Journal
CARBOHYDRATE POLYMERS
Volume 89, Issue 1, Pages 177-184Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.02.068
Keywords
Ultrasonic-assisted extraction; Cyclocarya paliurus (Batal.) Iljinskaja; Polysaccharides; Response surface methodology; Antioxidant activity; Antimicrobial activity
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Funding
- National Natural Science Foundation of China [31130041]
- State Key Laboratory of Food Science and Technology, Nanchang University, China [SKLF-QN-201104, SKLF-MB-201001]
- Educational Commission of Jiangxi Province, China [GJJ10049]
- National Key Technology R & D Program of China [2012BAD33B06]
- Natural Science Foundation of Nanchang University, China [2009NDXJ30]
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Recently. renewed interest has grown in the use of ultrasonic-assisted extraction as an alternative approach to the traditional extraction methods. In this study, this novel extraction method was used to isolate polysaccharides from Cyclocarya paliurus (Batal.) Iljinskaja, and response surface methodology (RSM) was employed to optimize the extraction conditions. The optimal conditions for the extraction of polysaccharides were determined to be the ratio of liquid to solid of 8, extraction time of 59 min and extraction temperature of 58 degrees C. Under these optimal conditions, the yield of polysaccharides obtained was 4.91 +/- 0.11%, which was well matched with the value predicted by the model. In vitro antioxidant assays showed that the polysaccharides exhibited strong DPPH radicals (92.09% at 0.25 mg/ml) anti self-oxidation of 1,2,3-phentriol (37.22% at 1 mg/ml) scavenging activities, moderate hydroxyl radicals (43.18% at 1 mg/ml) scavenging activity and lipid peroxidation inhibitory effect (31.66% at 1 mg/ml). In addition, the polysaccharides showed moderate antimicrobial activity. (c) 2012 Elsevier Ltd. All rights reserved.
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