Time Temperature Integrators (Tti) to Control the Distribution Chain of Horticultural Products

Smart Packaging Technologies for Fruits and Vegetables

“…The E a value is a characteristic of the TTI and it is used to select a suitable indicator for a specific application, knowing the E a of the degradation of the critical characteristic of the product. The major factors that affect the reliability of a TTI are: (i) the variability in the value of response between indicators of the same type at the same conditions; (ii) the uncertainty in the Arrhenius model of the TTI; and (iii) the difference between the activation energies of the food product and the TTI [8]. The performance and reproducibility of the indicators should be assessed by a series of tests under controlled conditions, in particular, the temperature response test, the temperature cycling test including abuse temperatures, and the accuracy of point of activation and of end point determination.…”

RFID tag antenna based temperature sensing using shape memory polymer actuation

“…Bobelyn et al [15] present metrics to quantify the quality of fresh produce, like lettuce, and relate degradation of food quality with temperature to a first order Arrhenius exponential decay. They also list estimates of the activation energy E a and the reaction rate k ref for different types of fresh produce.…”

“…They also list estimates of the activation energy E a and the reaction rate k ref for different types of fresh produce. We make use of the formulation presented in [15] to quantify the time taken for a quality degradation of lettuce with temperature. Fig.…”

“…7 illustrates the time taken for the quality of lettuce to decay by 0.2% as a function of temperature. The uncertainty associated with the decay of food quality stem from the uncertainty associated with E a and k ref as outlined in [15].…”