A comparison study on microwave-assisted extraction of Artemisia sphaerocephala polysaccharides with conventional method: Molecule structure and antioxidant activities evaluation

作者：Wang Junlong; Zhang Ji^*; Wang Xiaofang; Zhao Baotang; Wu Yiqian; Yao Jian

来源：International Journal of Biological Macromolecules, 2009, 45(5): 483-492.

DOI：10.1016/j.ijbiomac.2009.09.004

• Artemisia sphaerocephala polysaccharides
• Microwave-assisted extraction
• Box-Behnken design
• Chain conformation
• Antioxidant

The conventional extraction methods for polysaccharides were time-consuming, laborious and energy-consuming. Microwave-assisted extraction (MAE) technique was employed for the extraction of Artemisia sphaerocephala polysaccharides (ASP),which is a traditional Chinese food. The extracting parameters were optimized by Box-Behnken design. In microwave heating process, a decrease in molecular weight (M(w)) was detected in SEC-LLS measurement. A d(f) value of 2.85 indicated ASP using MAE exhibited as a sphere conformation of branched clusters in aqueous solution. Furthermore, it showed stronger antioxidant activities compared with hot water extraction. The data obtained showed that the molecular weights played a more important role in antioxidant activities.

• 出版日期2009-12-1
• 单位西北师范大学