Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5157599 | Carbohydrate Polymers | 2017 | 28 Pages |
Abstract
In recent decades, microbial synthesis of polysaccharides with special functional properties has attracted increasing attention. This work reported a novel exopolysaccharide (EPS)-producing strain, Klebsiella sp. PHRC1.001 isolated from activated sludge. Physicochemical, rheological, emulsifying and toxicological properties of the obtained EPS were characterized. The EPS was mainly composed of d-glucose and l-arabinose, and was found to exist in aqueous solution in a nano-particulated form (â¼50Â nm in diameter) with a strong tendency of aggregation. Rheological analysis showed that the EPS aqueous solution was a typical pseudoplastic fluid at higher concentration and could form weak gel upon alkaline treatment followed by neutralization. The EPS exhibited excellent emulsifying properties in stabilizing oil-in-water emulsions presumably by a Pickering mechanism owing to its nanoparticle structure. Acute toxicity test showed that 1.8Â g EPS per kg of body weight caused no toxic effect on mice. PHRC1.001 EPS has the potential to be a novel industrial polysaccharide.
Related Topics
Physical Sciences and Engineering
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Authors
Meng Zhao, Nana Cui, Fangning Qu, Xue Huang, Hao Yang, Shaoping Nie, Xueqiang Zha, Steve W. Cui, Katsuyoshi Nishinari, Glyn O. Phillips, Yapeng Fang,