期刊
LWT-FOOD SCIENCE AND TECHNOLOGY
卷 105, 期 -, 页码 135-141出版社
ELSEVIER
DOI: 10.1016/j.lwt.2019.02.005
关键词
Bacillus tequilensis-GM; Exopolysaccharide; Thermostability; Emulsifying properties; Metal adsorption
资金
- Tunisian Ministry of Higher Education and Scientific Research
In the present work, an exopolysaccharide (EPS) was produced by a newly isolated Bacillus tequilensis-GM ropy strain. Results showed that EPS-GM was produced simultaneously with the growth phase and reached its maximum (2.9 g/L) when sucrose was used as carbon source. According to GC-MS and HPLC-SEC results, the recovered EPS-GM was composed by fructose, glucose, mannose, galactose, galactosamine and N-acetyl-glucosamine, with high molecular weight ranging between 1.8 and 2.5 x 10(6) Da. Different properties of EPS-GM were tested. Results showed that crude EPS-GM has several potential features, including high thermostability evaluated by DSC (with a melting point of 222 degrees C), good emulsifying properties and stability at both neutral and acidic pH, and high capacities to adsorb heavy metal ions (94.96% of Fe2+, 97.66% of Zn2+ and 98.24% of Cu2+) making it promising to be used in different industrial fields.
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