Abstract：
:A high molecular weight levan was produced by a novel levansucrase and some properties of this polymer were investigated. The levan exhibited a poroid microstructure as well as series of individual ellipsoidal or spheroidal particles. The weight-average molecular weight (M¯w) of the levan was determined to be 1.41×108Da. In a 0.1% solution, the levan showed a mean diameter of 176nm, while in a 1% solution the diameter was 182nm. The decomposition temperature was determined to be 216.67°C, with an endothermic peak at 147.41°C and a melting enthalpy of 76.9J/g. The small angle X-ray diffraction pattern showed a distinctive peak pattern between 15° and 40° (2q). The levan solution showed a shear-thinning behaviour. These results suggest this levan could be a good additive in the food processing industry, as well as an important bio-based material in the medicinal or chemical industry.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Xu W,Liu Q,Bai Y,Yu S,Zhang T,Jiang B,Mu Wdoi
10.1016/j.ijbiomac.2017.11.056subject
Has Abstractpub_date
2018-04-01 00:00:00pages
810-818eissn
0141-8130issn
1879-0003pii
S0141-8130(17)34052-7journal_volume
109pub_type
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