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Rheological characterization of exopolysaccharides produced by two strains of Streptococcus thermophilu
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Two strains of Streptococcus thermophilus producing capsular and capsular-ropy exopolysaccharides
(EPS) were cultivated in M17 medium supplemented with lactose at 37°C for 24 hours. At the end of fermentation, EPS were extracted and their flow behavior was assessed as a function of concentration, pH and temperature. Apparent viscosity of capsular EPS dispersions was higher than that of the capsular-ropy EPS, while activation energy was lower. A pH increase amplified activation energy in both types of EPS. Flow behavior of both EPS dispersions was fitted well by the Cross model, with capsular-ropy EPS showing greater zero shear rate viscosity, relaxation time and limiting slope. These parameters were greatly affected by the strain type, pH and temperature.
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Indexation |
Indexed by |
MyJurnal (2018) |
H-Index
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8 |
Immediacy Index
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0.000 |
Rank |
28/30,Q4(Sciences ) 28/30,Q4(Sciences ) 14/17,Q4(Medical & Health Sciences )
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Indexed by |
Scopus (SCImago Journal Rankings 2016) |
Impact Factor
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- |
Rank |
Q3 (Food Science) |
Additional Information |
0.335 (SJR) |
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