Table 2. α-Glucosidase inhibitory activities of viable P. pentosaceus QU 19 cells.
| Strain | Reaction time (min) |
Glucose (mg/mL) |
Maltose (mg/mL) |
Maltose hydrolysis (%) |
pH after reaction |
|---|---|---|---|---|---|
| QU 19 | 0 | 0.007 | 0.751 | ND | 6.86 |
| QU 19 | 60 | 0.000 | 0.496 | 34.0 | 4.75 |
| − | 0 | 0.006 | 0.746 | ND | 6.96 |
| − | 60 | 0.248 | 0.480 | 35.6 | 6.95 |
The inhibitory effect of viable P. pentosaceus QU 19 cells (2 mg/mL) on maltose hydrolysis was determined with or without strain QU 19 added to the corresponding enzyme reaction mixture. Maltose and glucose concentrations were measured by HPLC. The hydrolysis rate of maltose was calculated by the decrease in maltose concentration. ND: not detected.