| Literature DB >> 25172745 |
Yi Dong1, Mouming Zhao2, Dongxiao Sun-Waterhouse1, Mingzhu Zhuang1, Huiping Chen1, Mengying Feng1, Lianzhu Lin3.
Abstract
The kinetics of adsorption and desorption behaviours of five macroporous resins for enriching flavonoids from Glycyrrhizaglabra L. leaf were investigated. All five resins showed similar and effective adsorption and desorption properties. A pseudo-second-order kinetics model was suitable for evaluating the whole adsorption process. Additionally, two representative resins (XAD-16 and SP825) were chosen for adsorption thermodynamics study. The adsorption of the representative resins was an exothermic and physical adsorption process. Further column chromatography of XAD-16 and SP825 showed that the total flavonoids (from 16.8% to 55.6% by XAD-16 and to 53.9% by SP825) and pinocembrin (from 5.49% to 15.2% by XAD-16 and to 19.8% by SP825) were enriched in 90% ethanol fractions. Meanwhile, the antioxidant capacities and nitrite-scavenging capacities were 2-3times higher than those of the crude extract. The fractions with high flavonoid and pinocembrin contents could be used as biologically active ingredients in functional food.Entities:
Keywords: Adsorption behaviours; Flavonoids; Macroporous adsorption resins; Pinocembrin
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Year: 2014 PMID： 25172745 DOI： 10.1016/j.foodchem.2014.07.109
Source DB: PubMed Journal: Food Chem ISSN： 0308-8146 Impact factor: 7.514