Ultrasound-assisted Extraction and Antibacterial Activity of Polysaccharides from Rhizoma phragmitis

doi:10.7506/spkx1002-6630-201114030

Abstract

Abstract: On the basis of single factor experiments, the ultrasound-assisted extraction of polysaccharides from Rhizoma phragmitis was optimized by response surface methodology. The optimal conditions for polysaccharide extraction were liquid/material ratio of 9.9:1 (mL/g), temperature of 60 ℃ and ultrasonic treatment time of 52 min. Under the optimal extraction conditions, the extraction rate of polysaccharides from Rhizoma phragmitis was 9.06%. The extracted polysaccharide sample was extremely sensitive to Saccharmoyces cerevisiae, highly sensitive to Staphy lococcus aureus, and moderately sensitive to Aspergillumniger and Bacillus subtilis. Therefore, polysaccharides from Rhizoma phragmitis can be developed into a novel antibacterial product.

Key words: Rhizoma phragmitis, polysaccharides, ultrasound-assisted extraction, antibacterial activity

CLC Number:

O623.54

YAO Yi-cai，GENG Zhong-hua，WANG Nai-xin，ZHENG Yi，LI Chao. Ultrasound-assisted Extraction and Antibacterial Activity of Polysaccharides from Rhizoma phragmitis[J]. FOOD SCIENCE, 2011, 32(14): 147-151.

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Ultrasound-assisted Extraction and Antibacterial Activity of Polysaccharides from Rhizoma phragmitis

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