Predictive models for the estimation of residual ascorbic acid (rAA) and ascorbic acid percent change (%
AAr) in heat-treated simulated fruit juices were established. The tested ranges of predictor product
properties (pH and initial AA level) were based on initial surveys conducted involving processed and
freshly squeezed juices, while those of predictor process parameters (heating temperature and treatment
time) were based on thermal inactivation of Escherichia coli O157:H7 modeled earlier in our lab. Results
showed that both rAA and %AAr data sets had highly significant (P < 0.0001) fit in a linear and quadratic
model, respectively. Temperature, time, and initial AA were found significant predictors of rAA. On the
other hand, temperature, time, initial AA, temperature2 and initial AA2 were found to be significant
predictors of %AAr. Predictive performance indices were within acceptable values, confirming model
utility in decision making for a more comprehensive control of juice nutritional functional quality and
safety.
Predictive models for the estimation of residual ascorbic acid (rAA) and ascorbic acid percent change (%AAr) in heat-treated simulated fruit juices were established. The tested ranges of predictor productproperties (pH and initial AA level) were based on initial surveys conducted involving processed andfreshly squeezed juices, while those of predictor process parameters (heating temperature and treatmenttime) were based on thermal inactivation of Escherichia coli O157:H7 modeled earlier in our lab. Resultsshowed that both rAA and %AAr data sets had highly significant (P < 0.0001) fit in a linear and quadraticmodel, respectively. Temperature, time, and initial AA were found significant predictors of rAA. On theother hand, temperature, time, initial AA, temperature2 and initial AA2 were found to be significantpredictors of %AAr. Predictive performance indices were within acceptable values, confirming modelutility in decision making for a more comprehensive control of juice nutritional functional quality andsafety.
การแปล กรุณารอสักครู่..
