Back to Search
Start Over
Extraction and biological activity of exopolysaccharide produced by Leuconostoc mesenteroides SN-8.
- Source :
-
International Journal of Biological Macromolecules . Aug2020, Vol. 157, p36-44. 9p. - Publication Year :
- 2020
-
Abstract
- An exopolysaccharide (EPS)-producing strain SN-8 isolated from Dajiang was identified as Leuconostoc mesenteroides. When sucrose was used as the carbon source for fermentation, the output of EPS was 2.42 g/L. High performance liquid chromatography analysis confirmed the presence of monomers such as glucan and mannose. The molecular weight detection value is 2.0 × 105 Da. Fourier transform infrared spectroscopy displayed the EPS had the basic skeleton and functional groups of a typical polysaccharide structure. Scanning electron microscopy showed smooth surfaces and compact structure. Thermal performance analysis showed that the highest heat resistance temperature of the EPS was 80 °C. Compared with vitamin C, its hydroxyl radical scavenging rate was as high as 32% and 1,1-diphenyl-2-picrylhydrazyl scavenging rate was as high as 40% under the same concentration. The peanut oil was the most emulsifiable at a concentration of 1.5 mg/mL, and the emulsification index was 0.55. These results might show that the EPS had high application value. Unlabelled Image • The high EPS-producing strain was newly isolated from Dajiang , a traditional fermented food in northeast China. • The produced EPS were dextrans and mannose with high molecular weight. • EPS sample were characterized by antioxidant activity in vitro and high emulsifying properties. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01418130
- Volume :
- 157
- Database :
- Academic Search Index
- Journal :
- International Journal of Biological Macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 143721716
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2020.04.150