title: Interaction between κ- and ι-carrageenan and anthocyanins from Vaccinium myrtillus.
abstract: Anthocyanins (ATCs) from the Vaccinium myrtillus water extract have been incorporated into the κ-carrageenan (κ-CARG) or ι-carrageenan (ι-CARG) during complexation in dilute solutions or adsorption onto the microgranules of κ-CARG or ι-CARG cross-linked with epichlorohydrin. At the optimal weight ratio of CARG to ATC at 0.4:1 and the total ATCs and CARG concentration≤0.07g/L, stable dispersions of the κ-CARG/ATCs or ι-CARG/ATCs complex nanosize particles were obtained. The Langmuir, Freundlich and Dubinin-Radushkevich adsorption models have been used to describe the equilibrium adsorption of ATCs on cross-linked CARG. The introduction of ATCs into CARG and cross-linked CARG was confirmed by FT-IR spectroscopy. The data of the HPLC analysis showed that during adsorption on cross-linked ι-CARG microgranules ATCs are isolated from the crude water extract of wild bilberries, whereas other phenolics remain in the adsorption solution. After desorption from cross-linked CARG/ATC into different media the sufficiently pure and stable solutions of ATCs were obtained.
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 Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu pl. 19, LT-50254 Kaunas, Lithuania.
authors.forename: Deimante
authors.initials: D
authors.lastname: Simanaviciute
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 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: D000327:Adsorption; D000872:Anthocyanins / Q000302:isolation & purification / Q000378:metabolism*; D002351:Carrageenan / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared; D029800:Vaccinium myrtillus / Q000737:chemistry / Q000378:metabolism*; D014867:Water / Q000737:chemistry
chemical_list: D000872:Anthocyanins; D014867:Water; D002351:Carrageenan
keywords: Adsorption; Anthocyanin; Carrageenan; Nanocomplex; Purification