| Literature DB >> 27418291 |
Yi Zhang1, Hongxin Wang2, Peng Wang1, ChaoYang Ma1, GuoHua He3, Md Ramim Tanver Rahman1.
Abstract
Polyethylene glycol (PEG) as a green solvent was employed to extract polysaccharide. The optimal conditions for PEG-based ultrasonic extraction of Dendrobium nobile Lindl. polysaccharide (JCP) were determined by response surface methodology. Under the optimal conditions: extraction temperature of 58.5°C; ultrasound power of 193W, and the concentration of polyethylene glycol-200 (PEG-200) solution of 45%, the highest JCP yield was obtained as 15.23±0.57%, which was close to the predicted yield, 15.57%. UV and FT-IR analysis revealed the general characteristic absorption peaks of both JCP with water extraction (JCPw) and PEG-200 solvent extraction (JCPp). Thermal analysis of both JCPs was performed with Thermal Gravimetric Analyzer (TGA) and Differential Scanning Calorimeter (DSC). Antioxidant activities of two polysaccharides were also compared and no significant difference in vitro was obtained.Entities:
Keywords: Antioxidant activity; Dendrobium nobile; Optimization; PEG; Polysaccharide; Response surface methodology
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Year: 2016 PMID： 27418291 DOI： 10.1016/j.ijbiomac.2016.07.034
Source DB: PubMed Journal: Int J Biol Macromol ISSN： 0141-8130 Impact factor: 6.953