494:pharmacology; D007477:Ions; D008970:Molecular Weight; D010936:Plant Extracts / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D029800:Vaccinium myrtillus / Q000737:chemistry*
chemical_list: D000872:Anthocyanins; D000975:Antioxidants; D016166:Free Radical Scavengers; D007477:Ions; D010936:Plant Extracts; D016264:Dextran Sulfate
keywords: Anthocyanins; Dextran sulfate; Nanocomplexes