کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5512194 | 1540222 | 2017 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Characterization of new exopolysaccharide production by Rhizobium tropici during growth on hydrocarbon substrate Characterization of new exopolysaccharide production by Rhizobium tropici during growth on hydrocarbon substrate](/preview/png/5512194.png)
- New exopolysaccharide from Rhizobium tropici.
- All aqueous solutions of rhizobial EPS showed high viscosity values.
- R. tropici mutants produced high levels of exopolysaccharides.
Exopolysaccharide (EPS) are produced by a diverse of rhizobia species and has been demonstrated to be a bioemulsifier with potential applications in the degradation of hydrocarbons. In the present study, attempts were made to obtain the new exopolysaccharide production by Rhizobium tropici (SEMIA 4080 and MUTZC3) strains during growth on hydrocarbon substrate. Under the different cultivation conditions, the high molecular weight exopolysaccharides from Rhizobium tropici strains cultivated for 96Â h mainly consisted of carbohydrates (79-85%) and a low percentage of protein. The EPSC3-D differed from the others, with only 60% of carbohydrate. However, all strains produced polymers with distinct rheology properties, such as viscosity of each EPS sample, suitable for different applications. In addition, RP-HPLC, FTIR and NMR studies revealed EPS produced by rhizobia strains were similar indicating minimal difference between EPS compositions.
Journal: International Journal of Biological Macromolecules - Volume 96, March 2017, Pages 361-369