期刊
FOOD CHEMISTRY
卷 138, 期 2-3, 页码 1470-1475出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2012.11.039
关键词
Bulgaria inquinans (Fries); Glucogalactan; Mannan; Antioxidant activity
资金
- Chinese New Drug Creation and Manufacturing Program [2012ZX09502001-001]
- National Natural Science Foundation of China [30973857]
The non-lichenized ascomycete Bulgaria inquinans (Fries), growing in the Changbai Mountain of China, has been used as medicinal diet for many years. In a previous study, we have reported that a heteropolysaccharide BIWS-4b from the fruit bodies of B. inquinans (Fries) exhibited markedly antimalarial and immunostimulating activities. In this paper, the structural features and antioxidant activity of BIWS-4b were investigated. The results showed that BIWS-4b contains an alpha-(1 -> 2), (1 -> 6)-mannan core to which the glucogalactan chains are attached. The glucogalactan chains were composed of (1 -> 6)-, (1 -> 5)- and (1 -> 5,6)-linked beta-Galf, (1 -> 4)-linked and non-reducing terminal beta-Glcp units, and might be attached to the mannan core at the O-2 positions of alpha-Manp units. The antioxidant assays showed that BIWS-4b exhibited good activities, including free radicals scavenging effects, ferrous ion-chelating ability and reducing power. Thus, BIWS-4b could be used as a natural antioxidant agent for food and pharmaceutical industries. (c) 2012 Elsevier Ltd. All rights reserved.
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