期刊
FOOD CHEMISTRY
卷 169, 期 -, 页码 430-438出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.08.016
关键词
Lilium lancifolium Thunb.; Polysaccharide; Structure; Physicochemical property; Antioxidant activity
资金
- Key Program of National Natural Science Foundation of China [31230057]
- National Key Technology Research and Development Program of China [2012BAD37B02, 2012BAD37B01]
- Fundamental Research Funds for the Central Universities of China [2014HGCH0011]
A novel polysaccharide fraction (LP2-1) was isolated and purified from the edible bulbs of Lilium lancifolium Thunb. by DEAE cellulose chromatography and Sephacryl S-400 size-exclusion chromatography. The structural characterisation, physicochemical properties and antioxidant activity of LP2-1 were investigated. The results showed that LP2-1 had an average molecular weight of approximately 8.52 x 10(3) kDa and was mainly composed of L-rhamnopyranose, D-arabinofuranose, D-glucopyranose and D-galactopyranose in the molar ratio of 1.88:2.13:1.00:2.50, and major functional groups of LP2-1 were -COO-and -OH. The viscoelastic properties of LP2-1 systems exhibited a gel-like behaviour, with storage modulus higher than loss modulus, and both moduli increased with increasing Ca2+. concentration. In addition, LP2-1 had DPPH and hydroxyl radicals scavenging activities, and also had the strong reducing power and chelating activity on ferrous ion. These results suggest that LP2-1 has good antioxidant activity and can be used in food industry. (C) 2014 Elsevier Ltd. All rights reserved.
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