1. Partial Purification, Characterization, and Application of Exopolysaccharides Produced by Lactobacillus plantarum NS1905E in Yogurt.
- Author
-
Lei, Wenping, Chen, Qi, Liu, Yan, Tang, Xia, Luo, Jie, Liu, Chengguo, and Zhou, Hui
- Subjects
YOGURT ,LACTOBACILLUS plantarum ,FOOD additives ,LACTIC acid bacteria ,DAIRY products ,FOURIER transform infrared spectroscopy - Abstract
Exopolysaccharides (EPS) of lactic acid bacteria (LAB) has gained special interests in the dairy industry due to their health-promoting properties and contribution to the rheology of fermentation milk products. In the present study, an EPS designated as EPS-NS1905E was partially purified and characterized secreted from L. plantarum NS1905E. The EPS-NS1905E had an average molecular weight of 2.658 × 10
5 Da and was composed of glucose, arabinose, rhamnose, mannose, and galactose in an approximate molar ratio of 58.83 : 17.4 : 6.31 : 5.86 : 2.74. The FTIR spectroscopy showed the prevalence of carboxyl and hydroxyl groups. The EPS-NS1905E had a thermal stability and exhibited higher viscosity in the NaCl solution and low acidity conditions (pH 2–4). Furthermore, the EPS-NS1905E possessed strong scavenging abilities against DPPH radicals (96%). The addition of EPS-NS1905E in skim milk significantly shortened the fermentation time of yogurt, and the water-holding capacity (WHC) and viscosity of yogurt were improved during storage. The results indicated that the EPS-NS1905E has great potential for use as a food additive in the food industry. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF