Abstract
Sweetpotato flour (SPF), prepared from 44 genotypes adapted to Philippine conditions, showed wide variation in Rapid Visco-Analyzer (RVA) pasting characteristics due to its variation in composition and endogenous amylase activity. The RVA pasting parameters of peak viscosity determined in water (PV1) and that determined in 0.05 mM AgNO3 (used as an amylase inhibitor) (PV2) were successfully used to estimate α-amylase activity. The correlation of the ratio (PV2-PV1)/PV1 to α-amylase activity was 0.96 (p < 0.01, N = 44). Swelling volume measurements were not found to be suitable for prediction of α-amylase activity.
Original language | English |
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Pages (from-to) | 832-835 |
Number of pages | 4 |
Journal | Journal of Agricultural and Food Chemistry |
Volume | 47 |
Issue number | 3 |
DOIs | |
State | Published - Mar 1999 |
Externally published | Yes |
Keywords
- Amylase activity
- Ipomoea batatas
- Peak viscosity
- Rapid Visco-Analyzer
- Sweetpotato
- Swelling volume
- Viscoamylograph