Effect of microwave extraction on rheology and biological activity of lily polysaccharide
HUANG Qunhui1,2, HUANG Zhiyun1,2, TIAN Wenjing1,2, LI Zhengdou1,2, DING Ling1,2, SHI Jinhan1,2, MA Wangjun1,2, MA Yuting1,2, ZHANG Ji1,2,3*
1(College of Life Science,Northwest Normal University,Lanzhou 730070,China) 2(Bioactive Products Engineering and Distinctive Plants Technology Research Center for Gansu,Lanzhou 730070,China) 3(Institute of New Rural Development,Northwest Normal University,Lanzhou 730070,China)
Abstract: Different power, time and temperature were optimized in microwave-assisted hot water extraction method to extract LPS. And the preliminary structural of LPS was characterized by FT-IR. To study the rheological properties of LPS, and its fluidity and thixotropy, the antioxidant activities in vitro of LPS extracted by seven different microwave-assisted methods were compared. The results showed that the LPS extracted by FT-IR under different microwave conditions had the characteristic absorption peaks of polysaccharides (at 3 382, 2 928, 1 636, 1 415 and 802 cm-1), which indicating that the LPS were an acidic polysaccharide. The results of rheological properties showed that the LPS extracted with different microwave conditions had different degrees of fluidity and thixotropy. And antioxidant in vitro experiments showed that the LPS extracted with different microwave-assisted had antioxidant activities, it has important application value in medical research and production.
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